[thirdparty/u-boot.git] / arch / arm / lib / bootm.c

// SPDX-License-Identifier: GPL-2.0+
/* Copyright (C) 2011
 * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
 *  - Added prep subcommand support
 *  - Reorganized source - modeled after powerpc version
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 *
 * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
 */

#include <common.h>
#include <bootstage.h>
#include <command.h>
#include <cpu_func.h>
#include <dm.h>
#include <hang.h>
#include <lmb.h>
#include <dm/root.h>
#include <env.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <asm/byteorder.h>
#include <linux/libfdt.h>
#include <mapmem.h>
#include <fdt_support.h>
#include <asm/bootm.h>
#include <asm/secure.h>
#include <linux/compiler.h>
#include <bootm.h>
#include <vxworks.h>
#include <asm/cache.h>

#ifdef CONFIG_ARMV7_NONSEC
#include <asm/armv7.h>
#endif
#include <asm/setup.h>

DECLARE_GLOBAL_DATA_PTR;

static struct tag *params;

static ulong get_sp(void)
{
	ulong ret;

	asm("mov %0, sp" : "=r"(ret) : );
	return ret;
}

void arch_lmb_reserve(struct lmb *lmb)
{
	ulong sp, bank_end;
	int bank;

	/*
	 * Booting a (Linux) kernel image
	 *
	 * Allocate space for command line and board info - the
	 * address should be as high as possible within the reach of
	 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
	 * memory, which means far enough below the current stack
	 * pointer.
	 */
	sp = get_sp();
	debug("## Current stack ends at 0x%08lx ", sp);

	/* adjust sp by 4K to be safe */
	sp -= 4096;
	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
		if (!gd->bd->bi_dram[bank].size ||
		    sp < gd->bd->bi_dram[bank].start)
			continue;
		/* Watch out for RAM at end of address space! */
		bank_end = gd->bd->bi_dram[bank].start +
			gd->bd->bi_dram[bank].size - 1;
		if (sp > bank_end)
			continue;
		if (bank_end > gd->ram_top)
			bank_end = gd->ram_top - 1;

		lmb_reserve(lmb, sp, bank_end - sp + 1);
		break;
	}
}

__weak void board_quiesce_devices(void)
{
}

/**
 * announce_and_cleanup() - Print message and prepare for kernel boot
 *
 * @fake: non-zero to do everything except actually boot
 */
static void announce_and_cleanup(int fake)
{
	bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
#ifdef CONFIG_BOOTSTAGE_FDT
	bootstage_fdt_add_report();
#endif
#ifdef CONFIG_BOOTSTAGE_REPORT
	bootstage_report();
#endif

#ifdef CONFIG_USB_DEVICE
	udc_disconnect();
#endif

	board_quiesce_devices();

	printf("\nStarting kernel ...%s\n\n", fake ?
		"(fake run for tracing)" : "");
	/*
	 * Call remove function of all devices with a removal flag set.
	 * This may be useful for last-stage operations, like cancelling
	 * of DMA operation or releasing device internal buffers.
	 */
	dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);

	cleanup_before_linux();
}

static void setup_start_tag (bd_t *bd)
{
	params = (struct tag *)bd->bi_boot_params;

	params->hdr.tag = ATAG_CORE;
	params->hdr.size = tag_size (tag_core);

	params->u.core.flags = 0;
	params->u.core.pagesize = 0;
	params->u.core.rootdev = 0;

	params = tag_next (params);
}

static void setup_memory_tags(bd_t *bd)
{
	int i;

	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
		params->hdr.tag = ATAG_MEM;
		params->hdr.size = tag_size (tag_mem32);

		params->u.mem.start = bd->bi_dram[i].start;
		params->u.mem.size = bd->bi_dram[i].size;

		params = tag_next (params);
	}
}

static void setup_commandline_tag(bd_t *bd, char *commandline)
{
	char *p;

	if (!commandline)
		return;

	/* eat leading white space */
	for (p = commandline; *p == ' '; p++);

	/* skip non-existent command lines so the kernel will still
	 * use its default command line.
	 */
	if (*p == '\0')
		return;

	params->hdr.tag = ATAG_CMDLINE;
	params->hdr.size =
		(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;

	strcpy (params->u.cmdline.cmdline, p);

	params = tag_next (params);
}

static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
{
	/* an ATAG_INITRD node tells the kernel where the compressed
	 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
	 */
	params->hdr.tag = ATAG_INITRD2;
	params->hdr.size = tag_size (tag_initrd);

	params->u.initrd.start = initrd_start;
	params->u.initrd.size = initrd_end - initrd_start;

	params = tag_next (params);
}

static void setup_serial_tag(struct tag **tmp)
{
	struct tag *params = *tmp;
	struct tag_serialnr serialnr;

	get_board_serial(&serialnr);
	params->hdr.tag = ATAG_SERIAL;
	params->hdr.size = tag_size (tag_serialnr);
	params->u.serialnr.low = serialnr.low;
	params->u.serialnr.high= serialnr.high;
	params = tag_next (params);
	*tmp = params;
}

static void setup_revision_tag(struct tag **in_params)
{
	u32 rev = 0;

	rev = get_board_rev();
	params->hdr.tag = ATAG_REVISION;
	params->hdr.size = tag_size (tag_revision);
	params->u.revision.rev = rev;
	params = tag_next (params);
}

static void setup_end_tag(bd_t *bd)
{
	params->hdr.tag = ATAG_NONE;
	params->hdr.size = 0;
}

__weak void setup_board_tags(struct tag **in_params) {}

#ifdef CONFIG_ARM64
static void do_nonsec_virt_switch(void)
{
	smp_kick_all_cpus();
	dcache_disable();	/* flush cache before swtiching to EL2 */
}
#endif

__weak void board_prep_linux(bootm_headers_t *images) { }

/* Subcommand: PREP */
static void boot_prep_linux(bootm_headers_t *images)
{
	char *commandline = env_get("bootargs");

	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
#ifdef CONFIG_OF_LIBFDT
		debug("using: FDT\n");
		if (image_setup_linux(images)) {
			printf("FDT creation failed! hanging...");
			hang();
		}
#endif
	} else if (BOOTM_ENABLE_TAGS) {
		debug("using: ATAGS\n");
		setup_start_tag(gd->bd);
		if (BOOTM_ENABLE_SERIAL_TAG)
			setup_serial_tag(&params);
		if (BOOTM_ENABLE_CMDLINE_TAG)
			setup_commandline_tag(gd->bd, commandline);
		if (BOOTM_ENABLE_REVISION_TAG)
			setup_revision_tag(&params);
		if (BOOTM_ENABLE_MEMORY_TAGS)
			setup_memory_tags(gd->bd);
		if (BOOTM_ENABLE_INITRD_TAG) {
			/*
			 * In boot_ramdisk_high(), it may relocate ramdisk to
			 * a specified location. And set images->initrd_start &
			 * images->initrd_end to relocated ramdisk's start/end
			 * addresses. So use them instead of images->rd_start &
			 * images->rd_end when possible.
			 */
			if (images->initrd_start && images->initrd_end) {
				setup_initrd_tag(gd->bd, images->initrd_start,
						 images->initrd_end);
			} else if (images->rd_start && images->rd_end) {
				setup_initrd_tag(gd->bd, images->rd_start,
						 images->rd_end);
			}
		}
		setup_board_tags(&params);
		setup_end_tag(gd->bd);
	} else {
		printf("FDT and ATAGS support not compiled in - hanging\n");
		hang();
	}

	board_prep_linux(images);
}

__weak bool armv7_boot_nonsec_default(void)
{
#ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
	return false;
#else
	return true;
#endif
}

#ifdef CONFIG_ARMV7_NONSEC
bool armv7_boot_nonsec(void)
{
	char *s = env_get("bootm_boot_mode");
	bool nonsec = armv7_boot_nonsec_default();

	if (s && !strcmp(s, "sec"))
		nonsec = false;

	if (s && !strcmp(s, "nonsec"))
		nonsec = true;

	return nonsec;
}
#endif

#ifdef CONFIG_ARM64
__weak void update_os_arch_secondary_cores(uint8_t os_arch)
{
}

#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
static void switch_to_el1(void)
{
	if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
	    (images.os.arch == IH_ARCH_ARM))
		armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number,
				    (u64)images.ft_addr, 0,
				    (u64)images.ep,
				    ES_TO_AARCH32);
	else
		armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0,
				    images.ep,
				    ES_TO_AARCH64);
}
#endif
#endif

/* Subcommand: GO */
static void boot_jump_linux(bootm_headers_t *images, int flag)
{
#ifdef CONFIG_ARM64
	void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
			void *res2);
	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);

	kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
				void *res2))images->ep;

	debug("## Transferring control to Linux (at address %lx)...\n",
		(ulong) kernel_entry);
	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	announce_and_cleanup(fake);

	if (!fake) {
#ifdef CONFIG_ARMV8_PSCI
		armv8_setup_psci();
#endif
		do_nonsec_virt_switch();

		update_os_arch_secondary_cores(images->os.arch);

#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
		armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
				    (u64)switch_to_el1, ES_TO_AARCH64);
#else
		if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
		    (images->os.arch == IH_ARCH_ARM))
			armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number,
					    (u64)images->ft_addr, 0,
					    (u64)images->ep,
					    ES_TO_AARCH32);
		else
			armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
					    images->ep,
					    ES_TO_AARCH64);
#endif
	}
#else
	unsigned long machid = gd->bd->bi_arch_number;
	char *s;
	void (*kernel_entry)(int zero, int arch, uint params);
	unsigned long r2;
	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);

	kernel_entry = (void (*)(int, int, uint))images->ep;
#ifdef CONFIG_CPU_V7M
	ulong addr = (ulong)kernel_entry | 1;
	kernel_entry = (void *)addr;
#endif
	s = env_get("machid");
	if (s) {
		if (strict_strtoul(s, 16, &machid) < 0) {
			debug("strict_strtoul failed!\n");
			return;
		}
		printf("Using machid 0x%lx from environment\n", machid);
	}

	debug("## Transferring control to Linux (at address %08lx)" \
		"...\n", (ulong) kernel_entry);
	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
	announce_and_cleanup(fake);

	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
		r2 = (unsigned long)images->ft_addr;
	else
		r2 = gd->bd->bi_boot_params;

	if (!fake) {
#ifdef CONFIG_ARMV7_NONSEC
		if (armv7_boot_nonsec()) {
			armv7_init_nonsec();
			secure_ram_addr(_do_nonsec_entry)(kernel_entry,
							  0, machid, r2);
		} else
#endif
			kernel_entry(0, machid, r2);
	}
#endif
}

/* Main Entry point for arm bootm implementation
 *
 * Modeled after the powerpc implementation
 * DIFFERENCE: Instead of calling prep and go at the end
 * they are called if subcommand is equal 0.
 */
int do_bootm_linux(int flag, int argc, char * const argv[],
		   bootm_headers_t *images)
{
	/* No need for those on ARM */
	if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
		return -1;

	if (flag & BOOTM_STATE_OS_PREP) {
		boot_prep_linux(images);
		return 0;
	}

	if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
		boot_jump_linux(images, flag);
		return 0;
	}

	boot_prep_linux(images);
	boot_jump_linux(images, flag);
	return 0;
}

#if defined(CONFIG_BOOTM_VXWORKS)
void boot_prep_vxworks(bootm_headers_t *images)
{
#if defined(CONFIG_OF_LIBFDT)
	int off;

	if (images->ft_addr) {
		off = fdt_path_offset(images->ft_addr, "/memory");
		if (off > 0) {
			if (arch_fixup_fdt(images->ft_addr))
				puts("## WARNING: fixup memory failed!\n");
		}
	}
#endif
	cleanup_before_linux();
}
void boot_jump_vxworks(bootm_headers_t *images)
{
#if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
	armv8_setup_psci();
	smp_kick_all_cpus();
#endif

	/* ARM VxWorks requires device tree physical address to be passed */
	((void (*)(void *))images->ep)(images->ft_addr);
}
#endif
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
0a672d49 SS	2	/* Copyright (C) 2011
	3	* Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
	4	* - Added prep subcommand support
	5	* - Reorganized source - modeled after powerpc version
	6	*
c609719b WD	7	* (C) Copyright 2002
	8	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	9	* Marius Groeger <mgroeger@sysgo.de>
	10	*
	11	* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
c609719b WD	12	*/
	13
	14	#include <common.h>
52f24238	15	#include <bootstage.h>
c609719b	16	#include <command.h>
62270f43	17	#include <cpu_func.h>
9d922450	18	#include <dm.h>
db41d65a	19	#include <hang.h>
4d72caa5	20	#include <lmb.h>
1b8220aa	21	#include <dm/root.h>
7b51b576	22	#include <env.h>
c609719b	23	#include <image.h>
a31e091a	24	#include <u-boot/zlib.h>
c609719b	25	#include <asm/byteorder.h>
b08c8c48	26	#include <linux/libfdt.h>
0eb25b61	27	#include <mapmem.h>
2d1916e4	28	#include <fdt_support.h>
0a672d49	29	#include <asm/bootm.h>
f510aeae	30	#include <asm/secure.h>
89e6f138	31	#include <linux/compiler.h>
8d196e52 EN	32	#include <bootm.h>
8d196e52 EN	33	#include <vxworks.h>
90526e9f	34	#include <asm/cache.h>
c609719b	35
104d6fb6	36	#ifdef CONFIG_ARMV7_NONSEC
bb975455 AP	37	#include <asm/armv7.h>
bb975455 AP	38	#endif
c45300b0	39	#include <asm/setup.h>
bb975455	40
d87080b7 WD	41	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	42
c609719b	43	static struct tag *params;
2d1916e4	44
0a672d49 SS	45	static ulong get_sp(void)
	46	{
	47	ulong ret;
	48
	49	asm("mov %0, sp" : "=r"(ret) : );
	50	return ret;
	51	}
	52
2d1916e4 JR	53	void arch_lmb_reserve(struct lmb *lmb)
2d1916e4 JR	54	{
15751403 SW	55	ulong sp, bank_end;
15751403 SW	56	int bank;
2d1916e4 JR	57
	58	/*
	59	* Booting a (Linux) kernel image
	60	*
	61	* Allocate space for command line and board info - the
	62	* address should be as high as possible within the reach of
	63	* the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
	64	* memory, which means far enough below the current stack
	65	* pointer.
	66	*/
	67	sp = get_sp();
	68	debug("## Current stack ends at 0x%08lx ", sp);
	69
fcfa696b RH	70	/* adjust sp by 4K to be safe */
fcfa696b RH	71	sp -= 4096;
15751403	72	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
f8878da5 SG	73	if (!gd->bd->bi_dram[bank].size \|\|
f8878da5 SG	74	sp < gd->bd->bi_dram[bank].start)
15751403	75	continue;
f8878da5	76	/* Watch out for RAM at end of address space! */
15751403	77	bank_end = gd->bd->bi_dram[bank].start +
f8878da5 SG	78	gd->bd->bi_dram[bank].size - 1;
f8878da5 SG	79	if (sp > bank_end)
15751403	80	continue;
8ce1f10c PC	81	if (bank_end > gd->ram_top)
	82	bank_end = gd->ram_top - 1;
	83
f8878da5	84	lmb_reserve(lmb, sp, bank_end - sp + 1);
15751403 SW	85	break;
15751403 SW	86	}
2d1916e4 JR	87	}
2d1916e4 JR	88
b7b8410a AG	89	__weak void board_quiesce_devices(void)
	90	{
	91	}
	92
bce1b92a SG	93	/**
	94	* announce_and_cleanup() - Print message and prepare for kernel boot
	95	*
	96	* @fake: non-zero to do everything except actually boot
	97	*/
	98	static void announce_and_cleanup(int fake)
2d1916e4	99	{
0a672d49	100	bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
94fd1316	101	#ifdef CONFIG_BOOTSTAGE_FDT
91290cf7	102	bootstage_fdt_add_report();
94fd1316	103	#endif
0a672d49 SS	104	#ifdef CONFIG_BOOTSTAGE_REPORT
	105	bootstage_report();
	106	#endif
1055171e	107
0a672d49 SS	108	#ifdef CONFIG_USB_DEVICE
0a672d49 SS	109	udc_disconnect();
2d1916e4	110	#endif
b7b8410a AG	111
	112	board_quiesce_devices();
	113
6dad56d7 K	114	printf("\nStarting kernel ...%s\n\n", fake ?
6dad56d7 K	115	"(fake run for tracing)" : "");
1b8220aa SR	116	/*
	117	* Call remove function of all devices with a removal flag set.
	118	* This may be useful for last-stage operations, like cancelling
	119	* of DMA operation or releasing device internal buffers.
	120	*/
	121	dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
	122
0a672d49 SS	123	cleanup_before_linux();
0a672d49 SS	124	}
c609719b	125
5779d8d9	126	static void setup_start_tag (bd_t *bd)
c609719b	127	{
0a672d49	128	params = (struct tag *)bd->bi_boot_params;
c609719b	129
5779d8d9 WD	130	params->hdr.tag = ATAG_CORE;
5779d8d9 WD	131	params->hdr.size = tag_size (tag_core);
c609719b	132
5779d8d9 WD	133	params->u.core.flags = 0;
	134	params->u.core.pagesize = 0;
	135	params->u.core.rootdev = 0;
c609719b	136
5779d8d9	137	params = tag_next (params);
c609719b	138	}
c609719b	139
0a672d49	140	static void setup_memory_tags(bd_t *bd)
c609719b	141	{
5779d8d9	142	int i;
c609719b	143
5779d8d9 WD	144	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
	145	params->hdr.tag = ATAG_MEM;
	146	params->hdr.size = tag_size (tag_mem32);
c609719b	147
5779d8d9 WD	148	params->u.mem.start = bd->bi_dram[i].start;
5779d8d9 WD	149	params->u.mem.size = bd->bi_dram[i].size;
c609719b	150
5779d8d9 WD	151	params = tag_next (params);
5779d8d9 WD	152	}
c609719b	153	}
c609719b	154
0a672d49	155	static void setup_commandline_tag(bd_t bd, char commandline)
c609719b	156	{
5779d8d9	157	char *p;
c609719b	158
109c0e3a WD	159	if (!commandline)
	160	return;
	161
5779d8d9 WD	162	/* eat leading white space */
5779d8d9 WD	163	for (p = commandline; *p == ' '; p++);
c609719b	164
5779d8d9 WD	165	/* skip non-existent command lines so the kernel will still
	166	* use its default command line.
	167	*/
	168	if (*p == '\0')
	169	return;
c609719b	170
5779d8d9 WD	171	params->hdr.tag = ATAG_CMDLINE;
	172	params->hdr.size =
	173	(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
c609719b	174
5779d8d9	175	strcpy (params->u.cmdline.cmdline, p);
c609719b	176
5779d8d9	177	params = tag_next (params);
c609719b	178	}
c609719b	179
0a672d49	180	static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
c609719b	181	{
5779d8d9 WD	182	/* an ATAG_INITRD node tells the kernel where the compressed
	183	* ramdisk can be found. ATAG_RDIMG is a better name, actually.
	184	*/
498b8db7	185	params->hdr.tag = ATAG_INITRD2;
5779d8d9	186	params->hdr.size = tag_size (tag_initrd);
c609719b	187
5779d8d9 WD	188	params->u.initrd.start = initrd_start;
5779d8d9 WD	189	params->u.initrd.size = initrd_end - initrd_start;
c609719b	190
5779d8d9	191	params = tag_next (params);
c609719b WD	192	}
c609719b WD	193
c19d13b0	194	static void setup_serial_tag(struct tag **tmp)
3a574cbe WD	195	{
	196	struct tag params = tmp;
	197	struct tag_serialnr serialnr;
3a574cbe WD	198
	199	get_board_serial(&serialnr);
	200	params->hdr.tag = ATAG_SERIAL;
	201	params->hdr.size = tag_size (tag_serialnr);
	202	params->u.serialnr.low = serialnr.low;
	203	params->u.serialnr.high= serialnr.high;
	204	params = tag_next (params);
	205	*tmp = params;
	206	}
3a574cbe	207
c19d13b0	208	static void setup_revision_tag(struct tag **in_params)
289f932c WD	209	{
289f932c WD	210	u32 rev = 0;
289f932c WD	211
289f932c WD	212	rev = get_board_rev();
289f932c WD	213	params->hdr.tag = ATAG_REVISION;
	214	params->hdr.size = tag_size (tag_revision);
	215	params->u.revision.rev = rev;
	216	params = tag_next (params);
	217	}
289f932c	218
0a672d49	219	static void setup_end_tag(bd_t *bd)
c609719b	220	{
5779d8d9 WD	221	params->hdr.tag = ATAG_NONE;
5779d8d9 WD	222	params->hdr.size = 0;
c609719b WD	223	}
c609719b WD	224
89e6f138 T	225	__weak void setup_board_tags(struct tag **in_params) {}
89e6f138 T	226
f510aeae	227	#ifdef CONFIG_ARM64
bb975455 AP	228	static void do_nonsec_virt_switch(void)
bb975455 AP	229	{
0ae76531	230	smp_kick_all_cpus();
dcd468b8	231	dcache_disable(); /* flush cache before swtiching to EL2 */
bb975455	232	}
f510aeae	233	#endif
bb975455	234
899a9de3 LV	235	__weak void board_prep_linux(bootm_headers_t *images) { }
899a9de3 LV	236
0a672d49 SS	237	/* Subcommand: PREP */
	238	static void boot_prep_linux(bootm_headers_t *images)
	239	{
00caae6d	240	char *commandline = env_get("bootargs");
0a672d49	241
c19d13b0	242	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
0a672d49	243	#ifdef CONFIG_OF_LIBFDT
0a672d49	244	debug("using: FDT\n");
6caa1956	245	if (image_setup_linux(images)) {
0a672d49 SS	246	printf("FDT creation failed! hanging...");
	247	hang();
	248	}
0a672d49	249	#endif
c19d13b0	250	} else if (BOOTM_ENABLE_TAGS) {
0a672d49 SS	251	debug("using: ATAGS\n");
0a672d49 SS	252	setup_start_tag(gd->bd);
c19d13b0 SG	253	if (BOOTM_ENABLE_SERIAL_TAG)
	254	setup_serial_tag(&params);
	255	if (BOOTM_ENABLE_CMDLINE_TAG)
	256	setup_commandline_tag(gd->bd, commandline);
	257	if (BOOTM_ENABLE_REVISION_TAG)
	258	setup_revision_tag(&params);
	259	if (BOOTM_ENABLE_MEMORY_TAGS)
	260	setup_memory_tags(gd->bd);
	261	if (BOOTM_ENABLE_INITRD_TAG) {
f7ee071a JC	262	/*
	263	* In boot_ramdisk_high(), it may relocate ramdisk to
	264	* a specified location. And set images->initrd_start &
	265	* images->initrd_end to relocated ramdisk's start/end
	266	* addresses. So use them instead of images->rd_start &
	267	* images->rd_end when possible.
	268	*/
	269	if (images->initrd_start && images->initrd_end) {
	270	setup_initrd_tag(gd->bd, images->initrd_start,
	271	images->initrd_end);
	272	} else if (images->rd_start && images->rd_end) {
c19d13b0 SG	273	setup_initrd_tag(gd->bd, images->rd_start,
	274	images->rd_end);
	275	}
	276	}
89e6f138	277	setup_board_tags(&params);
0a672d49	278	setup_end_tag(gd->bd);
c19d13b0	279	} else {
0a672d49 SS	280	printf("FDT and ATAGS support not compiled in - hanging\n");
0a672d49 SS	281	hang();
0a672d49	282	}
899a9de3 LV	283
899a9de3 LV	284	board_prep_linux(images);
0a672d49 SS	285	}
0a672d49 SS	286
f225d39d	287	__weak bool armv7_boot_nonsec_default(void)
8bc347e2	288	{
8bc347e2	289	#ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
f225d39d	290	return false;
8bc347e2	291	#else
f225d39d	292	return true;
8bc347e2	293	#endif
f225d39d JMT	294	}
	295
	296	#ifdef CONFIG_ARMV7_NONSEC
	297	bool armv7_boot_nonsec(void)
	298	{
00caae6d	299	char *s = env_get("bootm_boot_mode");
f225d39d	300	bool nonsec = armv7_boot_nonsec_default();
8bc347e2 HG	301
	302	if (s && !strcmp(s, "sec"))
	303	nonsec = false;
	304
	305	if (s && !strcmp(s, "nonsec"))
	306	nonsec = true;
	307
	308	return nonsec;
	309	}
	310	#endif
	311
ec6617c3	312	#ifdef CONFIG_ARM64
e2c18e40 AW	313	__weak void update_os_arch_secondary_cores(uint8_t os_arch)
	314	{
	315	}
	316
ec6617c3 AW	317	#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
	318	static void switch_to_el1(void)
	319	{
	320	if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
	321	(images.os.arch == IH_ARCH_ARM))
	322	armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number,
7c5e1feb	323	(u64)images.ft_addr, 0,
ec6617c3 AW	324	(u64)images.ep,
	325	ES_TO_AARCH32);
	326	else
7c5e1feb	327	armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0,
ec6617c3 AW	328	images.ep,
	329	ES_TO_AARCH64);
	330	}
	331	#endif
	332	#endif
	333
0a672d49	334	/* Subcommand: GO */
bce1b92a	335	static void boot_jump_linux(bootm_headers_t *images, int flag)
0a672d49	336	{
0ae76531	337	#ifdef CONFIG_ARM64
3f1b6beb TR	338	void (kernel_entry)(void fdt_addr, void res0, void res1,
3f1b6beb TR	339	void *res2);
0ae76531 DF	340	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
0ae76531 DF	341
3f1b6beb TR	342	kernel_entry = (void ()(void fdt_addr, void res0, void res1,
3f1b6beb TR	343	void *res2))images->ep;
0ae76531 DF	344
	345	debug("## Transferring control to Linux (at address %lx)...\n",
	346	(ulong) kernel_entry);
	347	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
	348
	349	announce_and_cleanup(fake);
	350
c19e0dd7	351	if (!fake) {
9a561753	352	#ifdef CONFIG_ARMV8_PSCI
	353	armv8_setup_psci();
	354	#endif
c19e0dd7	355	do_nonsec_virt_switch();
ec6617c3	356
e2c18e40 AW	357	update_os_arch_secondary_cores(images->os.arch);
e2c18e40 AW	358
ec6617c3	359	#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
7c5e1feb	360	armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
ec6617c3 AW	361	(u64)switch_to_el1, ES_TO_AARCH64);
	362	#else
	363	if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
	364	(images->os.arch == IH_ARCH_ARM))
	365	armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number,
7c5e1feb	366	(u64)images->ft_addr, 0,
ec6617c3 AW	367	(u64)images->ep,
	368	ES_TO_AARCH32);
	369	else
7c5e1feb	370	armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
ec6617c3 AW	371	images->ep,
	372	ES_TO_AARCH64);
	373	#endif
c19e0dd7	374	}
0ae76531	375	#else
0a672d49 SS	376	unsigned long machid = gd->bd->bi_arch_number;
	377	char *s;
	378	void (*kernel_entry)(int zero, int arch, uint params);
17239976	379	unsigned long r2;
bce1b92a	380	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
0a672d49 SS	381
0a672d49 SS	382	kernel_entry = (void (*)(int, int, uint))images->ep;
dc89c6fb PC	383	#ifdef CONFIG_CPU_V7M
	384	ulong addr = (ulong)kernel_entry \| 1;
	385	kernel_entry = (void *)addr;
	386	#endif
00caae6d	387	s = env_get("machid");
0a672d49	388	if (s) {
bc3c89b1 PF	389	if (strict_strtoul(s, 16, &machid) < 0) {
	390	debug("strict_strtoul failed!\n");
	391	return;
	392	}
0a672d49 SS	393	printf("Using machid 0x%lx from environment\n", machid);
	394	}
	395
	396	debug("## Transferring control to Linux (at address %08lx)" \
	397	"...\n", (ulong) kernel_entry);
	398	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
bce1b92a	399	announce_and_cleanup(fake);
17239976	400
c19d13b0	401	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
17239976 SW	402	r2 = (unsigned long)images->ft_addr;
17239976 SW	403	else
17239976 SW	404	r2 = gd->bd->bi_boot_params;
17239976 SW	405
c19e0dd7	406	if (!fake) {
104d6fb6	407	#ifdef CONFIG_ARMV7_NONSEC
97a81964	408	if (armv7_boot_nonsec()) {
8bc347e2 HG	409	armv7_init_nonsec();
	410	secure_ram_addr(_do_nonsec_entry)(kernel_entry,
	411	0, machid, r2);
	412	} else
f510aeae	413	#endif
8bc347e2	414	kernel_entry(0, machid, r2);
c19e0dd7	415	}
0ae76531	416	#endif
0a672d49 SS	417	}
	418
	419	/* Main Entry point for arm bootm implementation
	420	*
	421	* Modeled after the powerpc implementation
	422	* DIFFERENCE: Instead of calling prep and go at the end
	423	* they are called if subcommand is equal 0.
	424	*/
8d196e52 EN	425	int do_bootm_linux(int flag, int argc, char * const argv[],
8d196e52 EN	426	bootm_headers_t *images)
0a672d49 SS	427	{
	428	/* No need for those on ARM */
	429	if (flag & BOOTM_STATE_OS_BD_T \|\| flag & BOOTM_STATE_OS_CMDLINE)
	430	return -1;
	431
	432	if (flag & BOOTM_STATE_OS_PREP) {
	433	boot_prep_linux(images);
	434	return 0;
	435	}
	436
bce1b92a SG	437	if (flag & (BOOTM_STATE_OS_GO \| BOOTM_STATE_OS_FAKE_GO)) {
bce1b92a SG	438	boot_jump_linux(images, flag);
0a672d49 SS	439	return 0;
	440	}
	441
	442	boot_prep_linux(images);
bce1b92a	443	boot_jump_linux(images, flag);
0a672d49	444	return 0;
2d1916e4	445	}
44f074c7	446
871a57bb MY	447	#if defined(CONFIG_BOOTM_VXWORKS)
	448	void boot_prep_vxworks(bootm_headers_t *images)
	449	{
	450	#if defined(CONFIG_OF_LIBFDT)
	451	int off;
	452
	453	if (images->ft_addr) {
	454	off = fdt_path_offset(images->ft_addr, "/memory");
7f1cb1d5	455	if (off > 0) {
e29607ed	456	if (arch_fixup_fdt(images->ft_addr))
871a57bb MY	457	puts("## WARNING: fixup memory failed!\n");
	458	}
	459	}
	460	#endif
	461	cleanup_before_linux();
	462	}
	463	void boot_jump_vxworks(bootm_headers_t *images)
	464	{
3194daa1 VV	465	#if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
	466	armv8_setup_psci();
	467	smp_kick_all_cpus();
	468	#endif
	469
871a57bb MY	470	/* ARM VxWorks requires device tree physical address to be passed */
	471	((void ()(void ))images->ep)(images->ft_addr);
	472	}
	473	#endif