qemu/qemu-0.9.0-load-initrd.patch

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