diff options
Diffstat (limited to 'arch/alpha/kernel/pci-noop.c')
| -rw-r--r-- | arch/alpha/kernel/pci-noop.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/arch/alpha/kernel/pci-noop.c b/arch/alpha/kernel/pci-noop.c new file mode 100644 index 000000000000..582a3519fb28 --- /dev/null +++ b/arch/alpha/kernel/pci-noop.c @@ -0,0 +1,214 @@ +/* + * 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/mm.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/dma-mapping.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; + + /* 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 NULL; +} + +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; +} + +/* Generic DMA mapping functions: */ + +void * +dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, int gfp) +{ + void *ret; + + if (!dev || *dev->dma_mask >= 0xffffffffUL) + gfp &= ~GFP_DMA; + ret = (void *)__get_free_pages(gfp, get_order(size)); + if (ret) { + memset(ret, 0, size); + *dma_handle = virt_to_bus(ret); + } + return ret; +} + +EXPORT_SYMBOL(dma_alloc_coherent); + +int +dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction direction) +{ + int i; + + for (i = 0; i < nents; i++ ) { + void *va; + + BUG_ON(!sg[i].page); + va = page_address(sg[i].page) + sg[i].offset; + sg_dma_address(sg + i) = (dma_addr_t)virt_to_bus(va); + sg_dma_len(sg + i) = sg[i].length; + } + + return nents; +} + +EXPORT_SYMBOL(dma_map_sg); + +int +dma_set_mask(struct device *dev, u64 mask) +{ + if (!dev->dma_mask || !dma_supported(dev, mask)) + return -EIO; + + *dev->dma_mask = mask; + + return 0; +} + +void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) +{ + return NULL; +} + +void pci_iounmap(struct pci_dev *dev, void __iomem * addr) +{ +} + +EXPORT_SYMBOL(pci_iomap); +EXPORT_SYMBOL(pci_iounmap); |