2 * linux/arch/alpha/kernel/pci-noop.c
4 * Stub PCI interfaces for Jensen-specific kernels.
8 #include <linux/init.h>
9 #include <linux/bootmem.h>
10 #include <linux/gfp.h>
11 #include <linux/capability.h>
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/scatterlist.h>
22 * The PCI controller list.
25 struct pci_controller
*hose_head
, **hose_tail
= &hose_head
;
26 struct pci_controller
*pci_isa_hose
;
29 struct pci_controller
* __init
30 alloc_pci_controller(void)
32 struct pci_controller
*hose
;
34 hose
= alloc_bootmem(sizeof(*hose
));
37 hose_tail
= &hose
->next
;
42 struct resource
* __init
45 return alloc_bootmem(sizeof(struct resource
));
49 sys_pciconfig_iobase(long which
, unsigned long bus
, unsigned long dfn
)
51 struct pci_controller
*hose
;
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
)
61 /* Special hook for ISA access. */
62 if (bus
== 0 && dfn
== 0)
68 switch (which
& ~IOBASE_FROM_HOSE
) {
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
;
78 return hose
->dense_io_base
;
80 return hose
->bus
->number
;
87 sys_pciconfig_read(unsigned long bus
, unsigned long dfn
,
88 unsigned long off
, unsigned long len
, void *buf
)
90 if (!capable(CAP_SYS_ADMIN
))
97 sys_pciconfig_write(unsigned long bus
, unsigned long dfn
,
98 unsigned long off
, unsigned long len
, void *buf
)
100 if (!capable(CAP_SYS_ADMIN
))
106 static void *alpha_noop_alloc_coherent(struct device
*dev
, size_t size
,
107 dma_addr_t
*dma_handle
, gfp_t gfp
,
112 if (!dev
|| *dev
->dma_mask
>= 0xffffffffUL
)
114 ret
= (void *)__get_free_pages(gfp
, get_order(size
));
116 memset(ret
, 0, size
);
117 *dma_handle
= virt_to_phys(ret
);
122 static int alpha_noop_supported(struct device
*dev
, u64 mask
)
124 return mask
< 0x00ffffffUL
? 0 : 1;
127 const struct dma_map_ops alpha_noop_ops
= {
128 .alloc
= alpha_noop_alloc_coherent
,
129 .free
= dma_noop_free_coherent
,
130 .map_page
= dma_noop_map_page
,
131 .map_sg
= dma_noop_map_sg
,
132 .mapping_error
= dma_noop_mapping_error
,
133 .dma_supported
= alpha_noop_supported
,
136 const struct dma_map_ops
*dma_ops
= &alpha_noop_ops
;
137 EXPORT_SYMBOL(dma_ops
);