hab.c

/*
 * Copyright (C) 2010-2013 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:    GPL-2.0+
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/hab.h>
#include <asm/arch/sys_proto.h>

/* -------- start of HAB API updates ------------*/

#define hab_rvt_report_event_p					\
(								\
	((is_cpu_type(MXC_CPU_MX6Q) ||				\
	  is_cpu_type(MXC_CPU_MX6D)) &&				\
	  (soc_rev() >= CHIP_REV_1_5)) ?			\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :	\
	(is_cpu_type(MXC_CPU_MX6DL) &&				\
	 (soc_rev() >= CHIP_REV_1_2)) ?				\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :	\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT)	\
)

#define hab_rvt_report_status_p					\
(								\
	((is_cpu_type(MXC_CPU_MX6Q) ||				\
	  is_cpu_type(MXC_CPU_MX6D)) &&				\
	  (soc_rev() >= CHIP_REV_1_5)) ?			\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
	(is_cpu_type(MXC_CPU_MX6DL) &&				\
	 (soc_rev() >= CHIP_REV_1_2)) ?				\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS)	\
)

#define hab_rvt_authenticate_image_p				\
(								\
	((is_cpu_type(MXC_CPU_MX6Q) ||				\
	  is_cpu_type(MXC_CPU_MX6D)) &&				\
	  (soc_rev() >= CHIP_REV_1_5)) ?			\
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
	(is_cpu_type(MXC_CPU_MX6DL) &&				\
	 (soc_rev() >= CHIP_REV_1_2)) ?				\
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE)	\
)

#define hab_rvt_entry_p						\
(								\
	((is_cpu_type(MXC_CPU_MX6Q) ||				\
	  is_cpu_type(MXC_CPU_MX6D)) &&				\
	  (soc_rev() >= CHIP_REV_1_5)) ?			\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :		\
	(is_cpu_type(MXC_CPU_MX6DL) &&				\
	 (soc_rev() >= CHIP_REV_1_2)) ?				\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :		\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY)			\
)

#define hab_rvt_exit_p						\
(								\
	((is_cpu_type(MXC_CPU_MX6Q) ||				\
	  is_cpu_type(MXC_CPU_MX6D)) &&				\
	  (soc_rev() >= CHIP_REV_1_5)) ?			\
	((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :			\
	(is_cpu_type(MXC_CPU_MX6DL) &&				\
	 (soc_rev() >= CHIP_REV_1_2)) ?				\
	((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :			\
	((hab_rvt_exit_t *)HAB_RVT_EXIT)			\
)

bool is_hab_enabled(void)
{
	struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
	struct fuse_bank *bank = &ocotp->bank[0];
	struct fuse_bank0_regs *fuse =
		(struct fuse_bank0_regs *)bank->fuse_regs;
	uint32_t reg = readl(&fuse->cfg5);

	return (reg & 0x2) == 0x2;
}

void display_event(uint8_t *event_data, size_t bytes)
{
	uint32_t i;

	if (!(event_data && bytes > 0))
		return;

	for (i = 0; i < bytes; i++) {
		if (i == 0)
			printf("\t0x%02x", event_data[i]);
		else if ((i % 8) == 0)
			printf("\n\t0x%02x", event_data[i]);
		else
			printf(" 0x%02x", event_data[i]);
	}
}

int get_hab_status(void)
{
	uint32_t index = 0; /* Loop index */
	uint8_t event_data[128]; /* Event data buffer */
	size_t bytes = sizeof(event_data); /* Event size in bytes */
	enum hab_config config = 0;
	enum hab_state state = 0;
	hab_rvt_report_event_t *hab_rvt_report_event;
	hab_rvt_report_status_t *hab_rvt_report_status;

	hab_rvt_report_event = hab_rvt_report_event_p;
	hab_rvt_report_status = hab_rvt_report_status_p;

	if (is_hab_enabled())
		puts("\nSecure boot enabled\n");
	else
		puts("\nSecure boot disabled\n");

	/* Check HAB status */
	if (hab_rvt_report_status(&config, &state) != HAB_SUCCESS) {
		printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
		       config, state);

		/* Display HAB Error events */
		while (hab_rvt_report_event(HAB_FAILURE, index, event_data,
					&bytes) == HAB_SUCCESS) {
			puts("\n");
			printf("--------- HAB Event %d -----------------\n",
			       index + 1);
			puts("event data:\n");
			display_event(event_data, bytes);
			puts("\n");
			bytes = sizeof(event_data);
			index++;
		}
	}
	/* Display message if no HAB events are found */
	else {
		printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
		       config, state);
		puts("No HAB Events Found!\n\n");
	}
	return 0;
}

int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	if ((argc != 1)) {
		cmd_usage(cmdtp);
		return 1;
	}

	get_hab_status();

	return 0;
}

U_BOOT_CMD(
		hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
		"display HAB status",
		""
	  );