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 <s...@chromium.org>
---
arch/x86/cpu/ivybridge/gma.c | 3 ++-
drivers/pci/pci_rom.c | 32 +++++++++++++++++++++++++-------
drivers/video/vesa_fb.c | 6 +++---
include/pci_rom.h | 15 +++++++++++++--
4 files changed, 43 insertions(+), 13 deletions(-)
diff --git a/arch/x86/cpu/ivybridge/gma.c b/arch/x86/cpu/ivybridge/gma.c
index 6cf9654..821ea25 100644
--- a/arch/x86/cpu/ivybridge/gma.c
+++ b/arch/x86/cpu/ivybridge/gma.c
@@ -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 */
diff --git a/drivers/pci/pci_rom.c b/drivers/pci/pci_rom.c
index eb76591..0796179 100644
--- a/drivers/pci/pci_rom.c
+++ b/drivers/pci/pci_rom.c
@@ -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);
diff --git a/drivers/video/vesa_fb.c b/drivers/video/vesa_fb.c
index 3a0fea2..9164f8d 100644
--- a/drivers/video/vesa_fb.c
+++ b/drivers/video/vesa_fb.c
@@ -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;
}
diff --git a/include/pci_rom.h b/include/pci_rom.h
index 4ba36eb..d24c52a 100644
--- a/include/pci_rom.h
+++ b/include/pci_rom.h
@@ -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_t {
+ 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_t
*/
-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
--
2.2.0.rc0.207.ga3a616c
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