Merge remote-tracking branch 'kraxel/pixman.v3' into staging
[sdk/emulator/qemu.git] / hw / alpha_pci.c
1 /*
2  * QEMU Alpha PCI support functions.
3  *
4  * Some of this isn't very Alpha specific at all.
5  *
6  * ??? Sparse memory access not implemented.
7  */
8
9 #include "config.h"
10 #include "alpha_sys.h"
11 #include "qemu-log.h"
12 #include "sysemu.h"
13
14
15 /* PCI IO reads/writes, to byte-word addressable memory.  */
16 /* ??? Doesn't handle multiple PCI busses.  */
17
18 static uint64_t bw_io_read(void *opaque, hwaddr addr, unsigned size)
19 {
20     switch (size) {
21     case 1:
22         return cpu_inb(addr);
23     case 2:
24         return cpu_inw(addr);
25     case 4:
26         return cpu_inl(addr);
27     }
28     abort();
29 }
30
31 static void bw_io_write(void *opaque, hwaddr addr,
32                         uint64_t val, unsigned size)
33 {
34     switch (size) {
35     case 1:
36         cpu_outb(addr, val);
37         break;
38     case 2:
39         cpu_outw(addr, val);
40         break;
41     case 4:
42         cpu_outl(addr, val);
43         break;
44     default:
45         abort();
46     }
47 }
48
49 const MemoryRegionOps alpha_pci_bw_io_ops = {
50     .read = bw_io_read,
51     .write = bw_io_write,
52     .endianness = DEVICE_LITTLE_ENDIAN,
53     .impl = {
54         .min_access_size = 1,
55         .max_access_size = 4,
56     },
57 };
58
59 /* PCI config space reads/writes, to byte-word addressable memory.  */
60 static uint64_t bw_conf1_read(void *opaque, hwaddr addr,
61                               unsigned size)
62 {
63     PCIBus *b = opaque;
64     return pci_data_read(b, addr, size);
65 }
66
67 static void bw_conf1_write(void *opaque, hwaddr addr,
68                            uint64_t val, unsigned size)
69 {
70     PCIBus *b = opaque;
71     pci_data_write(b, addr, val, size);
72 }
73
74 const MemoryRegionOps alpha_pci_conf1_ops = {
75     .read = bw_conf1_read,
76     .write = bw_conf1_write,
77     .endianness = DEVICE_LITTLE_ENDIAN,
78     .impl = {
79         .min_access_size = 1,
80         .max_access_size = 4,
81     },
82 };
83
84 /* PCI/EISA Interrupt Acknowledge Cycle.  */
85
86 static uint64_t iack_read(void *opaque, hwaddr addr, unsigned size)
87 {
88     return pic_read_irq(isa_pic);
89 }
90
91 static void special_write(void *opaque, hwaddr addr,
92                           uint64_t val, unsigned size)
93 {
94     qemu_log("pci: special write cycle");
95 }
96
97 const MemoryRegionOps alpha_pci_iack_ops = {
98     .read = iack_read,
99     .write = special_write,
100     .endianness = DEVICE_LITTLE_ENDIAN,
101     .valid = {
102         .min_access_size = 4,
103         .max_access_size = 4,
104     },
105     .impl = {
106         .min_access_size = 4,
107         .max_access_size = 4,
108     },
109 };