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21cafd08a6
qemu/hw/arm_boot.c
aliguori 21cafd08a6 uImage: return base load address (Hollis Blanchard) 
Return the base address at which the image was loaded so that callers may keep
track of currently occupied guest memory.

This will be required by the PPC 440 embedded code to avoid hard coding a
device model/initrd location.  Other users of this function could make use of
this parameter to avoid hard coding these locations in the future too.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5763 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-20 22:11:52 +00:00

253 lines
7.3 KiB
C
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/*
* 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, NULL,
&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);
}
}
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