Merge "IO Driver Misra Cleanup" into integration
diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c
index 2f4dcad..d6cd8b1 100644
--- a/drivers/st/clk/stm32mp1_clk.c
+++ b/drivers/st/clk/stm32mp1_clk.c
@@ -577,6 +577,43 @@
 	1, 2, 3, 4, 4, 4, 4, 4
 };
 
+static const char * const stm32mp1_clk_parent_name[_PARENT_NB] __unused = {
+	[_HSI] = "HSI",
+	[_HSE] = "HSE",
+	[_CSI] = "CSI",
+	[_LSI] = "LSI",
+	[_LSE] = "LSE",
+	[_I2S_CKIN] = "I2S_CKIN",
+	[_HSI_KER] = "HSI_KER",
+	[_HSE_KER] = "HSE_KER",
+	[_HSE_KER_DIV2] = "HSE_KER_DIV2",
+	[_CSI_KER] = "CSI_KER",
+	[_PLL1_P] = "PLL1_P",
+	[_PLL1_Q] = "PLL1_Q",
+	[_PLL1_R] = "PLL1_R",
+	[_PLL2_P] = "PLL2_P",
+	[_PLL2_Q] = "PLL2_Q",
+	[_PLL2_R] = "PLL2_R",
+	[_PLL3_P] = "PLL3_P",
+	[_PLL3_Q] = "PLL3_Q",
+	[_PLL3_R] = "PLL3_R",
+	[_PLL4_P] = "PLL4_P",
+	[_PLL4_Q] = "PLL4_Q",
+	[_PLL4_R] = "PLL4_R",
+	[_ACLK] = "ACLK",
+	[_PCLK1] = "PCLK1",
+	[_PCLK2] = "PCLK2",
+	[_PCLK3] = "PCLK3",
+	[_PCLK4] = "PCLK4",
+	[_PCLK5] = "PCLK5",
+	[_HCLK6] = "KCLK6",
+	[_HCLK2] = "HCLK2",
+	[_CK_PER] = "CK_PER",
+	[_CK_MPU] = "CK_MPU",
+	[_CK_MCU] = "CK_MCU",
+	[_USB_PHY_48] = "USB_PHY_48",
+};
+
 /* RCC clock device driver private */
 static unsigned long stm32mp1_osc[NB_OSC];
 static struct spinlock reg_lock;
@@ -2007,6 +2044,165 @@
 	}
 }
 
+#ifdef STM32MP_SHARED_RESOURCES
+/*
+ * Get the parent ID of the target parent clock, for tagging as secure
+ * shared clock dependencies.
+ */
+static int get_parent_id_parent(unsigned int parent_id)
+{
+	enum stm32mp1_parent_sel s = _UNKNOWN_SEL;
+	enum stm32mp1_pll_id pll_id;
+	uint32_t p_sel;
+	uintptr_t rcc_base = stm32mp_rcc_base();
+
+	switch (parent_id) {
+	case _ACLK:
+	case _PCLK4:
+	case _PCLK5:
+		s = _AXIS_SEL;
+		break;
+	case _PLL1_P:
+	case _PLL1_Q:
+	case _PLL1_R:
+		pll_id = _PLL1;
+		break;
+	case _PLL2_P:
+	case _PLL2_Q:
+	case _PLL2_R:
+		pll_id = _PLL2;
+		break;
+	case _PLL3_P:
+	case _PLL3_Q:
+	case _PLL3_R:
+		pll_id = _PLL3;
+		break;
+	case _PLL4_P:
+	case _PLL4_Q:
+	case _PLL4_R:
+		pll_id = _PLL4;
+		break;
+	case _PCLK1:
+	case _PCLK2:
+	case _HCLK2:
+	case _HCLK6:
+	case _CK_PER:
+	case _CK_MPU:
+	case _CK_MCU:
+	case _USB_PHY_48:
+		/* We do not expect to access these */
+		panic();
+		break;
+	default:
+		/* Other parents have no parent */
+		return -1;
+	}
+
+	if (s != _UNKNOWN_SEL) {
+		const struct stm32mp1_clk_sel *sel = clk_sel_ref(s);
+
+		p_sel = (mmio_read_32(rcc_base + sel->offset) >> sel->src) &
+			sel->msk;
+
+		if (p_sel < sel->nb_parent) {
+			return (int)sel->parent[p_sel];
+		}
+	} else {
+		const struct stm32mp1_clk_pll *pll = pll_ref(pll_id);
+
+		p_sel = mmio_read_32(rcc_base + pll->rckxselr) &
+			RCC_SELR_REFCLK_SRC_MASK;
+
+		if (pll->refclk[p_sel] != _UNKNOWN_OSC_ID) {
+			return (int)pll->refclk[p_sel];
+		}
+	}
+
+	VERBOSE("No parent selected for %s\n",
+		stm32mp1_clk_parent_name[parent_id]);
+
+	return -1;
+}
+
+static void secure_parent_clocks(unsigned long parent_id)
+{
+	int grandparent_id;
+
+	switch (parent_id) {
+	case _PLL3_P:
+	case _PLL3_Q:
+	case _PLL3_R:
+		stm32mp_register_secure_periph(STM32MP1_SHRES_PLL3);
+		break;
+
+	/* These clocks are always secure when RCC is secure */
+	case _ACLK:
+	case _HCLK2:
+	case _HCLK6:
+	case _PCLK4:
+	case _PCLK5:
+	case _PLL1_P:
+	case _PLL1_Q:
+	case _PLL1_R:
+	case _PLL2_P:
+	case _PLL2_Q:
+	case _PLL2_R:
+	case _HSI:
+	case _HSI_KER:
+	case _LSI:
+	case _CSI:
+	case _CSI_KER:
+	case _HSE:
+	case _HSE_KER:
+	case _HSE_KER_DIV2:
+	case _LSE:
+		break;
+
+	default:
+		VERBOSE("Cannot secure parent clock %s\n",
+			stm32mp1_clk_parent_name[parent_id]);
+		panic();
+	}
+
+	grandparent_id = get_parent_id_parent(parent_id);
+	if (grandparent_id >= 0) {
+		secure_parent_clocks(grandparent_id);
+	}
+}
+
+void stm32mp1_register_clock_parents_secure(unsigned long clock_id)
+{
+	int parent_id;
+
+	if (!stm32mp1_rcc_is_secure()) {
+		return;
+	}
+
+	switch (clock_id) {
+	case PLL1:
+	case PLL2:
+		/* PLL1/PLL2 are always secure: nothing to do */
+		break;
+	case PLL3:
+		stm32mp_register_secure_periph(STM32MP1_SHRES_PLL3);
+		break;
+	case PLL4:
+		ERROR("PLL4 cannot be secured\n");
+		panic();
+		break;
+	default:
+		/* Others are expected gateable clock */
+		parent_id = stm32mp1_clk_get_parent(clock_id);
+		if (parent_id < 0) {
+			INFO("No parent found for clock %lu\n", clock_id);
+		} else {
+			secure_parent_clocks(parent_id);
+		}
+		break;
+	}
+}
+#endif /* STM32MP_SHARED_RESOURCES */
+
 static void sync_earlyboot_clocks_state(void)
 {
 	unsigned int idx;
diff --git a/drivers/st/crypto/stm32_hash.c b/drivers/st/crypto/stm32_hash.c
index 3184df9..515947c 100644
--- a/drivers/st/crypto/stm32_hash.c
+++ b/drivers/st/crypto/stm32_hash.c
@@ -300,7 +300,9 @@
 			break;
 		}
 #else
+		/* BL32 uses hash if it is assigned only to secure world */
 		if (hash_info.status == DT_SECURE) {
+			stm32mp_register_secure_periph_iomem(hash_info.base);
 			break;
 		}
 #endif
diff --git a/drivers/st/gpio/stm32_gpio.c b/drivers/st/gpio/stm32_gpio.c
index a13c341..bb77371 100644
--- a/drivers/st/gpio/stm32_gpio.c
+++ b/drivers/st/gpio/stm32_gpio.c
@@ -254,6 +254,15 @@
 		mmio_read_32(base + GPIO_AFRH_OFFSET));
 
 	stm32mp_clk_disable(clock);
+
+	if (status == DT_SECURE) {
+		stm32mp_register_secure_gpio(bank, pin);
+		set_gpio_secure_cfg(bank, pin, true);
+
+	} else {
+		stm32mp_register_non_secure_gpio(bank, pin);
+		set_gpio_secure_cfg(bank, pin, false);
+	}
 }
 
 void set_gpio_secure_cfg(uint32_t bank, uint32_t pin, bool secure)
diff --git a/drivers/st/iwdg/stm32_iwdg.c b/drivers/st/iwdg/stm32_iwdg.c
index ea6fbb2..c052b4d 100644
--- a/drivers/st/iwdg/stm32_iwdg.c
+++ b/drivers/st/iwdg/stm32_iwdg.c
@@ -137,6 +137,12 @@
 			((dt_info.status & DT_NON_SECURE) != 0) ?
 			"non-" : "");
 
+		if ((dt_info.status & DT_NON_SECURE) != 0) {
+			stm32mp_register_non_secure_periph_iomem(iwdg->base);
+		} else {
+			stm32mp_register_secure_periph_iomem(iwdg->base);
+		}
+
 #if defined(IMAGE_BL2)
 		if (stm32_iwdg_shadow_update(idx, iwdg->flags) != BSEC_OK) {
 			return -1;
diff --git a/drivers/st/pmic/stm32mp_pmic.c b/drivers/st/pmic/stm32mp_pmic.c
index 9e9dddc..b2bb482 100644
--- a/drivers/st/pmic/stm32mp_pmic.c
+++ b/drivers/st/pmic/stm32mp_pmic.c
@@ -54,6 +54,15 @@
 	return fdt_get_status(node);
 }
 
+static bool dt_pmic_is_secure(void)
+{
+	int status = dt_pmic_status();
+
+	return (status >= 0) &&
+	       (status == DT_SECURE) &&
+	       (i2c_handle.dt_status == DT_SECURE);
+}
+
 /*
  * Get PMIC and its I2C bus configuration from the device tree.
  * Return 0 on success, negative on error, 1 if no PMIC node is found.
@@ -223,6 +232,19 @@
 	return true;
 }
 
+static void register_pmic_shared_peripherals(void)
+{
+	uintptr_t i2c_base = i2c_handle.i2c_base_addr;
+
+	if (dt_pmic_is_secure()) {
+		stm32mp_register_secure_periph_iomem(i2c_base);
+	} else {
+		if (i2c_base != 0U) {
+			stm32mp_register_non_secure_periph_iomem(i2c_base);
+		}
+	}
+}
+
 void initialize_pmic(void)
 {
 	unsigned long pmic_version;
@@ -232,6 +254,8 @@
 		return;
 	}
 
+	register_pmic_shared_peripherals();
+
 	if (stpmic1_get_version(&pmic_version) != 0) {
 		ERROR("Failed to access PMIC\n");
 		panic();
diff --git a/include/drivers/st/stm32mp1_clk.h b/include/drivers/st/stm32mp1_clk.h
index 1ebd39f..c46892b 100644
--- a/include/drivers/st/stm32mp1_clk.h
+++ b/include/drivers/st/stm32mp1_clk.h
@@ -59,4 +59,7 @@
 
 void stm32mp1_stgen_increment(unsigned long long offset_in_ms);
 
+#ifdef STM32MP_SHARED_RESOURCES
+void stm32mp1_register_clock_parents_secure(unsigned long id);
+#endif
 #endif /* STM32MP1_CLK_H */
diff --git a/plat/arm/board/arm_fpga/fpga_def.h b/plat/arm/board/arm_fpga/fpga_def.h
index 0378729..5f1951f 100644
--- a/plat/arm/board/arm_fpga/fpga_def.h
+++ b/plat/arm/board/arm_fpga/fpga_def.h
@@ -18,7 +18,7 @@
  * that are present will still be indexed appropriately regardless of any empty
  * entries in the array used to represent the topology.
  */
-#define FPGA_MAX_CLUSTER_COUNT			2
+#define FPGA_MAX_CLUSTER_COUNT			4
 #define FPGA_MAX_CPUS_PER_CLUSTER		8
 #define FPGA_MAX_PE_PER_CPU			4
 
diff --git a/plat/arm/board/arm_fpga/platform.mk b/plat/arm/board/arm_fpga/platform.mk
index 34e50ea..e57912c 100644
--- a/plat/arm/board/arm_fpga/platform.mk
+++ b/plat/arm/board/arm_fpga/platform.mk
@@ -24,15 +24,10 @@
 $(error "TRUSTED_BOARD_BOOT must be disabled")
 endif
 
-ifndef PRELOADED_BL33_BASE
-$(error "PRELOADED_BL33_BASE is not set")
-endif
+PRELOADED_BL33_BASE := 0x80080000
 
-ifndef FPGA_PRELOADED_DTB_BASE
-$(error "FPGA_PRELOADED_DTB_BASE is not set")
-else
+FPGA_PRELOADED_DTB_BASE := 0x80070000
 $(eval $(call add_define,FPGA_PRELOADED_DTB_BASE))
-endif
 
 # Treating this as a memory-constrained port for now
 USE_COHERENT_MEM	:=	0
@@ -64,7 +59,10 @@
 				lib/cpus/aarch64/neoverse_zeus.S	\
 				lib/cpus/aarch64/cortex_hercules_ae.S	\
 				lib/cpus/aarch64/cortex_a65.S		\
-				lib/cpus/aarch64/cortex_a65ae.S
+				lib/cpus/aarch64/cortex_a65ae.S		\
+				lib/cpus/aarch64/cortex_klein.S		\
+				lib/cpus/aarch64/cortex_matterhorn.S
+
 # AArch64/AArch32 cores
 	FPGA_CPU_LIBS	+=	lib/cpus/aarch64/cortex_a55.S	\
 				lib/cpus/aarch64/cortex_a75.S
diff --git a/plat/st/common/include/stm32mp_shared_resources.h b/plat/st/common/include/stm32mp_shared_resources.h
index b148666..13f4b13 100644
--- a/plat/st/common/include/stm32mp_shared_resources.h
+++ b/plat/st/common/include/stm32mp_shared_resources.h
@@ -8,6 +8,10 @@
 #define STM32MP_SHARED_RESOURCES_H
 
 #include <stdbool.h>
+#include <stdint.h>
+
+#ifdef STM32MP_SHARED_RESOURCES
+enum stm32mp_shres;
 
 /* Return true if @clock_id is shared by secure and non-secure worlds */
 bool stm32mp_nsec_can_access_clock(unsigned long clock_id);
@@ -15,7 +19,40 @@
 /* Return true if and only if @reset_id relates to a non-secure peripheral */
 bool stm32mp_nsec_can_access_reset(unsigned int reset_id);
 
+/* Register a shared resource assigned to the secure world */
+void stm32mp_register_secure_periph(enum stm32mp_shres id);
+
+/* Register a shared resource assigned to the non-secure world */
+void stm32mp_register_non_secure_periph(enum stm32mp_shres id);
+
+/* Register a peripheral as secure or non-secure based on IO base address */
+void stm32mp_register_secure_periph_iomem(uintptr_t base);
+void stm32mp_register_non_secure_periph_iomem(uintptr_t base);
+
+/* Register a GPIO as secure or non-secure based on its bank and pin numbers */
+void stm32mp_register_secure_gpio(unsigned int bank, unsigned int pin);
+void stm32mp_register_non_secure_gpio(unsigned int bank, unsigned int pin);
+
 /* Consolidate peripheral states and lock against new peripheral registering */
 void stm32mp_lock_periph_registering(void);
+#else
+static inline void stm32mp_register_secure_periph_iomem(uintptr_t base __unused)
+{
+}
 
+static inline
+void stm32mp_register_non_secure_periph_iomem(uintptr_t base __unused)
+{
+}
+
+static inline void stm32mp_register_secure_gpio(unsigned int bank __unused,
+						unsigned int pin __unused)
+{
+}
+
+static inline void stm32mp_register_non_secure_gpio(unsigned int bank __unused,
+						    unsigned int pin __unused)
+{
+}
+#endif /* STM32MP_SHARED_RESOURCES */
 #endif /* STM32MP_SHARED_RESOURCES_H */
diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index ef82d5e..bce5994 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -494,14 +494,16 @@
 #define IWDG2_BASE			U(0x5A002000)
 
 /*******************************************************************************
- * STM32MP1 I2C4
+ * Miscellaneous STM32MP1 peripherals base address
  ******************************************************************************/
-#define I2C4_BASE			U(0x5C002000)
-
-/*******************************************************************************
- * STM32MP1 DBGMCU
- ******************************************************************************/
+#define CRYP1_BASE			U(0x54001000)
 #define DBGMCU_BASE			U(0x50081000)
+#define HASH1_BASE			U(0x54002000)
+#define I2C4_BASE			U(0x5C002000)
+#define I2C6_BASE			U(0x5c009000)
+#define RNG1_BASE			U(0x54003000)
+#define RTC_BASE			U(0x5c004000)
+#define SPI6_BASE			U(0x5c001000)
 
 /*******************************************************************************
  * Device Tree defines
diff --git a/plat/st/stm32mp1/stm32mp1_shared_resources.c b/plat/st/stm32mp1/stm32mp1_shared_resources.c
index 268aa52..208e34a 100644
--- a/plat/st/stm32mp1/stm32mp1_shared_resources.c
+++ b/plat/st/stm32mp1/stm32mp1_shared_resources.c
@@ -44,6 +44,49 @@
 /* Force uint8_t array for array of enum shres_state for size considerations */
 static uint8_t shres_state[STM32MP1_SHRES_COUNT];
 
+static const char *shres2str_id_tbl[STM32MP1_SHRES_COUNT] __unused = {
+	[STM32MP1_SHRES_GPIOZ(0)] = "GPIOZ0",
+	[STM32MP1_SHRES_GPIOZ(1)] = "GPIOZ1",
+	[STM32MP1_SHRES_GPIOZ(2)] = "GPIOZ2",
+	[STM32MP1_SHRES_GPIOZ(3)] = "GPIOZ3",
+	[STM32MP1_SHRES_GPIOZ(4)] = "GPIOZ4",
+	[STM32MP1_SHRES_GPIOZ(5)] = "GPIOZ5",
+	[STM32MP1_SHRES_GPIOZ(6)] = "GPIOZ6",
+	[STM32MP1_SHRES_GPIOZ(7)] = "GPIOZ7",
+	[STM32MP1_SHRES_IWDG1] = "IWDG1",
+	[STM32MP1_SHRES_USART1] = "USART1",
+	[STM32MP1_SHRES_SPI6] = "SPI6",
+	[STM32MP1_SHRES_I2C4] = "I2C4",
+	[STM32MP1_SHRES_RNG1] = "RNG1",
+	[STM32MP1_SHRES_HASH1] = "HASH1",
+	[STM32MP1_SHRES_CRYP1] = "CRYP1",
+	[STM32MP1_SHRES_I2C6] = "I2C6",
+	[STM32MP1_SHRES_RTC] = "RTC",
+	[STM32MP1_SHRES_MCU] = "MCU",
+	[STM32MP1_SHRES_MDMA] = "MDMA",
+	[STM32MP1_SHRES_PLL3] = "PLL3",
+};
+
+static const char __unused *shres2str_id(enum stm32mp_shres id)
+{
+	assert(id < ARRAY_SIZE(shres2str_id_tbl));
+
+	return shres2str_id_tbl[id];
+}
+
+static const char __unused *shres2str_state_tbl[] = {
+	[SHRES_UNREGISTERED] = "unregistered",
+	[SHRES_NON_SECURE] = "non-secure",
+	[SHRES_SECURE] = "secure",
+};
+
+static const char __unused *shres2str_state(unsigned int state)
+{
+	assert(state < ARRAY_SIZE(shres2str_state_tbl));
+
+	return shres2str_state_tbl[state];
+}
+
 /* Get resource state: these accesses lock the registering support */
 static void lock_registering(void)
 {
@@ -92,16 +135,344 @@
 	return get_gpio_nbpin(GPIO_BANK_Z);
 }
 
-/* Currently allow full access by non-secure to platform clock services */
-bool stm32mp_nsec_can_access_clock(unsigned long clock_id)
+static void register_periph(enum stm32mp_shres id, unsigned int state)
 {
-	return true;
+	assert((id < STM32MP1_SHRES_COUNT) &&
+	       ((state == SHRES_SECURE) || (state == SHRES_NON_SECURE)));
+
+	if (registering_locked) {
+		if (shres_state[id] == state) {
+			return;
+		}
+		panic();
+	}
+
+	if ((shres_state[id] != SHRES_UNREGISTERED) &&
+	    (shres_state[id] != state)) {
+		VERBOSE("Cannot change %s from %s to %s\n",
+			shres2str_id(id),
+			shres2str_state(shres_state[id]),
+			shres2str_state(state));
+		panic();
+	}
+
+	if (shres_state[id] == SHRES_UNREGISTERED) {
+		VERBOSE("Register %s as %s\n",
+			shres2str_id(id), shres2str_state(state));
+	}
+
+	if ((id >= STM32MP1_SHRES_GPIOZ(0)) &&
+	    (id <= STM32MP1_SHRES_GPIOZ(7)) &&
+	    ((id - STM32MP1_SHRES_GPIOZ(0)) >= get_gpioz_nbpin())) {
+		ERROR("Invalid GPIO pin %u, %u pin(s) available\n",
+		      id - STM32MP1_SHRES_GPIOZ(0), get_gpioz_nbpin());
+		panic();
+	}
+
+	shres_state[id] = (uint8_t)state;
+
+	/* Explore clock tree to lock dependencies */
+	if (state == SHRES_SECURE) {
+		enum stm32mp_shres clock_res_id;
+
+		switch (id) {
+		case STM32MP1_SHRES_GPIOZ(0):
+		case STM32MP1_SHRES_GPIOZ(1):
+		case STM32MP1_SHRES_GPIOZ(2):
+		case STM32MP1_SHRES_GPIOZ(3):
+		case STM32MP1_SHRES_GPIOZ(4):
+		case STM32MP1_SHRES_GPIOZ(5):
+		case STM32MP1_SHRES_GPIOZ(6):
+		case STM32MP1_SHRES_GPIOZ(7):
+			clock_res_id = GPIOZ;
+			break;
+		case STM32MP1_SHRES_IWDG1:
+			clock_res_id = IWDG1;
+			break;
+		case STM32MP1_SHRES_USART1:
+			clock_res_id = USART1_K;
+			break;
+		case STM32MP1_SHRES_SPI6:
+			clock_res_id = SPI6_K;
+			break;
+		case STM32MP1_SHRES_I2C4:
+			clock_res_id = I2C4_K;
+			break;
+		case STM32MP1_SHRES_RNG1:
+			clock_res_id = RNG1_K;
+			break;
+		case STM32MP1_SHRES_HASH1:
+			clock_res_id = HASH1;
+			break;
+		case STM32MP1_SHRES_CRYP1:
+			clock_res_id = CRYP1;
+			break;
+		case STM32MP1_SHRES_I2C6:
+			clock_res_id = I2C6_K;
+			break;
+		case STM32MP1_SHRES_RTC:
+			clock_res_id = RTC;
+			break;
+		default:
+			/* No clock resource dependency */
+			return;
+		}
+
+		stm32mp1_register_clock_parents_secure(clock_res_id);
+	}
 }
 
-/* Currently allow full access by non-secure to platform reset services */
+/* Register resource by ID */
+void stm32mp_register_secure_periph(enum stm32mp_shres id)
+{
+	register_periph(id, SHRES_SECURE);
+}
+
+void stm32mp_register_non_secure_periph(enum stm32mp_shres id)
+{
+	register_periph(id, SHRES_NON_SECURE);
+}
+
+static void register_periph_iomem(uintptr_t base, unsigned int state)
+{
+	enum stm32mp_shres id;
+
+	switch (base) {
+	case CRYP1_BASE:
+		id = STM32MP1_SHRES_CRYP1;
+		break;
+	case HASH1_BASE:
+		id = STM32MP1_SHRES_HASH1;
+		break;
+	case I2C4_BASE:
+		id = STM32MP1_SHRES_I2C4;
+		break;
+	case I2C6_BASE:
+		id = STM32MP1_SHRES_I2C6;
+		break;
+	case IWDG1_BASE:
+		id = STM32MP1_SHRES_IWDG1;
+		break;
+	case RNG1_BASE:
+		id = STM32MP1_SHRES_RNG1;
+		break;
+	case RTC_BASE:
+		id = STM32MP1_SHRES_RTC;
+		break;
+	case SPI6_BASE:
+		id = STM32MP1_SHRES_SPI6;
+		break;
+	case USART1_BASE:
+		id = STM32MP1_SHRES_USART1;
+		break;
+
+	case GPIOA_BASE:
+	case GPIOB_BASE:
+	case GPIOC_BASE:
+	case GPIOD_BASE:
+	case GPIOE_BASE:
+	case GPIOF_BASE:
+	case GPIOG_BASE:
+	case GPIOH_BASE:
+	case GPIOI_BASE:
+	case GPIOJ_BASE:
+	case GPIOK_BASE:
+	case USART2_BASE:
+	case USART3_BASE:
+	case UART4_BASE:
+	case UART5_BASE:
+	case USART6_BASE:
+	case UART7_BASE:
+	case UART8_BASE:
+	case IWDG2_BASE:
+		/* Allow drivers to register some non-secure resources */
+		VERBOSE("IO for non-secure resource 0x%x\n",
+			(unsigned int)base);
+		if (state != SHRES_NON_SECURE) {
+			panic();
+		}
+
+		return;
+
+	default:
+		panic();
+	}
+
+	register_periph(id, state);
+}
+
+void stm32mp_register_secure_periph_iomem(uintptr_t base)
+{
+	register_periph_iomem(base, SHRES_SECURE);
+}
+
+void stm32mp_register_non_secure_periph_iomem(uintptr_t base)
+{
+	register_periph_iomem(base, SHRES_NON_SECURE);
+}
+
+void stm32mp_register_secure_gpio(unsigned int bank, unsigned int pin)
+{
+	switch (bank) {
+	case GPIO_BANK_Z:
+		register_periph(STM32MP1_SHRES_GPIOZ(pin), SHRES_SECURE);
+		break;
+	default:
+		ERROR("GPIO bank %u cannot be secured\n", bank);
+		panic();
+	}
+}
+
+void stm32mp_register_non_secure_gpio(unsigned int bank, unsigned int pin)
+{
+	switch (bank) {
+	case GPIO_BANK_Z:
+		register_periph(STM32MP1_SHRES_GPIOZ(pin), SHRES_NON_SECURE);
+		break;
+	default:
+		break;
+	}
+}
+
+static bool stm32mp_gpio_bank_is_non_secure(unsigned int bank)
+{
+	unsigned int non_secure = 0U;
+	unsigned int i;
+
+	lock_registering();
+
+	if (bank != GPIO_BANK_Z) {
+		return true;
+	}
+
+	for (i = 0U; i < get_gpioz_nbpin(); i++) {
+		if (periph_is_non_secure(STM32MP1_SHRES_GPIOZ(i))) {
+			non_secure++;
+		}
+	}
+
+	return non_secure == get_gpioz_nbpin();
+}
+
+static bool stm32mp_gpio_bank_is_secure(unsigned int bank)
+{
+	unsigned int secure = 0U;
+	unsigned int i;
+
+	lock_registering();
+
+	if (bank != GPIO_BANK_Z) {
+		return false;
+	}
+
+	for (i = 0U; i < get_gpioz_nbpin(); i++) {
+		if (periph_is_secure(STM32MP1_SHRES_GPIOZ(i))) {
+			secure++;
+		}
+	}
+
+	return secure == get_gpioz_nbpin();
+}
+
+bool stm32mp_nsec_can_access_clock(unsigned long clock_id)
+{
+	enum stm32mp_shres shres_id = STM32MP1_SHRES_COUNT;
+
+	switch (clock_id) {
+	case CK_CSI:
+	case CK_HSE:
+	case CK_HSE_DIV2:
+	case CK_HSI:
+	case CK_LSE:
+	case CK_LSI:
+	case PLL1_P:
+	case PLL1_Q:
+	case PLL1_R:
+	case PLL2_P:
+	case PLL2_Q:
+	case PLL2_R:
+	case PLL3_P:
+	case PLL3_Q:
+	case PLL3_R:
+	case RTCAPB:
+		return true;
+	case GPIOZ:
+		/* Allow clock access if at least one pin is non-secure */
+		return !stm32mp_gpio_bank_is_secure(GPIO_BANK_Z);
+	case CRYP1:
+		shres_id = STM32MP1_SHRES_CRYP1;
+		break;
+	case HASH1:
+		shres_id = STM32MP1_SHRES_HASH1;
+		break;
+	case I2C4_K:
+		shres_id = STM32MP1_SHRES_I2C4;
+		break;
+	case I2C6_K:
+		shres_id = STM32MP1_SHRES_I2C6;
+		break;
+	case IWDG1:
+		shres_id = STM32MP1_SHRES_IWDG1;
+		break;
+	case RNG1_K:
+		shres_id = STM32MP1_SHRES_RNG1;
+		break;
+	case RTC:
+		shres_id = STM32MP1_SHRES_RTC;
+		break;
+	case SPI6_K:
+		shres_id = STM32MP1_SHRES_SPI6;
+		break;
+	case USART1_K:
+		shres_id = STM32MP1_SHRES_USART1;
+		break;
+	default:
+		return false;
+	}
+
+	return periph_is_non_secure(shres_id);
+}
+
 bool stm32mp_nsec_can_access_reset(unsigned int reset_id)
 {
-	return true;
+	enum stm32mp_shres shres_id = STM32MP1_SHRES_COUNT;
+
+	switch (reset_id) {
+	case CRYP1_R:
+		shres_id = STM32MP1_SHRES_CRYP1;
+		break;
+	case GPIOZ_R:
+		/* GPIOZ reset mandates all pins are non-secure */
+		return stm32mp_gpio_bank_is_non_secure(GPIO_BANK_Z);
+	case HASH1_R:
+		shres_id = STM32MP1_SHRES_HASH1;
+		break;
+	case I2C4_R:
+		shres_id = STM32MP1_SHRES_I2C4;
+		break;
+	case I2C6_R:
+		shres_id = STM32MP1_SHRES_I2C6;
+		break;
+	case MCU_R:
+		shres_id = STM32MP1_SHRES_MCU;
+		break;
+	case MDMA_R:
+		shres_id = STM32MP1_SHRES_MDMA;
+		break;
+	case RNG1_R:
+		shres_id = STM32MP1_SHRES_RNG1;
+		break;
+	case SPI6_R:
+		shres_id = STM32MP1_SHRES_SPI6;
+		break;
+	case USART1_R:
+		shres_id = STM32MP1_SHRES_USART1;
+		break;
+	default:
+		return false;
+	}
+
+	return periph_is_non_secure(shres_id);
 }
 
 static bool mckprot_protects_periph(enum stm32mp_shres id)
@@ -170,10 +541,10 @@
 		}
 
 		if (!secure || (mckprot_protects_periph(n) && (!mckprot))) {
-			ERROR("RCC %s MCKPROT %s and %u secure\n",
+			ERROR("RCC %s MCKPROT %s and %s secure\n",
 			      secure ? "secure" : "non-secure",
 			      mckprot ? "set" : "not set",
-			      n);
+			      shres2str_id(n));
 			error++;
 		}
 	}
@@ -201,14 +572,14 @@
 	for (id = 0U; id < STM32MP1_SHRES_COUNT; id++) {
 		switch (shres_state[id]) {
 		case SHRES_SECURE:
-			INFO("stm32mp1 %u is secure\n", id);
+			INFO("stm32mp1 %s is secure\n", shres2str_id(id));
 			break;
 		case SHRES_NON_SECURE:
 		case SHRES_UNREGISTERED:
-			VERBOSE("stm32mp %u is non-secure\n", id);
+			VERBOSE("stm32mp %s is non-secure\n", shres2str_id(id));
 			break;
 		default:
-			VERBOSE("stm32mp %u is invalid\n", id);
+			VERBOSE("stm32mp %s is invalid\n", shres2str_id(id));
 			panic();
 		}
 	}
diff --git a/tools/fiptool/fiptool.c b/tools/fiptool/fiptool.c
index 80b498e..8c5b04a 100644
--- a/tools/fiptool/fiptool.c
+++ b/tools/fiptool/fiptool.c
@@ -24,17 +24,17 @@
 #define OPT_ALIGN 2
 
 static int info_cmd(int argc, char *argv[]);
-static void info_usage(void);
+static void info_usage(int);
 static int create_cmd(int argc, char *argv[]);
-static void create_usage(void);
+static void create_usage(int);
 static int update_cmd(int argc, char *argv[]);
-static void update_usage(void);
+static void update_usage(int);
 static int unpack_cmd(int argc, char *argv[]);
-static void unpack_usage(void);
+static void unpack_usage(int);
 static int remove_cmd(int argc, char *argv[]);
-static void remove_usage(void);
+static void remove_usage(int);
 static int version_cmd(int argc, char *argv[]);
-static void version_usage(void);
+static void version_usage(int);
 static int help_cmd(int argc, char *argv[]);
 static void usage(void);
 
@@ -448,7 +448,7 @@
 	fip_toc_header_t toc_header;
 
 	if (argc != 2)
-		info_usage();
+		info_usage(EXIT_FAILURE);
 	argc--, argv++;
 
 	parse_fip(argv[0], &toc_header);
@@ -487,10 +487,10 @@
 	return 0;
 }
 
-static void info_usage(void)
+static void info_usage(int exit_status)
 {
 	printf("fiptool info FIP_FILENAME\n");
-	exit(1);
+	exit(exit_status);
 }
 
 static int pack_images(const char *filename, uint64_t toc_flags, unsigned long align)
@@ -669,7 +669,7 @@
 	unsigned long align = 1;
 
 	if (argc < 2)
-		create_usage();
+		create_usage(EXIT_FAILURE);
 
 	opts = fill_common_opts(opts, &nr_opts, required_argument);
 	opts = add_opt(opts, &nr_opts, "plat-toc-flags", required_argument,
@@ -710,7 +710,7 @@
 
 			if (memcmp(&uuid, &uuid_null, sizeof(uuid_t)) == 0 ||
 			    filename[0] == '\0')
-				create_usage();
+				create_usage(EXIT_FAILURE);
 
 			desc = lookup_image_desc_from_uuid(&uuid);
 			if (desc == NULL) {
@@ -722,7 +722,7 @@
 			break;
 		}
 		default:
-			create_usage();
+			create_usage(EXIT_FAILURE);
 		}
 	}
 	argc -= optind;
@@ -730,7 +730,7 @@
 	free(opts);
 
 	if (argc == 0)
-		create_usage();
+		create_usage(EXIT_SUCCESS);
 
 	update_fip();
 
@@ -738,7 +738,7 @@
 	return 0;
 }
 
-static void create_usage(void)
+static void create_usage(int exit_status)
 {
 	toc_entry_t *toc_entry = toc_entries;
 
@@ -753,7 +753,7 @@
 	for (; toc_entry->cmdline_name != NULL; toc_entry++)
 		printf("  --%-16s FILENAME\t%s\n", toc_entry->cmdline_name,
 		    toc_entry->name);
-	exit(1);
+	exit(exit_status);
 }
 
 static int update_cmd(int argc, char *argv[])
@@ -767,7 +767,7 @@
 	int pflag = 0;
 
 	if (argc < 2)
-		update_usage();
+		update_usage(EXIT_FAILURE);
 
 	opts = fill_common_opts(opts, &nr_opts, required_argument);
 	opts = add_opt(opts, &nr_opts, "align", required_argument, OPT_ALIGN);
@@ -807,7 +807,7 @@
 
 			if (memcmp(&uuid, &uuid_null, sizeof(uuid_t)) == 0 ||
 			    filename[0] == '\0')
-				update_usage();
+				update_usage(EXIT_FAILURE);
 
 			desc = lookup_image_desc_from_uuid(&uuid);
 			if (desc == NULL) {
@@ -825,7 +825,7 @@
 			snprintf(outfile, sizeof(outfile), "%s", optarg);
 			break;
 		default:
-			update_usage();
+			update_usage(EXIT_FAILURE);
 		}
 	}
 	argc -= optind;
@@ -833,7 +833,7 @@
 	free(opts);
 
 	if (argc == 0)
-		update_usage();
+		update_usage(EXIT_SUCCESS);
 
 	if (outfile[0] == '\0')
 		snprintf(outfile, sizeof(outfile), "%s", argv[0]);
@@ -851,7 +851,7 @@
 	return 0;
 }
 
-static void update_usage(void)
+static void update_usage(int exit_status)
 {
 	toc_entry_t *toc_entry = toc_entries;
 
@@ -867,7 +867,7 @@
 	for (; toc_entry->cmdline_name != NULL; toc_entry++)
 		printf("  --%-16s FILENAME\t%s\n", toc_entry->cmdline_name,
 		    toc_entry->name);
-	exit(1);
+	exit(exit_status);
 }
 
 static int unpack_cmd(int argc, char *argv[])
@@ -880,7 +880,7 @@
 	int unpack_all = 1;
 
 	if (argc < 2)
-		unpack_usage();
+		unpack_usage(EXIT_FAILURE);
 
 	opts = fill_common_opts(opts, &nr_opts, required_argument);
 	opts = add_opt(opts, &nr_opts, "blob", required_argument, 'b');
@@ -915,7 +915,7 @@
 
 			if (memcmp(&uuid, &uuid_null, sizeof(uuid_t)) == 0 ||
 			    filename[0] == '\0')
-				unpack_usage();
+				unpack_usage(EXIT_FAILURE);
 
 			desc = lookup_image_desc_from_uuid(&uuid);
 			if (desc == NULL) {
@@ -934,7 +934,7 @@
 			snprintf(outdir, sizeof(outdir), "%s", optarg);
 			break;
 		default:
-			unpack_usage();
+			unpack_usage(EXIT_FAILURE);
 		}
 	}
 	argc -= optind;
@@ -942,7 +942,7 @@
 	free(opts);
 
 	if (argc == 0)
-		unpack_usage();
+		unpack_usage(EXIT_SUCCESS);
 
 	parse_fip(argv[0], NULL);
 
@@ -986,7 +986,7 @@
 	return 0;
 }
 
-static void unpack_usage(void)
+static void unpack_usage(int exit_status)
 {
 	toc_entry_t *toc_entry = toc_entries;
 
@@ -1003,7 +1003,7 @@
 		    toc_entry->name);
 	printf("\n");
 	printf("If no options are provided, all images will be unpacked.\n");
-	exit(1);
+	exit(exit_status);
 }
 
 static int remove_cmd(int argc, char *argv[])
@@ -1017,7 +1017,7 @@
 	int fflag = 0;
 
 	if (argc < 2)
-		remove_usage();
+		remove_usage(EXIT_FAILURE);
 
 	opts = fill_common_opts(opts, &nr_opts, no_argument);
 	opts = add_opt(opts, &nr_opts, "align", required_argument, OPT_ALIGN);
@@ -1053,7 +1053,7 @@
 			    filename, sizeof(filename));
 
 			if (memcmp(&uuid, &uuid_null, sizeof(uuid_t)) == 0)
-				remove_usage();
+				remove_usage(EXIT_FAILURE);
 
 			desc = lookup_image_desc_from_uuid(&uuid);
 			if (desc == NULL) {
@@ -1071,7 +1071,7 @@
 			snprintf(outfile, sizeof(outfile), "%s", optarg);
 			break;
 		default:
-			remove_usage();
+			remove_usage(EXIT_FAILURE);
 		}
 	}
 	argc -= optind;
@@ -1079,7 +1079,7 @@
 	free(opts);
 
 	if (argc == 0)
-		remove_usage();
+		remove_usage(EXIT_SUCCESS);
 
 	if (outfile[0] != '\0' && access(outfile, F_OK) == 0 && !fflag)
 		log_errx("File %s already exists, use --force to overwrite it",
@@ -1110,7 +1110,7 @@
 	return 0;
 }
 
-static void remove_usage(void)
+static void remove_usage(int exit_status)
 {
 	toc_entry_t *toc_entry = toc_entries;
 
@@ -1126,7 +1126,7 @@
 	for (; toc_entry->cmdline_name != NULL; toc_entry++)
 		printf("  --%-16s\t%s\n", toc_entry->cmdline_name,
 		    toc_entry->name);
-	exit(1);
+	exit(exit_status);
 }
 
 static int version_cmd(int argc, char *argv[])
@@ -1140,10 +1140,10 @@
 	return 0;
 }
 
-static void version_usage(void)
+static void version_usage(int exit_status)
 {
 	printf("fiptool version\n");
-	exit(1);
+	exit(exit_status);
 }
 
 static int help_cmd(int argc, char *argv[])
@@ -1157,7 +1157,7 @@
 	for (i = 0; i < NELEM(cmds); i++) {
 		if (strcmp(cmds[i].name, argv[0]) == 0 &&
 		    cmds[i].usage != NULL)
-			cmds[i].usage();
+			cmds[i].usage(EXIT_SUCCESS);
 	}
 	if (i == NELEM(cmds))
 		printf("No help for subcommand '%s'\n", argv[0]);
@@ -1178,7 +1178,7 @@
 	printf("  remove\tRemove images from FIP.\n");
 	printf("  version\tShow fiptool version.\n");
 	printf("  help\t\tShow help for given command.\n");
-	exit(1);
+	exit(EXIT_SUCCESS);
 }
 
 int main(int argc, char *argv[])
diff --git a/tools/fiptool/fiptool.h b/tools/fiptool/fiptool.h
index af3fcbd..88c4a7e 100644
--- a/tools/fiptool/fiptool.h
+++ b/tools/fiptool/fiptool.h
@@ -48,7 +48,7 @@
 typedef struct cmd {
 	char              *name;
 	int              (*handler)(int, char **);
-	void             (*usage)(void);
+	void             (*usage)(int);
 } cmd_t;
 
 #endif /* FIPTOOL_H */