diff options
Diffstat (limited to 'arch/arm/cpu/armv8/cache_v8.c')
| -rw-r--r-- | arch/arm/cpu/armv8/cache_v8.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c index c5ec529..c22f7b6 100644 --- a/arch/arm/cpu/armv8/cache_v8.c +++ b/arch/arm/cpu/armv8/cache_v8.c @@ -25,9 +25,9 @@ void set_pgtable_section(u64 *page_table, u64 index, u64 section, /* to activate the MMU we need to set up virtual memory */ static void mmu_setup(void) { - int i, j, el; bd_t *bd = gd->bd; - u64 *page_table = (u64 *)gd->arch.tlb_addr; + u64 *page_table = (u64 *)gd->arch.tlb_addr, i, j; + int el; /* Setup an identity-mapping for all spaces */ for (i = 0; i < (PGTABLE_SIZE >> 3); i++) { @@ -139,6 +139,37 @@ int dcache_status(void) return (get_sctlr() & CR_C) != 0; } +u64 *__weak arch_get_page_table(void) { + puts("No page table offset defined\n"); + + return NULL; +} + +void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size, + enum dcache_option option) +{ + u64 *page_table = arch_get_page_table(); + u64 upto, end; + + if (page_table == NULL) + return; + + end = ALIGN(start + size, (1 << MMU_SECTION_SHIFT)) >> + MMU_SECTION_SHIFT; + start = start >> MMU_SECTION_SHIFT; + for (upto = start; upto < end; upto++) { + page_table[upto] &= ~PMD_ATTRINDX_MASK; + page_table[upto] |= PMD_ATTRINDX(option); + } + asm volatile("dsb sy"); + __asm_invalidate_tlb_all(); + asm volatile("dsb sy"); + asm volatile("isb"); + start = start << MMU_SECTION_SHIFT; + end = end << MMU_SECTION_SHIFT; + flush_dcache_range(start, end); + asm volatile("dsb sy"); +} #else /* CONFIG_SYS_DCACHE_OFF */ void invalidate_dcache_all(void) @@ -170,6 +201,11 @@ int dcache_status(void) return 0; } +void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size, + enum dcache_option option) +{ +} + #endif /* CONFIG_SYS_DCACHE_OFF */ #ifndef CONFIG_SYS_ICACHE_OFF |