x86: qemu: Add graphics support
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>
diff --git a/arch/x86/cpu/qemu/pci.c b/arch/x86/cpu/qemu/pci.c
index d50ab75..ac9c056 100644
--- a/arch/x86/cpu/qemu/pci.c
+++ b/arch/x86/cpu/qemu/pci.c
@@ -6,6 +6,7 @@
#include <common.h>
#include <pci.h>
+#include <pci_rom.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -45,5 +46,26 @@
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;
}
diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig
index 53cb553..4509d52 100644
--- a/configs/qemu-x86_defconfig
+++ b/configs/qemu-x86_defconfig
@@ -5,3 +5,6 @@
CONFIG_OF_CONTROL=y
CONFIG_OF_SEPARATE=y
CONFIG_DEFAULT_DEVICE_TREE="qemu-x86"
+CONFIG_VIDEO_VESA=y
+CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
+CONFIG_FRAMEBUFFER_VESA_MODE_111=y
diff --git a/doc/README.x86 b/doc/README.x86
index 4a30f68..0726205 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -218,7 +218,8 @@
Test with QEMU
--------------
QEMU is a fancy emulator that can enable us to test U-Boot without access to
-a real x86 board. To launch QEMU with u-boot.rom, call QEMU as follows:
+a real x86 board. Please make sure your QEMU version is 2.3.0 or above test
+U-Boot. To launch QEMU with u-boot.rom, call QEMU as follows:
$ qemu-system-i386 -nographic -bios path/to/u-boot.rom
@@ -239,6 +240,10 @@
for PCI device memory-mapped I/O and other stuff, so the maximum value of '-m'
would be 3072.
+QEMU emulates a graphic card which U-Boot supports. Removing '-nographic' will
+show QEMU's VGA console window. Note this will disable QEMU's serial output.
+If you want to check both consoles, use '-serial stdio'.
+
CPU Microcode
-------------
Modern CPUs usually require a special bit stream called microcode [6] to be
diff --git a/include/configs/qemu-x86.h b/include/configs/qemu-x86.h
index bb3c085..e2a223f 100644
--- a/include/configs/qemu-x86.h
+++ b/include/configs/qemu-x86.h
@@ -32,9 +32,9 @@
#define CONFIG_PCI_PNP
#define CONFIG_E1000
-#define CONFIG_STD_DEVICES_SETTINGS "stdin=serial\0" \
- "stdout=serial\0" \
- "stderr=serial\0"
+#define CONFIG_STD_DEVICES_SETTINGS "stdin=serial,vga\0" \
+ "stdout=serial,vga\0" \
+ "stderr=serial,vga\0"
#define CONFIG_SCSI_DEV_LIST \
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1}
@@ -48,8 +48,4 @@
#undef CONFIG_ENV_IS_IN_SPI_FLASH
#define CONFIG_ENV_IS_NOWHERE
-/* Video is not supported */
-#undef CONFIG_VIDEO
-#undef CONFIG_CFB_CONSOLE
-
#endif /* __CONFIG_H */