From: Arun Thomas <arun@minix3.org>
Date: Thu, 16 Aug 2012 21:33:27 +0000 (+0200)
Subject: VM: allow for 16KB chunk alignment
X-Git-Tag: v3.2.1~365
X-Git-Url: http://zhaoyanbai.com/repos/nsupdate.html?a=commitdiff_plain;h=fc9b3f9bdd34dbfc5c8153180cdac6c0200c9c2e;p=minix.git

VM: allow for 16KB chunk alignment
---

diff --git a/servers/vm/alloc.c b/servers/vm/alloc.c
index 8a7108308..391071693 100644
--- a/servers/vm/alloc.c
+++ b/servers/vm/alloc.c
@@ -171,6 +171,9 @@ phys_clicks alloc_mem(phys_clicks clicks, u32_t memflags)
   if(memflags & PAF_ALIGN64K) {
   	align_clicks = (64 * 1024) / CLICK_SIZE;
 	clicks += align_clicks;
+  } else if(memflags & PAF_ALIGN16K) {
+	align_clicks = (16 * 1024) / CLICK_SIZE;
+	clicks += align_clicks;
   }
 
   mem = alloc_pages(clicks, memflags, NULL);
diff --git a/servers/vm/vm.h b/servers/vm/vm.h
index 85d218142..0e95b6ed7 100644
--- a/servers/vm/vm.h
+++ b/servers/vm/vm.h
@@ -8,6 +8,7 @@
 #define PAF_LOWER16MB	0x08
 #define PAF_LOWER1MB	0x10
 #define PAF_FIRSTBLOCK	0x20	/* alloc_mem: return first block */
+#define PAF_ALIGN16K	0x40	/* Aligned to 16k boundary. */
 
 #define MARK do { if(mark) { printf("%d\n", __LINE__); } } while(0)