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xemu/ioport.c
Blue Swirl 4200872b37 ioport: use INT64_MAX for IO ranges 
Expression UINT64_MAX + 1 will make the range bigger than
what can be represented with a 64 bit type. This would
trigger an assert in int128_get64() after the next patch.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-19 15:17:21 +02:00

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/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
* splitted out ioport related stuffs from vl.c.
*/
#include "ioport.h"
#include "trace.h"
#include "memory.h"
/***********************************************************/
/* IO Port */
//#define DEBUG_UNUSED_IOPORT
//#define DEBUG_IOPORT
#ifdef DEBUG_UNUSED_IOPORT
# define LOG_UNUSED_IOPORT(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
#else
# define LOG_UNUSED_IOPORT(fmt, ...) do{ } while (0)
#endif
#ifdef DEBUG_IOPORT
# define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__)
#else
# define LOG_IOPORT(...) do { } while (0)
#endif
/* XXX: use a two level table to limit memory usage */
static void *ioport_opaque[MAX_IOPORTS];
static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
static IOPortDestructor *ioport_destructor_table[MAX_IOPORTS];
static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl;
static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel;
static uint32_t ioport_read(int index, uint32_t address)
{
static IOPortReadFunc * const default_func[3] = {
default_ioport_readb,
default_ioport_readw,
default_ioport_readl
};
IOPortReadFunc *func = ioport_read_table[index][address];
if (!func)
func = default_func[index];
return func(ioport_opaque[address], address);
}
static void ioport_write(int index, uint32_t address, uint32_t data)
{
static IOPortWriteFunc * const default_func[3] = {
default_ioport_writeb,
default_ioport_writew,
default_ioport_writel
};
IOPortWriteFunc *func = ioport_write_table[index][address];
if (!func)
func = default_func[index];
func(ioport_opaque[address], address, data);
}
static uint32_t default_ioport_readb(void *opaque, uint32_t address)
{
LOG_UNUSED_IOPORT("unused inb: port=0x%04"PRIx32"\n", address);
return 0xff;
}
static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
{
LOG_UNUSED_IOPORT("unused outb: port=0x%04"PRIx32" data=0x%02"PRIx32"\n",
address, data);
}
/* default is to make two byte accesses */
static uint32_t default_ioport_readw(void *opaque, uint32_t address)
{
uint32_t data;
data = ioport_read(0, address);
address = (address + 1) & IOPORTS_MASK;
data |= ioport_read(0, address) << 8;
return data;
}
static void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
{
ioport_write(0, address, data & 0xff);
address = (address + 1) & IOPORTS_MASK;
ioport_write(0, address, (data >> 8) & 0xff);
}
static uint32_t default_ioport_readl(void *opaque, uint32_t address)
{
LOG_UNUSED_IOPORT("unused inl: port=0x%04"PRIx32"\n", address);
return 0xffffffff;
}
static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
{
LOG_UNUSED_IOPORT("unused outl: port=0x%04"PRIx32" data=0x%02"PRIx32"\n",
address, data);
}
static int ioport_bsize(int size, int *bsize)
{
if (size == 1) {
*bsize = 0;
} else if (size == 2) {
*bsize = 1;
} else if (size == 4) {
*bsize = 2;
} else {
return -1;
}
return 0;
}
/* size is the word size in byte */
int register_ioport_read(pio_addr_t start, int length, int size,
IOPortReadFunc *func, void *opaque)
{
int i, bsize;
if (ioport_bsize(size, &bsize)) {
hw_error("register_ioport_read: invalid size");
return -1;
}
for(i = start; i < start + length; ++i) {
ioport_read_table[bsize][i] = func;
if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
hw_error("register_ioport_read: invalid opaque for address 0x%x",
i);
ioport_opaque[i] = opaque;
}
return 0;
}
/* size is the word size in byte */
int register_ioport_write(pio_addr_t start, int length, int size,
IOPortWriteFunc *func, void *opaque)
{
int i, bsize;
if (ioport_bsize(size, &bsize)) {
hw_error("register_ioport_write: invalid size");
return -1;
}
for(i = start; i < start + length; ++i) {
ioport_write_table[bsize][i] = func;
if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
hw_error("register_ioport_write: invalid opaque for address 0x%x",
i);
ioport_opaque[i] = opaque;
}
return 0;
}
static uint32_t ioport_readb_thunk(void *opaque, uint32_t addr)
{
IORange *ioport = opaque;
uint64_t data;
ioport->ops->read(ioport, addr - ioport->base, 1, &data);
return data;
}
static uint32_t ioport_readw_thunk(void *opaque, uint32_t addr)
{
IORange *ioport = opaque;
uint64_t data;
ioport->ops->read(ioport, addr - ioport->base, 2, &data);
return data;
}
static uint32_t ioport_readl_thunk(void *opaque, uint32_t addr)
{
IORange *ioport = opaque;
uint64_t data;
ioport->ops->read(ioport, addr - ioport->base, 4, &data);
return data;
}
static void ioport_writeb_thunk(void *opaque, uint32_t addr, uint32_t data)
{
IORange *ioport = opaque;
ioport->ops->write(ioport, addr - ioport->base, 1, data);
}
static void ioport_writew_thunk(void *opaque, uint32_t addr, uint32_t data)
{
IORange *ioport = opaque;
ioport->ops->write(ioport, addr - ioport->base, 2, data);
}
static void ioport_writel_thunk(void *opaque, uint32_t addr, uint32_t data)
{
IORange *ioport = opaque;
ioport->ops->write(ioport, addr - ioport->base, 4, data);
}
static void iorange_destructor_thunk(void *opaque)
{
IORange *iorange = opaque;
if (iorange->ops->destructor) {
iorange->ops->destructor(iorange);
}
}
void ioport_register(IORange *ioport)
{
register_ioport_read(ioport->base, ioport->len, 1,
ioport_readb_thunk, ioport);
register_ioport_read(ioport->base, ioport->len, 2,
ioport_readw_thunk, ioport);
register_ioport_read(ioport->base, ioport->len, 4,
ioport_readl_thunk, ioport);
register_ioport_write(ioport->base, ioport->len, 1,
ioport_writeb_thunk, ioport);
register_ioport_write(ioport->base, ioport->len, 2,
ioport_writew_thunk, ioport);
register_ioport_write(ioport->base, ioport->len, 4,
ioport_writel_thunk, ioport);
ioport_destructor_table[ioport->base] = iorange_destructor_thunk;
}
void isa_unassign_ioport(pio_addr_t start, int length)
{
int i;
if (ioport_destructor_table[start]) {
ioport_destructor_table[start](ioport_opaque[start]);
ioport_destructor_table[start] = NULL;
}
for(i = start; i < start + length; i++) {
ioport_read_table[0][i] = NULL;
ioport_read_table[1][i] = NULL;
ioport_read_table[2][i] = NULL;
ioport_write_table[0][i] = NULL;
ioport_write_table[1][i] = NULL;
ioport_write_table[2][i] = NULL;
ioport_opaque[i] = NULL;
}
}
bool isa_is_ioport_assigned(pio_addr_t start)
{
return (ioport_read_table[0][start] || ioport_write_table[0][start] ||
ioport_read_table[1][start] || ioport_write_table[1][start] ||
ioport_read_table[2][start] || ioport_write_table[2][start]);
}
/***********************************************************/
void cpu_outb(pio_addr_t addr, uint8_t val)
{
LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
trace_cpu_out(addr, val);
ioport_write(0, addr, val);
}
void cpu_outw(pio_addr_t addr, uint16_t val)
{
LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
trace_cpu_out(addr, val);
ioport_write(1, addr, val);
}
void cpu_outl(pio_addr_t addr, uint32_t val)
{
LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
trace_cpu_out(addr, val);
ioport_write(2, addr, val);
}
uint8_t cpu_inb(pio_addr_t addr)
{
uint8_t val;
val = ioport_read(0, addr);
trace_cpu_in(addr, val);
LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
return val;
}
uint16_t cpu_inw(pio_addr_t addr)
{
uint16_t val;
val = ioport_read(1, addr);
trace_cpu_in(addr, val);
LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
return val;
}
uint32_t cpu_inl(pio_addr_t addr)
{
uint32_t val;
val = ioport_read(2, addr);
trace_cpu_in(addr, val);
LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
return val;
}
void portio_list_init(PortioList *piolist,
const MemoryRegionPortio *callbacks,
void *opaque, const char *name)
{
unsigned n = 0;
while (callbacks[n].size) {
++n;
}
piolist->ports = callbacks;
piolist->nr = 0;
piolist->regions = g_new0(MemoryRegion *, n);
piolist->aliases = g_new0(MemoryRegion *, n);
piolist->address_space = NULL;
piolist->opaque = opaque;
piolist->name = name;
}
void portio_list_destroy(PortioList *piolist)
{
g_free(piolist->regions);
g_free(piolist->aliases);
}
static void portio_list_add_1(PortioList *piolist,
const MemoryRegionPortio *pio_init,
unsigned count, unsigned start,
unsigned off_low, unsigned off_high)
{
MemoryRegionPortio *pio;
MemoryRegionOps *ops;
MemoryRegion *region, *alias;
unsigned i;
/* Copy the sub-list and null-terminate it. */
pio = g_new(MemoryRegionPortio, count + 1);
memcpy(pio, pio_init, sizeof(MemoryRegionPortio) * count);
memset(pio + count, 0, sizeof(MemoryRegionPortio));
/* Adjust the offsets to all be zero-based for the region. */
for (i = 0; i < count; ++i) {
pio[i].offset -= off_low;
}
ops = g_new0(MemoryRegionOps, 1);
ops->old_portio = pio;
region = g_new(MemoryRegion, 1);
alias = g_new(MemoryRegion, 1);
/*
* Use an alias so that the callback is called with an absolute address,
* rather than an offset relative to to start + off_low.
*/
memory_region_init_io(region, ops, piolist->opaque, piolist->name,
INT64_MAX);
memory_region_init_alias(alias, piolist->name,
region, start + off_low, off_high - off_low);
memory_region_add_subregion(piolist->address_space,
start + off_low, alias);
piolist->regions[piolist->nr] = region;
piolist->aliases[piolist->nr] = alias;
++piolist->nr;
}
void portio_list_add(PortioList *piolist,
MemoryRegion *address_space,
uint32_t start)
{
const MemoryRegionPortio *pio, *pio_start = piolist->ports;
unsigned int off_low, off_high, off_last, count;
piolist->address_space = address_space;
/* Handle the first entry specially. */
off_last = off_low = pio_start->offset;
off_high = off_low + pio_start->len;
count = 1;
for (pio = pio_start + 1; pio->size != 0; pio++, count++) {
/* All entries must be sorted by offset. */
assert(pio->offset >= off_last);
off_last = pio->offset;
/* If we see a hole, break the region. */
if (off_last > off_high) {
portio_list_add_1(piolist, pio_start, count, start, off_low,
off_high);
/* ... and start collecting anew. */
pio_start = pio;
off_low = off_last;
off_high = off_low + pio->len;
count = 0;
} else if (off_last + pio->len > off_high) {
off_high = off_last + pio->len;
}
}
/* There will always be an open sub-list. */
portio_list_add_1(piolist, pio_start, count, start, off_low, off_high);
}
void portio_list_del(PortioList *piolist)
{
MemoryRegion *mr, *alias;
unsigned i;
for (i = 0; i < piolist->nr; ++i) {
mr = piolist->regions[i];
alias = piolist->aliases[i];
memory_region_del_subregion(piolist->address_space, alias);
memory_region_destroy(alias);
memory_region_destroy(mr);
g_free((MemoryRegionOps *)mr->ops);
g_free(mr);
g_free(alias);
piolist->regions[i] = NULL;
piolist->aliases[i] = NULL;
}
}
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