2 * QEMU Alpha PCI support functions.
4 * Some of this isn't very Alpha specific at all.
6 * ??? Sparse memory access not implemented.
9 #include "qemu/osdep.h"
10 #include "qemu-common.h"
12 #include "alpha_sys.h"
14 #include "sysemu/sysemu.h"
18 /* Fallback for unassigned PCI I/O operations. Avoids MCHK. */
20 static uint64_t ignore_read(void *opaque
, hwaddr addr
, unsigned size
)
25 static void ignore_write(void *opaque
, hwaddr addr
, uint64_t v
, unsigned size
)
29 const MemoryRegionOps alpha_pci_ignore_ops
= {
31 .write
= ignore_write
,
32 .endianness
= DEVICE_LITTLE_ENDIAN
,
44 /* PCI config space reads/writes, to byte-word addressable memory. */
45 static uint64_t bw_conf1_read(void *opaque
, hwaddr addr
,
49 return pci_data_read(b
, addr
, size
);
52 static void bw_conf1_write(void *opaque
, hwaddr addr
,
53 uint64_t val
, unsigned size
)
56 pci_data_write(b
, addr
, val
, size
);
59 const MemoryRegionOps alpha_pci_conf1_ops
= {
60 .read
= bw_conf1_read
,
61 .write
= bw_conf1_write
,
62 .endianness
= DEVICE_LITTLE_ENDIAN
,
69 /* PCI/EISA Interrupt Acknowledge Cycle. */
71 static uint64_t iack_read(void *opaque
, hwaddr addr
, unsigned size
)
73 return pic_read_irq(isa_pic
);
76 static void special_write(void *opaque
, hwaddr addr
,
77 uint64_t val
, unsigned size
)
79 trace_alpha_pci_iack_write();
82 const MemoryRegionOps alpha_pci_iack_ops
= {
84 .write
= special_write
,
85 .endianness
= DEVICE_LITTLE_ENDIAN
,