imx: hab: rework secure boot support for imx6

Rework secure boot support for imx6, move existing hab support
for imx6 into imx-common for SoC reuse.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>

1 files changed, 502 insertions, 0 deletions

diff --git a/arch/arm/imx-common/hab.c b/arch/arm/imx-common/hab.c
new file mode 100644
index 0000000000..9ee0f12a66
--- /dev/null
+++ b/arch/arm/imx-common/hab.c
@@ -0,0 +1,502 @@
+/*
+ * Copyright (C) 2010-2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/imx-common/hab.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)			\
+)
+
+#define IVT_SIZE		0x20
+#define ALIGN_SIZE		0x1000
+#define CSF_PAD_SIZE		0x2000
+#define MX6DQ_PU_IROM_MMU_EN_VAR	0x009024a8
+#define MX6DLS_PU_IROM_MMU_EN_VAR	0x00901dd0
+#define MX6SL_PU_IROM_MMU_EN_VAR	0x00900a18
+
+/*
+ * +------------+  0x0 (DDR_UIMAGE_START) -
+ * |   Header   |                          |
+ * +------------+  0x40                    |
+ * |            |                          |
+ * |            |                          |
+ * |            |                          |
+ * |            |                          |
+ * | Image Data |                          |
+ * .            |                          |
+ * .            |                           > Stuff to be authenticated ----+
+ * .            |                          |                                |
+ * |            |                          |                                |
+ * |            |                          |                                |
+ * +------------+                          |                                |
+ * |            |                          |                                |
+ * | Fill Data  |                          |                                |
+ * |            |                          |                                |
+ * +------------+ Align to ALIGN_SIZE      |                                |
+ * |    IVT     |                          |                                |
+ * +------------+ + IVT_SIZE              -                                 |
+ * |            |                                                           |
+ * |  CSF DATA  | <---------------------------------------------------------+
+ * |            |
+ * +------------+
+ * |            |
+ * | Fill Data  |
+ * |            |
+ * +------------+ + CSF_PAD_SIZE
+ */
+
+#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;
+};
+
+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};
+
+char *sts_str[] = {"STS = HAB_SUCCESS (0xF0)\n",
+				   "STS = HAB_FAILURE (0x33)\n",
+				   "STS = HAB_WARNING (0x69)\n",
+				   "STS = INVALID\n",
+				   NULL};
+
+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};
+
+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};
+
+uint8_t hab_statuses[5] = {
+	HAB_STS_ANY,
+	HAB_FAILURE,
+	HAB_WARNING,
+	HAB_SUCCESS,
+	-1
+};
+
+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
+};
+
+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
+};
+
+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
+};
+
+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;
+}
+
+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;
+}
+
+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])]);
+}
+
+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);
+}
+
+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;
+}
+
+uint32_t authenticate_image(uint32_t ddr_start, uint32_t image_size)
+{
+	uint32_t load_addr = 0;
+	size_t bytes;
+	ptrdiff_t ivt_offset = 0;
+	int result = 0;
+	ulong start;
+	hab_rvt_authenticate_image_t *hab_rvt_authenticate_image;
+	hab_rvt_entry_t *hab_rvt_entry;
+	hab_rvt_exit_t *hab_rvt_exit;
+
+	hab_rvt_authenticate_image = hab_rvt_authenticate_image_p;
+	hab_rvt_entry = hab_rvt_entry_p;
+	hab_rvt_exit = hab_rvt_exit_p;
+
+	if (is_hab_enabled()) {
+		printf("\nAuthenticate image from DDR location 0x%x...\n",
+		       ddr_start);
+
+		hab_caam_clock_enable(1);
+
+		if (hab_rvt_entry() == HAB_SUCCESS) {
+			/* If not already aligned, Align to ALIGN_SIZE */
+			ivt_offset = (image_size + ALIGN_SIZE - 1) &
+					~(ALIGN_SIZE - 1);
+
+			start = ddr_start;
+			bytes = ivt_offset + IVT_SIZE + CSF_PAD_SIZE;
+#ifdef DEBUG
+			printf("\nivt_offset = 0x%x, ivt addr = 0x%x\n",
+			       ivt_offset, ddr_start + ivt_offset);
+			puts("Dumping IVT\n");
+			print_buffer(ddr_start + ivt_offset,
+				     (void *)(ddr_start + ivt_offset),
+				     4, 0x8, 0);
+
+			puts("Dumping CSF Header\n");
+			print_buffer(ddr_start + ivt_offset+IVT_SIZE,
+				     (void *)(ddr_start + ivt_offset+IVT_SIZE),
+				     4, 0x10, 0);
+
+			get_hab_status();
+
+			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
+			/*
+			 * 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 (get_cr() & CR_M) {
+				if (is_cpu_type(MXC_CPU_MX6Q) ||
+				    is_cpu_type(MXC_CPU_MX6D)) {
+					/*
+					 * 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_cpu_type(MXC_CPU_MX6DL) ||
+					   is_cpu_type(MXC_CPU_MX6SOLO)) {
+					writel(1, MX6DLS_PU_IROM_MMU_EN_VAR);
+				} else if (is_cpu_type(MXC_CPU_MX6SL)) {
+					writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
+				}
+			}
+
+			load_addr = (uint32_t)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;
+			}
+		} else {
+			puts("hab entry function fail\n");
+		}
+
+		hab_caam_clock_enable(0);
+
+		get_hab_status();
+	} else {
+		puts("hab fuse not enabled\n");
+	}
+
+	if ((!is_hab_enabled()) || (load_addr != 0))
+		result = 1;
+
+	return result;
+}
+
+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;
+}
+
+static int do_authenticate_image(cmd_tbl_t *cmdtp, int flag, int argc,
+				char * const argv[])
+{
+	ulong	addr, ivt_offset;
+	int	rcode = 0;
+
+	if (argc < 3)
+		return CMD_RET_USAGE;
+
+	addr = simple_strtoul(argv[1], NULL, 16);
+	ivt_offset = simple_strtoul(argv[2], NULL, 16);
+
+	rcode = authenticate_image(addr, ivt_offset);
+
+	return rcode;
+}
+
+U_BOOT_CMD(
+		hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
+		"display HAB status",
+		""
+	  );
+
+U_BOOT_CMD(
+		hab_auth_img, 3, 0, do_authenticate_image,
+		"authenticate image via HAB",
+		"addr ivt_offset\n"
+		"addr - image hex address\n"
+		"ivt_offset - hex offset of IVT in the image"
+	  );