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introduce SIZE_DEFAULT and MMU_PAGESIZE_DEFAULT to make experiments with

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smaller pagesize more versatile
This commit is contained in:
Markus Fröschle
2016-04-17 18:19:21 +00:00
parent bff912704e
commit a280a8f901
1 changed files with 17 additions and 7 deletions
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24
include/mmu.h
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@@ -64,13 +64,14 @@ enum mmu_page_size
MMU_PAGE_SIZE_1K = 3
};
#define MMU_PAGE_SIZE_DEFAULT MMU_PAGE_SIZE_1M /* note: if this changes, SIZE_DEFAULT below _must_ also change */
#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 */
#define SIZE_DEFAULT SIZE_1M
/*
* cache modes
*/
@@ -97,16 +98,25 @@ enum mmu_page_size
extern long video_tlb;
extern long video_sbt;
struct mmu_page_descriptor;
struct mmu_page_descriptor
{
uint8_t cache_mode : 2;
uint8_t supervisor_protect : 1;
uint8_t read : 1;
uint8_t write : 1;
uint8_t execute : 1;
uint8_t global : 1;
uint8_t locked : 1;
};
extern void mmu_init(void);
extern int mmu_map_page(int32_t virt, int32_t phys, enum mmu_page_size sz, uint8_t page_id, const struct mmu_page_descriptor *flags);
extern uint32_t mmu_map_page(uint32_t virt, uint32_t phys, enum mmu_page_size sz, uint8_t page_id, const struct mmu_page_descriptor *flags);
/*
* API functions for the BaS driver interface
*/
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);
extern uint32_t mmu_map_data_page_locked(uint32_t address, uint32_t length, int asid);
extern uint32_t mmu_unlock_data_page(uint32_t address, uint32_t length, int asid);
extern uint32_t mmu_report_locked_pages(uint32_t *num_itlb, uint32_t *num_dtlb);
extern uint32_t mmu_report_pagesize(void);
#endif /* _MMU_H_ */