Viewing file:  pci-noop.c (2.65 KB) -rw-r--r--
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/*
* linux/arch/alpha/kernel/pci-noop.c
*
* Stub PCI interfaces for Jensen-specific kernels.
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include "proto.h"
/*
* The PCI controller list.
*/
struct pci_controller *hose_head, **hose_tail = &hose_head;
struct pci_controller *pci_isa_hose;
struct pci_controller * __init
alloc_pci_controller(void)
{
struct pci_controller *hose;
hose = alloc_bootmem(sizeof(*hose));
*hose_tail = hose;
hose_tail = &hose->next;
return hose;
}
struct resource * __init
alloc_resource(void)
{
struct resource *res;
res = alloc_bootmem(sizeof(*res));
return res;
}
asmlinkage long
sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
{
struct pci_controller *hose;
struct pci_dev *dev;
/* from hose or from bus.devfn */
if (which & IOBASE_FROM_HOSE) {
for (hose = hose_head; hose; hose = hose->next)
if (hose->index == bus)
break;
if (!hose)
return -ENODEV;
} else {
/* Special hook for ISA access. */
if (bus == 0 && dfn == 0)
hose = pci_isa_hose;
else
return -ENODEV;
}
switch (which & ~IOBASE_FROM_HOSE) {
case IOBASE_HOSE:
return hose->index;
case IOBASE_SPARSE_MEM:
return hose->sparse_mem_base;
case IOBASE_DENSE_MEM:
return hose->dense_mem_base;
case IOBASE_SPARSE_IO:
return hose->sparse_io_base;
case IOBASE_DENSE_IO:
return hose->dense_io_base;
case IOBASE_ROOT_BUS:
return hose->bus->number;
}
return -EOPNOTSUPP;
}
asmlinkage long
sys_pciconfig_read(unsigned long bus, unsigned long dfn,
unsigned long off, unsigned long len, void *buf)
{
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
else
return -ENODEV;
}
asmlinkage long
sys_pciconfig_write(unsigned long bus, unsigned long dfn,
unsigned long off, unsigned long len, void *buf)
{
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
else
return -ENODEV;
}
/* stubs for the routines in pci_iommu.c */
void *
pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
{
return (void *)0;
}
void
pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
dma_addr_t dma_addr)
{
}
dma_addr_t
pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
int direction)
{
return (dma_addr_t)0;
}
void
pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
int direction)
{
}
int
pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
int direction)
{
return 0;
}
void
pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
int direction)
{
}
int
pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
{
return 0;
}
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