[qemu.git] / hw / arm_boot.c

/*
 * ARM kernel loader.
 *
 * Copyright (c) 2006-2007 CodeSourcery.
 * Written by Paul Brook
 *
 * This code is licenced under the GPL.
 */

#include "hw.h"
#include "arm-misc.h"
#include "sysemu.h"

#define KERNEL_ARGS_ADDR 0x100
#define KERNEL_LOAD_ADDR 0x00010000
#define INITRD_LOAD_ADDR 0x00800000

/* The worlds second smallest bootloader.  Set r0-r2, then jump to kernel.  */
static uint32_t bootloader[] = {
  0xe3a00000, /* mov     r0, #0 */
  0xe3a01000, /* mov     r1, #0x?? */
  0xe3811c00, /* orr     r1, r1, #0x??00 */
  0xe59f2000, /* ldr     r2, [pc, #0] */
  0xe59ff000, /* ldr     pc, [pc, #0] */
  0, /* Address of kernel args.  Set by integratorcp_init.  */
  0  /* Kernel entry point.  Set by integratorcp_init.  */
};

/* Entry point for secondary CPUs.  Enable interrupt controller and
   Issue WFI until start address is written to system controller.  */
static uint32_t smpboot[] = {
  0xe3a00201, /* mov     r0, #0x10000000 */
  0xe3800601, /* orr     r0, r0, #0x001000000 */
  0xe3a01001, /* mov     r1, #1 */
  0xe5801100, /* str     r1, [r0, #0x100] */
  0xe3a00201, /* mov     r0, #0x10000000 */
  0xe3800030, /* orr     r0, #0x30 */
  0xe320f003, /* wfi */
  0xe5901000, /* ldr     r1, [r0] */
  0xe3110003, /* tst     r1, #3 */
  0x1afffffb, /* bne     <wfi> */
  0xe12fff11  /* bx      r1 */
};

static void main_cpu_reset(void *opaque)
{
    CPUState *env = opaque;

    cpu_reset(env);
    if (env->boot_info)
        arm_load_kernel(env, env->boot_info);

    /* TODO:  Reset secondary CPUs.  */
}

static void set_kernel_args(struct arm_boot_info *info,
                int initrd_size, void *base)
{
    uint32_t *p;

    p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
    /* ATAG_CORE */
    stl_raw(p++, 5);
    stl_raw(p++, 0x54410001);
    stl_raw(p++, 1);
    stl_raw(p++, 0x1000);
    stl_raw(p++, 0);
    /* ATAG_MEM */
    /* TODO: handle multiple chips on one ATAG list */
    stl_raw(p++, 4);
    stl_raw(p++, 0x54410002);
    stl_raw(p++, info->ram_size);
    stl_raw(p++, info->loader_start);
    if (initrd_size) {
        /* ATAG_INITRD2 */
        stl_raw(p++, 4);
        stl_raw(p++, 0x54420005);
        stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
        stl_raw(p++, initrd_size);
    }
    if (info->kernel_cmdline && *info->kernel_cmdline) {
        /* ATAG_CMDLINE */
        int cmdline_size;

        cmdline_size = strlen(info->kernel_cmdline);
        memcpy(p + 2, info->kernel_cmdline, cmdline_size + 1);
        cmdline_size = (cmdline_size >> 2) + 1;
        stl_raw(p++, cmdline_size + 2);
        stl_raw(p++, 0x54410009);
        p += cmdline_size;
    }
    if (info->atag_board) {
        /* ATAG_BOARD */
        int atag_board_len;

        atag_board_len = (info->atag_board(info, p + 2) + 3) >> 2;
        stl_raw(p++, 2 + atag_board_len);
        stl_raw(p++, 0x414f4d50);
        p += atag_board_len;
    }
    /* ATAG_END */
    stl_raw(p++, 0);
    stl_raw(p++, 0);
}

static void set_kernel_args_old(struct arm_boot_info *info,
                int initrd_size, void *base)
{
    uint32_t *p;
    unsigned char *s;

    /* see linux/include/asm-arm/setup.h */
    p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
    /* page_size */
    stl_raw(p++, 4096);
    /* nr_pages */
    stl_raw(p++, info->ram_size / 4096);
    /* ramdisk_size */
    stl_raw(p++, 0);
#define FLAG_READONLY	1
#define FLAG_RDLOAD	4
#define FLAG_RDPROMPT	8
    /* flags */
    stl_raw(p++, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT);
    /* rootdev */
    stl_raw(p++, (31 << 8) | 0);	/* /dev/mtdblock0 */
    /* video_num_cols */
    stl_raw(p++, 0);
    /* video_num_rows */
    stl_raw(p++, 0);
    /* video_x */
    stl_raw(p++, 0);
    /* video_y */
    stl_raw(p++, 0);
    /* memc_control_reg */
    stl_raw(p++, 0);
    /* unsigned char sounddefault */
    /* unsigned char adfsdrives */
    /* unsigned char bytes_per_char_h */
    /* unsigned char bytes_per_char_v */
    stl_raw(p++, 0);
    /* pages_in_bank[4] */
    stl_raw(p++, 0);
    stl_raw(p++, 0);
    stl_raw(p++, 0);
    stl_raw(p++, 0);
    /* pages_in_vram */
    stl_raw(p++, 0);
    /* initrd_start */
    if (initrd_size)
        stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
    else
        stl_raw(p++, 0);
    /* initrd_size */
    stl_raw(p++, initrd_size);
    /* rd_start */
    stl_raw(p++, 0);
    /* system_rev */
    stl_raw(p++, 0);
    /* system_serial_low */
    stl_raw(p++, 0);
    /* system_serial_high */
    stl_raw(p++, 0);
    /* mem_fclk_21285 */
    stl_raw(p++, 0);
    /* zero unused fields */
    memset(p, 0, 256 + 1024 -
           (p - ((uint32_t *)(base + KERNEL_ARGS_ADDR))));
    s = base + KERNEL_ARGS_ADDR + 256 + 1024;
    if (info->kernel_cmdline)
        strcpy (s, info->kernel_cmdline);
    else
        stb_raw(s, 0);
}

void arm_load_kernel(CPUState *env, struct arm_boot_info *info)
{
    int kernel_size;
    int initrd_size;
    int n;
    int is_linux = 0;
    uint64_t elf_entry;
    target_ulong entry;
    uint32_t pd;
    void *loader_phys;

    /* Load the kernel.  */
    if (!info->kernel_filename) {
        fprintf(stderr, "Kernel image must be specified\n");
        exit(1);
    }

    if (!env->boot_info) {
        if (info->nb_cpus == 0)
            info->nb_cpus = 1;
        env->boot_info = info;
        qemu_register_reset(main_cpu_reset, env);
    }

    pd = cpu_get_physical_page_desc(info->loader_start);
    loader_phys = phys_ram_base + (pd & TARGET_PAGE_MASK) +
            (info->loader_start & ~TARGET_PAGE_MASK);

    /* Assume that raw images are linux kernels, and ELF images are not.  */
    kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL);
    entry = elf_entry;
    if (kernel_size < 0) {
        kernel_size = load_uboot(info->kernel_filename, &entry, &is_linux);
    }
    if (kernel_size < 0) {
        kernel_size = load_image(info->kernel_filename,
                                 loader_phys + KERNEL_LOAD_ADDR);
        entry = info->loader_start + KERNEL_LOAD_ADDR;
        is_linux = 1;
    }
    if (kernel_size < 0) {
        fprintf(stderr, "qemu: could not load kernel '%s'\n",
                info->kernel_filename);
        exit(1);
    }
    if (!is_linux) {
        /* Jump to the entry point.  */
        env->regs[15] = entry & 0xfffffffe;
        env->thumb = entry & 1;
    } else {
        if (info->initrd_filename) {
            initrd_size = load_image(info->initrd_filename,
                                     loader_phys + INITRD_LOAD_ADDR);
            if (initrd_size < 0) {
                fprintf(stderr, "qemu: could not load initrd '%s'\n",
                        info->initrd_filename);
                exit(1);
            }
        } else {
            initrd_size = 0;
        }
        bootloader[1] |= info->board_id & 0xff;
        bootloader[2] |= (info->board_id >> 8) & 0xff;
        bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR;
        bootloader[6] = entry;
        for (n = 0; n < sizeof(bootloader) / 4; n++)
            stl_raw(loader_phys + (n * 4), bootloader[n]);
        if (info->nb_cpus > 1)
            for (n = 0; n < sizeof(smpboot) / 4; n++)
                stl_raw(loader_phys + info->ram_size + (n * 4), smpboot[n]);
        if (old_param)
            set_kernel_args_old(info, initrd_size, loader_phys);
        else
            set_kernel_args(info, initrd_size, loader_phys);
    }
}
Commit	Line	Data
5fafdf24	1	/*
16406950 PB	2	* ARM kernel loader.
16406950 PB	3	*
9ee6e8bb	4	* Copyright (c) 2006-2007 CodeSourcery.
16406950 PB	5	* Written by Paul Brook
	6	*
	7	* This code is licenced under the GPL.
	8	*/
	9
87ecb68b PB	10	#include "hw.h"
	11	#include "arm-misc.h"
	12	#include "sysemu.h"
16406950 PB	13
	14	#define KERNEL_ARGS_ADDR 0x100
	15	#define KERNEL_LOAD_ADDR 0x00010000
	16	#define INITRD_LOAD_ADDR 0x00800000
	17
	18	/* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
	19	static uint32_t bootloader[] = {
	20	0xe3a00000, /* mov r0, #0 */
	21	0xe3a01000, /* mov r1, #0x?? */
	22	0xe3811c00, /* orr r1, r1, #0x??00 */
	23	0xe59f2000, /* ldr r2, [pc, #0] */
	24	0xe59ff000, /* ldr pc, [pc, #0] */
	25	0, /* Address of kernel args. Set by integratorcp_init. */
	26	0 /* Kernel entry point. Set by integratorcp_init. */
	27	};
	28
9ee6e8bb PB	29	/* Entry point for secondary CPUs. Enable interrupt controller and
	30	Issue WFI until start address is written to system controller. */
	31	static uint32_t smpboot[] = {
	32	0xe3a00201, /* mov r0, #0x10000000 */
	33	0xe3800601, /* orr r0, r0, #0x001000000 */
	34	0xe3a01001, /* mov r1, #1 */
	35	0xe5801100, /* str r1, [r0, #0x100] */
	36	0xe3a00201, /* mov r0, #0x10000000 */
	37	0xe3800030, /* orr r0, #0x30 */
	38	0xe320f003, /* wfi */
	39	0xe5901000, /* ldr r1, [r0] */
	40	0xe3110003, /* tst r1, #3 */
	41	0x1afffffb, /* bne <wfi> */
	42	0xe12fff11 /* bx r1 */
	43	};
	44
f3d6b95e PB	45	static void main_cpu_reset(void *opaque)
	46	{
	47	CPUState *env = opaque;
	48
	49	cpu_reset(env);
f93eb9ff AZ	50	if (env->boot_info)
f93eb9ff AZ	51	arm_load_kernel(env, env->boot_info);
9ee6e8bb PB	52
9ee6e8bb PB	53	/* TODO: Reset secondary CPUs. */
f3d6b95e PB	54	}
f3d6b95e PB	55
f93eb9ff AZ	56	static void set_kernel_args(struct arm_boot_info *info,
f93eb9ff AZ	57	int initrd_size, void *base)
16406950 PB	58	{
	59	uint32_t *p;
	60
f93eb9ff	61	p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
16406950 PB	62	/* ATAG_CORE */
	63	stl_raw(p++, 5);
	64	stl_raw(p++, 0x54410001);
	65	stl_raw(p++, 1);
	66	stl_raw(p++, 0x1000);
	67	stl_raw(p++, 0);
	68	/* ATAG_MEM */
f93eb9ff	69	/* TODO: handle multiple chips on one ATAG list */
16406950 PB	70	stl_raw(p++, 4);
16406950 PB	71	stl_raw(p++, 0x54410002);
f93eb9ff AZ	72	stl_raw(p++, info->ram_size);
f93eb9ff AZ	73	stl_raw(p++, info->loader_start);
16406950 PB	74	if (initrd_size) {
	75	/* ATAG_INITRD2 */
	76	stl_raw(p++, 4);
	77	stl_raw(p++, 0x54420005);
f93eb9ff	78	stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
16406950 PB	79	stl_raw(p++, initrd_size);
16406950 PB	80	}
f93eb9ff	81	if (info->kernel_cmdline && *info->kernel_cmdline) {
16406950 PB	82	/* ATAG_CMDLINE */
	83	int cmdline_size;
	84
f93eb9ff AZ	85	cmdline_size = strlen(info->kernel_cmdline);
f93eb9ff AZ	86	memcpy(p + 2, info->kernel_cmdline, cmdline_size + 1);
16406950 PB	87	cmdline_size = (cmdline_size >> 2) + 1;
	88	stl_raw(p++, cmdline_size + 2);
	89	stl_raw(p++, 0x54410009);
	90	p += cmdline_size;
	91	}
f93eb9ff AZ	92	if (info->atag_board) {
	93	/* ATAG_BOARD */
	94	int atag_board_len;
	95
	96	atag_board_len = (info->atag_board(info, p + 2) + 3) >> 2;
	97	stl_raw(p++, 2 + atag_board_len);
	98	stl_raw(p++, 0x414f4d50);
	99	p += atag_board_len;
	100	}
16406950 PB	101	/* ATAG_END */
	102	stl_raw(p++, 0);
	103	stl_raw(p++, 0);
	104	}
	105
f93eb9ff AZ	106	static void set_kernel_args_old(struct arm_boot_info *info,
f93eb9ff AZ	107	int initrd_size, void *base)
2b8f2d41 AZ	108	{
	109	uint32_t *p;
	110	unsigned char *s;
	111
	112	/* see linux/include/asm-arm/setup.h */
f93eb9ff	113	p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
2b8f2d41 AZ	114	/* page_size */
	115	stl_raw(p++, 4096);
	116	/* nr_pages */
f93eb9ff	117	stl_raw(p++, info->ram_size / 4096);
2b8f2d41 AZ	118	/* ramdisk_size */
	119	stl_raw(p++, 0);
	120	#define FLAG_READONLY 1
	121	#define FLAG_RDLOAD 4
	122	#define FLAG_RDPROMPT 8
	123	/* flags */
	124	stl_raw(p++, FLAG_READONLY \| FLAG_RDLOAD \| FLAG_RDPROMPT);
	125	/* rootdev */
	126	stl_raw(p++, (31 << 8) \| 0); /* /dev/mtdblock0 */
	127	/* video_num_cols */
	128	stl_raw(p++, 0);
	129	/* video_num_rows */
	130	stl_raw(p++, 0);
	131	/* video_x */
	132	stl_raw(p++, 0);
	133	/* video_y */
	134	stl_raw(p++, 0);
	135	/* memc_control_reg */
	136	stl_raw(p++, 0);
	137	/* unsigned char sounddefault */
	138	/* unsigned char adfsdrives */
	139	/* unsigned char bytes_per_char_h */
	140	/* unsigned char bytes_per_char_v */
	141	stl_raw(p++, 0);
	142	/* pages_in_bank[4] */
	143	stl_raw(p++, 0);
	144	stl_raw(p++, 0);
	145	stl_raw(p++, 0);
	146	stl_raw(p++, 0);
	147	/* pages_in_vram */
	148	stl_raw(p++, 0);
	149	/* initrd_start */
	150	if (initrd_size)
f93eb9ff	151	stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
2b8f2d41 AZ	152	else
	153	stl_raw(p++, 0);
	154	/* initrd_size */
	155	stl_raw(p++, initrd_size);
	156	/* rd_start */
	157	stl_raw(p++, 0);
	158	/* system_rev */
	159	stl_raw(p++, 0);
	160	/* system_serial_low */
	161	stl_raw(p++, 0);
	162	/* system_serial_high */
	163	stl_raw(p++, 0);
	164	/* mem_fclk_21285 */
	165	stl_raw(p++, 0);
	166	/* zero unused fields */
	167	memset(p, 0, 256 + 1024 -
f93eb9ff AZ	168	(p - ((uint32_t *)(base + KERNEL_ARGS_ADDR))));
	169	s = base + KERNEL_ARGS_ADDR + 256 + 1024;
	170	if (info->kernel_cmdline)
	171	strcpy (s, info->kernel_cmdline);
2b8f2d41 AZ	172	else
	173	stb_raw(s, 0);
	174	}
	175
f93eb9ff	176	void arm_load_kernel(CPUState env, struct arm_boot_info info)
16406950 PB	177	{
	178	int kernel_size;
	179	int initrd_size;
	180	int n;
1c7b3754 PB	181	int is_linux = 0;
	182	uint64_t elf_entry;
	183	target_ulong entry;
f93eb9ff AZ	184	uint32_t pd;
f93eb9ff AZ	185	void *loader_phys;
16406950 PB	186
16406950 PB	187	/* Load the kernel. */
f93eb9ff	188	if (!info->kernel_filename) {
16406950 PB	189	fprintf(stderr, "Kernel image must be specified\n");
	190	exit(1);
	191	}
daf90626	192
f93eb9ff AZ	193	if (!env->boot_info) {
	194	if (info->nb_cpus == 0)
	195	info->nb_cpus = 1;
	196	env->boot_info = info;
f3d6b95e PB	197	qemu_register_reset(main_cpu_reset, env);
f3d6b95e PB	198	}
f93eb9ff AZ	199
	200	pd = cpu_get_physical_page_desc(info->loader_start);
	201	loader_phys = phys_ram_base + (pd & TARGET_PAGE_MASK) +
	202	(info->loader_start & ~TARGET_PAGE_MASK);
	203
1c7b3754	204	/* Assume that raw images are linux kernels, and ELF images are not. */
f93eb9ff	205	kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL);
1c7b3754 PB	206	entry = elf_entry;
1c7b3754 PB	207	if (kernel_size < 0) {
f93eb9ff	208	kernel_size = load_uboot(info->kernel_filename, &entry, &is_linux);
1c7b3754 PB	209	}
1c7b3754 PB	210	if (kernel_size < 0) {
f93eb9ff AZ	211	kernel_size = load_image(info->kernel_filename,
	212	loader_phys + KERNEL_LOAD_ADDR);
	213	entry = info->loader_start + KERNEL_LOAD_ADDR;
1c7b3754 PB	214	is_linux = 1;
	215	}
	216	if (kernel_size < 0) {
f93eb9ff AZ	217	fprintf(stderr, "qemu: could not load kernel '%s'\n",
f93eb9ff AZ	218	info->kernel_filename);
1c7b3754 PB	219	exit(1);
	220	}
	221	if (!is_linux) {
	222	/* Jump to the entry point. */
daf90626 PB	223	env->regs[15] = entry & 0xfffffffe;
	224	env->thumb = entry & 1;
	225	} else {
f93eb9ff AZ	226	if (info->initrd_filename) {
	227	initrd_size = load_image(info->initrd_filename,
	228	loader_phys + INITRD_LOAD_ADDR);
daf90626 PB	229	if (initrd_size < 0) {
daf90626 PB	230	fprintf(stderr, "qemu: could not load initrd '%s'\n",
f93eb9ff	231	info->initrd_filename);
daf90626 PB	232	exit(1);
	233	}
	234	} else {
	235	initrd_size = 0;
	236	}
f93eb9ff AZ	237	bootloader[1] \|= info->board_id & 0xff;
	238	bootloader[2] \|= (info->board_id >> 8) & 0xff;
	239	bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR;
1c7b3754	240	bootloader[6] = entry;
daf90626	241	for (n = 0; n < sizeof(bootloader) / 4; n++)
f93eb9ff AZ	242	stl_raw(loader_phys + (n * 4), bootloader[n]);
	243	if (info->nb_cpus > 1)
	244	for (n = 0; n < sizeof(smpboot) / 4; n++)
	245	stl_raw(loader_phys + info->ram_size + (n * 4), smpboot[n]);
2b8f2d41	246	if (old_param)
f93eb9ff	247	set_kernel_args_old(info, initrd_size, loader_phys);
2b8f2d41	248	else
f93eb9ff	249	set_kernel_args(info, initrd_size, loader_phys);
16406950	250	}
16406950	251	}