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qemu/hw/cuda.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

770 lines
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/*
* QEMU PowerMac CUDA device support
*
* Copyright (c) 2004-2007 Fabrice Bellard
* Copyright (c) 2007 Jocelyn Mayer
*
* 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 "ppc_mac.h"
#include "qemu-timer.h"
#include "sysemu.h"
/* XXX: implement all timer modes */
/* debug CUDA */
//#define DEBUG_CUDA
/* debug CUDA packets */
//#define DEBUG_CUDA_PACKET
#ifdef DEBUG_CUDA
#define CUDA_DPRINTF(fmt, ...) \
do { printf("CUDA: " fmt , ## __VA_ARGS__); } while (0)
#else
#define CUDA_DPRINTF(fmt, ...)
#endif
/* Bits in B data register: all active low */
#define TREQ 0x08 /* Transfer request (input) */
#define TACK 0x10 /* Transfer acknowledge (output) */
#define TIP 0x20 /* Transfer in progress (output) */
/* Bits in ACR */
#define SR_CTRL 0x1c /* Shift register control bits */
#define SR_EXT 0x0c /* Shift on external clock */
#define SR_OUT 0x10 /* Shift out if 1 */
/* Bits in IFR and IER */
#define IER_SET 0x80 /* set bits in IER */
#define IER_CLR 0 /* clear bits in IER */
#define SR_INT 0x04 /* Shift register full/empty */
#define T1_INT 0x40 /* Timer 1 interrupt */
#define T2_INT 0x20 /* Timer 2 interrupt */
/* Bits in ACR */
#define T1MODE 0xc0 /* Timer 1 mode */
#define T1MODE_CONT 0x40 /* continuous interrupts */
/* commands (1st byte) */
#define ADB_PACKET 0
#define CUDA_PACKET 1
#define ERROR_PACKET 2
#define TIMER_PACKET 3
#define POWER_PACKET 4
#define MACIIC_PACKET 5
#define PMU_PACKET 6
/* CUDA commands (2nd byte) */
#define CUDA_WARM_START 0x0
#define CUDA_AUTOPOLL 0x1
#define CUDA_GET_6805_ADDR 0x2
#define CUDA_GET_TIME 0x3
#define CUDA_GET_PRAM 0x7
#define CUDA_SET_6805_ADDR 0x8
#define CUDA_SET_TIME 0x9
#define CUDA_POWERDOWN 0xa
#define CUDA_POWERUP_TIME 0xb
#define CUDA_SET_PRAM 0xc
#define CUDA_MS_RESET 0xd
#define CUDA_SEND_DFAC 0xe
#define CUDA_BATTERY_SWAP_SENSE 0x10
#define CUDA_RESET_SYSTEM 0x11
#define CUDA_SET_IPL 0x12
#define CUDA_FILE_SERVER_FLAG 0x13
#define CUDA_SET_AUTO_RATE 0x14
#define CUDA_GET_AUTO_RATE 0x16
#define CUDA_SET_DEVICE_LIST 0x19
#define CUDA_GET_DEVICE_LIST 0x1a
#define CUDA_SET_ONE_SECOND_MODE 0x1b
#define CUDA_SET_POWER_MESSAGES 0x21
#define CUDA_GET_SET_IIC 0x22
#define CUDA_WAKEUP 0x23
#define CUDA_TIMER_TICKLE 0x24
#define CUDA_COMBINED_FORMAT_IIC 0x25
#define CUDA_TIMER_FREQ (4700000 / 6)
#define CUDA_ADB_POLL_FREQ 50
/* CUDA returns time_t's offset from Jan 1, 1904, not 1970 */
#define RTC_OFFSET 2082844800
typedef struct CUDATimer {
int index;
uint16_t latch;
uint16_t counter_value; /* counter value at load time */
int64_t load_time;
int64_t next_irq_time;
QEMUTimer *timer;
} CUDATimer;
typedef struct CUDAState {
/* cuda registers */
uint8_t b; /* B-side data */
uint8_t a; /* A-side data */
uint8_t dirb; /* B-side direction (1=output) */
uint8_t dira; /* A-side direction (1=output) */
uint8_t sr; /* Shift register */
uint8_t acr; /* Auxiliary control register */
uint8_t pcr; /* Peripheral control register */
uint8_t ifr; /* Interrupt flag register */
uint8_t ier; /* Interrupt enable register */
uint8_t anh; /* A-side data, no handshake */
CUDATimer timers[2];
uint32_t tick_offset;
uint8_t last_b; /* last value of B register */
uint8_t last_acr; /* last value of B register */
int data_in_size;
int data_in_index;
int data_out_index;
qemu_irq irq;
uint8_t autopoll;
uint8_t data_in[128];
uint8_t data_out[16];
QEMUTimer *adb_poll_timer;
} CUDAState;
static CUDAState cuda_state;
ADBBusState adb_bus;
static void cuda_update(CUDAState *s);
static void cuda_receive_packet_from_host(CUDAState *s,
const uint8_t *data, int len);
static void cuda_timer_update(CUDAState *s, CUDATimer *ti,
int64_t current_time);
static void cuda_update_irq(CUDAState *s)
{
if (s->ifr & s->ier & (SR_INT | T1_INT)) {
qemu_irq_raise(s->irq);
} else {
qemu_irq_lower(s->irq);
}
}
static unsigned int get_counter(CUDATimer *s)
{
int64_t d;
unsigned int counter;
d = muldiv64(qemu_get_clock(vm_clock) - s->load_time,
CUDA_TIMER_FREQ, get_ticks_per_sec());
if (s->index == 0) {
/* the timer goes down from latch to -1 (period of latch + 2) */
if (d <= (s->counter_value + 1)) {
counter = (s->counter_value - d) & 0xffff;
} else {
counter = (d - (s->counter_value + 1)) % (s->latch + 2);
counter = (s->latch - counter) & 0xffff;
}
} else {
counter = (s->counter_value - d) & 0xffff;
}
return counter;
}
static void set_counter(CUDAState *s, CUDATimer *ti, unsigned int val)
{
CUDA_DPRINTF("T%d.counter=%d\n", 1 + (ti->timer == NULL), val);
ti->load_time = qemu_get_clock(vm_clock);
ti->counter_value = val;
cuda_timer_update(s, ti, ti->load_time);
}
static int64_t get_next_irq_time(CUDATimer *s, int64_t current_time)
{
int64_t d, next_time;
unsigned int counter;
/* current counter value */
d = muldiv64(current_time - s->load_time,
CUDA_TIMER_FREQ, get_ticks_per_sec());
/* the timer goes down from latch to -1 (period of latch + 2) */
if (d <= (s->counter_value + 1)) {
counter = (s->counter_value - d) & 0xffff;
} else {
counter = (d - (s->counter_value + 1)) % (s->latch + 2);
counter = (s->latch - counter) & 0xffff;
}
/* Note: we consider the irq is raised on 0 */
if (counter == 0xffff) {
next_time = d + s->latch + 1;
} else if (counter == 0) {
next_time = d + s->latch + 2;
} else {
next_time = d + counter;
}
CUDA_DPRINTF("latch=%d counter=%" PRId64 " delta_next=%" PRId64 "\n",
s->latch, d, next_time - d);
next_time = muldiv64(next_time, get_ticks_per_sec(), CUDA_TIMER_FREQ) +
s->load_time;
if (next_time <= current_time)
next_time = current_time + 1;
return next_time;
}
static void cuda_timer_update(CUDAState *s, CUDATimer *ti,
int64_t current_time)
{
if (!ti->timer)
return;
if ((s->acr & T1MODE) != T1MODE_CONT) {
qemu_del_timer(ti->timer);
} else {
ti->next_irq_time = get_next_irq_time(ti, current_time);
qemu_mod_timer(ti->timer, ti->next_irq_time);
}
}
static void cuda_timer1(void *opaque)
{
CUDAState *s = opaque;
CUDATimer *ti = &s->timers[0];
cuda_timer_update(s, ti, ti->next_irq_time);
s->ifr |= T1_INT;
cuda_update_irq(s);
}
static uint32_t cuda_readb(void *opaque, target_phys_addr_t addr)
{
CUDAState *s = opaque;
uint32_t val;
addr = (addr >> 9) & 0xf;
switch(addr) {
case 0:
val = s->b;
break;
case 1:
val = s->a;
break;
case 2:
val = s->dirb;
break;
case 3:
val = s->dira;
break;
case 4:
val = get_counter(&s->timers[0]) & 0xff;
s->ifr &= ~T1_INT;
cuda_update_irq(s);
break;
case 5:
val = get_counter(&s->timers[0]) >> 8;
cuda_update_irq(s);
break;
case 6:
val = s->timers[0].latch & 0xff;
break;
case 7:
/* XXX: check this */
val = (s->timers[0].latch >> 8) & 0xff;
break;
case 8:
val = get_counter(&s->timers[1]) & 0xff;
s->ifr &= ~T2_INT;
break;
case 9:
val = get_counter(&s->timers[1]) >> 8;
break;
case 10:
val = s->sr;
s->ifr &= ~SR_INT;
cuda_update_irq(s);
break;
case 11:
val = s->acr;
break;
case 12:
val = s->pcr;
break;
case 13:
val = s->ifr;
if (s->ifr & s->ier)
val |= 0x80;
break;
case 14:
val = s->ier | 0x80;
break;
default:
case 15:
val = s->anh;
break;
}
if (addr != 13 || val != 0) {
CUDA_DPRINTF("read: reg=0x%x val=%02x\n", (int)addr, val);
}
return val;
}
static void cuda_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
CUDAState *s = opaque;
addr = (addr >> 9) & 0xf;
CUDA_DPRINTF("write: reg=0x%x val=%02x\n", (int)addr, val);
switch(addr) {
case 0:
s->b = val;
cuda_update(s);
break;
case 1:
s->a = val;
break;
case 2:
s->dirb = val;
break;
case 3:
s->dira = val;
break;
case 4:
s->timers[0].latch = (s->timers[0].latch & 0xff00) | val;
cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
break;
case 5:
s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8);
s->ifr &= ~T1_INT;
set_counter(s, &s->timers[0], s->timers[0].latch);
break;
case 6:
s->timers[0].latch = (s->timers[0].latch & 0xff00) | val;
cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
break;
case 7:
s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8);
s->ifr &= ~T1_INT;
cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
break;
case 8:
s->timers[1].latch = val;
set_counter(s, &s->timers[1], val);
break;
case 9:
set_counter(s, &s->timers[1], (val << 8) | s->timers[1].latch);
break;
case 10:
s->sr = val;
break;
case 11:
s->acr = val;
cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
cuda_update(s);
break;
case 12:
s->pcr = val;
break;
case 13:
/* reset bits */
s->ifr &= ~val;
cuda_update_irq(s);
break;
case 14:
if (val & IER_SET) {
/* set bits */
s->ier |= val & 0x7f;
} else {
/* reset bits */
s->ier &= ~val;
}
cuda_update_irq(s);
break;
default:
case 15:
s->anh = val;
break;
}
}
/* NOTE: TIP and TREQ are negated */
static void cuda_update(CUDAState *s)
{
int packet_received, len;
packet_received = 0;
if (!(s->b & TIP)) {
/* transfer requested from host */
if (s->acr & SR_OUT) {
/* data output */
if ((s->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
if (s->data_out_index < sizeof(s->data_out)) {
CUDA_DPRINTF("send: %02x\n", s->sr);
s->data_out[s->data_out_index++] = s->sr;
s->ifr |= SR_INT;
cuda_update_irq(s);
}
}
} else {
if (s->data_in_index < s->data_in_size) {
/* data input */
if ((s->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
s->sr = s->data_in[s->data_in_index++];
CUDA_DPRINTF("recv: %02x\n", s->sr);
/* indicate end of transfer */
if (s->data_in_index >= s->data_in_size) {
s->b = (s->b | TREQ);
}
s->ifr |= SR_INT;
cuda_update_irq(s);
}
}
}
} else {
/* no transfer requested: handle sync case */
if ((s->last_b & TIP) && (s->b & TACK) != (s->last_b & TACK)) {
/* update TREQ state each time TACK change state */
if (s->b & TACK)
s->b = (s->b | TREQ);
else
s->b = (s->b & ~TREQ);
s->ifr |= SR_INT;
cuda_update_irq(s);
} else {
if (!(s->last_b & TIP)) {
/* handle end of host to cuda transfer */
packet_received = (s->data_out_index > 0);
/* always an IRQ at the end of transfer */
s->ifr |= SR_INT;
cuda_update_irq(s);
}
/* signal if there is data to read */
if (s->data_in_index < s->data_in_size) {
s->b = (s->b & ~TREQ);
}
}
}
s->last_acr = s->acr;
s->last_b = s->b;
/* NOTE: cuda_receive_packet_from_host() can call cuda_update()
recursively */
if (packet_received) {
len = s->data_out_index;
s->data_out_index = 0;
cuda_receive_packet_from_host(s, s->data_out, len);
}
}
static void cuda_send_packet_to_host(CUDAState *s,
const uint8_t *data, int len)
{
#ifdef DEBUG_CUDA_PACKET
{
int i;
printf("cuda_send_packet_to_host:\n");
for(i = 0; i < len; i++)
printf(" %02x", data[i]);
printf("\n");
}
#endif
memcpy(s->data_in, data, len);
s->data_in_size = len;
s->data_in_index = 0;
cuda_update(s);
s->ifr |= SR_INT;
cuda_update_irq(s);
}
static void cuda_adb_poll(void *opaque)
{
CUDAState *s = opaque;
uint8_t obuf[ADB_MAX_OUT_LEN + 2];
int olen;
olen = adb_poll(&adb_bus, obuf + 2);
if (olen > 0) {
obuf[0] = ADB_PACKET;
obuf[1] = 0x40; /* polled data */
cuda_send_packet_to_host(s, obuf, olen + 2);
}
qemu_mod_timer(s->adb_poll_timer,
qemu_get_clock(vm_clock) +
(get_ticks_per_sec() / CUDA_ADB_POLL_FREQ));
}
static void cuda_receive_packet(CUDAState *s,
const uint8_t *data, int len)
{
uint8_t obuf[16];
int autopoll;
uint32_t ti;
switch(data[0]) {
case CUDA_AUTOPOLL:
autopoll = (data[1] != 0);
if (autopoll != s->autopoll) {
s->autopoll = autopoll;
if (autopoll) {
qemu_mod_timer(s->adb_poll_timer,
qemu_get_clock(vm_clock) +
(get_ticks_per_sec() / CUDA_ADB_POLL_FREQ));
} else {
qemu_del_timer(s->adb_poll_timer);
}
}
obuf[0] = CUDA_PACKET;
obuf[1] = data[1];
cuda_send_packet_to_host(s, obuf, 2);
break;
case CUDA_SET_TIME:
ti = (((uint32_t)data[1]) << 24) + (((uint32_t)data[2]) << 16) + (((uint32_t)data[3]) << 8) + data[4];
s->tick_offset = ti - (qemu_get_clock(vm_clock) / get_ticks_per_sec());
obuf[0] = CUDA_PACKET;
obuf[1] = 0;
obuf[2] = 0;
cuda_send_packet_to_host(s, obuf, 3);
break;
case CUDA_GET_TIME:
ti = s->tick_offset + (qemu_get_clock(vm_clock) / get_ticks_per_sec());
obuf[0] = CUDA_PACKET;
obuf[1] = 0;
obuf[2] = 0;
obuf[3] = ti >> 24;
obuf[4] = ti >> 16;
obuf[5] = ti >> 8;
obuf[6] = ti;
cuda_send_packet_to_host(s, obuf, 7);
break;
case CUDA_FILE_SERVER_FLAG:
case CUDA_SET_DEVICE_LIST:
case CUDA_SET_AUTO_RATE:
case CUDA_SET_POWER_MESSAGES:
obuf[0] = CUDA_PACKET;
obuf[1] = 0;
cuda_send_packet_to_host(s, obuf, 2);
break;
case CUDA_POWERDOWN:
obuf[0] = CUDA_PACKET;
obuf[1] = 0;
cuda_send_packet_to_host(s, obuf, 2);
qemu_system_shutdown_request();
break;
case CUDA_RESET_SYSTEM:
obuf[0] = CUDA_PACKET;
obuf[1] = 0;
cuda_send_packet_to_host(s, obuf, 2);
qemu_system_reset_request();
break;
default:
break;
}
}
static void cuda_receive_packet_from_host(CUDAState *s,
const uint8_t *data, int len)
{
#ifdef DEBUG_CUDA_PACKET
{
int i;
printf("cuda_receive_packet_from_host:\n");
for(i = 0; i < len; i++)
printf(" %02x", data[i]);
printf("\n");
}
#endif
switch(data[0]) {
case ADB_PACKET:
{
uint8_t obuf[ADB_MAX_OUT_LEN + 2];
int olen;
olen = adb_request(&adb_bus, obuf + 2, data + 1, len - 1);
if (olen > 0) {
obuf[0] = ADB_PACKET;
obuf[1] = 0x00;
} else {
/* error */
obuf[0] = ADB_PACKET;
obuf[1] = -olen;
olen = 0;
}
cuda_send_packet_to_host(s, obuf, olen + 2);
}
break;
case CUDA_PACKET:
cuda_receive_packet(s, data + 1, len - 1);
break;
}
}
static void cuda_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
{
}
static void cuda_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
}
static uint32_t cuda_readw (void *opaque, target_phys_addr_t addr)
{
return 0;
}
static uint32_t cuda_readl (void *opaque, target_phys_addr_t addr)
{
return 0;
}
static CPUWriteMemoryFunc * const cuda_write[] = {
&cuda_writeb,
&cuda_writew,
&cuda_writel,
};
static CPUReadMemoryFunc * const cuda_read[] = {
&cuda_readb,
&cuda_readw,
&cuda_readl,
};
static void cuda_save_timer(QEMUFile *f, CUDATimer *s)
{
qemu_put_be16s(f, &s->latch);
qemu_put_be16s(f, &s->counter_value);
qemu_put_sbe64s(f, &s->load_time);
qemu_put_sbe64s(f, &s->next_irq_time);
if (s->timer)
qemu_put_timer(f, s->timer);
}
static void cuda_save(QEMUFile *f, void *opaque)
{
CUDAState *s = (CUDAState *)opaque;
qemu_put_ubyte(f, s->b);
qemu_put_ubyte(f, s->a);
qemu_put_ubyte(f, s->dirb);
qemu_put_ubyte(f, s->dira);
qemu_put_ubyte(f, s->sr);
qemu_put_ubyte(f, s->acr);
qemu_put_ubyte(f, s->pcr);
qemu_put_ubyte(f, s->ifr);
qemu_put_ubyte(f, s->ier);
qemu_put_ubyte(f, s->anh);
qemu_put_sbe32s(f, &s->data_in_size);
qemu_put_sbe32s(f, &s->data_in_index);
qemu_put_sbe32s(f, &s->data_out_index);
qemu_put_ubyte(f, s->autopoll);
qemu_put_buffer(f, s->data_in, sizeof(s->data_in));
qemu_put_buffer(f, s->data_out, sizeof(s->data_out));
qemu_put_be32s(f, &s->tick_offset);
cuda_save_timer(f, &s->timers[0]);
cuda_save_timer(f, &s->timers[1]);
}
static void cuda_load_timer(QEMUFile *f, CUDATimer *s)
{
qemu_get_be16s(f, &s->latch);
qemu_get_be16s(f, &s->counter_value);
qemu_get_sbe64s(f, &s->load_time);
qemu_get_sbe64s(f, &s->next_irq_time);
if (s->timer)
qemu_get_timer(f, s->timer);
}
static int cuda_load(QEMUFile *f, void *opaque, int version_id)
{
CUDAState *s = (CUDAState *)opaque;
if (version_id != 1)
return -EINVAL;
s->b = qemu_get_ubyte(f);
s->a = qemu_get_ubyte(f);
s->dirb = qemu_get_ubyte(f);
s->dira = qemu_get_ubyte(f);
s->sr = qemu_get_ubyte(f);
s->acr = qemu_get_ubyte(f);
s->pcr = qemu_get_ubyte(f);
s->ifr = qemu_get_ubyte(f);
s->ier = qemu_get_ubyte(f);
s->anh = qemu_get_ubyte(f);
qemu_get_sbe32s(f, &s->data_in_size);
qemu_get_sbe32s(f, &s->data_in_index);
qemu_get_sbe32s(f, &s->data_out_index);
s->autopoll = qemu_get_ubyte(f);
qemu_get_buffer(f, s->data_in, sizeof(s->data_in));
qemu_get_buffer(f, s->data_out, sizeof(s->data_out));
qemu_get_be32s(f, &s->tick_offset);
cuda_load_timer(f, &s->timers[0]);
cuda_load_timer(f, &s->timers[1]);
return 0;
}
static void cuda_reset(void *opaque)
{
CUDAState *s = opaque;
s->b = 0;
s->a = 0;
s->dirb = 0;
s->dira = 0;
s->sr = 0;
s->acr = 0;
s->pcr = 0;
s->ifr = 0;
s->ier = 0;
// s->ier = T1_INT | SR_INT;
s->anh = 0;
s->data_in_size = 0;
s->data_in_index = 0;
s->data_out_index = 0;
s->autopoll = 0;
s->timers[0].latch = 0xffff;
set_counter(s, &s->timers[0], 0xffff);
s->timers[1].latch = 0;
set_counter(s, &s->timers[1], 0xffff);
}
void cuda_init (int *cuda_mem_index, qemu_irq irq)
{
struct tm tm;
CUDAState *s = &cuda_state;
s->irq = irq;
s->timers[0].index = 0;
s->timers[0].timer = qemu_new_timer(vm_clock, cuda_timer1, s);
s->timers[1].index = 1;
qemu_get_timedate(&tm, 0);
s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
s->adb_poll_timer = qemu_new_timer(vm_clock, cuda_adb_poll, s);
*cuda_mem_index = cpu_register_io_memory(cuda_read, cuda_write, s,
DEVICE_NATIVE_ENDIAN);
register_savevm(NULL, "cuda", -1, 1, cuda_save, cuda_load, s);
qemu_register_reset(cuda_reset, s);
}
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