[J-u-boot.git] / arch / x86 / lib / zimage.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2002
 * Daniel Engström, Omicron Ceti AB, <[email protected]>
 */

/*
 * Linux x86 zImage and bzImage loading
 *
 * based on the procdure described in
 * linux/Documentation/i386/boot.txt
 */

#include <common.h>
#include <command.h>
#include <env.h>
#include <irq_func.h>
#include <malloc.h>
#include <acpi/acpi_table.h>
#include <asm/io.h>
#include <asm/ptrace.h>
#include <asm/zimage.h>
#include <asm/byteorder.h>
#include <asm/bootm.h>
#include <asm/bootparam.h>
#ifdef CONFIG_SYS_COREBOOT
#include <asm/arch/timestamp.h>
#endif
#include <linux/compiler.h>
#include <linux/libfdt.h>

/*
 * Memory lay-out:
 *
 * relative to setup_base (which is 0x90000 currently)
 *
 *	0x0000-0x7FFF	Real mode kernel
 *	0x8000-0x8FFF	Stack and heap
 *	0x9000-0x90FF	Kernel command line
 */
#define DEFAULT_SETUP_BASE	0x90000
#define COMMAND_LINE_OFFSET	0x9000
#define HEAP_END_OFFSET		0x8e00

#define COMMAND_LINE_SIZE	2048

static void build_command_line(char *command_line, int auto_boot)
{
	char *env_command_line;

	command_line[0] = '\0';

	env_command_line =  env_get("bootargs");

	/* set console= argument if we use a serial console */
	if (!strstr(env_command_line, "console=")) {
		if (!strcmp(env_get("stdout"), "serial")) {

			/* We seem to use serial console */
			sprintf(command_line, "console=ttyS0,%s ",
				env_get("baudrate"));
		}
	}

	if (auto_boot)
		strcat(command_line, "auto ");

	if (env_command_line)
		strcat(command_line, env_command_line);

	printf("Kernel command line: \"%s\"\n", command_line);
}

static int kernel_magic_ok(struct setup_header *hdr)
{
	if (KERNEL_MAGIC != hdr->boot_flag) {
		printf("Error: Invalid Boot Flag "
			"(found 0x%04x, expected 0x%04x)\n",
			hdr->boot_flag, KERNEL_MAGIC);
		return 0;
	} else {
		printf("Valid Boot Flag\n");
		return 1;
	}
}

static int get_boot_protocol(struct setup_header *hdr)
{
	if (hdr->header == KERNEL_V2_MAGIC) {
		printf("Magic signature found\n");
		return hdr->version;
	} else {
		/* Very old kernel */
		printf("Magic signature not found\n");
		return 0x0100;
	}
}

static int setup_device_tree(struct setup_header *hdr, const void *fdt_blob)
{
	int bootproto = get_boot_protocol(hdr);
	struct setup_data *sd;
	int size;

	if (bootproto < 0x0209)
		return -ENOTSUPP;

	if (!fdt_blob)
		return 0;

	size = fdt_totalsize(fdt_blob);
	if (size < 0)
		return -EINVAL;

	size += sizeof(struct setup_data);
	sd = (struct setup_data *)malloc(size);
	if (!sd) {
		printf("Not enough memory for DTB setup data\n");
		return -ENOMEM;
	}

	sd->next = hdr->setup_data;
	sd->type = SETUP_DTB;
	sd->len = fdt_totalsize(fdt_blob);
	memcpy(sd->data, fdt_blob, sd->len);
	hdr->setup_data = (unsigned long)sd;

	return 0;
}

struct boot_params *load_zimage(char *image, unsigned long kernel_size,
				ulong *load_addressp)
{
	struct boot_params *setup_base;
	int setup_size;
	int bootproto;
	int big_image;

	struct boot_params *params = (struct boot_params *)image;
	struct setup_header *hdr = &params->hdr;

	/* base address for real-mode segment */
	setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;

	if (!kernel_magic_ok(hdr))
		return 0;

	/* determine size of setup */
	if (0 == hdr->setup_sects) {
		printf("Setup Sectors = 0 (defaulting to 4)\n");
		setup_size = 5 * 512;
	} else {
		setup_size = (hdr->setup_sects + 1) * 512;
	}

	printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size);

	if (setup_size > SETUP_MAX_SIZE)
		printf("Error: Setup is too large (%d bytes)\n", setup_size);

	/* determine boot protocol version */
	bootproto = get_boot_protocol(hdr);

	printf("Using boot protocol version %x.%02x\n",
	       (bootproto & 0xff00) >> 8, bootproto & 0xff);

	if (bootproto >= 0x0200) {
		if (hdr->setup_sects >= 15) {
			printf("Linux kernel version %s\n",
				(char *)params +
				hdr->kernel_version + 0x200);
		} else {
			printf("Setup Sectors < 15 - "
				"Cannot print kernel version.\n");
		}
	}

	/* Determine image type */
	big_image = (bootproto >= 0x0200) &&
		    (hdr->loadflags & BIG_KERNEL_FLAG);

	/* Determine load address */
	if (big_image)
		*load_addressp = BZIMAGE_LOAD_ADDR;
	else
		*load_addressp = ZIMAGE_LOAD_ADDR;

	printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
	memset(setup_base, 0, sizeof(*setup_base));
	setup_base->hdr = params->hdr;

	if (bootproto >= 0x0204)
		kernel_size = hdr->syssize * 16;
	else
		kernel_size -= setup_size;

	if (bootproto == 0x0100) {
		/*
		 * A very old kernel MUST have its real-mode code
		 * loaded at 0x90000
		 */
		if ((ulong)setup_base != 0x90000) {
			/* Copy the real-mode kernel */
			memmove((void *)0x90000, setup_base, setup_size);

			/* Copy the command line */
			memmove((void *)0x99000,
				(u8 *)setup_base + COMMAND_LINE_OFFSET,
				COMMAND_LINE_SIZE);

			 /* Relocated */
			setup_base = (struct boot_params *)0x90000;
		}

		/* It is recommended to clear memory up to the 32K mark */
		memset((u8 *)0x90000 + setup_size, 0,
		       SETUP_MAX_SIZE - setup_size);
	}

	if (big_image) {
		if (kernel_size > BZIMAGE_MAX_SIZE) {
			printf("Error: bzImage kernel too big! "
				"(size: %ld, max: %d)\n",
				kernel_size, BZIMAGE_MAX_SIZE);
			return 0;
		}
	} else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
		printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
		       kernel_size, ZIMAGE_MAX_SIZE);
		return 0;
	}

	printf("Loading %s at address %lx (%ld bytes)\n",
	       big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);

	memmove((void *)*load_addressp, image + setup_size, kernel_size);

	return setup_base;
}

int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
		 unsigned long initrd_addr, unsigned long initrd_size)
{
	struct setup_header *hdr = &setup_base->hdr;
	int bootproto = get_boot_protocol(hdr);

	setup_base->e820_entries = install_e820_map(
		ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);

	if (bootproto == 0x0100) {
		setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
		setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
	}
	if (bootproto >= 0x0200) {
		hdr->type_of_loader = 8;

		if (initrd_addr) {
			printf("Initial RAM disk at linear address "
			       "0x%08lx, size %ld bytes\n",
			       initrd_addr, initrd_size);

			hdr->ramdisk_image = initrd_addr;
			hdr->ramdisk_size = initrd_size;
		}
	}

	if (bootproto >= 0x0201) {
		hdr->heap_end_ptr = HEAP_END_OFFSET;
		hdr->loadflags |= HEAP_FLAG;
	}

	if (cmd_line) {
		if (bootproto >= 0x0202) {
			hdr->cmd_line_ptr = (uintptr_t)cmd_line;
		} else if (bootproto >= 0x0200) {
			setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
			setup_base->screen_info.cl_offset =
				(uintptr_t)cmd_line - (uintptr_t)setup_base;

			hdr->setup_move_size = 0x9100;
		}

		/* build command line at COMMAND_LINE_OFFSET */
		build_command_line(cmd_line, auto_boot);
	}

#ifdef CONFIG_INTEL_MID
	if (bootproto >= 0x0207)
		hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
#endif

#ifdef CONFIG_GENERATE_ACPI_TABLE
	setup_base->acpi_rsdp_addr = acpi_get_rsdp_addr();
#endif

	setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
	setup_video(&setup_base->screen_info);

#ifdef CONFIG_EFI_STUB
	setup_efi_info(&setup_base->efi_info);
#endif

	return 0;
}

void setup_pcat_compatibility(void)
	__attribute__((weak, alias("__setup_pcat_compatibility")));

void __setup_pcat_compatibility(void)
{
}

int do_zboot(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
	struct boot_params *base_ptr;
	void *bzImage_addr = NULL;
	ulong load_address;
	char *s;
	ulong bzImage_size = 0;
	ulong initrd_addr = 0;
	ulong initrd_size = 0;

	disable_interrupts();

	/* Setup board for maximum PC/AT Compatibility */
	setup_pcat_compatibility();

	if (argc >= 2) {
		/* argv[1] holds the address of the bzImage */
		s = argv[1];
	} else {
		s = env_get("fileaddr");
	}

	if (s)
		bzImage_addr = (void *)simple_strtoul(s, NULL, 16);

	if (argc >= 3) {
		/* argv[2] holds the size of the bzImage */
		bzImage_size = simple_strtoul(argv[2], NULL, 16);
	}

	if (argc >= 4)
		initrd_addr = simple_strtoul(argv[3], NULL, 16);
	if (argc >= 5)
		initrd_size = simple_strtoul(argv[4], NULL, 16);

	/* Lets look for */
	base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address);

	if (!base_ptr) {
		puts("## Kernel loading failed ...\n");
		return -1;
	}
	if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
			0, initrd_addr, initrd_size)) {
		puts("Setting up boot parameters failed ...\n");
		return -1;
	}

	/* we assume that the kernel is in place */
	return boot_linux_kernel((ulong)base_ptr, load_address, false);
}

U_BOOT_CMD(
	zboot, 5, 0,	do_zboot,
	"Boot bzImage",
	"[addr] [size] [initrd addr] [initrd size]\n"
	"      addr -        The optional starting address of the bzimage.\n"
	"                    If not set it defaults to the environment\n"
	"                    variable \"fileaddr\".\n"
	"      size -        The optional size of the bzimage. Defaults to\n"
	"                    zero.\n"
	"      initrd addr - The address of the initrd image to use, if any.\n"
	"      initrd size - The size of the initrd image to use, if any.\n"
);
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
2262cfee	2	/*
d3a2bc3f	3	* Copyright (c) 2011 The Chromium OS Authors.
2262cfee	4	* (C) Copyright 2002
fa82f871	5	* Daniel Engström, Omicron Ceti AB, <[email protected]>
2262cfee WD	6	*/
2262cfee WD	7
8bde7f77	8	/*
dbf7115a	9	* Linux x86 zImage and bzImage loading
8bde7f77 WD	10	*
8bde7f77 WD	11	* based on the procdure described in
2262cfee WD	12	* linux/Documentation/i386/boot.txt
	13	*/
	14
	15	#include <common.h>
09140113	16	#include <command.h>
cdbff9fc	17	#include <env.h>
36bf446b	18	#include <irq_func.h>
5d73292c	19	#include <malloc.h>
776cc201	20	#include <acpi/acpi_table.h>
2262cfee WD	21	#include <asm/io.h>
	22	#include <asm/ptrace.h>
	23	#include <asm/zimage.h>
2262cfee	24	#include <asm/byteorder.h>
0d0ba59c	25	#include <asm/bootm.h>
95ffaba3	26	#include <asm/bootparam.h>
3cdc18a8 VB	27	#ifdef CONFIG_SYS_COREBOOT
	28	#include <asm/arch/timestamp.h>
	29	#endif
61e0ea90	30	#include <linux/compiler.h>
5d73292c	31	#include <linux/libfdt.h>
2262cfee WD	32
	33	/*
	34	* Memory lay-out:
8bde7f77	35	*
2262cfee	36	* relative to setup_base (which is 0x90000 currently)
8bde7f77 WD	37	*
8bde7f77 WD	38	* 0x0000-0x7FFF Real mode kernel
2262cfee WD	39	* 0x8000-0x8FFF Stack and heap
	40	* 0x9000-0x90FF Kernel command line
	41	*/
83088afb GR	42	#define DEFAULT_SETUP_BASE 0x90000
	43	#define COMMAND_LINE_OFFSET 0x9000
	44	#define HEAP_END_OFFSET 0x8e00
2262cfee	45
83088afb	46	#define COMMAND_LINE_SIZE 2048
2262cfee WD	47
	48	static void build_command_line(char *command_line, int auto_boot)
	49	{
	50	char *env_command_line;
8bde7f77	51
2262cfee	52	command_line[0] = '\0';
8bde7f77	53
00caae6d	54	env_command_line = env_get("bootargs");
8bde7f77	55
2262cfee	56	/* set console= argument if we use a serial console */
83088afb	57	if (!strstr(env_command_line, "console=")) {
00caae6d	58	if (!strcmp(env_get("stdout"), "serial")) {
8bde7f77	59
2262cfee	60	/* We seem to use serial console */
8bde7f77	61	sprintf(command_line, "console=ttyS0,%s ",
00caae6d	62	env_get("baudrate"));
2262cfee WD	63	}
2262cfee WD	64	}
8bde7f77	65
83088afb	66	if (auto_boot)
2262cfee	67	strcat(command_line, "auto ");
8bde7f77	68
83088afb	69	if (env_command_line)
2262cfee	70	strcat(command_line, env_command_line);
8bde7f77	71
2262cfee WD	72	printf("Kernel command line: \"%s\"\n", command_line);
	73	}
	74
69370d14	75	static int kernel_magic_ok(struct setup_header *hdr)
2262cfee	76	{
95ffaba3	77	if (KERNEL_MAGIC != hdr->boot_flag) {
d3a2bc3f GB	78	printf("Error: Invalid Boot Flag "
	79	"(found 0x%04x, expected 0x%04x)\n",
	80	hdr->boot_flag, KERNEL_MAGIC);
2262cfee	81	return 0;
95ffaba3 GR	82	} else {
95ffaba3 GR	83	printf("Valid Boot Flag\n");
69370d14	84	return 1;
2262cfee	85	}
69370d14	86	}
8bde7f77	87
69370d14 GB	88	static int get_boot_protocol(struct setup_header *hdr)
	89	{
	90	if (hdr->header == KERNEL_V2_MAGIC) {
95ffaba3	91	printf("Magic signature found\n");
69370d14	92	return hdr->version;
2262cfee WD	93	} else {
2262cfee WD	94	/* Very old kernel */
95ffaba3	95	printf("Magic signature not found\n");
69370d14	96	return 0x0100;
2262cfee	97	}
69370d14 GB	98	}
69370d14 GB	99
5d73292c IG	100	static int setup_device_tree(struct setup_header hdr, const void fdt_blob)
	101	{
	102	int bootproto = get_boot_protocol(hdr);
	103	struct setup_data *sd;
	104	int size;
	105
	106	if (bootproto < 0x0209)
	107	return -ENOTSUPP;
	108
	109	if (!fdt_blob)
	110	return 0;
	111
	112	size = fdt_totalsize(fdt_blob);
	113	if (size < 0)
	114	return -EINVAL;
	115
	116	size += sizeof(struct setup_data);
	117	sd = (struct setup_data *)malloc(size);
	118	if (!sd) {
	119	printf("Not enough memory for DTB setup data\n");
	120	return -ENOMEM;
	121	}
	122
	123	sd->next = hdr->setup_data;
	124	sd->type = SETUP_DTB;
	125	sd->len = fdt_totalsize(fdt_blob);
	126	memcpy(sd->data, fdt_blob, sd->len);
	127	hdr->setup_data = (unsigned long)sd;
	128
	129	return 0;
	130	}
	131
69370d14	132	struct boot_params load_zimage(char image, unsigned long kernel_size,
76539383	133	ulong *load_addressp)
69370d14 GB	134	{
	135	struct boot_params *setup_base;
	136	int setup_size;
	137	int bootproto;
	138	int big_image;
	139
	140	struct boot_params params = (struct boot_params )image;
	141	struct setup_header *hdr = &params->hdr;
	142
	143	/* base address for real-mode segment */
	144	setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;
	145
	146	if (!kernel_magic_ok(hdr))
	147	return 0;
8bde7f77	148
2262cfee	149	/* determine size of setup */
95ffaba3 GR	150	if (0 == hdr->setup_sects) {
95ffaba3 GR	151	printf("Setup Sectors = 0 (defaulting to 4)\n");
2262cfee WD	152	setup_size = 5 * 512;
2262cfee WD	153	} else {
95ffaba3	154	setup_size = (hdr->setup_sects + 1) * 512;
2262cfee	155	}
8bde7f77	156
95ffaba3 GR	157	printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
95ffaba3 GR	158
83088afb	159	if (setup_size > SETUP_MAX_SIZE)
2262cfee	160	printf("Error: Setup is too large (%d bytes)\n", setup_size);
8bde7f77	161
69370d14 GB	162	/* determine boot protocol version */
	163	bootproto = get_boot_protocol(hdr);
	164
	165	printf("Using boot protocol version %x.%02x\n",
	166	(bootproto & 0xff00) >> 8, bootproto & 0xff);
	167
	168	if (bootproto >= 0x0200) {
	169	if (hdr->setup_sects >= 15) {
	170	printf("Linux kernel version %s\n",
	171	(char *)params +
	172	hdr->kernel_version + 0x200);
	173	} else {
	174	printf("Setup Sectors < 15 - "
	175	"Cannot print kernel version.\n");
	176	}
	177	}
	178
2262cfee	179	/* Determine image type */
83088afb GR	180	big_image = (bootproto >= 0x0200) &&
83088afb GR	181	(hdr->loadflags & BIG_KERNEL_FLAG);
8bde7f77	182
95ffaba3	183	/* Determine load address */
d3a2bc3f	184	if (big_image)
76539383	185	*load_addressp = BZIMAGE_LOAD_ADDR;
d3a2bc3f	186	else
76539383	187	*load_addressp = ZIMAGE_LOAD_ADDR;
8bde7f77	188
233dbc11 GB	189	printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
	190	memset(setup_base, 0, sizeof(*setup_base));
	191	setup_base->hdr = params->hdr;
8bde7f77	192
69370d14 GB	193	if (bootproto >= 0x0204)
	194	kernel_size = hdr->syssize * 16;
	195	else
	196	kernel_size -= setup_size;
8bde7f77	197
8bde7f77	198	if (bootproto == 0x0100) {
83088afb GR	199	/*
	200	* A very old kernel MUST have its real-mode code
	201	* loaded at 0x90000
	202	*/
42fd8c19	203	if ((ulong)setup_base != 0x90000) {
2262cfee	204	/* Copy the real-mode kernel */
83088afb GR	205	memmove((void *)0x90000, setup_base, setup_size);
83088afb GR	206
2262cfee	207	/* Copy the command line */
83088afb	208	memmove((void *)0x99000,
d3a2bc3f	209	(u8 *)setup_base + COMMAND_LINE_OFFSET,
83088afb	210	COMMAND_LINE_SIZE);
8bde7f77	211
83088afb	212	/* Relocated */
d3a2bc3f	213	setup_base = (struct boot_params *)0x90000;
2262cfee	214	}
8bde7f77	215
2262cfee	216	/* It is recommended to clear memory up to the 32K mark */
d3a2bc3f GB	217	memset((u8 *)0x90000 + setup_size, 0,
d3a2bc3f GB	218	SETUP_MAX_SIZE - setup_size);
2262cfee	219	}
8bde7f77	220
69370d14 GB	221	if (big_image) {
	222	if (kernel_size > BZIMAGE_MAX_SIZE) {
	223	printf("Error: bzImage kernel too big! "
	224	"(size: %ld, max: %d)\n",
	225	kernel_size, BZIMAGE_MAX_SIZE);
	226	return 0;
	227	}
	228	} else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
	229	printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
	230	kernel_size, ZIMAGE_MAX_SIZE);
	231	return 0;
	232	}
	233
76539383 SG	234	printf("Loading %s at address %lx (%ld bytes)\n",
76539383 SG	235	big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);
69370d14	236
76539383	237	memmove((void )load_addressp, image + setup_size, kernel_size);
69370d14 GB	238
	239	return setup_base;
	240	}
	241
	242	int setup_zimage(struct boot_params setup_base, char cmd_line, int auto_boot,
	243	unsigned long initrd_addr, unsigned long initrd_size)
	244	{
	245	struct setup_header *hdr = &setup_base->hdr;
	246	int bootproto = get_boot_protocol(hdr);
	247
69370d14 GB	248	setup_base->e820_entries = install_e820_map(
69370d14 GB	249	ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
95ffaba3	250
69370d14 GB	251	if (bootproto == 0x0100) {
	252	setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
	253	setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
	254	}
2262cfee	255	if (bootproto >= 0x0200) {
95ffaba3 GR	256	hdr->type_of_loader = 8;
95ffaba3 GR	257
2262cfee	258	if (initrd_addr) {
d3a2bc3f GB	259	printf("Initial RAM disk at linear address "
d3a2bc3f GB	260	"0x%08lx, size %ld bytes\n",
2262cfee	261	initrd_addr, initrd_size);
8bde7f77	262
95ffaba3 GR	263	hdr->ramdisk_image = initrd_addr;
95ffaba3 GR	264	hdr->ramdisk_size = initrd_size;
2262cfee WD	265	}
2262cfee WD	266	}
8bde7f77	267
2262cfee	268	if (bootproto >= 0x0201) {
95ffaba3 GR	269	hdr->heap_end_ptr = HEAP_END_OFFSET;
95ffaba3 GR	270	hdr->loadflags \|= HEAP_FLAG;
2262cfee	271	}
8bde7f77	272
97d1e0c8 SG	273	if (cmd_line) {
	274	if (bootproto >= 0x0202) {
	275	hdr->cmd_line_ptr = (uintptr_t)cmd_line;
	276	} else if (bootproto >= 0x0200) {
	277	setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
	278	setup_base->screen_info.cl_offset =
	279	(uintptr_t)cmd_line - (uintptr_t)setup_base;
	280
	281	hdr->setup_move_size = 0x9100;
	282	}
95ffaba3	283
97d1e0c8 SG	284	/* build command line at COMMAND_LINE_OFFSET */
97d1e0c8 SG	285	build_command_line(cmd_line, auto_boot);
2262cfee	286	}
2262cfee	287
378960d8 AS	288	#ifdef CONFIG_INTEL_MID
	289	if (bootproto >= 0x0207)
	290	hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
	291	#endif
	292
d905aa8a AS	293	#ifdef CONFIG_GENERATE_ACPI_TABLE
	294	setup_base->acpi_rsdp_addr = acpi_get_rsdp_addr();
	295	#endif
	296
5d73292c	297	setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
a4520022 BM	298	setup_video(&setup_base->screen_info);
a4520022 BM	299
1fdeacd3 BM	300	#ifdef CONFIG_EFI_STUB
	301	setup_efi_info(&setup_base->efi_info);
	302	#endif
	303
69370d14	304	return 0;
2262cfee WD	305	}
2262cfee WD	306
8e18e6e1 GR	307	void setup_pcat_compatibility(void)
	308	__attribute__((weak, alias("__setup_pcat_compatibility")));
	309
	310	void __setup_pcat_compatibility(void)
	311	{
	312	}
	313
09140113	314	int do_zboot(struct cmd_tbl cmdtp, int flag, int argc, char const argv[])
95ffaba3	315	{
69370d14	316	struct boot_params *base_ptr;
abe98f49	317	void *bzImage_addr = NULL;
76539383	318	ulong load_address;
abe98f49	319	char *s;
95ffaba3	320	ulong bzImage_size = 0;
6f9d9986 GB	321	ulong initrd_addr = 0;
6f9d9986 GB	322	ulong initrd_size = 0;
95ffaba3 GR	323
	324	disable_interrupts();
	325
	326	/* Setup board for maximum PC/AT Compatibility */
	327	setup_pcat_compatibility();
	328
d3a2bc3f	329	if (argc >= 2) {
abe98f49 GR	330	/* argv[1] holds the address of the bzImage */
abe98f49 GR	331	s = argv[1];
d3a2bc3f	332	} else {
00caae6d	333	s = env_get("fileaddr");
d3a2bc3f	334	}
abe98f49 GR	335
	336	if (s)
	337	bzImage_addr = (void *)simple_strtoul(s, NULL, 16);
95ffaba3	338
6f9d9986	339	if (argc >= 3) {
abe98f49	340	/* argv[2] holds the size of the bzImage */
95ffaba3	341	bzImage_size = simple_strtoul(argv[2], NULL, 16);
6f9d9986 GB	342	}
	343
	344	if (argc >= 4)
	345	initrd_addr = simple_strtoul(argv[3], NULL, 16);
	346	if (argc >= 5)
	347	initrd_size = simple_strtoul(argv[4], NULL, 16);
95ffaba3	348
d3a2bc3f	349	/* Lets look for */
69370d14	350	base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address);
95ffaba3	351
83088afb	352	if (!base_ptr) {
2c363cb0	353	puts("## Kernel loading failed ...\n");
69370d14	354	return -1;
95ffaba3	355	}
69370d14	356	if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
6f9d9986	357	0, initrd_addr, initrd_size)) {
2c363cb0	358	puts("Setting up boot parameters failed ...\n");
69370d14 GB	359	return -1;
	360	}
	361
69370d14	362	/* we assume that the kernel is in place */
76539383	363	return boot_linux_kernel((ulong)base_ptr, load_address, false);
95ffaba3 GR	364	}
	365
	366	U_BOOT_CMD(
6f9d9986	367	zboot, 5, 0, do_zboot,
95ffaba3	368	"Boot bzImage",
6f9d9986 GB	369	"[addr] [size] [initrd addr] [initrd size]\n"
	370	" addr - The optional starting address of the bzimage.\n"
	371	" If not set it defaults to the environment\n"
	372	" variable \"fileaddr\".\n"
	373	" size - The optional size of the bzimage. Defaults to\n"
	374	" zero.\n"
	375	" initrd addr - The address of the initrd image to use, if any.\n"
	376	" initrd size - The size of the initrd image to use, if any.\n"
95ffaba3	377	);