mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-09-28 02:12:07 +00:00
156ccbc3c4
At present we use wide characters for unicode but this is not necessary. Change the code to use the 'u' literal instead. This helps to fix build warnings for sandbox on rpi. Signed-off-by: Simon Glass <sjg@chromium.org> Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2020, Linaro Limited
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*/
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#define LOG_CATEGORY LOGC_EFI
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#include <common.h>
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#include <env.h>
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#include <malloc.h>
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#include <dm.h>
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#include <fs.h>
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#include <efi_load_initrd.h>
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#include <efi_loader.h>
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#include <efi_variable.h>
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#if defined(CONFIG_CMD_EFIDEBUG) || defined(CONFIG_EFI_LOAD_FILE2_INITRD)
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/* GUID used by Linux to identify the LoadFile2 protocol with the initrd */
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const efi_guid_t efi_lf2_initrd_guid = EFI_INITRD_MEDIA_GUID;
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#endif
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/**
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* efi_create_current_boot_var() - Return Boot#### name were #### is replaced by
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* the value of BootCurrent
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*
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* @var_name: variable name
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* @var_name_size: size of var_name
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*
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* Return: Status code
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*/
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static efi_status_t efi_create_current_boot_var(u16 var_name[],
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size_t var_name_size)
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{
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efi_uintn_t boot_current_size;
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efi_status_t ret;
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u16 boot_current;
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u16 *pos;
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boot_current_size = sizeof(boot_current);
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ret = efi_get_variable_int(u"BootCurrent",
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&efi_global_variable_guid, NULL,
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&boot_current_size, &boot_current, NULL);
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if (ret != EFI_SUCCESS)
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goto out;
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pos = efi_create_indexed_name(var_name, var_name_size, "Boot",
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boot_current);
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if (!pos) {
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ret = EFI_OUT_OF_RESOURCES;
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goto out;
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}
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out:
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return ret;
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}
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/**
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* efi_get_dp_from_boot() - Retrieve and return a device path from an EFI
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* Boot### variable.
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* A boot option may contain an array of device paths.
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* We use a VenMedia() with a specific GUID to identify
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* the usage of the array members. This function is
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* used to extract a specific device path
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*
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* @guid: vendor GUID of the VenMedia() device path node identifying the
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* device path
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*
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* Return: device path or NULL. Caller must free the returned value
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*/
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struct efi_device_path *efi_get_dp_from_boot(const efi_guid_t guid)
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{
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struct efi_load_option lo;
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void *var_value;
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efi_uintn_t size;
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efi_status_t ret;
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u16 var_name[16];
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ret = efi_create_current_boot_var(var_name, sizeof(var_name));
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if (ret != EFI_SUCCESS)
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return NULL;
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var_value = efi_get_var(var_name, &efi_global_variable_guid, &size);
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if (!var_value)
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return NULL;
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ret = efi_deserialize_load_option(&lo, var_value, &size);
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if (ret != EFI_SUCCESS)
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goto err;
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return efi_dp_from_lo(&lo, &guid);
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err:
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free(var_value);
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return NULL;
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}
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