lib/efi: Add new routines to access efi variables

[petitboot] / lib / efi / efivar.h

diff --git a/lib/efi/efivar.h b/lib/efi/efivar.h
new file mode 100644 (file)
index 0000000..ebf73fa
--- /dev/null
+++ b/lib/efi/efivar.h
@@ -0,0 +1,46 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Copyright (C) 2018 Huaxintong Semiconductor Technology Co.,Ltd. All rights
+ *  reserved.
+ *  Author: Ge Song <ge.song@hxt-semitech.com>
+ */
+#ifndef EFIVAR_H
+#define EFIVAR_H
+
+#include <linux/magic.h>
+#include <stdint.h>
+
+#define EFI_VARIABLE_NON_VOLATILE                           0x00000001
+#define EFI_VARIABLE_BOOTSERVICE_ACCESS                     0x00000002
+#define EFI_VARIABLE_RUNTIME_ACCESS                         0x00000004
+#define EFI_VARIABLE_HARDWARE_ERROR_RECORD                  0x00000008
+#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS             0x00000010
+#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS  0x00000020
+#define EFI_VARIABLE_APPEND_WRITE                           0x00000040
+
+#ifndef EFIVARFS_MAGIC
+#define EFIVARFS_MAGIC 0xde5e81e4
+#endif
+
+void set_efivarfs_path(const char *path);
+const char *get_efivarfs_path(void);
+
+int efi_get_variable(void *ctx, const char *guidstr, const char *name,
+               uint8_t **data, size_t *data_size, uint32_t *attributes);
+int efi_set_variable(void *ctx, const char *guidstr, const char *name,
+               uint8_t *data, size_t data_size, uint32_t attributes);
+int efi_del_variable(void *ctx, const char *guidstr, const char *name);
+
+#endif /* EFIVAR_H */