hw/i386/pc: format load_linux function
Signed-off-by: liguang <lig.fnst@cn.fujitsu.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
parent
9941afdef4
commit
0f9d76e5a9
109
hw/i386/pc.c
109
hw/i386/pc.c
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@ -646,8 +646,8 @@ static long get_file_size(FILE *f)
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static void load_linux(void *fw_cfg,
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const char *kernel_filename,
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const char *initrd_filename,
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const char *kernel_cmdline,
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const char *initrd_filename,
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const char *kernel_cmdline,
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hwaddr max_ram_size)
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{
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uint16_t protocol;
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@ -664,60 +664,62 @@ static void load_linux(void *fw_cfg,
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/* load the kernel header */
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f = fopen(kernel_filename, "rb");
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if (!f || !(kernel_size = get_file_size(f)) ||
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fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) !=
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MIN(ARRAY_SIZE(header), kernel_size)) {
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fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
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kernel_filename, strerror(errno));
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exit(1);
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fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) !=
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MIN(ARRAY_SIZE(header), kernel_size)) {
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fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
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kernel_filename, strerror(errno));
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exit(1);
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}
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/* kernel protocol version */
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#if 0
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fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
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#endif
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if (ldl_p(header+0x202) == 0x53726448)
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protocol = lduw_p(header+0x206);
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else {
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/* This looks like a multiboot kernel. If it is, let's stop
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treating it like a Linux kernel. */
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if (ldl_p(header+0x202) == 0x53726448) {
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protocol = lduw_p(header+0x206);
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} else {
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/* This looks like a multiboot kernel. If it is, let's stop
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treating it like a Linux kernel. */
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if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
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kernel_cmdline, kernel_size, header))
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kernel_cmdline, kernel_size, header)) {
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return;
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protocol = 0;
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}
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protocol = 0;
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}
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if (protocol < 0x200 || !(header[0x211] & 0x01)) {
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/* Low kernel */
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real_addr = 0x90000;
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cmdline_addr = 0x9a000 - cmdline_size;
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prot_addr = 0x10000;
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/* Low kernel */
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real_addr = 0x90000;
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cmdline_addr = 0x9a000 - cmdline_size;
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prot_addr = 0x10000;
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} else if (protocol < 0x202) {
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/* High but ancient kernel */
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real_addr = 0x90000;
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cmdline_addr = 0x9a000 - cmdline_size;
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prot_addr = 0x100000;
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/* High but ancient kernel */
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real_addr = 0x90000;
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cmdline_addr = 0x9a000 - cmdline_size;
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prot_addr = 0x100000;
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} else {
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/* High and recent kernel */
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real_addr = 0x10000;
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cmdline_addr = 0x20000;
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prot_addr = 0x100000;
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/* High and recent kernel */
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real_addr = 0x10000;
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cmdline_addr = 0x20000;
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prot_addr = 0x100000;
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}
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#if 0
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fprintf(stderr,
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"qemu: real_addr = 0x" TARGET_FMT_plx "\n"
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"qemu: cmdline_addr = 0x" TARGET_FMT_plx "\n"
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"qemu: prot_addr = 0x" TARGET_FMT_plx "\n",
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real_addr,
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cmdline_addr,
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prot_addr);
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"qemu: real_addr = 0x" TARGET_FMT_plx "\n"
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"qemu: cmdline_addr = 0x" TARGET_FMT_plx "\n"
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"qemu: prot_addr = 0x" TARGET_FMT_plx "\n",
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real_addr,
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cmdline_addr,
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prot_addr);
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#endif
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/* highest address for loading the initrd */
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if (protocol >= 0x203)
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initrd_max = ldl_p(header+0x22c);
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else
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initrd_max = 0x37ffffff;
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if (protocol >= 0x203) {
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initrd_max = ldl_p(header+0x22c);
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} else {
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initrd_max = 0x37ffffff;
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}
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if (initrd_max >= max_ram_size-ACPI_DATA_SIZE)
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initrd_max = max_ram_size-ACPI_DATA_SIZE-1;
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@ -727,10 +729,10 @@ static void load_linux(void *fw_cfg,
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fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline);
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if (protocol >= 0x202) {
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stl_p(header+0x228, cmdline_addr);
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stl_p(header+0x228, cmdline_addr);
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} else {
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stw_p(header+0x20, 0xA33F);
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stw_p(header+0x22, cmdline_addr-real_addr);
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stw_p(header+0x20, 0xA33F);
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stw_p(header+0x22, cmdline_addr-real_addr);
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}
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/* handle vga= parameter */
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@ -755,23 +757,23 @@ static void load_linux(void *fw_cfg,
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/* High nybble = B reserved for QEMU; low nybble is revision number.
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If this code is substantially changed, you may want to consider
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incrementing the revision. */
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if (protocol >= 0x200)
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header[0x210] = 0xB0;
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if (protocol >= 0x200) {
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header[0x210] = 0xB0;
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}
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/* heap */
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if (protocol >= 0x201) {
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header[0x211] |= 0x80; /* CAN_USE_HEAP */
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stw_p(header+0x224, cmdline_addr-real_addr-0x200);
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header[0x211] |= 0x80; /* CAN_USE_HEAP */
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stw_p(header+0x224, cmdline_addr-real_addr-0x200);
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}
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/* load initrd */
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if (initrd_filename) {
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if (protocol < 0x200) {
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fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
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exit(1);
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}
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if (protocol < 0x200) {
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fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
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exit(1);
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}
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initrd_size = get_image_size(initrd_filename);
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initrd_size = get_image_size(initrd_filename);
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if (initrd_size < 0) {
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fprintf(stderr, "qemu: error reading initrd %s\n",
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initrd_filename);
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@ -787,14 +789,15 @@ static void load_linux(void *fw_cfg,
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fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
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fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data, initrd_size);
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stl_p(header+0x218, initrd_addr);
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stl_p(header+0x21c, initrd_size);
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stl_p(header+0x218, initrd_addr);
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stl_p(header+0x21c, initrd_size);
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}
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/* load kernel and setup */
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setup_size = header[0x1f1];
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if (setup_size == 0)
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setup_size = 4;
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if (setup_size == 0) {
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setup_size = 4;
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}
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setup_size = (setup_size+1)*512;
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kernel_size -= setup_size;
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