aboutsummaryrefslogtreecommitdiff
path: root/src/vendorcode/google/chromeos/vbnv_ec.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/vendorcode/google/chromeos/vbnv_ec.c')
-rw-r--r--src/vendorcode/google/chromeos/vbnv_ec.c86
1 files changed, 3 insertions, 83 deletions
diff --git a/src/vendorcode/google/chromeos/vbnv_ec.c b/src/vendorcode/google/chromeos/vbnv_ec.c
index 6e1b0c5f70..0b7b7b5b68 100644
--- a/src/vendorcode/google/chromeos/vbnv_ec.c
+++ b/src/vendorcode/google/chromeos/vbnv_ec.c
@@ -14,96 +14,16 @@
*/
#include <types.h>
-#include <string.h>
-#include <console/console.h>
-#include <arch/early_variables.h>
#include <ec/google/chromeec/ec.h>
-#include "chromeos.h"
+#include "vbnv.h"
#include "vbnv_layout.h"
-static int vbnv_initialized CAR_GLOBAL;
-static uint8_t vbnv[VBNV_BLOCK_SIZE] CAR_GLOBAL;
-
-/* Wrappers for accessing the variables marked as CAR_GLOBAL. */
-static inline int is_vbnv_initialized(void)
-{
- return car_get_var(vbnv_initialized);
-}
-
-static inline uint8_t *vbnv_data_addr(int index)
-{
- uint8_t *vbnv_arr = car_get_var_ptr(vbnv);
-
- return &vbnv_arr[index];
-}
-
-static inline uint8_t vbnv_data(int index)
-{
- return *vbnv_data_addr(index);
-}
-
-/* Return CRC-8 of the data, using x^8 + x^2 + x + 1 polynomial. A
- * table-based algorithm would be faster, but for only 15 bytes isn't
- * worth the code size.
- */
-
-static uint8_t crc8(const uint8_t * data, int len)
-{
- unsigned crc = 0;
- int i, j;
-
- for (j = len; j; j--, data++) {
- crc ^= (*data << 8);
- for (i = 8; i; i--) {
- if (crc & 0x8000)
- crc ^= (0x1070 << 3);
- crc <<= 1;
- }
- }
-
- return (uint8_t) (crc >> 8);
-}
-
-void read_vbnv(uint8_t *vbnv_copy)
+void read_vbnv_ec(uint8_t *vbnv_copy)
{
google_chromeec_vbnv_context(1, vbnv_copy, VBNV_BLOCK_SIZE);
-
- /* Check data for consistency */
- if ((HEADER_SIGNATURE != (vbnv_copy[HEADER_OFFSET] & HEADER_MASK))
- || (crc8(vbnv_copy, CRC_OFFSET) != vbnv_copy[CRC_OFFSET])) {
-
- /* Data is inconsistent (bad CRC or header),
- * so reset to defaults
- */
- memset(vbnv_copy, 0, VBNV_BLOCK_SIZE);
- vbnv_copy[HEADER_OFFSET] =
- (HEADER_SIGNATURE | HEADER_FIRMWARE_SETTINGS_RESET |
- HEADER_KERNEL_SETTINGS_RESET);
- }
}
-void save_vbnv(const uint8_t *vbnv_copy)
+void save_vbnv_ec(const uint8_t *vbnv_copy)
{
google_chromeec_vbnv_context(0, (uint8_t *)vbnv_copy, VBNV_BLOCK_SIZE);
}
-
-static void vbnv_setup(void)
-{
- read_vbnv(vbnv_data_addr(0));
- car_set_var(vbnv_initialized, 1);
-}
-
-int get_recovery_mode_from_vbnv(void)
-{
- if (!is_vbnv_initialized())
- vbnv_setup();
- return vbnv_data(RECOVERY_OFFSET);
-}
-
-int vboot_wants_oprom(void)
-{
- if (!is_vbnv_initialized())
- vbnv_setup();
-
- return (vbnv_data(BOOT_OFFSET) & BOOT_OPROM_NEEDED) ? 1 : 0;
-}