45d7da5640
GBL needs to read an UEFI variable called "gbl_debug". We add 2 commands. "uefi_set_var" to set an UEFI variable. And "uefi_list_var" to list the UEFI variables. For GBL, we can use "uefi_set_var gbl_debug 1" to enable its debug mode. Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/*
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* Copyright (C) 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#ifndef __VARIABLE_MEM_
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#define __VARIABLE_MEM_
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#include <uefi/types.h>
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static constexpr auto EFI_GLOBAL_VARIABLE_GUID =
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EfiGuid{0x8be4df61,
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0x93ca,
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0x11d2,
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{0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c}};
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static constexpr uint32_t EFI_VARIABLE_NON_VOLATILE = 0x01;
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static constexpr uint32_t EFI_VARIABLE_BOOTSERVICE_ACCESS = 0x02;
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static constexpr uint32_t EFI_VARIABLE_RUNTIME_ACCESS = 0x04;
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static constexpr uint32_t EFI_VARIABLE_HARDWARE_ERROR_RECORD = 0x08;
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EfiStatus efi_get_variable(const char16_t *variable_name,
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const EfiGuid *guid,
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uint32_t *attribute,
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char **data,
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size_t *data_size);
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void efi_set_variable(const char16_t *variable_name,
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const EfiGuid *guid,
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uint32_t attribute,
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const char *data,
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size_t data_len);
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void efi_list_variable(void);
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#endif
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