avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/bios_emulator/atibios.c

@@ -0,0 +1,643 @@
+/****************************************************************************
+*
+*		     Video BOOT Graphics Card POST Module
+*
+*  ========================================================================
+*   Copyright (C) 2007 Freescale Semiconductor, Inc.
+*   Jason Jin <Jason.jin@freescale.com>
+*
+*   Copyright (C) 1991-2004 SciTech Software, Inc. All rights reserved.
+*
+*   This file may be distributed and/or modified under the terms of the
+*   GNU General Public License version 2.0 as published by the Free
+*   Software Foundation and appearing in the file LICENSE.GPL included
+*   in the packaging of this file.
+*
+*   Licensees holding a valid Commercial License for this product from
+*   SciTech Software, Inc. may use this file in accordance with the
+*   Commercial License Agreement provided with the Software.
+*
+*   This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
+*   THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+*   PURPOSE.
+*
+*   See http://www.scitechsoft.com/license/ for information about
+*   the licensing options available and how to purchase a Commercial
+*   License Agreement.
+*
+*   Contact license@scitechsoft.com if any conditions of this licensing
+*   are not clear to you, or you have questions about licensing options.
+*
+*  ========================================================================
+*
+* Language:	ANSI C
+* Environment:	Linux Kernel
+* Developer:	Kendall Bennett
+*
+* Description:	Module to implement booting PCI/AGP controllers on the
+*		bus. We use the x86 real mode emulator to run the BIOS on
+*		graphics controllers to bring the cards up.
+*
+*		Note that at present this module does *not* support
+*		multiple controllers.
+*
+*		The orignal name of this file is warmboot.c.
+*		Jason ported this file to u-boot to run the ATI video card
+*		BIOS in u-boot.
+****************************************************************************/
+#include <common.h>
+#include <bios_emul.h>
+#include <errno.h>
+#include <malloc.h>
+#include <vbe.h>
+#include "biosemui.h"
+
+/* Length of the BIOS image */
+#define MAX_BIOSLEN	    (128 * 1024L)
+
+/* Place to save PCI BAR's that we change and later restore */
+static u32 saveROMBaseAddress;
+static u32 saveBaseAddress10;
+static u32 saveBaseAddress14;
+static u32 saveBaseAddress18;
+static u32 saveBaseAddress20;
+
+/* Addres im memory of VBE region */
+const int vbe_offset = 0x2000;
+
+static const void *bios_ptr(const void *buf, BE_VGAInfo *vga_info,
+			    u32 x86_dword_ptr)
+{
+	u32 seg_ofs, flat;
+
+	seg_ofs = le32_to_cpu(x86_dword_ptr);
+	flat = ((seg_ofs & 0xffff0000) >> 12) | (seg_ofs & 0xffff);
+	if (flat >= 0xc0000)
+		return vga_info->BIOSImage + flat - 0xc0000;
+	else
+		return buf + (flat - vbe_offset);
+}
+
+static int atibios_debug_mode(BE_VGAInfo *vga_info, RMREGS *regs,
+			      int vesa_mode, struct vbe_mode_info *mode_info)
+{
+	void *buffer = (void *)(M.mem_base + vbe_offset);
+	u16 buffer_seg = (((unsigned long)vbe_offset) >> 4) & 0xff00;
+	u16 buffer_adr = ((unsigned long)vbe_offset) & 0xffff;
+	struct vesa_mode_info *vm;
+	struct vbe_info *info;
+	const u16 *modes_bios, *ptr;
+	u16 *modes;
+	int size;
+
+	debug("VBE: Getting information\n");
+	regs->e.eax = VESA_GET_INFO;
+	regs->e.esi = buffer_seg;
+	regs->e.edi = buffer_adr;
+	info = buffer;
+	memset(info, '\0', sizeof(*info));
+	strcpy(info->signature, "VBE2");
+	BE_int86(0x10, regs, regs);
+	if (regs->e.eax != 0x4f) {
+		debug("VESA_GET_INFO: error %x\n", regs->e.eax);
+		return -ENOSYS;
+	}
+	debug("version %x\n", le16_to_cpu(info->version));
+	debug("oem '%s'\n", (char *)bios_ptr(buffer, vga_info,
+					     info->oem_string_ptr));
+	debug("vendor '%s'\n", (char *)bios_ptr(buffer, vga_info,
+						info->vendor_name_ptr));
+	debug("product '%s'\n", (char *)bios_ptr(buffer, vga_info,
+						 info->product_name_ptr));
+	debug("rev '%s'\n", (char *)bios_ptr(buffer, vga_info,
+					     info->product_rev_ptr));
+	modes_bios = bios_ptr(buffer, vga_info, info->modes_ptr);
+	debug("Modes: ");
+	for (ptr = modes_bios; *ptr != 0xffff; ptr++)
+		debug("%x ", le16_to_cpu(*ptr));
+	debug("\nmemory %dMB\n", le16_to_cpu(info->total_memory) >> 4);
+	size = (ptr - modes_bios) * sizeof(u16) + 2;
+	modes = malloc(size);
+	if (!modes)
+		return -ENOMEM;
+	memcpy(modes, modes_bios, size);
+
+	regs->e.eax = VESA_GET_CUR_MODE;
+	BE_int86(0x10, regs, regs);
+	if (regs->e.eax != 0x4f) {
+		debug("VESA_GET_CUR_MODE: error %x\n", regs->e.eax);
+		return -ENOSYS;
+	}
+	debug("Current mode %x\n", regs->e.ebx);
+
+	for (ptr = modes; *ptr != 0xffff; ptr++) {
+		int mode = le16_to_cpu(*ptr);
+		bool linear_ok;
+		int attr;
+
+		break;
+		debug("Mode %x: ", mode);
+		memset(buffer, '\0', sizeof(struct vbe_mode_info));
+		regs->e.eax = VESA_GET_MODE_INFO;
+		regs->e.ebx = 0;
+		regs->e.ecx = mode;
+		regs->e.edx = 0;
+		regs->e.esi = buffer_seg;
+		regs->e.edi = buffer_adr;
+		BE_int86(0x10, regs, regs);
+		if (regs->e.eax != 0x4f) {
+			debug("VESA_GET_MODE_INFO: error %x\n", regs->e.eax);
+			continue;
+		}
+		memcpy(mode_info->mode_info_block, buffer,
+		       sizeof(struct vesa_mode_info));
+		mode_info->valid = true;
+		vm = &mode_info->vesa;
+		attr = le16_to_cpu(vm->mode_attributes);
+		linear_ok = attr & 0x80;
+		debug("res %d x %d, %d bpp, mm %d, (Linear %s, attr %02x)\n",
+		      le16_to_cpu(vm->x_resolution),
+		      le16_to_cpu(vm->y_resolution),
+		      vm->bits_per_pixel, vm->memory_model,
+		      linear_ok ? "OK" : "not available",
+		      attr);
+		debug("\tRGB pos=%d,%d,%d, size=%d,%d,%d\n",
+		      vm->red_mask_pos, vm->green_mask_pos, vm->blue_mask_pos,
+		      vm->red_mask_size, vm->green_mask_size,
+		      vm->blue_mask_size);
+	}
+
+	return 0;
+}
+
+static int atibios_set_vesa_mode(RMREGS *regs, int vesa_mode,
+				 struct vbe_mode_info *mode_info)
+{
+	void *buffer = (void *)(M.mem_base + vbe_offset);
+	u16 buffer_seg = (((unsigned long)vbe_offset) >> 4) & 0xff00;
+	u16 buffer_adr = ((unsigned long)vbe_offset) & 0xffff;
+	struct vesa_mode_info *vm;
+
+	debug("VBE: Setting VESA mode %#04x\n", vesa_mode);
+	regs->e.eax = VESA_SET_MODE;
+	regs->e.ebx = vesa_mode;
+	/* request linear framebuffer mode and don't clear display */
+	regs->e.ebx |= (1 << 14) | (1 << 15);
+	BE_int86(0x10, regs, regs);
+	if (regs->e.eax != 0x4f) {
+		debug("VESA_SET_MODE: error %x\n", regs->e.eax);
+		return -ENOSYS;
+	}
+
+	memset(buffer, '\0', sizeof(struct vbe_mode_info));
+	debug("VBE: Geting info for VESA mode %#04x\n", vesa_mode);
+	regs->e.eax = VESA_GET_MODE_INFO;
+	regs->e.ecx = vesa_mode;
+	regs->e.esi = buffer_seg;
+	regs->e.edi = buffer_adr;
+	BE_int86(0x10, regs, regs);
+	if (regs->e.eax != 0x4f) {
+		debug("VESA_GET_MODE_INFO: error %x\n", regs->e.eax);
+		return -ENOSYS;
+	}
+
+	memcpy(mode_info->mode_info_block, buffer,
+		sizeof(struct vesa_mode_info));
+	mode_info->valid = true;
+	mode_info->video_mode = vesa_mode;
+	vm = &mode_info->vesa;
+	vm->x_resolution = le16_to_cpu(vm->x_resolution);
+	vm->y_resolution = le16_to_cpu(vm->y_resolution);
+	vm->bytes_per_scanline = le16_to_cpu(vm->bytes_per_scanline);
+	vm->phys_base_ptr = le32_to_cpu(vm->phys_base_ptr);
+	vm->mode_attributes = le16_to_cpu(vm->mode_attributes);
+	debug("VBE: Init complete\n");
+
+	return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+pcidev	- PCI device info for the video card on the bus to boot
+vga_info - BIOS emulator VGA info structure
+
+REMARKS:
+This function executes the BIOS POST code on the controller. We assume that
+at this stage the controller has its I/O and memory space enabled and
+that all other controllers are in a disabled state.
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+static void PCI_doBIOSPOST(struct udevice *pcidev, BE_VGAInfo *vga_info,
+			   int vesa_mode, struct vbe_mode_info *mode_info)
+#else
+static void PCI_doBIOSPOST(pci_dev_t pcidev, BE_VGAInfo *vga_info,
+			   int vesa_mode, struct vbe_mode_info *mode_info)
+#endif
+{
+	RMREGS regs;
+	RMSREGS sregs;
+#ifdef CONFIG_DM_PCI
+	pci_dev_t bdf;
+#endif
+
+	/* Determine the value to store in AX for BIOS POST. Per the PCI specs,
+	 AH must contain the bus and AL must contain the devfn, encoded as
+	 (dev << 3) | fn
+	 */
+	memset(&regs, 0, sizeof(regs));
+	memset(&sregs, 0, sizeof(sregs));
+#ifdef CONFIG_DM_PCI
+	bdf = dm_pci_get_bdf(pcidev);
+	regs.x.ax = (int)PCI_BUS(bdf) << 8 |
+			(int)PCI_DEV(bdf) << 3 | (int)PCI_FUNC(bdf);
+#else
+	regs.x.ax = ((int)PCI_BUS(pcidev) << 8) |
+	    ((int)PCI_DEV(pcidev) << 3) | (int)PCI_FUNC(pcidev);
+#endif
+	/*Setup the X86 emulator for the VGA BIOS*/
+	BE_setVGA(vga_info);
+
+	/*Execute the BIOS POST code*/
+	BE_callRealMode(0xC000, 0x0003, &regs, &sregs);
+
+	/*Cleanup and exit*/
+	BE_getVGA(vga_info);
+
+	/* Useful for debugging */
+	if (0)
+		atibios_debug_mode(vga_info, &regs, vesa_mode, mode_info);
+	if (vesa_mode != -1)
+		atibios_set_vesa_mode(&regs, vesa_mode, mode_info);
+}
+
+/****************************************************************************
+PARAMETERS:
+pcidev	- PCI device info for the video card on the bus
+bar	- Place to return the base address register offset to use
+
+RETURNS:
+The address to use to map the secondary BIOS (AGP devices)
+
+REMARKS:
+Searches all the PCI base address registers for the device looking for a
+memory mapping that is large enough to hold our ROM BIOS. We usually end up
+finding the framebuffer mapping (usually BAR 0x10), and we use this mapping
+to map the BIOS for the device into. We use a mapping that is already
+assigned to the device to ensure the memory range will be passed through
+by any PCI->PCI or AGP->PCI bridge that may be present.
+
+NOTE: Usually this function is only used for AGP devices, but it may be
+      used for PCI devices that have already been POST'ed and the BIOS
+      ROM base address has been zero'ed out.
+
+NOTE: This function leaves the original memory aperture disabled by leaving
+      it programmed to all 1's. It must be restored to the correct value
+      later.
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+static u32 PCI_findBIOSAddr(struct udevice *pcidev, int *bar)
+#else
+static u32 PCI_findBIOSAddr(pci_dev_t pcidev, int *bar)
+#endif
+{
+	u32 base, size;
+
+	for (*bar = 0x10; *bar <= 0x14; (*bar) += 4) {
+#ifdef CONFIG_DM_PCI
+		dm_pci_read_config32(pcidev, *bar, &base);
+#else
+		pci_read_config_dword(pcidev, *bar, &base);
+#endif
+		if (!(base & 0x1)) {
+#ifdef CONFIG_DM_PCI
+			dm_pci_write_config32(pcidev, *bar, 0xFFFFFFFF);
+			dm_pci_read_config32(pcidev, *bar, &size);
+#else
+			pci_write_config_dword(pcidev, *bar, 0xFFFFFFFF);
+			pci_read_config_dword(pcidev, *bar, &size);
+#endif
+			size = ~(size & ~0xFF) + 1;
+			if (size >= MAX_BIOSLEN)
+				return base & ~0xFF;
+		}
+	}
+	return 0;
+}
+
+/****************************************************************************
+REMARKS:
+Some non-x86 Linux kernels map PCI relocateable I/O to values that
+are above 64K, which will not work with the BIOS image that requires
+the offset for the I/O ports to be a maximum of 16-bits. Ideally
+someone should fix the kernel to map the I/O ports for VGA compatible
+devices to a different location (or just all I/O ports since it is
+unlikely you can have enough devices in the machine to use up all
+64K of the I/O space - a total of more than 256 cards would be
+necessary).
+
+Anyway to fix this we change all I/O mapped base registers and
+chop off the top bits.
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+static void PCI_fixupIObase(struct udevice *pcidev, int reg, u32 *base)
+#else
+static void PCI_fixupIObase(pci_dev_t pcidev, int reg, u32 * base)
+#endif
+{
+	if ((*base & 0x1) && (*base > 0xFFFE)) {
+		*base &= 0xFFFF;
+#ifdef CONFIG_DM_PCI
+		dm_pci_write_config32(pcidev, reg, *base);
+#else
+		pci_write_config_dword(pcidev, reg, *base);
+#endif
+
+	}
+}
+
+/****************************************************************************
+PARAMETERS:
+pcidev	- PCI device info for the video card on the bus
+
+RETURNS:
+Pointers to the mapped BIOS image
+
+REMARKS:
+Maps a pointer to the BIOS image on the graphics card on the PCI bus.
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+void *PCI_mapBIOSImage(struct udevice *pcidev)
+#else
+void *PCI_mapBIOSImage(pci_dev_t pcidev)
+#endif
+{
+	u32 BIOSImageBus;
+	int BIOSImageBAR;
+	u8 *BIOSImage;
+
+	/*Save PCI BAR registers that might get changed*/
+#ifdef CONFIG_DM_PCI
+	dm_pci_read_config32(pcidev, PCI_ROM_ADDRESS, &saveROMBaseAddress);
+	dm_pci_read_config32(pcidev, PCI_BASE_ADDRESS_0, &saveBaseAddress10);
+	dm_pci_read_config32(pcidev, PCI_BASE_ADDRESS_1, &saveBaseAddress14);
+	dm_pci_read_config32(pcidev, PCI_BASE_ADDRESS_2, &saveBaseAddress18);
+	dm_pci_read_config32(pcidev, PCI_BASE_ADDRESS_4, &saveBaseAddress20);
+#else
+	pci_read_config_dword(pcidev, PCI_ROM_ADDRESS, &saveROMBaseAddress);
+	pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_0, &saveBaseAddress10);
+	pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_1, &saveBaseAddress14);
+	pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_2, &saveBaseAddress18);
+	pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_4, &saveBaseAddress20);
+#endif
+
+	/*Fix up I/O base registers to less than 64K */
+	if(saveBaseAddress14 != 0)
+		PCI_fixupIObase(pcidev, PCI_BASE_ADDRESS_1, &saveBaseAddress14);
+	else
+		PCI_fixupIObase(pcidev, PCI_BASE_ADDRESS_4, &saveBaseAddress20);
+
+	/* Some cards have problems that stop us from being able to read the
+	 BIOS image from the ROM BAR. To fix this we have to do some chipset
+	 specific programming for different cards to solve this problem.
+	*/
+
+	BIOSImageBus = PCI_findBIOSAddr(pcidev, &BIOSImageBAR);
+	if (BIOSImageBus == 0) {
+		printf("Find bios addr error\n");
+		return NULL;
+	}
+
+#ifdef CONFIG_DM_PCI
+	BIOSImage = dm_pci_bus_to_virt(pcidev, BIOSImageBus,
+				       PCI_REGION_MEM, 0, MAP_NOCACHE);
+
+	/*Change the PCI BAR registers to map it onto the bus.*/
+	dm_pci_write_config32(pcidev, BIOSImageBAR, 0);
+	dm_pci_write_config32(pcidev, PCI_ROM_ADDRESS, BIOSImageBus | 0x1);
+#else
+	BIOSImage = pci_bus_to_virt(pcidev, BIOSImageBus,
+				    PCI_REGION_MEM, 0, MAP_NOCACHE);
+
+	/*Change the PCI BAR registers to map it onto the bus.*/
+	pci_write_config_dword(pcidev, BIOSImageBAR, 0);
+	pci_write_config_dword(pcidev, PCI_ROM_ADDRESS, BIOSImageBus | 0x1);
+#endif
+	udelay(1);
+
+	/*Check that the BIOS image is valid. If not fail, or return the
+	 compiled in BIOS image if that option was enabled
+	 */
+	if (BIOSImage[0] != 0x55 || BIOSImage[1] != 0xAA || BIOSImage[2] == 0) {
+		return NULL;
+	}
+
+	return BIOSImage;
+}
+
+/****************************************************************************
+PARAMETERS:
+pcidev	- PCI device info for the video card on the bus
+
+REMARKS:
+Unmaps the BIOS image for the device and restores framebuffer mappings
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+void PCI_unmapBIOSImage(struct udevice *pcidev, void *BIOSImage)
+{
+	dm_pci_write_config32(pcidev, PCI_ROM_ADDRESS, saveROMBaseAddress);
+	dm_pci_write_config32(pcidev, PCI_BASE_ADDRESS_0, saveBaseAddress10);
+	dm_pci_write_config32(pcidev, PCI_BASE_ADDRESS_1, saveBaseAddress14);
+	dm_pci_write_config32(pcidev, PCI_BASE_ADDRESS_2, saveBaseAddress18);
+	dm_pci_write_config32(pcidev, PCI_BASE_ADDRESS_4, saveBaseAddress20);
+}
+#else
+void PCI_unmapBIOSImage(pci_dev_t pcidev, void *BIOSImage)
+{
+	pci_write_config_dword(pcidev, PCI_ROM_ADDRESS, saveROMBaseAddress);
+	pci_write_config_dword(pcidev, PCI_BASE_ADDRESS_0, saveBaseAddress10);
+	pci_write_config_dword(pcidev, PCI_BASE_ADDRESS_1, saveBaseAddress14);
+	pci_write_config_dword(pcidev, PCI_BASE_ADDRESS_2, saveBaseAddress18);
+	pci_write_config_dword(pcidev, PCI_BASE_ADDRESS_4, saveBaseAddress20);
+}
+#endif
+
+/****************************************************************************
+PARAMETERS:
+pcidev	- PCI device info for the video card on the bus to boot
+VGAInfo - BIOS emulator VGA info structure
+
+RETURNS:
+true if successfully initialised, false if not.
+
+REMARKS:
+Loads and POST's the display controllers BIOS, directly from the BIOS
+image we can extract over the PCI bus.
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+static int PCI_postController(struct udevice *pcidev, uchar *bios_rom,
+			      int bios_len, BE_VGAInfo *vga_info,
+			      int vesa_mode, struct vbe_mode_info *mode_info)
+#else
+static int PCI_postController(pci_dev_t pcidev, uchar *bios_rom, int bios_len,
+			      BE_VGAInfo *vga_info, int vesa_mode,
+			      struct vbe_mode_info *mode_info)
+#endif
+{
+	u32 bios_image_len;
+	uchar *mapped_bios;
+	uchar *copy_of_bios;
+#ifdef CONFIG_DM_PCI
+	pci_dev_t bdf;
+#endif
+
+	if (bios_rom) {
+		copy_of_bios = bios_rom;
+		bios_image_len = bios_len;
+	} else {
+		/*
+		 * Allocate memory to store copy of BIOS from display
+		 * controller
+		 */
+		mapped_bios = PCI_mapBIOSImage(pcidev);
+		if (mapped_bios == NULL) {
+			printf("videoboot: Video ROM failed to map!\n");
+			return false;
+		}
+
+		bios_image_len = mapped_bios[2] * 512;
+
+		copy_of_bios = malloc(bios_image_len);
+		if (copy_of_bios == NULL) {
+			printf("videoboot: Out of memory!\n");
+			return false;
+		}
+		memcpy(copy_of_bios, mapped_bios, bios_image_len);
+		PCI_unmapBIOSImage(pcidev, mapped_bios);
+	}
+
+	/*Save information in vga_info structure*/
+#ifdef CONFIG_DM_PCI
+	bdf = dm_pci_get_bdf(pcidev);
+	vga_info->function = PCI_FUNC(bdf);
+	vga_info->device = PCI_DEV(bdf);
+	vga_info->bus = PCI_BUS(bdf);
+#else
+	vga_info->function = PCI_FUNC(pcidev);
+	vga_info->device = PCI_DEV(pcidev);
+	vga_info->bus = PCI_BUS(pcidev);
+#endif
+	vga_info->pcidev = pcidev;
+	vga_info->BIOSImage = copy_of_bios;
+	vga_info->BIOSImageLen = bios_image_len;
+
+	/*Now execute the BIOS POST for the device*/
+	if (copy_of_bios[0] != 0x55 || copy_of_bios[1] != 0xAA) {
+		printf("videoboot: Video ROM image is invalid!\n");
+		return false;
+	}
+
+	PCI_doBIOSPOST(pcidev, vga_info, vesa_mode, mode_info);
+
+	/*Reset the size of the BIOS image to the final size*/
+	vga_info->BIOSImageLen = copy_of_bios[2] * 512;
+	return true;
+}
+
+#ifdef CONFIG_DM_PCI
+int biosemu_setup(struct udevice *pcidev, BE_VGAInfo **vga_infop)
+#else
+int biosemu_setup(pci_dev_t pcidev, BE_VGAInfo **vga_infop)
+#endif
+{
+	BE_VGAInfo *VGAInfo;
+#ifdef CONFIG_DM_PCI
+	pci_dev_t bdf = dm_pci_get_bdf(pcidev);
+
+	printf("videoboot: Booting PCI video card bus %d, function %d, device %d\n",
+	       PCI_BUS(bdf), PCI_FUNC(bdf), PCI_DEV(bdf));
+#else
+	printf("videoboot: Booting PCI video card bus %d, function %d, device %d\n",
+	       PCI_BUS(pcidev), PCI_FUNC(pcidev), PCI_DEV(pcidev));
+#endif
+	/*Initialise the x86 BIOS emulator*/
+	if ((VGAInfo = malloc(sizeof(*VGAInfo))) == NULL) {
+		printf("videoboot: Out of memory!\n");
+		return -ENOMEM;
+	}
+	memset(VGAInfo, 0, sizeof(*VGAInfo));
+	BE_init(0, 65536, VGAInfo, 0);
+	*vga_infop = VGAInfo;
+
+	return 0;
+}
+
+void biosemu_set_interrupt_handler(int intnum, int (*int_func)(void))
+{
+	X86EMU_setupIntrFunc(intnum, (X86EMU_intrFuncs)int_func);
+}
+
+#ifdef CONFIG_DM_PCI
+int biosemu_run(struct udevice *pcidev, uchar *bios_rom, int bios_len,
+		BE_VGAInfo *vga_info, int clean_up, int vesa_mode,
+		struct vbe_mode_info *mode_info)
+#else
+int biosemu_run(pci_dev_t pcidev, uchar *bios_rom, int bios_len,
+		BE_VGAInfo *vga_info, int clean_up, int vesa_mode,
+		struct vbe_mode_info *mode_info)
+#endif
+{
+	/*Post all the display controller BIOS'es*/
+	if (!PCI_postController(pcidev, bios_rom, bios_len, vga_info,
+				vesa_mode, mode_info))
+		return -EINVAL;
+
+	/*
+	 * Cleanup and exit the emulator if requested. If the BIOS emulator
+	 * is needed after booting the card, we will not call BE_exit and
+	 * leave it enabled for further use (ie: VESA driver etc).
+	*/
+	if (clean_up) {
+		BE_exit();
+		if (vga_info->BIOSImage &&
+		    (u32)(vga_info->BIOSImage) != 0xc0000)
+			free(vga_info->BIOSImage);
+		free(vga_info);
+		vga_info = NULL;
+	}
+
+	return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+pcidev	    - PCI device info for the video card on the bus to boot
+pVGAInfo    - Place to return VGA info structure is requested
+cleanUp	    - true to clean up on exit, false to leave emulator active
+
+REMARKS:
+Boots the PCI/AGP video card on the bus using the Video ROM BIOS image
+and the X86 BIOS emulator module.
+****************************************************************************/
+#ifdef CONFIG_DM_PCI
+int BootVideoCardBIOS(struct udevice *pcidev, BE_VGAInfo **pVGAInfo,
+		      int clean_up)
+#else
+int BootVideoCardBIOS(pci_dev_t pcidev, BE_VGAInfo **pVGAInfo, int clean_up)
+#endif
+{
+	BE_VGAInfo *VGAInfo;
+	int ret;
+
+	ret = biosemu_setup(pcidev, &VGAInfo);
+	if (ret)
+		return false;
+	ret = biosemu_run(pcidev, NULL, 0, VGAInfo, clean_up, -1, NULL);
+	if (ret)
+		return false;
+
+	/* Return VGA info pointer if the caller requested it*/
+	if (pVGAInfo)
+		*pVGAInfo = VGAInfo;
+
+	return true;
+}