From b83c709e8d3f29721f32d66f19f953a2f818afbc Mon Sep 17 00:00:00 2001 From: Stefano Babic Date: Fri, 28 Jun 2013 00:20:21 +0200 Subject: imx: add status reporting for HAB status Add functions to report the HAB (High Assurance Boot) status of e.g. i.MX6 CPUs. This is taken from git://git.freescale.com/imx/uboot-imx.git branch imx_v2009.08_3.0.35_4.0.0 cpu/arm_cortexa8/mx6/generic.c include/asm-arm/arch-mx6/mx6_secure.h Signed-off-by: Stefano Babic --- arch/arm/cpu/armv7/mx6/hab.c | 104 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 arch/arm/cpu/armv7/mx6/hab.c (limited to 'arch/arm/cpu/armv7/mx6/hab.c') diff --git a/arch/arm/cpu/armv7/mx6/hab.c b/arch/arm/cpu/armv7/mx6/hab.c new file mode 100644 index 0000000000..5187775365 --- /dev/null +++ b/arch/arm/cpu/armv7/mx6/hab.c @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include + +/* -------- start of HAB API updates ------------*/ +#define hab_rvt_report_event ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT) +#define hab_rvt_report_status ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS) +#define hab_rvt_authenticate_image \ + ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE) +#define hab_rvt_entry ((hab_rvt_entry_t *)HAB_RVT_ENTRY) +#define hab_rvt_exit ((hab_rvt_exit_t *)HAB_RVT_EXIT) +#define hab_rvt_clock_init HAB_RVT_CLOCK_INIT + +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; + + 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", + "" + ); -- cgit v1.2.1