src/soc/amd/common/block/psp/spl_fuse.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootstate.h>
   4 #include <console/console.h>
   5 #include <types.h>
   6 #include "psp_def.h"
   7
   8 static void psp_set_spl_fuse(void *unused)
   9 {
  10         int cmd_status = 0;
  11         uint32_t c2p38 = 0;
  12         struct mbox_cmd_late_spl_buffer buffer = {
  13                 .header = {
  14                         .size = sizeof(buffer)
  15                 }
  16         };
  17
  18         if (soc_read_c2p38(&c2p38) != CB_SUCCESS) {
  19                 printk(BIOS_ERR, "PSP: Failed to get base address.\n");
  20                 return;
  21         }
  22
  23         if (c2p38 & CORE_2_PSP_MSG_38_FUSE_SPL) {
  24                 printk(BIOS_DEBUG, "PSP: SPL Fusing may be updated.\n");
  25         } else {
  26                 printk(BIOS_DEBUG, "PSP: SPL Fusing not currently required.\n");
  27                 return;
  28         }
  29
  30         if (c2p38 & CORE_2_PSP_MSG_38_SPL_FUSE_ERROR) {
  31                 printk(BIOS_ERR, "PSP: SPL Table does not meet fuse requirements.\n");
  32                 return;
  33         }
  34
  35         if (c2p38 & CORE_2_PSP_MSG_38_SPL_ENTRY_ERROR) {
  36                 printk(BIOS_ERR, "PSP: Critical SPL entry missing or current firmware does"
  37                                    " not meet requirements.\n");
  38                 return;
  39         }
  40
  41         if (c2p38 & CORE_2_PSP_MSG_38_SPL_ENTRY_MISSING) {
  42                 printk(BIOS_ERR, "PSP: Table of critical SPL values is missing.\n");
  43                 return;
  44         }
  45
  46         if (!CONFIG(PERFORM_SPL_FUSING))
  47                 return;
  48
  49         printk(BIOS_DEBUG, "PSP: SPL Fusing Update Requested.\n");
  50         cmd_status = send_psp_command(MBOX_BIOS_CMD_SET_SPL_FUSE, &buffer);
  51         psp_print_cmd_status(cmd_status, NULL);
  52 }
  53
  54 BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_ENTRY, psp_set_spl_fuse, NULL);