From fe270d044d512a308fb1fdf02cb11db46df29cdb Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 20 Apr 2010 19:37:13 +0200 Subject: target-s390: add firmware code This patch adds a firmware blob to the S390 target. The blob is a simple implementation of a virtio client that tries to read the second stage bootloader from sectors described as of offset 0x20 in the MBR. In combination with an updated zipl this allows for booting from virtio block devices. This firmware is built from the same sources as the second stage bootloader. You can find a virtio capable s390-tools in this repo: git://repo.or.cz/s390-tools.git Signed-off-by: Alexander Graf Signed-off-by: Aurelien Jarno --- hw/s390-virtio.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'hw/s390-virtio.c') diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c index c36a8b2..898f442 100644 --- a/hw/s390-virtio.c +++ b/hw/s390-virtio.c @@ -52,6 +52,10 @@ #define INITRD_PARM_SIZE 0x010410UL #define PARMFILE_START 0x001000UL +#define ZIPL_START 0x009000UL +#define ZIPL_LOAD_ADDR 0x009000UL +#define ZIPL_FILENAME "s390-zipl.rom" + #define MAX_BLK_DEVS 10 static VirtIOS390Bus *s390_bus; @@ -188,6 +192,28 @@ static void s390_init(ram_addr_t ram_size, env->psw.addr = KERN_IMAGE_START; env->psw.mask = 0x0000000180000000ULL; + } else { + ram_addr_t bios_size = 0; + char *bios_filename; + + /* Load zipl bootloader */ + if (bios_name == NULL) { + bios_name = ZIPL_FILENAME; + } + + bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); + bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR)); + + if ((long)bios_size < 0) { + hw_error("could not load bootloader '%s'\n", bios_name); + } + + if (bios_size > 4096) { + hw_error("stage1 bootloader is > 4k\n"); + } + + env->psw.addr = ZIPL_START; + env->psw.mask = 0x0000000180000000ULL; } if (initrd_filename) { -- cgit v1.1