LXR linux-old/arch/alpha/kernel/pci-noop.c

   1/*
   2 *      linux/arch/alpha/kernel/pci-noop.c
   3 *
   4 * Stub PCI interfaces for Jensen-specific kernels.
   5 */
   6
   7#include <linux/pci.h>
   8#include <linux/init.h>
   9#include <linux/bootmem.h>
  10#include <linux/errno.h>
  11#include <linux/sched.h>
  12
  13#include "proto.h"
  14
  15
  16/*
  17 * The PCI controller list.
  18 */
  19
  20struct pci_controller *hose_head, **hose_tail = &hose_head;
  21struct pci_controller *pci_isa_hose;
  22
  23
  24struct pci_controller * __init
  25alloc_pci_controller(void)
  26{
  27        struct pci_controller *hose;
  28
  29        hose = alloc_bootmem(sizeof(*hose));
  30
  31        *hose_tail = hose;
  32        hose_tail = &hose->next;
  33
  34        return hose;
  35}
  36
  37struct resource * __init
  38alloc_resource(void)
  39{
  40        struct resource *res;
  41
  42        res = alloc_bootmem(sizeof(*res));
  43
  44        return res;
  45}
  46
  47asmlinkage long
  48sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
  49{
  50        struct pci_controller *hose;
  51        struct pci_dev *dev;
  52
  53        /* from hose or from bus.devfn */
  54        if (which & IOBASE_FROM_HOSE) {
  55                for (hose = hose_head; hose; hose = hose->next) 
  56                        if (hose->index == bus)
  57                                break;
  58                if (!hose)
  59                        return -ENODEV;
  60        } else {
  61                /* Special hook for ISA access.  */
  62                if (bus == 0 && dfn == 0)
  63                        hose = pci_isa_hose;
  64                else
  65                        return -ENODEV;
  66        }
  67
  68        switch (which & ~IOBASE_FROM_HOSE) {
  69        case IOBASE_HOSE:
  70                return hose->index;
  71        case IOBASE_SPARSE_MEM:
  72                return hose->sparse_mem_base;
  73        case IOBASE_DENSE_MEM:
  74                return hose->dense_mem_base;
  75        case IOBASE_SPARSE_IO:
  76                return hose->sparse_io_base;
  77        case IOBASE_DENSE_IO:
  78                return hose->dense_io_base;
  79        case IOBASE_ROOT_BUS:
  80                return hose->bus->number;
  81        }
  82
  83        return -EOPNOTSUPP;
  84}
  85
  86asmlinkage long
  87sys_pciconfig_read(unsigned long bus, unsigned long dfn,
  88                   unsigned long off, unsigned long len, void *buf)
  89{
  90        if (!capable(CAP_SYS_ADMIN))
  91                return -EPERM;
  92        else
  93                return -ENODEV;
  94}
  95
  96asmlinkage long
  97sys_pciconfig_write(unsigned long bus, unsigned long dfn,
  98                    unsigned long off, unsigned long len, void *buf)
  99{
 100        if (!capable(CAP_SYS_ADMIN))
 101                return -EPERM;
 102        else
 103                return -ENODEV;
 104}
 105/* stubs for the routines in pci_iommu.c */
 106void *
 107pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
 108{
 109        return (void *)0;
 110}
 111void
 112pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
 113                    dma_addr_t dma_addr)
 114{
 115}
 116dma_addr_t
 117pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
 118               int direction)
 119{
 120        return (dma_addr_t)0;
 121}
 122void
 123pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
 124                 int direction)
 125{
 126}
 127int
 128pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
 129           int direction)
 130{
 131        return 0;
 132}
 133void
 134pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
 135             int direction)
 136{
 137}
 138int
 139pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
 140{
 141        return 0;
 142}
 143