diff options
| -rw-r--r-- | hw/pc.c | 29 |
1 files changed, 26 insertions, 3 deletions
@@ -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; @@ -452,6 +454,7 @@ static void pc_init1(int ram_size, int vga_ram_size, int boot_device, char buf[1024]; int ret, linux_boot, initrd_size, i; ram_addr_t ram_addr, vga_ram_addr, bios_offset, vga_bios_offset; + ram_addr_t initrd_offset; int bios_size, isa_bios_size, vga_bios_size; PCIBus *pci_bus; int piix3_devfn = -1; @@ -599,8 +602,28 @@ static void pc_init1(int ram_size, int vga_ram_size, int boot_device, /* 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); @@ -608,7 +631,7 @@ static void pc_init1(int ram_size, int vga_ram_size, int boot_device, } } 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, |