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x86: video: Allow video ROM execution to fall back to the other method

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If the BIOS emulator is not available, allow use of native execution if
available, and vice versa. This can be controlled by the caller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-01-27 22:13:34 -07:00
parent 2d934e5703
commit bc17d8f4ac
4 changed files with 43 additions and 13 deletions
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3
arch/x86/cpu/ivybridge/gma.c
View file

@ -758,7 +758,8 @@ int gma_func0_init(pci_dev_t dev, struct pci_controller *hose,
#ifdef CONFIG_VIDEO
start = get_timer(0);
ret = pci_run_vga_bios(dev, int15_handler, false);
ret = pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE |
PCI_ROM_ALLOW_FALLBACK);
debug("BIOS ran in %lums\n", get_timer(start));
#endif
/* Post VBIOS init */

32
drivers/pci/pci_rom.c
View file

@ -228,11 +228,12 @@ int vbe_get_video_info(struct graphic_device *gdev)
#endif
}
int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), bool emulate)
int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method)
{
struct pci_rom_header *rom, *ram;
int vesa_mode = -1;
uint16_t class;
bool emulate;
int ret;
/* Only execute VGA ROMs */
@ -262,6 +263,29 @@ int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), bool emulate)
vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
#endif
debug("Selected vesa mode %#x\n", vesa_mode);
if (exec_method & PCI_ROM_USE_NATIVE) {
#ifdef CONFIG_X86
emulate = false;
#else
if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
printf("BIOS native execution is only available on x86\n");
return -ENOSYS;
}
emulate = true;
#endif
} else {
#ifdef CONFIG_BIOSEMU
emulate = true;
#else
if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
return -ENOSYS;
}
emulate = false;
#endif
}
if (emulate) {
#ifdef CONFIG_BIOSEMU
BE_VGAInfo *info;
@ -274,9 +298,6 @@ int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), bool emulate)
vesa_mode, &mode_info);
if (ret)
return ret;
#else
printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
return -ENOSYS;
#endif
} else {
#ifdef CONFIG_X86
@ -284,9 +305,6 @@ int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), bool emulate)
bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
&mode_info);
#else
printf("BIOS native execution is only available on x86\n");
return -ENOSYS;
#endif
}
debug("Final vesa mode %#x\n", mode_info.video_mode);

6
drivers/video/vesa_fb.c
View file

@ -42,8 +42,8 @@ void *video_hw_init(void)
printf("no card detected\n");
return NULL;
}
printf("bdf %x\n", dev);
ret = pci_run_vga_bios(dev, NULL, true);
ret = pci_run_vga_bios(dev, NULL, PCI_ROM_USE_NATIVE |
PCI_ROM_ALLOW_FALLBACK);
if (ret) {
printf("failed to run video BIOS: %d\n", ret);
return NULL;
@ -59,7 +59,7 @@ void *video_hw_init(void)
sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
bits_per_pixel);
printf("%s\n", gdev->modeIdent);
debug("Framex buffer at %x\n", gdev->pciBase);
debug("Frame buffer at %x\n", gdev->pciBase);
return (void *)gdev;
}

15
include/pci_rom.h
View file

@ -33,14 +33,25 @@ struct pci_rom_data {
uint16_t reserved_2;
};
/*
* Determines which execution method is used and whether we allow falling back
* to the other if the requested method is not available.
*/
enum pci_rom_emul {
PCI_ROM_EMULATE = 0 << 0,
PCI_ROM_USE_NATIVE = 1 << 0,
PCI_ROM_ALLOW_FALLBACK = 1 << 1,
};
/**
* pci_run_vga_bios() - Run the VGA BIOS in an x86 PC
*
* @dev: Video device containing the BIOS
* @int15_handler: Function to call to handle int 0x15
* @emulate: true to use the x86 emulator, false to run native
* @exec_method: flags from enum pci_rom_emul
*/
int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), bool emulate);
int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void),
int exec_method);
/**
* board_map_oprom_vendev() - map several PCI IDs to the one the ROM expects