From aac79251c7dfeb325f17dbded3076df278bfca89 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Thu, 23 Aug 2018 08:24:08 -0700 Subject: [PATCH] x86: efi: payload: Install E820 map from EFI memory map This implements payload-specific install_e820_map() to get E820 map from the EFI memory map descriptors. Signed-off-by: Bin Meng Reviewed-by: Simon Glass --- arch/x86/cpu/efi/payload.c | 82 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) diff --git a/arch/x86/cpu/efi/payload.c b/arch/x86/cpu/efi/payload.c index 4649bfe86e..0e7c7c1ba4 100644 --- a/arch/x86/cpu/efi/payload.c +++ b/arch/x86/cpu/efi/payload.c @@ -8,6 +8,7 @@ #include #include #include +#include #include DECLARE_GLOBAL_DATA_PTR; @@ -168,3 +169,84 @@ int last_stage_init(void) return 0; } + +unsigned int install_e820_map(unsigned int max_entries, + struct e820_entry *entries) +{ + struct efi_mem_desc *desc, *end; + struct efi_entry_memmap *map; + int size, ret; + efi_physical_addr_t last_end_addr = 0; + struct e820_entry *last_entry = NULL; + __u32 e820_type; + unsigned int num_entries = 0; + + ret = efi_info_get(EFIET_MEMORY_MAP, (void **)&map, &size); + if (ret) { + printf("Cannot find EFI memory map tables, ret=%d\n", ret); + + return -ENODEV; + } + + end = (struct efi_mem_desc *)((ulong)map + size); + for (desc = map->desc; desc < end; + desc = efi_get_next_mem_desc(map, desc)) { + if (desc->num_pages == 0) + continue; + + switch (desc->type) { + case EFI_LOADER_CODE: + case EFI_LOADER_DATA: + case EFI_BOOT_SERVICES_CODE: + case EFI_BOOT_SERVICES_DATA: + case EFI_CONVENTIONAL_MEMORY: + e820_type = E820_RAM; + break; + + case EFI_RESERVED_MEMORY_TYPE: + case EFI_RUNTIME_SERVICES_CODE: + case EFI_RUNTIME_SERVICES_DATA: + case EFI_MMAP_IO: + case EFI_MMAP_IO_PORT: + case EFI_PAL_CODE: + e820_type = E820_RESERVED; + break; + + case EFI_ACPI_RECLAIM_MEMORY: + e820_type = E820_ACPI; + break; + + case EFI_ACPI_MEMORY_NVS: + e820_type = E820_NVS; + break; + + case EFI_UNUSABLE_MEMORY: + e820_type = E820_UNUSABLE; + break; + + default: + printf("Invalid EFI memory descriptor type (0x%x)!\n", + desc->type); + continue; + } + + if (last_entry != NULL && last_entry->type == e820_type && + desc->physical_start == last_end_addr) { + last_entry->size += (desc->num_pages << EFI_PAGE_SHIFT); + last_end_addr += (desc->num_pages << EFI_PAGE_SHIFT); + } else { + if (num_entries >= E820MAX) + break; + + entries[num_entries].addr = desc->physical_start; + entries[num_entries].size = desc->num_pages; + entries[num_entries].size <<= EFI_PAGE_SHIFT; + entries[num_entries].type = e820_type; + last_entry = &entries[num_entries]; + last_end_addr = last_entry->addr + last_entry->size; + num_entries++; + } + } + + return num_entries; +} -- 2.25.1