mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
2.3 KiB
113 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* linux/arch/alpha/kernel/pci-noop.c |
|
* |
|
* Stub PCI interfaces for Jensen-specific kernels. |
|
*/ |
|
|
|
#include <linux/pci.h> |
|
#include <linux/init.h> |
|
#include <linux/memblock.h> |
|
#include <linux/gfp.h> |
|
#include <linux/capability.h> |
|
#include <linux/mm.h> |
|
#include <linux/errno.h> |
|
#include <linux/sched.h> |
|
#include <linux/dma-mapping.h> |
|
#include <linux/scatterlist.h> |
|
#include <linux/syscalls.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 = memblock_alloc(sizeof(*hose), SMP_CACHE_BYTES); |
|
if (!hose) |
|
panic("%s: Failed to allocate %zu bytes\n", __func__, |
|
sizeof(*hose)); |
|
|
|
*hose_tail = hose; |
|
hose_tail = &hose->next; |
|
|
|
return hose; |
|
} |
|
|
|
struct resource * __init |
|
alloc_resource(void) |
|
{ |
|
void *ptr = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES); |
|
|
|
if (!ptr) |
|
panic("%s: Failed to allocate %zu bytes\n", __func__, |
|
sizeof(struct resource)); |
|
|
|
return ptr; |
|
} |
|
|
|
SYSCALL_DEFINE3(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; |
|
} |
|
|
|
SYSCALL_DEFINE5(pciconfig_read, unsigned long, bus, unsigned long, dfn, |
|
unsigned long, off, unsigned long, len, void __user *, buf) |
|
{ |
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
else |
|
return -ENODEV; |
|
} |
|
|
|
SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn, |
|
unsigned long, off, unsigned long, len, void __user *, buf) |
|
{ |
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
else |
|
return -ENODEV; |
|
}
|
|
|