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-rw-r--r--drivers/misc/Kconfig8
-rw-r--r--drivers/misc/Makefile1
-rw-r--r--drivers/misc/fsl_sec_mon.c146
-rw-r--r--include/fsl_sec_mon.h58
4 files changed, 213 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 0df25c331f..36a8f0d098 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -53,3 +53,11 @@ config DM_CROS_EC
but otherwise makes few changes. Since cros_ec also supports
LPC (which doesn't support driver model yet), a full
conversion is not yet possible.
+
+config CONFIG_FSL_SEC_MON
+ bool "Enable FSL SEC_MON Driver"
+ help
+ Freescale Security Monitor block is responsible for monitoring
+ system states.
+ Security Monitor can be transitioned on any security failures,
+ like software violations or hardware security violations.
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index a34972df4e..6028cd43fb 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -28,3 +28,4 @@ obj-$(CONFIG_SMSC_LPC47M) += smsc_lpc47m.o
obj-$(CONFIG_STATUS_LED) += status_led.o
obj-$(CONFIG_TWL4030_LED) += twl4030_led.o
obj-$(CONFIG_FSL_IFC) += fsl_ifc.o
+obj-$(CONFIG_FSL_SEC_MON) += fsl_sec_mon.o
diff --git a/drivers/misc/fsl_sec_mon.c b/drivers/misc/fsl_sec_mon.c
new file mode 100644
index 0000000000..d482a7db9c
--- /dev/null
+++ b/drivers/misc/fsl_sec_mon.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fsl_sec_mon.h>
+
+int change_sec_mon_state(u32 initial_state, u32 final_state)
+{
+ struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
+ (CONFIG_SYS_SEC_MON_ADDR);
+ u32 sts = sec_mon_in32(&sec_mon_regs->hp_stat);
+ int timeout = 10;
+
+ if ((sts & HPSR_SSM_ST_MASK) != initial_state)
+ return -1;
+
+ if (initial_state == HPSR_SSM_ST_TRUST) {
+ switch (final_state) {
+ case HPSR_SSM_ST_NON_SECURE:
+ printf("SEC_MON state transitioning to Soft Fail.\n");
+ sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_SV);
+
+ /*
+ * poll till SEC_MON is in
+ * Soft Fail state
+ */
+ while (((sts & HPSR_SSM_ST_MASK) !=
+ HPSR_SSM_ST_SOFT_FAIL)) {
+ while (timeout) {
+ sts = sec_mon_in32
+ (&sec_mon_regs->hp_stat);
+
+ if ((sts & HPSR_SSM_ST_MASK) ==
+ HPSR_SSM_ST_SOFT_FAIL)
+ break;
+
+ udelay(10);
+ timeout--;
+ }
+ }
+
+ if (timeout == 0) {
+ printf("SEC_MON state transition timeout.\n");
+ return -1;
+ }
+
+ timeout = 10;
+
+ printf("SEC_MON state transitioning to Non Secure.\n");
+ sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SSM_ST);
+
+ /*
+ * poll till SEC_MON is in
+ * Non Secure state
+ */
+ while (((sts & HPSR_SSM_ST_MASK) !=
+ HPSR_SSM_ST_NON_SECURE)) {
+ while (timeout) {
+ sts = sec_mon_in32
+ (&sec_mon_regs->hp_stat);
+
+ if ((sts & HPSR_SSM_ST_MASK) ==
+ HPSR_SSM_ST_NON_SECURE)
+ break;
+
+ udelay(10);
+ timeout--;
+ }
+ }
+
+ if (timeout == 0) {
+ printf("SEC_MON state transition timeout.\n");
+ return -1;
+ }
+ break;
+ case HPSR_SSM_ST_SOFT_FAIL:
+ printf("SEC_MON state transitioning to Soft Fail.\n");
+ sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_FSV);
+
+ /*
+ * polling loop till SEC_MON is in
+ * Soft Fail state
+ */
+ while (((sts & HPSR_SSM_ST_MASK) !=
+ HPSR_SSM_ST_SOFT_FAIL)) {
+ while (timeout) {
+ sts = sec_mon_in32
+ (&sec_mon_regs->hp_stat);
+
+ if ((sts & HPSR_SSM_ST_MASK) ==
+ HPSR_SSM_ST_SOFT_FAIL)
+ break;
+
+ udelay(10);
+ timeout--;
+ }
+ }
+
+ if (timeout == 0) {
+ printf("SEC_MON state transition timeout.\n");
+ return -1;
+ }
+ break;
+ default:
+ return -1;
+ }
+ } else if (initial_state == HPSR_SSM_ST_NON_SECURE) {
+ switch (final_state) {
+ case HPSR_SSM_ST_SOFT_FAIL:
+ printf("SEC_MON state transitioning to Soft Fail.\n");
+ sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_FSV);
+
+ /*
+ * polling loop till SEC_MON is in
+ * Soft Fail state
+ */
+ while (((sts & HPSR_SSM_ST_MASK) !=
+ HPSR_SSM_ST_SOFT_FAIL)) {
+ while (timeout) {
+ sts = sec_mon_in32
+ (&sec_mon_regs->hp_stat);
+
+ if ((sts & HPSR_SSM_ST_MASK) ==
+ HPSR_SSM_ST_SOFT_FAIL)
+ break;
+
+ udelay(10);
+ timeout--;
+ }
+ }
+
+ if (timeout == 0) {
+ printf("SEC_MON state transition timeout.\n");
+ return -1;
+ }
+ break;
+ default:
+ return -1;
+ }
+ }
+
+ return 0;
+}
diff --git a/include/fsl_sec_mon.h b/include/fsl_sec_mon.h
new file mode 100644
index 0000000000..b6794cefcc
--- /dev/null
+++ b/include/fsl_sec_mon.h
@@ -0,0 +1,58 @@
+/*
+ * Common internal memory map for some Freescale SoCs
+ *
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __FSL_SEC_MON_H
+#define __FSL_SEC_MON_H
+
+#include <common.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_SYS_FSL_SEC_MON_LE
+#define sec_mon_in32(a) in_le32(a)
+#define sec_mon_out32(a, v) out_le32(a, v)
+#define sec_mon_in16(a) in_le16(a)
+#define sec_mon_clrbits32 clrbits_le32
+#define sec_mon_setbits32 setbits_le32
+#elif defined(CONFIG_SYS_FSL_SEC_MON_BE)
+#define sec_mon_in32(a) in_be32(a)
+#define sec_mon_out32(a, v) out_be32(a, v)
+#define sec_mon_in16(a) in_be16(a)
+#define sec_mon_clrbits32 clrbits_be32
+#define sec_mon_setbits32 setbits_be32
+#else
+#error Neither CONFIG_SYS_FSL_SEC_MON_LE nor CONFIG_SYS_FSL_SEC_MON_BE defined
+#endif
+
+struct ccsr_sec_mon_regs {
+ u8 reserved0[0x04];
+ u32 hp_com; /* 0x04 SEC_MON_HP Command Register */
+ u8 reserved2[0x0c];
+ u32 hp_stat; /* 0x08 SEC_MON_HP Status Register */
+};
+
+#define HPCOMR_SW_SV 0x100 /* Security Violation bit */
+#define HPCOMR_SW_FSV 0x200 /* Fatal Security Violation bit */
+#define HPCOMR_SSM_ST 0x1 /* SSM_ST field in SEC_MON command */
+#define HPSR_SSM_ST_CHECK 0x900 /* SEC_MON is in check state */
+#define HPSR_SSM_ST_NON_SECURE 0xb00 /* SEC_MON is in non secure state */
+#define HPSR_SSM_ST_TRUST 0xd00 /* SEC_MON is in trusted state */
+#define HPSR_SSM_ST_SOFT_FAIL 0x300 /* SEC_MON is in soft fail state */
+#define HPSR_SSM_ST_MASK 0xf00 /* Mask for SSM_ST field */
+
+/*
+ * SEC_MON read. This specifies the possible reads
+ * from the SEC_MON
+ */
+enum {
+ SEC_MON_SSM_ST,
+ SEC_MON_SW_FSV,
+ SEC_MON_SW_SV,
+};
+
+int change_sec_mon_state(uint32_t initial_state, uint32_t final_state);
+
+#endif /* __FSL_SEC_MON_H */
generated by cgit (git 2.34.1) at 2024-12-25 07:26:47 +0000