64 lines
2.6 KiB
Diff
64 lines
2.6 KiB
Diff
--- hw/pc.c.orig 2007-02-06 07:01:54.000000000 +0800
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+++ hw/pc.c 2007-04-01 22:19:50.000000000 +0800
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@@ -32,9 +32,11 @@
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#define LINUX_BOOT_FILENAME "linux_boot.bin"
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#define KERNEL_LOAD_ADDR 0x00100000
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-#define INITRD_LOAD_ADDR 0x00600000
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+#define MAX_INITRD_LOAD_ADDR 0x38000000
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#define KERNEL_PARAMS_ADDR 0x00090000
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#define KERNEL_CMDLINE_ADDR 0x00099000
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+/* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables. */
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+#define ACPI_DATA_SIZE 0x10000
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static fdctrl_t *floppy_controller;
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static RTCState *rtc_state;
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@@ -451,7 +453,7 @@
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{
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char buf[1024];
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int ret, linux_boot, initrd_size, i;
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- unsigned long bios_offset, vga_bios_offset, option_rom_offset;
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+ unsigned long bios_offset, vga_bios_offset, option_rom_offset, initrd_offset;
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int bios_size, isa_bios_size;
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PCIBus *pci_bus;
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int piix3_devfn = -1;
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@@ -576,8 +578,28 @@
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/* load initrd */
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initrd_size = 0;
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+ initrd_offset = 0;
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if (initrd_filename) {
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- initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
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+ initrd_size = get_image_size (initrd_filename);
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+ if (initrd_size > 0) {
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+ initrd_offset = (ram_size - initrd_size) & TARGET_PAGE_MASK;
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+ /* Leave space for BIOS ACPI tables. */
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+ initrd_offset -= ACPI_DATA_SIZE;
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+ /* Avoid the last 64k to avoid 2.2.x kernel bugs. */
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+ initrd_offset -= 0x10000;
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+ if (initrd_offset > MAX_INITRD_LOAD_ADDR)
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+ initrd_offset = MAX_INITRD_LOAD_ADDR;
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+
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+ if (initrd_size > ram_size
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+ || initrd_offset < KERNEL_LOAD_ADDR + ret) {
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+ fprintf(stderr,
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+ "qemu: memory too small for initial ram disk '%s'\n",
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+ initrd_filename);
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+ exit(1);
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+ }
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+ initrd_size = load_image(initrd_filename,
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+ phys_ram_base + initrd_offset);
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+ }
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if (initrd_size < 0) {
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fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
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initrd_filename);
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@@ -585,7 +607,7 @@
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}
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}
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if (initrd_size > 0) {
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- stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, INITRD_LOAD_ADDR);
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+ stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, initrd_offset);
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stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
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}
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pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
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