/* * QEMU CUDA support * * Copyright (c) 2004 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. */ #include "vl.h" //#define DEBUG_CUDA //#define DEBUG_CUDA_PACKET /* 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 */ /* 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 { unsigned int 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]; 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; int irq; openpic_t *openpic; 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)) { openpic_set_irq(s->openpic, s->irq, 1); } else { openpic_set_irq(s->openpic, s->irq, 0); } } 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, ticks_per_sec); if (d <= s->counter_value) { counter = d; } else { counter = s->latch - 1 - ((d - s->counter_value) % s->latch); } return counter; } static void set_counter(CUDAState *s, CUDATimer *ti, unsigned int val) { #ifdef DEBUG_CUDA printf("cuda: T%d.counter=%d\n", 1 + (ti->timer == NULL), val); #endif 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, base; /* current counter value */ d = muldiv64(current_time - s->load_time, CUDA_TIMER_FREQ, ticks_per_sec); if (d < s->counter_value) { next_time = s->counter_value + 1; } else { base = ((d - s->counter_value + 1) / s->latch); base = (base * s->latch) + s->counter_value; next_time = base + s->latch; } #if 0 #ifdef DEBUG_CUDA printf("latch=%d counter=%lld delta_next=%lld\n", s->latch, d, next_time - d); #endif #endif next_time = muldiv64(next_time, 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; s->ifr &= ~T1_INT; cuda_update_irq(s); break; case 6: val = s->timers[0].latch & 0xff; break; case 7: val = (s->timers[0].latch >> 8) & 0xff; break; case 8: val = get_counter(&s->timers[1]) & 0xff; 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; break; case 14: val = s->ier; break; default: case 15: val = s->anh; break; } #ifdef DEBUG_CUDA if (addr != 13 || val != 0) printf("cuda: read: reg=0x%x val=%02x\n", addr, val); #endif return val; } static void cuda_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) { CUDAState *s = opaque; addr = (addr >> 9) & 0xf; #ifdef DEBUG_CUDA printf("cuda: write: reg=0x%x val=%02x\n", addr, val); #endif 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: val = val | (get_counter(&s->timers[0]) & 0xff00); set_counter(s, &s->timers[0], val); break; case 5: val = (val << 8) | (get_counter(&s->timers[0]) & 0xff); set_counter(s, &s->timers[0], val); 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); cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock)); break; case 8: val = val | (get_counter(&s->timers[1]) & 0xff00); set_counter(s, &s->timers[1], val); break; case 9: val = (val << 8) | (get_counter(&s->timers[1]) & 0xff); set_counter(s, &s->timers[1], val); 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)) { #ifdef DEBUG_CUDA printf("cuda: send: %02x\n", s->sr); #endif 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++]; #ifdef DEBUG_CUDA printf("cuda: recv: %02x\n", s->sr); #endif /* 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 transfert */ packet_received = (s->data_out_index > 0); /* always an IRQ at the end of transfert */ 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) + (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 ti, autopoll; 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) + (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_GET_TIME: case CUDA_SET_TIME: /* XXX: add time support ? */ ti = time(NULL) + RTC_OFFSET; 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; 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_to_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 *cuda_write[] = { &cuda_writeb, &cuda_writew, &cuda_writel, }; static CPUReadMemoryFunc *cuda_read[] = { &cuda_readb, &cuda_readw, &cuda_readl, }; int cuda_init(openpic_t *openpic, int irq) { CUDAState *s = &cuda_state; int cuda_mem_index; s->openpic = openpic; s->irq = irq; s->timers[0].timer = qemu_new_timer(vm_clock, cuda_timer1, s); s->timers[0].latch = 0x10000; set_counter(s, &s->timers[0], 0xffff); s->timers[1].latch = 0x10000; s->ier = T1_INT | SR_INT; set_counter(s, &s->timers[1], 0xffff); s->adb_poll_timer = qemu_new_timer(vm_clock, cuda_adb_poll, s); cuda_mem_index = cpu_register_io_memory(0, cuda_read, cuda_write, s); return cuda_mem_index; }