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rewritten mmu_map_page() and put into production

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This commit is contained in:
Markus Fröschle
2014-09-07 19:01:19 +00:00
parent cd341c499a
commit 87bd9eb2c6
5 changed files with 132 additions and 186 deletions
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20
BaS_gcc/include/mmu.h
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@@ -24,6 +24,7 @@
#ifndef _MMU_H_
#define _MMU_H_
#include <stddef.h>
#include "bas_types.h"
/*
@@ -54,10 +55,14 @@
/*
* MMU page sizes
*/
#define MMU_PAGE_SIZE_1M 0
#define MMU_PAGE_SIZE_4K 1
#define MMU_PAGE_SIZE_8K 2
#define MMU_PAGE_SIZE_1K 3
enum mmu_page_size
{
MMU_PAGE_SIZE_1M = 0,
MMU_PAGE_SIZE_4K = 1,
MMU_PAGE_SIZE_8K = 2,
MMU_PAGE_SIZE_1K = 3
};
/*
* cache modes
@@ -78,13 +83,14 @@
#define ACCESS_WRITE (1 << 1)
#define ACCESS_EXECUTE (1 << 2)
struct map_flags
struct mmu_map_flags
{
unsigned cache_mode:2;
unsigned protection:1;
unsigned page_id:8;
unsigned access:3;
unsigned unused:18;
unsigned locked:1;
unsigned unused:17;
};
/*
@@ -94,6 +100,6 @@ extern long video_tlb;
extern long video_sbt;
extern void mmu_init(void);
extern void mmu_map_page(uint32_t virt, uint32_t phys, uint32_t map_size, struct map_flags flags);
extern int mmu_map_page(uint32_t virt, uint32_t phys, enum mmu_page_size sz, const struct mmu_map_flags *flags);
#endif /* _MMU_H_ */