x86: zimage: Support booting Linux kernel from an EFI payload

[oweals/u-boot.git] / arch / x86 / cpu / efi / payload.c

diff --git a/arch/x86/cpu/efi/payload.c b/arch/x86/cpu/efi/payload.c
index 0e7c7c1ba49dc4389ac0e75f867130c25bfdbff5..c323c7b19a592d50e6c891f567cfd25d5f2e205f 100644 (file)
--- a/arch/x86/cpu/efi/payload.c
+++ b/arch/x86/cpu/efi/payload.c
@@ -8,6 +8,7 @@
 #include <efi.h>
 #include <errno.h>
 #include <usb.h>
+#include <asm/bootparam.h>
 #include <asm/e820.h>
 #include <asm/post.h>
 
@@ -250,3 +251,39 @@ unsigned int install_e820_map(unsigned int max_entries,
 
        return num_entries;
 }
+
+void setup_efi_info(struct efi_info *efi_info)
+{
+       struct efi_entry_systable *table;
+       struct efi_entry_memmap *map;
+       char *signature;
+       int size, ret;
+
+       memset(efi_info, 0, sizeof(struct efi_info));
+
+       ret = efi_info_get(EFIET_SYS_TABLE, (void **)&table, &size);
+       if (ret) {
+               printf("Cannot find EFI system table, ret=%d\n", ret);
+               return;
+       }
+       efi_info->efi_systab = (u32)(table->sys_table);
+
+       ret = efi_info_get(EFIET_MEMORY_MAP, (void **)&map, &size);
+       if (ret) {
+               printf("Cannot find EFI memory map tables, ret=%d\n", ret);
+               return;
+       }
+       efi_info->efi_memdesc_size = map->desc_size;
+       efi_info->efi_memdesc_version = map->version;
+       efi_info->efi_memmap = (u32)(map->desc);
+       efi_info->efi_memmap_size = size - sizeof(struct efi_entry_memmap);
+
+#ifdef CONFIG_EFI_STUB_64BIT
+       efi_info->efi_systab_hi = table->sys_table >> 32;
+       efi_info->efi_memmap_hi = (u64)(u32)(map->desc) >> 32;
+       signature = EFI64_LOADER_SIGNATURE;
+#else
+       signature = EFI32_LOADER_SIGNATURE;
+#endif
+       memcpy(&efi_info->efi_loader_signature, signature, 4);
+}