From: Ben Gras Date: Wed, 31 Oct 2012 18:24:14 +0000 (+0100) Subject: vm: merge i386 and arm pagetable code X-Git-Tag: v3.2.1~233 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/style.css?a=commitdiff_plain;h=3771a0833de9a566b0f86c06221ed1b1a01bd6f9;p=minix.git vm: merge i386 and arm pagetable code --- diff --git a/servers/vm/arch/arm/Makefile.inc b/servers/vm/arch/arm/Makefile.inc index f3d71c80b..a6a6603ba 100644 --- a/servers/vm/arch/arm/Makefile.inc +++ b/servers/vm/arch/arm/Makefile.inc @@ -1,5 +1,5 @@ .include #Arch-specific sources -.PATH: ${.CURDIR}/arch/${MACHINE_ARCH} -SRCS+= pagetable.c #util.S +.PATH: ${.CURDIR}/arch/i386 +SRCS+= pagetable.c diff --git a/servers/vm/arch/arm/memory.h b/servers/vm/arch/arm/memory.h deleted file mode 100644 index 4ceb0464e..000000000 --- a/servers/vm/arch/arm/memory.h +++ /dev/null @@ -1,12 +0,0 @@ -#include - -/* And what is the highest addressable piece of memory, when in paged - * mode? - */ -#define VM_DATATOP kernel_boot_info.user_end -#define VM_STACKTOP kernel_boot_info.user_sp - -#define SLAB_PAGESIZE ARM_PAGE_SIZE -#define VM_PAGE_SIZE ARM_PAGE_SIZE - -#define CLICKSPERPAGE (ARM_PAGE_SIZE/CLICK_SIZE) diff --git a/servers/vm/arch/arm/pagefaults.h b/servers/vm/arch/arm/pagefaults.h deleted file mode 100644 index 757cb7fb6..000000000 --- a/servers/vm/arch/arm/pagefaults.h +++ /dev/null @@ -1,14 +0,0 @@ - -#ifndef _PAGEFAULTS_H -#define _PAGEFAULTS_H 1 - -#include - -#define PFERR_PROT(e) ((ARM_VM_PFE_FS(e) == ARM_VM_PFE_L1PERM) \ - || (ARM_VM_PFE_FS(e) == ARM_VM_PFE_L2PERM)) -#define PFERR_NOPAGE(e) (!PFERR_PROT(e)) -#define PFERR_WRITE(e) ((e) & ARM_VM_PFE_W) -#define PFERR_READ(e) (!((e) & ARM_VM_PFE_W)) - -#endif - diff --git a/servers/vm/arch/arm/pagetable.c b/servers/vm/arch/arm/pagetable.c deleted file mode 100644 index 841fd4137..000000000 --- a/servers/vm/arch/arm/pagetable.c +++ /dev/null @@ -1,1261 +0,0 @@ - -#define _SYSTEM 1 -#define _POSIX_SOURCE 1 - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -#include "proto.h" -#include "glo.h" -#include "util.h" -#include "vm.h" -#include "sanitycheck.h" - -#include "memory.h" - -static int vm_self_pages; - -/* PDE used to map in kernel, kernel physical address. */ -static int pagedir_pde = -1; -static u32_t pagedir_pde_val; - -static multiboot_module_t *kern_mb_mod = NULL; -static size_t kern_size = 0; -static int kern_start_pde = -1; - -/* 1MB page size available in hardware? */ -static int bigpage_ok = 1; - -/* Our process table entry. */ -struct vmproc *vmprocess = &vmproc[VM_PROC_NR]; - -/* Spare memory, ready to go after initialization, to avoid a - * circular dependency on allocating memory and writing it into VM's - * page table. - */ -#define SPAREPAGEDIRS 11 -#define STATIC_SPAREPAGEDIRS 10 -#define SPAREPAGES 250 -#define STATIC_SPAREPAGES 100 -int missing_sparedirs = SPAREPAGEDIRS; -static struct { - void *pagedir; - phys_bytes phys; -} sparepagedirs[SPAREPAGEDIRS]; - -int missing_spares = SPAREPAGES; -static struct { - void *page; - phys_bytes phys; -} sparepages[SPAREPAGES]; - -extern char _end; -#define is_staticaddr(v) ((vir_bytes) (v) < (vir_bytes) &_end) - -#define MAX_KERNMAPPINGS 10 -static struct { - phys_bytes phys_addr; /* Physical addr. */ - phys_bytes len; /* Length in bytes. */ - vir_bytes vir_addr; /* Offset in page table. */ - int flags; -} kern_mappings[MAX_KERNMAPPINGS]; -int kernmappings = 0; - -/* Clicks must be pages, as - * - they must be page aligned to map them - * - they must be a multiple of the page size - * - it's inconvenient to have them bigger than pages, because we often want - * just one page - * May as well require them to be equal then. - */ -#if CLICK_SIZE != ARM_PAGE_SIZE -#error CLICK_SIZE must be page size. -#endif - -/* Page table that contains pointers to all page directories. */ -phys_bytes page_directories_phys; -u32_t *page_directories = NULL; - -static char static_sparepagedirs[ARM_PAGEDIR_SIZE*STATIC_SPAREPAGEDIRS + ARM_PAGEDIR_SIZE] __aligned(ARM_PAGEDIR_SIZE); - -static char static_sparepages[ARM_PAGE_SIZE*STATIC_SPAREPAGES] __aligned(ARM_PAGE_SIZE); - -#if SANITYCHECKS -/*===========================================================================* - * pt_sanitycheck * - *===========================================================================*/ -void pt_sanitycheck(pt_t *pt, char *file, int line) -{ -/* Basic pt sanity check. */ - int slot; - - MYASSERT(pt); - MYASSERT(pt->pt_dir); - MYASSERT(pt->pt_dir_phys); - - for(slot = 0; slot < ELEMENTS(vmproc); slot++) { - if(pt == &vmproc[slot].vm_pt) - break; - } - - if(slot >= ELEMENTS(vmproc)) { - panic("pt_sanitycheck: passed pt not in any proc"); - } - - MYASSERT(usedpages_add(pt->pt_dir_phys, ARM_PAGE_SIZE) == OK); -} -#endif - -/*===========================================================================* - * findhole * - *===========================================================================*/ -static u32_t findhole(int pages) -{ -/* Find a space in the virtual address space of VM. */ - u32_t curv; - int pde = 0, try_restart; - static u32_t lastv = 0; - pt_t *pt = &vmprocess->vm_pt; - vir_bytes vmin, vmax; - u32_t holev; - - vmin = (vir_bytes) (&_end) & ARM_VM_ADDR_MASK; /* marks end of VM BSS */ - vmax = VM_STACKTOP; - - /* Input sanity check. */ - assert(vmin + ARM_PAGE_SIZE >= vmin); - assert(vmax >= vmin + ARM_PAGE_SIZE); - assert((vmin % ARM_PAGE_SIZE) == 0); - assert((vmax % ARM_PAGE_SIZE) == 0); - assert(pages > 0); - -#if SANITYCHECKS - curv = ((u32_t) random()) % ((vmax - vmin)/ARM_PAGE_SIZE); - curv *= ARM_PAGE_SIZE; - curv += vmin; -#else - curv = lastv; - if(curv < vmin || curv >= vmax) - curv = vmin; -#endif - try_restart = 1; - - /* Start looking for a free page starting at vmin. */ - while(curv < vmax) { - int pte; - int i, nohole; - - assert(curv >= vmin); - assert(curv < vmax); - - holev = curv; /* the candidate hole */ - nohole = 0; - for (i = 0; i < pages && !nohole; ++i) { - if(curv >= vmax) { - break; - } - - pde = ARM_VM_PDE(curv); - pte = ARM_VM_PTE(curv); - - /* if page present, no hole */ - if((pt->pt_dir[pde] & ARM_VM_PDE_PRESENT) && - (pt->pt_pt[pde][pte] & ARM_VM_PTE_PRESENT)) - nohole = 1; - - /* if not contiguous, no hole */ - if (curv != holev + i * ARM_PAGE_SIZE) - nohole = 1; - - curv+=ARM_PAGE_SIZE; - } - - /* there's a large enough hole */ - if (!nohole && i == pages) { - lastv = curv; - return holev; - } - - /* Reset curv */ - if(curv >= vmax && try_restart) { - curv = vmin; - try_restart = 0; - } - } - - printf("VM: out of virtual address space in vm\n"); - - return NO_MEM; -} - -/*===========================================================================* - * vm_freepages * - *===========================================================================*/ -void vm_freepages(vir_bytes vir, int pages) -{ - assert(!(vir % ARM_PAGE_SIZE)); - - if(is_staticaddr(vir)) { - printf("VM: not freeing static page\n"); - return; - } - - if(pt_writemap(vmprocess, &vmprocess->vm_pt, vir, - MAP_NONE, pages*ARM_PAGE_SIZE, 0, - WMF_OVERWRITE | WMF_FREE) != OK) - panic("vm_freepages: pt_writemap failed"); - - vm_self_pages--; - -#if SANITYCHECKS - /* If SANITYCHECKS are on, flush tlb so accessing freed pages is - * always trapped, also if not in tlb. - */ - if((sys_vmctl(SELF, VMCTL_FLUSHTLB, 0)) != OK) { - panic("VMCTL_FLUSHTLB failed"); - } -#endif -} - -/*===========================================================================* - * vm_getsparepage * - *===========================================================================*/ -static void *vm_getsparepage(phys_bytes *phys) -{ - int s; - assert(missing_spares >= 0 && missing_spares <= SPAREPAGES); - for(s = 0; s < SPAREPAGES; s++) { - if(sparepages[s].page) { - void *sp; - sp = sparepages[s].page; - *phys = sparepages[s].phys; - sparepages[s].page = NULL; - missing_spares++; - assert(missing_spares >= 0 && missing_spares <= SPAREPAGES); - return sp; - } - } - return NULL; -} - -/*===========================================================================* - * vm_getsparepagedir * - *===========================================================================*/ -static void *vm_getsparepagedir(phys_bytes *phys) -{ - int s; - assert(missing_sparedirs >= 0 && missing_sparedirs <= SPAREPAGEDIRS); - for(s = 0; s < SPAREPAGEDIRS; s++) { - if(sparepagedirs[s].pagedir) { - void *sp; - sp = sparepagedirs[s].pagedir; - *phys = sparepagedirs[s].phys; - sparepagedirs[s].pagedir = NULL; - missing_sparedirs++; - assert(missing_sparedirs >= 0 && missing_sparedirs <= SPAREPAGEDIRS); - return sp; - } - } - return NULL; -} - -/*===========================================================================* - * vm_checkspares * - *===========================================================================*/ -static void *vm_checkspares(void) -{ - int s, n = 0; - static int total = 0, worst = 0; - assert(missing_spares >= 0 && missing_spares <= SPAREPAGES); - for(s = 0; s < SPAREPAGES && missing_spares > 0; s++) - if(!sparepages[s].page) { - n++; - if((sparepages[s].page = vm_allocpage(&sparepages[s].phys, - VMP_SPARE))) { - missing_spares--; - assert(missing_spares >= 0); - assert(missing_spares <= SPAREPAGES); - } else { - printf("VM: warning: couldn't get new spare page\n"); - } - } - if(worst < n) worst = n; - total += n; - - return NULL; -} - -/*===========================================================================* - * vm_checksparedirs * - *===========================================================================*/ -static void *vm_checksparedirs(void) -{ - int s, n = 0; - static int total = 0, worst = 0; - assert(missing_sparedirs >= 0 && missing_sparedirs <= SPAREPAGEDIRS); - for(s = 0; s < SPAREPAGEDIRS && missing_sparedirs > 0; s++) - if(!sparepagedirs[s].pagedir) { - n++; - if((sparepagedirs[s].pagedir = vm_allocpage(&sparepagedirs[s].phys, - VMP_SPARE))) { - missing_sparedirs--; - assert(missing_sparedirs >= 0); - assert(missing_sparedirs <= SPAREPAGEDIRS); - } else { - printf("VM: warning: couldn't get new spare pagedir\n"); - } - } - if(worst < n) worst = n; - total += n; - - return NULL; -} - -static int pt_init_done; - -/*===========================================================================* - * vm_allocpage * - *===========================================================================*/ -void *vm_allocpage(phys_bytes *phys, int reason) -{ -/* Allocate a page for use by VM itself. */ - phys_bytes newpage; - vir_bytes loc; - pt_t *pt; - int r; - static int level = 0; - void *ret; - u32_t mem_bytes, mem_clicks, mem_flags; - - pt = &vmprocess->vm_pt; - assert(reason >= 0 && reason < VMP_CATEGORIES); - - level++; - - assert(level >= 1); - assert(level <= 2); - - if(level > 1 || !pt_init_done) { - void *s; - - if (reason == VMP_PAGEDIR) - s=vm_getsparepagedir(phys); - else - s=vm_getsparepage(phys); - - level--; - if(!s) { - util_stacktrace(); - printf("VM: warning: out of spare pages\n"); - } - if(!is_staticaddr(s)) vm_self_pages++; - return s; - } - - if (reason == VMP_PAGEDIR) { - mem_bytes = ARM_PAGEDIR_SIZE; - mem_flags = PAF_ALIGN16K; - } else { - mem_bytes = ARM_PAGE_SIZE; - mem_flags = 0; - } - mem_clicks = mem_bytes / ARM_PAGE_SIZE * CLICKSPERPAGE; - - /* VM does have a pagetable, so get a page and map it in there. - * Where in our virtual address space can we put it? - */ - loc = findhole(mem_bytes / ARM_PAGE_SIZE); - if(loc == NO_MEM) { - level--; - printf("VM: vm_allocpage: findhole failed\n"); - return NULL; - } - - /* Allocate page of memory for use by VM. As VM - * is trusted, we don't have to pre-clear it. - */ - if((newpage = alloc_mem(mem_clicks, mem_flags)) == NO_MEM) { - level--; - printf("VM: vm_allocpage: alloc_mem failed\n"); - return NULL; - } - - *phys = CLICK2ABS(newpage); - - /* Map this page into our address space. */ - if((r=pt_writemap(vmprocess, pt, loc, *phys, mem_bytes, - ARM_VM_PTE_PRESENT | ARM_VM_PTE_USER | ARM_VM_PTE_RW | - ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE, 0)) != OK) { - free_mem(newpage, mem_clicks); - printf("vm_allocpage writemap failed\n"); - level--; - return NULL; - } - - if((r=sys_vmctl(SELF, VMCTL_FLUSHTLB, 0)) != OK) { - panic("VMCTL_FLUSHTLB failed: %d", r); - } - - level--; - - /* Return user-space-ready pointer to it. */ - ret = (void *) loc; - - vm_self_pages++; - return ret; -} - -/*===========================================================================* - * vm_pagelock * - *===========================================================================*/ -void vm_pagelock(void *vir, int lockflag) -{ -/* Mark a page allocated by vm_allocpage() unwritable, i.e. only for VM. */ - vir_bytes m = (vir_bytes) vir; - int r; - u32_t flags = ARM_VM_PTE_PRESENT | ARM_VM_PTE_USER; - pt_t *pt; - - pt = &vmprocess->vm_pt; - - assert(!(m % ARM_PAGE_SIZE)); - - if(!lockflag) - flags |= ARM_VM_PTE_RW; - else - flags |= ARM_VM_PTE_RO; - flags |= ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE; - - /* Update flags. */ - if((r=pt_writemap(vmprocess, pt, m, 0, ARM_PAGE_SIZE, - flags, WMF_OVERWRITE | WMF_WRITEFLAGSONLY)) != OK) { - panic("vm_lockpage: pt_writemap failed"); - } - - if((r=sys_vmctl(SELF, VMCTL_FLUSHTLB, 0)) != OK) { - panic("VMCTL_FLUSHTLB failed: %d", r); - } - - return; -} - -/*===========================================================================* - * vm_addrok * - *===========================================================================*/ -int vm_addrok(void *vir, int writeflag) -{ - pt_t *pt = &vmprocess->vm_pt; - int pde, pte; - vir_bytes v = (vir_bytes) vir; - - pde = ARM_VM_PDE(v); - pte = ARM_VM_PTE(v); - - if(!(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT)) { - printf("addr not ok: missing pde %d\n", pde); - return 0; - } - - if(!(pt->pt_pt[pde][pte] & ARM_VM_PTE_PRESENT)) { - printf("addr not ok: missing pde %d / pte %d\n", - pde, pte); - return 0; - } - - if(!writeflag && - !(pt->pt_pt[pde][pte] & ARM_VM_PTE_RO)) { - printf("addr not ok: pde %d / pte %d present but writable\n", - pde, pte); - return 0; - } - - return 1; -} - -/*===========================================================================* - * pt_ptalloc * - *===========================================================================*/ -static int pt_ptalloc(pt_t *pt, int pde, u32_t flags) -{ -/* Allocate a page table and write its address into the page directory. */ - int i; - phys_bytes pt_phys; - - /* Argument must make sense. */ - assert(pde >= 0 && pde < ARM_VM_DIR_ENTRIES); - assert(!(flags & ~(PTF_ALLFLAGS))); - - /* We don't expect to overwrite page directory entry, nor - * storage for the page table. - */ - assert(!(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT)); - assert(!pt->pt_pt[pde]); - - /* Get storage for the page table. */ - if(!(pt->pt_pt[pde] = vm_allocpage(&pt_phys, VMP_PAGETABLE))) - return ENOMEM; - - for(i = 0; i < ARM_VM_PT_ENTRIES; i++) - pt->pt_pt[pde][i] = 0; /* Empty entry. */ - - /* Make page directory entry. - * The PDE is always 'present,' 'writable,' and 'user accessible,' - * relying on the PTE for protection. - */ - pt->pt_dir[pde] = (pt_phys & ARM_VM_PDE_MASK) - | ARM_VM_PDE_PRESENT | ARM_VM_PDE_DOMAIN; - - return OK; -} - -/*===========================================================================* - * pt_ptalloc_in_range * - *===========================================================================*/ -int pt_ptalloc_in_range(pt_t *pt, vir_bytes start, vir_bytes end, - u32_t flags, int verify) -{ -/* Allocate all the page tables in the range specified. */ - int pde, first_pde, last_pde; - - first_pde = ARM_VM_PDE(start); - last_pde = ARM_VM_PDE(end-1); - assert(first_pde >= 0); - assert(last_pde < ARM_VM_DIR_ENTRIES); - - /* Scan all page-directory entries in the range. */ - for(pde = first_pde; pde <= last_pde; pde++) { - assert(!(pt->pt_dir[pde] & ARM_VM_BIGPAGE)); - if(!(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT)) { - int r; - if(verify) { - printf("pt_ptalloc_in_range: no pde %d\n", pde); - return EFAULT; - } - assert(!pt->pt_dir[pde]); - if((r=pt_ptalloc(pt, pde, flags)) != OK) { - /* Couldn't do (complete) mapping. - * Don't bother freeing any previously - * allocated page tables, they're - * still writable, don't point to nonsense, - * and pt_ptalloc leaves the directory - * and other data in a consistent state. - */ - printf("pt_ptalloc_in_range: pt_ptalloc failed\n"); - return r; - } - } - assert(pt->pt_dir[pde]); - assert(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT); - } - - return OK; -} - -static char *ptestr(u32_t pte) -{ -#define FLAG(constant, name) { \ - if(pte & (constant)) { strcat(str, name); strcat(str, " "); } \ -} - - static char str[30]; - if(!(pte & ARM_VM_PTE_PRESENT)) { - return "not present"; - } - str[0] = '\0'; - if(pte & ARM_VM_PTE_RO) { - strcat(str, "R "); - } else { - strcat(str, "W "); - } - FLAG(ARM_VM_PTE_USER, "U"); - FLAG(ARM_VM_PTE_SUPER, "S"); - FLAG(ARM_VM_PTE_SHAREABLE, "SH"); - FLAG(ARM_VM_PTE_WB, "WB"); - FLAG(ARM_VM_PTE_WT, "WT"); - - return str; -} - -/*===========================================================================* - * pt_map_in_range * - *===========================================================================*/ -int pt_map_in_range(struct vmproc *src_vmp, struct vmproc *dst_vmp, - vir_bytes start, vir_bytes end) -{ -/* Transfer all the mappings from the pt of the source process to the pt of - * the destination process in the range specified. - */ - int pde, pte; - vir_bytes viraddr; - pt_t *pt, *dst_pt; - - pt = &src_vmp->vm_pt; - dst_pt = &dst_vmp->vm_pt; - - end = end ? end : VM_DATATOP; - assert(start % ARM_PAGE_SIZE == 0); - assert(end % ARM_PAGE_SIZE == 0); - assert(ARM_VM_PDE(start) >= 0 && start <= end); - assert(ARM_VM_PDE(end) < ARM_VM_DIR_ENTRIES); - -#if LU_DEBUG - printf("VM: pt_map_in_range: src = %d, dst = %d\n", - src_vmp->vm_endpoint, dst_vmp->vm_endpoint); - printf("VM: pt_map_in_range: transferring from 0x%08x (pde %d pte %d) to 0x%08x (pde %d pte %d)\n", - start, ARM_VM_PDE(start), ARM_VM_PTE(start), - end, ARM_VM_PDE(end), ARM_VM_PTE(end)); -#endif - - /* Scan all page-table entries in the range. */ - for(viraddr = start; viraddr <= end; viraddr += ARM_PAGE_SIZE) { - pde = ARM_VM_PDE(viraddr); - if(!(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT)) { - if(viraddr == VM_DATATOP) break; - continue; - } - pte = ARM_VM_PTE(viraddr); - if(!(pt->pt_pt[pde][pte] & ARM_VM_PTE_PRESENT)) { - if(viraddr == VM_DATATOP) break; - continue; - } - - /* Transfer the mapping. */ - dst_pt->pt_pt[pde][pte] = pt->pt_pt[pde][pte]; - - if(viraddr == VM_DATATOP) break; - } - - return OK; -} - -/*===========================================================================* - * pt_ptmap * - *===========================================================================*/ -int pt_ptmap(struct vmproc *src_vmp, struct vmproc *dst_vmp) -{ -/* Transfer mappings to page dir and page tables from source process and - * destination process. Make sure all the mappings are above the stack, not - * to corrupt valid mappings in the data segment of the destination process. - */ - int pde, r; - phys_bytes physaddr; - vir_bytes viraddr; - pt_t *pt; - - pt = &src_vmp->vm_pt; - -#if LU_DEBUG - printf("VM: pt_ptmap: src = %d, dst = %d\n", - src_vmp->vm_endpoint, dst_vmp->vm_endpoint); -#endif - - /* Transfer mapping to the page directory. */ - viraddr = (vir_bytes) pt->pt_dir; - physaddr = pt->pt_dir_phys & ARM_VM_ADDR_MASK; - if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, ARM_PAGEDIR_SIZE, - ARM_VM_PTE_PRESENT | ARM_VM_PTE_USER | ARM_VM_PTE_RW | - ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE, - WMF_OVERWRITE)) != OK) { - return r; - } -#if LU_DEBUG - printf("VM: pt_ptmap: transferred mapping to page dir: 0x%08x (0x%08x)\n", - viraddr, physaddr); -#endif - - /* Scan all non-reserved page-directory entries. */ - for(pde=0; pde < ARM_VM_DIR_ENTRIES; pde++) { - if(!(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT)) { - continue; - } - - /* Transfer mapping to the page table. */ - viraddr = (vir_bytes) pt->pt_pt[pde]; - physaddr = pt->pt_dir[pde] & ARM_VM_PDE_MASK; - if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, ARM_PAGE_SIZE, - ARM_VM_PTE_PRESENT | ARM_VM_PTE_USER | ARM_VM_PTE_RW | - ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE, - WMF_OVERWRITE)) != OK) { - return r; - } - } - - return OK; -} - -void pt_clearmapcache(void) -{ - /* Make sure kernel will invalidate tlb when using current - * pagetable (i.e. vm's) to make new mappings before new cr3 - * is loaded. - */ - if(sys_vmctl(SELF, VMCTL_CLEARMAPCACHE, 0) != OK) - panic("VMCTL_CLEARMAPCACHE failed"); -} - -/*===========================================================================* - * pt_writemap * - *===========================================================================*/ -int pt_writemap(struct vmproc * vmp, - pt_t *pt, - vir_bytes v, - phys_bytes physaddr, - size_t bytes, - u32_t flags, - u32_t writemapflags) -{ -/* Write mapping into page table. Allocate a new page table if necessary. */ -/* Page directory and table entries for this virtual address. */ - int p, pages; - int verify = 0; - int ret = OK; - -#ifdef CONFIG_SMP - int vminhibit_clear = 0; - /* FIXME - * don't do it everytime, stop the process only on the first change and - * resume the execution on the last change. Do in a wrapper of this - * function - */ - if (vmp && vmp->vm_endpoint != NONE && vmp->vm_endpoint != VM_PROC_NR && - !(vmp->vm_flags & VMF_EXITING)) { - sys_vmctl(vmp->vm_endpoint, VMCTL_VMINHIBIT_SET, 0); - vminhibit_clear = 1; - } -#endif - - if(writemapflags & WMF_VERIFY) - verify = 1; - - assert(!(bytes % ARM_PAGE_SIZE)); - assert(!(flags & ~(PTF_ALLFLAGS))); - - pages = bytes / ARM_PAGE_SIZE; - - /* MAP_NONE means to clear the mapping. It doesn't matter - * what's actually written into the PTE if ARM_VM_PRESENT - * isn't on, so we can just write MAP_NONE into it. - */ - assert(physaddr == MAP_NONE || (flags & ARM_VM_PTE_PRESENT)); - assert(physaddr != MAP_NONE || !flags); - - /* First make sure all the necessary page tables are allocated, - * before we start writing in any of them, because it's a pain - * to undo our work properly. - */ - ret = pt_ptalloc_in_range(pt, v, v + ARM_PAGE_SIZE*pages, flags, verify); - if(ret != OK) { - printf("VM: writemap: pt_ptalloc_in_range failed\n"); - goto resume_exit; - } - - /* Now write in them. */ - for(p = 0; p < pages; p++) { - u32_t entry; - int pde = ARM_VM_PDE(v); - int pte = ARM_VM_PTE(v); - - if(!v) { printf("VM: warning: making zero page for %d\n", - vmp->vm_endpoint); } - - assert(!(v % ARM_PAGE_SIZE)); - assert(pte >= 0 && pte < ARM_VM_PT_ENTRIES); - assert(pde >= 0 && pde < ARM_VM_DIR_ENTRIES); - - /* Page table has to be there. */ - assert(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT); - - /* We do not expect it to be a bigpage. */ - assert(!(pt->pt_dir[pde] & ARM_VM_BIGPAGE)); - - /* Make sure page directory entry for this page table - * is marked present and page table entry is available. - */ - assert(pt->pt_pt[pde]); - -#if SANITYCHECKS - /* We don't expect to overwrite a page. */ - if(!(writemapflags & (WMF_OVERWRITE|WMF_VERIFY))) - assert(!(pt->pt_pt[pde][pte] & ARM_VM_PTE_PRESENT)); -#endif - if(writemapflags & (WMF_WRITEFLAGSONLY|WMF_FREE)) { - physaddr = pt->pt_pt[pde][pte] & ARM_VM_PTE_MASK; - } - - if(writemapflags & WMF_FREE) { - free_mem(ABS2CLICK(physaddr), 1); - } - - /* Entry we will write. */ - entry = (physaddr & ARM_VM_PTE_MASK) | flags; - - if(verify) { - u32_t maskedentry; - maskedentry = pt->pt_pt[pde][pte]; - /* Verify pagetable entry. */ - if(entry & ARM_VM_PTE_RW) { - /* If we expect a writable page, allow a readonly page. */ - maskedentry |= ARM_VM_PTE_RW; - } - if(maskedentry != entry) { - printf("pt_writemap: mismatch: "); - if((entry & ARM_VM_PTE_MASK) != - (maskedentry & ARM_VM_PTE_MASK)) { - printf("pt_writemap: physaddr mismatch (0x%lx, 0x%lx); ", - (long)entry, (long)maskedentry); - } else printf("phys ok; "); - printf(" flags: found %s; ", - ptestr(pt->pt_pt[pde][pte])); - printf(" masked %s; ", - ptestr(maskedentry)); - printf(" expected %s\n", ptestr(entry)); - ret = EFAULT; - goto resume_exit; - } - } else { - /* Write pagetable entry. */ - pt->pt_pt[pde][pte] = entry; - } - - physaddr += ARM_PAGE_SIZE; - v += ARM_PAGE_SIZE; - } - -resume_exit: - -#ifdef CONFIG_SMP - if (vminhibit_clear) { - assert(vmp && vmp->vm_endpoint != NONE && vmp->vm_endpoint != VM_PROC_NR && - !(vmp->vm_flags & VMF_EXITING)); - sys_vmctl(vmp->vm_endpoint, VMCTL_VMINHIBIT_CLEAR, 0); - } -#endif - - return ret; -} - -/*===========================================================================* - * pt_checkrange * - *===========================================================================*/ -int pt_checkrange(pt_t *pt, vir_bytes v, size_t bytes, - int write) -{ - int p, pages; - - assert(!(bytes % ARM_PAGE_SIZE)); - - pages = bytes / ARM_PAGE_SIZE; - - for(p = 0; p < pages; p++) { - int pde = ARM_VM_PDE(v); - int pte = ARM_VM_PTE(v); - - assert(!(v % ARM_PAGE_SIZE)); - assert(pte >= 0 && pte < ARM_VM_PT_ENTRIES); - assert(pde >= 0 && pde < ARM_VM_DIR_ENTRIES); - - /* Page table has to be there. */ - if(!(pt->pt_dir[pde] & ARM_VM_PDE_PRESENT)) - return EFAULT; - - /* Make sure page directory entry for this page table - * is marked present and page table entry is available. - */ - assert((pt->pt_dir[pde] & ARM_VM_PDE_PRESENT) && pt->pt_pt[pde]); - - if(!(pt->pt_pt[pde][pte] & ARM_VM_PTE_PRESENT)) { - return EFAULT; - } - - if(write && (pt->pt_pt[pde][pte] & ARM_VM_PTE_RO)) { - return EFAULT; - } - - v += ARM_PAGE_SIZE; - } - - return OK; -} - -/*===========================================================================* - * pt_new * - *===========================================================================*/ -int pt_new(pt_t *pt) -{ -/* Allocate a pagetable root. On ARM, allocate a page-aligned page directory - * and set them to 0 (indicating no page tables are allocated). Lookup - * its physical address as we'll need that in the future. Verify it's - * page-aligned. - */ - int i; - - /* Don't ever re-allocate/re-move a certain process slot's - * page directory once it's been created. This is a fraction - * faster, but also avoids having to invalidate the page - * mappings from in-kernel page tables pointing to - * the page directories (the page_directories data). - */ - if(!pt->pt_dir && - !(pt->pt_dir = vm_allocpage((phys_bytes *)&pt->pt_dir_phys, VMP_PAGEDIR))) { - return ENOMEM; - } - assert(!((u32_t)pt->pt_dir_phys % ARM_PAGEDIR_SIZE)); - - for(i = 0; i < ARM_VM_DIR_ENTRIES; i++) { - pt->pt_dir[i] = 0; /* invalid entry (ARM_VM_PRESENT bit = 0) */ - pt->pt_pt[i] = NULL; - } - - /* Where to start looking for free virtual address space? */ - pt->pt_virtop = 0; - - /* Map in kernel. */ - if(pt_mapkernel(pt) != OK) - panic("pt_new: pt_mapkernel failed"); - - return OK; -} - -static int freepde(void) -{ - int p = kernel_boot_info.freepde_start++; - assert(kernel_boot_info.freepde_start < ARM_VM_DIR_ENTRIES); - return p; -} - -/*===========================================================================* - * pt_init * - *===========================================================================*/ -void pt_init(void) -{ - pt_t *newpt; - int s, r, p; - vir_bytes sparepages_mem; - vir_bytes sparepagedirs_mem; - static u32_t currentpagedir[ARM_VM_DIR_ENTRIES]; - int m = kernel_boot_info.kern_mod; - u32_t myttbr; - - /* Find what the physical location of the kernel is. */ - assert(m >= 0); - assert(m < kernel_boot_info.mods_with_kernel); - assert(kernel_boot_info.mods_with_kernel < MULTIBOOT_MAX_MODS); - kern_mb_mod = &kernel_boot_info.module_list[m]; - kern_size = kern_mb_mod->mod_end - kern_mb_mod->mod_start; - assert(!(kern_mb_mod->mod_start % ARM_BIG_PAGE_SIZE)); - assert(!(kernel_boot_info.vir_kern_start % ARM_BIG_PAGE_SIZE)); - kern_start_pde = kernel_boot_info.vir_kern_start / ARM_BIG_PAGE_SIZE; - - /* Get ourselves spare pages. */ - sparepages_mem = (vir_bytes) static_sparepages; - assert(!(sparepages_mem % ARM_PAGE_SIZE)); - - /* Get ourselves spare pagedirs. */ - sparepagedirs_mem = (vir_bytes) static_sparepagedirs; - assert(!(sparepagedirs_mem % ARM_PAGEDIR_SIZE)); - - /* Spare pages are used to allocate memory before VM has its own page - * table that things (i.e. arbitrary physical memory) can be mapped into. - * We get it by pre-allocating it in our bss (allocated and mapped in by - * the kernel) in static_sparepages. We also need the physical addresses - * though; we look them up now so they are ready for use. - */ - missing_sparedirs = 0; - assert(STATIC_SPAREPAGEDIRS < SPAREPAGEDIRS); - for(s = 0; s < SPAREPAGEDIRS; s++) { - vir_bytes v = (sparepagedirs_mem + s*ARM_PAGEDIR_SIZE);; - phys_bytes ph; - if((r=sys_umap(SELF, VM_D, (vir_bytes) v, - ARM_PAGEDIR_SIZE, &ph)) != OK) - panic("pt_init: sys_umap failed: %d", r); - if(s >= STATIC_SPAREPAGEDIRS) { - sparepagedirs[s].pagedir = NULL; - missing_sparedirs++; - continue; - } - sparepagedirs[s].pagedir = (void *) v; - sparepagedirs[s].phys = ph; - } - - missing_spares = 0; - assert(STATIC_SPAREPAGES < SPAREPAGES); - for(s = 0; s < SPAREPAGES; s++) { - vir_bytes v = (sparepages_mem + s*ARM_PAGE_SIZE);; - phys_bytes ph; - if((r=sys_umap(SELF, VM_D, (vir_bytes) v, - ARM_PAGE_SIZE*SPAREPAGES, &ph)) != OK) - panic("pt_init: sys_umap failed: %d", r); - if(s >= STATIC_SPAREPAGES) { - sparepages[s].page = NULL; - missing_spares++; - continue; - } - sparepages[s].page = (void *) v; - sparepages[s].phys = ph; - } - - /* 1MB pages available? */ - bigpage_ok = 1; - - /* Allocate us a page table in which to remember page directory - * pointers. - */ - if(!(page_directories = vm_allocpage(&page_directories_phys, - VMP_PAGETABLE))) - panic("no virt addr for vm mappings"); - - memset(page_directories, 0, ARM_PAGE_SIZE); - - /* Now reserve another pde for kernel's own mappings. */ - { - int kernmap_pde; - phys_bytes addr, len; - int flags, index = 0; - u32_t offset = 0; - - kernmap_pde = freepde(); - offset = kernmap_pde * ARM_BIG_PAGE_SIZE; - - while(sys_vmctl_get_mapping(index, &addr, &len, - &flags) == OK) { - vir_bytes vir; - if(index >= MAX_KERNMAPPINGS) - panic("VM: too many kernel mappings: %d", index); - kern_mappings[index].phys_addr = addr; - kern_mappings[index].len = len; - kern_mappings[index].flags = flags; - kern_mappings[index].vir_addr = addr; - kern_mappings[index].flags = - ARM_VM_PTE_PRESENT; - if(flags & VMMF_UNCACHED) - kern_mappings[index].flags |= ARM_VM_PTE_DEVICE; - else - kern_mappings[index].flags |= - ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE; - if(flags & VMMF_USER) - kern_mappings[index].flags |= ARM_VM_PTE_USER; - else - kern_mappings[index].flags |= ARM_VM_PTE_SUPER; - if(flags & VMMF_WRITE) - kern_mappings[index].flags |= ARM_VM_PTE_RW; - else - kern_mappings[index].flags |= ARM_VM_PTE_RO; - if(addr % ARM_PAGE_SIZE) - panic("VM: addr unaligned: %d", addr); - if(len % ARM_PAGE_SIZE) - panic("VM: len unaligned: %d", len); - vir = offset; - if(sys_vmctl_reply_mapping(index, vir) != OK) - panic("VM: reply failed"); - offset += len; - index++; - kernmappings++; - } - } - - /* Find a PDE below processes available for mapping in the - * page directories. - */ - pagedir_pde = freepde(); - pagedir_pde_val = (page_directories_phys & ARM_VM_PDE_MASK) | - ARM_VM_PDE_PRESENT | ARM_VM_PDE_DOMAIN; - - /* Allright. Now. We have to make our own page directory and page tables, - * that the kernel has already set up, accessible to us. It's easier to - * understand if we just copy all the required pages (i.e. page directory - * and page tables), and set up the pointers as if VM had done it itself. - * - * This allocation will happen without using any page table, and just - * uses spare pages. - */ - newpt = &vmprocess->vm_pt; - if(pt_new(newpt) != OK) - panic("vm pt_new failed"); - - /* Get our current pagedir so we can see it. */ - if(sys_vmctl_get_pdbr(SELF, &myttbr) != OK) - panic("VM: sys_vmctl_get_pdbr failed"); - if(sys_vircopy(NONE, myttbr, SELF, - (vir_bytes) currentpagedir, ARM_PAGEDIR_SIZE) != OK) - panic("VM: sys_vircopy failed"); - - /* We have mapped in kernel ourselves; now copy mappings for VM - * that kernel made, including allocations for BSS. Skip identity - * mapping bits; just map in VM. - */ - for(p = 0; p < ARM_VM_DIR_ENTRIES; p++) { - u32_t entry = currentpagedir[p]; - phys_bytes ptaddr_kern, ptaddr_us; - - /* BIGPAGEs are kernel mapping (do ourselves) or boot - * identity mapping (don't want). - */ - if(!(entry & ARM_VM_PDE_PRESENT)) continue; - if((entry & ARM_VM_BIGPAGE)) continue; - - if(pt_ptalloc(newpt, p, 0) != OK) - panic("pt_ptalloc failed"); - assert(newpt->pt_dir[p] & ARM_VM_PDE_PRESENT); - - ptaddr_kern = entry & ARM_VM_PDE_MASK; - ptaddr_us = newpt->pt_dir[p] & ARM_VM_PDE_MASK; - - /* Copy kernel-initialized pagetable contents into our - * normally accessible pagetable. - */ - if(sys_abscopy(ptaddr_kern, ptaddr_us, ARM_PAGETABLE_SIZE) != OK) - panic("pt_init: abscopy failed"); - } - - /* Inform kernel vm has a newly built page table. */ - assert(vmproc[VM_PROC_NR].vm_endpoint == VM_PROC_NR); - pt_bind(newpt, &vmproc[VM_PROC_NR]); - - pt_init_done = 1; - - /* All OK. */ - return; -} - -/*===========================================================================* - * pt_bind * - *===========================================================================*/ -int pt_bind(pt_t *pt, struct vmproc *who) -{ - int slot; - u32_t phys; - void *pdes; - int i; - int pages_per_pagedir = ARM_PAGEDIR_SIZE/ARM_PAGE_SIZE; - - /* Basic sanity checks. */ - assert(who); - assert(who->vm_flags & VMF_INUSE); - assert(pt); - - assert(pagedir_pde >= 0); - - slot = who->vm_slot; - assert(slot >= 0); - assert(slot < ELEMENTS(vmproc)); - assert(slot < ARM_VM_PT_ENTRIES / pages_per_pagedir); - - phys = pt->pt_dir_phys & ARM_VM_PTE_MASK; - assert(pt->pt_dir_phys == phys); - assert(!(pt->pt_dir_phys % ARM_PAGEDIR_SIZE)); - - /* Update "page directory pagetable." */ - for (i = 0; i < pages_per_pagedir; i++) - page_directories[slot*pages_per_pagedir+i] = - (phys+i*ARM_PAGE_SIZE) | - ARM_VM_PTE_PRESENT | ARM_VM_PTE_RW | - ARM_VM_PTE_USER; - - /* This is where the PDE's will be visible to the kernel - * in its address space. - */ - pdes = (void *) (pagedir_pde*ARM_BIG_PAGE_SIZE + - slot * ARM_PAGEDIR_SIZE); - -#if 0 - printf("VM: slot %d endpoint %d has pde val 0x%lx at kernel address 0x%lx\n", - slot, who->vm_endpoint, page_directories[slot], pdes); -#endif - /* Tell kernel about new page table root. */ - return sys_vmctl_set_addrspace(who->vm_endpoint, pt->pt_dir_phys, pdes); -} - -/*===========================================================================* - * pt_free * - *===========================================================================*/ -void pt_free(pt_t *pt) -{ -/* Free memory associated with this pagetable. */ - int i; - - for(i = 0; i < ARM_VM_DIR_ENTRIES; i++) - if(pt->pt_pt[i]) - vm_freepages((vir_bytes) pt->pt_pt[i], 1); - - return; -} - -/*===========================================================================* - * pt_mapkernel * - *===========================================================================*/ -int pt_mapkernel(pt_t *pt) -{ - int i; - int kern_pde = kern_start_pde; - phys_bytes addr, mapped = 0; - - /* Any ARM page table needs to map in the kernel address space. */ - assert(bigpage_ok); - assert(pagedir_pde >= 0); - assert(kern_pde >= 0); - - /* pt_init() has made sure this is ok. */ - addr = kern_mb_mod->mod_start; - - /* Actually mapping in kernel */ - while(mapped < kern_size) { - pt->pt_dir[kern_pde] = (addr & ARM_VM_PDE_MASK) | - ARM_VM_SECTION | - ARM_VM_SECTION_DOMAIN | ARM_VM_SECTION_WB | - ARM_VM_SECTION_SHAREABLE | ARM_VM_SECTION_SUPER; - kern_pde++; - mapped += ARM_BIG_PAGE_SIZE; - addr += ARM_BIG_PAGE_SIZE; - } - - /* Kernel also wants to know about all page directories. */ - assert(pagedir_pde > kern_pde); - pt->pt_dir[pagedir_pde] = pagedir_pde_val; - - /* Kernel also wants various mappings of its own. */ - for(i = 0; i < kernmappings; i++) { - if(pt_writemap(NULL, pt, - kern_mappings[i].vir_addr, - kern_mappings[i].phys_addr, - kern_mappings[i].len, - kern_mappings[i].flags, 0) != OK) { - panic("pt_mapkernel: pt_writemap failed"); - } - } - - return OK; -} - -/*===========================================================================* - * pt_cycle * - *===========================================================================*/ -void pt_cycle(void) -{ - vm_checkspares(); - vm_checksparedirs(); -} - -int get_vm_self_pages(void) { return vm_self_pages; } diff --git a/servers/vm/arch/arm/pagetable.h b/servers/vm/arch/arm/pagetable.h index f78be1578..b7f0fb911 100644 --- a/servers/vm/arch/arm/pagetable.h +++ b/servers/vm/arch/arm/pagetable.h @@ -7,23 +7,6 @@ #include "vm.h" -/* An ARM pagetable. */ -typedef struct { - /* Directory entries in VM addr space - root of page table. */ - u32_t *pt_dir; /* 16KB aligned (ARM_VM_DIR_ENTRIES) */ - u32_t pt_dir_phys; /* physical address of pt_dir */ - - /* Pointers to page tables in VM address space. */ - u32_t *pt_pt[ARM_VM_DIR_ENTRIES]; - - /* When looking for a hole in virtual address space, start - * looking here. This is in linear addresses, i.e., - * not as the process sees it but the position in the page - * page table. This is just a hint. - */ - u32_t pt_virtop; -} pt_t; - /* Mapping flags. */ #define PTF_WRITE ARM_VM_PTE_RW #define PTF_READ ARM_VM_PTE_RO @@ -35,17 +18,31 @@ typedef struct { #define PTF_CACHEWT ARM_VM_PTE_WT #define PTF_SHARE ARM_VM_PTE_SHAREABLE +#define ARCH_VM_DIR_ENTRIES ARM_VM_DIR_ENTRIES +#define ARCH_BIG_PAGE_SIZE ARM_BIG_PAGE_SIZE +#define ARCH_VM_ADDR_MASK ARM_VM_ADDR_MASK +#define ARCH_VM_PDE_MASK ARM_VM_PDE_MASK +#define ARCH_VM_PDE_PRESENT ARM_VM_PDE_PRESENT +#define ARCH_VM_PTE_PRESENT ARM_VM_PTE_PRESENT +#define ARCH_VM_PTE_USER ARM_VM_PTE_USER +#define ARCH_PAGEDIR_SIZE ARM_PAGEDIR_SIZE +#define ARCH_VM_PTE_RW ARM_VM_PTE_RW +#define ARCH_VM_BIGPAGE ARM_VM_BIGPAGE +#define ARCH_VM_PT_ENTRIES ARM_VM_PT_ENTRIES +#define ARCH_VM_PTE_RO ARM_VM_PTE_RO + /* For arch-specific PT routines to check if no bits outside * the regular flags are set. */ #define PTF_ALLFLAGS (PTF_READ|PTF_WRITE|PTF_PRESENT|PTF_SUPER|PTF_USER|PTF_NOCACHE|PTF_CACHEWB|PTF_CACHEWT|PTF_SHARE) -#if SANITYCHECKS -#define PT_SANE(p) { pt_sanitycheck((p), __FILE__, __LINE__); } -#else -#define PT_SANE(p) -#endif +#define PFERR_PROT(e) ((ARM_VM_PFE_FS(e) == ARM_VM_PFE_L1PERM) \ + || (ARM_VM_PFE_FS(e) == ARM_VM_PFE_L2PERM)) +#define PFERR_NOPAGE(e) (!PFERR_PROT(e)) +#define PFERR_WRITE(e) ((e) & ARM_VM_PFE_W) +#define PFERR_READ(e) (!((e) & ARM_VM_PFE_W)) -#endif +#define VM_PAGE_SIZE ARM_PAGE_SIZE +#endif diff --git a/servers/vm/arch/i386/memory.h b/servers/vm/arch/i386/memory.h deleted file mode 100644 index d72de15bc..000000000 --- a/servers/vm/arch/i386/memory.h +++ /dev/null @@ -1,12 +0,0 @@ -#include - -/* And what is the highest addressable piece of memory, when in paged - * mode? - */ -#define VM_DATATOP kernel_boot_info.user_end -#define VM_STACKTOP kernel_boot_info.user_sp - -#define SLAB_PAGESIZE I386_PAGE_SIZE -#define VM_PAGE_SIZE I386_PAGE_SIZE - -#define CLICKSPERPAGE (I386_PAGE_SIZE/CLICK_SIZE) diff --git a/servers/vm/arch/i386/pagefaults.h b/servers/vm/arch/i386/pagefaults.h deleted file mode 100644 index 4cdc9a61a..000000000 --- a/servers/vm/arch/i386/pagefaults.h +++ /dev/null @@ -1,13 +0,0 @@ - -#ifndef _PAGEFAULTS_H -#define _PAGEFAULTS_H 1 - -#include - -#define PFERR_NOPAGE(e) (!((e) & I386_VM_PFE_P)) -#define PFERR_PROT(e) (((e) & I386_VM_PFE_P)) -#define PFERR_WRITE(e) ((e) & I386_VM_PFE_W) -#define PFERR_READ(e) (!((e) & I386_VM_PFE_W)) - -#endif - diff --git a/servers/vm/arch/i386/pagetable.c b/servers/vm/arch/i386/pagetable.c index 67a21ed4b..424b452e4 100644 --- a/servers/vm/arch/i386/pagetable.c +++ b/servers/vm/arch/i386/pagetable.c @@ -34,20 +34,27 @@ #include "vm.h" #include "sanitycheck.h" -#include "memory.h" - static int vm_self_pages; /* PDE used to map in kernel, kernel physical address. */ static int pagedir_pde = -1; +#if defined(__i386__) static u32_t global_bit = 0, pagedir_pde_val; +#elif defined(__arm__) +static u32_t pagedir_pde_val; +#endif static multiboot_module_t *kern_mb_mod = NULL; static size_t kern_size = 0; static int kern_start_pde = -1; +#if defined(__i386__) /* 4MB page size available in hardware? */ static int bigpage_ok = 0; +#elif defined(__arm__) +/* 1MB page size available in hardware? */ +static int bigpage_ok = 1; +#endif /* Our process table entry. */ struct vmproc *vmprocess = &vmproc[VM_PROC_NR]; @@ -56,12 +63,25 @@ struct vmproc *vmprocess = &vmproc[VM_PROC_NR]; * circular dependency on allocating memory and writing it into VM's * page table. */ +#if defined(__i386__) #if SANITYCHECKS #define SPAREPAGES 100 #define STATIC_SPAREPAGES 90 #else #define SPAREPAGES 15 #define STATIC_SPAREPAGES 10 +#endif +#elif defined(__arm__) +#define SPAREPAGEDIRS 11 +#define STATIC_SPAREPAGEDIRS 10 +#define SPAREPAGES 250 +#define STATIC_SPAREPAGES 100 +int missing_sparedirs = SPAREPAGEDIRS; +static struct { + void *pagedir; + phys_bytes phys; +} sparepagedirs[SPAREPAGEDIRS]; + #endif int missing_spares = SPAREPAGES; static struct { @@ -88,7 +108,7 @@ int kernmappings = 0; * just one page * May as well require them to be equal then. */ -#if CLICK_SIZE != I386_PAGE_SIZE +#if CLICK_SIZE != VM_PAGE_SIZE #error CLICK_SIZE must be page size. #endif @@ -96,9 +116,17 @@ int kernmappings = 0; phys_bytes page_directories_phys; u32_t *page_directories = NULL; -static char static_sparepages[I386_PAGE_SIZE*STATIC_SPAREPAGES] - __aligned(I386_PAGE_SIZE); +#if defined(__i386__) +static char static_sparepages[VM_PAGE_SIZE*STATIC_SPAREPAGES] + __aligned(VM_PAGE_SIZE); +#elif defined(__arm__) +static char static_sparepagedirs[ARCH_PAGEDIR_SIZE*STATIC_SPAREPAGEDIRS + ARCH_PAGEDIR_SIZE] __aligned(ARCH_PAGEDIR_SIZE); +#endif + +#if defined(__arm__) +static char static_sparepages[VM_PAGE_SIZE*STATIC_SPAREPAGES] __aligned(VM_PAGE_SIZE); +#endif #if SANITYCHECKS /*===========================================================================* * pt_sanitycheck * @@ -121,14 +149,18 @@ void pt_sanitycheck(pt_t *pt, char *file, int line) panic("pt_sanitycheck: passed pt not in any proc"); } - MYASSERT(usedpages_add(pt->pt_dir_phys, I386_PAGE_SIZE) == OK); + MYASSERT(usedpages_add(pt->pt_dir_phys, VM_PAGE_SIZE) == OK); } #endif /*===========================================================================* * findhole * *===========================================================================*/ +#if defined(__i386__) static u32_t findhole(void) +#elif defined(__arm__) +static u32_t findhole(int pages) +#endif { /* Find a space in the virtual address space of VM. */ u32_t curv; @@ -136,19 +168,25 @@ static u32_t findhole(void) static u32_t lastv = 0; pt_t *pt = &vmprocess->vm_pt; vir_bytes vmin, vmax; +#if defined(__arm__) + u32_t holev; +#endif - vmin = (vir_bytes) (&_end) & I386_VM_ADDR_MASK; /* marks end of VM BSS */ + vmin = (vir_bytes) (&_end) & ARCH_VM_ADDR_MASK; /* marks end of VM BSS */ vmax = VM_STACKTOP; /* Input sanity check. */ - assert(vmin + I386_PAGE_SIZE >= vmin); - assert(vmax >= vmin + I386_PAGE_SIZE); - assert((vmin % I386_PAGE_SIZE) == 0); - assert((vmax % I386_PAGE_SIZE) == 0); + assert(vmin + VM_PAGE_SIZE >= vmin); + assert(vmax >= vmin + VM_PAGE_SIZE); + assert((vmin % VM_PAGE_SIZE) == 0); + assert((vmax % VM_PAGE_SIZE) == 0); +#if defined(__arm__) + assert(pages > 0); +#endif #if SANITYCHECKS - curv = ((u32_t) random()) % ((vmax - vmin)/I386_PAGE_SIZE); - curv *= I386_PAGE_SIZE; + curv = ((u32_t) random()) % ((vmax - vmin)/VM_PAGE_SIZE); + curv *= VM_PAGE_SIZE; curv += vmin; #else curv = lastv; @@ -160,21 +198,61 @@ static u32_t findhole(void) /* Start looking for a free page starting at vmin. */ while(curv < vmax) { int pte; +#if defined(__arm__) + int i, nohole; +#endif assert(curv >= vmin); assert(curv < vmax); +#if defined(__i386__) pde = I386_VM_PDE(curv); pte = I386_VM_PTE(curv); +#elif defined(__arm__) + holev = curv; /* the candidate hole */ + nohole = 0; + for (i = 0; i < pages && !nohole; ++i) { + if(curv >= vmax) { + break; + } +#endif - if(!(pt->pt_dir[pde] & I386_VM_PRESENT) || - !(pt->pt_pt[pde][pte] & I386_VM_PRESENT)) { +#if defined(__i386__) + if(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT) || + !(pt->pt_pt[pde][pte] & ARCH_VM_PAGE_PRESENT)) { +#elif defined(__arm__) + pde = ARM_VM_PDE(curv); + pte = ARM_VM_PTE(curv); + + /* if page present, no hole */ + if((pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT) && + (pt->pt_pt[pde][pte] & ARCH_VM_PTE_PRESENT)) + nohole = 1; + + /* if not contiguous, no hole */ + if (curv != holev + i * VM_PAGE_SIZE) + nohole = 1; + + curv+=VM_PAGE_SIZE; + } + + /* there's a large enough hole */ + if (!nohole && i == pages) { +#endif lastv = curv; +#if defined(__i386__) return curv; +#elif defined(__arm__) + return holev; +#endif } - curv+=I386_PAGE_SIZE; +#if defined(__i386__) + curv+=VM_PAGE_SIZE; +#elif defined(__arm__) + /* Reset curv */ +#endif if(curv >= vmax && try_restart) { curv = vmin; try_restart = 0; @@ -191,7 +269,7 @@ static u32_t findhole(void) *===========================================================================*/ void vm_freepages(vir_bytes vir, int pages) { - assert(!(vir % I386_PAGE_SIZE)); + assert(!(vir % VM_PAGE_SIZE)); if(is_staticaddr(vir)) { printf("VM: not freeing static page\n"); @@ -199,7 +277,7 @@ void vm_freepages(vir_bytes vir, int pages) } if(pt_writemap(vmprocess, &vmprocess->vm_pt, vir, - MAP_NONE, pages*I386_PAGE_SIZE, 0, + MAP_NONE, pages*VM_PAGE_SIZE, 0, WMF_OVERWRITE | WMF_FREE) != OK) panic("vm_freepages: pt_writemap failed"); @@ -236,6 +314,29 @@ static void *vm_getsparepage(phys_bytes *phys) return NULL; } +#if defined(__arm__) +/*===========================================================================* + * vm_getsparepagedir * + *===========================================================================*/ +static void *vm_getsparepagedir(phys_bytes *phys) +{ + int s; + assert(missing_sparedirs >= 0 && missing_sparedirs <= SPAREPAGEDIRS); + for(s = 0; s < SPAREPAGEDIRS; s++) { + if(sparepagedirs[s].pagedir) { + void *sp; + sp = sparepagedirs[s].pagedir; + *phys = sparepagedirs[s].phys; + sparepagedirs[s].pagedir = NULL; + missing_sparedirs++; + assert(missing_sparedirs >= 0 && missing_sparedirs <= SPAREPAGEDIRS); + return sp; + } + } + return NULL; +} +#endif + /*===========================================================================* * vm_checkspares * *===========================================================================*/ @@ -262,6 +363,34 @@ static void *vm_checkspares(void) return NULL; } +#if defined(__arm__) +/*===========================================================================* + * vm_checksparedirs * + *===========================================================================*/ +static void *vm_checksparedirs(void) +{ + int s, n = 0; + static int total = 0, worst = 0; + assert(missing_sparedirs >= 0 && missing_sparedirs <= SPAREPAGEDIRS); + for(s = 0; s < SPAREPAGEDIRS && missing_sparedirs > 0; s++) + if(!sparepagedirs[s].pagedir) { + n++; + if((sparepagedirs[s].pagedir = vm_allocpage(&sparepagedirs[s].phys, + VMP_SPARE))) { + missing_sparedirs--; + assert(missing_sparedirs >= 0); + assert(missing_sparedirs <= SPAREPAGEDIRS); + } else { + printf("VM: warning: couldn't get new spare pagedir\n"); + } + } + if(worst < n) worst = n; + total += n; + + return NULL; +} + +#endif static int pt_init_done; /*===========================================================================* @@ -276,6 +405,9 @@ void *vm_allocpage(phys_bytes *phys, int reason) int r; static int level = 0; void *ret; +#if defined(__arm__) + u32_t mem_bytes, mem_clicks, mem_flags; +#endif pt = &vmprocess->vm_pt; assert(reason >= 0 && reason < VMP_CATEGORIES); @@ -285,9 +417,22 @@ void *vm_allocpage(phys_bytes *phys, int reason) assert(level >= 1); assert(level <= 2); +#if defined(__i386__) if((level > 1) || !pt_init_done) { +#elif defined(__arm__) + if(level > 1 || !pt_init_done) { +#endif void *s; +#if defined(__i386__) s=vm_getsparepage(phys); +#elif defined(__arm__) + + if (reason == VMP_PAGEDIR) + s=vm_getsparepagedir(phys); + else + s=vm_getsparepage(phys); + +#endif level--; if(!s) { util_stacktrace(); @@ -297,10 +442,25 @@ void *vm_allocpage(phys_bytes *phys, int reason) return s; } +#if defined(__arm__) + if (reason == VMP_PAGEDIR) { + mem_bytes = ARCH_PAGEDIR_SIZE; + mem_flags = PAF_ALIGN16K; + } else { + mem_bytes = VM_PAGE_SIZE; + mem_flags = 0; + } + mem_clicks = mem_bytes / VM_PAGE_SIZE * CLICKSPERPAGE; + +#endif /* VM does have a pagetable, so get a page and map it in there. * Where in our virtual address space can we put it? */ +#if defined(__i386__) loc = findhole(); +#elif defined(__arm__) + loc = findhole(mem_bytes / VM_PAGE_SIZE); +#endif if(loc == NO_MEM) { level--; printf("VM: vm_allocpage: findhole failed\n"); @@ -310,7 +470,11 @@ void *vm_allocpage(phys_bytes *phys, int reason) /* Allocate page of memory for use by VM. As VM * is trusted, we don't have to pre-clear it. */ +#if defined(__i386__) if((newpage = alloc_mem(CLICKSPERPAGE, 0)) == NO_MEM) { +#elif defined(__arm__) + if((newpage = alloc_mem(mem_clicks, mem_flags)) == NO_MEM) { +#endif level--; printf("VM: vm_allocpage: alloc_mem failed\n"); return NULL; @@ -319,9 +483,16 @@ void *vm_allocpage(phys_bytes *phys, int reason) *phys = CLICK2ABS(newpage); /* Map this page into our address space. */ - if((r=pt_writemap(vmprocess, pt, loc, *phys, I386_PAGE_SIZE, - I386_VM_PRESENT | I386_VM_USER | I386_VM_WRITE, 0)) != OK) { +#if defined(__i386__) + if((r=pt_writemap(vmprocess, pt, loc, *phys, VM_PAGE_SIZE, + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW, 0)) != OK) { free_mem(newpage, CLICKSPERPAGE); +#elif defined(__arm__) + if((r=pt_writemap(vmprocess, pt, loc, *phys, mem_bytes, + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW | + ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE, 0)) != OK) { + free_mem(newpage, mem_clicks); +#endif printf("vm_allocpage writemap failed\n"); level--; return NULL; @@ -348,18 +519,23 @@ void vm_pagelock(void *vir, int lockflag) /* Mark a page allocated by vm_allocpage() unwritable, i.e. only for VM. */ vir_bytes m = (vir_bytes) vir; int r; - u32_t flags = I386_VM_PRESENT | I386_VM_USER; + u32_t flags = ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER; pt_t *pt; pt = &vmprocess->vm_pt; - assert(!(m % I386_PAGE_SIZE)); + assert(!(m % VM_PAGE_SIZE)); if(!lockflag) - flags |= I386_VM_WRITE; + flags |= ARCH_VM_PTE_RW; +#if defined(__arm__) + else + flags |= ARCH_VM_PTE_RO; + flags |= ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE; +#endif /* Update flags. */ - if((r=pt_writemap(vmprocess, pt, m, 0, I386_PAGE_SIZE, + if((r=pt_writemap(vmprocess, pt, m, 0, VM_PAGE_SIZE, flags, WMF_OVERWRITE | WMF_WRITEFLAGSONLY)) != OK) { panic("vm_lockpage: pt_writemap failed"); } @@ -380,29 +556,42 @@ int vm_addrok(void *vir, int writeflag) int pde, pte; vir_bytes v = (vir_bytes) vir; +#if defined(__i386__) pde = I386_VM_PDE(v); pte = I386_VM_PTE(v); +#elif defined(__arm__) + pde = ARM_VM_PDE(v); + pte = ARM_VM_PTE(v); +#endif - if(!(pt->pt_dir[pde] & I386_VM_PRESENT)) { + if(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT)) { printf("addr not ok: missing pde %d\n", pde); return 0; } +#if defined(__i386__) if(writeflag && - !(pt->pt_dir[pde] & I386_VM_WRITE)) { + !(pt->pt_dir[pde] & ARCH_VM_PTE_RW)) { printf("addr not ok: pde %d present but pde unwritable\n", pde); return 0; } - if(!(pt->pt_pt[pde][pte] & I386_VM_PRESENT)) { +#endif + if(!(pt->pt_pt[pde][pte] & ARCH_VM_PTE_PRESENT)) { printf("addr not ok: missing pde %d / pte %d\n", pde, pte); return 0; } +#if defined(__i386__) if(writeflag && - !(pt->pt_pt[pde][pte] & I386_VM_WRITE)) { + !(pt->pt_pt[pde][pte] & ARCH_VM_PTE_RW)) { printf("addr not ok: pde %d / pte %d present but unwritable\n", +#elif defined(__arm__) + if(!writeflag && + !(pt->pt_pt[pde][pte] & ARCH_VM_PTE_RO)) { + printf("addr not ok: pde %d / pte %d present but writable\n", +#endif pde, pte); return 0; } @@ -420,28 +609,33 @@ static int pt_ptalloc(pt_t *pt, int pde, u32_t flags) phys_bytes pt_phys; /* Argument must make sense. */ - assert(pde >= 0 && pde < I386_VM_DIR_ENTRIES); + assert(pde >= 0 && pde < ARCH_VM_DIR_ENTRIES); assert(!(flags & ~(PTF_ALLFLAGS))); /* We don't expect to overwrite page directory entry, nor * storage for the page table. */ - assert(!(pt->pt_dir[pde] & I386_VM_PRESENT)); + assert(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT)); assert(!pt->pt_pt[pde]); /* Get storage for the page table. */ if(!(pt->pt_pt[pde] = vm_allocpage(&pt_phys, VMP_PAGETABLE))) return ENOMEM; - for(i = 0; i < I386_VM_PT_ENTRIES; i++) + for(i = 0; i < ARCH_VM_PT_ENTRIES; i++) pt->pt_pt[pde][i] = 0; /* Empty entry. */ /* Make page directory entry. * The PDE is always 'present,' 'writable,' and 'user accessible,' * relying on the PTE for protection. */ - pt->pt_dir[pde] = (pt_phys & I386_VM_ADDR_MASK) | flags - | I386_VM_PRESENT | I386_VM_USER | I386_VM_WRITE; +#if defined(__i386__) + pt->pt_dir[pde] = (pt_phys & ARCH_VM_ADDR_MASK) | flags + | ARCH_VM_PDE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW; +#elif defined(__arm__) + pt->pt_dir[pde] = (pt_phys & ARCH_VM_PDE_MASK) + | ARCH_VM_PDE_PRESENT | ARM_VM_PDE_DOMAIN; +#endif return OK; } @@ -455,15 +649,20 @@ int pt_ptalloc_in_range(pt_t *pt, vir_bytes start, vir_bytes end, /* Allocate all the page tables in the range specified. */ int pde, first_pde, last_pde; +#if defined(__i386__) first_pde = I386_VM_PDE(start); last_pde = I386_VM_PDE(end-1); +#elif defined(__arm__) + first_pde = ARM_VM_PDE(start); + last_pde = ARM_VM_PDE(end-1); +#endif assert(first_pde >= 0); - assert(last_pde < I386_VM_DIR_ENTRIES); + assert(last_pde < ARCH_VM_DIR_ENTRIES); /* Scan all page-directory entries in the range. */ for(pde = first_pde; pde <= last_pde; pde++) { - assert(!(pt->pt_dir[pde] & I386_VM_BIGPAGE)); - if(!(pt->pt_dir[pde] & I386_VM_PRESENT)) { + assert(!(pt->pt_dir[pde] & ARCH_VM_BIGPAGE)); + if(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT)) { int r; if(verify) { printf("pt_ptalloc_in_range: no pde %d\n", pde); @@ -482,7 +681,7 @@ int pt_ptalloc_in_range(pt_t *pt, vir_bytes start, vir_bytes end, } } assert(pt->pt_dir[pde]); - assert(pt->pt_dir[pde] & I386_VM_PRESENT); + assert(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT); } return OK; @@ -495,12 +694,21 @@ static char *ptestr(u32_t pte) } static char str[30]; - if(!(pte & I386_VM_PRESENT)) { + if(!(pte & ARCH_VM_PTE_PRESENT)) { return "not present"; } str[0] = '\0'; - FLAG(I386_VM_WRITE, "W"); - FLAG(I386_VM_USER, "U"); +#if defined(__i386__) + FLAG(ARCH_VM_PTE_RW, "W"); +#elif defined(__arm__) + if(pte & ARCH_VM_PTE_RO) { + strcat(str, "R "); + } else { + strcat(str, "W "); + } +#endif + FLAG(ARCH_VM_PTE_USER, "U"); +#if defined(__i386__) FLAG(I386_VM_PWT, "PWT"); FLAG(I386_VM_PCD, "PCD"); FLAG(I386_VM_ACC, "ACC"); @@ -510,6 +718,12 @@ static char *ptestr(u32_t pte) FLAG(I386_VM_PTAVAIL1, "AV1"); FLAG(I386_VM_PTAVAIL2, "AV2"); FLAG(I386_VM_PTAVAIL3, "AV3"); +#elif defined(__arm__) + FLAG(ARM_VM_PTE_SUPER, "S"); + FLAG(ARM_VM_PTE_SHAREABLE, "SH"); + FLAG(ARM_VM_PTE_WB, "WB"); + FLAG(ARM_VM_PTE_WT, "WT"); +#endif return str; } @@ -531,28 +745,46 @@ int pt_map_in_range(struct vmproc *src_vmp, struct vmproc *dst_vmp, dst_pt = &dst_vmp->vm_pt; end = end ? end : VM_DATATOP; - assert(start % I386_PAGE_SIZE == 0); - assert(end % I386_PAGE_SIZE == 0); + assert(start % VM_PAGE_SIZE == 0); + assert(end % VM_PAGE_SIZE == 0); +#if defined(__i386__) assert(start <= end); - assert(I386_VM_PDE(end) < I386_VM_DIR_ENTRIES); + assert(I386_VM_PDE(end) < ARCH_VM_DIR_ENTRIES); +#elif defined(__arm__) + assert(ARM_VM_PDE(start) >= 0 && start <= end); + assert(ARM_VM_PDE(end) < ARCH_VM_DIR_ENTRIES); +#endif #if LU_DEBUG printf("VM: pt_map_in_range: src = %d, dst = %d\n", src_vmp->vm_endpoint, dst_vmp->vm_endpoint); printf("VM: pt_map_in_range: transferring from 0x%08x (pde %d pte %d) to 0x%08x (pde %d pte %d)\n", +#if defined(__i386__) start, I386_VM_PDE(start), I386_VM_PTE(start), end, I386_VM_PDE(end), I386_VM_PTE(end)); +#elif defined(__arm__) + start, ARM_VM_PDE(start), ARM_VM_PTE(start), + end, ARM_VM_PDE(end), ARM_VM_PTE(end)); +#endif #endif /* Scan all page-table entries in the range. */ - for(viraddr = start; viraddr <= end; viraddr += I386_PAGE_SIZE) { + for(viraddr = start; viraddr <= end; viraddr += VM_PAGE_SIZE) { +#if defined(__i386__) pde = I386_VM_PDE(viraddr); - if(!(pt->pt_dir[pde] & I386_VM_PRESENT)) { +#elif defined(__arm__) + pde = ARM_VM_PDE(viraddr); +#endif + if(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT)) { if(viraddr == VM_DATATOP) break; continue; } +#if defined(__i386__) pte = I386_VM_PTE(viraddr); - if(!(pt->pt_pt[pde][pte] & I386_VM_PRESENT)) { +#elif defined(__arm__) + pte = ARM_VM_PTE(viraddr); +#endif + if(!(pt->pt_pt[pde][pte] & ARCH_VM_PTE_PRESENT)) { if(viraddr == VM_DATATOP) break; continue; } @@ -589,9 +821,15 @@ int pt_ptmap(struct vmproc *src_vmp, struct vmproc *dst_vmp) /* Transfer mapping to the page directory. */ viraddr = (vir_bytes) pt->pt_dir; - physaddr = pt->pt_dir_phys & I386_VM_ADDR_MASK; - if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, I386_PAGE_SIZE, - I386_VM_PRESENT | I386_VM_USER | I386_VM_WRITE, + physaddr = pt->pt_dir_phys & ARCH_VM_ADDR_MASK; +#if defined(__i386__) + if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, VM_PAGE_SIZE, + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW, +#elif defined(__arm__) + if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, ARCH_PAGEDIR_SIZE, + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW | + ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE, +#endif WMF_OVERWRITE)) != OK) { return r; } @@ -601,16 +839,25 @@ int pt_ptmap(struct vmproc *src_vmp, struct vmproc *dst_vmp) #endif /* Scan all non-reserved page-directory entries. */ - for(pde=0; pde < I386_VM_DIR_ENTRIES; pde++) { - if(!(pt->pt_dir[pde] & I386_VM_PRESENT)) { + for(pde=0; pde < ARCH_VM_DIR_ENTRIES; pde++) { + if(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT)) { continue; } /* Transfer mapping to the page table. */ viraddr = (vir_bytes) pt->pt_pt[pde]; - physaddr = pt->pt_dir[pde] & I386_VM_ADDR_MASK; - if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, I386_PAGE_SIZE, - I386_VM_PRESENT | I386_VM_USER | I386_VM_WRITE, +#if defined(__i386__) + physaddr = pt->pt_dir[pde] & ARCH_VM_ADDR_MASK; +#elif defined(__arm__) + physaddr = pt->pt_dir[pde] & ARCH_VM_PDE_MASK; +#endif + if((r=pt_writemap(dst_vmp, &dst_vmp->vm_pt, viraddr, physaddr, VM_PAGE_SIZE, +#if defined(__i386__) + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW, +#elif defined(__arm__) + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_USER | ARCH_VM_PTE_RW | + ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE, +#endif WMF_OVERWRITE)) != OK) { return r; } @@ -663,23 +910,23 @@ int pt_writemap(struct vmproc * vmp, if(writemapflags & WMF_VERIFY) verify = 1; - assert(!(bytes % I386_PAGE_SIZE)); + assert(!(bytes % VM_PAGE_SIZE)); assert(!(flags & ~(PTF_ALLFLAGS))); - pages = bytes / I386_PAGE_SIZE; + pages = bytes / VM_PAGE_SIZE; /* MAP_NONE means to clear the mapping. It doesn't matter - * what's actually written into the PTE if I386_VM_PRESENT + * what's actually written into the PTE if PRESENT * isn't on, so we can just write MAP_NONE into it. */ - assert(physaddr == MAP_NONE || (flags & I386_VM_PRESENT)); + assert(physaddr == MAP_NONE || (flags & ARCH_VM_PTE_PRESENT)); assert(physaddr != MAP_NONE || !flags); /* First make sure all the necessary page tables are allocated, * before we start writing in any of them, because it's a pain * to undo our work properly. */ - ret = pt_ptalloc_in_range(pt, v, v + I386_PAGE_SIZE*pages, flags, verify); + ret = pt_ptalloc_in_range(pt, v, v + VM_PAGE_SIZE*pages, flags, verify); if(ret != OK) { printf("VM: writemap: pt_ptalloc_in_range failed\n"); goto resume_exit; @@ -688,18 +935,23 @@ int pt_writemap(struct vmproc * vmp, /* Now write in them. */ for(p = 0; p < pages; p++) { u32_t entry; +#if defined(__i386__) int pde = I386_VM_PDE(v); int pte = I386_VM_PTE(v); +#elif defined(__arm__) + int pde = ARM_VM_PDE(v); + int pte = ARM_VM_PTE(v); +#endif - assert(!(v % I386_PAGE_SIZE)); - assert(pte >= 0 && pte < I386_VM_PT_ENTRIES); - assert(pde >= 0 && pde < I386_VM_DIR_ENTRIES); + assert(!(v % VM_PAGE_SIZE)); + assert(pte >= 0 && pte < ARCH_VM_PT_ENTRIES); + assert(pde >= 0 && pde < ARCH_VM_DIR_ENTRIES); /* Page table has to be there. */ - assert(pt->pt_dir[pde] & I386_VM_PRESENT); + assert(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT); /* We do not expect it to be a bigpage. */ - assert(!(pt->pt_dir[pde] & I386_VM_BIGPAGE)); + assert(!(pt->pt_dir[pde] & ARCH_VM_BIGPAGE)); /* Make sure page directory entry for this page table * is marked present and page table entry is available. @@ -709,10 +961,14 @@ int pt_writemap(struct vmproc * vmp, #if SANITYCHECKS /* We don't expect to overwrite a page. */ if(!(writemapflags & (WMF_OVERWRITE|WMF_VERIFY))) - assert(!(pt->pt_pt[pde][pte] & I386_VM_PRESENT)); + assert(!(pt->pt_pt[pde][pte] & ARCH_VM_PTE_PRESENT)); #endif if(writemapflags & (WMF_WRITEFLAGSONLY|WMF_FREE)) { - physaddr = pt->pt_pt[pde][pte] & I386_VM_ADDR_MASK; +#if defined(__i386__) + physaddr = pt->pt_pt[pde][pte] & ARCH_VM_ADDR_MASK; +#elif defined(__arm__) + physaddr = pt->pt_pt[pde][pte] & ARM_VM_PTE_MASK; +#endif } if(writemapflags & WMF_FREE) { @@ -720,21 +976,32 @@ int pt_writemap(struct vmproc * vmp, } /* Entry we will write. */ - entry = (physaddr & I386_VM_ADDR_MASK) | flags; +#if defined(__i386__) + entry = (physaddr & ARCH_VM_ADDR_MASK) | flags; +#elif defined(__arm__) + entry = (physaddr & ARM_VM_PTE_MASK) | flags; +#endif if(verify) { u32_t maskedentry; maskedentry = pt->pt_pt[pde][pte]; +#if defined(__i386__) maskedentry &= ~(I386_VM_ACC|I386_VM_DIRTY); +#endif /* Verify pagetable entry. */ - if(entry & I386_VM_WRITE) { + if(entry & ARCH_VM_PTE_RW) { /* If we expect a writable page, allow a readonly page. */ - maskedentry |= I386_VM_WRITE; + maskedentry |= ARCH_VM_PTE_RW; } if(maskedentry != entry) { printf("pt_writemap: mismatch: "); - if((entry & I386_VM_ADDR_MASK) != - (maskedentry & I386_VM_ADDR_MASK)) { +#if defined(__i386__) + if((entry & ARCH_VM_ADDR_MASK) != + (maskedentry & ARCH_VM_ADDR_MASK)) { +#elif defined(__arm__) + if((entry & ARM_VM_PTE_MASK) != + (maskedentry & ARM_VM_PTE_MASK)) { +#endif printf("pt_writemap: physaddr mismatch (0x%lx, 0x%lx); ", (long)entry, (long)maskedentry); } else printf("phys ok; "); @@ -751,8 +1018,8 @@ int pt_writemap(struct vmproc * vmp, pt->pt_pt[pde][pte] = entry; } - physaddr += I386_PAGE_SIZE; - v += I386_PAGE_SIZE; + physaddr += VM_PAGE_SIZE; + v += VM_PAGE_SIZE; } resume_exit: @@ -776,36 +1043,45 @@ int pt_checkrange(pt_t *pt, vir_bytes v, size_t bytes, { int p, pages; - assert(!(bytes % I386_PAGE_SIZE)); + assert(!(bytes % VM_PAGE_SIZE)); - pages = bytes / I386_PAGE_SIZE; + pages = bytes / VM_PAGE_SIZE; for(p = 0; p < pages; p++) { +#if defined(__i386__) int pde = I386_VM_PDE(v); int pte = I386_VM_PTE(v); +#elif defined(__arm__) + int pde = ARM_VM_PDE(v); + int pte = ARM_VM_PTE(v); +#endif - assert(!(v % I386_PAGE_SIZE)); - assert(pte >= 0 && pte < I386_VM_PT_ENTRIES); - assert(pde >= 0 && pde < I386_VM_DIR_ENTRIES); + assert(!(v % VM_PAGE_SIZE)); + assert(pte >= 0 && pte < ARCH_VM_PT_ENTRIES); + assert(pde >= 0 && pde < ARCH_VM_DIR_ENTRIES); /* Page table has to be there. */ - if(!(pt->pt_dir[pde] & I386_VM_PRESENT)) + if(!(pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT)) return EFAULT; /* Make sure page directory entry for this page table * is marked present and page table entry is available. */ - assert((pt->pt_dir[pde] & I386_VM_PRESENT) && pt->pt_pt[pde]); + assert((pt->pt_dir[pde] & ARCH_VM_PDE_PRESENT) && pt->pt_pt[pde]); - if(!(pt->pt_pt[pde][pte] & I386_VM_PRESENT)) { + if(!(pt->pt_pt[pde][pte] & ARCH_VM_PTE_PRESENT)) { return EFAULT; } - if(write && !(pt->pt_pt[pde][pte] & I386_VM_WRITE)) { +#if defined(__i386__) + if(write && !(pt->pt_pt[pde][pte] & ARCH_VM_PTE_RW)) { +#elif defined(__arm__) + if(write && (pt->pt_pt[pde][pte] & ARCH_VM_PTE_RO)) { +#endif return EFAULT; } - v += I386_PAGE_SIZE; + v += VM_PAGE_SIZE; } return OK; @@ -816,7 +1092,7 @@ int pt_checkrange(pt_t *pt, vir_bytes v, size_t bytes, *===========================================================================*/ int pt_new(pt_t *pt) { -/* Allocate a pagetable root. On i386, allocate a page-aligned page directory +/* Allocate a pagetable root. Allocate a page-aligned page directory * and set them to 0 (indicating no page tables are allocated). Lookup * its physical address as we'll need that in the future. Verify it's * page-aligned. @@ -833,9 +1109,12 @@ int pt_new(pt_t *pt) !(pt->pt_dir = vm_allocpage((phys_bytes *)&pt->pt_dir_phys, VMP_PAGEDIR))) { return ENOMEM; } +#if defined(__arm__) + assert(!((u32_t)pt->pt_dir_phys % ARCH_PAGEDIR_SIZE)); +#endif - for(i = 0; i < I386_VM_DIR_ENTRIES; i++) { - pt->pt_dir[i] = 0; /* invalid entry (I386_VM_PRESENT bit = 0) */ + for(i = 0; i < ARCH_VM_DIR_ENTRIES; i++) { + pt->pt_dir[i] = 0; /* invalid entry (PRESENT bit = 0) */ pt->pt_pt[i] = NULL; } @@ -852,7 +1131,7 @@ int pt_new(pt_t *pt) static int freepde(void) { int p = kernel_boot_info.freepde_start++; - assert(kernel_boot_info.freepde_start < I386_VM_DIR_ENTRIES); + assert(kernel_boot_info.freepde_start < ARCH_VM_DIR_ENTRIES); return p; } @@ -863,11 +1142,20 @@ void pt_init(void) { pt_t *newpt; int s, r, p; +#if defined(__i386__) int global_bit_ok = 0; +#endif vir_bytes sparepages_mem; - static u32_t currentpagedir[I386_VM_DIR_ENTRIES]; +#if defined(__arm__) + vir_bytes sparepagedirs_mem; +#endif + static u32_t currentpagedir[ARCH_VM_DIR_ENTRIES]; int m = kernel_boot_info.kern_mod; +#if defined(__i386__) u32_t mypdbr; /* Page Directory Base Register (cr3) value */ +#elif defined(__arm__) + u32_t myttbr; +#endif /* Find what the physical location of the kernel is. */ assert(m >= 0); @@ -875,30 +1163,62 @@ void pt_init(void) assert(kernel_boot_info.mods_with_kernel < MULTIBOOT_MAX_MODS); kern_mb_mod = &kernel_boot_info.module_list[m]; kern_size = kern_mb_mod->mod_end - kern_mb_mod->mod_start; - assert(!(kern_mb_mod->mod_start % I386_BIG_PAGE_SIZE)); - assert(!(kernel_boot_info.vir_kern_start % I386_BIG_PAGE_SIZE)); - kern_start_pde = kernel_boot_info.vir_kern_start / I386_BIG_PAGE_SIZE; + assert(!(kern_mb_mod->mod_start % ARCH_BIG_PAGE_SIZE)); + assert(!(kernel_boot_info.vir_kern_start % ARCH_BIG_PAGE_SIZE)); + kern_start_pde = kernel_boot_info.vir_kern_start / ARCH_BIG_PAGE_SIZE; /* Get ourselves spare pages. */ sparepages_mem = (vir_bytes) static_sparepages; - assert(!(sparepages_mem % I386_PAGE_SIZE)); + assert(!(sparepages_mem % VM_PAGE_SIZE)); + +#if defined(__arm__) + /* Get ourselves spare pagedirs. */ + sparepagedirs_mem = (vir_bytes) static_sparepagedirs; + assert(!(sparepagedirs_mem % ARCH_PAGEDIR_SIZE)); +#endif /* Spare pages are used to allocate memory before VM has its own page * table that things (i.e. arbitrary physical memory) can be mapped into. * We get it by pre-allocating it in our bss (allocated and mapped in by * the kernel) in static_sparepages. We also need the physical addresses * though; we look them up now so they are ready for use. */ +#if defined(__arm__) + missing_sparedirs = 0; + assert(STATIC_SPAREPAGEDIRS < SPAREPAGEDIRS); + for(s = 0; s < SPAREPAGEDIRS; s++) { + vir_bytes v = (sparepagedirs_mem + s*ARCH_PAGEDIR_SIZE);; + phys_bytes ph; + if((r=sys_umap(SELF, VM_D, (vir_bytes) v, + ARCH_PAGEDIR_SIZE, &ph)) != OK) + panic("pt_init: sys_umap failed: %d", r); + if(s >= STATIC_SPAREPAGEDIRS) { + sparepagedirs[s].pagedir = NULL; + missing_sparedirs++; + continue; + } + sparepagedirs[s].pagedir = (void *) v; + sparepagedirs[s].phys = ph; + } +#endif missing_spares = 0; assert(STATIC_SPAREPAGES < SPAREPAGES); for(s = 0; s < SPAREPAGES; s++) { - vir_bytes v = (sparepages_mem + s*I386_PAGE_SIZE);; + vir_bytes v = (sparepages_mem + s*VM_PAGE_SIZE);; phys_bytes ph; +#if defined(__i386__) if((r=sys_umap(SELF, VM_D, (vir_bytes) v, - I386_PAGE_SIZE*SPAREPAGES, &ph)) != OK) +#elif defined(__arm__) + if((r=sys_umap(SELF, VM_D, (vir_bytes) v, +#endif + VM_PAGE_SIZE*SPAREPAGES, &ph)) != OK) panic("pt_init: sys_umap failed: %d", r); +#if defined(__i386__) if(s >= STATIC_SPAREPAGES) { +#elif defined(__arm__) + if(s >= STATIC_SPAREPAGES) { +#endif sparepages[s].page = NULL; missing_spares++; continue; @@ -907,14 +1227,21 @@ void pt_init(void) sparepages[s].phys = ph; } +#if defined(__i386__) /* global bit and 4MB pages available? */ global_bit_ok = _cpufeature(_CPUF_I386_PGE); bigpage_ok = _cpufeature(_CPUF_I386_PSE); +#elif defined(__arm__) + /* 1MB pages available? */ + bigpage_ok = 1; +#endif +#if defined(__i386__) /* Set bit for PTE's and PDE's if available. */ if(global_bit_ok) global_bit = I386_VM_GLOBAL; +#endif /* Allocate us a page table in which to remember page directory * pointers. */ @@ -922,7 +1249,7 @@ void pt_init(void) VMP_PAGETABLE))) panic("no virt addr for vm mappings"); - memset(page_directories, 0, I386_PAGE_SIZE); + memset(page_directories, 0, VM_PAGE_SIZE); /* Now reserve another pde for kernel's own mappings. */ { @@ -932,7 +1259,7 @@ void pt_init(void) u32_t offset = 0; kernmap_pde = freepde(); - offset = kernmap_pde * I386_BIG_PAGE_SIZE; + offset = kernmap_pde * ARCH_BIG_PAGE_SIZE; while(sys_vmctl_get_mapping(index, &addr, &len, &flags) == OK) { @@ -942,20 +1269,40 @@ void pt_init(void) kern_mappings[index].phys_addr = addr; kern_mappings[index].len = len; kern_mappings[index].flags = flags; +#if defined(__i386__) kern_mappings[index].vir_addr = offset; +#elif defined(__arm__) + kern_mappings[index].vir_addr = addr; +#endif kern_mappings[index].flags = - I386_VM_PRESENT; + ARCH_VM_PTE_PRESENT; if(flags & VMMF_UNCACHED) +#if defined(__i386__) kern_mappings[index].flags |= PTF_NOCACHE; +#elif defined(__arm__) + kern_mappings[index].flags |= ARM_VM_PTE_DEVICE; + else + kern_mappings[index].flags |= + ARM_VM_PTE_WB | ARM_VM_PTE_SHAREABLE; +#endif if(flags & VMMF_USER) - kern_mappings[index].flags |= I386_VM_USER; + kern_mappings[index].flags |= ARCH_VM_PTE_USER; +#if defined(__arm__) + else + kern_mappings[index].flags |= ARM_VM_PTE_SUPER; +#endif if(flags & VMMF_WRITE) - kern_mappings[index].flags |= I386_VM_WRITE; + kern_mappings[index].flags |= ARCH_VM_PTE_RW; +#if defined(__i386__) if(flags & VMMF_GLO) kern_mappings[index].flags |= I386_VM_GLOBAL; - if(addr % I386_PAGE_SIZE) +#elif defined(__arm__) + else + kern_mappings[index].flags |= ARCH_VM_PTE_RO; +#endif + if(addr % VM_PAGE_SIZE) panic("VM: addr unaligned: %d", addr); - if(len % I386_PAGE_SIZE) + if(len % VM_PAGE_SIZE) panic("VM: len unaligned: %d", len); vir = offset; if(sys_vmctl_reply_mapping(index, vir) != OK) @@ -970,8 +1317,13 @@ void pt_init(void) * page directories. */ pagedir_pde = freepde(); - pagedir_pde_val = (page_directories_phys & I386_VM_ADDR_MASK) | - I386_VM_PRESENT | I386_VM_WRITE; +#if defined(__i386__) + pagedir_pde_val = (page_directories_phys & ARCH_VM_ADDR_MASK) | + ARCH_VM_PDE_PRESENT | ARCH_VM_PTE_RW; +#elif defined(__arm__) + pagedir_pde_val = (page_directories_phys & ARCH_VM_PDE_MASK) | + ARCH_VM_PDE_PRESENT | ARM_VM_PDE_DOMAIN; +#endif /* Allright. Now. We have to make our own page directory and page tables, * that the kernel has already set up, accessible to us. It's easier to @@ -986,37 +1338,55 @@ void pt_init(void) panic("vm pt_new failed"); /* Get our current pagedir so we can see it. */ +#if defined(__i386__) if(sys_vmctl_get_pdbr(SELF, &mypdbr) != OK) +#elif defined(__arm__) + if(sys_vmctl_get_pdbr(SELF, &myttbr) != OK) +#endif panic("VM: sys_vmctl_get_pdbr failed"); +#if defined(__i386__) if(sys_vircopy(NONE, mypdbr, SELF, - (vir_bytes) currentpagedir, I386_PAGE_SIZE) != OK) + (vir_bytes) currentpagedir, VM_PAGE_SIZE) != OK) +#elif defined(__arm__) + if(sys_vircopy(NONE, myttbr, SELF, + (vir_bytes) currentpagedir, ARCH_PAGEDIR_SIZE) != OK) +#endif panic("VM: sys_vircopy failed"); /* We have mapped in kernel ourselves; now copy mappings for VM * that kernel made, including allocations for BSS. Skip identity * mapping bits; just map in VM. */ - for(p = 0; p < I386_VM_DIR_ENTRIES; p++) { + for(p = 0; p < ARCH_VM_DIR_ENTRIES; p++) { u32_t entry = currentpagedir[p]; phys_bytes ptaddr_kern, ptaddr_us; /* BIGPAGEs are kernel mapping (do ourselves) or boot * identity mapping (don't want). */ - if(!(entry & I386_VM_PRESENT)) continue; - if((entry & I386_VM_BIGPAGE)) continue; + if(!(entry & ARCH_VM_PDE_PRESENT)) continue; + if((entry & ARCH_VM_BIGPAGE)) continue; if(pt_ptalloc(newpt, p, 0) != OK) panic("pt_ptalloc failed"); - assert(newpt->pt_dir[p] & I386_VM_PRESENT); - - ptaddr_kern = entry & I386_VM_ADDR_MASK; - ptaddr_us = newpt->pt_dir[p] & I386_VM_ADDR_MASK; + assert(newpt->pt_dir[p] & ARCH_VM_PDE_PRESENT); + +#if defined(__i386__) + ptaddr_kern = entry & ARCH_VM_ADDR_MASK; + ptaddr_us = newpt->pt_dir[p] & ARCH_VM_ADDR_MASK; +#elif defined(__arm__) + ptaddr_kern = entry & ARCH_VM_PDE_MASK; + ptaddr_us = newpt->pt_dir[p] & ARCH_VM_PDE_MASK; +#endif /* Copy kernel-initialized pagetable contents into our * normally accessible pagetable. */ - if(sys_abscopy(ptaddr_kern, ptaddr_us, I386_PAGE_SIZE) != OK) +#if defined(__i386__) + if(sys_abscopy(ptaddr_kern, ptaddr_us, VM_PAGE_SIZE) != OK) +#elif defined(__arm__) + if(sys_abscopy(ptaddr_kern, ptaddr_us, ARM_PAGETABLE_SIZE) != OK) +#endif panic("pt_init: abscopy failed"); } @@ -1038,6 +1408,10 @@ int pt_bind(pt_t *pt, struct vmproc *who) int slot; u32_t phys; void *pdes; +#if defined(__arm__) + int i; + int pages_per_pagedir = ARCH_PAGEDIR_SIZE/VM_PAGE_SIZE; +#endif /* Basic sanity checks. */ assert(who); @@ -1049,19 +1423,42 @@ int pt_bind(pt_t *pt, struct vmproc *who) slot = who->vm_slot; assert(slot >= 0); assert(slot < ELEMENTS(vmproc)); - assert(slot < I386_VM_PT_ENTRIES); +#if defined(__i386__) + assert(slot < ARCH_VM_PT_ENTRIES); +#elif defined(__arm__) + assert(slot < ARCH_VM_PT_ENTRIES / pages_per_pagedir); +#endif - phys = pt->pt_dir_phys & I386_VM_ADDR_MASK; +#if defined(__i386__) + phys = pt->pt_dir_phys & ARCH_VM_ADDR_MASK; +#elif defined(__arm__) + phys = pt->pt_dir_phys & ARM_VM_PTE_MASK; +#endif assert(pt->pt_dir_phys == phys); +#if defined(__arm__) + assert(!(pt->pt_dir_phys % ARCH_PAGEDIR_SIZE)); +#endif /* Update "page directory pagetable." */ - page_directories[slot] = phys | I386_VM_PRESENT|I386_VM_WRITE; +#if defined(__i386__) + page_directories[slot] = phys | ARCH_VM_PDE_PRESENT|ARCH_VM_PTE_RW; +#elif defined(__arm__) + for (i = 0; i < pages_per_pagedir; i++) + page_directories[slot*pages_per_pagedir+i] = + (phys+i*VM_PAGE_SIZE) | + ARCH_VM_PTE_PRESENT | ARCH_VM_PTE_RW | + ARCH_VM_PTE_USER; +#endif /* This is where the PDE's will be visible to the kernel * in its address space. */ - pdes = (void *) (pagedir_pde*I386_BIG_PAGE_SIZE + - slot * I386_PAGE_SIZE); + pdes = (void *) (pagedir_pde*ARCH_BIG_PAGE_SIZE + +#if defined(__i386__) + slot * VM_PAGE_SIZE); +#elif defined(__arm__) + slot * ARCH_PAGEDIR_SIZE); +#endif #if 0 printf("VM: slot %d endpoint %d has pde val 0x%lx at kernel address 0x%lx\n", @@ -1079,7 +1476,7 @@ void pt_free(pt_t *pt) /* Free memory associated with this pagetable. */ int i; - for(i = 0; i < I386_VM_DIR_ENTRIES; i++) + for(i = 0; i < ARCH_VM_DIR_ENTRIES; i++) if(pt->pt_pt[i]) vm_freepages((vir_bytes) pt->pt_pt[i], 1); @@ -1095,7 +1492,11 @@ int pt_mapkernel(pt_t *pt) int kern_pde = kern_start_pde; phys_bytes addr, mapped = 0; +#if defined(__i386__) /* Any i386 page table needs to map in the kernel address space. */ +#elif defined(__arm__) + /* Any ARM page table needs to map in the kernel address space. */ +#endif assert(bigpage_ok); assert(pagedir_pde >= 0); assert(kern_pde >= 0); @@ -1105,11 +1506,18 @@ int pt_mapkernel(pt_t *pt) /* Actually mapping in kernel */ while(mapped < kern_size) { - pt->pt_dir[kern_pde] = addr | I386_VM_PRESENT | - I386_VM_BIGPAGE | I386_VM_WRITE | global_bit; +#if defined(__i386__) + pt->pt_dir[kern_pde] = addr | ARCH_VM_PDE_PRESENT | + ARCH_VM_BIGPAGE | ARCH_VM_PTE_RW | global_bit; +#elif defined(__arm__) + pt->pt_dir[kern_pde] = (addr & ARCH_VM_PDE_MASK) | + ARM_VM_SECTION | + ARM_VM_SECTION_DOMAIN | ARM_VM_SECTION_WB | + ARM_VM_SECTION_SHAREABLE | ARM_VM_SECTION_SUPER; +#endif kern_pde++; - mapped += I386_BIG_PAGE_SIZE; - addr += I386_BIG_PAGE_SIZE; + mapped += ARCH_BIG_PAGE_SIZE; + addr += ARCH_BIG_PAGE_SIZE; } /* Kernel also wants to know about all page directories. */ @@ -1137,6 +1545,9 @@ int pt_mapkernel(pt_t *pt) void pt_cycle(void) { vm_checkspares(); +#if defined(__arm__) + vm_checksparedirs(); +#endif } int get_vm_self_pages(void) { return vm_self_pages; } diff --git a/servers/vm/arch/i386/pagetable.h b/servers/vm/arch/i386/pagetable.h index acb12a02a..69bb1cd1d 100644 --- a/servers/vm/arch/i386/pagetable.h +++ b/servers/vm/arch/i386/pagetable.h @@ -7,23 +7,6 @@ #include "vm.h" -/* An i386 pagetable. */ -typedef struct { - /* Directory entries in VM addr space - root of page table. */ - u32_t *pt_dir; /* page aligned (I386_VM_DIR_ENTRIES) */ - u32_t pt_dir_phys; /* physical address of pt_dir */ - - /* Pointers to page tables in VM address space. */ - u32_t *pt_pt[I386_VM_DIR_ENTRIES]; - - /* When looking for a hole in virtual address space, start - * looking here. This is in linear addresses, i.e., - * not as the process sees it but the position in the page - * page table. This is just a hint. - */ - u32_t pt_virtop; -} pt_t; - /* Mapping flags. */ #define PTF_WRITE I386_VM_WRITE #define PTF_READ I386_VM_READ @@ -33,17 +16,29 @@ typedef struct { #define PTF_MAPALLOC I386_VM_PTAVAIL1 /* Page allocated by pt code. */ #define PTF_NOCACHE (I386_VM_PWT | I386_VM_PCD) +#define ARCH_VM_DIR_ENTRIES I386_VM_DIR_ENTRIES +#define ARCH_BIG_PAGE_SIZE I386_BIG_PAGE_SIZE +#define ARCH_VM_ADDR_MASK I386_VM_ADDR_MASK +#define ARCH_VM_PAGE_PRESENT I386_VM_PRESENT +#define ARCH_VM_PDE_MASK I386_VM_PDE_MASK +#define ARCH_VM_PDE_PRESENT I386_VM_PRESENT +#define ARCH_VM_PTE_PRESENT I386_VM_PRESENT +#define ARCH_VM_PTE_USER I386_VM_USER +#define ARCH_VM_PTE_RW I386_VM_WRITE +#define ARCH_PAGEDIR_SIZE I386_PAGEDIR_SIZE +#define ARCH_VM_BIGPAGE I386_VM_BIGPAGE +#define ARCH_VM_PT_ENTRIES I386_VM_PT_ENTRIES + /* For arch-specific PT routines to check if no bits outside * the regular flags are set. */ #define PTF_ALLFLAGS (PTF_READ|PTF_WRITE|PTF_PRESENT|PTF_USER|PTF_GLOBAL|PTF_NOCACHE) -#if SANITYCHECKS -#define PT_SANE(p) { pt_sanitycheck((p), __FILE__, __LINE__); } -#else -#define PT_SANE(p) -#endif - -#endif +#define PFERR_NOPAGE(e) (!((e) & I386_VM_PFE_P)) +#define PFERR_PROT(e) (((e) & I386_VM_PFE_P)) +#define PFERR_WRITE(e) ((e) & I386_VM_PFE_W) +#define PFERR_READ(e) (!((e) & I386_VM_PFE_W)) +#define VM_PAGE_SIZE I386_PAGE_SIZE +#endif diff --git a/servers/vm/arch/i386/util.S b/servers/vm/arch/i386/util.S deleted file mode 100644 index eb8c6a38d..000000000 --- a/servers/vm/arch/i386/util.S +++ /dev/null @@ -1,22 +0,0 @@ -#include - -/**===========================================================================* */ -/** i386_invlpg * */ -/**===========================================================================* */ -/* PUBLIC void i386_invlpg(u32_t addr) */ -/* Tell the processor to invalidate a tlb entry at virtual address addr. */ -ENTRY(i386_invlpg) - push %ebp - mov %esp, %ebp - push %eax - - mov 8(%ebp), %eax -#ifdef __ACK__ - invlpg %eax -#else - invlpg (%eax) -#endif - - pop %eax - pop %ebp - ret diff --git a/servers/vm/fork.c b/servers/vm/fork.c index 5a8c57e06..39dcd9d8b 100644 --- a/servers/vm/fork.c +++ b/servers/vm/fork.c @@ -27,7 +27,6 @@ #include "util.h" #include "sanitycheck.h" #include "region.h" -#include "memory.h" /*===========================================================================* * do_fork * diff --git a/servers/vm/main.c b/servers/vm/main.c index 10124586c..d40a0b621 100644 --- a/servers/vm/main.c +++ b/servers/vm/main.c @@ -28,8 +28,6 @@ #include #include -#include - #define _MAIN 1 #include "glo.h" #include "proto.h" diff --git a/servers/vm/mmap.c b/servers/vm/mmap.c index cc63523b1..8a9bf22e6 100644 --- a/servers/vm/mmap.c +++ b/servers/vm/mmap.c @@ -26,7 +26,6 @@ #include #include #include -#include #include "glo.h" #include "proto.h" diff --git a/servers/vm/pagefaults.c b/servers/vm/pagefaults.c index 04b3037af..97d9678da 100644 --- a/servers/vm/pagefaults.c +++ b/servers/vm/pagefaults.c @@ -24,11 +24,8 @@ #include #include -#include - #include "glo.h" #include "proto.h" -#include "memory.h" #include "util.h" #include "region.h" diff --git a/servers/vm/pb.c b/servers/vm/pb.c index 3cf06f176..736c7f986 100644 --- a/servers/vm/pb.c +++ b/servers/vm/pb.c @@ -19,7 +19,6 @@ #include #include #include -#include #include #include "vm.h" diff --git a/servers/vm/proto.h b/servers/vm/proto.h index 2f3ee76c6..d38f59022 100644 --- a/servers/vm/proto.h +++ b/servers/vm/proto.h @@ -12,8 +12,8 @@ struct phys_region; #include #include #include -#include +#include "pt.h" #include "vm.h" #include "yielded.h" diff --git a/servers/vm/pt.h b/servers/vm/pt.h new file mode 100644 index 000000000..6d43758a1 --- /dev/null +++ b/servers/vm/pt.h @@ -0,0 +1,29 @@ + +#ifndef _PT_H +#define _PT_H 1 + +#include + +#include "vm.h" +#include "pagetable.h" + +/* A pagetable. */ +typedef struct { + /* Directory entries in VM addr space - root of page table. */ + u32_t *pt_dir; /* page aligned (ARCH_VM_DIR_ENTRIES) */ + u32_t pt_dir_phys; /* physical address of pt_dir */ + + /* Pointers to page tables in VM address space. */ + u32_t *pt_pt[ARCH_VM_DIR_ENTRIES]; + + /* When looking for a hole in virtual address space, start + * looking here. This is in linear addresses, i.e., + * not as the process sees it but the position in the page + * page table. This is just a hint. + */ + u32_t pt_virtop; +} pt_t; + +#define CLICKSPERPAGE (VM_PAGE_SIZE/CLICK_SIZE) + +#endif diff --git a/servers/vm/region.c b/servers/vm/region.c index 373b96bbd..ee54cef69 100644 --- a/servers/vm/region.c +++ b/servers/vm/region.c @@ -17,7 +17,6 @@ #include #include #include -#include #include #include "vm.h" diff --git a/servers/vm/rs.c b/servers/vm/rs.c index 5fef8c447..e932f6b14 100644 --- a/servers/vm/rs.c +++ b/servers/vm/rs.c @@ -21,7 +21,6 @@ #include #include #include -#include #include "glo.h" #include "proto.h" diff --git a/servers/vm/sanitycheck.h b/servers/vm/sanitycheck.h index 78ddc8635..1528a3ec1 100644 --- a/servers/vm/sanitycheck.h +++ b/servers/vm/sanitycheck.h @@ -7,6 +7,8 @@ #if SANITYCHECKS +#define PT_SANE(p) { pt_sanitycheck((p), __FILE__, __LINE__); } + /* This macro is used in the sanity check functions, where file and * line are function arguments. */ @@ -48,6 +50,7 @@ #define SLABSANITYCHECK(l) #define SLABSANE(ptr) #define MYASSERT(c) +#define PT_SANE(p) #endif #if MEMPROTECT diff --git a/servers/vm/slaballoc.c b/servers/vm/slaballoc.c index e7f1d6586..b7dd8bc02 100644 --- a/servers/vm/slaballoc.c +++ b/servers/vm/slaballoc.c @@ -21,8 +21,6 @@ #include #include -#include - #include #include "glo.h" diff --git a/servers/vm/utility.c b/servers/vm/utility.c index d4178bb07..a23a1996c 100644 --- a/servers/vm/utility.c +++ b/servers/vm/utility.c @@ -22,7 +22,6 @@ #include #include #include -#include #include #include diff --git a/servers/vm/vm.h b/servers/vm/vm.h index bc40d565c..b6d91f6fa 100644 --- a/servers/vm/vm.h +++ b/servers/vm/vm.h @@ -13,7 +13,6 @@ #define JUNKFREE 0 /* Fill freed pages with junk */ #include -#include #include "sanitycheck.h" #include "region.h" @@ -61,5 +60,9 @@ #define MAP_NONE 0xFFFFFFFE #define NO_MEM ((phys_clicks) MAP_NONE) /* returned by alloc_mem() with mem is up */ +/* And what is the highest addressable piece of memory? */ +#define VM_DATATOP kernel_boot_info.user_end +#define VM_STACKTOP kernel_boot_info.user_sp + #endif diff --git a/servers/vm/vmproc.h b/servers/vm/vmproc.h index 8cb00e155..1c9c488bc 100644 --- a/servers/vm/vmproc.h +++ b/servers/vm/vmproc.h @@ -2,10 +2,10 @@ #ifndef _VMPROC_H #define _VMPROC_H 1 -#include #include #include +#include "pt.h" #include "vm.h" #include "physravl.h" #include "yieldedavl.h"