Firebee/BaS_gcc
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

removed inlining in wait.c, added (simple) map-based MMU handling

Browse Source
This commit is contained in:
Markus Fröschle
2014-01-18 14:03:25 +00:00
parent 386a921f84
commit 8544307830
6 changed files with 220 additions and 134 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
include/mmu.h
View File

@@ -41,13 +41,8 @@
#define ACR_AMM(x) (((x) & 1) << 10)
#define ACR_CM(x) (((x) & 3) << 5)
#define ACR_CM_CACHEABLE_WT 0x0
#define ACR_CM_CACHEABLE_CB 0x1
#define ACR_CM_CACHE_INH_PRECISE 0x2
#define ACR_CM_CACHE_INH_IMPRECISE 0x3
#define ACR_SP(x) (((x) & 1) << 3)
#define ACR_W(x) (((x) & 1) << 2)
#define ACR_SP(x) (((x) & 1) << 3)
#define ACR_W(x) (((x) & 1) << 2)
/*
@@ -65,12 +60,31 @@
#define MMU_PAGE_SIZE_1K 3
/*
* MMU cache modes
* cache modes
*/
#define MMU_CACHE_WRITETHROUGH 0
#define MMU_CACHE_COPYBACK 1
#define MMU_CACHE_NOCACHE_PRECISE 2
#define MMU_CACHE_NOCACHE_IMPRECISE 3
#define CACHE_WRITETHROUGH 0
#define CACHE_COPYBACK 1
#define CACHE_NOCACHE_PRECISE 2
#define CACHE_NOCACHE_IMPRECISE 3
/*
* page flags
*/
#define SV_PROTECT 1
#define SV_USER 0
#define ACCESS_READ (1 << 0)
#define ACCESS_WRITE (1 << 1)
#define ACCESS_EXECUTE (1 << 2)
struct map_flags
{
unsigned cache_mode:2;
unsigned protection:1;
unsigned access:3;
unsigned unused:26;
};
/*
* global variables from linker script
@@ -79,6 +93,6 @@ 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, uint32_t map_flags);
extern void mmu_map_page(uint32_t virt, uint32_t phys, uint32_t map_size, struct map_flags flags);
#endif /* _MMU_H_ */