[U-Boot] [PATCH v1 7/7] imx: add status reporting for HAB status
Stefano Babic
sbabic at denx.de
Thu Jul 11 15:06:41 CEST 2013
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 <sbabic at denx.de>
---
arch/arm/cpu/armv7/mx6/Makefile | 2 +-
arch/arm/cpu/armv7/mx6/hab.c | 127 ++++++++++++++++++++++++++++++
arch/arm/include/asm/arch-mx6/hab.h | 80 +++++++++++++++++++
arch/arm/include/asm/arch-mx6/imx-regs.h | 8 +-
4 files changed, 215 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/cpu/armv7/mx6/hab.c
create mode 100644 arch/arm/include/asm/arch-mx6/hab.h
diff --git a/arch/arm/cpu/armv7/mx6/Makefile b/arch/arm/cpu/armv7/mx6/Makefile
index 4f9ca68..7c18f43 100644
--- a/arch/arm/cpu/armv7/mx6/Makefile
+++ b/arch/arm/cpu/armv7/mx6/Makefile
@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o
-COBJS = soc.o clock.o
+COBJS = soc.o clock.o hab.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/arch/arm/cpu/armv7/mx6/hab.c b/arch/arm/cpu/armv7/mx6/hab.c
new file mode 100644
index 0000000..c3c273f
--- /dev/null
+++ b/arch/arm/cpu/armv7/mx6/hab.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2010-2013 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#if defined(CONFIG_SECURE_BOOT)
+#include <asm/arch/hab.h>
+
+#ifdef CONFIG_SECURE_BOOT
+/* -------- 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)) {
+ 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 */
+ hab_config_t config = 0;
+ hab_state_t state = 0;
+
+ if (is_hab_enabled())
+ printf("\nSecure boot enabled\n");
+ else
+ printf("\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) {
+ printf("\n");
+ printf("--------- HAB Event %d -----------------\n",
+ index + 1);
+ printf("event data:\n");
+ display_event(event_data, bytes);
+ printf("\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);
+ printf("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",
+ ""
+);
+
+#endif
+
+#endif
diff --git a/arch/arm/include/asm/arch-mx6/hab.h b/arch/arm/include/asm/arch-mx6/hab.h
new file mode 100644
index 0000000..927c280
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx6/hab.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Auto Generate file, please don't edit it
+ *
+ */
+
+#ifndef __SECURE_MX6Q_H__
+#define __SECURE_MX6Q_H__
+
+#include <linux/types.h>
+
+/* -------- start of HAB API updates ------------*/
+/* The following are taken from HAB4 SIS */
+
+/* Status definitions */
+enum hab_status {
+ HAB_STS_ANY = 0x00,
+ HAB_FAILURE = 0x33,
+ HAB_WARNING = 0x69,
+ HAB_SUCCESS = 0xf0
+} hab_status_t;
+
+/* Security Configuration definitions */
+enum hab_config {
+ HAB_CFG_RETURN = 0x33, /**< Field Return IC */
+ HAB_CFG_OPEN = 0xf0, /**< Non-secure IC */
+ HAB_CFG_CLOSED = 0xcc /**< Secure IC */
+} hab_config_t;
+
+/* State definitions */
+enum hab_state {
+ HAB_STATE_INITIAL = 0x33, /**< Initialising state (transitory) */
+ HAB_STATE_CHECK = 0x55, /**< Check state (non-secure) */
+ HAB_STATE_NONSECURE = 0x66, /**< Non-secure state */
+ HAB_STATE_TRUSTED = 0x99, /**< Trusted state */
+ HAB_STATE_SECURE = 0xaa, /**< Secure state */
+ HAB_STATE_FAIL_SOFT = 0xcc, /**< Soft fail state */
+ HAB_STATE_FAIL_HARD = 0xff, /**< Hard fail state (terminal) */
+ HAB_STATE_NONE = 0xf0, /**< No security state machine */
+ HAB_STATE_MAX
+} hab_state_t;
+
+/*Function prototype description*/
+typedef hab_status_t hab_rvt_report_event_t(hab_status_t, uint32_t,
+ uint8_t* , size_t*);
+typedef hab_status_t hab_rvt_report_status_t(hab_config_t *, hab_state_t *);
+typedef hab_status_t hab_loader_callback_f_t(void**, size_t*, const void*);
+typedef hab_status_t hab_rvt_entry_t(void);
+typedef hab_status_t hab_rvt_exit_t(void);
+typedef void *hab_rvt_authenticate_image_t(uint8_t, ptrdiff_t,
+ void **, size_t *, hab_loader_callback_f_t);
+typedef void hapi_clock_init_t(void);
+
+#define HAB_RVT_REPORT_EVENT (*(uint32_t *)0x000000B4)
+#define HAB_RVT_REPORT_STATUS (*(uint32_t *)0x000000B8)
+#define HAB_RVT_AUTHENTICATE_IMAGE (*(uint32_t *)0x000000A4)
+#define HAB_RVT_ENTRY (*(uint32_t *)0x00000098)
+#define HAB_RVT_EXIT (*(uint32_t *)0x0000009C)
+#define HAB_RVT_CLOCK_INIT ((hapi_clock_init_t *)0x0000024D)
+
+#define HAB_CID_ROM 0 /**< ROM Caller ID */
+#define HAB_CID_UBOOT 1 /**< UBOOT Caller ID*/
+/* ----------- end of HAB API updates ------------*/
+
+#endif
diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h
index 03abb2a..4a2bba9 100644
--- a/arch/arm/include/asm/arch-mx6/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx6/imx-regs.h
@@ -468,7 +468,13 @@ struct fuse_bank0_regs {
u32 uid_low;
u32 rsvd1[3];
u32 uid_high;
- u32 rsvd2[0x17];
+ u32 rsvd2[3];
+ u32 rsvd3[4];
+ u32 rsvd4[4];
+ u32 rsvd5[4];
+ u32 cfg5;
+ u32 rsvd6[3];
+ u32 rsvd7[4];
};
struct fuse_bank4_regs {
--
1.7.9.5
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