qemu/hw/fw_cfg.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

402 lines
11 KiB
C

/*
* QEMU Firmware configuration device emulation
*
* Copyright (c) 2008 Gleb Natapov
*
* 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.
*/
#include "hw.h"
#include "sysemu.h"
#include "isa.h"
#include "fw_cfg.h"
#include "sysbus.h"
/* debug firmware config */
//#define DEBUG_FW_CFG
#ifdef DEBUG_FW_CFG
#define FW_CFG_DPRINTF(fmt, ...) \
do { printf("FW_CFG: " fmt , ## __VA_ARGS__); } while (0)
#else
#define FW_CFG_DPRINTF(fmt, ...)
#endif
#define FW_CFG_SIZE 2
typedef struct FWCfgEntry {
uint32_t len;
uint8_t *data;
void *callback_opaque;
FWCfgCallback callback;
} FWCfgEntry;
struct FWCfgState {
SysBusDevice busdev;
uint32_t ctl_iobase, data_iobase;
FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
FWCfgFiles *files;
uint16_t cur_entry;
uint32_t cur_offset;
};
static void fw_cfg_write(FWCfgState *s, uint8_t value)
{
int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
FW_CFG_DPRINTF("write %d\n", value);
if (s->cur_entry & FW_CFG_WRITE_CHANNEL && s->cur_offset < e->len) {
e->data[s->cur_offset++] = value;
if (s->cur_offset == e->len) {
e->callback(e->callback_opaque, e->data);
s->cur_offset = 0;
}
}
}
static int fw_cfg_select(FWCfgState *s, uint16_t key)
{
int ret;
s->cur_offset = 0;
if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
s->cur_entry = FW_CFG_INVALID;
ret = 0;
} else {
s->cur_entry = key;
ret = 1;
}
FW_CFG_DPRINTF("select key %d (%sfound)\n", key, ret ? "" : "not ");
return ret;
}
static uint8_t fw_cfg_read(FWCfgState *s)
{
int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
uint8_t ret;
if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
ret = 0;
else
ret = e->data[s->cur_offset++];
FW_CFG_DPRINTF("read %d\n", ret);
return ret;
}
static uint32_t fw_cfg_io_readb(void *opaque, uint32_t addr)
{
return fw_cfg_read(opaque);
}
static void fw_cfg_io_writeb(void *opaque, uint32_t addr, uint32_t value)
{
fw_cfg_write(opaque, (uint8_t)value);
}
static void fw_cfg_io_writew(void *opaque, uint32_t addr, uint32_t value)
{
fw_cfg_select(opaque, (uint16_t)value);
}
static uint32_t fw_cfg_mem_readb(void *opaque, target_phys_addr_t addr)
{
return fw_cfg_read(opaque);
}
static void fw_cfg_mem_writeb(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
fw_cfg_write(opaque, (uint8_t)value);
}
static void fw_cfg_mem_writew(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
fw_cfg_select(opaque, (uint16_t)value);
}
static CPUReadMemoryFunc * const fw_cfg_ctl_mem_read[3] = {
NULL,
NULL,
NULL,
};
static CPUWriteMemoryFunc * const fw_cfg_ctl_mem_write[3] = {
NULL,
fw_cfg_mem_writew,
NULL,
};
static CPUReadMemoryFunc * const fw_cfg_data_mem_read[3] = {
fw_cfg_mem_readb,
NULL,
NULL,
};
static CPUWriteMemoryFunc * const fw_cfg_data_mem_write[3] = {
fw_cfg_mem_writeb,
NULL,
NULL,
};
static void fw_cfg_reset(DeviceState *d)
{
FWCfgState *s = DO_UPCAST(FWCfgState, busdev.qdev, d);
fw_cfg_select(s, 0);
}
/* Save restore 32 bit int as uint16_t
This is a Big hack, but it is how the old state did it.
Or we broke compatibility in the state, or we can't use struct tm
*/
static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
{
uint32_t *v = pv;
*v = qemu_get_be16(f);
return 0;
}
static void put_unused(QEMUFile *f, void *pv, size_t size)
{
fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
fprintf(stderr, "This functions shouldn't be called.\n");
}
static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
.name = "int32_as_uint16",
.get = get_uint32_as_uint16,
.put = put_unused,
};
#define VMSTATE_UINT16_HACK(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
static bool is_version_1(void *opaque, int version_id)
{
return version_id == 1;
}
static const VMStateDescription vmstate_fw_cfg = {
.name = "fw_cfg",
.version_id = 2,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT16(cur_entry, FWCfgState),
VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
VMSTATE_END_OF_LIST()
}
};
int fw_cfg_add_bytes(FWCfgState *s, uint16_t key, uint8_t *data, uint32_t len)
{
int arch = !!(key & FW_CFG_ARCH_LOCAL);
key &= FW_CFG_ENTRY_MASK;
if (key >= FW_CFG_MAX_ENTRY)
return 0;
s->entries[arch][key].data = data;
s->entries[arch][key].len = len;
return 1;
}
int fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
{
uint16_t *copy;
copy = qemu_malloc(sizeof(value));
*copy = cpu_to_le16(value);
return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
}
int fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
{
uint32_t *copy;
copy = qemu_malloc(sizeof(value));
*copy = cpu_to_le32(value);
return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
}
int fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
{
uint64_t *copy;
copy = qemu_malloc(sizeof(value));
*copy = cpu_to_le64(value);
return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
}
int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
void *callback_opaque, uint8_t *data, size_t len)
{
int arch = !!(key & FW_CFG_ARCH_LOCAL);
if (!(key & FW_CFG_WRITE_CHANNEL))
return 0;
key &= FW_CFG_ENTRY_MASK;
if (key >= FW_CFG_MAX_ENTRY || len > 65535)
return 0;
s->entries[arch][key].data = data;
s->entries[arch][key].len = len;
s->entries[arch][key].callback_opaque = callback_opaque;
s->entries[arch][key].callback = callback;
return 1;
}
int fw_cfg_add_file(FWCfgState *s, const char *dir, const char *filename,
uint8_t *data, uint32_t len)
{
const char *basename;
int i, index;
if (!s->files) {
int dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
s->files = qemu_mallocz(dsize);
fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, (uint8_t*)s->files, dsize);
}
index = be32_to_cpu(s->files->count);
if (index == FW_CFG_FILE_SLOTS) {
fprintf(stderr, "fw_cfg: out of file slots\n");
return 0;
}
fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len);
basename = strrchr(filename, '/');
if (basename) {
basename++;
} else {
basename = filename;
}
snprintf(s->files->f[index].name, sizeof(s->files->f[index].name),
"%s/%s", dir, basename);
for (i = 0; i < index; i++) {
if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
FW_CFG_DPRINTF("%s: skip duplicate: %s\n", __FUNCTION__,
s->files->f[index].name);
return 1;
}
}
s->files->f[index].size = cpu_to_be32(len);
s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
FW_CFG_DPRINTF("%s: #%d: %s (%d bytes)\n", __FUNCTION__,
index, s->files->f[index].name, len);
s->files->count = cpu_to_be32(index+1);
return 1;
}
FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
target_phys_addr_t ctl_addr, target_phys_addr_t data_addr)
{
DeviceState *dev;
SysBusDevice *d;
FWCfgState *s;
dev = qdev_create(NULL, "fw_cfg");
qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
qdev_prop_set_uint32(dev, "data_iobase", data_port);
qdev_init_nofail(dev);
d = sysbus_from_qdev(dev);
s = DO_UPCAST(FWCfgState, busdev.qdev, dev);
if (ctl_addr) {
sysbus_mmio_map(d, 0, ctl_addr);
}
if (data_addr) {
sysbus_mmio_map(d, 1, data_addr);
}
fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (uint8_t *)"QEMU", 4);
fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
fw_cfg_add_i16(s, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
return s;
}
static int fw_cfg_init1(SysBusDevice *dev)
{
FWCfgState *s = FROM_SYSBUS(FWCfgState, dev);
int io_ctl_memory, io_data_memory;
io_ctl_memory = cpu_register_io_memory(fw_cfg_ctl_mem_read,
fw_cfg_ctl_mem_write, s,
DEVICE_NATIVE_ENDIAN);
sysbus_init_mmio(dev, FW_CFG_SIZE, io_ctl_memory);
io_data_memory = cpu_register_io_memory(fw_cfg_data_mem_read,
fw_cfg_data_mem_write, s,
DEVICE_NATIVE_ENDIAN);
sysbus_init_mmio(dev, FW_CFG_SIZE, io_data_memory);
if (s->ctl_iobase) {
register_ioport_write(s->ctl_iobase, 2, 2, fw_cfg_io_writew, s);
}
if (s->data_iobase) {
register_ioport_read(s->data_iobase, 1, 1, fw_cfg_io_readb, s);
register_ioport_write(s->data_iobase, 1, 1, fw_cfg_io_writeb, s);
}
return 0;
}
static SysBusDeviceInfo fw_cfg_info = {
.init = fw_cfg_init1,
.qdev.name = "fw_cfg",
.qdev.size = sizeof(FWCfgState),
.qdev.vmsd = &vmstate_fw_cfg,
.qdev.reset = fw_cfg_reset,
.qdev.no_user = 1,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("ctl_iobase", FWCfgState, ctl_iobase, -1),
DEFINE_PROP_HEX32("data_iobase", FWCfgState, data_iobase, -1),
DEFINE_PROP_END_OF_LIST(),
},
};
static void fw_cfg_register_devices(void)
{
sysbus_register_withprop(&fw_cfg_info);
}
device_init(fw_cfg_register_devices)