diff options
Diffstat (limited to 'src/sys/include/vm/mmu.h')
| -rw-r--r-- | src/sys/include/vm/mmu.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/sys/include/vm/mmu.h b/src/sys/include/vm/mmu.h index be0678e..54a694b 100644 --- a/src/sys/include/vm/mmu.h +++ b/src/sys/include/vm/mmu.h @@ -41,6 +41,17 @@ #include <machine/vas.h> /* standard */ #include <vm/vm.h> +/* Caching types */ +#define MMU_CACHE_UC BIT(0) /* Uncachable */ +#define MMU_CACHE_WT BIT(1) /* Write-through */ +#define MMU_CACHE_GL BIT(2) /* Global (if supported) */ + +/* + * Represents caching attributes that can be applied + * to the address space (see VM_CACHE_* above). + */ +typedef uint16_t cacheattr_t; + /* * Standard memory protection flags */ @@ -127,4 +138,16 @@ int mmu_write_vas(struct vm_vas *vas); */ int mmu_free_vas(struct vm_vas *vas); +/* + * Update page-level caching attributes + * + * @vas: Virtual address space to target + * @va: Virtual page base to update + * @attr: Attributes to set + * + * Returns zero on success, otherwise a less than + * zero value to indicate error. + */ +int pmap_set_cache(struct vm_vas *vas, vaddr_t va, cacheattr_t attr); + #endif /* !_MACHINE_MMU_H_ */ |