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x86: qemu: Adjust VGA initialization

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As VGA option rom needs to run at C segment, although QEMU PAM emulation
seems to only guard E/F segments, for correctness, move VGA initialization
after PAM decode C/D/E/F segments.

Also since we already tested QEMU targets to differentiate I440FX and Q35
platforms, change to locate the VGA device via hardcoded b.d.f instead of
dynamic search for its vendor id & device id pair.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-05-25 22:36:27 +08:00 committed by Simon Glass
parent 0fcb7acf67
commit 4be2f42bbc
2 changed files with 17 additions and 19 deletions
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34
arch/x86/cpu/qemu/pci.c
View file

@ -50,27 +50,10 @@ void board_pci_setup_hose(struct pci_controller *hose)
int board_pci_post_scan(struct pci_controller *hose)
{
int ret = 0;
ulong start;
pci_dev_t bdf;
struct pci_device_id graphic_card[] = { { 0x1234, 0x1111 } };
u16 device;
int pam, i;
/*
* 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));
}
pci_dev_t vga;
ulong start;
/*
* i440FX and Q35 chipset have different PAM register offset, but with
@ -101,5 +84,18 @@ int board_pci_post_scan(struct pci_controller *hose)
x86_pci_write_config16(PIIX_IDE, IDE1_TIM, IDE_DECODE_EN);
}
/*
* 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.
*/
vga = (device == PCI_DEVICE_ID_INTEL_82441) ? I440FX_VGA : Q35_VGA;
start = get_timer(0);
ret = pci_run_vga_bios(vga, NULL, PCI_ROM_USE_NATIVE);
debug("BIOS ran in %lums\n", get_timer(start));
return ret;
}

2
arch/x86/include/asm/arch-qemu/device.h
View file

@ -13,7 +13,9 @@
#define PIIX_ISA PCI_BDF(0, 1, 0)
#define PIIX_IDE PCI_BDF(0, 1, 1)
#define PIIX_USB PCI_BDF(0, 1, 2)
#define I440FX_VGA PCI_BDF(0, 2, 0)
#define QEMU_Q35 PCI_BDF(0, 0, 0)
#define Q35_VGA PCI_BDF(0, 1, 0)
#endif /* _QEMU_DEVICE_H_ */