arch/arm/mach-imx/imx8/cpu.c - manifest_repos/u-boot - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2018 NXP
  */

 #include <common.h>
 #include <clk.h>
 #include <cpu.h>
 #include <dm.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <dm/uclass.h>
 #include <errno.h>
 #include <asm/arch/sci/sci.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch-imx/cpu.h>
 #include <asm/armv8/cpu.h>
 #include <asm/armv8/mmu.h>
 #include <asm/mach-imx/boot_mode.h>

 DECLARE_GLOBAL_DATA_PTR;

 #define BT_PASSOVER_TAG	0x504F
 struct pass_over_info_t *get_pass_over_info(void)
 {
 	struct pass_over_info_t *p =
 		(struct pass_over_info_t *)PASS_OVER_INFO_ADDR;

 	if (p->barker != BT_PASSOVER_TAG ||
 	    p->len != sizeof(struct pass_over_info_t))
 		return NULL;

 	return p;
 }

 int arch_cpu_init(void)
 {
 	struct pass_over_info_t *pass_over = get_pass_over_info();

 	if (pass_over && pass_over->g_ap_mu == 0) {
 		/*
 		 * When ap_mu is 0, means the U-Boot booted
 		 * from first container
 		 */
 		sc_misc_boot_status(-1, SC_MISC_BOOT_STATUS_SUCCESS);
 	}

 	return 0;
 }

 int arch_cpu_init_dm(void)
 {
 	struct udevice *devp;
 	int node, ret;

 	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "fsl,imx8-mu");
 	ret = device_bind_driver_to_node(gd->dm_root, "imx8_scu", "imx8_scu",
 					 offset_to_ofnode(node), &devp);

 	if (ret) {
 		printf("could not find scu %d\n", ret);
 		return ret;
 	}

 	ret = device_probe(devp);
 	if (ret) {
 		printf("scu probe failed %d\n", ret);
 		return ret;
 	}

 	return 0;
 }

 int print_bootinfo(void)
 {
 	enum boot_device bt_dev = get_boot_device();

 	puts("Boot:  ");
 	switch (bt_dev) {
 	case SD1_BOOT:
 		puts("SD0\n");
 		break;
 	case SD2_BOOT:
 		puts("SD1\n");
 		break;
 	case SD3_BOOT:
 		puts("SD2\n");
 		break;
 	case MMC1_BOOT:
 		puts("MMC0\n");
 		break;
 	case MMC2_BOOT:
 		puts("MMC1\n");
 		break;
 	case MMC3_BOOT:
 		puts("MMC2\n");
 		break;
 	case FLEXSPI_BOOT:
 		puts("FLEXSPI\n");
 		break;
 	case SATA_BOOT:
 		puts("SATA\n");
 		break;
 	case NAND_BOOT:
 		puts("NAND\n");
 		break;
 	case USB_BOOT:
 		puts("USB\n");
 		break;
 	default:
 		printf("Unknown device %u\n", bt_dev);
 		break;
 	}

 	return 0;
 }

 enum boot_device get_boot_device(void)
 {
 	enum boot_device boot_dev = SD1_BOOT;

 	sc_rsrc_t dev_rsrc;

 	sc_misc_get_boot_dev(-1, &dev_rsrc);

 	switch (dev_rsrc) {
 	case SC_R_SDHC_0:
 		boot_dev = MMC1_BOOT;
 		break;
 	case SC_R_SDHC_1:
 		boot_dev = SD2_BOOT;
 		break;
 	case SC_R_SDHC_2:
 		boot_dev = SD3_BOOT;
 		break;
 	case SC_R_NAND:
 		boot_dev = NAND_BOOT;
 		break;
 	case SC_R_FSPI_0:
 		boot_dev = FLEXSPI_BOOT;
 		break;
 	case SC_R_SATA_0:
 		boot_dev = SATA_BOOT;
 		break;
 	case SC_R_USB_0:
 	case SC_R_USB_1:
 	case SC_R_USB_2:
 		boot_dev = USB_BOOT;
 		break;
 	default:
 		break;
 	}

 	return boot_dev;
 }

 #ifdef CONFIG_ENV_IS_IN_MMC
 __weak int board_mmc_get_env_dev(int devno)
 {
 	return CONFIG_SYS_MMC_ENV_DEV;
 }

 int mmc_get_env_dev(void)
 {
 	sc_rsrc_t dev_rsrc;
 	int devno;

 	sc_misc_get_boot_dev(-1, &dev_rsrc);

 	switch (dev_rsrc) {
 	case SC_R_SDHC_0:
 		devno = 0;
 		break;
 	case SC_R_SDHC_1:
 		devno = 1;
 		break;
 	case SC_R_SDHC_2:
 		devno = 2;
 		break;
 	default:
 		/* If not boot from sd/mmc, use default value */
 		return CONFIG_SYS_MMC_ENV_DEV;
 	}

 	return board_mmc_get_env_dev(devno);
 }
 #endif

 #define MEMSTART_ALIGNMENT  SZ_2M /* Align the memory start with 2MB */

 static int get_owned_memreg(sc_rm_mr_t mr, sc_faddr_t *addr_start,
 			    sc_faddr_t *addr_end)
 {
 	sc_faddr_t start, end;
 	int ret;
 	bool owned;

 	owned = sc_rm_is_memreg_owned(-1, mr);
 	if (owned) {
 		ret = sc_rm_get_memreg_info(-1, mr, &start, &end);
 		if (ret) {
 			printf("Memreg get info failed, %d\n", ret);
 			return -EINVAL;
 		}
 		debug("0x%llx -- 0x%llx\n", start, end);
 		*addr_start = start;
 		*addr_end = end;

 		return 0;
 	}

 	return -EINVAL;
 }

 phys_size_t get_effective_memsize(void)
 {
 	sc_rm_mr_t mr;
 	sc_faddr_t start, end, end1;
 	int err;

 	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;

 	for (mr = 0; mr < 64; mr++) {
 		err = get_owned_memreg(mr, &start, &end);
 		if (!err) {
 			start = roundup(start, MEMSTART_ALIGNMENT);
 			/* Too small memory region, not use it */
 			if (start > end)
 				continue;

 			/* Find the memory region runs the U-Boot */
 			if (start >= PHYS_SDRAM_1 && start <= end1 &&
 			    (start <= CONFIG_SYS_TEXT_BASE &&
 			    end >= CONFIG_SYS_TEXT_BASE)) {
 				if ((end + 1) <= ((sc_faddr_t)PHYS_SDRAM_1 +
 				    PHYS_SDRAM_1_SIZE))
 					return (end - PHYS_SDRAM_1 + 1);
 				else
 					return PHYS_SDRAM_1_SIZE;
 			}
 		}
 	}

 	return PHYS_SDRAM_1_SIZE;
 }

 int dram_init(void)
 {
 	sc_rm_mr_t mr;
 	sc_faddr_t start, end, end1, end2;
 	int err;

 	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;
 	end2 = (sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE;
 	for (mr = 0; mr < 64; mr++) {
 		err = get_owned_memreg(mr, &start, &end);
 		if (!err) {
 			start = roundup(start, MEMSTART_ALIGNMENT);
 			/* Too small memory region, not use it */
 			if (start > end)
 				continue;

 			if (start >= PHYS_SDRAM_1 && start <= end1) {
 				if ((end + 1) <= end1)
 					gd->ram_size += end - start + 1;
 				else
 					gd->ram_size += end1 - start;
 			} else if (start >= PHYS_SDRAM_2 && start <= end2) {
 				if ((end + 1) <= end2)
 					gd->ram_size += end - start + 1;
 				else
 					gd->ram_size += end2 - start;
 			}
 		}
 	}

 	/* If error, set to the default value */
 	if (!gd->ram_size) {
 		gd->ram_size = PHYS_SDRAM_1_SIZE;
 		gd->ram_size += PHYS_SDRAM_2_SIZE;
 	}
 	return 0;
 }

 static void dram_bank_sort(int current_bank)
 {
 	phys_addr_t start;
 	phys_size_t size;

 	while (current_bank > 0) {
 		if (gd->bd->bi_dram[current_bank - 1].start >
 		    gd->bd->bi_dram[current_bank].start) {
 			start = gd->bd->bi_dram[current_bank - 1].start;
 			size = gd->bd->bi_dram[current_bank - 1].size;

 			gd->bd->bi_dram[current_bank - 1].start =
 				gd->bd->bi_dram[current_bank].start;
 			gd->bd->bi_dram[current_bank - 1].size =
 				gd->bd->bi_dram[current_bank].size;

 			gd->bd->bi_dram[current_bank].start = start;
 			gd->bd->bi_dram[current_bank].size = size;
 		}
 		current_bank--;
 	}
 }

 int dram_init_banksize(void)
 {
 	sc_rm_mr_t mr;
 	sc_faddr_t start, end, end1, end2;
 	int i = 0;
 	int err;

 	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;
 	end2 = (sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE;

 	for (mr = 0; mr < 64 && i < CONFIG_NR_DRAM_BANKS; mr++) {
 		err = get_owned_memreg(mr, &start, &end);
 		if (!err) {
 			start = roundup(start, MEMSTART_ALIGNMENT);
 			if (start > end) /* Small memory region, no use it */
 				continue;

 			if (start >= PHYS_SDRAM_1 && start <= end1) {
 				gd->bd->bi_dram[i].start = start;

 				if ((end + 1) <= end1)
 					gd->bd->bi_dram[i].size =
 						end - start + 1;
 				else
 					gd->bd->bi_dram[i].size = end1 - start;

 				dram_bank_sort(i);
 				i++;
 			} else if (start >= PHYS_SDRAM_2 && start <= end2) {
 				gd->bd->bi_dram[i].start = start;

 				if ((end + 1) <= end2)
 					gd->bd->bi_dram[i].size =
 						end - start + 1;
 				else
 					gd->bd->bi_dram[i].size = end2 - start;

 				dram_bank_sort(i);
 				i++;
 			}
 		}
 	}

 	/* If error, set to the default value */
 	if (!i) {
 		gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 		gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
 		gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
 		gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
 	}

 	return 0;
 }

 static u64 get_block_attrs(sc_faddr_t addr_start)
 {
 	u64 attr = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | PTE_BLOCK_NON_SHARE |
 		PTE_BLOCK_PXN | PTE_BLOCK_UXN;

 	if ((addr_start >= PHYS_SDRAM_1 &&
 	     addr_start <= ((sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)) ||
 	    (addr_start >= PHYS_SDRAM_2 &&
 	     addr_start <= ((sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE)))
 		return (PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_OUTER_SHARE);

 	return attr;
 }

 static u64 get_block_size(sc_faddr_t addr_start, sc_faddr_t addr_end)
 {
 	sc_faddr_t end1, end2;

 	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;
 	end2 = (sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE;

 	if (addr_start >= PHYS_SDRAM_1 && addr_start <= end1) {
 		if ((addr_end + 1) > end1)
 			return end1 - addr_start;
 	} else if (addr_start >= PHYS_SDRAM_2 && addr_start <= end2) {
 		if ((addr_end + 1) > end2)
 			return end2 - addr_start;
 	}

 	return (addr_end - addr_start + 1);
 }

 #define MAX_PTE_ENTRIES 512
 #define MAX_MEM_MAP_REGIONS 16

 static struct mm_region imx8_mem_map[MAX_MEM_MAP_REGIONS];
 struct mm_region *mem_map = imx8_mem_map;

 void enable_caches(void)
 {
 	sc_rm_mr_t mr;
 	sc_faddr_t start, end;
 	int err, i;

 	/* Create map for registers access from 0x1c000000 to 0x80000000*/
 	imx8_mem_map[0].virt = 0x1c000000UL;
 	imx8_mem_map[0].phys = 0x1c000000UL;
 	imx8_mem_map[0].size = 0x64000000UL;
 	imx8_mem_map[0].attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE | PTE_BLOCK_PXN | PTE_BLOCK_UXN;

 	i = 1;
 	for (mr = 0; mr < 64 && i < MAX_MEM_MAP_REGIONS; mr++) {
 		err = get_owned_memreg(mr, &start, &end);
 		if (!err) {
 			imx8_mem_map[i].virt = start;
 			imx8_mem_map[i].phys = start;
 			imx8_mem_map[i].size = get_block_size(start, end);
 			imx8_mem_map[i].attrs = get_block_attrs(start);
 			i++;
 		}
 	}

 	if (i < MAX_MEM_MAP_REGIONS) {
 		imx8_mem_map[i].size = 0;
 		imx8_mem_map[i].attrs = 0;
 	} else {
 		puts("Error, need more MEM MAP REGIONS reserved\n");
 		icache_enable();
 		return;
 	}

 	for (i = 0; i < MAX_MEM_MAP_REGIONS; i++) {
 		debug("[%d] vir = 0x%llx phys = 0x%llx size = 0x%llx attrs = 0x%llx\n",
 		      i, imx8_mem_map[i].virt, imx8_mem_map[i].phys,
 		      imx8_mem_map[i].size, imx8_mem_map[i].attrs);
 	}

 	icache_enable();
 	dcache_enable();
 }

 #ifndef CONFIG_SYS_DCACHE_OFF
 u64 get_page_table_size(void)
 {
 	u64 one_pt = MAX_PTE_ENTRIES * sizeof(u64);
 	u64 size = 0;

 	/*
 	 * For each memory region, the max table size:
 	 * 2 level 3 tables + 2 level 2 tables + 1 level 1 table
 	 */
 	size = (2 + 2 + 1) * one_pt * MAX_MEM_MAP_REGIONS + one_pt;

 	/*
 	 * We need to duplicate our page table once to have an emergency pt to
 	 * resort to when splitting page tables later on
 	 */
 	size *= 2;

 	/*
 	 * We may need to split page tables later on if dcache settings change,
 	 * so reserve up to 4 (random pick) page tables for that.
 	 */
 	size += one_pt * 4;

 	return size;
 }
 #endif

 #define FUSE_MAC0_WORD0 708
 #define FUSE_MAC0_WORD1 709
 #define FUSE_MAC1_WORD0 710
 #define FUSE_MAC1_WORD1 711

 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 {
 	u32 word[2], val[2] = {};
 	int i, ret;

 	if (dev_id == 0) {
 		word[0] = FUSE_MAC0_WORD0;
 		word[1] = FUSE_MAC0_WORD1;
 	} else {
 		word[0] = FUSE_MAC1_WORD0;
 		word[1] = FUSE_MAC1_WORD1;
 	}

 	for (i = 0; i < 2; i++) {
 		ret = sc_misc_otp_fuse_read(-1, word[i], &val[i]);
 		if (ret < 0)
 			goto err;
 	}

 	mac[0] = val[0];
 	mac[1] = val[0] >> 8;
 	mac[2] = val[0] >> 16;
 	mac[3] = val[0] >> 24;
 	mac[4] = val[1];
 	mac[5] = val[1] >> 8;

 	debug("%s: MAC%d: %02x.%02x.%02x.%02x.%02x.%02x\n",
 	      __func__, dev_id, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 	return;
 err:
 	printf("%s: fuse %d, err: %d\n", __func__, word[i], ret);
 }

 #if CONFIG_IS_ENABLED(CPU)
 struct cpu_imx_platdata {
 	const char *name;
 	const char *rev;
 	const char *type;
 	u32 cpurev;
 	u32 freq_mhz;
 };

 u32 get_cpu_rev(void)
 {
 	u32 id = 0, rev = 0;
 	int ret;

 	ret = sc_misc_get_control(-1, SC_R_SYSTEM, SC_C_ID, &id);
 	if (ret)
 		return 0;

 	rev = (id >> 5)  & 0xf;
 	id = (id & 0x1f) + MXC_SOC_IMX8;  /* Dummy ID for chip */

 	return (id << 12) | rev;
 }

 const char *get_imx8_type(u32 imxtype)
 {
 	switch (imxtype) {
 	case MXC_CPU_IMX8QXP:
 	case MXC_CPU_IMX8QXP_A0:
 		return "QXP";
 	default:
 		return "??";
 	}
 }

 const char *get_imx8_rev(u32 rev)
 {
 	switch (rev) {
 	case CHIP_REV_A:
 		return "A";
 	case CHIP_REV_B:
 		return "B";
 	default:
 		return "?";
 	}
 }

 const char *get_core_name(void)
 {
 	if (is_cortex_a35())
 		return "A35";
 	else if (is_cortex_a53())
 		return "A53";
 	else if (is_cortex_a72())
 		return "A72";
 	else
 		return "?";
 }

 int cpu_imx_get_desc(struct udevice *dev, char *buf, int size)
 {
 	struct cpu_imx_platdata *plat = dev_get_platdata(dev);

 	if (size < 100)
 		return -ENOSPC;

 	snprintf(buf, size, "NXP i.MX8%s Rev%s %s at %u MHz\n",
 		 plat->type, plat->rev, plat->name, plat->freq_mhz);

 	return 0;
 }

 static int cpu_imx_get_info(struct udevice *dev, struct cpu_info *info)
 {
 	struct cpu_imx_platdata *plat = dev_get_platdata(dev);

 	info->cpu_freq = plat->freq_mhz * 1000;
 	info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU);
 	return 0;
 }

 static int cpu_imx_get_count(struct udevice *dev)
 {
 	return 4;
 }

 static int cpu_imx_get_vendor(struct udevice *dev,  char *buf, int size)
 {
 	snprintf(buf, size, "NXP");
 	return 0;
 }

 static const struct cpu_ops cpu_imx8_ops = {
 	.get_desc	= cpu_imx_get_desc,
 	.get_info	= cpu_imx_get_info,
 	.get_count	= cpu_imx_get_count,
 	.get_vendor	= cpu_imx_get_vendor,
 };

 static const struct udevice_id cpu_imx8_ids[] = {
 	{ .compatible = "arm,cortex-a35" },
 	{ }
 };

 static int imx8_cpu_probe(struct udevice *dev)
 {
 	struct cpu_imx_platdata *plat = dev_get_platdata(dev);
 	struct clk cpu_clk;
 	u32 cpurev;
 	int ret;

 	cpurev = get_cpu_rev();
 	plat->cpurev = cpurev;
 	plat->name = get_core_name();
 	plat->rev = get_imx8_rev(cpurev & 0xFFF);
 	plat->type = get_imx8_type((cpurev & 0xFF000) >> 12);

 	ret = clk_get_by_index(dev, 0, &cpu_clk);
 	if (ret) {
 		debug("%s: Failed to get CPU clk: %d\n", __func__, ret);
 		return 0;
 	}

 	plat->freq_mhz = clk_get_rate(&cpu_clk) / 1000000;
 	return 0;
 }

 U_BOOT_DRIVER(cpu_imx8_drv) = {
 	.name		= "imx8x_cpu",
 	.id		= UCLASS_CPU,
 	.of_match	= cpu_imx8_ids,
 	.ops		= &cpu_imx8_ops,
 	.probe		= imx8_cpu_probe,
 	.platdata_auto_alloc_size = sizeof(struct cpu_imx_platdata),
 	.flags		= DM_FLAG_PRE_RELOC,
 };
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2018 NXP
	*/

	#include <common.h>
	#include <clk.h>
	#include <cpu.h>
	#include <dm.h>
	#include <dm/device-internal.h>
	#include <dm/lists.h>
	#include <dm/uclass.h>
	#include <errno.h>
	#include <asm/arch/sci/sci.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/arch-imx/cpu.h>
	#include <asm/armv8/cpu.h>
	#include <asm/armv8/mmu.h>
	#include <asm/mach-imx/boot_mode.h>

	DECLARE_GLOBAL_DATA_PTR;

	#define BT_PASSOVER_TAG 0x504F
	struct pass_over_info_t *get_pass_over_info(void)
	{
	struct pass_over_info_t *p =
	(struct pass_over_info_t *)PASS_OVER_INFO_ADDR;

	if (p->barker != BT_PASSOVER_TAG \|\|
	p->len != sizeof(struct pass_over_info_t))
	return NULL;

	return p;
	}

	int arch_cpu_init(void)
	{
	struct pass_over_info_t *pass_over = get_pass_over_info();

	if (pass_over && pass_over->g_ap_mu == 0) {
	/*
	* When ap_mu is 0, means the U-Boot booted
	* from first container
	*/
	sc_misc_boot_status(-1, SC_MISC_BOOT_STATUS_SUCCESS);
	}

	return 0;
	}

	int arch_cpu_init_dm(void)
	{
	struct udevice *devp;
	int node, ret;

	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "fsl,imx8-mu");
	ret = device_bind_driver_to_node(gd->dm_root, "imx8_scu", "imx8_scu",
	offset_to_ofnode(node), &devp);

	if (ret) {
	printf("could not find scu %d\n", ret);
	return ret;
	}

	ret = device_probe(devp);
	if (ret) {
	printf("scu probe failed %d\n", ret);
	return ret;
	}

	return 0;
	}

	int print_bootinfo(void)
	{
	enum boot_device bt_dev = get_boot_device();

	puts("Boot: ");
	switch (bt_dev) {
	case SD1_BOOT:
	puts("SD0\n");
	break;
	case SD2_BOOT:
	puts("SD1\n");
	break;
	case SD3_BOOT:
	puts("SD2\n");
	break;
	case MMC1_BOOT:
	puts("MMC0\n");
	break;
	case MMC2_BOOT:
	puts("MMC1\n");
	break;
	case MMC3_BOOT:
	puts("MMC2\n");
	break;
	case FLEXSPI_BOOT:
	puts("FLEXSPI\n");
	break;
	case SATA_BOOT:
	puts("SATA\n");
	break;
	case NAND_BOOT:
	puts("NAND\n");
	break;
	case USB_BOOT:
	puts("USB\n");
	break;
	default:
	printf("Unknown device %u\n", bt_dev);
	break;
	}

	return 0;
	}

	enum boot_device get_boot_device(void)
	{
	enum boot_device boot_dev = SD1_BOOT;

	sc_rsrc_t dev_rsrc;

	sc_misc_get_boot_dev(-1, &dev_rsrc);

	switch (dev_rsrc) {
	case SC_R_SDHC_0:
	boot_dev = MMC1_BOOT;
	break;
	case SC_R_SDHC_1:
	boot_dev = SD2_BOOT;
	break;
	case SC_R_SDHC_2:
	boot_dev = SD3_BOOT;
	break;
	case SC_R_NAND:
	boot_dev = NAND_BOOT;
	break;
	case SC_R_FSPI_0:
	boot_dev = FLEXSPI_BOOT;
	break;
	case SC_R_SATA_0:
	boot_dev = SATA_BOOT;
	break;
	case SC_R_USB_0:
	case SC_R_USB_1:
	case SC_R_USB_2:
	boot_dev = USB_BOOT;
	break;
	default:
	break;
	}

	return boot_dev;
	}

	#ifdef CONFIG_ENV_IS_IN_MMC
	__weak int board_mmc_get_env_dev(int devno)
	{
	return CONFIG_SYS_MMC_ENV_DEV;
	}

	int mmc_get_env_dev(void)
	{
	sc_rsrc_t dev_rsrc;
	int devno;

	sc_misc_get_boot_dev(-1, &dev_rsrc);

	switch (dev_rsrc) {
	case SC_R_SDHC_0:
	devno = 0;
	break;
	case SC_R_SDHC_1:
	devno = 1;
	break;
	case SC_R_SDHC_2:
	devno = 2;
	break;
	default:
	/* If not boot from sd/mmc, use default value */
	return CONFIG_SYS_MMC_ENV_DEV;
	}

	return board_mmc_get_env_dev(devno);
	}
	#endif

	#define MEMSTART_ALIGNMENT SZ_2M /* Align the memory start with 2MB */

	static int get_owned_memreg(sc_rm_mr_t mr, sc_faddr_t *addr_start,
	sc_faddr_t *addr_end)
	{
	sc_faddr_t start, end;
	int ret;
	bool owned;

	owned = sc_rm_is_memreg_owned(-1, mr);
	if (owned) {
	ret = sc_rm_get_memreg_info(-1, mr, &start, &end);
	if (ret) {
	printf("Memreg get info failed, %d\n", ret);
	return -EINVAL;
	}
	debug("0x%llx -- 0x%llx\n", start, end);
	*addr_start = start;
	*addr_end = end;

	return 0;
	}

	return -EINVAL;
	}

	phys_size_t get_effective_memsize(void)
	{
	sc_rm_mr_t mr;
	sc_faddr_t start, end, end1;
	int err;

	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;

	for (mr = 0; mr < 64; mr++) {
	err = get_owned_memreg(mr, &start, &end);
	if (!err) {
	start = roundup(start, MEMSTART_ALIGNMENT);
	/* Too small memory region, not use it */
	if (start > end)
	continue;

	/* Find the memory region runs the U-Boot */
	if (start >= PHYS_SDRAM_1 && start <= end1 &&
	(start <= CONFIG_SYS_TEXT_BASE &&
	end >= CONFIG_SYS_TEXT_BASE)) {
	if ((end + 1) <= ((sc_faddr_t)PHYS_SDRAM_1 +
	PHYS_SDRAM_1_SIZE))
	return (end - PHYS_SDRAM_1 + 1);
	else
	return PHYS_SDRAM_1_SIZE;
	}
	}
	}

	return PHYS_SDRAM_1_SIZE;
	}

	int dram_init(void)
	{
	sc_rm_mr_t mr;
	sc_faddr_t start, end, end1, end2;
	int err;

	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;
	end2 = (sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE;
	for (mr = 0; mr < 64; mr++) {
	err = get_owned_memreg(mr, &start, &end);
	if (!err) {
	start = roundup(start, MEMSTART_ALIGNMENT);
	/* Too small memory region, not use it */
	if (start > end)
	continue;

	if (start >= PHYS_SDRAM_1 && start <= end1) {
	if ((end + 1) <= end1)
	gd->ram_size += end - start + 1;
	else
	gd->ram_size += end1 - start;
	} else if (start >= PHYS_SDRAM_2 && start <= end2) {
	if ((end + 1) <= end2)
	gd->ram_size += end - start + 1;
	else
	gd->ram_size += end2 - start;
	}
	}
	}

	/* If error, set to the default value */
	if (!gd->ram_size) {
	gd->ram_size = PHYS_SDRAM_1_SIZE;
	gd->ram_size += PHYS_SDRAM_2_SIZE;
	}
	return 0;
	}

	static void dram_bank_sort(int current_bank)
	{
	phys_addr_t start;
	phys_size_t size;

	while (current_bank > 0) {
	if (gd->bd->bi_dram[current_bank - 1].start >
	gd->bd->bi_dram[current_bank].start) {
	start = gd->bd->bi_dram[current_bank - 1].start;
	size = gd->bd->bi_dram[current_bank - 1].size;

	gd->bd->bi_dram[current_bank - 1].start =
	gd->bd->bi_dram[current_bank].start;
	gd->bd->bi_dram[current_bank - 1].size =
	gd->bd->bi_dram[current_bank].size;

	gd->bd->bi_dram[current_bank].start = start;
	gd->bd->bi_dram[current_bank].size = size;
	}
	current_bank--;
	}
	}

	int dram_init_banksize(void)
	{
	sc_rm_mr_t mr;
	sc_faddr_t start, end, end1, end2;
	int i = 0;
	int err;

	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;
	end2 = (sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE;

	for (mr = 0; mr < 64 && i < CONFIG_NR_DRAM_BANKS; mr++) {
	err = get_owned_memreg(mr, &start, &end);
	if (!err) {
	start = roundup(start, MEMSTART_ALIGNMENT);
	if (start > end) /* Small memory region, no use it */
	continue;

	if (start >= PHYS_SDRAM_1 && start <= end1) {
	gd->bd->bi_dram[i].start = start;

	if ((end + 1) <= end1)
	gd->bd->bi_dram[i].size =
	end - start + 1;
	else
	gd->bd->bi_dram[i].size = end1 - start;

	dram_bank_sort(i);
	i++;
	} else if (start >= PHYS_SDRAM_2 && start <= end2) {
	gd->bd->bi_dram[i].start = start;

	if ((end + 1) <= end2)
	gd->bd->bi_dram[i].size =
	end - start + 1;
	else
	gd->bd->bi_dram[i].size = end2 - start;

	dram_bank_sort(i);
	i++;
	}
	}
	}

	/* If error, set to the default value */
	if (!i) {
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
	gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
	}

	return 0;
	}

	static u64 get_block_attrs(sc_faddr_t addr_start)
	{
	u64 attr = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \| PTE_BLOCK_NON_SHARE \|
	PTE_BLOCK_PXN \| PTE_BLOCK_UXN;

	if ((addr_start >= PHYS_SDRAM_1 &&
	addr_start <= ((sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)) \|\|
	(addr_start >= PHYS_SDRAM_2 &&
	addr_start <= ((sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE)))
	return (PTE_BLOCK_MEMTYPE(MT_NORMAL) \| PTE_BLOCK_OUTER_SHARE);

	return attr;
	}

	static u64 get_block_size(sc_faddr_t addr_start, sc_faddr_t addr_end)
	{
	sc_faddr_t end1, end2;

	end1 = (sc_faddr_t)PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE;
	end2 = (sc_faddr_t)PHYS_SDRAM_2 + PHYS_SDRAM_2_SIZE;

	if (addr_start >= PHYS_SDRAM_1 && addr_start <= end1) {
	if ((addr_end + 1) > end1)
	return end1 - addr_start;
	} else if (addr_start >= PHYS_SDRAM_2 && addr_start <= end2) {
	if ((addr_end + 1) > end2)
	return end2 - addr_start;
	}

	return (addr_end - addr_start + 1);
	}

	#define MAX_PTE_ENTRIES 512
	#define MAX_MEM_MAP_REGIONS 16

	static struct mm_region imx8_mem_map[MAX_MEM_MAP_REGIONS];
	struct mm_region *mem_map = imx8_mem_map;

	void enable_caches(void)
	{
	sc_rm_mr_t mr;
	sc_faddr_t start, end;
	int err, i;

	/* Create map for registers access from 0x1c000000 to 0x80000000*/
	imx8_mem_map[0].virt = 0x1c000000UL;
	imx8_mem_map[0].phys = 0x1c000000UL;
	imx8_mem_map[0].size = 0x64000000UL;
	imx8_mem_map[0].attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \|
	PTE_BLOCK_NON_SHARE \| PTE_BLOCK_PXN \| PTE_BLOCK_UXN;

	i = 1;
	for (mr = 0; mr < 64 && i < MAX_MEM_MAP_REGIONS; mr++) {
	err = get_owned_memreg(mr, &start, &end);
	if (!err) {
	imx8_mem_map[i].virt = start;
	imx8_mem_map[i].phys = start;
	imx8_mem_map[i].size = get_block_size(start, end);
	imx8_mem_map[i].attrs = get_block_attrs(start);
	i++;
	}
	}

	if (i < MAX_MEM_MAP_REGIONS) {
	imx8_mem_map[i].size = 0;
	imx8_mem_map[i].attrs = 0;
	} else {
	puts("Error, need more MEM MAP REGIONS reserved\n");
	icache_enable();
	return;
	}

	for (i = 0; i < MAX_MEM_MAP_REGIONS; i++) {
	debug("[%d] vir = 0x%llx phys = 0x%llx size = 0x%llx attrs = 0x%llx\n",
	i, imx8_mem_map[i].virt, imx8_mem_map[i].phys,
	imx8_mem_map[i].size, imx8_mem_map[i].attrs);
	}

	icache_enable();
	dcache_enable();
	}

	#ifndef CONFIG_SYS_DCACHE_OFF
	u64 get_page_table_size(void)
	{
	u64 one_pt = MAX_PTE_ENTRIES * sizeof(u64);
	u64 size = 0;

	/*
	* For each memory region, the max table size:
	* 2 level 3 tables + 2 level 2 tables + 1 level 1 table
	*/
	size = (2 + 2 + 1) * one_pt * MAX_MEM_MAP_REGIONS + one_pt;

	/*
	* We need to duplicate our page table once to have an emergency pt to
	* resort to when splitting page tables later on
	*/
	size *= 2;

	/*
	* We may need to split page tables later on if dcache settings change,
	* so reserve up to 4 (random pick) page tables for that.
	*/
	size += one_pt * 4;

	return size;
	}
	#endif

	#define FUSE_MAC0_WORD0 708
	#define FUSE_MAC0_WORD1 709
	#define FUSE_MAC1_WORD0 710
	#define FUSE_MAC1_WORD1 711

	void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
	{
	u32 word[2], val[2] = {};
	int i, ret;

	if (dev_id == 0) {
	word[0] = FUSE_MAC0_WORD0;
	word[1] = FUSE_MAC0_WORD1;
	} else {
	word[0] = FUSE_MAC1_WORD0;
	word[1] = FUSE_MAC1_WORD1;
	}

	for (i = 0; i < 2; i++) {
	ret = sc_misc_otp_fuse_read(-1, word[i], &val[i]);
	if (ret < 0)
	goto err;
	}

	mac[0] = val[0];
	mac[1] = val[0] >> 8;
	mac[2] = val[0] >> 16;
	mac[3] = val[0] >> 24;
	mac[4] = val[1];
	mac[5] = val[1] >> 8;

	debug("%s: MAC%d: %02x.%02x.%02x.%02x.%02x.%02x\n",
	__func__, dev_id, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
	return;
	err:
	printf("%s: fuse %d, err: %d\n", __func__, word[i], ret);
	}

	#if CONFIG_IS_ENABLED(CPU)
	struct cpu_imx_platdata {
	const char *name;
	const char *rev;
	const char *type;
	u32 cpurev;
	u32 freq_mhz;
	};

	u32 get_cpu_rev(void)
	{
	u32 id = 0, rev = 0;
	int ret;

	ret = sc_misc_get_control(-1, SC_R_SYSTEM, SC_C_ID, &id);
	if (ret)
	return 0;

	rev = (id >> 5) & 0xf;
	id = (id & 0x1f) + MXC_SOC_IMX8; /* Dummy ID for chip */

	return (id << 12) \| rev;
	}

	const char *get_imx8_type(u32 imxtype)
	{
	switch (imxtype) {
	case MXC_CPU_IMX8QXP:
	case MXC_CPU_IMX8QXP_A0:
	return "QXP";
	default:
	return "??";
	}
	}

	const char *get_imx8_rev(u32 rev)
	{
	switch (rev) {
	case CHIP_REV_A:
	return "A";
	case CHIP_REV_B:
	return "B";
	default:
	return "?";
	}
	}

	const char *get_core_name(void)
	{
	if (is_cortex_a35())
	return "A35";
	else if (is_cortex_a53())
	return "A53";
	else if (is_cortex_a72())
	return "A72";
	else
	return "?";
	}

	int cpu_imx_get_desc(struct udevice dev, char buf, int size)
	{
	struct cpu_imx_platdata *plat = dev_get_platdata(dev);

	if (size < 100)
	return -ENOSPC;

	snprintf(buf, size, "NXP i.MX8%s Rev%s %s at %u MHz\n",
	plat->type, plat->rev, plat->name, plat->freq_mhz);

	return 0;
	}

	static int cpu_imx_get_info(struct udevice dev, struct cpu_info info)
	{
	struct cpu_imx_platdata *plat = dev_get_platdata(dev);

	info->cpu_freq = plat->freq_mhz * 1000;
	info->features = BIT(CPU_FEAT_L1_CACHE) \| BIT(CPU_FEAT_MMU);
	return 0;
	}

	static int cpu_imx_get_count(struct udevice *dev)
	{
	return 4;
	}

	static int cpu_imx_get_vendor(struct udevice dev, char buf, int size)
	{
	snprintf(buf, size, "NXP");
	return 0;
	}

	static const struct cpu_ops cpu_imx8_ops = {
	.get_desc = cpu_imx_get_desc,
	.get_info = cpu_imx_get_info,
	.get_count = cpu_imx_get_count,
	.get_vendor = cpu_imx_get_vendor,
	};

	static const struct udevice_id cpu_imx8_ids[] = {
	{ .compatible = "arm,cortex-a35" },
	{ }
	};

	static int imx8_cpu_probe(struct udevice *dev)
	{
	struct cpu_imx_platdata *plat = dev_get_platdata(dev);
	struct clk cpu_clk;
	u32 cpurev;
	int ret;

	cpurev = get_cpu_rev();
	plat->cpurev = cpurev;
	plat->name = get_core_name();
	plat->rev = get_imx8_rev(cpurev & 0xFFF);
	plat->type = get_imx8_type((cpurev & 0xFF000) >> 12);

	ret = clk_get_by_index(dev, 0, &cpu_clk);
	if (ret) {
	debug("%s: Failed to get CPU clk: %d\n", __func__, ret);
	return 0;
	}

	plat->freq_mhz = clk_get_rate(&cpu_clk) / 1000000;
	return 0;
	}

	U_BOOT_DRIVER(cpu_imx8_drv) = {
	.name = "imx8x_cpu",
	.id = UCLASS_CPU,
	.of_match = cpu_imx8_ids,
	.ops = &cpu_imx8_ops,
	.probe = imx8_cpu_probe,
	.platdata_auto_alloc_size = sizeof(struct cpu_imx_platdata),
	.flags = DM_FLAG_PRE_RELOC,
	};
	#endif