#include <linux/init.h>#include <linux/pci.h>/* PCI interrupt pins */#define PCIA		1#define PCIB		2#define PCIC		3#define PCID		4/* This table is filled in by interrogating the PIIX4 chip */static char pci_irq[5] __initdata;static char irq_tab[][5] __initdata = {	/*      INTA    INTB    INTC    INTD */	{0,	0,	0,	0,	0 },	/*  0: GT64120 PCI bridge */	{0,	0,	0,	0,	0 },	/*  1: Unused */	{0,	0,	0,	0,	0 },	/*  2: Unused */	{0,	0,	0,	0,	0 },	/*  3: Unused */	{0,	0,	0,	0,	0 },	/*  4: Unused */	{0,	0,	0,	0,	0 },	/*  5: Unused */	{0,	0,	0,	0,	0 },	/*  6: Unused */	{0,	0,	0,	0,	0 },	/*  7: Unused */	{0,	0,	0,	0,	0 },	/*  8: Unused */	{0,	0,	0,	0,	0 },	/*  9: Unused */	{0,	0,	0,	0,	PCID },	/* 10: PIIX4 USB */	{0,	PCIB,	0,	0,	0 },	/* 11: AMD 79C973 Ethernet */	{0,	PCIC,	0,	0,	0 },	/* 12: Crystal 4281 Sound */	{0,	0,	0,	0,	0 },	/* 13: Unused */	{0,	0,	0,	0,	0 },	/* 14: Unused */	{0,	0,	0,	0,	0 },	/* 15: Unused */	{0,	0,	0,	0,	0 },	/* 16: Unused */	{0,	0,	0,	0,	0 },	/* 17: Bonito/SOC-it PCI Bridge*/	{0,	PCIA,	PCIB,	PCIC,	PCID },	/* 18: PCI Slot 1 */	{0,	PCIB,	PCIC,	PCID,	PCIA },	/* 19: PCI Slot 2 */	{0,	PCIC,	PCID,	PCIA,	PCIB },	/* 20: PCI Slot 3 */	{0,	PCID,	PCIA,	PCIB,	PCIC }	/* 21: PCI Slot 4 */};int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin){	int virq;	virq = irq_tab[slot][pin];	return pci_irq[virq];}/* Do platform specific device initialization at pci_enable_device() time */int pcibios_plat_dev_init(struct pci_dev *dev){	return 0;}static void __init malta_piix_func0_fixup(struct pci_dev *pdev){	unsigned char reg_val;	static int piixirqmap[16] __initdata = {  /* PIIX PIRQC[A:D] irq mappings */		0,  0, 	0,  3,		4,  5,  6,  7,		0,  9, 10, 11,		12, 0, 14, 15 	};	int i;	/* Interrogate PIIX4 to get PCI IRQ mapping */	for (i = 0; i <= 3; i++) {		pci_read_config_byte(pdev, 0x60+i, &reg_val);		if (reg_val & 0x80)			pci_irq[PCIA+i] = 0;	/* Disabled */		else			pci_irq[PCIA+i] = piixirqmap[reg_val & 15];	}	/* Done by YAMON 2.00 onwards */	if (PCI_SLOT(pdev->devfn) == 10) {		/*		 * Set top of main memory accessible by ISA or DMA		 * devices to 16 Mb.		 */		pci_read_config_byte(pdev, 0x69, &reg_val);		pci_write_config_byte(pdev, 0x69, reg_val | 0xf0);	}}DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,	 malta_piix_func0_fixup);static void __init malta_piix_func1_fixup(struct pci_dev *pdev){	unsigned char reg_val;	/* Done by YAMON 2.02 onwards */	if (PCI_SLOT(pdev->devfn) == 10) {		/*		 * IDE Decode enable.		 */		pci_read_config_byte(pdev, 0x41, &reg_val);		pci_write_config_byte(pdev, 0x41, reg_val|0x80);		pci_read_config_byte(pdev, 0x43, &reg_val);		pci_write_config_byte(pdev, 0x43, reg_val|0x80);	}}DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,	 malta_piix_func1_fixup);