diff options
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv8/cache_v8.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c index 9b3c37dae82..672ec16d483 100644 --- a/arch/arm/cpu/armv8/cache_v8.c +++ b/arch/arm/cpu/armv8/cache_v8.c @@ -86,6 +86,32 @@ int mem_map_from_dram_banks(unsigned int index, unsigned int len, u64 attrs) return 0; } + +int mmu_unmap_reserved_mem(const char *name, bool check_nomap) +{ + void *fdt = (void *)gd->fdt_blob; + char node_path[128]; + fdt_addr_t addr; + fdt_size_t size; + int ret; + + snprintf(node_path, sizeof(node_path), "/reserved-memory/%s", name); + ret = fdt_path_offset(fdt, node_path); + if (ret < 0) + return ret; + + if (check_nomap && !fdtdec_get_bool(fdt, ret, "no-map")) + return -EINVAL; + + addr = fdtdec_get_addr_size(fdt, ret, "reg", &size); + if (addr == FDT_ADDR_T_NONE) + return -1; + + mmu_change_region_attr_nobreak(addr, size, PTE_TYPE_FAULT); + + return 0; +} + u64 get_tcr(u64 *pips, u64 *pva_bits) { int el = get_effective_el(); |