diff options
Diffstat (limited to 'lib/efi/efi.c')
-rw-r--r-- | lib/efi/efi.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/lib/efi/efi.c b/lib/efi/efi.c deleted file mode 100644 index bcb34d67465..00000000000 --- a/lib/efi/efi.c +++ /dev/null @@ -1,208 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Functions shared by the app and stub - * - * Copyright (c) 2015 Google, Inc - * - * EFI information obtained here: - * http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES - * - * Common EFI functions - */ - -#include <debug_uart.h> -#include <errno.h> -#include <malloc.h> -#include <linux/err.h> -#include <linux/types.h> -#include <efi.h> -#include <efi_api.h> - -static struct efi_priv *global_priv; - -struct efi_priv *efi_get_priv(void) -{ - return global_priv; -} - -void efi_set_priv(struct efi_priv *priv) -{ - global_priv = priv; -} - -struct efi_system_table *efi_get_sys_table(void) -{ - return global_priv->sys_table; -} - -struct efi_boot_services *efi_get_boot(void) -{ - return global_priv->boot; -} - -unsigned long efi_get_ram_base(void) -{ - return global_priv->ram_base; -} - -/* - * Global declaration of gd. - * - * As we write to it before relocation we have to make sure it is not put into - * a .bss section which may overlap a .rela section. Initialization forces it - * into a .data section which cannot overlap any .rela section. - */ -struct global_data *global_data_ptr = (struct global_data *)~0; - -/* - * Unfortunately we cannot access any code outside what is built especially - * for the stub. lib/string.c is already being built for the U-Boot payload - * so it uses the wrong compiler flags. Add our own memset() here. - */ -static void efi_memset(void *ptr, int ch, int size) -{ - char *dest = ptr; - - while (size-- > 0) - *dest++ = ch; -} - -/* - * Since the EFI stub cannot access most of the U-Boot code, add our own - * simple console output functions here. The EFI app will not use these since - * it can use the normal console. - */ -void efi_putc(struct efi_priv *priv, const char ch) -{ - struct efi_simple_text_output_protocol *con = priv->sys_table->con_out; - uint16_t ucode[2]; - - ucode[0] = ch; - ucode[1] = '\0'; - con->output_string(con, ucode); -} - -void efi_puts(struct efi_priv *priv, const char *str) -{ - while (*str) - efi_putc(priv, *str++); -} - -int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image, - struct efi_system_table *sys_table) -{ - efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID; - struct efi_boot_services *boot = sys_table->boottime; - struct efi_loaded_image *loaded_image; - int ret; - - efi_memset(priv, '\0', sizeof(*priv)); - priv->sys_table = sys_table; - priv->boot = sys_table->boottime; - priv->parent_image = image; - priv->run = sys_table->runtime; - - efi_puts(priv, "U-Boot EFI "); - efi_puts(priv, banner); - efi_putc(priv, ' '); - - ret = boot->open_protocol(priv->parent_image, &loaded_image_guid, - (void **)&loaded_image, priv->parent_image, - NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL); - if (ret) { - efi_puts(priv, "Failed to get loaded image protocol\n"); - return ret; - } - priv->image_data_type = loaded_image->image_data_type; - - return 0; -} - -void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp) -{ - struct efi_boot_services *boot = priv->boot; - void *buf = NULL; - - *retp = boot->allocate_pool(priv->image_data_type, size, &buf); - - return buf; -} - -void efi_free(struct efi_priv *priv, void *ptr) -{ - struct efi_boot_services *boot = priv->boot; - - boot->free_pool(ptr); -} - -int efi_store_memory_map(struct efi_priv *priv) -{ - struct efi_boot_services *boot = priv->sys_table->boottime; - efi_uintn_t size, desc_size; - efi_status_t ret; - - /* Get the memory map so we can switch off EFI */ - size = 0; - ret = boot->get_memory_map(&size, NULL, &priv->memmap_key, - &priv->memmap_desc_size, - &priv->memmap_version); - if (ret != EFI_BUFFER_TOO_SMALL) { - /* - * Note this function avoids using printf() since it is not - * available in the stub - */ - printhex2(EFI_BITS_PER_LONG); - putc(' '); - printhex2(ret); - puts(" No memory map\n"); - return ret; - } - /* - * Since doing a malloc() may change the memory map and also we want to - * be able to read the memory map in efi_call_exit_boot_services() - * below, after more changes have happened - */ - priv->memmap_alloc = size + 1024; - priv->memmap_size = priv->memmap_alloc; - priv->memmap_desc = efi_malloc(priv, size, &ret); - if (!priv->memmap_desc) { - printhex2(ret); - puts(" No memory for memory descriptor\n"); - return ret; - } - - ret = boot->get_memory_map(&priv->memmap_size, priv->memmap_desc, - &priv->memmap_key, &desc_size, - &priv->memmap_version); - if (ret) { - printhex2(ret); - puts(" Can't get memory map\n"); - return ret; - } - - return 0; -} - -int efi_call_exit_boot_services(void) -{ - struct efi_priv *priv = efi_get_priv(); - const struct efi_boot_services *boot = priv->boot; - efi_uintn_t size; - u32 version; - efi_status_t ret; - - size = priv->memmap_alloc; - ret = boot->get_memory_map(&size, priv->memmap_desc, - &priv->memmap_key, - &priv->memmap_desc_size, &version); - if (ret) { - printhex2(ret); - puts(" Can't get memory map\n"); - return ret; - } - ret = boot->exit_boot_services(priv->parent_image, priv->memmap_key); - if (ret) - return ret; - - return 0; -} |