--- /dev/null
+/*
+ * QEMU PC System Emulator
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/hw.h"
+#include "hw/nvram/fw_cfg.h"
+#include "multiboot.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "sysemu/sysemu.h"
+
+/* Show multiboot debug output */
+//#define DEBUG_MULTIBOOT
+
+#ifdef DEBUG_MULTIBOOT
+#define mb_debug(a...) fprintf(stderr, ## a)
+#else
+#define mb_debug(a...)
+#endif
+
+#define MULTIBOOT_STRUCT_ADDR 0x9000
+
+#if MULTIBOOT_STRUCT_ADDR > 0xf0000
+#error multiboot struct needs to fit in 16 bit real mode
+#endif
+
+enum {
+ /* Multiboot info */
+ MBI_FLAGS = 0,
+ MBI_MEM_LOWER = 4,
+ MBI_MEM_UPPER = 8,
+ MBI_BOOT_DEVICE = 12,
+ MBI_CMDLINE = 16,
+ MBI_MODS_COUNT = 20,
+ MBI_MODS_ADDR = 24,
+ MBI_MMAP_ADDR = 48,
+ MBI_BOOTLOADER = 64,
+
+ MBI_SIZE = 88,
+
+ /* Multiboot modules */
+ MB_MOD_START = 0,
+ MB_MOD_END = 4,
+ MB_MOD_CMDLINE = 8,
+
+ MB_MOD_SIZE = 16,
+
+ /* Region offsets */
+ ADDR_E820_MAP = MULTIBOOT_STRUCT_ADDR + 0,
+ ADDR_MBI = ADDR_E820_MAP + 0x500,
+
+ /* Multiboot flags */
+ MULTIBOOT_FLAGS_MEMORY = 1 << 0,
+ MULTIBOOT_FLAGS_BOOT_DEVICE = 1 << 1,
+ MULTIBOOT_FLAGS_CMDLINE = 1 << 2,
+ MULTIBOOT_FLAGS_MODULES = 1 << 3,
+ MULTIBOOT_FLAGS_MMAP = 1 << 6,
+ MULTIBOOT_FLAGS_BOOTLOADER = 1 << 9,
+};
+
+typedef struct {
+ /* buffer holding kernel, cmdlines and mb_infos */
+ void *mb_buf;
+ /* address in target */
+ hwaddr mb_buf_phys;
+ /* size of mb_buf in bytes */
+ unsigned mb_buf_size;
+ /* offset of mb-info's in bytes */
+ hwaddr offset_mbinfo;
+ /* offset in buffer for cmdlines in bytes */
+ hwaddr offset_cmdlines;
+ /* offset in buffer for bootloader name in bytes */
+ hwaddr offset_bootloader;
+ /* offset of modules in bytes */
+ hwaddr offset_mods;
+ /* available slots for mb modules infos */
+ int mb_mods_avail;
+ /* currently used slots of mb modules */
+ int mb_mods_count;
+} MultibootState;
+
+const char *bootloader_name = "qemu";
+
+static uint32_t mb_add_cmdline(MultibootState *s, const char *cmdline)
+{
+ hwaddr p = s->offset_cmdlines;
+ char *b = (char *)s->mb_buf + p;
+
+ get_opt_value(b, strlen(cmdline) + 1, cmdline);
+ s->offset_cmdlines += strlen(b) + 1;
+ return s->mb_buf_phys + p;
+}
+
+static uint32_t mb_add_bootloader(MultibootState *s, const char *bootloader)
+{
+ hwaddr p = s->offset_bootloader;
+ char *b = (char *)s->mb_buf + p;
+
+ memcpy(b, bootloader, strlen(bootloader) + 1);
+ s->offset_bootloader += strlen(b) + 1;
+ return s->mb_buf_phys + p;
+}
+
+static void mb_add_mod(MultibootState *s,
+ hwaddr start, hwaddr end,
+ hwaddr cmdline_phys)
+{
+ char *p;
+ assert(s->mb_mods_count < s->mb_mods_avail);
+
+ p = (char *)s->mb_buf + s->offset_mbinfo + MB_MOD_SIZE * s->mb_mods_count;
+
+ stl_p(p + MB_MOD_START, start);
+ stl_p(p + MB_MOD_END, end);
+ stl_p(p + MB_MOD_CMDLINE, cmdline_phys);
+
+ mb_debug("mod%02d: "TARGET_FMT_plx" - "TARGET_FMT_plx"\n",
+ s->mb_mods_count, start, end);
+
+ s->mb_mods_count++;
+}
+
+int load_multiboot(FWCfgState *fw_cfg,
+ FILE *f,
+ const char *kernel_filename,
+ const char *initrd_filename,
+ const char *kernel_cmdline,
+ int kernel_file_size,
+ uint8_t *header)
+{
+ int i, is_multiboot = 0;
+ uint32_t flags = 0;
+ uint32_t mh_entry_addr;
+ uint32_t mh_load_addr;
+ uint32_t mb_kernel_size;
+ MultibootState mbs;
+ uint8_t bootinfo[MBI_SIZE];
+ uint8_t *mb_bootinfo_data;
+ uint32_t cmdline_len;
+
+ /* Ok, let's see if it is a multiboot image.
+ The header is 12x32bit long, so the latest entry may be 8192 - 48. */
+ for (i = 0; i < (8192 - 48); i += 4) {
+ if (ldl_p(header+i) == 0x1BADB002) {
+ uint32_t checksum = ldl_p(header+i+8);
+ flags = ldl_p(header+i+4);
+ checksum += flags;
+ checksum += (uint32_t)0x1BADB002;
+ if (!checksum) {
+ is_multiboot = 1;
+ break;
+ }
+ }
+ }
+
+ if (!is_multiboot)
+ return 0; /* no multiboot */
+
+ mb_debug("qemu: I believe we found a multiboot image!\n");
+ memset(bootinfo, 0, sizeof(bootinfo));
+ memset(&mbs, 0, sizeof(mbs));
+
+ if (flags & 0x00000004) { /* MULTIBOOT_HEADER_HAS_VBE */
+ fprintf(stderr, "qemu: multiboot knows VBE. we don't.\n");
+ }
+ if (!(flags & 0x00010000)) { /* MULTIBOOT_HEADER_HAS_ADDR */
+ uint64_t elf_entry;
+ uint64_t elf_low, elf_high;
+ int kernel_size;
+ fclose(f);
+
+ if (((struct elf64_hdr*)header)->e_machine == EM_X86_64) {
+ fprintf(stderr, "Cannot load x86-64 image, give a 32bit one.\n");
+ exit(1);
+ }
+
+ kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
+ &elf_low, &elf_high, 0, ELF_MACHINE, 0);
+ if (kernel_size < 0) {
+ fprintf(stderr, "Error while loading elf kernel\n");
+ exit(1);
+ }
+ mh_load_addr = elf_low;
+ mb_kernel_size = elf_high - elf_low;
+ mh_entry_addr = elf_entry;
+
+ mbs.mb_buf = g_malloc(mb_kernel_size);
+ if (rom_copy(mbs.mb_buf, mh_load_addr, mb_kernel_size) != mb_kernel_size) {
+ fprintf(stderr, "Error while fetching elf kernel from rom\n");
+ exit(1);
+ }
+
+ mb_debug("qemu: loading multiboot-elf kernel (%#x bytes) with entry %#zx\n",
+ mb_kernel_size, (size_t)mh_entry_addr);
+ } else {
+ /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_ADDR. */
+ uint32_t mh_header_addr = ldl_p(header+i+12);
+ uint32_t mh_load_end_addr = ldl_p(header+i+20);
+ uint32_t mh_bss_end_addr = ldl_p(header+i+24);
+ mh_load_addr = ldl_p(header+i+16);
+ uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
+ uint32_t mb_load_size = 0;
+ mh_entry_addr = ldl_p(header+i+28);
+
+ if (mh_load_end_addr) {
+ mb_kernel_size = mh_bss_end_addr - mh_load_addr;
+ mb_load_size = mh_load_end_addr - mh_load_addr;
+ } else {
+ mb_kernel_size = kernel_file_size - mb_kernel_text_offset;
+ mb_load_size = mb_kernel_size;
+ }
+
+ /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
+ uint32_t mh_mode_type = ldl_p(header+i+32);
+ uint32_t mh_width = ldl_p(header+i+36);
+ uint32_t mh_height = ldl_p(header+i+40);
+ uint32_t mh_depth = ldl_p(header+i+44); */
+
+ mb_debug("multiboot: mh_header_addr = %#x\n", mh_header_addr);
+ mb_debug("multiboot: mh_load_addr = %#x\n", mh_load_addr);
+ mb_debug("multiboot: mh_load_end_addr = %#x\n", mh_load_end_addr);
+ mb_debug("multiboot: mh_bss_end_addr = %#x\n", mh_bss_end_addr);
+ mb_debug("qemu: loading multiboot kernel (%#x bytes) at %#x\n",
+ mb_load_size, mh_load_addr);
+
+ mbs.mb_buf = g_malloc(mb_kernel_size);
+ fseek(f, mb_kernel_text_offset, SEEK_SET);
+ if (fread(mbs.mb_buf, 1, mb_load_size, f) != mb_load_size) {
+ fprintf(stderr, "fread() failed\n");
+ exit(1);
+ }
+ memset(mbs.mb_buf + mb_load_size, 0, mb_kernel_size - mb_load_size);
+ fclose(f);
+ }
+
+ mbs.mb_buf_phys = mh_load_addr;
+
+ mbs.mb_buf_size = TARGET_PAGE_ALIGN(mb_kernel_size);
+ mbs.offset_mbinfo = mbs.mb_buf_size;
+
+ /* Calculate space for cmdlines, bootloader name, and mb_mods */
+ cmdline_len = strlen(kernel_filename) + 1;
+ cmdline_len += strlen(kernel_cmdline) + 1;
+ if (initrd_filename) {
+ const char *r = initrd_filename;
+ cmdline_len += strlen(r) + 1;
+ mbs.mb_mods_avail = 1;
+ while (*(r = get_opt_value(NULL, 0, r))) {
+ mbs.mb_mods_avail++;
+ r++;
+ }
+ }
+
+ mbs.mb_buf_size += cmdline_len;
+ mbs.mb_buf_size += MB_MOD_SIZE * mbs.mb_mods_avail;
+ mbs.mb_buf_size += strlen(bootloader_name) + 1;
+
+ mbs.mb_buf_size = TARGET_PAGE_ALIGN(mbs.mb_buf_size);
+
+ /* enlarge mb_buf to hold cmdlines, bootloader, mb-info structs */
+ mbs.mb_buf = g_realloc(mbs.mb_buf, mbs.mb_buf_size);
+ mbs.offset_cmdlines = mbs.offset_mbinfo + mbs.mb_mods_avail * MB_MOD_SIZE;
+ mbs.offset_bootloader = mbs.offset_cmdlines + cmdline_len;
+
+ if (initrd_filename) {
+ char *next_initrd, not_last;
+
+ mbs.offset_mods = mbs.mb_buf_size;
+
+ do {
+ char *next_space;
+ int mb_mod_length;
+ uint32_t offs = mbs.mb_buf_size;
+
+ next_initrd = (char *)get_opt_value(NULL, 0, initrd_filename);
+ not_last = *next_initrd;
+ *next_initrd = '\0';
+ /* if a space comes after the module filename, treat everything
+ after that as parameters */
+ hwaddr c = mb_add_cmdline(&mbs, initrd_filename);
+ if ((next_space = strchr(initrd_filename, ' ')))
+ *next_space = '\0';
+ mb_debug("multiboot loading module: %s\n", initrd_filename);
+ mb_mod_length = get_image_size(initrd_filename);
+ if (mb_mod_length < 0) {
+ fprintf(stderr, "Failed to open file '%s'\n", initrd_filename);
+ exit(1);
+ }
+
+ mbs.mb_buf_size = TARGET_PAGE_ALIGN(mb_mod_length + mbs.mb_buf_size);
+ mbs.mb_buf = g_realloc(mbs.mb_buf, mbs.mb_buf_size);
+
+ load_image(initrd_filename, (unsigned char *)mbs.mb_buf + offs);
+ mb_add_mod(&mbs, mbs.mb_buf_phys + offs,
+ mbs.mb_buf_phys + offs + mb_mod_length, c);
+
+ mb_debug("mod_start: %p\nmod_end: %p\n cmdline: "TARGET_FMT_plx"\n",
+ (char *)mbs.mb_buf + offs,
+ (char *)mbs.mb_buf + offs + mb_mod_length, c);
+ initrd_filename = next_initrd+1;
+ } while (not_last);
+ }
+
+ /* Commandline support */
+ char kcmdline[strlen(kernel_filename) + strlen(kernel_cmdline) + 2];
+ snprintf(kcmdline, sizeof(kcmdline), "%s %s",
+ kernel_filename, kernel_cmdline);
+ stl_p(bootinfo + MBI_CMDLINE, mb_add_cmdline(&mbs, kcmdline));
+
+ stl_p(bootinfo + MBI_BOOTLOADER, mb_add_bootloader(&mbs, bootloader_name));
+
+ stl_p(bootinfo + MBI_MODS_ADDR, mbs.mb_buf_phys + mbs.offset_mbinfo);
+ stl_p(bootinfo + MBI_MODS_COUNT, mbs.mb_mods_count); /* mods_count */
+
+ /* the kernel is where we want it to be now */
+ stl_p(bootinfo + MBI_FLAGS, MULTIBOOT_FLAGS_MEMORY
+ | MULTIBOOT_FLAGS_BOOT_DEVICE
+ | MULTIBOOT_FLAGS_CMDLINE
+ | MULTIBOOT_FLAGS_MODULES
+ | MULTIBOOT_FLAGS_MMAP
+ | MULTIBOOT_FLAGS_BOOTLOADER);
+ stl_p(bootinfo + MBI_BOOT_DEVICE, 0x8000ffff); /* XXX: use the -boot switch? */
+ stl_p(bootinfo + MBI_MMAP_ADDR, ADDR_E820_MAP);
+
+ mb_debug("multiboot: mh_entry_addr = %#x\n", mh_entry_addr);
+ mb_debug(" mb_buf_phys = "TARGET_FMT_plx"\n", mbs.mb_buf_phys);
+ mb_debug(" mod_start = "TARGET_FMT_plx"\n", mbs.mb_buf_phys + mbs.offset_mods);
+ mb_debug(" mb_mods_count = %d\n", mbs.mb_mods_count);
+
+ /* save bootinfo off the stack */
+ mb_bootinfo_data = g_malloc(sizeof(bootinfo));
+ memcpy(mb_bootinfo_data, bootinfo, sizeof(bootinfo));
+
+ /* Pass variables to option rom */
+ fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ENTRY, mh_entry_addr);
+ fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, mh_load_addr);
+ fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, mbs.mb_buf_size);
+ fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA,
+ mbs.mb_buf, mbs.mb_buf_size);
+
+ fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, ADDR_MBI);
+ fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, sizeof(bootinfo));
+ fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, mb_bootinfo_data,
+ sizeof(bootinfo));
+
+ option_rom[nb_option_roms].name = "multiboot.bin";
+ option_rom[nb_option_roms].bootindex = 0;
+ nb_option_roms++;
+
+ return 1; /* yes, we are multiboot */
+}
Code Review / kvmfornfv.git / blobdiff