1/*
2 * QEMU HP-PARISC PCI support functions.
3 *
4 */
5
6#include "qemu/osdep.h"
7#include "hppa_sys.h"
8#include "qemu/log.h"
9#include "trace.h"
10
11
12/* Fallback for unassigned PCI I/O operations. Avoids MCHK. */
13
14static uint64_t ignore_read(void *opaque, hwaddr addr, unsigned size)
15{
16 return 0;
17}
18
19static void ignore_write(void *opaque, hwaddr addr, uint64_t v, unsigned size)
20{
21}
22
23const MemoryRegionOps hppa_pci_ignore_ops = {
24 .read = ignore_read,
25 .write = ignore_write,
26 .endianness = DEVICE_BIG_ENDIAN,
27 .valid = {
28 .min_access_size = 1,
29 .max_access_size = 8,
30 },
31 .impl = {
32 .min_access_size = 1,
33 .max_access_size = 8,
34 },
35};
36
37
38/* PCI config space reads/writes, to byte-word addressable memory. */
39static uint64_t bw_conf1_read(void *opaque, hwaddr addr,
40 unsigned size)
41{
42 PCIBus *b = opaque;
43 return pci_data_read(b, addr, size);
44}
45
46static void bw_conf1_write(void *opaque, hwaddr addr,
47 uint64_t val, unsigned size)
48{
49 PCIBus *b = opaque;
50 pci_data_write(b, addr, val, size);
51}
52
53const MemoryRegionOps hppa_pci_conf1_ops = {
54 .read = bw_conf1_read,
55 .write = bw_conf1_write,
56 .endianness = DEVICE_BIG_ENDIAN,
57 .impl = {
58 .min_access_size = 1,
59 .max_access_size = 4,
60 },
61};
62
63/* PCI/EISA Interrupt Acknowledge Cycle. */
64
65static uint64_t iack_read(void *opaque, hwaddr addr, unsigned size)
66{
67 return pic_read_irq(isa_pic);
68}
69
70static void special_write(void *opaque, hwaddr addr,
71 uint64_t val, unsigned size)
72{
73 trace_hppa_pci_iack_write();
74}
75
76const MemoryRegionOps hppa_pci_iack_ops = {
77 .read = iack_read,
78 .write = special_write,
79 .endianness = DEVICE_BIG_ENDIAN,
80 .valid = {
81 .min_access_size = 4,
82 .max_access_size = 4,
83 },
84 .impl = {
85 .min_access_size = 4,
86 .max_access_size = 4,
87 },
88};
89