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add the support of (explicit) write through caching

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This commit is contained in:
Stefan Lankes 2011-09-03 13:25:49 -07:00
parent 6b8d635c3b
commit 62070aa3a9
2 changed files with 4 additions and 1 deletions
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3
arch/x86/mm/page.c
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@ -367,6 +367,9 @@ size_t map_region(size_t viraddr, size_t phyaddr, uint32_t npages, uint32_t flag
if (flags & MAP_NO_ACCESS)
pgt->entries[index] &= ~PG_PRESENT;
if (flags & MAP_WT)
pgt->entries[index] |= PG_PWT;
if (flags & MAP_USER_SPACE)
atomic_int32_inc(&task->user_usage);

2
include/metalsvm/stdlib.h
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@ -41,7 +41,7 @@ extern "C" {
#define MAP_USER_SPACE (1 << 1)
#define MAP_PAGE_TABLE (1 << 2)
#define MAP_NO_CACHE (1 << 3)
//#define MAP_STACK (1 << 4)
#define MAP_WT (1 << 5)
//#define MAP_HEAP (1 << 5)
#define MAP_CODE (1 << 6)
#define MAP_READONLY (1 << 7)