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
47 res
= alloc_bootmem(sizeof(*res
));
53 sys_pciconfig_iobase(long which
, unsigned long bus
, unsigned long dfn
)
55 struct pci_controller
*hose
;
57 /* from hose or from bus.devfn */
58 if (which
& IOBASE_FROM_HOSE
) {
59 for (hose
= hose_head
; hose
; hose
= hose
->next
)
60 if (hose
->index
== bus
)
65 /* Special hook for ISA access. */
66 if (bus
== 0 && dfn
== 0)
72 switch (which
& ~IOBASE_FROM_HOSE
) {
75 case IOBASE_SPARSE_MEM
:
76 return hose
->sparse_mem_base
;
77 case IOBASE_DENSE_MEM
:
78 return hose
->dense_mem_base
;
79 case IOBASE_SPARSE_IO
:
80 return hose
->sparse_io_base
;
82 return hose
->dense_io_base
;
84 return hose
->bus
->number
;
91 sys_pciconfig_read(unsigned long bus
, unsigned long dfn
,
92 unsigned long off
, unsigned long len
, void *buf
)
94 if (!capable(CAP_SYS_ADMIN
))
101 sys_pciconfig_write(unsigned long bus
, unsigned long dfn
,
102 unsigned long off
, unsigned long len
, void *buf
)
104 if (!capable(CAP_SYS_ADMIN
))
110 static void *alpha_noop_alloc_coherent(struct device
*dev
, size_t size
,
111 dma_addr_t
*dma_handle
, gfp_t gfp
,
112 struct dma_attrs
*attrs
)
116 if (!dev
|| *dev
->dma_mask
>= 0xffffffffUL
)
118 ret
= (void *)__get_free_pages(gfp
, get_order(size
));
120 memset(ret
, 0, size
);
121 *dma_handle
= virt_to_phys(ret
);
126 static int alpha_noop_supported(struct device
*dev
, u64 mask
)
128 return mask
< 0x00ffffffUL
? 0 : 1;
131 struct dma_map_ops alpha_noop_ops
= {
132 .alloc
= alpha_noop_alloc_coherent
,
133 .free
= dma_noop_free_coherent
,
134 .map_page
= dma_noop_map_page
,
135 .map_sg
= dma_noop_map_sg
,
136 .mapping_error
= dma_noop_mapping_error
,
137 .dma_supported
= alpha_noop_supported
,
140 struct dma_map_ops
*dma_ops
= &alpha_noop_ops
;
141 EXPORT_SYMBOL(dma_ops
);