blob: cc39e6bf5699d314836509be177e714c9f577801 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2010-2015 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <command.h>
#include <config.h>
#include <fuse.h>
#include <mapmem.h>
#include <image.h>
#include <asm/io.h>
#include <asm/global_data.h>
#include <asm/system.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/hab.h>
#include <linux/arm-smccc.h>
DECLARE_GLOBAL_DATA_PTR;
#define ALIGN_SIZE 0x1000
#define MX6DQ_PU_IROM_MMU_EN_VAR 0x009024a8
#define MX6DLS_PU_IROM_MMU_EN_VAR 0x00901dd0
#define MX6SL_PU_IROM_MMU_EN_VAR 0x00901c60
#define IS_HAB_ENABLED_BIT \
(is_soc_type(MXC_SOC_MX7ULP) ? 0x80000000 : \
((is_soc_type(MXC_SOC_MX7) || is_soc_type(MXC_SOC_IMX8M)) ? 0x2000000 : 0x2))
#ifdef CONFIG_MX7ULP
#define HAB_M4_PERSISTENT_START ((soc_rev() >= CHIP_REV_2_0) ? 0x20008040 : \
0x20008180)
#define HAB_M4_PERSISTENT_BYTES 0xB80
#endif
static int ivt_header_error(const char *err_str, struct ivt_header *ivt_hdr)
{
printf("%s magic=0x%x length=0x%02x version=0x%x\n", err_str,
ivt_hdr->magic, ivt_hdr->length, ivt_hdr->version);
return 1;
}
static int verify_ivt_header(struct ivt_header *ivt_hdr)
{
int result = 0;
if (ivt_hdr->magic != IVT_HEADER_MAGIC)
result = ivt_header_error("bad magic", ivt_hdr);
if (be16_to_cpu(ivt_hdr->length) != IVT_TOTAL_LENGTH)
result = ivt_header_error("bad length", ivt_hdr);
if ((ivt_hdr->version & HAB_MAJ_MASK) != HAB_MAJ_VER)
result = ivt_header_error("bad version", ivt_hdr);
return result;
}
#ifdef CONFIG_ARM64
#define FSL_SIP_HAB 0xC2000007
#define FSL_SIP_HAB_AUTHENTICATE 0x00
#define FSL_SIP_HAB_ENTRY 0x01
#define FSL_SIP_HAB_EXIT 0x02
#define FSL_SIP_HAB_REPORT_EVENT 0x03
#define FSL_SIP_HAB_REPORT_STATUS 0x04
#define FSL_SIP_HAB_FAILSAFE 0x05
#define FSL_SIP_HAB_CHECK_TARGET 0x06
static volatile gd_t *gd_save;
#endif
static inline void save_gd(void)
{
#ifdef CONFIG_ARM64
gd_save = gd;
#endif
}
static inline void restore_gd(void)
{
#ifdef CONFIG_ARM64
/*
* Make will already error that reserving x18 is not supported at the
* time of writing, clang: error: unknown argument: '-ffixed-x18'
*/
__asm__ volatile("mov x18, %0\n" : : "r" (gd_save));
#endif
}
enum hab_status hab_rvt_report_event(enum hab_status status, u32 index,
u8 *event, size_t *bytes)
{
enum hab_status ret;
hab_rvt_report_event_t *hab_rvt_report_event_func;
struct arm_smccc_res res __maybe_unused;
hab_rvt_report_event_func = (hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_REPORT_EVENT, (unsigned long)index,
(unsigned long)event, (unsigned long)bytes, 0, 0, 0, &res);
return (enum hab_status)res.a0;
}
#endif
save_gd();
ret = hab_rvt_report_event_func(status, index, event, bytes);
restore_gd();
return ret;
}
enum hab_status hab_rvt_report_status(enum hab_config *config, enum hab_state *state)
{
enum hab_status ret;
hab_rvt_report_status_t *hab_rvt_report_status_func;
struct arm_smccc_res res __maybe_unused;
hab_rvt_report_status_func = (hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_REPORT_STATUS, (unsigned long)config,
(unsigned long)state, 0, 0, 0, 0, &res);
return (enum hab_status)res.a0;
}
#endif
save_gd();
ret = hab_rvt_report_status_func(config, state);
restore_gd();
return ret;
}
enum hab_status hab_rvt_entry(void)
{
enum hab_status ret;
hab_rvt_entry_t *hab_rvt_entry_func;
struct arm_smccc_res res __maybe_unused;
hab_rvt_entry_func = (hab_rvt_entry_t *)HAB_RVT_ENTRY;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_ENTRY, 0, 0, 0, 0, 0, 0, &res);
return (enum hab_status)res.a0;
}
#endif
save_gd();
ret = hab_rvt_entry_func();
restore_gd();
return ret;
}
enum hab_status hab_rvt_exit(void)
{
enum hab_status ret;
hab_rvt_exit_t *hab_rvt_exit_func;
struct arm_smccc_res res __maybe_unused;
hab_rvt_exit_func = (hab_rvt_exit_t *)HAB_RVT_EXIT;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_EXIT, 0, 0, 0, 0, 0, 0, &res);
return (enum hab_status)res.a0;
}
#endif
save_gd();
ret = hab_rvt_exit_func();
restore_gd();
return ret;
}
void hab_rvt_failsafe(void)
{
hab_rvt_failsafe_t *hab_rvt_failsafe_func;
hab_rvt_failsafe_func = (hab_rvt_failsafe_t *)HAB_RVT_FAILSAFE;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_FAILSAFE, 0, 0, 0, 0, 0, 0, NULL);
return;
}
#endif
save_gd();
hab_rvt_failsafe_func();
restore_gd();
}
enum hab_status hab_rvt_check_target(enum hab_target type, const void *start,
size_t bytes)
{
enum hab_status ret;
hab_rvt_check_target_t *hab_rvt_check_target_func;
struct arm_smccc_res res __maybe_unused;
hab_rvt_check_target_func = (hab_rvt_check_target_t *)HAB_RVT_CHECK_TARGET;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_CHECK_TARGET, (unsigned long)type,
(unsigned long)start, (unsigned long)bytes, 0, 0, 0, &res);
return (enum hab_status)res.a0;
}
#endif
save_gd();
ret = hab_rvt_check_target_func(type, start, bytes);
restore_gd();
return ret;
}
void *hab_rvt_authenticate_image(uint8_t cid, ptrdiff_t ivt_offset,
void **start, size_t *bytes, hab_loader_callback_f_t loader)
{
void *ret;
hab_rvt_authenticate_image_t *hab_rvt_authenticate_image_func;
struct arm_smccc_res res __maybe_unused;
hab_rvt_authenticate_image_func = (hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE;
#if defined(CONFIG_ARM64)
if (current_el() != 3) {
/* call sip */
arm_smccc_smc(FSL_SIP_HAB, FSL_SIP_HAB_AUTHENTICATE, (unsigned long)ivt_offset,
(unsigned long)start, (unsigned long)bytes, 0, 0, 0, &res);
return (void *)res.a0;
}
#endif
save_gd();
ret = hab_rvt_authenticate_image_func(cid, ivt_offset, start, bytes, loader);
restore_gd();
return ret;
}
#if !defined(CONFIG_SPL_BUILD)
#define MAX_RECORD_BYTES (8*1024) /* 4 kbytes */
struct record {
uint8_t tag; /* Tag */
uint8_t len[2]; /* Length */
uint8_t par; /* Version */
uint8_t contents[MAX_RECORD_BYTES];/* Record Data */
bool any_rec_flag;
};
static char *rsn_str[] = {
"RSN = HAB_RSN_ANY (0x00)\n",
"RSN = HAB_ENG_FAIL (0x30)\n",
"RSN = HAB_INV_ADDRESS (0x22)\n",
"RSN = HAB_INV_ASSERTION (0x0C)\n",
"RSN = HAB_INV_CALL (0x28)\n",
"RSN = HAB_INV_CERTIFICATE (0x21)\n",
"RSN = HAB_INV_COMMAND (0x06)\n",
"RSN = HAB_INV_CSF (0x11)\n",
"RSN = HAB_INV_DCD (0x27)\n",
"RSN = HAB_INV_INDEX (0x0F)\n",
"RSN = HAB_INV_IVT (0x05)\n",
"RSN = HAB_INV_KEY (0x1D)\n",
"RSN = HAB_INV_RETURN (0x1E)\n",
"RSN = HAB_INV_SIGNATURE (0x18)\n",
"RSN = HAB_INV_SIZE (0x17)\n",
"RSN = HAB_MEM_FAIL (0x2E)\n",
"RSN = HAB_OVR_COUNT (0x2B)\n",
"RSN = HAB_OVR_STORAGE (0x2D)\n",
"RSN = HAB_UNS_ALGORITHM (0x12)\n",
"RSN = HAB_UNS_COMMAND (0x03)\n",
"RSN = HAB_UNS_ENGINE (0x0A)\n",
"RSN = HAB_UNS_ITEM (0x24)\n",
"RSN = HAB_UNS_KEY (0x1B)\n",
"RSN = HAB_UNS_PROTOCOL (0x14)\n",
"RSN = HAB_UNS_STATE (0x09)\n",
"RSN = INVALID\n",
NULL
};
static char *sts_str[] = {
"STS = HAB_SUCCESS (0xF0)\n",
"STS = HAB_FAILURE (0x33)\n",
"STS = HAB_WARNING (0x69)\n",
"STS = INVALID\n",
NULL
};
static char *eng_str[] = {
"ENG = HAB_ENG_ANY (0x00)\n",
"ENG = HAB_ENG_SCC (0x03)\n",
"ENG = HAB_ENG_RTIC (0x05)\n",
"ENG = HAB_ENG_SAHARA (0x06)\n",
"ENG = HAB_ENG_CSU (0x0A)\n",
"ENG = HAB_ENG_SRTC (0x0C)\n",
"ENG = HAB_ENG_DCP (0x1B)\n",
"ENG = HAB_ENG_CAAM (0x1D)\n",
"ENG = HAB_ENG_SNVS (0x1E)\n",
"ENG = HAB_ENG_OCOTP (0x21)\n",
"ENG = HAB_ENG_DTCP (0x22)\n",
"ENG = HAB_ENG_ROM (0x36)\n",
"ENG = HAB_ENG_HDCP (0x24)\n",
"ENG = HAB_ENG_RTL (0x77)\n",
"ENG = HAB_ENG_SW (0xFF)\n",
"ENG = INVALID\n",
NULL
};
static char *ctx_str[] = {
"CTX = HAB_CTX_ANY(0x00)\n",
"CTX = HAB_CTX_FAB (0xFF)\n",
"CTX = HAB_CTX_ENTRY (0xE1)\n",
"CTX = HAB_CTX_TARGET (0x33)\n",
"CTX = HAB_CTX_AUTHENTICATE (0x0A)\n",
"CTX = HAB_CTX_DCD (0xDD)\n",
"CTX = HAB_CTX_CSF (0xCF)\n",
"CTX = HAB_CTX_COMMAND (0xC0)\n",
"CTX = HAB_CTX_AUT_DAT (0xDB)\n",
"CTX = HAB_CTX_ASSERT (0xA0)\n",
"CTX = HAB_CTX_EXIT (0xEE)\n",
"CTX = INVALID\n",
NULL
};
static uint8_t hab_statuses[5] = {
HAB_STS_ANY,
HAB_FAILURE,
HAB_WARNING,
HAB_SUCCESS,
-1
};
static uint8_t hab_reasons[26] = {
HAB_RSN_ANY,
HAB_ENG_FAIL,
HAB_INV_ADDRESS,
HAB_INV_ASSERTION,
HAB_INV_CALL,
HAB_INV_CERTIFICATE,
HAB_INV_COMMAND,
HAB_INV_CSF,
HAB_INV_DCD,
HAB_INV_INDEX,
HAB_INV_IVT,
HAB_INV_KEY,
HAB_INV_RETURN,
HAB_INV_SIGNATURE,
HAB_INV_SIZE,
HAB_MEM_FAIL,
HAB_OVR_COUNT,
HAB_OVR_STORAGE,
HAB_UNS_ALGORITHM,
HAB_UNS_COMMAND,
HAB_UNS_ENGINE,
HAB_UNS_ITEM,
HAB_UNS_KEY,
HAB_UNS_PROTOCOL,
HAB_UNS_STATE,
-1
};
static uint8_t hab_contexts[12] = {
HAB_CTX_ANY,
HAB_CTX_FAB,
HAB_CTX_ENTRY,
HAB_CTX_TARGET,
HAB_CTX_AUTHENTICATE,
HAB_CTX_DCD,
HAB_CTX_CSF,
HAB_CTX_COMMAND,
HAB_CTX_AUT_DAT,
HAB_CTX_ASSERT,
HAB_CTX_EXIT,
-1
};
static uint8_t hab_engines[16] = {
HAB_ENG_ANY,
HAB_ENG_SCC,
HAB_ENG_RTIC,
HAB_ENG_SAHARA,
HAB_ENG_CSU,
HAB_ENG_SRTC,
HAB_ENG_DCP,
HAB_ENG_CAAM,
HAB_ENG_SNVS,
HAB_ENG_OCOTP,
HAB_ENG_DTCP,
HAB_ENG_ROM,
HAB_ENG_HDCP,
HAB_ENG_RTL,
HAB_ENG_SW,
-1
};
static inline uint8_t get_idx(uint8_t *list, uint8_t tgt)
{
uint8_t idx = 0;
uint8_t element = list[idx];
while (element != -1) {
if (element == tgt)
return idx;
element = list[++idx];
}
return -1;
}
static void process_event_record(uint8_t *event_data, size_t bytes)
{
struct record *rec = (struct record *)event_data;
printf("\n\n%s", sts_str[get_idx(hab_statuses, rec->contents[0])]);
printf("%s", rsn_str[get_idx(hab_reasons, rec->contents[1])]);
printf("%s", ctx_str[get_idx(hab_contexts, rec->contents[2])]);
printf("%s", eng_str[get_idx(hab_engines, rec->contents[3])]);
}
static 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]);
}
process_event_record(event_data, bytes);
}
static 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 (imx_hab_is_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 events */
while (hab_rvt_report_event(HAB_STS_ANY, 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;
}
#ifdef CONFIG_MX7ULP
static int get_record_len(struct record *rec)
{
return (size_t)((rec->len[0] << 8) + (rec->len[1]));
}
static int get_hab_status_m4(void)
{
unsigned int index = 0;
uint8_t event_data[128];
size_t record_len, offset = 0;
enum hab_config config = 0;
enum hab_state state = 0;
if (imx_hab_is_enabled())
puts("\nSecure boot enabled\n");
else
puts("\nSecure boot disabled\n");
/*
* HAB in both A7 and M4 gather the security state
* and configuration of the chip from
* shared SNVS module
*/
hab_rvt_report_status(&config, &state);
printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
config, state);
struct record *rec = (struct record *)(HAB_M4_PERSISTENT_START);
record_len = get_record_len(rec);
/* Check if HAB persistent memory is valid */
if (rec->tag != HAB_TAG_EVT_DEF ||
record_len != sizeof(struct evt_def) ||
(rec->par & HAB_MAJ_MASK) != HAB_MAJ_VER) {
puts("\nERROR: Invalid HAB persistent memory\n");
return 1;
}
/* Parse events in HAB M4 persistent memory region */
while (offset < HAB_M4_PERSISTENT_BYTES) {
rec = (struct record *)(HAB_M4_PERSISTENT_START + offset);
record_len = get_record_len(rec);
if (rec->tag == HAB_TAG_EVT) {
memcpy(&event_data, rec, record_len);
puts("\n");
printf("--------- HAB Event %d -----------------\n",
index + 1);
puts("event data:\n");
display_event(event_data, record_len);
puts("\n");
index++;
}
offset += record_len;
/* Ensure all records start on a word boundary */
if ((offset % 4) != 0)
offset = offset + (4 - (offset % 4));
}
if (!index)
puts("No HAB Events Found!\n\n");
return 0;
}
#endif
static int do_hab_status(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
#ifdef CONFIG_MX7ULP
if ((argc > 2)) {
cmd_usage(cmdtp);
return 1;
}
if (strcmp("m4", argv[1]) == 0)
get_hab_status_m4();
else
get_hab_status();
#else
if ((argc != 1)) {
cmd_usage(cmdtp);
return 1;
}
get_hab_status();
#endif
return 0;
}
static ulong get_image_ivt_offset(ulong img_addr)
{
const void *buf;
buf = map_sysmem(img_addr, 0);
switch (genimg_get_format(buf)) {
#if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
case IMAGE_FORMAT_LEGACY:
return (image_get_image_size((image_header_t *)img_addr)
+ 0x1000 - 1) & ~(0x1000 - 1);
#endif
#if IMAGE_ENABLE_FIT
case IMAGE_FORMAT_FIT:
return (fit_get_size(buf) + 0x1000 - 1) & ~(0x1000 - 1);
#endif
default:
return 0;
}
}
static int do_authenticate_image(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr, length, ivt_offset;
int rcode = 0;
if (argc < 3)
return CMD_RET_USAGE;
addr = hextoul(argv[1], NULL);
length = hextoul(argv[2], NULL);
if (argc == 3)
ivt_offset = get_image_ivt_offset(addr);
else
ivt_offset = hextoul(argv[3], NULL);
rcode = imx_hab_authenticate_image(addr, length, ivt_offset);
if (rcode == 0)
rcode = CMD_RET_SUCCESS;
else
rcode = CMD_RET_FAILURE;
return rcode;
}
static int do_hab_failsafe(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
if (argc != 1) {
cmd_usage(cmdtp);
return 1;
}
hab_rvt_failsafe();
return 0;
}
static int do_hab_version(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct hab_hdr *hdr = (struct hab_hdr *)HAB_RVT_BASE;
if (hdr->tag != HAB_TAG_RVT) {
printf("Unexpected header tag: %x\n", hdr->tag);
return CMD_RET_FAILURE;
}
printf("HAB version: %d.%d\n", hdr->par >> 4, hdr->par & 0xf);
return 0;
}
static int do_authenticate_image_or_failover(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int ret = CMD_RET_FAILURE;
if (argc != 4) {
ret = CMD_RET_USAGE;
goto error;
}
if (!imx_hab_is_enabled()) {
printf("error: secure boot disabled\n");
goto error;
}
if (do_authenticate_image(NULL, flag, argc, argv) != CMD_RET_SUCCESS) {
fprintf(stderr, "authentication fail -> %s %s %s %s\n",
argv[0], argv[1], argv[2], argv[3]);
do_hab_failsafe(0, 0, 1, NULL);
};
ret = CMD_RET_SUCCESS;
error:
return ret;
}
#ifdef CONFIG_MX7ULP
U_BOOT_CMD(
hab_status, CONFIG_SYS_MAXARGS, 2, do_hab_status,
"display HAB status and events",
"hab_status - A7 HAB event and status\n"
"hab_status m4 - M4 HAB event and status"
);
#else
U_BOOT_CMD(
hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
"display HAB status",
""
);
#endif
U_BOOT_CMD(
hab_auth_img, 4, 0, do_authenticate_image,
"authenticate image via HAB",
"addr length ivt_offset\n"
"addr - image hex address\n"
"length - image hex length\n"
"ivt_offset - hex offset of IVT in the image"
);
U_BOOT_CMD(
hab_failsafe, CONFIG_SYS_MAXARGS, 1, do_hab_failsafe,
"run BootROM failsafe routine",
""
);
U_BOOT_CMD(
hab_auth_img_or_fail, 4, 0,
do_authenticate_image_or_failover,
"authenticate image via HAB on failure drop to USB BootROM mode",
"addr length ivt_offset\n"
"addr - image hex address\n"
"length - image hex length\n"
"ivt_offset - hex offset of IVT in the image"
);
U_BOOT_CMD(
hab_version, 1, 0, do_hab_version,
"print HAB major/minor version",
""
);
#endif /* !defined(CONFIG_SPL_BUILD) */
/* Get CSF Header length */
static int get_hab_hdr_len(struct hab_hdr *hdr)
{
return (size_t)((hdr->len[0] << 8) + (hdr->len[1]));
}
/* Check whether addr lies between start and
* end and is within the length of the image
*/
static int chk_bounds(u8 *addr, size_t bytes, u8 *start, u8 *end)
{
size_t csf_size = (size_t)((end + 1) - addr);
return (addr && (addr >= start) && (addr <= end) &&
(csf_size >= bytes));
}
/* Get Length of each command in CSF */
static int get_csf_cmd_hdr_len(u8 *csf_hdr)
{
if (*csf_hdr == HAB_CMD_HDR)
return sizeof(struct hab_hdr);
return get_hab_hdr_len((struct hab_hdr *)csf_hdr);
}
/* Check if CSF is valid */
static bool csf_is_valid(struct ivt *ivt, ulong start_addr, size_t bytes)
{
u8 *start = (u8 *)start_addr;
u8 *csf_hdr;
u8 *end;
size_t csf_hdr_len;
size_t cmd_hdr_len;
size_t offset = 0;
if (bytes != 0)
end = start + bytes - 1;
else
end = start;
/* Verify if CSF pointer content is zero */
if (!ivt->csf) {
puts("Error: CSF pointer is NULL\n");
return false;
}
csf_hdr = (u8 *)(ulong)ivt->csf;
/* Verify if CSF Header exist */
if (*csf_hdr != HAB_CMD_HDR) {
puts("Error: CSF header command not found\n");
return false;
}
csf_hdr_len = get_hab_hdr_len((struct hab_hdr *)csf_hdr);
/* Check if the CSF lies within the image bounds */
if (!chk_bounds(csf_hdr, csf_hdr_len, start, end)) {
puts("Error: CSF lies outside the image bounds\n");
return false;
}
do {
struct hab_hdr *cmd;
cmd = (struct hab_hdr *)&csf_hdr[offset];
switch (cmd->tag) {
case (HAB_CMD_WRT_DAT):
puts("Error: Deprecated write command found\n");
return false;
case (HAB_CMD_CHK_DAT):
puts("Error: Deprecated check command found\n");
return false;
case (HAB_CMD_SET):
if (cmd->par == HAB_PAR_MID) {
puts("Error: Deprecated Set MID command found\n");
return false;
}
default:
break;
}
cmd_hdr_len = get_csf_cmd_hdr_len(&csf_hdr[offset]);
if (!cmd_hdr_len) {
puts("Error: Invalid command length\n");
return false;
}
offset += cmd_hdr_len;
} while (offset < csf_hdr_len);
return true;
}
/*
* Validate IVT structure of the image being authenticated
*/
static int validate_ivt(struct ivt *ivt_initial)
{
struct ivt_header *ivt_hdr = &ivt_initial->hdr;
if ((ulong)ivt_initial & 0x3) {
puts("Error: Image's start address is not 4 byte aligned\n");
return 0;
}
/* Check IVT fields before allowing authentication */
if ((!verify_ivt_header(ivt_hdr)) && \
(ivt_initial->entry != 0x0) && \
(ivt_initial->reserved1 == 0x0) && \
(ivt_initial->self == \
(uint32_t)((ulong)ivt_initial & 0xffffffff)) && \
(ivt_initial->csf != 0x0) && \
(ivt_initial->reserved2 == 0x0)) {
/* Report boot failure if DCD pointer is found in IVT */
if (ivt_initial->dcd != 0x0)
puts("Error: DCD pointer must be 0\n");
else
return 1;
}
puts("Error: Invalid IVT structure\n");
debug("\nAllowed IVT structure:\n");
debug("IVT HDR = 0x4X2000D1\n");
debug("IVT ENTRY = 0xXXXXXXXX\n");
debug("IVT RSV1 = 0x0\n");
debug("IVT DCD = 0x0\n"); /* Recommended */
debug("IVT BOOT_DATA = 0xXXXXXXXX\n"); /* Commonly 0x0 */
debug("IVT SELF = 0xXXXXXXXX\n"); /* = ddr_start + ivt_offset */
debug("IVT CSF = 0xXXXXXXXX\n");
debug("IVT RSV2 = 0x0\n");
/* Invalid IVT structure */
return 0;
}
bool imx_hab_is_enabled(void)
{
struct imx_sec_config_fuse_t *fuse =
(struct imx_sec_config_fuse_t *)&imx_sec_config_fuse;
uint32_t reg;
int ret;
ret = fuse_read(fuse->bank, fuse->word, &reg);
if (ret) {
puts("\nSecure boot fuse read error\n");
return ret;
}
return (reg & IS_HAB_ENABLED_BIT) == IS_HAB_ENABLED_BIT;
}
int imx_hab_authenticate_image(uint32_t ddr_start, uint32_t image_size,
uint32_t ivt_offset)
{
ulong load_addr = 0;
size_t bytes;
ulong ivt_addr = 0;
int result = 1;
ulong start;
struct ivt *ivt;
enum hab_status status;
if (!imx_hab_is_enabled())
puts("hab fuse not enabled\n");
printf("\nAuthenticate image from DDR location 0x%x...\n",
ddr_start);
hab_caam_clock_enable(1);
/* Calculate IVT address header */
ivt_addr = (ulong) (ddr_start + ivt_offset);
ivt = (struct ivt *)ivt_addr;
/* Verify IVT header bugging out on error */
if (!validate_ivt(ivt))
goto hab_authentication_exit;
start = ddr_start;
bytes = image_size;
/* Verify CSF */
if (!csf_is_valid(ivt, start, bytes))
goto hab_authentication_exit;
if (hab_rvt_entry() != HAB_SUCCESS) {
puts("hab entry function fail\n");
goto hab_exit_failure_print_status;
}
status = hab_rvt_check_target(HAB_TGT_MEMORY, (void *)(ulong)ddr_start, bytes);
if (status != HAB_SUCCESS) {
printf("HAB check target 0x%08x-0x%08lx fail\n",
ddr_start, ddr_start + (ulong)bytes);
goto hab_exit_failure_print_status;
}
#ifdef DEBUG
printf("\nivt_offset = 0x%x, ivt addr = 0x%lx\n", ivt_offset, ivt_addr);
printf("ivt entry = 0x%08x, dcd = 0x%08x, csf = 0x%08x\n", ivt->entry,
ivt->dcd, ivt->csf);
puts("Dumping IVT\n");
print_buffer(ivt_addr, (void *)(ivt_addr), 4, 0x8, 0);
puts("Dumping CSF Header\n");
print_buffer(ivt->csf, (void *)(ivt->csf), 4, 0x10, 0);
#if !defined(CONFIG_SPL_BUILD)
get_hab_status();
#endif
puts("\nCalling authenticate_image in ROM\n");
printf("\tivt_offset = 0x%x\n", ivt_offset);
printf("\tstart = 0x%08lx\n", start);
printf("\tbytes = 0x%x\n", bytes);
#endif
#ifndef CONFIG_ARM64
/*
* If the MMU is enabled, we have to notify the ROM
* code, or it won't flush the caches when needed.
* This is done, by setting the "pu_irom_mmu_enabled"
* word to 1. You can find its address by looking in
* the ROM map. This is critical for
* authenticate_image(). If MMU is enabled, without
* setting this bit, authentication will fail and may
* crash.
*/
/* Check MMU enabled */
if (is_soc_type(MXC_SOC_MX6) && get_cr() & CR_M) {
if (is_mx6dq()) {
/*
* This won't work on Rev 1.0.0 of
* i.MX6Q/D, since their ROM doesn't
* do cache flushes. don't think any
* exist, so we ignore them.
*/
if (!is_mx6dqp())
writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
} else if (is_mx6sdl()) {
writel(1, MX6DLS_PU_IROM_MMU_EN_VAR);
} else if (is_mx6sl()) {
writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
}
}
#endif
load_addr = (ulong)hab_rvt_authenticate_image(
HAB_CID_UBOOT,
ivt_offset, (void **)&start,
(size_t *)&bytes, NULL);
if (hab_rvt_exit() != HAB_SUCCESS) {
puts("hab exit function fail\n");
load_addr = 0;
}
hab_exit_failure_print_status:
#if !defined(CONFIG_SPL_BUILD)
get_hab_status();
#endif
hab_authentication_exit:
if (load_addr != 0 || !imx_hab_is_enabled())
result = 0;
return result;
}
int authenticate_image(u32 ddr_start, u32 raw_image_size)
{
u32 ivt_offset;
size_t bytes;
ivt_offset = (raw_image_size + ALIGN_SIZE - 1) &
~(ALIGN_SIZE - 1);
bytes = ivt_offset + IVT_SIZE + CSF_PAD_SIZE;
return imx_hab_authenticate_image(ddr_start, bytes, ivt_offset);
}