* Patch by Marc Singer, 29 May 2003:

  Fixed rarp boot method for IA32 and other little-endian CPUs.

* Patch by Marc Singer, 28 May 2003:
  Added port I/O commands.

* Patch by Matthew McClintock, 28 May 2003
  - cpu/mpc824x/start.S: fix relocation code when booting from RAM
  - minor patches for utx8245

* Patch by Daniel Engström, 28 May 2003:
  x86 update

* Patch by Dave Ellis, 9 May 2003 + 27 May 2003:
  add nand flash support to SXNI855T configuration
  fix/extend nand flash support:
  - fix 'nand erase' command so does not erase bad blocks
  - fix 'nand write' command so does not write to bad blocks
  - fix nand_probe() so handles no flash detected properly
  - add doc/README.nand
  - add .jffs2 and .oob options to nand read/write
  - add 'nand bad' command to list bad blocks
  - add 'clean' option to 'nand erase' to write JFFS2 clean markers
  - make NAND read/write faster

* Patch by Rune Torgersen, 23 May 2003:
  Update for MPC8266ADS board

1 files changed, 221 insertions, 0 deletions

diff --git a/lib_i386/video_bios.c b/lib_i386/video_bios.c
new file mode 100644
index 0000000..d9709b9
--- /dev/null
+++ b/lib_i386/video_bios.c
@@ -0,0 +1,221 @@
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h> 
+#include <pci.h> 
+#include <malloc.h> 
+#include <asm/ptrace.h> 
+#include <asm/realmode.h> 
+#include <asm/io.h> 
+#include <asm/pci.h> 
+
+#undef PCI_BIOS_DEBUG
+#undef VGA_BIOS_DEBUG
+
+#ifdef	VGA_BIOS_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+#ifdef CONFIG_PCI
+
+#ifdef PCI_BIOS_DEBUG
+#define RELOC_16(seg, off) *(u32*)(seg << 4 | (u32)&off) 
+extern u32 num_pci_bios_present;
+extern u32 num_pci_bios_find_device;
+extern u32 num_pci_bios_find_class;
+extern u32 num_pci_bios_generate_special_cycle;
+extern u32 num_pci_bios_read_cfg_byte;
+extern u32 num_pci_bios_read_cfg_word;
+extern u32 num_pci_bios_read_cfg_dword;
+extern u32 num_pci_bios_write_cfg_byte;
+extern u32 num_pci_bios_write_cfg_word;
+extern u32 num_pci_bios_write_cfg_dword;
+extern u32 num_pci_bios_get_irq_routing;
+extern u32 num_pci_bios_set_irq;
+extern u32 num_pci_bios_unknown_function;
+
+void print_bios_bios_stat(void)
+{
+	printf("16 bit functions:\n");
+	printf("pci_bios_present:                %d\n", RELOC_16(0xf000, num_pci_bios_present));
+	printf("pci_bios_find_device:            %d\n", RELOC_16(0xf000, num_pci_bios_find_device));
+	printf("pci_bios_find_class:             %d\n", RELOC_16(0xf000, num_pci_bios_find_class));
+	printf("pci_bios_generate_special_cycle: %d\n", RELOC_16(0xf000, num_pci_bios_generate_special_cycle));	
+	printf("pci_bios_read_cfg_byte:          %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_byte));
+	printf("pci_bios_read_cfg_word:          %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_word));
+	printf("pci_bios_read_cfg_dword:         %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_dword));
+	printf("pci_bios_write_cfg_byte:         %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_byte));
+	printf("pci_bios_write_cfg_word:         %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_word));
+	printf("pci_bios_write_cfg_dword:        %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_dword));
+	printf("pci_bios_get_irq_routing:        %d\n", RELOC_16(0xf000, num_pci_bios_get_irq_routing));
+	printf("pci_bios_set_irq:                %d\n", RELOC_16(0xf000, num_pci_bios_set_irq));
+	printf("pci_bios_unknown_function:       %d\n", RELOC_16(0xf000, num_pci_bios_unknown_function));
+
+}
+#endif
+
+#define PCI_CLASS_VIDEO             3
+#define PCI_CLASS_VIDEO_STD         0
+#define PCI_CLASS_VIDEO_PROG_IF_VGA 0
+
+
+static u32 probe_pci_video(void)
+{
+	pci_dev_t devbusfn;
+	
+	if ((devbusfn = pci_find_class(PCI_CLASS_VIDEO, 
+				       PCI_CLASS_VIDEO_STD, 
+				       PCI_CLASS_VIDEO_PROG_IF_VGA, 0)) != -1) {
+		u32 old;
+		u32 addr;
+		
+		/* PCI video device detected */
+		printf("Found PCI VGA device at %02x.%02x.%x\n", 
+		       PCI_BUS(devbusfn), PCI_DEV(devbusfn), PCI_FUNC(devbusfn));
+		
+		/* Enable I/O decoding as well, PCI viudeo boards
+		 * support I/O accesses, but they provide no
+		 * bar register for this since the ports are fixed.
+		 */
+		pci_write_config_word(devbusfn, PCI_COMMAND, PCI_COMMAND_MEMORY | PCI_COMMAND_IO | PCI_COMMAND_MASTER);
+		
+		/* Test the ROM decoder, do the device support a rom? */
+		pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &old);		
+		pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, PCI_ROM_ADDRESS_MASK);
+		pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &addr);
+		pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, old);
+				
+		if (!addr) {
+			printf("PCI VGA have no ROM?\n");
+			return 0;
+		}
+		
+		/* device have a rom */
+		if (pci_shadow_rom(devbusfn, (void*)0xc0000)) { 
+			printf("Shadowing of PCI VGA BIOS failed\n");
+			return 0;
+		}
+		
+		/* Now enable lagacy VGA port access */
+		if (pci_enable_legacy_video_ports(pci_bus_to_hose(PCI_BUS(devbusfn)))) {
+			printf("PCI VGA enable failed\n");
+			return 0;
+		}
+				
+	
+		/* return the pci device info, that we'll need later */
+		return PCI_BUS(devbusfn) << 8 | 
+			PCI_DEV(devbusfn) << 3 | (PCI_FUNC(devbusfn)&7);
+	}
+	
+	return 0;
+}
+
+
+#endif
+
+static int probe_isa_video(void)
+{
+	u32 ptr;
+	char *buf;	
+	
+	if (0 == (ptr = isa_map_rom(0xc0000, 0x8000))) {
+		return -1;
+	}
+	if (NULL == (buf=malloc(0x8000))) {
+		isa_unmap_rom(ptr);
+		return -1;
+	}
+	if (readw(ptr) != 0xaa55) {
+		free(buf);
+		isa_unmap_rom(ptr);
+		return -1;
+	}
+	
+	/* shadow the rom */
+	memcpy(buf, (void*)ptr, 0x8000);
+	isa_unmap_rom(ptr);
+	memcpy((void*)0xc0000, buf, 0x8000);
+	
+	free(buf);
+	
+	return 0;
+}
+
+int video_bios_init(void)
+{
+	struct pt_regs regs;
+
+	/* clear the video bios area in case we warmbooted */
+	memset((void*)0xc0000, 0, 0x8000);	
+	memset(&regs, 0, sizeof(struct pt_regs));
+	
+	if (probe_isa_video()) {
+		/* No ISA board found, try the PCI bus */
+		regs.eax = probe_pci_video();
+	}
+	
+	/* Did we succeed in mapping any video bios */
+	if (readw(0xc0000) == 0xaa55) {
+	        int size;
+		int i;
+		u8 sum;
+		
+		PRINTF("Found video bios signature\n");
+		size = 512*readb(0xc0002);
+		PRINTF("size %d\n", size);
+		sum=0;
+		for (i=0;i<size;i++) {
+			sum += readb(0xc0000 + i);
+		}
+		PRINTF("Checksum is %sOK\n",sum?"NOT ":"");
+		if (sum) {
+			return 1;
+		}
+		
+		/* some video bioses (ATI Mach64) seem to think that
+		 * the original int 10 handler is always at
+		 * 0xf000:0xf065 , place an iret instruction there
+		 */
+		writeb(0xcf, 0xff065);
+		
+		regs.esp = 0x8000;
+		regs.xss = 0x2000;
+		enter_realmode(0xc000, 3, &regs, &regs);
+		PRINTF("INT 0x10 vector after:  %04x:%04x\n",
+		       readw(0x42), readw(0x40)); 
+		PRINTF("BIOS returned %scarry\n", regs.eflags & 1?"":"NOT ");
+#ifdef PCI_BIOS_DEBUG		
+		print_bios_bios_stat();
+#endif		
+		return (regs.eflags & 1);
+		
+	}
+	
+	return 1;
+	
+}
+
+