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x86: qemu: Add graphics support

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It turns out that QEMU x86 emulated graphic card has a built-in
option ROM which can be run perfectly with native mode by U-Boot.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng
2015-05-11 07:36:30 +08:00
committed by Simon Glass
parent 6bde2dc5e2
commit 9c4f541237
4 changed files with 35 additions and 9 deletions
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24
arch/x86/cpu/qemu/pci.c
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@@ -6,6 +6,7 @@
#include <common.h>
#include <pci.h>
#include <pci_rom.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -45,5 +46,26 @@ void board_pci_setup_hose(struct pci_controller *hose)
int board_pci_post_scan(struct pci_controller *hose)
{
return 0;
int ret = 0;
ulong start;
pci_dev_t bdf;
struct pci_device_id graphic_card[] = { { 0x1234, 0x1111 } };
/*
* QEMU emulated graphic card shows in the PCI configuration space with
* PCI vendor id and device id as an artificial pair 0x1234:0x1111.
* It is on PCI bus 0, function 0, but device number is not consistent
* for the two x86 targets it supports. For i440FX and PIIX chipset
* board, it shows as device 2, while for Q35 and ICH9 chipset board,
* it shows as device 1. Here we locate its bdf at run-time based on
* its vendor id and device id pair so we can support both boards.
*/
bdf = pci_find_devices(graphic_card, 0);
if (bdf != -1) {
start = get_timer(0);
ret = pci_run_vga_bios(bdf, NULL, PCI_ROM_USE_NATIVE);
debug("BIOS ran in %lums\n", get_timer(start));
}
return ret;
}