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dpavlin |
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/* |
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* Copyright (C) 2003-2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_ps2_stuff.c,v 1.18 2005/02/26 10:51:01 debug Exp $ |
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* |
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* Playstation 2 misc. stuff: |
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* |
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* offset 0x0000 timer control |
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* offset 0x8000 DMA controller |
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* offset 0xf000 Interrupt register |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "cpu.h" |
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#include "devices.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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#include "ee_timerreg.h" |
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#include "ps2_dmacreg.h" |
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#define TICK_STEPS_SHIFT 16 |
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/* NOTE/TODO: This should be the same as in ps2_gs: */ |
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#define DEV_PS2_GIF_FAKE_BASE 0x50000000 |
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/* |
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* dev_ps2_stuff_tick(): |
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*/ |
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void dev_ps2_stuff_tick(struct cpu *cpu, void *extra) |
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{ |
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struct ps2_data *d = extra; |
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/* Count-up Enable: TODO: by how much? */ |
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if (d->timer_mode[0] & T_MODE_CUE) |
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d->timer_count[0] ++; |
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/* TODO: right now this interrupts every now and then, this should |
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be 100 Hz in NetBSD, but isn't */ |
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if (d->timer_mode[0] & (T_MODE_CMPE | T_MODE_OVFE)) { |
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/* Zero return: */ |
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if (d->timer_mode[0] & T_MODE_ZRET) |
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d->timer_count[0] = 0; |
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cpu_interrupt(cpu, 0x200 +8); /* 0x200 is timer0 */ |
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} |
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} |
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/* |
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* dev_ps2_stuff_access(): |
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*/ |
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int dev_ps2_stuff_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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uint64_t idata = 0, odata = 0; |
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int regnr = 0; |
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struct ps2_data *d = extra; |
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int timer_nr = 0; |
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idata = memory_readmax64(cpu, data, len); |
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if (relative_addr >= 0x8000 && relative_addr < 0x8000 + DMAC_REGSIZE) { |
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regnr = (relative_addr - 0x8000) / 16; |
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if (writeflag == MEM_READ) |
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odata = d->dmac_reg[regnr]; |
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else |
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d->dmac_reg[regnr] = idata; |
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} |
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/* |
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* Timer control: |
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* The four timers are at offsets 0, 0x800, 0x1000, and 0x1800. |
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*/ |
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if (relative_addr < TIMER_REGSIZE) { |
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/* 0, 1, 2, or 3 */ |
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timer_nr = (relative_addr & 0x1800) >> 11; |
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relative_addr &= (TIMER_OFS-1); |
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} |
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switch (relative_addr) { |
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case 0x0000: /* timer count */ |
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if (writeflag == MEM_READ) { |
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odata = d->timer_count[timer_nr]; |
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if (timer_nr == 0) { |
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/* :-) TODO: remove this? */ |
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d->timer_count[timer_nr] ++; |
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} |
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debug("[ ps2_stuff: read timer %i count: 0x%llx ]\n", |
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timer_nr, (long long)odata); |
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} else { |
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d->timer_count[timer_nr] = idata; |
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debug("[ ps2_stuff: write timer %i count: 0x%llx ]\n", |
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timer_nr, (long long)idata); |
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} |
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break; |
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case 0x0010: /* timer mode */ |
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if (writeflag == MEM_READ) { |
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odata = d->timer_mode[timer_nr]; |
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debug("[ ps2_stuff: read timer %i mode: 0x%llx ]\n", |
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timer_nr, (long long)odata); |
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} else { |
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d->timer_mode[timer_nr] = idata; |
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debug("[ ps2_stuff: write timer %i mode: 0x%llx ]\n", |
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timer_nr, (long long)idata); |
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} |
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break; |
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case 0x0020: /* timer comp */ |
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if (writeflag == MEM_READ) { |
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odata = d->timer_comp[timer_nr]; |
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debug("[ ps2_stuff: read timer %i comp: 0x%llx ]\n", |
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timer_nr, (long long)odata); |
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} else { |
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d->timer_comp[timer_nr] = idata; |
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debug("[ ps2_stuff: write timer %i comp: 0x%llx ]\n", |
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timer_nr, (long long)idata); |
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} |
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break; |
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case 0x0030: /* timer hold */ |
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if (writeflag == MEM_READ) { |
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odata = d->timer_hold[timer_nr]; |
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debug("[ ps2_stuff: read timer %i hold: 0x%llx ]\n", |
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timer_nr, (long long)odata); |
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if (timer_nr >= 2) |
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fatal("[ WARNING: ps2_stuff: read from non-" |
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"existant timer %i hold register ]\n"); |
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} else { |
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d->timer_hold[timer_nr] = idata; |
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debug("[ ps2_stuff: write timer %i hold: 0x%llx ]\n", |
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timer_nr, (long long)idata); |
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if (timer_nr >= 2) |
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fatal("[ WARNING: ps2_stuff: write to " |
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"non-existant timer %i hold register ]\n", |
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timer_nr); |
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} |
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break; |
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case 0x8000 + D2_CHCR_REG: |
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if (writeflag==MEM_READ) { |
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odata = d->dmac_reg[regnr]; |
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/* debug("[ ps2_stuff: dmac read from D2_CHCR " |
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"(0x%llx) ]\n", (long long)d->dmac_reg[regnr]); */ |
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} else { |
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/* debug("[ ps2_stuff: dmac write to D2_CHCR, " |
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"data 0x%016llx ]\n", (long long) idata); */ |
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if (idata & D_CHCR_STR) { |
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int length = d->dmac_reg[D2_QWC_REG/0x10] * 16; |
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uint64_t from_addr = d->dmac_reg[ |
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D2_MADR_REG/0x10]; |
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uint64_t to_addr = d->dmac_reg[ |
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D2_TADR_REG/0x10]; |
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unsigned char *copy_buf; |
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debug("[ ps2_stuff: dmac [ch2] transfer addr=" |
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"0x%016llx len=0x%lx ]\n", (long long) |
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d->dmac_reg[D2_MADR_REG/0x10], |
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(long)length); |
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copy_buf = malloc(length); |
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if (copy_buf == NULL) { |
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fprintf(stderr, "out of memory in " |
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"dev_ps2_stuff_access()\n"); |
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exit(1); |
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} |
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cpu->memory_rw(cpu, cpu->mem, from_addr, |
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copy_buf, length, MEM_READ, |
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CACHE_NONE | PHYSICAL); |
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cpu->memory_rw(cpu, cpu->mem, |
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d->other_memory_base[DMA_CH_GIF] + to_addr, |
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copy_buf, length, MEM_WRITE, |
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CACHE_NONE | PHYSICAL); |
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free(copy_buf); |
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/* Done with the transfer: */ |
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d->dmac_reg[D2_QWC_REG/0x10] = 0; |
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idata &= ~D_CHCR_STR; |
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cpu_interrupt(cpu, (1 << 18) +8); |
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/* 1<<18 is dma2 */ |
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} else |
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debug("[ ps2_stuff: dmac [ch2] stopping " |
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"transfer ]\n"); |
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d->dmac_reg[regnr] = idata; |
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return 1; |
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} |
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break; |
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case 0x8000 + D2_QWC_REG: |
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case 0x8000 + D2_MADR_REG: |
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case 0x8000 + D2_TADR_REG: |
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/* no debug output */ |
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break; |
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case 0xe010: /* dmac interrupt status (and mask, */ |
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/* the upper 16 bits) */ |
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if (writeflag == MEM_WRITE) { |
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uint32_t oldmask = d->dmac_reg[regnr] & 0xffff0000; |
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/* Clear out those bits that are set in idata: */ |
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d->dmac_reg[regnr] &= ~idata; |
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d->dmac_reg[regnr] &= 0xffff; |
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d->dmac_reg[regnr] |= oldmask; |
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if (((d->dmac_reg[regnr] & 0xffff) & |
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((d->dmac_reg[regnr]>>16) & 0xffff)) == 0) { |
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/* irq 3 is the DMAC */ |
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cpu_interrupt_ack(cpu, 3); |
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} |
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} else { |
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/* Hm... make it seem like the mask bits are (at |
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least as much as) the interrupt assertions: */ |
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odata = d->dmac_reg[regnr]; |
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odata |= (odata << 16); |
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} |
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break; |
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case 0xf000: /* interrupt register */ |
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if (writeflag == MEM_READ) { |
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odata = d->intr; |
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debug("[ ps2_stuff: read from Interrupt Register:" |
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" 0x%llx ]\n", (long long)odata); |
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/* TODO: these are possibly not correct, |
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but makes NetBSD run easier. */ |
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d->intr = 0; |
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cpu_interrupt_ack(cpu, 2); |
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} else { |
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debug("[ ps2_stuff: write to Interrupt Register: " |
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"0x%llx ]\n", (long long)idata); |
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/* Clear out those bits that are set in idata: */ |
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d->intr &= ~idata; |
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if (idata == 0) |
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d->intr = 0; |
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/* TODO: which of the above and below is best? */ |
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if (d->intr == 0) { |
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/* Hm... idata +8); */ |
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cpu_interrupt_ack(cpu, 2); |
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} |
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} |
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break; |
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case 0xf010: /* interrupt mask */ |
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if (writeflag == MEM_READ) |
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odata = d->imask; |
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else { |
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d->imask = idata; |
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} |
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break; |
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default: |
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if (writeflag==MEM_READ) { |
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debug("[ ps2_stuff: read from addr 0x%x: 0x%llx ]\n", |
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(int)relative_addr, (long long)odata); |
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} else { |
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debug("[ ps2_stuff: write to addr 0x%x: 0x%llx ]\n", |
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(int)relative_addr, (long long)idata); |
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} |
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} |
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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return 1; |
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} |
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/* |
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* dev_ps2_stuff_init(): |
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*/ |
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struct ps2_data *dev_ps2_stuff_init(struct machine *machine, |
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struct memory *mem, uint64_t baseaddr) |
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{ |
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struct ps2_data *d; |
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d = malloc(sizeof(struct ps2_data)); |
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct ps2_data)); |
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d->other_memory_base[DMA_CH_GIF] = DEV_PS2_GIF_FAKE_BASE; |
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memory_device_register(mem, "ps2_stuff", baseaddr, |
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DEV_PS2_STUFF_LENGTH, dev_ps2_stuff_access, d, MEM_DEFAULT, NULL); |
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machine_add_tickfunction(machine, |
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dev_ps2_stuff_tick, d, TICK_STEPS_SHIFT); |
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return d; |
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} |
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