board/raspberrypi/rpi/rpi.c - u-boot-mtk - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) Copyright 2012-2016 Stephen Warren
  */

 #include <common.h>
 #include <config.h>
 #include <dm.h>
 #include <env.h>
 #include <efi_loader.h>
 #include <fdt_support.h>
 #include <fdt_simplefb.h>
 #include <lcd.h>
 #include <memalign.h>
 #include <mmc.h>
 #include <asm/gpio.h>
 #include <asm/arch/mbox.h>
 #include <asm/arch/msg.h>
 #include <asm/arch/sdhci.h>
 #include <asm/global_data.h>
 #include <dm/platform_data/serial_bcm283x_mu.h>
 #ifdef CONFIG_ARM64
 #include <asm/armv8/mmu.h>
 #endif
 #include <watchdog.h>
 #include <dm/pinctrl.h>

 DECLARE_GLOBAL_DATA_PTR;

 /* From lowlevel_init.S */
 extern unsigned long fw_dtb_pointer;

 /* TODO(sjg@chromium.org): Move these to the msg.c file */
 struct msg_get_arm_mem {
 	struct bcm2835_mbox_hdr hdr;
 	struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
 	u32 end_tag;
 };

 struct msg_get_board_rev {
 	struct bcm2835_mbox_hdr hdr;
 	struct bcm2835_mbox_tag_get_board_rev get_board_rev;
 	u32 end_tag;
 };

 struct msg_get_board_serial {
 	struct bcm2835_mbox_hdr hdr;
 	struct bcm2835_mbox_tag_get_board_serial get_board_serial;
 	u32 end_tag;
 };

 struct msg_get_mac_address {
 	struct bcm2835_mbox_hdr hdr;
 	struct bcm2835_mbox_tag_get_mac_address get_mac_address;
 	u32 end_tag;
 };

 struct msg_get_clock_rate {
 	struct bcm2835_mbox_hdr hdr;
 	struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
 	u32 end_tag;
 };

 #ifdef CONFIG_ARM64
 #define DTB_DIR "broadcom/"
 #else
 #define DTB_DIR ""
 #endif

 /*
  * https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
  */
 struct rpi_model {
 	const char *name;
 	const char *fdtfile;
 	bool has_onboard_eth;
 };

 static const struct rpi_model rpi_model_unknown = {
 	"Unknown model",
 	DTB_DIR "bcm283x-rpi-other.dtb",
 	false,
 };

 static const struct rpi_model rpi_models_new_scheme[] = {
 	[0x0] = {
 		"Model A",
 		DTB_DIR "bcm2835-rpi-a.dtb",
 		false,
 	},
 	[0x1] = {
 		"Model B",
 		DTB_DIR "bcm2835-rpi-b.dtb",
 		true,
 	},
 	[0x2] = {
 		"Model A+",
 		DTB_DIR "bcm2835-rpi-a-plus.dtb",
 		false,
 	},
 	[0x3] = {
 		"Model B+",
 		DTB_DIR "bcm2835-rpi-b-plus.dtb",
 		true,
 	},
 	[0x4] = {
 		"2 Model B",
 		DTB_DIR "bcm2836-rpi-2-b.dtb",
 		true,
 	},
 	[0x6] = {
 		"Compute Module",
 		DTB_DIR "bcm2835-rpi-cm.dtb",
 		false,
 	},
 	[0x8] = {
 		"3 Model B",
 		DTB_DIR "bcm2837-rpi-3-b.dtb",
 		true,
 	},
 	[0x9] = {
 		"Zero",
 		DTB_DIR "bcm2835-rpi-zero.dtb",
 		false,
 	},
 	[0xA] = {
 		"Compute Module 3",
 		DTB_DIR "bcm2837-rpi-cm3.dtb",
 		false,
 	},
 	[0xC] = {
 		"Zero W",
 		DTB_DIR "bcm2835-rpi-zero-w.dtb",
 		false,
 	},
 	[0xD] = {
 		"3 Model B+",
 		DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
 		true,
 	},
 	[0xE] = {
 		"3 Model A+",
 		DTB_DIR "bcm2837-rpi-3-a-plus.dtb",
 		false,
 	},
 	[0x10] = {
 		"Compute Module 3+",
 		DTB_DIR "bcm2837-rpi-cm3.dtb",
 		false,
 	},
 	[0x11] = {
 		"4 Model B",
 		DTB_DIR "bcm2711-rpi-4-b.dtb",
 		true,
 	},
 };

 static const struct rpi_model rpi_models_old_scheme[] = {
 	[0x2] = {
 		"Model B",
 		DTB_DIR "bcm2835-rpi-b.dtb",
 		true,
 	},
 	[0x3] = {
 		"Model B",
 		DTB_DIR "bcm2835-rpi-b.dtb",
 		true,
 	},
 	[0x4] = {
 		"Model B rev2",
 		DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 		true,
 	},
 	[0x5] = {
 		"Model B rev2",
 		DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 		true,
 	},
 	[0x6] = {
 		"Model B rev2",
 		DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 		true,
 	},
 	[0x7] = {
 		"Model A",
 		DTB_DIR "bcm2835-rpi-a.dtb",
 		false,
 	},
 	[0x8] = {
 		"Model A",
 		DTB_DIR "bcm2835-rpi-a.dtb",
 		false,
 	},
 	[0x9] = {
 		"Model A",
 		DTB_DIR "bcm2835-rpi-a.dtb",
 		false,
 	},
 	[0xd] = {
 		"Model B rev2",
 		DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 		true,
 	},
 	[0xe] = {
 		"Model B rev2",
 		DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 		true,
 	},
 	[0xf] = {
 		"Model B rev2",
 		DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 		true,
 	},
 	[0x10] = {
 		"Model B+",
 		DTB_DIR "bcm2835-rpi-b-plus.dtb",
 		true,
 	},
 	[0x11] = {
 		"Compute Module",
 		DTB_DIR "bcm2835-rpi-cm.dtb",
 		false,
 	},
 	[0x12] = {
 		"Model A+",
 		DTB_DIR "bcm2835-rpi-a-plus.dtb",
 		false,
 	},
 	[0x13] = {
 		"Model B+",
 		DTB_DIR "bcm2835-rpi-b-plus.dtb",
 		true,
 	},
 	[0x14] = {
 		"Compute Module",
 		DTB_DIR "bcm2835-rpi-cm.dtb",
 		false,
 	},
 	[0x15] = {
 		"Model A+",
 		DTB_DIR "bcm2835-rpi-a-plus.dtb",
 		false,
 	},
 };

 static uint32_t revision;
 static uint32_t rev_scheme;
 static uint32_t rev_type;
 static const struct rpi_model *model;

 #ifdef CONFIG_ARM64
 #ifndef CONFIG_BCM2711
 static struct mm_region bcm283x_mem_map[] = {
 	{
 		.virt = 0x00000000UL,
 		.phys = 0x00000000UL,
 		.size = 0x3f000000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 			 PTE_BLOCK_INNER_SHARE
 	}, {
 		.virt = 0x3f000000UL,
 		.phys = 0x3f000000UL,
 		.size = 0x01000000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
 	}, {
 		/* List terminator */
 		0,
 	}
 };
 #else
 static struct mm_region bcm283x_mem_map[] = {
 	{
 		.virt = 0x00000000UL,
 		.phys = 0x00000000UL,
 		.size = 0xfe000000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 			 PTE_BLOCK_INNER_SHARE
 	}, {
 		.virt = 0xfe000000UL,
 		.phys = 0xfe000000UL,
 		.size = 0x01800000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
 	}, {
 		/* List terminator */
 		0,
 	}
 };
 #endif
 struct mm_region *mem_map = bcm283x_mem_map;
 #endif

 int dram_init(void)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 	int ret;

 	BCM2835_MBOX_INIT_HDR(msg);
 	BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);

 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 	if (ret) {
 		printf("bcm2835: Could not query ARM memory size\n");
 		return -1;
 	}

 	gd->ram_size = msg->get_arm_mem.body.resp.mem_size;

 	return 0;
 }

 #ifdef CONFIG_OF_BOARD
 #ifdef CONFIG_BCM2711
 int dram_init_banksize(void)
 {
 	return fdtdec_decode_ram_size(gd->fdt_blob, NULL, 0, NULL,
 				     (phys_size_t *)&gd->ram_size, gd->bd);
 }
 #endif
 #endif

 static void set_fdtfile(void)
 {
 	const char *fdtfile;

 	if (env_get("fdtfile"))
 		return;

 	fdtfile = model->fdtfile;
 	env_set("fdtfile", fdtfile);
 }

 /*
  * If the firmware provided a valid FDT at boot time, let's expose it in
  * ${fdt_addr} so it may be passed unmodified to the kernel.
  */
 static void set_fdt_addr(void)
 {
 	if (env_get("fdt_addr"))
 		return;

 	if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 		return;

 	env_set_hex("fdt_addr", fw_dtb_pointer);
 }

 /*
  * Prevent relocation from stomping on a firmware provided FDT blob.
  */
 unsigned long board_get_usable_ram_top(unsigned long total_size)
 {
 	if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 		return gd->ram_top;
 	return fw_dtb_pointer & ~0xffff;
 }

 static void set_usbethaddr(void)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 	int ret;

 	if (!model->has_onboard_eth)
 		return;

 	if (env_get("usbethaddr"))
 		return;

 	BCM2835_MBOX_INIT_HDR(msg);
 	BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);

 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 	if (ret) {
 		printf("bcm2835: Could not query MAC address\n");
 		/* Ignore error; not critical */
 		return;
 	}

 	eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);

 	if (!env_get("ethaddr"))
 		env_set("ethaddr", env_get("usbethaddr"));

 	return;
 }

 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 static void set_board_info(void)
 {
 	char s[11];

 	snprintf(s, sizeof(s), "0x%X", revision);
 	env_set("board_revision", s);
 	snprintf(s, sizeof(s), "%d", rev_scheme);
 	env_set("board_rev_scheme", s);
 	/* Can't rename this to board_rev_type since it's an ABI for scripts */
 	snprintf(s, sizeof(s), "0x%X", rev_type);
 	env_set("board_rev", s);
 	env_set("board_name", model->name);
 }
 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */

 static void set_serial_number(void)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 	int ret;
 	char serial_string[17] = { 0 };

 	if (env_get("serial#"))
 		return;

 	BCM2835_MBOX_INIT_HDR(msg);
 	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);

 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 	if (ret) {
 		printf("bcm2835: Could not query board serial\n");
 		/* Ignore error; not critical */
 		return;
 	}

 	snprintf(serial_string, sizeof(serial_string), "%016llx",
 		 msg->get_board_serial.body.resp.serial);
 	env_set("serial#", serial_string);
 }

 int misc_init_r(void)
 {
 	set_fdt_addr();
 	set_fdtfile();
 	set_usbethaddr();
 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 	set_board_info();
 #endif
 	set_serial_number();

 	return 0;
 }

 static void get_board_rev(void)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 	int ret;
 	const struct rpi_model *models;
 	uint32_t models_count;

 	BCM2835_MBOX_INIT_HDR(msg);
 	BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);

 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 	if (ret) {
 		printf("bcm2835: Could not query board revision\n");
 		/* Ignore error; not critical */
 		return;
 	}

 	/*
 	 * For details of old-vs-new scheme, see:
 	 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 	 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 	 * (a few posts down)
 	 *
 	 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 	 * lower byte to use as the board rev:
 	 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 	 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 	 */
 	revision = msg->get_board_rev.body.resp.rev;
 	if (revision & 0x800000) {
 		rev_scheme = 1;
 		rev_type = (revision >> 4) & 0xff;
 		models = rpi_models_new_scheme;
 		models_count = ARRAY_SIZE(rpi_models_new_scheme);
 	} else {
 		rev_scheme = 0;
 		rev_type = revision & 0xff;
 		models = rpi_models_old_scheme;
 		models_count = ARRAY_SIZE(rpi_models_old_scheme);
 	}
 	if (rev_type >= models_count) {
 		printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 		model = &rpi_model_unknown;
 	} else if (!models[rev_type].name) {
 		printf("RPI: Board rev 0x%x unknown\n", rev_type);
 		model = &rpi_model_unknown;
 	} else {
 		model = &models[rev_type];
 	}

 	printf("RPI %s (0x%x)\n", model->name, revision);
 }

 int board_init(void)
 {
 #ifdef CONFIG_HW_WATCHDOG
 	hw_watchdog_init();
 #endif

 	get_board_rev();

 	gd->bd->bi_boot_params = 0x100;

 	return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 }

 /*
  * If the firmware passed a device tree use it for U-Boot.
  */
 void *board_fdt_blob_setup(void)
 {
 	if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 		return NULL;
 	return (void *)fw_dtb_pointer;
 }

 int ft_board_setup(void *blob, bd_t *bd)
 {
 	/*
 	 * For now, we simply always add the simplefb DT node. Later, we
 	 * should be more intelligent, and e.g. only do this if no enabled DT
 	 * node exists for the "real" graphics driver.
 	 */
 	lcd_dt_simplefb_add_node(blob);

 #ifdef CONFIG_EFI_LOADER
 	/* Reserve the spin table */
 	efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 #endif

 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* (C) Copyright 2012-2016 Stephen Warren
	*/

	#include <common.h>
	#include <config.h>
	#include <dm.h>
	#include <env.h>
	#include <efi_loader.h>
	#include <fdt_support.h>
	#include <fdt_simplefb.h>
	#include <lcd.h>
	#include <memalign.h>
	#include <mmc.h>
	#include <asm/gpio.h>
	#include <asm/arch/mbox.h>
	#include <asm/arch/msg.h>
	#include <asm/arch/sdhci.h>
	#include <asm/global_data.h>
	#include <dm/platform_data/serial_bcm283x_mu.h>
	#ifdef CONFIG_ARM64
	#include <asm/armv8/mmu.h>
	#endif
	#include <watchdog.h>
	#include <dm/pinctrl.h>

	DECLARE_GLOBAL_DATA_PTR;

	/* From lowlevel_init.S */
	extern unsigned long fw_dtb_pointer;

	/* TODO(sjg@chromium.org): Move these to the msg.c file */
	struct msg_get_arm_mem {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
	u32 end_tag;
	};

	struct msg_get_board_rev {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_get_board_rev get_board_rev;
	u32 end_tag;
	};

	struct msg_get_board_serial {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_get_board_serial get_board_serial;
	u32 end_tag;
	};

	struct msg_get_mac_address {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_get_mac_address get_mac_address;
	u32 end_tag;
	};

	struct msg_get_clock_rate {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
	u32 end_tag;
	};

	#ifdef CONFIG_ARM64
	#define DTB_DIR "broadcom/"
	#else
	#define DTB_DIR ""
	#endif

	/*
	* https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
	*/
	struct rpi_model {
	const char *name;
	const char *fdtfile;
	bool has_onboard_eth;
	};

	static const struct rpi_model rpi_model_unknown = {
	"Unknown model",
	DTB_DIR "bcm283x-rpi-other.dtb",
	false,
	};

	static const struct rpi_model rpi_models_new_scheme[] = {
	[0x0] = {
	"Model A",
	DTB_DIR "bcm2835-rpi-a.dtb",
	false,
	},
	[0x1] = {
	"Model B",
	DTB_DIR "bcm2835-rpi-b.dtb",
	true,
	},
	[0x2] = {
	"Model A+",
	DTB_DIR "bcm2835-rpi-a-plus.dtb",
	false,
	},
	[0x3] = {
	"Model B+",
	DTB_DIR "bcm2835-rpi-b-plus.dtb",
	true,
	},
	[0x4] = {
	"2 Model B",
	DTB_DIR "bcm2836-rpi-2-b.dtb",
	true,
	},
	[0x6] = {
	"Compute Module",
	DTB_DIR "bcm2835-rpi-cm.dtb",
	false,
	},
	[0x8] = {
	"3 Model B",
	DTB_DIR "bcm2837-rpi-3-b.dtb",
	true,
	},
	[0x9] = {
	"Zero",
	DTB_DIR "bcm2835-rpi-zero.dtb",
	false,
	},
	[0xA] = {
	"Compute Module 3",
	DTB_DIR "bcm2837-rpi-cm3.dtb",
	false,
	},
	[0xC] = {
	"Zero W",
	DTB_DIR "bcm2835-rpi-zero-w.dtb",
	false,
	},
	[0xD] = {
	"3 Model B+",
	DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
	true,
	},
	[0xE] = {
	"3 Model A+",
	DTB_DIR "bcm2837-rpi-3-a-plus.dtb",
	false,
	},
	[0x10] = {
	"Compute Module 3+",
	DTB_DIR "bcm2837-rpi-cm3.dtb",
	false,
	},
	[0x11] = {
	"4 Model B",
	DTB_DIR "bcm2711-rpi-4-b.dtb",
	true,
	},
	};

	static const struct rpi_model rpi_models_old_scheme[] = {
	[0x2] = {
	"Model B",
	DTB_DIR "bcm2835-rpi-b.dtb",
	true,
	},
	[0x3] = {
	"Model B",
	DTB_DIR "bcm2835-rpi-b.dtb",
	true,
	},
	[0x4] = {
	"Model B rev2",
	DTB_DIR "bcm2835-rpi-b-rev2.dtb",
	true,
	},
	[0x5] = {
	"Model B rev2",
	DTB_DIR "bcm2835-rpi-b-rev2.dtb",
	true,
	},
	[0x6] = {
	"Model B rev2",
	DTB_DIR "bcm2835-rpi-b-rev2.dtb",
	true,
	},
	[0x7] = {
	"Model A",
	DTB_DIR "bcm2835-rpi-a.dtb",
	false,
	},
	[0x8] = {
	"Model A",
	DTB_DIR "bcm2835-rpi-a.dtb",
	false,
	},
	[0x9] = {
	"Model A",
	DTB_DIR "bcm2835-rpi-a.dtb",
	false,
	},
	[0xd] = {
	"Model B rev2",
	DTB_DIR "bcm2835-rpi-b-rev2.dtb",
	true,
	},
	[0xe] = {
	"Model B rev2",
	DTB_DIR "bcm2835-rpi-b-rev2.dtb",
	true,
	},
	[0xf] = {
	"Model B rev2",
	DTB_DIR "bcm2835-rpi-b-rev2.dtb",
	true,
	},
	[0x10] = {
	"Model B+",
	DTB_DIR "bcm2835-rpi-b-plus.dtb",
	true,
	},
	[0x11] = {
	"Compute Module",
	DTB_DIR "bcm2835-rpi-cm.dtb",
	false,
	},
	[0x12] = {
	"Model A+",
	DTB_DIR "bcm2835-rpi-a-plus.dtb",
	false,
	},
	[0x13] = {
	"Model B+",
	DTB_DIR "bcm2835-rpi-b-plus.dtb",
	true,
	},
	[0x14] = {
	"Compute Module",
	DTB_DIR "bcm2835-rpi-cm.dtb",
	false,
	},
	[0x15] = {
	"Model A+",
	DTB_DIR "bcm2835-rpi-a-plus.dtb",
	false,
	},
	};

	static uint32_t revision;
	static uint32_t rev_scheme;
	static uint32_t rev_type;
	static const struct rpi_model *model;

	#ifdef CONFIG_ARM64
	#ifndef CONFIG_BCM2711
	static struct mm_region bcm283x_mem_map[] = {
	{
	.virt = 0x00000000UL,
	.phys = 0x00000000UL,
	.size = 0x3f000000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) \|
	PTE_BLOCK_INNER_SHARE
	}, {
	.virt = 0x3f000000UL,
	.phys = 0x3f000000UL,
	.size = 0x01000000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \|
	PTE_BLOCK_NON_SHARE \|
	PTE_BLOCK_PXN \| PTE_BLOCK_UXN
	}, {
	/* List terminator */
	0,
	}
	};
	#else
	static struct mm_region bcm283x_mem_map[] = {
	{
	.virt = 0x00000000UL,
	.phys = 0x00000000UL,
	.size = 0xfe000000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) \|
	PTE_BLOCK_INNER_SHARE
	}, {
	.virt = 0xfe000000UL,
	.phys = 0xfe000000UL,
	.size = 0x01800000UL,
	.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) \|
	PTE_BLOCK_NON_SHARE \|
	PTE_BLOCK_PXN \| PTE_BLOCK_UXN
	}, {
	/* List terminator */
	0,
	}
	};
	#endif
	struct mm_region *mem_map = bcm283x_mem_map;
	#endif

	int dram_init(void)
	{
	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
	int ret;

	BCM2835_MBOX_INIT_HDR(msg);
	BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);

	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
	if (ret) {
	printf("bcm2835: Could not query ARM memory size\n");
	return -1;
	}

	gd->ram_size = msg->get_arm_mem.body.resp.mem_size;

	return 0;
	}

	#ifdef CONFIG_OF_BOARD
	#ifdef CONFIG_BCM2711
	int dram_init_banksize(void)
	{
	return fdtdec_decode_ram_size(gd->fdt_blob, NULL, 0, NULL,
	(phys_size_t *)&gd->ram_size, gd->bd);
	}
	#endif
	#endif

	static void set_fdtfile(void)
	{
	const char *fdtfile;

	if (env_get("fdtfile"))
	return;

	fdtfile = model->fdtfile;
	env_set("fdtfile", fdtfile);
	}

	/*
	* If the firmware provided a valid FDT at boot time, let's expose it in
	* ${fdt_addr} so it may be passed unmodified to the kernel.
	*/
	static void set_fdt_addr(void)
	{
	if (env_get("fdt_addr"))
	return;

	if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
	return;

	env_set_hex("fdt_addr", fw_dtb_pointer);
	}

	/*
	* Prevent relocation from stomping on a firmware provided FDT blob.
	*/
	unsigned long board_get_usable_ram_top(unsigned long total_size)
	{
	if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
	return gd->ram_top;
	return fw_dtb_pointer & ~0xffff;
	}

	static void set_usbethaddr(void)
	{
	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
	int ret;

	if (!model->has_onboard_eth)
	return;

	if (env_get("usbethaddr"))
	return;

	BCM2835_MBOX_INIT_HDR(msg);
	BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);

	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
	if (ret) {
	printf("bcm2835: Could not query MAC address\n");
	/* Ignore error; not critical */
	return;
	}

	eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);

	if (!env_get("ethaddr"))
	env_set("ethaddr", env_get("usbethaddr"));

	return;
	}

	#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
	static void set_board_info(void)
	{
	char s[11];

	snprintf(s, sizeof(s), "0x%X", revision);
	env_set("board_revision", s);
	snprintf(s, sizeof(s), "%d", rev_scheme);
	env_set("board_rev_scheme", s);
	/* Can't rename this to board_rev_type since it's an ABI for scripts */
	snprintf(s, sizeof(s), "0x%X", rev_type);
	env_set("board_rev", s);
	env_set("board_name", model->name);
	}
	#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */

	static void set_serial_number(void)
	{
	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
	int ret;
	char serial_string[17] = { 0 };

	if (env_get("serial#"))
	return;

	BCM2835_MBOX_INIT_HDR(msg);
	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);

	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
	if (ret) {
	printf("bcm2835: Could not query board serial\n");
	/* Ignore error; not critical */
	return;
	}

	snprintf(serial_string, sizeof(serial_string), "%016llx",
	msg->get_board_serial.body.resp.serial);
	env_set("serial#", serial_string);
	}

	int misc_init_r(void)
	{
	set_fdt_addr();
	set_fdtfile();
	set_usbethaddr();
	#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
	set_board_info();
	#endif
	set_serial_number();

	return 0;
	}

	static void get_board_rev(void)
	{
	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
	int ret;
	const struct rpi_model *models;
	uint32_t models_count;

	BCM2835_MBOX_INIT_HDR(msg);
	BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);

	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
	if (ret) {
	printf("bcm2835: Could not query board revision\n");
	/* Ignore error; not critical */
	return;
	}

	/*
	* For details of old-vs-new scheme, see:
	* https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
	* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
	* (a few posts down)
	*
	* For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
	* lower byte to use as the board rev:
	* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
	* http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
	*/
	revision = msg->get_board_rev.body.resp.rev;
	if (revision & 0x800000) {
	rev_scheme = 1;
	rev_type = (revision >> 4) & 0xff;
	models = rpi_models_new_scheme;
	models_count = ARRAY_SIZE(rpi_models_new_scheme);
	} else {
	rev_scheme = 0;
	rev_type = revision & 0xff;
	models = rpi_models_old_scheme;
	models_count = ARRAY_SIZE(rpi_models_old_scheme);
	}
	if (rev_type >= models_count) {
	printf("RPI: Board rev 0x%x outside known range\n", rev_type);
	model = &rpi_model_unknown;
	} else if (!models[rev_type].name) {
	printf("RPI: Board rev 0x%x unknown\n", rev_type);
	model = &rpi_model_unknown;
	} else {
	model = &models[rev_type];
	}

	printf("RPI %s (0x%x)\n", model->name, revision);
	}

	int board_init(void)
	{
	#ifdef CONFIG_HW_WATCHDOG
	hw_watchdog_init();
	#endif

	get_board_rev();

	gd->bd->bi_boot_params = 0x100;

	return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
	}

	/*
	* If the firmware passed a device tree use it for U-Boot.
	*/
	void *board_fdt_blob_setup(void)
	{
	if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
	return NULL;
	return (void *)fw_dtb_pointer;
	}

	int ft_board_setup(void blob, bd_t bd)
	{
	/*
	* For now, we simply always add the simplefb DT node. Later, we
	* should be more intelligent, and e.g. only do this if no enabled DT
	* node exists for the "real" graphics driver.
	*/
	lcd_dt_simplefb_add_node(blob);

	#ifdef CONFIG_EFI_LOADER
	/* Reserve the spin table */
	efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
	#endif

	return 0;
	}