pci.h

linux 内核源代码

/*
 * linux/include/asm-xtensa/pci.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */

#ifndef _XTENSA_PCI_H
#define _XTENSA_PCI_H

#ifdef __KERNEL__

/* Can be used to override the logic in pci_scan_bus for skipping
 * already-configured bus numbers - to be used for buggy BIOSes
 * or architectures with incomplete PCI setup by the loader
 */

#define pcibios_assign_all_busses()	0

extern struct pci_controller* pcibios_alloc_controller(void);

static inline void pcibios_set_master(struct pci_dev *dev)
{
	/* No special bus mastering setup handling */
}

static inline void pcibios_penalize_isa_irq(int irq)
{
	/* We don't do dynamic PCI IRQ allocation */
}

/* Assume some values. (We should revise them, if necessary) */

#define PCIBIOS_MIN_IO		0x2000
#define PCIBIOS_MIN_MEM		0x10000000

/* Dynamic DMA mapping stuff.
 * Xtensa has everything mapped statically like x86.
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <asm/scatterlist.h>
#include <linux/string.h>
#include <asm/io.h>

struct pci_dev;

/* The PCI address space does equal the physical memory address space.
 * The networking and block device layers use this boolean for bounce buffer
 * decisions.
 */

#define PCI_DMA_BUS_IS_PHYS	(1)

/* pci_unmap_{page,single} is a no-op, so */
#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
#define pci_unmap_addr(PTR, ADDR_NAME)		(0)
#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)	do { } while (0)
#define pci_ubnmap_len(PTR, LEN_NAME)		(0)
#define pci_unmap_len_set(PTR, LEN_NAME, VAL)	do { } while (0)

/* Map a range of PCI memory or I/O space for a device into user space */
int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
                        enum pci_mmap_state mmap_state, int write_combine);

/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
#define HAVE_PCI_MMAP	1

#endif /* __KERNEL__ */

/* Implement the pci_ DMA API in terms of the generic device dma_ one */
#include <asm-generic/pci-dma-compat.h>

/* Generic PCI */
#include <asm-generic/pci.h>

#endif	/* _XTENSA_PCI_H */