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- /*
- * QEMU Alpha PCI support functions.
- *
- * Some of this isn't very Alpha specific at all.
- *
- * ??? Sparse memory access not implemented.
- */
- #include "qemu/osdep.h"
- #include "hw/pci/pci_host.h"
- #include "alpha_sys.h"
- #include "qemu/log.h"
- #include "trace.h"
- /* Fallback for unassigned PCI I/O operations. Avoids MCHK. */
- static uint64_t ignore_read(void *opaque, hwaddr addr, unsigned size)
- {
- return 0;
- }
- static void ignore_write(void *opaque, hwaddr addr, uint64_t v, unsigned size)
- {
- }
- const MemoryRegionOps alpha_pci_ignore_ops = {
- .read = ignore_read,
- .write = ignore_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
- .valid = {
- .min_access_size = 1,
- .max_access_size = 8,
- },
- .impl = {
- .min_access_size = 1,
- .max_access_size = 8,
- },
- };
- /* PCI config space reads/writes, to byte-word addressable memory. */
- static uint64_t bw_conf1_read(void *opaque, hwaddr addr,
- unsigned size)
- {
- PCIBus *b = opaque;
- return pci_data_read(b, addr, size);
- }
- static void bw_conf1_write(void *opaque, hwaddr addr,
- uint64_t val, unsigned size)
- {
- PCIBus *b = opaque;
- pci_data_write(b, addr, val, size);
- }
- const MemoryRegionOps alpha_pci_conf1_ops = {
- .read = bw_conf1_read,
- .write = bw_conf1_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
- .impl = {
- .min_access_size = 1,
- .max_access_size = 4,
- },
- };
- /* PCI/EISA Interrupt Acknowledge Cycle. */
- static uint64_t iack_read(void *opaque, hwaddr addr, unsigned size)
- {
- return pic_read_irq(isa_pic);
- }
- static void special_write(void *opaque, hwaddr addr,
- uint64_t val, unsigned size)
- {
- trace_alpha_pci_iack_write();
- }
- const MemoryRegionOps alpha_pci_iack_ops = {
- .read = iack_read,
- .write = special_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- },
- .impl = {
- .min_access_size = 4,
- .max_access_size = 4,
- },
- };
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