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
---
Changes in v2: - Drop the patch that tries to clean up the CONFIG_VGA_AS_SINGLE_DEVICE wraps - Update README.x86 to mention QEMU version
arch/x86/cpu/qemu/pci.c | 24 +++++++++++++++++++++++- configs/qemu-x86_defconfig | 3 +++ doc/README.x86 | 7 ++++++- include/configs/qemu-x86.h | 10 +++------- 4 files changed, 35 insertions(+), 9 deletions(-)
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 @@ 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; } diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig index 9b02322..198ab97 100644 --- a/configs/qemu-x86_defconfig +++ b/configs/qemu-x86_defconfig @@ -4,3 +4,6 @@ CONFIG_TARGET_QEMU_X86=y 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 @@ works correctly for link though. 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 @@ supports 3 GiB maximum system memory and reserves the last 1 GiB address space 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 281aaa5..6467c38 100644 --- a/include/configs/qemu-x86.h +++ b/include/configs/qemu-x86.h @@ -36,9 +36,9 @@ #define CONFIG_E1000 #endif
-#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} @@ -52,8 +52,4 @@ #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 */