1 files changed, 164 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/misc/fsl_sec_mon.c b/roms/u-boot/drivers/misc/fsl_sec_mon.c
new file mode 100644
index 000000000..321bd27fd
--- /dev/null
+++ b/roms/u-boot/drivers/misc/fsl_sec_mon.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ */
+
+#include <common.h>
+#include <fsl_sec_mon.h>
+#include <linux/delay.h>
+
+static u32 get_sec_mon_state(void)
+{
+	struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
+						(CONFIG_SYS_SEC_MON_ADDR);
+	return sec_mon_in32(&sec_mon_regs->hp_stat) & HPSR_SSM_ST_MASK;
+}
+
+static int set_sec_mon_state_non_sec(void)
+{
+	u32 sts;
+	int timeout = 10;
+	struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
+						(CONFIG_SYS_SEC_MON_ADDR);
+
+	sts = get_sec_mon_state();
+
+	switch (sts) {
+	/*
+	 * If initial state is check or Non-Secure, then set the Software
+	 * Security Violation Bit and transition to Non-Secure State.
+	 */
+	case HPSR_SSM_ST_CHECK:
+		printf("SEC_MON state transitioning to Non Secure.\n");
+		sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_SV);
+
+		/* polling loop till SEC_MON is in Non Secure state */
+		while (timeout) {
+			sts = get_sec_mon_state();
+
+			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;
+
+	/*
+	 * If initial state is Trusted, Secure or Soft-Fail, then first set
+	 * the Software Security Violation Bit and transition to Soft-Fail
+	 * State.
+	 */
+	case HPSR_SSM_ST_TRUST:
+	case HPSR_SSM_ST_SECURE:
+	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_SV);
+
+		/* polling loop till SEC_MON is in Soft-Fail state */
+		while (timeout) {
+			sts = get_sec_mon_state();
+
+			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;
+
+		/*
+		 * If SSM Soft Fail to Non-Secure State Transition
+		 * disable is not set, then set SSM_ST bit and
+		 * transition to Non-Secure State.
+		 */
+		if ((sec_mon_in32(&sec_mon_regs->hp_com) &
+			HPCOMR_SSM_SFNS_DIS) == 0) {
+			printf("SEC_MON state transitioning to Non Secure.\n");
+			sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SSM_ST);
+
+			/* polling loop till SEC_MON is in Non Secure*/
+			while (timeout) {
+				sts = get_sec_mon_state();
+
+				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;
+	default:
+		printf("SEC_MON already in Non Secure state.\n");
+		return 0;
+	}
+	return 0;
+}
+
+static int set_sec_mon_state_soft_fail(void)
+{
+	u32 sts;
+	int timeout = 10;
+	struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
+						(CONFIG_SYS_SEC_MON_ADDR);
+
+	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 (timeout) {
+		sts = get_sec_mon_state();
+
+		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;
+	}
+	return 0;
+}
+
+int set_sec_mon_state(u32 state)
+{
+	int ret = -1;
+
+	switch (state) {
+	case HPSR_SSM_ST_NON_SECURE:
+		ret = set_sec_mon_state_non_sec();
+		break;
+	case HPSR_SSM_ST_SOFT_FAIL:
+		ret = set_sec_mon_state_soft_fail();
+		break;
+	default:
+		printf("SEC_MON state transition not supported.\n");
+		return 0;
+	}
+
+	return ret;
+}