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Merge pci_BaS_gcc branch from trunk (new attempt)

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This commit is contained in:
David Gálvez
2014-07-10 15:36:48 +00:00
parent b9bf2e32ba
commit 2a9e4fc1a6
54 changed files with 3645 additions and 998 deletions
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61
pci_BaS_gcc/include/mmu.h
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@@ -26,8 +26,67 @@
#include "bas_types.h"
/*
* ACR register handling macros
*/
#define ACR_BA(x) ((x) & 0xffff0000)
#define ACR_ADMSK(x) (((x) & 0xffff) << 16)
#define ACR_E(x) (((x) & 1) << 15)
#define ACR_S(x) (((x) & 3) << 13)
#define ACR_S_USERMODE 0
#define ACR_S_SUPERVISOR_MODE 1
#define ACR_S_ALL 2
#define ACR_ADDRESS_MASK_MODE(x) (((x) & 1) << 10)
#define ACR_CACHE_MODE(x) (((x) & 3) << 5)
#define ACR_SUPERVISOR_PROTECT(x) (((x) & 1) << 3)
#define ACR_WRITE_PROTECT(x) (((x) & 1) << 2)
/*
* MMU register handling macros
*/
#define SCA_PAGE_ID 6 /* indicates video memory page */
/*
* 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
/*
* cache modes
*/
#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 page_id:8;
unsigned access:3;
unsigned unused:18;
};
/*
* global variables from linker script
*/
@@ -35,6 +94,6 @@ extern long video_tlb;
extern long video_sbt;
extern void mmu_init(void);
extern void mmutr_miss(uint32_t addresss);
extern void mmu_map_page(uint32_t virt, uint32_t phys, uint32_t map_size, struct map_flags flags);
#endif /* _MMU_H_ */