From 7a8e9bed17d7924a9c5c4699b1f6a3a0359524ed Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sat, 31 May 2003 18:35:21 +0000
Subject: * Patch by Marc Singer, 29 May 2003:   Fixed rarp boot method for
 IA32 and other little-endian CPUs.
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* 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
---
 lib_i386/pci.c | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 lib_i386/pci.c

(limited to 'lib_i386/pci.c')

diff --git a/lib_i386/pci.c b/lib_i386/pci.c
new file mode 100644
index 000000000..acd1d25fa
--- /dev/null
+++ b/lib_i386/pci.c
@@ -0,0 +1,156 @@
+/*
+ * (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 <asm/io.h> 
+#include <asm/pci.h> 
+
+#ifdef CONFIG_PCI
+#undef PCI_ROM_SCAN_VERBOSE
+
+int pci_shadow_rom(pci_dev_t dev, unsigned char *dest) 
+{
+	struct pci_controller *hose;
+	int res = -1;
+	int i;
+	
+	u32 rom_addr;
+	u32 addr_reg;
+	u32 size;
+	
+	u16 vendor;
+	u16 device;
+	u32 class_code;
+
+	hose = pci_bus_to_hose(PCI_BUS(dev));
+#if 0
+	printf("pci_shadow_rom() asked to shadow device %x to %x\n",
+	       dev, (u32)dest);
+#endif	
+	pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
+	pci_read_config_word(dev, PCI_DEVICE_ID, &device);
+	pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_code);
+	
+ 	class_code &= 0xffffff00;
+	class_code >>= 8;
+
+#if 0	
+	printf("PCI Header Vendor %04x device %04x class %06x\n",
+	       vendor, device, class_code);
+#endif	
+	/* Enable the rom addess decoder */
+	pci_write_config_dword(dev, PCI_ROM_ADDRESS, PCI_ROM_ADDRESS_MASK);
+	pci_read_config_dword(dev, PCI_ROM_ADDRESS, &addr_reg);
+
+	if (!addr_reg) {
+		/* register unimplemented */
+		printf("pci_chadow_rom: device do not seem to have a rom\n");
+		return -1;
+	}
+	
+	size = (~(addr_reg&PCI_ROM_ADDRESS_MASK))+1;  
+	
+#if 0	
+	printf("ROM is %d bytes\n", size);
+#endif	
+	rom_addr = pci_get_rom_window(hose, size);
+#if 0	
+	printf("ROM mapped at %x \n", rom_addr);
+#endif	
+	pci_write_config_dword(dev, PCI_ROM_ADDRESS, 
+			       pci_phys_to_mem(dev, rom_addr)
+			       |PCI_ROM_ADDRESS_ENABLE);
+
+
+	
+	for (i=rom_addr;i<rom_addr+size; i+=512) {
+		
+		
+		if (readw(i) == 0xaa55) {
+			u32 pci_data;
+#ifdef PCI_ROM_SCAN_VERBOSE
+			printf("ROM signature found\n");
+#endif			
+			pci_data = readw(0x18+i);
+			pci_data += i;
+			
+			if (0==memcmp((void*)pci_data, "PCIR", 4)) {
+#ifdef PCI_ROM_SCAN_VERBOSE				
+				printf("Fount PCI rom image at offset %d\n", i-rom_addr);
+				printf("Vendor %04x device %04x class %06x\n",
+				       readw(pci_data+4), readw(pci_data+6),
+				       readl(pci_data+0x0d)&0xffffff);
+				printf("%s\n", 
+				       (readw(pci_data+0x15) &0x80)?
+				       "Last image":"More images follow");
+				switch 	(readb(pci_data+0x14)) {
+				case 0:
+					printf("X86 code\n");
+					break;
+				case 1:
+					printf("Openfirmware code\n");
+					break;
+				case 2:
+					printf("PARISC code\n");
+					break;
+				}
+				printf("Image size %d\n", readw(pci_data+0x10) * 512);
+#endif				
+				/* FixMe: I think we should compare the class code
+				 * bytes as well but I have no reference on the
+				 * exact order of these bytes in the PCI ROM header */
+				if (readw(pci_data+4) == vendor && 
+				    readw(pci_data+6) == device &&
+				    /* (readl(pci_data+0x0d)&0xffffff) == class_code && */
+				    readb(pci_data+0x14) == 0 /* x86 code image */ ) {
+#ifdef PCI_ROM_SCAN_VERBOSE					
+					printf("Suitable ROM image found, copying\n");
+#endif					
+					memmove(dest, (void*)rom_addr, readw(pci_data+0x10) * 512);
+					res = 0;
+					break;
+					
+				}
+				if (readw(pci_data+0x15) &0x80) {
+					break;
+				}
+			}
+		}
+		
+	}
+	
+#ifdef PCI_ROM_SCAN_VERBOSE
+	if (res) {
+		printf("No suitable image found\n");
+	}
+#endif	
+	/* disable PAR register and PCI device ROM address devocer */
+	pci_remove_rom_window(hose, rom_addr);
+	  	
+	pci_write_config_dword(dev, PCI_ROM_ADDRESS, 0);
+
+	return res;
+}
+
+#endif
-- 
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