312 lines
9.5 KiB
C
312 lines
9.5 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* splitted out ioport related stuffs from vl.c.
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*/
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#include "exec/ioport.h"
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#include "trace.h"
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#include "exec/memory.h"
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#include "exec/address-spaces.h"
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//#define DEBUG_IOPORT
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#ifdef DEBUG_IOPORT
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# define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__)
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#else
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# define LOG_IOPORT(...) do { } while (0)
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#endif
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typedef struct MemoryRegionPortioList {
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MemoryRegion mr;
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void *portio_opaque;
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MemoryRegionPortio ports[];
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} MemoryRegionPortioList;
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static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size)
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{
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return -1ULL;
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}
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static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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}
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const MemoryRegionOps unassigned_io_ops = {
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.read = unassigned_io_read,
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.write = unassigned_io_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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void cpu_outb(pio_addr_t addr, uint8_t val)
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{
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LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
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trace_cpu_out(addr, val);
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address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
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&val, 1);
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}
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void cpu_outw(pio_addr_t addr, uint16_t val)
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{
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uint8_t buf[2];
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LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
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trace_cpu_out(addr, val);
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stw_p(buf, val);
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address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
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buf, 2);
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}
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void cpu_outl(pio_addr_t addr, uint32_t val)
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{
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uint8_t buf[4];
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LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
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trace_cpu_out(addr, val);
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stl_p(buf, val);
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address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
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buf, 4);
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}
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uint8_t cpu_inb(pio_addr_t addr)
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{
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uint8_t val;
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address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
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&val, 1);
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trace_cpu_in(addr, val);
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LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
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return val;
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}
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uint16_t cpu_inw(pio_addr_t addr)
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{
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uint8_t buf[2];
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uint16_t val;
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address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 2);
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val = lduw_p(buf);
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trace_cpu_in(addr, val);
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LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
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return val;
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}
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uint32_t cpu_inl(pio_addr_t addr)
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{
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uint8_t buf[4];
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uint32_t val;
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address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 4);
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val = ldl_p(buf);
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trace_cpu_in(addr, val);
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LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
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return val;
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}
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void portio_list_init(PortioList *piolist,
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Object *owner,
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const MemoryRegionPortio *callbacks,
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void *opaque, const char *name)
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{
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unsigned n = 0;
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while (callbacks[n].size) {
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++n;
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}
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piolist->ports = callbacks;
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piolist->nr = 0;
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piolist->regions = g_new0(MemoryRegion *, n);
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piolist->address_space = NULL;
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piolist->opaque = opaque;
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piolist->owner = owner;
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piolist->name = name;
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piolist->flush_coalesced_mmio = false;
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}
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void portio_list_set_flush_coalesced(PortioList *piolist)
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{
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piolist->flush_coalesced_mmio = true;
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}
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void portio_list_destroy(PortioList *piolist)
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{
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MemoryRegionPortioList *mrpio;
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unsigned i;
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for (i = 0; i < piolist->nr; ++i) {
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mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
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object_unparent(OBJECT(&mrpio->mr));
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g_free(mrpio);
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}
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g_free(piolist->regions);
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}
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static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio,
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uint64_t offset, unsigned size,
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bool write)
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{
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const MemoryRegionPortio *mrp;
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for (mrp = mrpio->ports; mrp->size; ++mrp) {
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if (offset >= mrp->offset && offset < mrp->offset + mrp->len &&
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size == mrp->size &&
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(write ? (bool)mrp->write : (bool)mrp->read)) {
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return mrp;
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}
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}
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return NULL;
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}
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static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size)
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{
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MemoryRegionPortioList *mrpio = opaque;
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const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false);
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uint64_t data;
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data = ((uint64_t)1 << (size * 8)) - 1;
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if (mrp) {
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data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
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} else if (size == 2) {
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mrp = find_portio(mrpio, addr, 1, false);
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if (mrp) {
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data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
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if (addr + 1 < mrp->offset + mrp->len) {
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data |= mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8;
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} else {
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data |= 0xff00;
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}
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}
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}
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return data;
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}
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static void portio_write(void *opaque, hwaddr addr, uint64_t data,
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unsigned size)
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{
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MemoryRegionPortioList *mrpio = opaque;
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const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true);
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if (mrp) {
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mrp->write(mrpio->portio_opaque, mrp->base + addr, data);
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} else if (size == 2) {
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mrp = find_portio(mrpio, addr, 1, true);
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if (mrp) {
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mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff);
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if (addr + 1 < mrp->offset + mrp->len) {
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mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8);
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}
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}
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}
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}
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static const MemoryRegionOps portio_ops = {
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.read = portio_read,
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.write = portio_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.valid.unaligned = true,
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.impl.unaligned = true,
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};
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static void portio_list_add_1(PortioList *piolist,
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const MemoryRegionPortio *pio_init,
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unsigned count, unsigned start,
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unsigned off_low, unsigned off_high)
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{
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MemoryRegionPortioList *mrpio;
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unsigned i;
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/* Copy the sub-list and null-terminate it. */
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mrpio = g_malloc0(sizeof(MemoryRegionPortioList) +
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sizeof(MemoryRegionPortio) * (count + 1));
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mrpio->portio_opaque = piolist->opaque;
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memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count);
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memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio));
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/* Adjust the offsets to all be zero-based for the region. */
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for (i = 0; i < count; ++i) {
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mrpio->ports[i].offset -= off_low;
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mrpio->ports[i].base = start + off_low;
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}
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memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio,
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piolist->name, off_high - off_low);
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if (piolist->flush_coalesced_mmio) {
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memory_region_set_flush_coalesced(&mrpio->mr);
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}
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memory_region_add_subregion(piolist->address_space,
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start + off_low, &mrpio->mr);
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piolist->regions[piolist->nr] = &mrpio->mr;
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++piolist->nr;
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}
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void portio_list_add(PortioList *piolist,
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MemoryRegion *address_space,
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uint32_t start)
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{
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const MemoryRegionPortio *pio, *pio_start = piolist->ports;
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unsigned int off_low, off_high, off_last, count;
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piolist->address_space = address_space;
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/* Handle the first entry specially. */
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off_last = off_low = pio_start->offset;
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off_high = off_low + pio_start->len + pio_start->size - 1;
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count = 1;
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for (pio = pio_start + 1; pio->size != 0; pio++, count++) {
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/* All entries must be sorted by offset. */
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assert(pio->offset >= off_last);
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off_last = pio->offset;
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/* If we see a hole, break the region. */
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if (off_last > off_high) {
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portio_list_add_1(piolist, pio_start, count, start, off_low,
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off_high);
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/* ... and start collecting anew. */
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pio_start = pio;
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off_low = off_last;
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off_high = off_low + pio->len + pio_start->size - 1;
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count = 0;
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} else if (off_last + pio->len > off_high) {
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off_high = off_last + pio->len + pio_start->size - 1;
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}
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}
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/* There will always be an open sub-list. */
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portio_list_add_1(piolist, pio_start, count, start, off_low, off_high);
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}
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void portio_list_del(PortioList *piolist)
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{
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MemoryRegionPortioList *mrpio;
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unsigned i;
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for (i = 0; i < piolist->nr; ++i) {
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mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
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memory_region_del_subregion(piolist->address_space, &mrpio->mr);
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}
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}
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