static void __init request_standard_resources(void) { struct memblock_region *region; struct resource *res; kernel_code.start = virt_to_phys(_text); kernel_code.end = virt_to_phys(__init_begin - 1); kernel_data.start = virt_to_phys(_sdata); kernel_data.end = virt_to_phys(_end - 1); for_each_memblock(memory, region) { res = alloc_bootmem_low(sizeof(*res)); if (memblock_is_nomap(region)) { res->name = "reserved"; res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; } else { res->name = "System RAM"; res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; } res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; request_resource(&iomem_resource, res); if (kernel_code.start >= res->start && kernel_code.end <= res->end) request_resource(res, &kernel_code); if (kernel_data.start >= res->start && kernel_data.end <= res->end) request_resource(res, &kernel_data); }
static void __init map_mem(pgd_t *pgd) { struct memblock_region *reg; /* map all the memory banks */ for_each_memblock(memory, reg) { phys_addr_t start = reg->base; phys_addr_t end = start + reg->size; if (start >= end) break; if (memblock_is_nomap(reg)) continue; __map_memblock(pgd, start, end); }
static void __init request_standard_resources(void) { struct memblock_region *region; struct resource *res; unsigned long i = 0; size_t res_size; kernel_code.start = __pa_symbol(_text); kernel_code.end = __pa_symbol(__init_begin - 1); kernel_data.start = __pa_symbol(_sdata); kernel_data.end = __pa_symbol(_end - 1); num_standard_resources = memblock.memory.cnt; res_size = num_standard_resources * sizeof(*standard_resources); standard_resources = memblock_alloc_low(res_size, SMP_CACHE_BYTES); if (!standard_resources) panic("%s: Failed to allocate %zu bytes\n", __func__, res_size); for_each_memblock(memory, region) { res = &standard_resources[i++]; if (memblock_is_nomap(region)) { res->name = "reserved"; res->flags = IORESOURCE_MEM; } else { res->name = "System RAM"; res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; } res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; request_resource(&iomem_resource, res); if (kernel_code.start >= res->start && kernel_code.end <= res->end) request_resource(res, &kernel_code); if (kernel_data.start >= res->start && kernel_data.end <= res->end) request_resource(res, &kernel_data); #ifdef CONFIG_KEXEC_CORE /* Userspace will find "Crash kernel" region in /proc/iomem. */ if (crashk_res.end && crashk_res.start >= res->start && crashk_res.end <= res->end) request_resource(res, &crashk_res); #endif }
static void __init free_highpages(void) { unsigned long max_low = max_low_pfn; struct memblock_region *mem, *res; reset_all_zones_managed_pages(); /* set highmem page free */ for_each_memblock(memory, mem) { unsigned long start = memblock_region_memory_base_pfn(mem); unsigned long end = memblock_region_memory_end_pfn(mem); /* Ignore complete lowmem entries */ if (end <= max_low) continue; if (memblock_is_nomap(mem)) continue; /* Truncate partial highmem entries */ if (start < max_low) start = max_low; /* Find and exclude any reserved regions */ for_each_memblock(reserved, res) { unsigned long res_start, res_end; res_start = memblock_region_reserved_base_pfn(res); res_end = memblock_region_reserved_end_pfn(res); if (res_end < start) continue; if (res_start < start) res_start = start; if (res_start > end) res_start = end; if (res_end > end) res_end = end; if (res_start != start) free_area_high(start, res_start); start = res_end; if (start == end) break; }