arch/arm/mach-imx/imx8m/soc.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2017 NXP
  *
  * Peng Fan <peng.fan@nxp.com>
  */

 #include <common.h>
 #include <cpu_func.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/mach-imx/hab.h>
 #include <asm/mach-imx/boot_mode.h>
 #include <asm/mach-imx/syscounter.h>
 #include <asm/armv8/mmu.h>
 #include <dm/uclass.h>
 #include <errno.h>
 #include <fdt_support.h>
 #include <fsl_wdog.h>
 #include <imx_sip.h>

 DECLARE_GLOBAL_DATA_PTR;

 #if defined(CONFIG_IMX_HAB)
 struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
 	.bank = 1,
 	.word = 3,
 };
 #endif

 int timer_init(void)
 {
 #ifdef CONFIG_SPL_BUILD
 	struct sctr_regs *sctr = (struct sctr_regs *)SYSCNT_CTRL_BASE_ADDR;
 	unsigned long freq = readl(&sctr->cntfid0);

 	/* Update with accurate clock frequency */
 	asm volatile("msr cntfrq_el0, %0" : : "r" (freq) : "memory");

 	clrsetbits_le32(&sctr->cntcr, SC_CNTCR_FREQ0 | SC_CNTCR_FREQ1,
 			SC_CNTCR_FREQ0 | SC_CNTCR_ENABLE | SC_CNTCR_HDBG);
 #endif

 	gd->arch.tbl = 0;
 	gd->arch.tbu = 0;

 	return 0;
 }

 void enable_tzc380(void)
 {
 	struct iomuxc_gpr_base_regs *gpr =
 		(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;

 	/* Enable TZASC and lock setting */
 	setbits_le32(&gpr->gpr[10], GPR_TZASC_EN);
 	setbits_le32(&gpr->gpr[10], GPR_TZASC_EN_LOCK);
 	if (is_imx8mm() || is_imx8mn() || is_imx8mp())
 		setbits_le32(&gpr->gpr[10], BIT(1));
 	/*
 	 * set Region 0 attribute to allow secure and non-secure
 	 * read/write permission. Found some masters like usb dwc3
 	 * controllers can't work with secure memory.
 	 */
 	writel(0xf0000000, TZASC_BASE_ADDR + 0x108);
 }

 void set_wdog_reset(struct wdog_regs *wdog)
 {
 	/*
 	 * Output WDOG_B signal to reset external pmic or POR_B decided by
 	 * the board design. Without external reset, the peripherals/DDR/
 	 * PMIC are not reset, that may cause system working abnormal.
 	 * WDZST bit is write-once only bit. Align this bit in kernel,
 	 * otherwise kernel code will have no chance to set this bit.
 	 */
 	setbits_le16(&wdog->wcr, WDOG_WDT_MASK | WDOG_WDZST_MASK);
 }

 static struct mm_region imx8m_mem_map[] = {
 	{
 		/* ROM */
 		.virt = 0x0UL,
 		.phys = 0x0UL,
 		.size = 0x100000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 			 PTE_BLOCK_OUTER_SHARE
 	}, {
 		/* CAAM */
 		.virt = 0x100000UL,
 		.phys = 0x100000UL,
 		.size = 0x8000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
 	}, {
 		/* TCM */
 		.virt = 0x7C0000UL,
 		.phys = 0x7C0000UL,
 		.size = 0x80000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
 	}, {
 		/* OCRAM */
 		.virt = 0x900000UL,
 		.phys = 0x900000UL,
 		.size = 0x200000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 			 PTE_BLOCK_OUTER_SHARE
 	}, {
 		/* AIPS */
 		.virt = 0xB00000UL,
 		.phys = 0xB00000UL,
 		.size = 0x3f500000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
 	}, {
 		/* DRAM1 */
 		.virt = 0x40000000UL,
 		.phys = 0x40000000UL,
 		.size = PHYS_SDRAM_SIZE,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 			 PTE_BLOCK_OUTER_SHARE
 #ifdef PHYS_SDRAM_2_SIZE
 	}, {
 		/* DRAM2 */
 		.virt = 0x100000000UL,
 		.phys = 0x100000000UL,
 		.size = PHYS_SDRAM_2_SIZE,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 			 PTE_BLOCK_OUTER_SHARE
 #endif
 	}, {
 		/* List terminator */
 		0,
 	}
 };

 struct mm_region *mem_map = imx8m_mem_map;

 void enable_caches(void)
 {
 	/*
 	 * If OPTEE runs, remove OPTEE memory from MMU table to
 	 * avoid speculative prefetch. OPTEE runs at the top of
 	 * the first memory bank
 	 */
 	if (rom_pointer[1])
 		imx8m_mem_map[5].size -= rom_pointer[1];

 	icache_enable();
 	dcache_enable();
 }

 static u32 get_cpu_variant_type(u32 type)
 {
 	struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
 	struct fuse_bank *bank = &ocotp->bank[1];
 	struct fuse_bank1_regs *fuse =
 		(struct fuse_bank1_regs *)bank->fuse_regs;

 	u32 value = readl(&fuse->tester4);

 	if (type == MXC_CPU_IMX8MQ) {
 		if ((value & 0x3) == 0x2)
 			return MXC_CPU_IMX8MD;
 		else if (value & 0x200000)
 			return MXC_CPU_IMX8MQL;

 	} else if (type == MXC_CPU_IMX8MM) {
 		switch (value & 0x3) {
 		case 2:
 			if (value & 0x1c0000)
 				return MXC_CPU_IMX8MMDL;
 			else
 				return MXC_CPU_IMX8MMD;
 		case 3:
 			if (value & 0x1c0000)
 				return MXC_CPU_IMX8MMSL;
 			else
 				return MXC_CPU_IMX8MMS;
 		default:
 			if (value & 0x1c0000)
 				return MXC_CPU_IMX8MML;
 			break;
 		}
 	} else if (type == MXC_CPU_IMX8MN) {
 		switch (value & 0x3) {
 		case 2:
 			if (value & 0x1000000)
 				return MXC_CPU_IMX8MNDL;
 			else
 				return MXC_CPU_IMX8MND;
 		case 3:
 			if (value & 0x1000000)
 				return MXC_CPU_IMX8MNSL;
 			else
 				return MXC_CPU_IMX8MNS;
 		default:
 			if (value & 0x1000000)
 				return MXC_CPU_IMX8MNL;
 			break;
 		}
 	}

 	return type;
 }

 u32 get_cpu_rev(void)
 {
 	struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
 	u32 reg = readl(&ana_pll->digprog);
 	u32 type = (reg >> 16) & 0xff;
 	u32 major_low = (reg >> 8) & 0xff;
 	u32 rom_version;

 	reg &= 0xff;

 	/* iMX8MP */
 	if (major_low == 0x43) {
 		return (MXC_CPU_IMX8MP << 12) | reg;
 	} else if (major_low == 0x42) {
 		/* iMX8MN */
 		type = get_cpu_variant_type(MXC_CPU_IMX8MN);
 	} else if (major_low == 0x41) {
 		type = get_cpu_variant_type(MXC_CPU_IMX8MM);
 	} else {
 		if (reg == CHIP_REV_1_0) {
 			/*
 			 * For B0 chip, the DIGPROG is not updated,
 			 * it is still TO1.0. we have to check ROM
 			 * version or OCOTP_READ_FUSE_DATA.
 			 * 0xff0055aa is magic number for B1.
 			 */
 			if (readl((void __iomem *)(OCOTP_BASE_ADDR + 0x40)) == 0xff0055aa) {
 				reg = CHIP_REV_2_1;
 			} else {
 				rom_version =
 					readl((void __iomem *)ROM_VERSION_A0);
 				if (rom_version != CHIP_REV_1_0) {
 					rom_version = readl((void __iomem *)ROM_VERSION_B0);
 					rom_version &= 0xff;
 					if (rom_version == CHIP_REV_2_0)
 						reg = CHIP_REV_2_0;
 				}
 			}
 		}

 		type = get_cpu_variant_type(type);
 	}

 	return (type << 12) | reg;
 }

 static void imx_set_wdog_powerdown(bool enable)
 {
 	struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
 	struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
 	struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR;

 	/* Write to the PDE (Power Down Enable) bit */
 	writew(enable, &wdog1->wmcr);
 	writew(enable, &wdog2->wmcr);
 	writew(enable, &wdog3->wmcr);
 }

 int arch_cpu_init_dm(void)
 {
 	struct udevice *dev;
 	int ret;

 	if (CONFIG_IS_ENABLED(CLK)) {
 		ret = uclass_get_device_by_name(UCLASS_CLK,
 						"clock-controller@30380000",
 						&dev);
 		if (ret < 0) {
 			printf("Failed to find clock node. Check device tree\n");
 			return ret;
 		}
 	}

 	return 0;
 }

 int arch_cpu_init(void)
 {
 	struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
 	/*
 	 * ROM might disable clock for SCTR,
 	 * enable the clock before timer_init.
 	 */
 	if (IS_ENABLED(CONFIG_SPL_BUILD))
 		clock_enable(CCGR_SCTR, 1);
 	/*
 	 * Init timer at very early state, because sscg pll setting
 	 * will use it
 	 */
 	timer_init();

 	if (IS_ENABLED(CONFIG_SPL_BUILD)) {
 		clock_init();
 		imx_set_wdog_powerdown(false);
 	}

 	if (is_imx8mq()) {
 		clock_enable(CCGR_OCOTP, 1);
 		if (readl(&ocotp->ctrl) & 0x200)
 			writel(0x200, &ocotp->ctrl_clr);
 	}

 	return 0;
 }

 #if defined(CONFIG_IMX8MN) || defined(CONFIG_IMX8MP)
 struct rom_api *g_rom_api = (struct rom_api *)0x980;

 enum boot_device get_boot_device(void)
 {
 	volatile gd_t *pgd = gd;
 	int ret;
 	u32 boot;
 	u16 boot_type;
 	u8 boot_instance;
 	enum boot_device boot_dev = SD1_BOOT;

 	ret = g_rom_api->query_boot_infor(QUERY_BT_DEV, &boot,
 					  ((uintptr_t)&boot) ^ QUERY_BT_DEV);
 	gd = pgd;

 	if (ret != ROM_API_OKAY) {
 		puts("ROMAPI: failure at query_boot_info\n");
 		return -1;
 	}

 	boot_type = boot >> 16;
 	boot_instance = (boot >> 8) & 0xff;

 	switch (boot_type) {
 	case BT_DEV_TYPE_SD:
 		boot_dev = boot_instance + SD1_BOOT;
 		break;
 	case BT_DEV_TYPE_MMC:
 		boot_dev = boot_instance + MMC1_BOOT;
 		break;
 	case BT_DEV_TYPE_NAND:
 		boot_dev = NAND_BOOT;
 		break;
 	case BT_DEV_TYPE_FLEXSPINOR:
 		boot_dev = QSPI_BOOT;
 		break;
 	case BT_DEV_TYPE_USB:
 		boot_dev = USB_BOOT;
 		break;
 	default:
 		break;
 	}

 	return boot_dev;
 }
 #endif

 bool is_usb_boot(void)
 {
 	return get_boot_device() == USB_BOOT;
 }

 #ifdef CONFIG_OF_SYSTEM_SETUP
 int ft_system_setup(void *blob, bd_t *bd)
 {
 	int i = 0;
 	int rc;
 	int nodeoff;

 	/* Disable the CPU idle for A0 chip since the HW does not support it */
 	if (is_soc_rev(CHIP_REV_1_0)) {
 		static const char * const nodes_path[] = {
 			"/cpus/cpu@0",
 			"/cpus/cpu@1",
 			"/cpus/cpu@2",
 			"/cpus/cpu@3",
 		};

 		for (i = 0; i < ARRAY_SIZE(nodes_path); i++) {
 			nodeoff = fdt_path_offset(blob, nodes_path[i]);
 			if (nodeoff < 0)
 				continue; /* Not found, skip it */

 			debug("Found %s node\n", nodes_path[i]);

 			rc = fdt_delprop(blob, nodeoff, "cpu-idle-states");
 			if (rc == -FDT_ERR_NOTFOUND)
 				continue;
 			if (rc) {
 				printf("Unable to update property %s:%s, err=%s\n",
 				       nodes_path[i], "status", fdt_strerror(rc));
 				return rc;
 			}

 			debug("Remove %s:%s\n", nodes_path[i],
 			       "cpu-idle-states");
 		}
 	}

 	return 0;
 }
 #endif

 #if !CONFIG_IS_ENABLED(SYSRESET)
 void reset_cpu(ulong addr)
 {
 	struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;

 	/* Clear WDA to trigger WDOG_B immediately */
 	writew((SET_WCR_WT(1) | WCR_WDT | WCR_WDE | WCR_SRS), &wdog->wcr);

 	while (1) {
 		/*
 		 * spin for .5 seconds before reset
 		 */
 	}
 }
 #endif

 #if defined(CONFIG_ARCH_MISC_INIT)
 static void acquire_buildinfo(void)
 {
 	u64 atf_commit = 0;

 	/* Get ARM Trusted Firmware commit id */
 	atf_commit = call_imx_sip(IMX_SIP_BUILDINFO,
 				  IMX_SIP_BUILDINFO_GET_COMMITHASH, 0, 0, 0);
 	if (atf_commit == 0xffffffff) {
 		debug("ATF does not support build info\n");
 		atf_commit = 0x30; /* Display 0, 0 ascii is 0x30 */
 	}

 	printf("\n BuildInfo:\n  - ATF %s\n\n", (char *)&atf_commit);
 }

 int arch_misc_init(void)
 {
 	acquire_buildinfo();

 	return 0;
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2017 NXP
	*
	* Peng Fan <peng.fan@nxp.com>
	*/

	#include <common.h>
	#include <cpu_func.h>
	#include <asm/arch/imx-regs.h>
	#include <asm/io.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/mach-imx/hab.h>
	#include <asm/mach-imx/boot_mode.h>
	#include <asm/mach-imx/syscounter.h>
	#include <asm/armv8/mmu.h>
	#include <dm/uclass.h>
	#include <errno.h>
	#include <fdt_support.h>
	#include <fsl_wdog.h>
	#include <imx_sip.h>

	DECLARE_GLOBAL_DATA_PTR;

	#if defined(CONFIG_IMX_HAB)
	struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
	.bank = 1,
	.word = 3,
	};
	#endif

	int timer_init(void)
	{
	#ifdef CONFIG_SPL_BUILD
	struct sctr_regs sctr = (struct sctr_regs )SYSCNT_CTRL_BASE_ADDR;
	unsigned long freq = readl(&sctr->cntfid0);

	/* Update with accurate clock frequency */
	asm volatile("msr cntfrq_el0, %0" : : "r" (freq) : "memory");

	clrsetbits_le32(&sctr->cntcr, SC_CNTCR_FREQ0 \| SC_CNTCR_FREQ1,
	SC_CNTCR_FREQ0 \| SC_CNTCR_ENABLE \| SC_CNTCR_HDBG);
	#endif

	gd->arch.tbl = 0;
	gd->arch.tbu = 0;

	return 0;
	}

	void enable_tzc380(void)
	{
	struct iomuxc_gpr_base_regs *gpr =
	(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;

	/* Enable TZASC and lock setting */
	setbits_le32(&gpr->gpr[10], GPR_TZASC_EN);
	setbits_le32(&gpr->gpr[10], GPR_TZASC_EN_LOCK);
	if (is_imx8mm() \|\| is_imx8mn() \|\| is_imx8mp())
	setbits_le32(&gpr->gpr[10], BIT(1));
	/*
	* set Region 0 attribute to allow secure and non-secure
	* read/write permission. Found some masters like usb dwc3
	* controllers can't work with secure memory.
	*/
	writel(0xf0000000, TZASC_BASE_ADDR + 0x108);
	}

	void set_wdog_reset(struct wdog_regs *wdog)
	{
	/*
	* Output WDOG_B signal to reset external pmic or POR_B decided by
	* the board design. Without external reset, the peripherals/DDR/
	* PMIC are not reset, that may cause system working abnormal.
	* WDZST bit is write-once only bit. Align this bit in kernel,
	* otherwise kernel code will have no chance to set this bit.
	*/
	setbits_le16(&wdog->wcr, WDOG_WDT_MASK \| WDOG_WDZST_MASK);
	}

	static struct mm_region imx8m_mem_map[] = {
	{
	/* ROM */
	.virt = 0x0UL,
	.phys = 0x0UL,
	.size = 0x100000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) \|
	PTE_BLOCK_OUTER_SHARE
	}, {
	/* CAAM */
	.virt = 0x100000UL,
	.phys = 0x100000UL,
	.size = 0x8000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \|
	PTE_BLOCK_NON_SHARE \|
	PTE_BLOCK_PXN \| PTE_BLOCK_UXN
	}, {
	/* TCM */
	.virt = 0x7C0000UL,
	.phys = 0x7C0000UL,
	.size = 0x80000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \|
	PTE_BLOCK_NON_SHARE \|
	PTE_BLOCK_PXN \| PTE_BLOCK_UXN
	}, {
	/* OCRAM */
	.virt = 0x900000UL,
	.phys = 0x900000UL,
	.size = 0x200000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) \|
	PTE_BLOCK_OUTER_SHARE
	}, {
	/* AIPS */
	.virt = 0xB00000UL,
	.phys = 0xB00000UL,
	.size = 0x3f500000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \|
	PTE_BLOCK_NON_SHARE \|
	PTE_BLOCK_PXN \| PTE_BLOCK_UXN
	}, {
	/* DRAM1 */
	.virt = 0x40000000UL,
	.phys = 0x40000000UL,
	.size = PHYS_SDRAM_SIZE,
	.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) \|
	PTE_BLOCK_OUTER_SHARE
	#ifdef PHYS_SDRAM_2_SIZE
	}, {
	/* DRAM2 */
	.virt = 0x100000000UL,
	.phys = 0x100000000UL,
	.size = PHYS_SDRAM_2_SIZE,
	.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) \|
	PTE_BLOCK_OUTER_SHARE
	#endif
	}, {
	/* List terminator */
	0,
	}
	};

	struct mm_region *mem_map = imx8m_mem_map;

	void enable_caches(void)
	{
	/*
	* If OPTEE runs, remove OPTEE memory from MMU table to
	* avoid speculative prefetch. OPTEE runs at the top of
	* the first memory bank
	*/
	if (rom_pointer[1])
	imx8m_mem_map[5].size -= rom_pointer[1];

	icache_enable();
	dcache_enable();
	}

	static u32 get_cpu_variant_type(u32 type)
	{
	struct ocotp_regs ocotp = (struct ocotp_regs )OCOTP_BASE_ADDR;
	struct fuse_bank *bank = &ocotp->bank[1];
	struct fuse_bank1_regs *fuse =
	(struct fuse_bank1_regs *)bank->fuse_regs;

	u32 value = readl(&fuse->tester4);

	if (type == MXC_CPU_IMX8MQ) {
	if ((value & 0x3) == 0x2)
	return MXC_CPU_IMX8MD;
	else if (value & 0x200000)
	return MXC_CPU_IMX8MQL;

	} else if (type == MXC_CPU_IMX8MM) {
	switch (value & 0x3) {
	case 2:
	if (value & 0x1c0000)
	return MXC_CPU_IMX8MMDL;
	else
	return MXC_CPU_IMX8MMD;
	case 3:
	if (value & 0x1c0000)
	return MXC_CPU_IMX8MMSL;
	else
	return MXC_CPU_IMX8MMS;
	default:
	if (value & 0x1c0000)
	return MXC_CPU_IMX8MML;
	break;
	}
	} else if (type == MXC_CPU_IMX8MN) {
	switch (value & 0x3) {
	case 2:
	if (value & 0x1000000)
	return MXC_CPU_IMX8MNDL;
	else
	return MXC_CPU_IMX8MND;
	case 3:
	if (value & 0x1000000)
	return MXC_CPU_IMX8MNSL;
	else
	return MXC_CPU_IMX8MNS;
	default:
	if (value & 0x1000000)
	return MXC_CPU_IMX8MNL;
	break;
	}
	}

	return type;
	}

	u32 get_cpu_rev(void)
	{
	struct anamix_pll ana_pll = (struct anamix_pll )ANATOP_BASE_ADDR;
	u32 reg = readl(&ana_pll->digprog);
	u32 type = (reg >> 16) & 0xff;
	u32 major_low = (reg >> 8) & 0xff;
	u32 rom_version;

	reg &= 0xff;

	/* iMX8MP */
	if (major_low == 0x43) {
	return (MXC_CPU_IMX8MP << 12) \| reg;
	} else if (major_low == 0x42) {
	/* iMX8MN */
	type = get_cpu_variant_type(MXC_CPU_IMX8MN);
	} else if (major_low == 0x41) {
	type = get_cpu_variant_type(MXC_CPU_IMX8MM);
	} else {
	if (reg == CHIP_REV_1_0) {
	/*
	* For B0 chip, the DIGPROG is not updated,
	* it is still TO1.0. we have to check ROM
	* version or OCOTP_READ_FUSE_DATA.
	* 0xff0055aa is magic number for B1.
	*/
	if (readl((void __iomem *)(OCOTP_BASE_ADDR + 0x40)) == 0xff0055aa) {
	reg = CHIP_REV_2_1;
	} else {
	rom_version =
	readl((void __iomem *)ROM_VERSION_A0);
	if (rom_version != CHIP_REV_1_0) {
	rom_version = readl((void __iomem *)ROM_VERSION_B0);
	rom_version &= 0xff;
	if (rom_version == CHIP_REV_2_0)
	reg = CHIP_REV_2_0;
	}
	}
	}

	type = get_cpu_variant_type(type);
	}

	return (type << 12) \| reg;
	}

	static void imx_set_wdog_powerdown(bool enable)
	{
	struct wdog_regs wdog1 = (struct wdog_regs )WDOG1_BASE_ADDR;
	struct wdog_regs wdog2 = (struct wdog_regs )WDOG2_BASE_ADDR;
	struct wdog_regs wdog3 = (struct wdog_regs )WDOG3_BASE_ADDR;

	/* Write to the PDE (Power Down Enable) bit */
	writew(enable, &wdog1->wmcr);
	writew(enable, &wdog2->wmcr);
	writew(enable, &wdog3->wmcr);
	}

	int arch_cpu_init_dm(void)
	{
	struct udevice *dev;
	int ret;

	if (CONFIG_IS_ENABLED(CLK)) {
	ret = uclass_get_device_by_name(UCLASS_CLK,
	"clock-controller@30380000",
	&dev);
	if (ret < 0) {
	printf("Failed to find clock node. Check device tree\n");
	return ret;
	}
	}

	return 0;
	}

	int arch_cpu_init(void)
	{
	struct ocotp_regs ocotp = (struct ocotp_regs )OCOTP_BASE_ADDR;
	/*
	* ROM might disable clock for SCTR,
	* enable the clock before timer_init.
	*/
	if (IS_ENABLED(CONFIG_SPL_BUILD))
	clock_enable(CCGR_SCTR, 1);
	/*
	* Init timer at very early state, because sscg pll setting
	* will use it
	*/
	timer_init();

	if (IS_ENABLED(CONFIG_SPL_BUILD)) {
	clock_init();
	imx_set_wdog_powerdown(false);
	}

	if (is_imx8mq()) {
	clock_enable(CCGR_OCOTP, 1);
	if (readl(&ocotp->ctrl) & 0x200)
	writel(0x200, &ocotp->ctrl_clr);
	}

	return 0;
	}

	#if defined(CONFIG_IMX8MN) \|\| defined(CONFIG_IMX8MP)
	struct rom_api g_rom_api = (struct rom_api )0x980;

	enum boot_device get_boot_device(void)
	{
	volatile gd_t *pgd = gd;
	int ret;
	u32 boot;
	u16 boot_type;
	u8 boot_instance;
	enum boot_device boot_dev = SD1_BOOT;

	ret = g_rom_api->query_boot_infor(QUERY_BT_DEV, &boot,
	((uintptr_t)&boot) ^ QUERY_BT_DEV);
	gd = pgd;

	if (ret != ROM_API_OKAY) {
	puts("ROMAPI: failure at query_boot_info\n");
	return -1;
	}

	boot_type = boot >> 16;
	boot_instance = (boot >> 8) & 0xff;

	switch (boot_type) {
	case BT_DEV_TYPE_SD:
	boot_dev = boot_instance + SD1_BOOT;
	break;
	case BT_DEV_TYPE_MMC:
	boot_dev = boot_instance + MMC1_BOOT;
	break;
	case BT_DEV_TYPE_NAND:
	boot_dev = NAND_BOOT;
	break;
	case BT_DEV_TYPE_FLEXSPINOR:
	boot_dev = QSPI_BOOT;
	break;
	case BT_DEV_TYPE_USB:
	boot_dev = USB_BOOT;
	break;
	default:
	break;
	}

	return boot_dev;
	}
	#endif

	bool is_usb_boot(void)
	{
	return get_boot_device() == USB_BOOT;
	}

	#ifdef CONFIG_OF_SYSTEM_SETUP
	int ft_system_setup(void blob, bd_t bd)
	{
	int i = 0;
	int rc;
	int nodeoff;

	/* Disable the CPU idle for A0 chip since the HW does not support it */
	if (is_soc_rev(CHIP_REV_1_0)) {
	static const char * const nodes_path[] = {
	"/cpus/cpu@0",
	"/cpus/cpu@1",
	"/cpus/cpu@2",
	"/cpus/cpu@3",
	};

	for (i = 0; i < ARRAY_SIZE(nodes_path); i++) {
	nodeoff = fdt_path_offset(blob, nodes_path[i]);
	if (nodeoff < 0)
	continue; /* Not found, skip it */

	debug("Found %s node\n", nodes_path[i]);

	rc = fdt_delprop(blob, nodeoff, "cpu-idle-states");
	if (rc == -FDT_ERR_NOTFOUND)
	continue;
	if (rc) {
	printf("Unable to update property %s:%s, err=%s\n",
	nodes_path[i], "status", fdt_strerror(rc));
	return rc;
	}

	debug("Remove %s:%s\n", nodes_path[i],
	"cpu-idle-states");
	}
	}

	return 0;
	}
	#endif

	#if !CONFIG_IS_ENABLED(SYSRESET)
	void reset_cpu(ulong addr)
	{
	struct watchdog_regs wdog = (struct watchdog_regs )WDOG1_BASE_ADDR;

	/* Clear WDA to trigger WDOG_B immediately */
	writew((SET_WCR_WT(1) \| WCR_WDT \| WCR_WDE \| WCR_SRS), &wdog->wcr);

	while (1) {
	/*
	* spin for .5 seconds before reset
	*/
	}
	}
	#endif

	#if defined(CONFIG_ARCH_MISC_INIT)
	static void acquire_buildinfo(void)
	{
	u64 atf_commit = 0;

	/* Get ARM Trusted Firmware commit id */
	atf_commit = call_imx_sip(IMX_SIP_BUILDINFO,
	IMX_SIP_BUILDINFO_GET_COMMITHASH, 0, 0, 0);
	if (atf_commit == 0xffffffff) {
	debug("ATF does not support build info\n");
	atf_commit = 0x30; /* Display 0, 0 ascii is 0x30 */
	}

	printf("\n BuildInfo:\n - ATF %s\n\n", (char *)&atf_commit);
	}

	int arch_misc_init(void)
	{
	acquire_buildinfo();

	return 0;
	}
	#endif