mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
db61e70e0d
The 'efidebug boot dump' command should not display the VenMedia() device path node preceding the device path of the initial ram disk. By letting efi_dp_from_lo() skip the VenMedia() device path node we can simplify the coding. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2020, Linaro Limited
|
|
*/
|
|
|
|
#define LOG_CATEGORY LOGC_EFI
|
|
#include <common.h>
|
|
#include <env.h>
|
|
#include <malloc.h>
|
|
#include <dm.h>
|
|
#include <fs.h>
|
|
#include <efi_load_initrd.h>
|
|
#include <efi_loader.h>
|
|
#include <efi_variable.h>
|
|
|
|
#if defined(CONFIG_CMD_EFIDEBUG) || defined(CONFIG_EFI_LOAD_FILE2_INITRD)
|
|
/* GUID used by Linux to identify the LoadFile2 protocol with the initrd */
|
|
const efi_guid_t efi_lf2_initrd_guid = EFI_INITRD_MEDIA_GUID;
|
|
#endif
|
|
|
|
/**
|
|
* efi_create_current_boot_var() - Return Boot#### name were #### is replaced by
|
|
* the value of BootCurrent
|
|
*
|
|
* @var_name: variable name
|
|
* @var_name_size: size of var_name
|
|
*
|
|
* Return: Status code
|
|
*/
|
|
static efi_status_t efi_create_current_boot_var(u16 var_name[],
|
|
size_t var_name_size)
|
|
{
|
|
efi_uintn_t boot_current_size;
|
|
efi_status_t ret;
|
|
u16 boot_current;
|
|
u16 *pos;
|
|
|
|
boot_current_size = sizeof(boot_current);
|
|
ret = efi_get_variable_int(L"BootCurrent",
|
|
&efi_global_variable_guid, NULL,
|
|
&boot_current_size, &boot_current, NULL);
|
|
if (ret != EFI_SUCCESS)
|
|
goto out;
|
|
|
|
pos = efi_create_indexed_name(var_name, var_name_size, "Boot",
|
|
boot_current);
|
|
if (!pos) {
|
|
ret = EFI_OUT_OF_RESOURCES;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_get_dp_from_boot() - Retrieve and return a device path from an EFI
|
|
* Boot### variable.
|
|
* A boot option may contain an array of device paths.
|
|
* We use a VenMedia() with a specific GUID to identify
|
|
* the usage of the array members. This function is
|
|
* used to extract a specific device path
|
|
*
|
|
* @guid: vendor GUID of the VenMedia() device path node identifying the
|
|
* device path
|
|
*
|
|
* Return: device path or NULL. Caller must free the returned value
|
|
*/
|
|
struct efi_device_path *efi_get_dp_from_boot(const efi_guid_t guid)
|
|
{
|
|
struct efi_load_option lo;
|
|
void *var_value;
|
|
efi_uintn_t size;
|
|
efi_status_t ret;
|
|
u16 var_name[16];
|
|
|
|
ret = efi_create_current_boot_var(var_name, sizeof(var_name));
|
|
if (ret != EFI_SUCCESS)
|
|
return NULL;
|
|
|
|
var_value = efi_get_var(var_name, &efi_global_variable_guid, &size);
|
|
if (!var_value)
|
|
return NULL;
|
|
|
|
ret = efi_deserialize_load_option(&lo, var_value, &size);
|
|
if (ret != EFI_SUCCESS)
|
|
goto err;
|
|
|
|
return efi_dp_from_lo(&lo, &guid);
|
|
|
|
err:
|
|
free(var_value);
|
|
return NULL;
|
|
}
|