From: acevest <zhaoyanbai@126.com>
Date: Sat, 14 Oct 2023 12:03:57 +0000 (+0800)
Subject: 硬盘的设备号从驱动器细化到分区
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=fad6a4867b51e40c1cec511926f4c3fc70ac31fc;p=kernel.git

硬盘的设备号从驱动器细化到分区
---

diff --git a/boot/cmdline.c b/boot/cmdline.c
index 4b6fd28..534191d 100644
--- a/boot/cmdline.c
+++ b/boot/cmdline.c
@@ -10,6 +10,7 @@
  *--------------------------------------------------------------------------
  */
 #include <fs.h>
+#include <ide.h>
 #include <printk.h>
 #include <stdlib.h>
 #include <string.h>
@@ -33,8 +34,18 @@ void parse_cmdline(const char *cmdline) {
     printk("cmdline: %s\n", system.cmdline);
 
     get_value("root", value);
-    assert(value[0] == 'h' && value[1] == 'd' && value[2] == 'a');
-    system.root_dev = MAKE_DEV(DEV_MAJOR_HDA, atoi(value + 3));
+
+    assert(strlen(value) >= 4);
+
+    assert(value[0] == 'h' && value[1] == 'd');
+    assert(value[2] >= 'a' && value[2] <= 'd');
+
+    int disk_drv_no = value[2] - 'a';
+
+    uint32_t part_no = atoi(value + 3);
+    assert(part_no >= 1);
+
+    system.root_dev = MAKE_DISK_DEV(disk_drv_no, part_no);
     printk("root device %s [0x%08x]\n", value, system.root_dev);
 
     get_value("delay", value);
diff --git a/drivers/ata.c b/drivers/ata.c
index 4a522fe..b6baa08 100644
--- a/drivers/ata.c
+++ b/drivers/ata.c
@@ -69,28 +69,6 @@ void ata_read_identity_string(const uint16_t *identify, int bgn, int end, char *
     buf[i] = 0;
 }
 
-void ata_read_partions(ide_part_t *part, const char *buf) {
-    int offset = PARTITION_TABLE_OFFSET;
-    const char *p = buf + offset;
-
-    for (int i = 0; i < 4; i++) {
-        part->flags = (uint8_t)p[0];
-        part->type = (uint8_t)p[4];
-        part->lba_start = *((uint32_t *)(p + 8));
-        uint32_t size = *((uint32_t *)(p + 12));
-        part->lba_end = part->lba_start + size;
-
-        printk("part[%d] %02X %02X %u %u\n", i, part->flags, part->type, part->lba_start,
-               part->lba_end == 0 ? 0 : part->lba_end - 1);
-
-        // 这里应该再判断一下part->flags，如果是扩展分区还需要再读取
-        // 先这样实现
-
-        p += 16;  // 每个分区16个字节
-        part++;
-    }
-}
-
 // 《AT Attachment 8 - ATA/ATAPI Command Set》
 void ide_ata_init() {
     for (int i = 0; i < MAX_IDE_DRIVE_CNT; i++) {
@@ -215,6 +193,7 @@ void ide_ata_init() {
         // 1~4代表各个主分区
         // 5~15 代表各个逻辑分区
         drv->partions[0].flags = 0x00;
+        drv->partions[0].type = 0x00;
         drv->partions[0].lba_start = 0;
         drv->partions[0].lba_end = drv->max_lba;
     }
@@ -227,7 +206,9 @@ void read_partition_table(ide_drive_t *drv, uint32_t ext_lba, uint32_t offset_lb
 
     disk_request_t r;
     char *sect = kmalloc(SECT_SIZE, 0);
-    r.dev = MAKE_DEV(DEV_MAJOR_IDE0 + (drv->drv_no >> 1), drv->drv_no % 2);
+
+    // part_no == 0 代表整场硬盘
+    r.dev = MAKE_DISK_DEV(drv->drv_no, 0);
     r.command = DISK_REQ_READ;
     r.pos = base + offset_lba;
     r.count = 1;
@@ -240,13 +221,13 @@ void read_partition_table(ide_drive_t *drv, uint32_t ext_lba, uint32_t offset_lb
         // MBR里的分区占据 [1,4]
         part_id = 1;
     } else {
-        // 扩展分区里的逻辑分区占据 [5,MAX_IDE_PARTIONS)
+        // 扩展分区里的逻辑分区占据 [5,MAX_DISK_PARTIONS)
         part_id = 5 + depth - 1;
     }
 
     const char *p = sect + PARTITION_TABLE_OFFSET;
     for (int i = 0; i < 4; i++) {
-        if (part_id >= MAX_IDE_PARTIONS) {
+        if (part_id >= MAX_DISK_PARTIONS) {
             break;
         }
         part = drv->partions + part_id;
@@ -265,7 +246,7 @@ void read_partition_table(ide_drive_t *drv, uint32_t ext_lba, uint32_t offset_lb
             ext_lba = ext_lba != 0 ? ext_lba : part->lba_start;
             read_partition_table(drv, ext_lba, part->lba_start, depth + 1);
         } else {
-            printk("part[%d] %02X %u %u\n", part_id + drv->drv_no * MAX_IDE_PARTIONS, part->type, part->lba_start,
+            printk("part[%d] %02X %u %u\n", part_id + drv->drv_no * MAX_DISK_PARTIONS, part->type, part->lba_start,
                    size);
         }
 
@@ -486,3 +467,25 @@ int ata_pio_read_ext(int drv, uint64_t pos, uint16_t count, int timeout, void *d
 
 //     return st;
 // }
+
+// void ata_read_partions(ide_part_t *part, const char *buf) {
+//     int offset = PARTITION_TABLE_OFFSET;
+//     const char *p = buf + offset;
+
+//     for (int i = 0; i < 4; i++) {
+//         part->flags = (uint8_t)p[0];
+//         part->type = (uint8_t)p[4];
+//         part->lba_start = *((uint32_t *)(p + 8));
+//         uint32_t size = *((uint32_t *)(p + 12));
+//         part->lba_end = part->lba_start + size;
+
+//         printk("part[%d] %02X %02X %u %u\n", i, part->flags, part->type, part->lba_start,
+//                part->lba_end == 0 ? 0 : part->lba_end - 1);
+
+//         // 这里应该再判断一下part->flags，如果是扩展分区还需要再读取
+//         // 先这样实现
+
+//         p += 16;  // 每个分区16个字节
+//         part++;
+//     }
+// }
diff --git a/drivers/block.c b/drivers/block.c
index 2fa1450..cb03173 100644
--- a/drivers/block.c
+++ b/drivers/block.c
@@ -24,7 +24,7 @@ blk_buffer_t *get_hash_block_buffer(dev_t dev, uint32_t block, uint16_t size) {}
 blk_buffer_t *block_read(dev_t dev, uint32_t block) {
     blk_buffer_t *bb = 0;
 
-    assert(DEV_MAJOR(dev) == DEV_MAJOR_IDE0);
+    assert(DEV_MAJOR(dev) == DEV_MAJOR_DISK);
     assert(DEV_MINOR(dev) == 1);
 
     // 目前不提供hash表组强起来的缓冲功能
@@ -51,7 +51,7 @@ void ata_read_ext2_sb() {
     const int size = offset + 1024;
     const int block = 1;
 
-    blk_buffer_t *bb = block_read(MAKE_DEV(DEV_MAJOR_IDE0, 1), block);
+    blk_buffer_t *bb = block_read(system.root_dev, block);
 
     ext2_sb_t *p = (ext2_sb_t *)(bb->data + offset);
     printk("inodes count %u inodes per group %u free %u\n", p->s_inodes_count, p->s_inodes_per_group,
diff --git a/drivers/ide.c b/drivers/ide.c
index 85284ef..4a9e332 100644
--- a/drivers/ide.c
+++ b/drivers/ide.c
@@ -177,13 +177,12 @@ void ide_init() {
 ide_drive_t *ide_get_drive(dev_t dev) {
     int major = DEV_MAJOR(dev);
     int minor = DEV_MINOR(dev);
-    assert(major == DEV_MAJOR_IDE0 || major == DEV_MAJOR_IDE1);
-    assert(minor < MAX_IDE_PARTIONS * 2);  // 因为一个通道有两个硬盘，每个硬盘最大MAX_IDE_PARTIONS分区
 
-    int channel = major == DEV_MAJOR_IDE0 ? 0 : 1;
-    int index = minor / MAX_IDE_PARTIONS;
+    int drv_no = minor / MAX_DISK_PARTIONS;
 
-    int drv_no = channel * 2 + index;
+    assert(major == DEV_MAJOR_DISK);
+    assert(minor >= 0);
+    assert(drv_no < MAX_IDE_DRIVE_CNT);
 
     ide_drive_t *drv = ide_drives + drv_no;
 
diff --git a/drivers/ide.h b/drivers/ide.h
index f738519..743bb0b 100644
--- a/drivers/ide.h
+++ b/drivers/ide.h
@@ -151,7 +151,9 @@
 
 // #define PARTITION_CNT 4
 #define PARTITION_TABLE_OFFSET 0x1BE
-#define MAX_IDE_PARTIONS 16
+#define MAX_DISK_PARTIONS 16
+
+#define MAKE_DISK_DEV(drv_no, part_no) MAKE_DEV(DEV_MAJOR_DISK, (drv_no)*MAX_DISK_PARTIONS + (part_no))
 
 // 分区定义
 typedef struct ide_part_ {
@@ -205,7 +207,7 @@ typedef struct _ide_drive {
 
     ide_pci_controller_t *ide_pci_controller;
 
-    ide_part_t partions[MAX_IDE_PARTIONS];
+    ide_part_t partions[MAX_DISK_PARTIONS];
 } ide_drive_t;
 
 #define MAX_IDE_DRIVE_CNT 4
diff --git a/gdbscript b/gdbscript
index 2304377..7e970f0 100644
--- a/gdbscript
+++ b/gdbscript
@@ -1,7 +1,5 @@
-# kill qemu on gdb exit
-#define hook-quit
-#    kill
-#end
+# 避免退出gdb时二次确认
+set confirm off
 
 #b *0x7c00
 
diff --git a/include/fs.h b/include/fs.h
index 6cfc181..77bb046 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -23,8 +23,9 @@
 #define DEV_MAJOR_UNUSED 0x0000
 #define DEV_MAJOR_MEM 0x0001
 #define DEV_MAJOR_TTY 0x0002
-#define DEV_MAJOR_IDE0 0x0003
-#define DEV_MAJOR_HDA DEV_MAJOR_IDE0
+#define DEV_MAJOR_DISK 0x0003
+// #define DEV_MAJOR_IDE0 0x0003
+// #define DEV_MAJOR_HDA DEV_MAJOR_IDE0
 #define DEV_MAJOR_IDE1 0x0004
 #define DEV_MAJOR_SCSI0 0x0005
 #define DEV_MAJOR_SCSI2 0x0006
diff --git a/kernel/sched.c b/kernel/sched.c
index 50bdb3d..2f832ab 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -234,6 +234,7 @@ void schedule() {
     task_union *next = sel != 0 ? sel : root;
 
     next->state = TASK_RUNNING;
+    next->reason = "";
 
     if (prev != next) {
         next->sched_cnt++;
diff --git a/kernel/setup.c b/kernel/setup.c
index cfda533..d947589 100644
--- a/kernel/setup.c
+++ b/kernel/setup.c
@@ -80,7 +80,7 @@ void setup_kernel() {
     boot_delay(DEFAULT_BOOT_DELAY_TICKS);
 
     extern tty_t *const monitor_tty;
-    // tty_switch(monitor_tty);
+    tty_switch(monitor_tty);
 
     boot_delay(DEFAULT_BOOT_DELAY_TICKS);
 
diff --git a/kernel/task_disk.c b/kernel/task_disk.c
index b26ac64..6706b85 100644
--- a/kernel/task_disk.c
+++ b/kernel/task_disk.c
@@ -61,9 +61,9 @@ void disk_task_entry(void *arg) {
             asm("hlt;");
         }
 
-        // printk("wait request for hard disk %d\n", drv_no);
+        // printk("wait request for hard disk channel %d\n", channel);
         down(&ide_ctrl->request_queue.sem);
-        // printk("hard disk %d\n", drv_no);
+        // printk("hard disk channel %d\n", channel);
 
         mutex_lock(&ide_ctrl->request_mutex);
         disk_request_t *r;
@@ -76,7 +76,6 @@ void disk_task_entry(void *arg) {
         atomic_inc(&ide_ctrl->consumed_cnt);
         mutex_unlock(&ide_ctrl->request_mutex);
 
-        // TODO dev -> drv
         ide_drive_t *drv = ide_get_drive(r->dev);
         int drv_no = drv->drv_no;
         if (drv->present == 0) {
@@ -96,11 +95,12 @@ void disk_task_entry(void *arg) {
             ata_dma_read_ext(drv_no, r->pos, r->count, r->buf);
             break;
         default:
+            panic("invalid disk request command");
             break;
         }
 
         // 等待硬盘中断
-        printk("down ide req\n");
+        // printk("down ide req\n");
         down(&ide_ctrl->disk_intr_sem);
 
         // 读数据
diff --git a/kernel/task_root.c b/kernel/task_root.c
index b959074..9ea4224 100644
--- a/kernel/task_root.c
+++ b/kernel/task_root.c
@@ -9,6 +9,7 @@
 
 #include <disk.h>
 #include <fcntl.h>
+#include <ide.h>
 #include <io.h>
 #include <irq.h>
 #include <page.h>
@@ -106,14 +107,14 @@ void taskA_entry() {
         memset(disk_buf1, 0, 512);
 
         disk_request_t r;
-        r.dev = 0;
+        r.dev = MAKE_DISK_DEV(0, 0);
         r.command = DISK_REQ_READ;
         r.pos = sect_nr;
         r.count = 1;
         r.buf = disk_buf1;
         send_disk_request(&r);
 
-        verify_hd_data(sect_nr, disk_buf1, current->name);
+        // verify_hd_data(sect_nr, disk_buf1, current->name);
 
         for (int i = 0; i < 2; i++) {
             asm("hlt;");
@@ -129,13 +130,13 @@ void taskB_entry() {
         uint64_t sect_nr = get_next_deubug_sect_nr();
         memset(disk_buf2, 0, 512);
         disk_request_t r;
-        r.dev = 2;
+        r.dev = MAKE_DISK_DEV(2, 0);
         r.command = DISK_REQ_READ;
         r.pos = sect_nr;
         r.count = 1;
         r.buf = disk_buf2;
         send_disk_request(&r);
-        verify_hd_data(sect_nr, disk_buf2, current->name);
+        // verify_hd_data(sect_nr, disk_buf2, current->name);
 
         for (int i = 0; i < 1; i++) {
             asm("hlt;");
@@ -178,9 +179,11 @@ void root_task_entry() {
     //     asm("hlt;");
     // }
 
-    // kernel_task("tskA", taskA_entry, NULL);
-    // kernel_task("tskB", taskB_entry, NULL);
-    // kernel_task("tskC", taskC_entry, NULL);
+#if 1
+    kernel_task("tskA", taskA_entry, NULL);
+    kernel_task("tskB", taskB_entry, NULL);
+    kernel_task("tskC", taskC_entry, NULL);
+#endif
 
     current->priority = 1;
     while (1) {
diff --git a/kernel/task_user.c b/kernel/task_user.c
index 03d381e..cb8b880 100644
--- a/kernel/task_user.c
+++ b/kernel/task_user.c
@@ -43,7 +43,7 @@ void __ring3text__ __attribute__((__aligned__(PAGE_SIZE))) ring3_entry() {
                             // 共享代码会利用保存在栈上的地址返回到sysexit_return_address处
             "pushl $0;"
             "pushl $0;"
-            "movl $2, %%ebx;"
+            "movl $200, %%ebx;"
             "pushl %%ebp;"
             "movl  %%esp, %%ebp;"
             "sysenter;"
diff --git a/scripts/iso.grub.cfg b/scripts/iso.grub.cfg
index 1950e45..00c0acc 100644
--- a/scripts/iso.grub.cfg
+++ b/scripts/iso.grub.cfg
@@ -10,6 +10,6 @@ menuentry 'Kernel' --class os {
     #insmod ext2
     #set gfxpayload=1024x768x32
     #insmod all_video
-    multiboot2 /boot/Kernel root=hda0 delay=2
+    multiboot2 /boot/Kernel root=hda1 delay=2
     boot
 }