qemu/ioport.c

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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 "exec/ioport.h"
#include "trace.h"
#include "exec/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++) {
report serial devices created with -device in the PIIX4 config space Serial and parallel devices created with -device are not reported in the PIIX4 configuration space, and are hence not picked up by the DSDT. This upsets Windows, which hides them altogether from the guest. To avoid this, check at the end of machine initialization whether the corresponding I/O ports have been registered. The new function in ioport.c does this; this also requires a tweak to isa_unassign_ioport. I left the comment in piix4_pm_initfn since the registers I moved do seem to match the 82371AB datasheet. There are some quirks though. We are setting this bit: "Device 8 EIO Enable (EIO_EN_DEV8)—R/W. 1=Enable PCI access to the device 8 enabled I/O ranges to be claimed by PIIX4 and forwarded to the ISA/EIO bus. 0=Disable. The LPT_MON_EN must be set to enable the decode." but not LPT_MON_EN (bit 18 at 50h): LPT Port Enable (LPT_MON_EN)—R/W. 1=Enable accesses to parallel port address range (LPT_DEC_SEL) to generate a device 8 (parallel port) decode event. 0=Disable. We're also setting the LPT_DEC_SEL field (that's the 0x60 written to 63h) to 11, which means reserved, rather than to 01 (378h-37Fh). Likewise we're not setting SA_MON_EN, SB_MON_EN (respectively bit 14 and bit 16 at address 50h) for the serial ports. However, we're setting COMA_DEC_SEL and COMB_DEC_SEL correctly, unlike the corresponding register for the parallel port. All these fields are left as they are, since they are probably only meant to be used in the DSDT. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-15 15:10:15 +00:00
ioport_read_table[0][i] = NULL;
ioport_read_table[1][i] = NULL;
ioport_read_table[2][i] = NULL;
report serial devices created with -device in the PIIX4 config space Serial and parallel devices created with -device are not reported in the PIIX4 configuration space, and are hence not picked up by the DSDT. This upsets Windows, which hides them altogether from the guest. To avoid this, check at the end of machine initialization whether the corresponding I/O ports have been registered. The new function in ioport.c does this; this also requires a tweak to isa_unassign_ioport. I left the comment in piix4_pm_initfn since the registers I moved do seem to match the 82371AB datasheet. There are some quirks though. We are setting this bit: "Device 8 EIO Enable (EIO_EN_DEV8)—R/W. 1=Enable PCI access to the device 8 enabled I/O ranges to be claimed by PIIX4 and forwarded to the ISA/EIO bus. 0=Disable. The LPT_MON_EN must be set to enable the decode." but not LPT_MON_EN (bit 18 at 50h): LPT Port Enable (LPT_MON_EN)—R/W. 1=Enable accesses to parallel port address range (LPT_DEC_SEL) to generate a device 8 (parallel port) decode event. 0=Disable. We're also setting the LPT_DEC_SEL field (that's the 0x60 written to 63h) to 11, which means reserved, rather than to 01 (378h-37Fh). Likewise we're not setting SA_MON_EN, SB_MON_EN (respectively bit 14 and bit 16 at address 50h) for the serial ports. However, we're setting COMA_DEC_SEL and COMB_DEC_SEL correctly, unlike the corresponding register for the parallel port. All these fields are left as they are, since they are probably only meant to be used in the DSDT. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-15 15:10:15 +00:00
ioport_write_table[0][i] = NULL;
ioport_write_table[1][i] = NULL;
ioport_write_table[2][i] = NULL;
ioport_opaque[i] = NULL;
}
}
report serial devices created with -device in the PIIX4 config space Serial and parallel devices created with -device are not reported in the PIIX4 configuration space, and are hence not picked up by the DSDT. This upsets Windows, which hides them altogether from the guest. To avoid this, check at the end of machine initialization whether the corresponding I/O ports have been registered. The new function in ioport.c does this; this also requires a tweak to isa_unassign_ioport. I left the comment in piix4_pm_initfn since the registers I moved do seem to match the 82371AB datasheet. There are some quirks though. We are setting this bit: "Device 8 EIO Enable (EIO_EN_DEV8)—R/W. 1=Enable PCI access to the device 8 enabled I/O ranges to be claimed by PIIX4 and forwarded to the ISA/EIO bus. 0=Disable. The LPT_MON_EN must be set to enable the decode." but not LPT_MON_EN (bit 18 at 50h): LPT Port Enable (LPT_MON_EN)—R/W. 1=Enable accesses to parallel port address range (LPT_DEC_SEL) to generate a device 8 (parallel port) decode event. 0=Disable. We're also setting the LPT_DEC_SEL field (that's the 0x60 written to 63h) to 11, which means reserved, rather than to 01 (378h-37Fh). Likewise we're not setting SA_MON_EN, SB_MON_EN (respectively bit 14 and bit 16 at address 50h) for the serial ports. However, we're setting COMA_DEC_SEL and COMB_DEC_SEL correctly, unlike the corresponding register for the parallel port. All these fields are left as they are, since they are probably only meant to be used in the DSDT. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-15 15:10:15 +00:00
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;
}
}