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/* |
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* Copyright (C) 2004-2006 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_wdc.c,v 1.63 2006/02/18 13:15:21 debug Exp $ |
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* |
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* Standard "wdc" IDE controller. |
| 31 |
*/ |
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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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|
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#include "cpu.h" |
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#include "device.h" |
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#include "diskimage.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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|
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#include "wdcreg.h" |
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|
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#define DEV_WDC_LENGTH 8 |
| 47 |
#define WDC_TICK_SHIFT 14 |
| 48 |
#define WDC_MAX_SECTORS 512 |
| 49 |
#define WDC_INBUF_SIZE (512*(WDC_MAX_SECTORS+1)) |
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|
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/* |
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* INT_DELAY: This is an old hack which only exists because (some versions of) |
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* NetBSD for hpcmips have interrupt problems. These problems are probably not |
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* specific to GXemul, but are also triggered on real hardware. |
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* |
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* See the following URL for more info: |
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* http://mail-index.netbsd.org/port-hpcmips/2004/12/30/0003.html |
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* |
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* NetBSD/malta also bugs out if wdc interrupts come too quickly. Hm. |
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*/ |
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#define INT_DELAY 1 |
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|
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extern int quiet_mode; |
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|
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/* #define debug fatal */ |
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|
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struct wdc_data { |
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int irq_nr; |
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int addr_mult; |
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int base_drive; |
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int data_debug; |
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|
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/* Cached values: */ |
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int cyls[2]; |
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int heads[2]; |
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int sectors_per_track[2]; |
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|
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unsigned char *inbuf; |
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int inbuf_head; |
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int inbuf_tail; |
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|
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int delayed_interrupt; |
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int int_asserted; |
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|
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int write_in_progress; |
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int write_count; |
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int64_t write_offset; |
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|
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int error; |
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int precomp; |
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int seccnt; |
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int sector; |
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int cyl_lo; |
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int cyl_hi; |
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int sectorsize; |
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int lba; |
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int drive; |
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int head; |
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int cur_command; |
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|
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int atapi_cmd_in_progress; |
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int atapi_phase; |
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struct scsi_transfer *atapi_st; |
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int atapi_len; |
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size_t atapi_received; |
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|
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unsigned char identify_struct[512]; |
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}; |
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|
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|
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#define COMMAND_RESET 0x100 |
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|
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|
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/* |
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* dev_wdc_tick(): |
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*/ |
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void dev_wdc_tick(struct cpu *cpu, void *extra) |
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{ |
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struct wdc_data *d = extra; |
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int old_di = d->delayed_interrupt; |
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|
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if (d->delayed_interrupt) |
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d->delayed_interrupt --; |
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|
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if (old_di == 1 || d->int_asserted) { |
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cpu_interrupt(cpu, d->irq_nr); |
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d->int_asserted = 1; |
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} |
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} |
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|
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|
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/* |
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* wdc_addtoinbuf(): |
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* |
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* Write to the inbuf at its head, read at its tail. |
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*/ |
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static void wdc_addtoinbuf(struct wdc_data *d, int c) |
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{ |
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d->inbuf[d->inbuf_head] = c; |
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|
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d->inbuf_head = (d->inbuf_head + 1) % WDC_INBUF_SIZE; |
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if (d->inbuf_head == d->inbuf_tail) |
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fatal("[ wdc_addtoinbuf(): WARNING! wdc inbuf overrun!" |
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" Increase WDC_MAX_SECTORS. ]\n"); |
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} |
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|
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|
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/* |
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* wdc_get_inbuf(): |
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* |
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* Read from the tail of inbuf. |
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*/ |
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static uint64_t wdc_get_inbuf(struct wdc_data *d) |
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{ |
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int c = d->inbuf[d->inbuf_tail]; |
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|
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if (d->inbuf_head == d->inbuf_tail) { |
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fatal("[ wdc: WARNING! someone is reading too much from the " |
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"wdc inbuf! ]\n"); |
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return -1; |
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} |
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|
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d->inbuf_tail = (d->inbuf_tail + 1) % WDC_INBUF_SIZE; |
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return c; |
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} |
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|
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|
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/* |
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* wdc_initialize_identify_struct(): |
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*/ |
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static void wdc_initialize_identify_struct(struct cpu *cpu, struct wdc_data *d) |
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{ |
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uint64_t total_size; |
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int flags, cdrom = 0; |
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char namebuf[40]; |
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|
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total_size = diskimage_getsize(cpu->machine, d->drive + d->base_drive, |
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DISKIMAGE_IDE); |
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if (diskimage_is_a_cdrom(cpu->machine, d->drive + d->base_drive, |
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DISKIMAGE_IDE)) |
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cdrom = 1; |
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|
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memset(d->identify_struct, 0, sizeof(d->identify_struct)); |
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|
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/* Offsets are in 16-bit WORDS! High byte, then low. */ |
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|
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/* 0: general flags */ |
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flags = 1 << 6; /* Fixed */ |
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if (cdrom) |
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flags = 0x8580; /* ATAPI, CDROM, removable */ |
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d->identify_struct[2 * 0 + 0] = flags >> 8; |
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d->identify_struct[2 * 0 + 1] = flags; |
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|
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/* 1: nr of cylinders */ |
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d->identify_struct[2 * 1 + 0] = d->cyls[d->drive] >> 8; |
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d->identify_struct[2 * 1 + 1] = d->cyls[d->drive]; |
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|
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/* 3: nr of heads */ |
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d->identify_struct[2 * 3 + 0] = d->heads[d->drive] >> 8; |
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d->identify_struct[2 * 3 + 1] = d->heads[d->drive]; |
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|
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/* 6: sectors per track */ |
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d->identify_struct[2 * 6 + 0] = d->sectors_per_track[d->drive] >> 8; |
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d->identify_struct[2 * 6 + 1] = d->sectors_per_track[d->drive]; |
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|
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/* 10-19: Serial number */ |
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memcpy(&d->identify_struct[2 * 10], "#0 ", 20); |
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|
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/* 23-26: Firmware version */ |
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memcpy(&d->identify_struct[2 * 23], "1.0 ", 8); |
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|
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/* 27-46: Model number */ |
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if (diskimage_getname(cpu->machine, d->drive + d->base_drive, |
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DISKIMAGE_IDE, namebuf, sizeof(namebuf))) { |
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size_t i; |
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for (i=0; i<sizeof(namebuf); i++) |
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if (namebuf[i] == 0) { |
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for (; i<sizeof(namebuf); i++) |
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namebuf[i] = ' '; |
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break; |
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} |
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memcpy(&d->identify_struct[2 * 27], namebuf, 40); |
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} else |
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memcpy(&d->identify_struct[2 * 27], |
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"Fake GXemul IDE disk ", 40); |
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|
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/* 47: max sectors per multitransfer */ |
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d->identify_struct[2 * 47 + 0] = 0x80; |
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d->identify_struct[2 * 47 + 1] = 128; |
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|
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/* 49: capabilities: */ |
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/* (0x200 = LBA, 0x100 = DMA support.) */ |
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d->identify_struct[2 * 49 + 0] = 0; |
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d->identify_struct[2 * 49 + 1] = 0; |
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|
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/* 51: PIO timing mode. */ |
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d->identify_struct[2 * 51 + 0] = 0x00; /* ? */ |
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d->identify_struct[2 * 51 + 1] = 0x00; |
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|
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/* 53: 0x02 = fields 64-70 valid, 0x01 = fields 54-58 valid */ |
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d->identify_struct[2 * 53 + 0] = 0x00; |
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d->identify_struct[2 * 53 + 1] = 0x02; |
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|
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/* 57-58: current capacity in sectors */ |
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d->identify_struct[2 * 57 + 0] = ((total_size / 512) >> 24) % 255; |
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d->identify_struct[2 * 57 + 1] = ((total_size / 512) >> 16) % 255; |
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d->identify_struct[2 * 58 + 0] = ((total_size / 512) >> 8) % 255; |
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d->identify_struct[2 * 58 + 1] = (total_size / 512) & 255; |
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|
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/* 60-61: total nr of addressable sectors */ |
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d->identify_struct[2 * 60 + 0] = ((total_size / 512) >> 24) % 255; |
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d->identify_struct[2 * 60 + 1] = ((total_size / 512) >> 16) % 255; |
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d->identify_struct[2 * 61 + 0] = ((total_size / 512) >> 8) % 255; |
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d->identify_struct[2 * 61 + 1] = (total_size / 512) & 255; |
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|
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/* 64: Advanced PIO mode support. 0x02 = mode4, 0x01 = mode3 */ |
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d->identify_struct[2 * 64 + 0] = 0x00; |
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d->identify_struct[2 * 64 + 1] = 0x03; |
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|
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/* 67, 68: PIO timing */ |
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d->identify_struct[2 * 67 + 0] = 0; |
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d->identify_struct[2 * 67 + 1] = 120; |
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d->identify_struct[2 * 68 + 0] = 0; |
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d->identify_struct[2 * 68 + 1] = 120; |
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} |
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|
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|
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/* |
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* wdc__read(): |
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*/ |
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void wdc__read(struct cpu *cpu, struct wdc_data *d) |
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{ |
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#define MAX_SECTORS_PER_CHUNK 64 |
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const int max_sectors_per_chunk = MAX_SECTORS_PER_CHUNK; |
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unsigned char buf[512 * MAX_SECTORS_PER_CHUNK]; |
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int i, cyl = d->cyl_hi * 256+ d->cyl_lo; |
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int count = d->seccnt? d->seccnt : 256; |
| 278 |
uint64_t offset = 512 * (d->sector - 1 |
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+ d->head * d->sectors_per_track[d->drive] + |
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d->heads[d->drive] * d->sectors_per_track[d->drive] * cyl); |
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|
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#if 0 |
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/* LBA: */ |
| 284 |
if (d->lba) |
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offset = 512 * (((d->head & 0xf) << 24) + (cyl << 8) |
| 286 |
+ d->sector); |
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printf("WDC read from offset %lli\n", (long long)offset); |
| 288 |
#endif |
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|
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while (count > 0) { |
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int to_read = count > max_sectors_per_chunk? |
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max_sectors_per_chunk : count; |
| 293 |
|
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/* TODO: result code from the read? */ |
| 295 |
|
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if (d->inbuf_head + 512 * to_read <= WDC_INBUF_SIZE) { |
| 297 |
diskimage_access(cpu->machine, d->drive + d->base_drive, |
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DISKIMAGE_IDE, 0, offset, |
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d->inbuf + d->inbuf_head, 512 * to_read); |
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d->inbuf_head += 512 * to_read; |
| 301 |
if (d->inbuf_head == WDC_INBUF_SIZE) |
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d->inbuf_head = 0; |
| 303 |
} else { |
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diskimage_access(cpu->machine, d->drive + d->base_drive, |
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DISKIMAGE_IDE, 0, offset, buf, 512 * to_read); |
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for (i=0; i<512 * to_read; i++) |
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wdc_addtoinbuf(d, buf[i]); |
| 308 |
} |
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|
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offset += 512 * to_read; |
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count -= to_read; |
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} |
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|
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d->delayed_interrupt = INT_DELAY; |
| 315 |
} |
| 316 |
|
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|
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/* |
| 319 |
* wdc__write(): |
| 320 |
*/ |
| 321 |
void wdc__write(struct cpu *cpu, struct wdc_data *d) |
| 322 |
{ |
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int cyl = d->cyl_hi * 256+ d->cyl_lo; |
| 324 |
int count = d->seccnt? d->seccnt : 256; |
| 325 |
uint64_t offset = 512 * (d->sector - 1 |
| 326 |
+ d->head * d->sectors_per_track[d->drive] + |
| 327 |
d->heads[d->drive] * d->sectors_per_track[d->drive] * cyl); |
| 328 |
#if 0 |
| 329 |
/* LBA: */ |
| 330 |
if (d->lba) |
| 331 |
offset = 512 * (((d->head & 0xf) << 24) + |
| 332 |
(cyl << 8) + d->sector); |
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printf("WDC write to offset %lli\n", (long long)offset); |
| 334 |
#endif |
| 335 |
|
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d->write_in_progress = d->cur_command; |
| 337 |
d->write_count = count; |
| 338 |
d->write_offset = offset; |
| 339 |
|
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/* TODO: result code? */ |
| 341 |
} |
| 342 |
|
| 343 |
|
| 344 |
/* |
| 345 |
* status_byte(): |
| 346 |
* |
| 347 |
* Return a reasonable status byte corresponding to the controller's current |
| 348 |
* state. |
| 349 |
*/ |
| 350 |
static int status_byte(struct wdc_data *d, struct cpu *cpu) |
| 351 |
{ |
| 352 |
int odata = 0; |
| 353 |
if (diskimage_exist(cpu->machine, d->drive + d->base_drive, |
| 354 |
DISKIMAGE_IDE)) |
| 355 |
odata |= WDCS_DRDY | WDCS_DSC; |
| 356 |
if (d->inbuf_head != d->inbuf_tail) |
| 357 |
odata |= WDCS_DRQ; |
| 358 |
if (d->write_in_progress) |
| 359 |
odata |= WDCS_DRQ; |
| 360 |
if (d->error) |
| 361 |
odata |= WDCS_ERR; |
| 362 |
if (d->atapi_cmd_in_progress && (d->atapi_phase & WDCS_DRQ)) { |
| 363 |
odata |= WDCS_DRQ; |
| 364 |
} |
| 365 |
return odata; |
| 366 |
} |
| 367 |
|
| 368 |
|
| 369 |
/* |
| 370 |
* dev_wdc_altstatus_access(): |
| 371 |
*/ |
| 372 |
DEVICE_ACCESS(wdc_altstatus) |
| 373 |
{ |
| 374 |
struct wdc_data *d = extra; |
| 375 |
uint64_t idata = 0, odata = 0; |
| 376 |
|
| 377 |
idata = data[0]; |
| 378 |
|
| 379 |
/* Same as the normal status byte: */ |
| 380 |
odata = status_byte(d, cpu); |
| 381 |
|
| 382 |
if (writeflag==MEM_READ) |
| 383 |
debug("[ wdc: read from ALTSTATUS: 0x%02x ]\n", |
| 384 |
(int)odata); |
| 385 |
else { |
| 386 |
debug("[ wdc: write to ALT. CTRL: 0x%02x ]\n", |
| 387 |
(int)idata); |
| 388 |
if (idata & WDCTL_4BIT) |
| 389 |
d->cur_command = COMMAND_RESET; |
| 390 |
} |
| 391 |
|
| 392 |
if (writeflag == MEM_READ) |
| 393 |
data[0] = odata; |
| 394 |
|
| 395 |
return 1; |
| 396 |
} |
| 397 |
|
| 398 |
|
| 399 |
/* |
| 400 |
* wdc_command(): |
| 401 |
*/ |
| 402 |
void wdc_command(struct cpu *cpu, struct wdc_data *d, int idata) |
| 403 |
{ |
| 404 |
size_t i; |
| 405 |
|
| 406 |
d->cur_command = idata; |
| 407 |
d->atapi_cmd_in_progress = 0; |
| 408 |
d->error = 0; |
| 409 |
|
| 410 |
/* |
| 411 |
* Disk images that do not exist return an ABORT error. This also |
| 412 |
* happens with CDROM images with the WDCC_IDENTIFY command; CDROM |
| 413 |
* images must be detected with ATAPI_IDENTIFY_DEVICE instead. |
| 414 |
* |
| 415 |
* TODO: Is this correct/good behaviour? |
| 416 |
*/ |
| 417 |
if (!diskimage_exist(cpu->machine, d->drive + d->base_drive, |
| 418 |
DISKIMAGE_IDE)) { |
| 419 |
debug("[ wdc: command 0x%02x drive %i, but no disk image ]\n", |
| 420 |
d->cur_command, d->drive + d->base_drive); |
| 421 |
d->error |= WDCE_ABRT; |
| 422 |
d->delayed_interrupt = INT_DELAY; |
| 423 |
return; |
| 424 |
} |
| 425 |
if (diskimage_is_a_cdrom(cpu->machine, d->drive + d->base_drive, |
| 426 |
DISKIMAGE_IDE) && d->cur_command == WDCC_IDENTIFY) { |
| 427 |
debug("[ wdc: IDENTIFY drive %i, but it is an ATAPI " |
| 428 |
"drive ]\n", d->drive + d->base_drive); |
| 429 |
d->error |= WDCE_ABRT; |
| 430 |
d->delayed_interrupt = INT_DELAY; |
| 431 |
return; |
| 432 |
} |
| 433 |
|
| 434 |
/* Handle the command: */ |
| 435 |
switch (d->cur_command) { |
| 436 |
|
| 437 |
case WDCC_READ: |
| 438 |
case WDCC_READMULTI: |
| 439 |
if (!quiet_mode) |
| 440 |
debug("[ wdc: READ from drive %i, head %i, cyl %i, " |
| 441 |
"sector %i, nsecs %i ]\n", d->drive, d->head, |
| 442 |
d->cyl_hi*256+d->cyl_lo, d->sector, d->seccnt); |
| 443 |
wdc__read(cpu, d); |
| 444 |
break; |
| 445 |
|
| 446 |
case WDCC_WRITE: |
| 447 |
case WDCC_WRITEMULTI: |
| 448 |
if (!quiet_mode) |
| 449 |
debug("[ wdc: WRITE to drive %i, head %i, cyl %i, " |
| 450 |
"sector %i, nsecs %i ]\n", d->drive, d->head, |
| 451 |
d->cyl_hi*256+d->cyl_lo, d->sector, d->seccnt); |
| 452 |
wdc__write(cpu, d); |
| 453 |
break; |
| 454 |
|
| 455 |
case WDCC_IDP: /* Initialize drive parameters */ |
| 456 |
debug("[ wdc: IDP drive %i (TODO) ]\n", d->drive); |
| 457 |
/* TODO */ |
| 458 |
d->delayed_interrupt = INT_DELAY; |
| 459 |
break; |
| 460 |
|
| 461 |
case SET_FEATURES: |
| 462 |
debug("[ wdc: SET_FEATURES drive %i (TODO), feature 0x%02x ]\n", |
| 463 |
d->drive, d->precomp); |
| 464 |
/* TODO */ |
| 465 |
switch (d->precomp) { |
| 466 |
case WDSF_SET_MODE: |
| 467 |
debug("[ wdc: WDSF_SET_MODE drive %i, pio/dma flags " |
| 468 |
"0x%02x ]\n", d->drive, d->seccnt); |
| 469 |
break; |
| 470 |
default:d->error |= WDCE_ABRT; |
| 471 |
} |
| 472 |
/* TODO: always interrupt? */ |
| 473 |
d->delayed_interrupt = INT_DELAY; |
| 474 |
break; |
| 475 |
|
| 476 |
case WDCC_RECAL: |
| 477 |
debug("[ wdc: RECAL drive %i ]\n", d->drive); |
| 478 |
d->delayed_interrupt = INT_DELAY; |
| 479 |
break; |
| 480 |
|
| 481 |
case WDCC_IDENTIFY: |
| 482 |
case ATAPI_IDENTIFY_DEVICE: |
| 483 |
debug("[ wdc: %sIDENTIFY drive %i ]\n", d->cur_command == |
| 484 |
ATAPI_IDENTIFY_DEVICE? "ATAPI " : "", d->drive); |
| 485 |
wdc_initialize_identify_struct(cpu, d); |
| 486 |
/* The IDENTIFY data is sent out in low/high byte order: */ |
| 487 |
for (i=0; i<sizeof(d->identify_struct); i+=2) { |
| 488 |
wdc_addtoinbuf(d, d->identify_struct[i+1]); |
| 489 |
wdc_addtoinbuf(d, d->identify_struct[i+0]); |
| 490 |
} |
| 491 |
d->delayed_interrupt = INT_DELAY; |
| 492 |
break; |
| 493 |
|
| 494 |
case WDCC_IDLE_IMMED: |
| 495 |
debug("[ wdc: IDLE_IMMED drive %i ]\n", d->drive); |
| 496 |
/* TODO: interrupt here? */ |
| 497 |
d->delayed_interrupt = INT_DELAY; |
| 498 |
break; |
| 499 |
|
| 500 |
case WDCC_SETMULTI: |
| 501 |
debug("[ wdc: SETMULTI drive %i ]\n", d->drive); |
| 502 |
/* TODO: interrupt here? */ |
| 503 |
d->delayed_interrupt = INT_DELAY; |
| 504 |
break; |
| 505 |
|
| 506 |
case ATAPI_SOFT_RESET: |
| 507 |
debug("[ wdc: ATAPI_SOFT_RESET drive %i ]\n", d->drive); |
| 508 |
/* TODO: interrupt here? */ |
| 509 |
d->delayed_interrupt = INT_DELAY; |
| 510 |
break; |
| 511 |
|
| 512 |
case ATAPI_PKT_CMD: |
| 513 |
debug("[ wdc: ATAPI_PKT_CMD drive %i ]\n", d->drive); |
| 514 |
/* TODO: interrupt here? */ |
| 515 |
/* d->delayed_interrupt = INT_DELAY; */ |
| 516 |
d->atapi_cmd_in_progress = 1; |
| 517 |
d->atapi_phase = PHASE_CMDOUT; |
| 518 |
break; |
| 519 |
|
| 520 |
case WDCC_DIAGNOSE: |
| 521 |
debug("[ wdc: WDCC_DIAGNOSE drive %i: TODO ]\n", d->drive); |
| 522 |
/* TODO: interrupt here? */ |
| 523 |
d->delayed_interrupt = INT_DELAY; |
| 524 |
d->error = 1; /* No error? */ |
| 525 |
break; |
| 526 |
|
| 527 |
/* Unsupported commands, without warning: */ |
| 528 |
case WDCC_SEC_SET_PASSWORD: |
| 529 |
case WDCC_SEC_UNLOCK: |
| 530 |
case WDCC_SEC_ERASE_PREPARE: |
| 531 |
case WDCC_SEC_ERASE_UNIT: |
| 532 |
case WDCC_SEC_FREEZE_LOCK: |
| 533 |
case WDCC_SEC_DISABLE_PASSWORD: |
| 534 |
d->error |= WDCE_ABRT; |
| 535 |
break; |
| 536 |
|
| 537 |
default:/* TODO */ |
| 538 |
d->error |= WDCE_ABRT; |
| 539 |
fatal("[ wdc: WARNING! Unimplemented command 0x%02x (drive %i," |
| 540 |
" head %i, cyl %i, sector %i, nsecs %i) ]\n", |
| 541 |
d->cur_command, d->drive, d->head, d->cyl_hi*256+d->cyl_lo, |
| 542 |
d->sector, d->seccnt); |
| 543 |
} |
| 544 |
} |
| 545 |
|
| 546 |
|
| 547 |
/* |
| 548 |
* dev_wdc_access(): |
| 549 |
*/ |
| 550 |
DEVICE_ACCESS(wdc) |
| 551 |
{ |
| 552 |
struct wdc_data *d = extra; |
| 553 |
uint64_t idata = 0, odata = 0; |
| 554 |
int i; |
| 555 |
|
| 556 |
relative_addr /= d->addr_mult; |
| 557 |
|
| 558 |
if (writeflag == MEM_WRITE) { |
| 559 |
if (relative_addr == wd_data) |
| 560 |
idata = memory_readmax64(cpu, data, len); |
| 561 |
else { |
| 562 |
if (len != 1) |
| 563 |
fatal("[ wdc: WARNING! non-8-bit access! ]\n"); |
| 564 |
idata = data[0]; |
| 565 |
} |
| 566 |
} |
| 567 |
|
| 568 |
switch (relative_addr) { |
| 569 |
|
| 570 |
case wd_data: /* 0: data */ |
| 571 |
if (writeflag == MEM_READ) { |
| 572 |
odata = wdc_get_inbuf(d); |
| 573 |
|
| 574 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
| 575 |
if (len >= 2) |
| 576 |
odata += (wdc_get_inbuf(d) << 8); |
| 577 |
if (len == 4) { |
| 578 |
odata += (wdc_get_inbuf(d) << 16); |
| 579 |
odata += (wdc_get_inbuf(d) << 24); |
| 580 |
} |
| 581 |
} else { |
| 582 |
if (len >= 2) |
| 583 |
odata = (odata << 8) + wdc_get_inbuf(d); |
| 584 |
if (len == 4) { |
| 585 |
odata = (odata << 8) + wdc_get_inbuf(d); |
| 586 |
odata = (odata << 8) + wdc_get_inbuf(d); |
| 587 |
} |
| 588 |
} |
| 589 |
|
| 590 |
if (d->data_debug) { |
| 591 |
char *s = "0x%04llx ]\n"; |
| 592 |
if (len == 1) |
| 593 |
s = "0x%02llx ]\n"; |
| 594 |
if (len == 4) |
| 595 |
s = "0x%08llx ]\n"; |
| 596 |
if (len == 8) |
| 597 |
s = "0x%016llx ]\n"; |
| 598 |
debug("[ wdc: read from DATA: "); |
| 599 |
debug(s, (long long)odata); |
| 600 |
} |
| 601 |
|
| 602 |
if (d->atapi_cmd_in_progress) { |
| 603 |
d->atapi_len -= len; |
| 604 |
d->atapi_received += len; |
| 605 |
if (d->atapi_len == 0) { |
| 606 |
if (d->atapi_received < d->atapi_st-> |
| 607 |
data_in_len) { |
| 608 |
d->atapi_phase = PHASE_DATAIN; |
| 609 |
d->atapi_len = d->atapi_st-> |
| 610 |
data_in_len - |
| 611 |
d->atapi_received; |
| 612 |
if (d->atapi_len > 32768) |
| 613 |
d->atapi_len = 0; |
| 614 |
} else |
| 615 |
d->atapi_phase = |
| 616 |
PHASE_COMPLETED; |
| 617 |
d->delayed_interrupt = INT_DELAY; |
| 618 |
} |
| 619 |
} else { |
| 620 |
#if 0 |
| 621 |
if (d->inbuf_tail != d->inbuf_head) |
| 622 |
#else |
| 623 |
if (d->inbuf_tail != d->inbuf_head && |
| 624 |
((d->inbuf_tail - d->inbuf_head) % 512) |
| 625 |
== 0) |
| 626 |
#endif |
| 627 |
d->delayed_interrupt = INT_DELAY; |
| 628 |
} |
| 629 |
} else { |
| 630 |
int inbuf_len; |
| 631 |
if (d->data_debug) { |
| 632 |
char *s = "0x%04llx ]\n"; |
| 633 |
if (len == 1) |
| 634 |
s = "0x%02llx ]\n"; |
| 635 |
if (len == 4) |
| 636 |
s = "0x%08llx ]\n"; |
| 637 |
if (len == 8) |
| 638 |
s = "0x%016llx ]\n"; |
| 639 |
debug("[ wdc: write to DATA: "); |
| 640 |
debug(s, (long long)idata); |
| 641 |
} |
| 642 |
if (!d->write_in_progress && |
| 643 |
!d->atapi_cmd_in_progress) { |
| 644 |
fatal("[ wdc: write to DATA, but not " |
| 645 |
"expecting any? (len=%i): 0x%08lx ]\n", |
| 646 |
(int)len, (long)idata); |
| 647 |
} |
| 648 |
|
| 649 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
| 650 |
switch (len) { |
| 651 |
case 4: wdc_addtoinbuf(d, idata & 0xff); |
| 652 |
wdc_addtoinbuf(d, (idata >> 8) & 0xff); |
| 653 |
wdc_addtoinbuf(d, (idata >> 16) & 0xff); |
| 654 |
wdc_addtoinbuf(d, (idata >> 24) & 0xff); |
| 655 |
break; |
| 656 |
case 2: wdc_addtoinbuf(d, idata & 0xff); |
| 657 |
wdc_addtoinbuf(d, (idata >> 8) & 0xff); |
| 658 |
break; |
| 659 |
case 1: wdc_addtoinbuf(d, idata); break; |
| 660 |
default:fatal("wdc: unimplemented write " |
| 661 |
"len %i\n", len); |
| 662 |
exit(1); |
| 663 |
} |
| 664 |
} else { |
| 665 |
switch (len) { |
| 666 |
case 4: wdc_addtoinbuf(d, (idata >> 24) & 0xff); |
| 667 |
wdc_addtoinbuf(d, (idata >> 16) & 0xff); |
| 668 |
wdc_addtoinbuf(d, (idata >> 8) & 0xff); |
| 669 |
wdc_addtoinbuf(d, idata & 0xff); |
| 670 |
break; |
| 671 |
case 2: wdc_addtoinbuf(d, (idata >> 8) & 0xff); |
| 672 |
wdc_addtoinbuf(d, idata & 0xff); |
| 673 |
break; |
| 674 |
case 1: wdc_addtoinbuf(d, idata); break; |
| 675 |
default:fatal("wdc: unimplemented write " |
| 676 |
"len %i\n", len); |
| 677 |
exit(1); |
| 678 |
} |
| 679 |
} |
| 680 |
|
| 681 |
inbuf_len = d->inbuf_head - d->inbuf_tail; |
| 682 |
while (inbuf_len < 0) |
| 683 |
inbuf_len += WDC_INBUF_SIZE; |
| 684 |
|
| 685 |
if (d->atapi_cmd_in_progress && inbuf_len == 12) { |
| 686 |
unsigned char *scsi_cmd = malloc(12); |
| 687 |
int x = 0, res; |
| 688 |
|
| 689 |
if (d->atapi_st != NULL) |
| 690 |
scsi_transfer_free(d->atapi_st); |
| 691 |
d->atapi_st = scsi_transfer_alloc(); |
| 692 |
|
| 693 |
debug("[ wdc: ATAPI command ]\n"); |
| 694 |
|
| 695 |
while (inbuf_len > 0) { |
| 696 |
scsi_cmd[x++] = wdc_get_inbuf(d); |
| 697 |
inbuf_len --; |
| 698 |
} |
| 699 |
|
| 700 |
d->atapi_st->cmd = scsi_cmd; |
| 701 |
d->atapi_st->cmd_len = 12; |
| 702 |
|
| 703 |
if (scsi_cmd[0] == SCSIBLOCKCMD_READ_CAPACITY |
| 704 |
|| scsi_cmd[0] == SCSICMD_READ_10 |
| 705 |
|| scsi_cmd[0] == SCSICMD_MODE_SENSE10) |
| 706 |
d->atapi_st->cmd_len = 10; |
| 707 |
|
| 708 |
res = diskimage_scsicommand(cpu, |
| 709 |
d->drive + d->base_drive, DISKIMAGE_IDE, |
| 710 |
d->atapi_st); |
| 711 |
|
| 712 |
if (res == 0) { |
| 713 |
fatal("WDC: ATAPI scsi error?\n"); |
| 714 |
exit(1); |
| 715 |
} |
| 716 |
|
| 717 |
d->atapi_len = 0; |
| 718 |
d->atapi_received = 0; |
| 719 |
|
| 720 |
if (res == 1) { |
| 721 |
if (d->atapi_st->data_in != NULL) { |
| 722 |
int i; |
| 723 |
d->atapi_phase = PHASE_DATAIN; |
| 724 |
d->atapi_len = d->atapi_st-> |
| 725 |
data_in_len; |
| 726 |
for (i=0; i<d->atapi_len; i++) |
| 727 |
wdc_addtoinbuf(d, |
| 728 |
d->atapi_st-> |
| 729 |
data_in[i]); |
| 730 |
if (d->atapi_len > 32768) |
| 731 |
d->atapi_len = 32768; |
| 732 |
} else { |
| 733 |
d->atapi_phase = |
| 734 |
PHASE_COMPLETED; |
| 735 |
} |
| 736 |
} else { |
| 737 |
fatal("wdc atapi Dataout? TODO\n"); |
| 738 |
d->atapi_phase = PHASE_DATAOUT; |
| 739 |
exit(1); |
| 740 |
} |
| 741 |
|
| 742 |
d->delayed_interrupt = INT_DELAY; |
| 743 |
} |
| 744 |
|
| 745 |
if (( d->write_in_progress == WDCC_WRITEMULTI && |
| 746 |
inbuf_len % (512 * d->write_count) == 0) |
| 747 |
|| |
| 748 |
( d->write_in_progress == WDCC_WRITE && |
| 749 |
inbuf_len % 512 == 0) ) { |
| 750 |
int count = (d->write_in_progress == |
| 751 |
WDCC_WRITEMULTI)? d->write_count : 1; |
| 752 |
unsigned char buf[512 * count]; |
| 753 |
unsigned char *b = buf; |
| 754 |
|
| 755 |
if (d->inbuf_tail+512*count <= WDC_INBUF_SIZE) { |
| 756 |
b = d->inbuf + d->inbuf_tail; |
| 757 |
d->inbuf_tail = (d->inbuf_tail + 512 |
| 758 |
* count) % WDC_INBUF_SIZE; |
| 759 |
} else { |
| 760 |
for (i=0; i<512 * count; i++) |
| 761 |
buf[i] = wdc_get_inbuf(d); |
| 762 |
} |
| 763 |
|
| 764 |
diskimage_access(cpu->machine, |
| 765 |
d->drive + d->base_drive, DISKIMAGE_IDE, 1, |
| 766 |
d->write_offset, b, 512 * count); |
| 767 |
|
| 768 |
d->write_count -= count; |
| 769 |
d->write_offset += 512 * count; |
| 770 |
|
| 771 |
d->delayed_interrupt = INT_DELAY; |
| 772 |
|
| 773 |
if (d->write_count == 0) |
| 774 |
d->write_in_progress = 0; |
| 775 |
} |
| 776 |
} |
| 777 |
break; |
| 778 |
|
| 779 |
case wd_error: /* 1: error (r), precomp (w) */ |
| 780 |
if (writeflag == MEM_READ) { |
| 781 |
odata = d->error; |
| 782 |
debug("[ wdc: read from ERROR: 0x%02x ]\n", (int)odata); |
| 783 |
/* TODO: is the error value cleared on read? */ |
| 784 |
d->error = 0; |
| 785 |
} else { |
| 786 |
d->precomp = idata; |
| 787 |
debug("[ wdc: write to PRECOMP: 0x%02x ]\n",(int)idata); |
| 788 |
} |
| 789 |
break; |
| 790 |
|
| 791 |
case wd_seccnt: /* 2: sector count (or "ireason" for ATAPI) */ |
| 792 |
if (writeflag == MEM_READ) { |
| 793 |
odata = d->seccnt; |
| 794 |
if (d->atapi_cmd_in_progress) { |
| 795 |
odata = d->atapi_phase & (WDCI_CMD | WDCI_IN); |
| 796 |
} |
| 797 |
debug("[ wdc: read from SECCNT: 0x%02x ]\n",(int)odata); |
| 798 |
} else { |
| 799 |
d->seccnt = idata; |
| 800 |
debug("[ wdc: write to SECCNT: 0x%02x ]\n", (int)idata); |
| 801 |
} |
| 802 |
break; |
| 803 |
|
| 804 |
case wd_sector: /* 3: first sector */ |
| 805 |
if (writeflag == MEM_READ) { |
| 806 |
odata = d->sector; |
| 807 |
debug("[ wdc: read from SECTOR: 0x%02x ]\n",(int)odata); |
| 808 |
} else { |
| 809 |
d->sector = idata; |
| 810 |
debug("[ wdc: write to SECTOR: 0x%02x ]\n", (int)idata); |
| 811 |
} |
| 812 |
break; |
| 813 |
|
| 814 |
case wd_cyl_lo: /* 4: cylinder low */ |
| 815 |
if (writeflag == MEM_READ) { |
| 816 |
odata = d->cyl_lo; |
| 817 |
if (d->cur_command == COMMAND_RESET && |
| 818 |
diskimage_is_a_cdrom(cpu->machine, |
| 819 |
d->drive + d->base_drive, DISKIMAGE_IDE)) |
| 820 |
odata = 0x14; |
| 821 |
if (d->atapi_cmd_in_progress) { |
| 822 |
int x = d->atapi_len; |
| 823 |
if (x > 32768) |
| 824 |
x = 32768; |
| 825 |
odata = x & 255; |
| 826 |
} |
| 827 |
debug("[ wdc: read from CYL_LO: 0x%02x ]\n",(int)odata); |
| 828 |
} else { |
| 829 |
d->cyl_lo = idata; |
| 830 |
debug("[ wdc: write to CYL_LO: 0x%02x ]\n", (int)idata); |
| 831 |
} |
| 832 |
break; |
| 833 |
|
| 834 |
case wd_cyl_hi: /* 5: cylinder high */ |
| 835 |
if (writeflag == MEM_READ) { |
| 836 |
odata = d->cyl_hi; |
| 837 |
if (d->cur_command == COMMAND_RESET && |
| 838 |
diskimage_is_a_cdrom(cpu->machine, |
| 839 |
d->drive + d->base_drive, DISKIMAGE_IDE)) |
| 840 |
odata = 0xeb; |
| 841 |
if (d->atapi_cmd_in_progress) { |
| 842 |
int x = d->atapi_len; |
| 843 |
if (x > 32768) |
| 844 |
x = 32768; |
| 845 |
odata = (x >> 8) & 255; |
| 846 |
} |
| 847 |
debug("[ wdc: read from CYL_HI: 0x%02x ]\n",(int)odata); |
| 848 |
} else { |
| 849 |
d->cyl_hi = idata; |
| 850 |
debug("[ wdc: write to CYL_HI: 0x%02x ]\n", (int)idata); |
| 851 |
} |
| 852 |
break; |
| 853 |
|
| 854 |
case wd_sdh: /* 6: sectorsize/drive/head */ |
| 855 |
if (writeflag==MEM_READ) { |
| 856 |
odata = (d->sectorsize << 6) + (d->lba << 5) + |
| 857 |
(d->drive << 4) + (d->head); |
| 858 |
debug("[ wdc: read from SDH: 0x%02x (sectorsize %i," |
| 859 |
" lba=%i, drive %i, head %i) ]\n", (int)odata, |
| 860 |
d->sectorsize, d->lba, d->drive, d->head); |
| 861 |
} else { |
| 862 |
d->sectorsize = (idata >> 6) & 3; |
| 863 |
d->lba = (idata >> 5) & 1; |
| 864 |
d->drive = (idata >> 4) & 1; |
| 865 |
d->head = idata & 0xf; |
| 866 |
debug("[ wdc: write to SDH: 0x%02x (sectorsize %i," |
| 867 |
" lba=%i, drive %i, head %i) ]\n", (int)idata, |
| 868 |
d->sectorsize, d->lba, d->drive, d->head); |
| 869 |
} |
| 870 |
break; |
| 871 |
|
| 872 |
case wd_command: /* 7: command or status */ |
| 873 |
if (writeflag==MEM_READ) { |
| 874 |
odata = status_byte(d, cpu); |
| 875 |
if (!quiet_mode) |
| 876 |
debug("[ wdc: read from STATUS: 0x%02x ]\n", |
| 877 |
(int)odata); |
| 878 |
cpu_interrupt_ack(cpu, d->irq_nr); |
| 879 |
d->int_asserted = 0; |
| 880 |
d->delayed_interrupt = 0; |
| 881 |
} else { |
| 882 |
debug("[ wdc: write to COMMAND: 0x%02x ]\n",(int)idata); |
| 883 |
wdc_command(cpu, d, idata); |
| 884 |
} |
| 885 |
break; |
| 886 |
|
| 887 |
default: |
| 888 |
if (writeflag==MEM_READ) |
| 889 |
debug("[ wdc: read from 0x%02x ]\n", |
| 890 |
(int)relative_addr); |
| 891 |
else |
| 892 |
debug("[ wdc: write to 0x%02x: 0x%02x ]\n", |
| 893 |
(int)relative_addr, (int)idata); |
| 894 |
} |
| 895 |
|
| 896 |
if (cpu->machine->machine_type != MACHINE_HPCMIPS && |
| 897 |
cpu->machine->machine_type != MACHINE_EVBMIPS && |
| 898 |
cpu->machine->machine_type != MACHINE_BEBOX) |
| 899 |
dev_wdc_tick(cpu, extra); |
| 900 |
|
| 901 |
if (writeflag == MEM_READ) { |
| 902 |
if (relative_addr == wd_data) |
| 903 |
memory_writemax64(cpu, data, len, odata); |
| 904 |
else |
| 905 |
data[0] = odata; |
| 906 |
} |
| 907 |
|
| 908 |
return 1; |
| 909 |
} |
| 910 |
|
| 911 |
|
| 912 |
DEVINIT(wdc) |
| 913 |
{ |
| 914 |
struct wdc_data *d; |
| 915 |
uint64_t alt_status_addr; |
| 916 |
int i, tick_shift = WDC_TICK_SHIFT; |
| 917 |
|
| 918 |
d = malloc(sizeof(struct wdc_data)); |
| 919 |
if (d == NULL) { |
| 920 |
fprintf(stderr, "out of memory\n"); |
| 921 |
exit(1); |
| 922 |
} |
| 923 |
memset(d, 0, sizeof(struct wdc_data)); |
| 924 |
d->irq_nr = devinit->irq_nr; |
| 925 |
d->addr_mult = devinit->addr_mult; |
| 926 |
d->data_debug = 1; |
| 927 |
|
| 928 |
d->inbuf = zeroed_alloc(WDC_INBUF_SIZE); |
| 929 |
|
| 930 |
/* base_drive = 0 for the primary controller, 2 for the secondary. */ |
| 931 |
d->base_drive = 0; |
| 932 |
if ((devinit->addr & 0xfff) == 0x170) |
| 933 |
d->base_drive = 2; |
| 934 |
|
| 935 |
alt_status_addr = devinit->addr + 0x206; |
| 936 |
|
| 937 |
/* Special hacks for individual machines: */ |
| 938 |
switch (devinit->machine->machine_type) { |
| 939 |
case MACHINE_MACPPC: |
| 940 |
alt_status_addr = devinit->addr + 0x160; |
| 941 |
break; |
| 942 |
case MACHINE_HPCMIPS: |
| 943 |
/* TODO: Fix */ |
| 944 |
if (devinit->addr == 0x14000180) |
| 945 |
alt_status_addr = 0x14000386; |
| 946 |
break; |
| 947 |
case MACHINE_IQ80321: |
| 948 |
alt_status_addr = devinit->addr + 0x402; |
| 949 |
break; |
| 950 |
} |
| 951 |
|
| 952 |
/* Get disk geometries: */ |
| 953 |
for (i=0; i<2; i++) |
| 954 |
if (diskimage_exist(devinit->machine, d->base_drive +i, |
| 955 |
DISKIMAGE_IDE)) |
| 956 |
diskimage_getchs(devinit->machine, d->base_drive + i, |
| 957 |
DISKIMAGE_IDE, &d->cyls[i], &d->heads[i], |
| 958 |
&d->sectors_per_track[i]); |
| 959 |
|
| 960 |
memory_device_register(devinit->machine->memory, "wdc_altstatus", |
| 961 |
alt_status_addr, 2, dev_wdc_altstatus_access, d, DM_DEFAULT, NULL); |
| 962 |
memory_device_register(devinit->machine->memory, devinit->name, |
| 963 |
devinit->addr, DEV_WDC_LENGTH * devinit->addr_mult, dev_wdc_access, |
| 964 |
d, DM_DEFAULT, NULL); |
| 965 |
|
| 966 |
if (devinit->machine->machine_type != MACHINE_HPCMIPS && |
| 967 |
devinit->machine->machine_type != MACHINE_EVBMIPS) |
| 968 |
tick_shift += 1; |
| 969 |
|
| 970 |
machine_add_tickfunction(devinit->machine, dev_wdc_tick, |
| 971 |
d, tick_shift); |
| 972 |
|
| 973 |
return 1; |
| 974 |
} |
| 975 |
|
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