arch/arm/cpu/armv7/mx6/hab.c

   1 /*
   2  * Copyright (C) 2010-2013 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:    GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <asm/arch/hab.h>
  10
  11 /* -------- start of HAB API updates ------------*/
  12 #define hab_rvt_report_event ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT)
  13 #define hab_rvt_report_status ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS)
  14 #define hab_rvt_authenticate_image \
  15         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE)
  16 #define hab_rvt_entry ((hab_rvt_entry_t *)HAB_RVT_ENTRY)
  17 #define hab_rvt_exit ((hab_rvt_exit_t *)HAB_RVT_EXIT)
  18 #define hab_rvt_clock_init HAB_RVT_CLOCK_INIT
  19
  20 bool is_hab_enabled(void)
  21 {
  22         struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
  23         struct fuse_bank *bank = &ocotp->bank[0];
  24         struct fuse_bank0_regs *fuse =
  25                 (struct fuse_bank0_regs *)bank->fuse_regs;
  26         uint32_t reg = readl(&fuse->cfg5);
  27
  28         return (reg & 0x2) == 0x2;
  29 }
  30
  31 void display_event(uint8_t *event_data, size_t bytes)
  32 {
  33         uint32_t i;
  34
  35         if (!(event_data && bytes > 0))
  36                 return;
  37
  38         for (i = 0; i < bytes; i++) {
  39                 if (i == 0)
  40                         printf("\t0x%02x", event_data[i]);
  41                 else if ((i % 8) == 0)
  42                         printf("\n\t0x%02x", event_data[i]);
  43                 else
  44                         printf(" 0x%02x", event_data[i]);
  45         }
  46 }
  47
  48 int get_hab_status(void)
  49 {
  50         uint32_t index = 0; /* Loop index */
  51         uint8_t event_data[128]; /* Event data buffer */
  52         size_t bytes = sizeof(event_data); /* Event size in bytes */
  53         enum hab_config config = 0;
  54         enum hab_state state = 0;
  55
  56         if (is_hab_enabled())
  57                 puts("\nSecure boot enabled\n");
  58         else
  59                 puts("\nSecure boot disabled\n");
  60
  61         /* Check HAB status */
  62         if (hab_rvt_report_status(&config, &state) != HAB_SUCCESS) {
  63                 printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
  64                        config, state);
  65
  66                 /* Display HAB Error events */
  67                 while (hab_rvt_report_event(HAB_FAILURE, index, event_data,
  68                                         &bytes) == HAB_SUCCESS) {
  69                         puts("\n");
  70                         printf("--------- HAB Event %d -----------------\n",
  71                                index + 1);
  72                         puts("event data:\n");
  73                         display_event(event_data, bytes);
  74                         puts("\n");
  75                         bytes = sizeof(event_data);
  76                         index++;
  77                 }
  78         }
  79         /* Display message if no HAB events are found */
  80         else {
  81                 printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
  82                        config, state);
  83                 puts("No HAB Events Found!\n\n");
  84         }
  85         return 0;
  86 }
  87
  88 int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  89 {
  90         if ((argc != 1)) {
  91                 cmd_usage(cmdtp);
  92                 return 1;
  93         }
  94
  95         get_hab_status();
  96
  97         return 0;
  98 }
  99
 100 U_BOOT_CMD(
 101                 hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
 102                 "display HAB status",
 103                 ""
 104           );