[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 "vl.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->kernel_filename)
        arm_load_kernel(env, env->ram_size, env->kernel_filename,
                        env->kernel_cmdline, env->initrd_filename,
                        env->board_id, env->loader_start);

    /* TODO:  Reset secondary CPUs.  */
}

static void set_kernel_args(uint32_t ram_size, int initrd_size,
                            const char *kernel_cmdline,
                            target_phys_addr_t loader_start)
{
    uint32_t *p;

    p = (uint32_t *)(phys_ram_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 */
    stl_raw(p++, 4);
    stl_raw(p++, 0x54410002);
    stl_raw(p++, ram_size);
    stl_raw(p++, loader_start);
    if (initrd_size) {
        /* ATAG_INITRD2 */
        stl_raw(p++, 4);
        stl_raw(p++, 0x54420005);
        stl_raw(p++, loader_start + INITRD_LOAD_ADDR);
        stl_raw(p++, initrd_size);
    }
    if (kernel_cmdline && *kernel_cmdline) {
        /* ATAG_CMDLINE */
        int cmdline_size;

        cmdline_size = strlen(kernel_cmdline);
        memcpy (p + 2, kernel_cmdline, cmdline_size + 1);
        cmdline_size = (cmdline_size >> 2) + 1;
        stl_raw(p++, cmdline_size + 2);
        stl_raw(p++, 0x54410009);
        p += cmdline_size;
    }
    /* ATAG_END */
    stl_raw(p++, 0);
    stl_raw(p++, 0);
}

static void set_kernel_args_old(uint32_t ram_size, int initrd_size,
                                const char *kernel_cmdline,
                                target_phys_addr_t loader_start)
{
    uint32_t *p;
    unsigned char *s;

    /* see linux/include/asm-arm/setup.h */
    p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
    /* page_size */
    stl_raw(p++, 4096);
    /* nr_pages */
    stl_raw(p++, 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++, 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 *)(phys_ram_base + KERNEL_ARGS_ADDR))));
    s = phys_ram_base + KERNEL_ARGS_ADDR + 256 + 1024;
    if (kernel_cmdline)
        strcpy (s, kernel_cmdline);
    else
        stb_raw(s, 0);
}

void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
                     const char *kernel_cmdline, const char *initrd_filename,
                     int board_id, target_phys_addr_t loader_start)
{
    int kernel_size;
    int initrd_size;
    int n;
    int is_linux = 0;
    uint64_t elf_entry;
    target_ulong entry;

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

    if (!env->kernel_filename) {
        env->ram_size = ram_size;
        env->kernel_filename = kernel_filename;
        env->kernel_cmdline = kernel_cmdline;
        env->initrd_filename = initrd_filename;
        env->board_id = board_id;
        env->loader_start = loader_start;
        qemu_register_reset(main_cpu_reset, env);
    }
    /* Assume that raw images are linux kernels, and ELF images are not.  */
    kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
    entry = elf_entry;
    if (kernel_size < 0) {
        kernel_size = load_uboot(kernel_filename, &entry, &is_linux);
    }
    if (kernel_size < 0) {
        kernel_size = load_image(kernel_filename,
                                 phys_ram_base + KERNEL_LOAD_ADDR);
        entry = loader_start + KERNEL_LOAD_ADDR;
        is_linux = 1;
    }
    if (kernel_size < 0) {
        fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
        exit(1);
    }
    if (!is_linux) {
        /* Jump to the entry point.  */
        env->regs[15] = entry & 0xfffffffe;
        env->thumb = entry & 1;
    } else {
        if (initrd_filename) {
            initrd_size = load_image(initrd_filename,
                                     phys_ram_base + INITRD_LOAD_ADDR);
            if (initrd_size < 0) {
                fprintf(stderr, "qemu: could not load initrd '%s'\n",
                        initrd_filename);
                exit(1);
            }
        } else {
            initrd_size = 0;
        }
        bootloader[1] |= board_id & 0xff;
        bootloader[2] |= (board_id >> 8) & 0xff;
        bootloader[5] = loader_start + KERNEL_ARGS_ADDR;
        bootloader[6] = entry;
        for (n = 0; n < sizeof(bootloader) / 4; n++)
            stl_raw(phys_ram_base + (n * 4), bootloader[n]);
        for (n = 0; n < sizeof(smpboot) / 4; n++)
            stl_raw(phys_ram_base + ram_size + (n * 4), smpboot[n]);
        if (old_param)
            set_kernel_args_old(ram_size, initrd_size,
                                kernel_cmdline, loader_start);
        else
            set_kernel_args(ram_size, initrd_size,
                            kernel_cmdline, loader_start);
    }
}
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
	10	#include "vl.h"
	11
	12	#define KERNEL_ARGS_ADDR 0x100
	13	#define KERNEL_LOAD_ADDR 0x00010000
	14	#define INITRD_LOAD_ADDR 0x00800000
	15
	16	/* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
	17	static uint32_t bootloader[] = {
	18	0xe3a00000, /* mov r0, #0 */
	19	0xe3a01000, /* mov r1, #0x?? */
	20	0xe3811c00, /* orr r1, r1, #0x??00 */
	21	0xe59f2000, /* ldr r2, [pc, #0] */
	22	0xe59ff000, /* ldr pc, [pc, #0] */
	23	0, /* Address of kernel args. Set by integratorcp_init. */
	24	0 /* Kernel entry point. Set by integratorcp_init. */
	25	};
	26
9ee6e8bb PB	27	/* Entry point for secondary CPUs. Enable interrupt controller and
	28	Issue WFI until start address is written to system controller. */
	29	static uint32_t smpboot[] = {
	30	0xe3a00201, /* mov r0, #0x10000000 */
	31	0xe3800601, /* orr r0, r0, #0x001000000 */
	32	0xe3a01001, /* mov r1, #1 */
	33	0xe5801100, /* str r1, [r0, #0x100] */
	34	0xe3a00201, /* mov r0, #0x10000000 */
	35	0xe3800030, /* orr r0, #0x30 */
	36	0xe320f003, /* wfi */
	37	0xe5901000, /* ldr r1, [r0] */
	38	0xe3110003, /* tst r1, #3 */
	39	0x1afffffb, /* bne <wfi> */
	40	0xe12fff11 /* bx r1 */
	41	};
	42
f3d6b95e PB	43	static void main_cpu_reset(void *opaque)
	44	{
	45	CPUState *env = opaque;
	46
	47	cpu_reset(env);
	48	if (env->kernel_filename)
5fafdf24 TS	49	arm_load_kernel(env, env->ram_size, env->kernel_filename,
5fafdf24 TS	50	env->kernel_cmdline, env->initrd_filename,
9d551997	51	env->board_id, env->loader_start);
9ee6e8bb PB	52
9ee6e8bb PB	53	/* TODO: Reset secondary CPUs. */
f3d6b95e PB	54	}
f3d6b95e PB	55
16406950	56	static void set_kernel_args(uint32_t ram_size, int initrd_size,
9d551997 AZ	57	const char *kernel_cmdline,
9d551997 AZ	58	target_phys_addr_t loader_start)
16406950 PB	59	{
	60	uint32_t *p;
	61
	62	p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
	63	/* ATAG_CORE */
	64	stl_raw(p++, 5);
	65	stl_raw(p++, 0x54410001);
	66	stl_raw(p++, 1);
	67	stl_raw(p++, 0x1000);
	68	stl_raw(p++, 0);
	69	/* ATAG_MEM */
	70	stl_raw(p++, 4);
	71	stl_raw(p++, 0x54410002);
	72	stl_raw(p++, ram_size);
9d551997	73	stl_raw(p++, loader_start);
16406950 PB	74	if (initrd_size) {
	75	/* ATAG_INITRD2 */
	76	stl_raw(p++, 4);
	77	stl_raw(p++, 0x54420005);
9d551997	78	stl_raw(p++, loader_start + INITRD_LOAD_ADDR);
16406950 PB	79	stl_raw(p++, initrd_size);
	80	}
	81	if (kernel_cmdline && *kernel_cmdline) {
	82	/* ATAG_CMDLINE */
	83	int cmdline_size;
	84
	85	cmdline_size = strlen(kernel_cmdline);
	86	memcpy (p + 2, kernel_cmdline, cmdline_size + 1);
	87	cmdline_size = (cmdline_size >> 2) + 1;
	88	stl_raw(p++, cmdline_size + 2);
	89	stl_raw(p++, 0x54410009);
	90	p += cmdline_size;
	91	}
	92	/* ATAG_END */
	93	stl_raw(p++, 0);
	94	stl_raw(p++, 0);
	95	}
	96
2b8f2d41 AZ	97	static void set_kernel_args_old(uint32_t ram_size, int initrd_size,
	98	const char *kernel_cmdline,
	99	target_phys_addr_t loader_start)
	100	{
	101	uint32_t *p;
	102	unsigned char *s;
	103
	104	/* see linux/include/asm-arm/setup.h */
	105	p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
	106	/* page_size */
	107	stl_raw(p++, 4096);
	108	/* nr_pages */
	109	stl_raw(p++, ram_size / 4096);
	110	/* ramdisk_size */
	111	stl_raw(p++, 0);
	112	#define FLAG_READONLY 1
	113	#define FLAG_RDLOAD 4
	114	#define FLAG_RDPROMPT 8
	115	/* flags */
	116	stl_raw(p++, FLAG_READONLY \| FLAG_RDLOAD \| FLAG_RDPROMPT);
	117	/* rootdev */
	118	stl_raw(p++, (31 << 8) \| 0); /* /dev/mtdblock0 */
	119	/* video_num_cols */
	120	stl_raw(p++, 0);
	121	/* video_num_rows */
	122	stl_raw(p++, 0);
	123	/* video_x */
	124	stl_raw(p++, 0);
	125	/* video_y */
	126	stl_raw(p++, 0);
	127	/* memc_control_reg */
	128	stl_raw(p++, 0);
	129	/* unsigned char sounddefault */
	130	/* unsigned char adfsdrives */
	131	/* unsigned char bytes_per_char_h */
	132	/* unsigned char bytes_per_char_v */
	133	stl_raw(p++, 0);
	134	/* pages_in_bank[4] */
	135	stl_raw(p++, 0);
	136	stl_raw(p++, 0);
	137	stl_raw(p++, 0);
	138	stl_raw(p++, 0);
	139	/* pages_in_vram */
	140	stl_raw(p++, 0);
	141	/* initrd_start */
	142	if (initrd_size)
	143	stl_raw(p++, loader_start + INITRD_LOAD_ADDR);
	144	else
	145	stl_raw(p++, 0);
	146	/* initrd_size */
	147	stl_raw(p++, initrd_size);
	148	/* rd_start */
	149	stl_raw(p++, 0);
	150	/* system_rev */
	151	stl_raw(p++, 0);
	152	/* system_serial_low */
	153	stl_raw(p++, 0);
	154	/* system_serial_high */
	155	stl_raw(p++, 0);
	156	/* mem_fclk_21285 */
	157	stl_raw(p++, 0);
	158	/* zero unused fields */
	159	memset(p, 0, 256 + 1024 -
	160	(p - ((uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR))));
161	s = phys_ram_base + KERNEL_ARGS_ADDR + 256 + 1024;
162	if (kernel_cmdline)
163	strcpy (s, kernel_cmdline);
164	else
165	stb_raw(s, 0);
166	}
167
daf90626	168	void arm_load_kernel(CPUState env, int ram_size, const char kernel_filename,
16406950	169	const char kernel_cmdline, const char initrd_filename,
9d551997	170	int board_id, target_phys_addr_t loader_start)
16406950 PB	171	{
	172	int kernel_size;
	173	int initrd_size;
	174	int n;
1c7b3754 PB	175	int is_linux = 0;
	176	uint64_t elf_entry;
	177	target_ulong entry;
16406950 PB	178
	179	/* Load the kernel. */
	180	if (!kernel_filename) {
	181	fprintf(stderr, "Kernel image must be specified\n");
	182	exit(1);
	183	}
daf90626	184
f3d6b95e PB	185	if (!env->kernel_filename) {
	186	env->ram_size = ram_size;
	187	env->kernel_filename = kernel_filename;
	188	env->kernel_cmdline = kernel_cmdline;
	189	env->initrd_filename = initrd_filename;
	190	env->board_id = board_id;
9d551997	191	env->loader_start = loader_start;
f3d6b95e PB	192	qemu_register_reset(main_cpu_reset, env);
f3d6b95e PB	193	}
1c7b3754	194	/* Assume that raw images are linux kernels, and ELF images are not. */
74287114	195	kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
1c7b3754 PB	196	entry = elf_entry;
	197	if (kernel_size < 0) {
	198	kernel_size = load_uboot(kernel_filename, &entry, &is_linux);
	199	}
	200	if (kernel_size < 0) {
	201	kernel_size = load_image(kernel_filename,
	202	phys_ram_base + KERNEL_LOAD_ADDR);
9d551997	203	entry = loader_start + KERNEL_LOAD_ADDR;
1c7b3754 PB	204	is_linux = 1;
	205	}
	206	if (kernel_size < 0) {
	207	fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
	208	exit(1);
	209	}
	210	if (!is_linux) {
	211	/* Jump to the entry point. */
daf90626 PB	212	env->regs[15] = entry & 0xfffffffe;
	213	env->thumb = entry & 1;
	214	} else {
daf90626 PB	215	if (initrd_filename) {
	216	initrd_size = load_image(initrd_filename,
	217	phys_ram_base + INITRD_LOAD_ADDR);
	218	if (initrd_size < 0) {
	219	fprintf(stderr, "qemu: could not load initrd '%s'\n",
	220	initrd_filename);
	221	exit(1);
	222	}
	223	} else {
	224	initrd_size = 0;
	225	}
	226	bootloader[1] \|= board_id & 0xff;
	227	bootloader[2] \|= (board_id >> 8) & 0xff;
9d551997	228	bootloader[5] = loader_start + KERNEL_ARGS_ADDR;
1c7b3754	229	bootloader[6] = entry;
daf90626 PB	230	for (n = 0; n < sizeof(bootloader) / 4; n++)
daf90626 PB	231	stl_raw(phys_ram_base + (n * 4), bootloader[n]);
9ee6e8bb PB	232	for (n = 0; n < sizeof(smpboot) / 4; n++)
9ee6e8bb PB	233	stl_raw(phys_ram_base + ram_size + (n * 4), smpboot[n]);
2b8f2d41 AZ	234	if (old_param)
	235	set_kernel_args_old(ram_size, initrd_size,
	236	kernel_cmdline, loader_start);
	237	else
	238	set_kernel_args(ram_size, initrd_size,
	239	kernel_cmdline, loader_start);
16406950	240	}
16406950	241	}