mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-28 23:50:26 +09:00
d024236e5a
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
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* Copyright (c) 2015 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* EFI information obtained here:
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* http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES
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*
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* Common EFI functions
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*/
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#include <common.h>
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#include <debug_uart.h>
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#include <errno.h>
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#include <linux/err.h>
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#include <linux/types.h>
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#include <efi.h>
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#include <efi_api.h>
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/*
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* Unfortunately we cannot access any code outside what is built especially
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* for the stub. lib/string.c is already being built for the U-Boot payload
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* so it uses the wrong compiler flags. Add our own memset() here.
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*/
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static void efi_memset(void *ptr, int ch, int size)
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{
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char *dest = ptr;
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while (size-- > 0)
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*dest++ = ch;
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}
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/*
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* Since the EFI stub cannot access most of the U-Boot code, add our own
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* simple console output functions here. The EFI app will not use these since
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* it can use the normal console.
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*/
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void efi_putc(struct efi_priv *priv, const char ch)
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{
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struct efi_simple_text_output_protocol *con = priv->sys_table->con_out;
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uint16_t ucode[2];
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ucode[0] = ch;
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ucode[1] = '\0';
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con->output_string(con, ucode);
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}
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void efi_puts(struct efi_priv *priv, const char *str)
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{
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while (*str)
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efi_putc(priv, *str++);
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}
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int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
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struct efi_system_table *sys_table)
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{
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efi_guid_t loaded_image_guid = LOADED_IMAGE_PROTOCOL_GUID;
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struct efi_boot_services *boot = sys_table->boottime;
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struct efi_loaded_image *loaded_image;
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int ret;
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efi_memset(priv, '\0', sizeof(*priv));
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priv->sys_table = sys_table;
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priv->boot = sys_table->boottime;
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priv->parent_image = image;
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priv->run = sys_table->runtime;
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efi_puts(priv, "U-Boot EFI ");
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efi_puts(priv, banner);
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efi_putc(priv, ' ');
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ret = boot->open_protocol(priv->parent_image, &loaded_image_guid,
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(void **)&loaded_image, &priv->parent_image,
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NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
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if (ret) {
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efi_puts(priv, "Failed to get loaded image protocol\n");
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return ret;
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}
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priv->image_data_type = loaded_image->image_data_type;
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return 0;
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}
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void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp)
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{
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struct efi_boot_services *boot = priv->boot;
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void *buf = NULL;
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*retp = boot->allocate_pool(priv->image_data_type, size, &buf);
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return buf;
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}
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void efi_free(struct efi_priv *priv, void *ptr)
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{
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struct efi_boot_services *boot = priv->boot;
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boot->free_pool(ptr);
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}
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