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hw/arm/virt: Provide flash devices for boot ROMs
Add two flash devices to the virt board, so that it can be used for running guests which want a bootrom image such as UEFI. We provide two flash devices to make it more convenient to provide both a read-only UEFI image and a read-write place to store guest-set UEFI config variables. The '-bios' command line option is set up to provide an image for the first of the two flash devices. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1409930126-28449-2-git-send-email-ard.biesheuvel@linaro.org
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@ -37,6 +37,7 @@
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#include "sysemu/sysemu.h"
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#include "sysemu/kvm.h"
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#include "hw/boards.h"
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#include "hw/loader.h"
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#include "exec/address-spaces.h"
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#include "qemu/bitops.h"
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#include "qemu/error-report.h"
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@ -439,6 +440,73 @@ static void create_virtio_devices(const VirtBoardInfo *vbi, qemu_irq *pic)
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}
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}
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static void create_one_flash(const char *name, hwaddr flashbase,
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hwaddr flashsize)
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{
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/* Create and map a single flash device. We use the same
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* parameters as the flash devices on the Versatile Express board.
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*/
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DriveInfo *dinfo = drive_get_next(IF_PFLASH);
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DeviceState *dev = qdev_create(NULL, "cfi.pflash01");
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const uint64_t sectorlength = 256 * 1024;
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if (dinfo && qdev_prop_set_drive(dev, "drive", dinfo->bdrv)) {
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abort();
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}
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qdev_prop_set_uint32(dev, "num-blocks", flashsize / sectorlength);
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qdev_prop_set_uint64(dev, "sector-length", sectorlength);
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qdev_prop_set_uint8(dev, "width", 4);
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qdev_prop_set_uint8(dev, "device-width", 2);
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qdev_prop_set_uint8(dev, "big-endian", 0);
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qdev_prop_set_uint16(dev, "id0", 0x89);
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qdev_prop_set_uint16(dev, "id1", 0x18);
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qdev_prop_set_uint16(dev, "id2", 0x00);
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qdev_prop_set_uint16(dev, "id3", 0x00);
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qdev_prop_set_string(dev, "name", name);
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qdev_init_nofail(dev);
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sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, flashbase);
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}
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static void create_flash(const VirtBoardInfo *vbi)
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{
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/* Create two flash devices to fill the VIRT_FLASH space in the memmap.
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* Any file passed via -bios goes in the first of these.
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*/
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hwaddr flashsize = vbi->memmap[VIRT_FLASH].size / 2;
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hwaddr flashbase = vbi->memmap[VIRT_FLASH].base;
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char *nodename;
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if (bios_name) {
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const char *fn;
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if (drive_get(IF_PFLASH, 0, 0)) {
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error_report("The contents of the first flash device may be "
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"specified with -bios or with -drive if=pflash... "
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"but you cannot use both options at once");
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exit(1);
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}
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fn = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
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if (!fn || load_image_targphys(fn, flashbase, flashsize) < 0) {
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error_report("Could not load ROM image '%s'", bios_name);
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exit(1);
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}
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}
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create_one_flash("virt.flash0", flashbase, flashsize);
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create_one_flash("virt.flash1", flashbase + flashsize, flashsize);
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nodename = g_strdup_printf("/flash@%" PRIx64, flashbase);
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qemu_fdt_add_subnode(vbi->fdt, nodename);
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qemu_fdt_setprop_string(vbi->fdt, nodename, "compatible", "cfi-flash");
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qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg",
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2, flashbase, 2, flashsize,
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2, flashbase + flashsize, 2, flashsize);
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qemu_fdt_setprop_cell(vbi->fdt, nodename, "bank-width", 4);
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g_free(nodename);
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}
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static void *machvirt_dtb(const struct arm_boot_info *binfo, int *fdt_size)
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{
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const VirtBoardInfo *board = (const VirtBoardInfo *)binfo;
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@ -516,6 +584,8 @@ static void machvirt_init(MachineState *machine)
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vmstate_register_ram_global(ram);
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memory_region_add_subregion(sysmem, vbi->memmap[VIRT_MEM].base, ram);
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create_flash(vbi);
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create_gic(vbi, pic);
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create_uart(vbi, pic);
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