1/* 2 * linux/include/asm-xtensa/pci.h 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 2001 - 2005 Tensilica Inc. 9 */ 10 11#ifndef _XTENSA_PCI_H 12#define _XTENSA_PCI_H 13 14#ifdef __KERNEL__ 15 16/* Can be used to override the logic in pci_scan_bus for skipping 17 * already-configured bus numbers - to be used for buggy BIOSes 18 * or architectures with incomplete PCI setup by the loader 19 */ 20 21#define pcibios_assign_all_busses() 0 22 23extern struct pci_controller* pcibios_alloc_controller(void); 24 25static inline void pcibios_set_master(struct pci_dev *dev) 26{ 27 /* No special bus mastering setup handling */ 28} 29 30static inline void pcibios_penalize_isa_irq(int irq) 31{ 32 /* We don't do dynamic PCI IRQ allocation */ 33} 34 35/* Assume some values. (We should revise them, if necessary) */ 36 37#define PCIBIOS_MIN_IO 0x2000 38#define PCIBIOS_MIN_MEM 0x10000000 39 40/* Dynamic DMA mapping stuff. 41 * Xtensa has everything mapped statically like x86. 42 */ 43 44#include <linux/types.h> 45#include <linux/slab.h> 46#include <asm/scatterlist.h> 47#include <linux/string.h> 48#include <asm/io.h> 49 50struct pci_dev; 51 52/* The PCI address space does equal the physical memory address space. 53 * The networking and block device layers use this boolean for bounce buffer 54 * decisions. 55 */ 56 57#define PCI_DMA_BUS_IS_PHYS (1) 58 59/* pci_unmap_{page,single} is a no-op, so */ 60#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) 61#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) 62#define pci_unmap_addr(PTR, ADDR_NAME) (0) 63#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0) 64#define pci_ubnmap_len(PTR, LEN_NAME) (0) 65#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) 66 67/* We cannot access memory above 4GB */ 68#define pci_dac_dma_supported(pci_dev, mask) (0) 69 70/* Map a range of PCI memory or I/O space for a device into user space */ 71int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma, 72 enum pci_mmap_state mmap_state, int write_combine); 73 74/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */ 75#define HAVE_PCI_MMAP 1 76 77static inline void pcibios_add_platform_entries(struct pci_dev *dev) 78{ 79} 80 81#endif /* __KERNEL__ */ 82 83/* Implement the pci_ DMA API in terms of the generic device dma_ one */ 84#include <asm-generic/pci-dma-compat.h> 85 86/* Generic PCI */ 87#include <asm-generic/pci.h> 88 89#endif /* _XTENSA_PCI_H */ 90