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first (untested) version of the modified MMU handling and API

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This commit is contained in:
Markus Fröschle
2014-09-29 12:32:19 +00:00
parent 37dfe6b7c5
commit 8e2fe53fab
5 changed files with 507 additions and 314 deletions
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26
include/mmu.h
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@@ -64,6 +64,13 @@ enum mmu_page_size
MMU_PAGE_SIZE_1K = 3
};
#define SIZE_1M 0x100000 /* 1 Megabyte */
#define SIZE_4K 0x1000 /* 4 KB */
#define SIZE_8K 0x2000 /* 8 KB */
#define SIZE_1K 0x400 /* 1 KB */
#define DEFAULT_PAGE_SIZE 0x00100000 /* 1M pagesize */
/*
* cache modes
*/
@@ -83,15 +90,6 @@ enum mmu_page_size
#define ACCESS_WRITE (1 << 1)
#define ACCESS_EXECUTE (1 << 2)
struct mmu_map_flags
{
unsigned cache_mode:2;
unsigned protection:1;
unsigned page_id:8;
unsigned access:3;
unsigned locked:1;
unsigned unused:17;
};
/*
* global variables from linker script
@@ -99,14 +97,16 @@ struct mmu_map_flags
extern long video_tlb;
extern long video_sbt;
struct page_descriptor;
extern void mmu_init(void);
extern int mmu_map_page(uint32_t virt, uint32_t phys, enum mmu_page_size sz, const struct mmu_map_flags *flags);
extern int mmu_map_page(uint32_t virt, uint32_t phys, enum mmu_page_size sz, uint8_t page_id, const struct page_descriptor *flags);
/*
* API functions for the BaS driver interface
*/
extern int32_t mmu_map_page_locked(uint32_t address, uint32_t length);
extern int32_t mmu_unlock_page(uint32_t address, uint32_t length);
extern int32_t mmu_report_locked_pages(void);
extern int32_t mmu_map_data_page_locked(uint32_t address, uint32_t length, int asid);
extern int32_t mmu_unlock_data_page(uint32_t address, uint32_t length, int asid);
extern int32_t mmu_report_locked_pages(uint32_t *num_itlb, uint32_t *num_dtlb);
#endif /* _MMU_H_ */