-/*
+/*
* ARM kernel loader.
*
- * Copyright (c) 2006 CodeSourcery.
+ * Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
*
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
*/
-#include "vl.h"
+#include "config.h"
+#include "hw.h"
+#include "arm-misc.h"
+#include "sysemu.h"
+#include "boards.h"
+#include "loader.h"
+#include "elf.h"
+#include "device_tree.h"
#define KERNEL_ARGS_ADDR 0x100
#define KERNEL_LOAD_ADDR 0x00010000
-#define INITRD_LOAD_ADDR 0x00800000
+#define INITRD_LOAD_ADDR 0x00d00000
/* 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] */
+ 0xe59f1004, /* ldr r1, [pc, #4] */
+ 0xe59f2004, /* ldr r2, [pc, #4] */
+ 0xe59ff004, /* ldr pc, [pc, #4] */
+ 0, /* Board ID */
0, /* Address of kernel args. Set by integratorcp_init. */
0 /* Kernel entry point. Set by integratorcp_init. */
};
-static void main_cpu_reset(void *opaque)
+/* Handling for secondary CPU boot in a multicore system.
+ * Unlike the uniprocessor/primary CPU boot, this is platform
+ * dependent. The default code here is based on the secondary
+ * CPU boot protocol used on realview/vexpress boards, with
+ * some parameterisation to increase its flexibility.
+ * QEMU platform models for which this code is not appropriate
+ * should override write_secondary_boot and secondary_cpu_reset_hook
+ * instead.
+ *
+ * This code enables the interrupt controllers for the secondary
+ * CPUs and then puts all the secondary CPUs into a loop waiting
+ * for an interprocessor interrupt and polling a configurable
+ * location for the kernel secondary CPU entry point.
+ */
+static uint32_t smpboot[] = {
+ 0xe59f201c, /* ldr r2, gic_cpu_if */
+ 0xe59f001c, /* ldr r0, startaddr */
+ 0xe3a01001, /* mov r1, #1 */
+ 0xe5821000, /* str r1, [r2] */
+ 0xe320f003, /* wfi */
+ 0xe5901000, /* ldr r1, [r0] */
+ 0xe1110001, /* tst r1, r1 */
+ 0x0afffffb, /* beq <wfi> */
+ 0xe12fff11, /* bx r1 */
+ 0, /* gic_cpu_if: base address of GIC CPU interface */
+ 0 /* bootreg: Boot register address is held here */
+};
+
+static void default_write_secondary(ARMCPU *cpu,
+ const struct arm_boot_info *info)
+{
+ int n;
+ smpboot[ARRAY_SIZE(smpboot) - 1] = info->smp_bootreg_addr;
+ smpboot[ARRAY_SIZE(smpboot) - 2] = info->gic_cpu_if_addr;
+ for (n = 0; n < ARRAY_SIZE(smpboot); n++) {
+ smpboot[n] = tswap32(smpboot[n]);
+ }
+ rom_add_blob_fixed("smpboot", smpboot, sizeof(smpboot),
+ info->smp_loader_start);
+}
+
+static void default_reset_secondary(ARMCPU *cpu,
+ const struct arm_boot_info *info)
{
- CPUState *env = opaque;
+ CPUARMState *env = &cpu->env;
- 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);
+ stl_phys_notdirty(info->smp_bootreg_addr, 0);
+ env->regs[15] = info->smp_loader_start;
}
-static void set_kernel_args(uint32_t ram_size, int initrd_size,
- const char *kernel_cmdline)
+#define WRITE_WORD(p, value) do { \
+ stl_phys_notdirty(p, value); \
+ p += 4; \
+} while (0)
+
+static void set_kernel_args(const struct arm_boot_info *info)
{
- uint32_t *p;
+ int initrd_size = info->initrd_size;
+ target_phys_addr_t base = info->loader_start;
+ target_phys_addr_t p;
- p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
+ p = 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);
+ WRITE_WORD(p, 5);
+ WRITE_WORD(p, 0x54410001);
+ WRITE_WORD(p, 1);
+ WRITE_WORD(p, 0x1000);
+ WRITE_WORD(p, 0);
/* ATAG_MEM */
- stl_raw(p++, 4);
- stl_raw(p++, 0x54410002);
- stl_raw(p++, ram_size);
- stl_raw(p++, 0);
+ /* TODO: handle multiple chips on one ATAG list */
+ WRITE_WORD(p, 4);
+ WRITE_WORD(p, 0x54410002);
+ WRITE_WORD(p, info->ram_size);
+ WRITE_WORD(p, info->loader_start);
if (initrd_size) {
/* ATAG_INITRD2 */
- stl_raw(p++, 4);
- stl_raw(p++, 0x54420005);
- stl_raw(p++, INITRD_LOAD_ADDR);
- stl_raw(p++, initrd_size);
+ WRITE_WORD(p, 4);
+ WRITE_WORD(p, 0x54420005);
+ WRITE_WORD(p, info->loader_start + INITRD_LOAD_ADDR);
+ WRITE_WORD(p, initrd_size);
}
- if (kernel_cmdline && *kernel_cmdline) {
+ if (info->kernel_cmdline && *info->kernel_cmdline) {
/* ATAG_CMDLINE */
int cmdline_size;
- cmdline_size = strlen(kernel_cmdline);
- memcpy (p + 2, kernel_cmdline, cmdline_size + 1);
+ cmdline_size = strlen(info->kernel_cmdline);
+ cpu_physical_memory_write(p + 8, (void *)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;
+ WRITE_WORD(p, cmdline_size + 2);
+ WRITE_WORD(p, 0x54410009);
+ p += cmdline_size * 4;
+ }
+ if (info->atag_board) {
+ /* ATAG_BOARD */
+ int atag_board_len;
+ uint8_t atag_board_buf[0x1000];
+
+ atag_board_len = (info->atag_board(info, atag_board_buf) + 3) & ~3;
+ WRITE_WORD(p, (atag_board_len + 8) >> 2);
+ WRITE_WORD(p, 0x414f4d50);
+ cpu_physical_memory_write(p, atag_board_buf, atag_board_len);
+ p += atag_board_len;
}
/* ATAG_END */
- stl_raw(p++, 0);
- stl_raw(p++, 0);
+ WRITE_WORD(p, 0);
+ WRITE_WORD(p, 0);
+}
+
+static void set_kernel_args_old(const struct arm_boot_info *info)
+{
+ target_phys_addr_t p;
+ const char *s;
+ int initrd_size = info->initrd_size;
+ target_phys_addr_t base = info->loader_start;
+
+ /* see linux/include/asm-arm/setup.h */
+ p = base + KERNEL_ARGS_ADDR;
+ /* page_size */
+ WRITE_WORD(p, 4096);
+ /* nr_pages */
+ WRITE_WORD(p, info->ram_size / 4096);
+ /* ramdisk_size */
+ WRITE_WORD(p, 0);
+#define FLAG_READONLY 1
+#define FLAG_RDLOAD 4
+#define FLAG_RDPROMPT 8
+ /* flags */
+ WRITE_WORD(p, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT);
+ /* rootdev */
+ WRITE_WORD(p, (31 << 8) | 0); /* /dev/mtdblock0 */
+ /* video_num_cols */
+ WRITE_WORD(p, 0);
+ /* video_num_rows */
+ WRITE_WORD(p, 0);
+ /* video_x */
+ WRITE_WORD(p, 0);
+ /* video_y */
+ WRITE_WORD(p, 0);
+ /* memc_control_reg */
+ WRITE_WORD(p, 0);
+ /* unsigned char sounddefault */
+ /* unsigned char adfsdrives */
+ /* unsigned char bytes_per_char_h */
+ /* unsigned char bytes_per_char_v */
+ WRITE_WORD(p, 0);
+ /* pages_in_bank[4] */
+ WRITE_WORD(p, 0);
+ WRITE_WORD(p, 0);
+ WRITE_WORD(p, 0);
+ WRITE_WORD(p, 0);
+ /* pages_in_vram */
+ WRITE_WORD(p, 0);
+ /* initrd_start */
+ if (initrd_size)
+ WRITE_WORD(p, info->loader_start + INITRD_LOAD_ADDR);
+ else
+ WRITE_WORD(p, 0);
+ /* initrd_size */
+ WRITE_WORD(p, initrd_size);
+ /* rd_start */
+ WRITE_WORD(p, 0);
+ /* system_rev */
+ WRITE_WORD(p, 0);
+ /* system_serial_low */
+ WRITE_WORD(p, 0);
+ /* system_serial_high */
+ WRITE_WORD(p, 0);
+ /* mem_fclk_21285 */
+ WRITE_WORD(p, 0);
+ /* zero unused fields */
+ while (p < base + KERNEL_ARGS_ADDR + 256 + 1024) {
+ WRITE_WORD(p, 0);
+ }
+ s = info->kernel_cmdline;
+ if (s) {
+ cpu_physical_memory_write(p, (void *)s, strlen(s) + 1);
+ } else {
+ WRITE_WORD(p, 0);
+ }
+}
+
+static int load_dtb(target_phys_addr_t addr, const struct arm_boot_info *binfo)
+{
+#ifdef CONFIG_FDT
+ uint32_t mem_reg_property[] = { cpu_to_be32(binfo->loader_start),
+ cpu_to_be32(binfo->ram_size) };
+ void *fdt = NULL;
+ char *filename;
+ int size, rc;
+
+ filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, binfo->dtb_filename);
+ if (!filename) {
+ fprintf(stderr, "Couldn't open dtb file %s\n", binfo->dtb_filename);
+ return -1;
+ }
+
+ fdt = load_device_tree(filename, &size);
+ if (!fdt) {
+ fprintf(stderr, "Couldn't open dtb file %s\n", filename);
+ g_free(filename);
+ return -1;
+ }
+ g_free(filename);
+
+ rc = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
+ sizeof(mem_reg_property));
+ if (rc < 0) {
+ fprintf(stderr, "couldn't set /memory/reg\n");
+ }
+
+ if (binfo->kernel_cmdline && *binfo->kernel_cmdline) {
+ rc = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
+ binfo->kernel_cmdline);
+ if (rc < 0) {
+ fprintf(stderr, "couldn't set /chosen/bootargs\n");
+ }
+ }
+
+ if (binfo->initrd_size) {
+ rc = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
+ binfo->loader_start + INITRD_LOAD_ADDR);
+ if (rc < 0) {
+ fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
+ }
+
+ rc = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
+ binfo->loader_start + INITRD_LOAD_ADDR +
+ binfo->initrd_size);
+ if (rc < 0) {
+ fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
+ }
+ }
+
+ cpu_physical_memory_write(addr, fdt, size);
+
+ return 0;
+
+#else
+ fprintf(stderr, "Device tree requested, "
+ "but qemu was compiled without fdt support\n");
+ return -1;
+#endif
}
-void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
- const char *kernel_cmdline, const char *initrd_filename,
- int board_id)
+static void do_cpu_reset(void *opaque)
{
+ ARMCPU *cpu = opaque;
+ CPUARMState *env = &cpu->env;
+ const struct arm_boot_info *info = env->boot_info;
+
+ cpu_reset(CPU(cpu));
+ if (info) {
+ if (!info->is_linux) {
+ /* Jump to the entry point. */
+ env->regs[15] = info->entry & 0xfffffffe;
+ env->thumb = info->entry & 1;
+ } else {
+ if (env == first_cpu) {
+ env->regs[15] = info->loader_start;
+ if (!info->dtb_filename) {
+ if (old_param) {
+ set_kernel_args_old(info);
+ } else {
+ set_kernel_args(info);
+ }
+ }
+ } else {
+ info->secondary_cpu_reset_hook(cpu, info);
+ }
+ }
+ }
+}
+
+void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info)
+{
+ CPUARMState *env = &cpu->env;
int kernel_size;
int initrd_size;
int n;
int is_linux = 0;
uint64_t elf_entry;
- target_ulong entry;
+ target_phys_addr_t entry;
+ int big_endian;
+ QemuOpts *machine_opts;
/* Load the kernel. */
- if (!kernel_filename) {
+ if (!info->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;
- qemu_register_reset(main_cpu_reset, env);
+ machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
+ if (machine_opts) {
+ info->dtb_filename = qemu_opt_get(machine_opts, "dtb");
+ } else {
+ info->dtb_filename = NULL;
+ }
+
+ if (!info->secondary_cpu_reset_hook) {
+ info->secondary_cpu_reset_hook = default_reset_secondary;
}
+ if (!info->write_secondary_boot) {
+ info->write_secondary_boot = default_write_secondary;
+ }
+
+ if (info->nb_cpus == 0)
+ info->nb_cpus = 1;
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ big_endian = 1;
+#else
+ big_endian = 0;
+#endif
+
/* Assume that raw images are linux kernels, and ELF images are not. */
- kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
+ kernel_size = load_elf(info->kernel_filename, NULL, NULL, &elf_entry,
+ NULL, NULL, big_endian, ELF_MACHINE, 1);
entry = elf_entry;
if (kernel_size < 0) {
- kernel_size = load_uboot(kernel_filename, &entry, &is_linux);
+ kernel_size = load_uimage(info->kernel_filename, &entry, NULL,
+ &is_linux);
}
if (kernel_size < 0) {
- kernel_size = load_image(kernel_filename,
- phys_ram_base + KERNEL_LOAD_ADDR);
- entry = KERNEL_LOAD_ADDR;
+ entry = info->loader_start + KERNEL_LOAD_ADDR;
+ kernel_size = load_image_targphys(info->kernel_filename, entry,
+ ram_size - KERNEL_LOAD_ADDR);
is_linux = 1;
}
if (kernel_size < 0) {
- fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
+ 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 (initrd_filename) {
- initrd_size = load_image(initrd_filename,
- phys_ram_base + INITRD_LOAD_ADDR);
+ info->entry = entry;
+ if (is_linux) {
+ if (info->initrd_filename) {
+ initrd_size = load_image_targphys(info->initrd_filename,
+ info->loader_start
+ + INITRD_LOAD_ADDR,
+ ram_size - INITRD_LOAD_ADDR);
if (initrd_size < 0) {
fprintf(stderr, "qemu: could not load initrd '%s'\n",
- initrd_filename);
+ info->initrd_filename);
exit(1);
}
} else {
initrd_size = 0;
}
- bootloader[1] |= board_id & 0xff;
- bootloader[2] |= (board_id >> 8) & 0xff;
- bootloader[5] = KERNEL_ARGS_ADDR;
+ info->initrd_size = initrd_size;
+
+ bootloader[4] = info->board_id;
+
+ /* for device tree boot, we pass the DTB directly in r2. Otherwise
+ * we point to the kernel args.
+ */
+ if (info->dtb_filename) {
+ /* Place the DTB after the initrd in memory */
+ target_phys_addr_t dtb_start = TARGET_PAGE_ALIGN(info->loader_start
+ + INITRD_LOAD_ADDR
+ + initrd_size);
+ if (load_dtb(dtb_start, info)) {
+ exit(1);
+ }
+ bootloader[5] = dtb_start;
+ } else {
+ bootloader[5] = info->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]);
- set_kernel_args(ram_size, initrd_size, kernel_cmdline);
+ for (n = 0; n < sizeof(bootloader) / 4; n++) {
+ bootloader[n] = tswap32(bootloader[n]);
+ }
+ rom_add_blob_fixed("bootloader", bootloader, sizeof(bootloader),
+ info->loader_start);
+ if (info->nb_cpus > 1) {
+ info->write_secondary_boot(cpu, info);
+ }
}
-}
+ info->is_linux = is_linux;
+ for (; env; env = env->next_cpu) {
+ cpu = arm_env_get_cpu(env);
+ env->boot_info = info;
+ qemu_register_reset(do_cpu_reset, cpu);
+ }
+}
projects / qemu.git / blobdiff