src/security/vboot/vbnv.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef __VBOOT_VBNV_H__
   4 #define __VBOOT_VBNV_H__
   5
   6 #include <types.h>
   7
   8 /* Generic functions */
   9 void read_vbnv(uint8_t *vbnv_copy);
  10 void save_vbnv(const uint8_t *vbnv_copy);
  11 int verify_vbnv(uint8_t *vbnv_copy);
  12 void regen_vbnv_crc(uint8_t *vbnv_copy);
  13
  14 /* Read the USB Device Controller(UDC) enable flag from VBNV. */
  15 int vbnv_udc_enable_flag(void);
  16
  17 /* Initialize and read vbnv. This is used in the main vboot logic path. */
  18 void vbnv_init(void);
  19 /* Reset vbnv snapshot to a known state. */
  20 void vbnv_reset(uint8_t *vbnv_copy);
  21
  22 /* CMOS backend */
  23 /* Initialize the vbnv CMOS backing store. The vbnv_copy pointer is used for
  24    optional temporary storage in the init function. */
  25 void vbnv_init_cmos(uint8_t *vbnv_copy);
  26 /* Platform-specific CMOS init function, called by vbnv_init_cmos(). */
  27 void vbnv_platform_init_cmos(void);
  28 /* Return non-zero if CMOS power was lost. */
  29 int vbnv_cmos_failed(void);
  30 void read_vbnv_cmos(uint8_t *vbnv_copy);
  31 void save_vbnv_cmos(const uint8_t *vbnv_copy);
  32
  33 /* Flash backend */
  34 void read_vbnv_flash(uint8_t *vbnv_copy);
  35 void save_vbnv_flash(const uint8_t *vbnv_copy);
  36
  37 /* EC backend */
  38 void read_vbnv_ec(uint8_t *vbnv_copy);
  39 void save_vbnv_ec(const uint8_t *vbnv_copy);
  40
  41 #endif /* __VBOOT_VBNV_H__ */