110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
/*
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* QEMU Alpha PCI support functions.
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*
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* Some of this isn't very Alpha specific at all.
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*
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* ??? Sparse memory access not implemented.
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*/
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#include "config.h"
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#include "alpha_sys.h"
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#include "qemu/log.h"
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#include "sysemu/sysemu.h"
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/* PCI IO reads/writes, to byte-word addressable memory. */
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/* ??? Doesn't handle multiple PCI busses. */
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static uint64_t bw_io_read(void *opaque, hwaddr addr, unsigned size)
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{
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switch (size) {
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case 1:
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return cpu_inb(addr);
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case 2:
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return cpu_inw(addr);
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case 4:
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return cpu_inl(addr);
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}
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abort();
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}
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static void bw_io_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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switch (size) {
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case 1:
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cpu_outb(addr, val);
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break;
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case 2:
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cpu_outw(addr, val);
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break;
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case 4:
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cpu_outl(addr, val);
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break;
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default:
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abort();
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}
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}
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const MemoryRegionOps alpha_pci_bw_io_ops = {
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.read = bw_io_read,
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.write = bw_io_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 4,
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},
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};
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/* PCI config space reads/writes, to byte-word addressable memory. */
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static uint64_t bw_conf1_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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PCIBus *b = opaque;
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return pci_data_read(b, addr, size);
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}
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static void bw_conf1_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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PCIBus *b = opaque;
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pci_data_write(b, addr, val, size);
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}
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const MemoryRegionOps alpha_pci_conf1_ops = {
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.read = bw_conf1_read,
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.write = bw_conf1_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 4,
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},
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};
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/* PCI/EISA Interrupt Acknowledge Cycle. */
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static uint64_t iack_read(void *opaque, hwaddr addr, unsigned size)
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{
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return pic_read_irq(isa_pic);
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}
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static void special_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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qemu_log("pci: special write cycle");
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}
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const MemoryRegionOps alpha_pci_iack_ops = {
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.read = iack_read,
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.write = special_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.valid = {
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.min_access_size = 4,
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.max_access_size = 4,
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},
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.impl = {
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.min_access_size = 4,
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.max_access_size = 4,
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},
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};
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