Files
86Box/src/chipset/ali6117.c

519 lines
15 KiB
C

/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Implementation of the ALi M6117 SoC.
*
*
*
* Authors: RichardG, <richardg867@gmail.com>
*
* Copyright 2020 RichardG.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include <86box/mem.h>
#include <86box/io.h>
#include <86box/pci.h>
#include <86box/pic.h>
#include <86box/timer.h>
#include <86box/pit.h>
#include <86box/device.h>
#include <86box/port_92.h>
#include <86box/usb.h>
#include <86box/hdc.h>
#include <86box/hdc_ide.h>
#include <86box/chipset.h>
typedef struct ali6117_t {
uint32_t local;
/* Main registers (port 22h/23h) */
uint8_t unlocked, mode;
uint8_t reg_offset;
uint8_t regs[256];
} ali6117_t;
/* Total size, Bank 0 size, Bank 1 size, Bank 2 size, Bank 3 size. */
static uint32_t ali6117_modes[32][5] = {
// clang-format off
{ 1024, 512, 512, 0, 0 },
{ 2048, 512, 512, 512, 512 },
{ 3072, 512, 512, 2048, 0 },
{ 5120, 512, 512, 2048, 2048 },
{ 9216, 512, 512, 8192, 0 },
{ 1024, 1024, 0, 0, 0 },
{ 2048, 1024, 1024, 0, 0 },
{ 4096, 1024, 1024, 2048, 0 },
{ 6144, 1024, 1024, 2048, 2048 },
{ 10240, 1024, 1024, 8192, 0 },
{ 18432, 1024, 1024, 8192, 8192 },
{ 3072, 1024, 2048, 0, 0 },
{ 5120, 1024, 2048, 2048, 0 },
{ 9216, 1024, 8192, 0, 0 },
{ 2048, 2048, 0, 0, 0 },
{ 4096, 2048, 2048, 0, 0 },
{ 6144, 2048, 2048, 2048, 0 },
{ 8192, 2048, 2048, 2048, 2048 },
{ 12288, 2048, 2048, 8192, 0 },
{ 20480, 2048, 2048, 8192, 8192 },
{ 10240, 2048, 8192, 0, 0 },
{ 18432, 2048, 8192, 8192, 0 },
{ 26624, 2048, 8192, 8192, 8192 },
{ 4096, 4096, 0, 0, 0 },
{ 8192, 4096, 4096, 0, 0 },
{ 24576, 4096, 4096, 8192, 8192 },
{ 12288, 4096, 8192, 0, 0 },
{ 8192, 8192, 0, 0, 0 },
{ 16384, 8192, 8192, 0, 0 },
{ 24576, 8192, 8192, 8192, 0 },
{ 32768, 8192, 8192, 8192, 8192 },
{ 65536, 32768, 32768, 0, 0 }
// clang-format on
};
#ifdef ENABLE_ALI6117_LOG
int ali6117_do_log = ENABLE_ALI6117_LOG;
static void
ali6117_log(const char *fmt, ...)
{
va_list ap;
if (ali6117_do_log) {
va_start(ap, fmt);
pclog_ex(fmt, ap);
va_end(ap);
}
}
#else
# define ali6117_log(fmt, ...)
#endif
static void
ali6117_recalcmapping(ali6117_t *dev)
{
uint8_t reg, bitpair;
uint32_t base, size;
int state;
shadowbios = 0;
shadowbios_write = 0;
ali6117_log("ALI6117: Shadowing for A0000-BFFFF (reg 12 bit 1) = %s\n", (dev->regs[0x12] & 0x02) ? "on" : "off");
mem_set_mem_state(0xa0000, 0x20000, (dev->regs[0x12] & 0x02) ? (MEM_WRITE_INTERNAL | MEM_READ_INTERNAL) : (MEM_WRITE_EXTANY | MEM_READ_EXTANY));
for (reg = 0; reg <= 1; reg++) {
for (bitpair = 0; bitpair <= 3; bitpair++) {
size = 0x8000;
base = 0xc0000 + (size * ((reg * 4) + bitpair));
ali6117_log("ALI6117: Shadowing for %05X-%05X (reg %02X bp %d wmask %02X rmask %02X) =", base, base + size - 1, 0x14 + reg, bitpair, 1 << ((bitpair * 2) + 1), 1 << (bitpair * 2));
state = 0;
if (dev->regs[0x14 + reg] & (1 << ((bitpair * 2) + 1))) {
ali6117_log(" w on");
state |= MEM_WRITE_INTERNAL;
if (base >= 0xe0000)
shadowbios_write |= 1;
} else {
ali6117_log(" w off");
state |= MEM_WRITE_EXTANY;
}
if (dev->regs[0x14 + reg] & (1 << (bitpair * 2))) {
ali6117_log("; r on\n");
state |= MEM_READ_INTERNAL;
if (base >= 0xe0000)
shadowbios |= 1;
} else {
ali6117_log("; r off\n");
state |= MEM_READ_EXTANY;
}
mem_set_mem_state(base, size, state);
}
}
flushmmucache_nopc();
}
static void
ali6117_bank_recalc(ali6117_t *dev)
{
int i;
uint32_t bank, addr;
for (i = 0x00000000; i < (mem_size << 10); i += 4096) {
if ((i >= 0x000a0000) && (i < 0x00100000))
continue;
if (!is6117 && (i >= 0x00f00000) && (i < 0x01000000))
continue;
if (is6117 && (i >= 0x03f00000) && (i < 0x04000000))
continue;
switch (dev->regs[0x10] & 0xf8) {
case 0xe8:
bank = (i >> 12) & 3;
addr = (i & 0xfff) | ((i >> 14) << 12);
ali6117_log("E8 (%08X): Bank %i, address %08X vs. bank size %08X\n", i, bank, addr, ali6117_modes[dev->mode][bank + 1] * 1024);
if (addr < (ali6117_modes[dev->mode][bank + 1] * 1024))
mem_set_mem_state_both(i, 4096, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
else
mem_set_mem_state_both(i, 4096, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
break;
case 0xf8:
bank = (i >> 12) & 1;
addr = (i & 0xfff) | ((i >> 13) << 12);
ali6117_log("F8 (%08X): Bank %i, address %08X vs. bank size %08X\n", i, bank, addr, ali6117_modes[dev->mode][bank + 1] * 1024);
if (addr < (ali6117_modes[dev->mode][bank + 1] * 1024))
mem_set_mem_state_both(i, 4096, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
else
mem_set_mem_state_both(i, 4096, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
break;
default:
mem_set_mem_state_both(i, 4096, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
break;
}
}
flushmmucache();
}
static void
ali6117_reg_write(uint16_t addr, uint8_t val, void *priv)
{
ali6117_t *dev = (ali6117_t *) priv;
ali6117_log("ALI6117: reg_write(%04X, %02X)\n", addr, val);
if (addr == 0x22)
dev->reg_offset = val;
else if (dev->reg_offset == 0x13)
dev->unlocked = (val == 0xc5);
else if (dev->unlocked) {
ali6117_log("ALI6117: regs[%02X] = %02X\n", dev->reg_offset, val);
if (!(dev->local & 0x08) || (dev->reg_offset < 0x30))
switch (dev->reg_offset) {
case 0x30:
case 0x34:
case 0x35:
case 0x3e:
case 0x3f:
case 0x46:
case 0x4c:
case 0x6a:
case 0x73:
return; /* read-only registers */
case 0x10:
refresh_at_enable = !(val & 0x02) || !!(dev->regs[0x20] & 0x80);
dev->regs[dev->reg_offset] = val;
if (dev->local != 0x8) {
if (val & 0x04)
mem_set_mem_state_both(0x00f00000, 0x00100000, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
else
mem_set_mem_state_both(0x00f00000, 0x00100000, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
ali6117_bank_recalc(dev);
}
break;
case 0x12:
val &= 0xf7;
/* FALL-THROUGH */
case 0x14:
case 0x15:
dev->regs[dev->reg_offset] = val;
ali6117_recalcmapping(dev);
break;
case 0x1e:
val &= 0x07;
switch (val) {
/* Half PIT clock. */
case 0x0:
cpu_set_isa_speed(7159091);
break;
/* Divisors on the input clock PCLK2, which is double the CPU clock. */
case 0x1:
cpu_set_isa_speed(cpu_busspeed / 1.5);
break;
case 0x2:
cpu_set_isa_speed(cpu_busspeed / 2);
break;
case 0x3:
cpu_set_isa_speed(cpu_busspeed / 2.5);
break;
case 0x4:
cpu_set_isa_speed(cpu_busspeed / 3);
break;
case 0x5:
cpu_set_isa_speed(cpu_busspeed / 4);
break;
case 0x6:
cpu_set_isa_speed(cpu_busspeed / 5);
break;
case 0x7:
cpu_set_isa_speed(cpu_busspeed / 6);
break;
}
break;
case 0x20:
val &= 0xbf;
refresh_at_enable = !(dev->regs[0x10] & 0x02) || !!(val & 0x80);
break;
case 0x31:
/* TODO: fast gate A20 (bit 0) */
val &= 0x21;
break;
case 0x32:
val &= 0xc1;
break;
case 0x33:
val &= 0xfd;
break;
case 0x36:
val &= 0xf0;
val |= dev->regs[dev->reg_offset];
pic_mouse_latch(val & 0x40);
break;
case 0x37:
val &= 0xf5;
break;
case 0x3c:
val &= 0x8f;
ide_pri_disable();
ide_set_base(1, (val & 0x01) ? 0x170 : 0x1f0);
ide_set_side(1, (val & 0x01) ? 0x376 : 0x3f6);
ide_pri_enable();
break;
case 0x44:
case 0x45:
val &= 0x3f;
break;
case 0x4a:
val &= 0xfe;
break;
case 0x55:
val &= 0x03;
break;
case 0x56:
val &= 0xc7;
break;
case 0x58:
val &= 0xc3;
break;
case 0x59:
val &= 0x60;
break;
case 0x5b:
val &= 0x1f;
break;
case 0x64:
val &= 0xf7;
break;
case 0x66:
val &= 0xe3;
break;
case 0x67:
val &= 0xdf;
break;
case 0x69:
val &= 0x50;
break;
case 0x6b:
val &= 0x7f;
break;
case 0x6e:
case 0x6f:
val &= 0x03;
break;
case 0x71:
val &= 0x1f;
break;
}
dev->regs[dev->reg_offset] = val;
}
}
static uint8_t
ali6117_reg_read(uint16_t addr, void *priv)
{
ali6117_t *dev = (ali6117_t *) priv;
uint8_t ret;
if (addr == 0x22)
ret = dev->reg_offset;
else
ret = dev->regs[dev->reg_offset];
ali6117_log("ALI6117: reg_read(%04X) = %02X\n", dev->reg_offset, ret);
return ret;
}
static void
ali6117_reset(void *priv)
{
ali6117_t *dev = (ali6117_t *) priv;
ali6117_log("ALI6117: reset()\n");
memset(dev->regs, 0, sizeof(dev->regs));
dev->regs[0x11] = 0xf8;
dev->regs[0x12] = 0x20;
dev->regs[0x17] = 0xff;
dev->regs[0x18] = 0xf0;
dev->regs[0x1a] = 0xff;
dev->regs[0x1b] = 0xf0;
dev->regs[0x1d] = 0xff;
dev->regs[0x20] = 0x80;
if (dev->local & 0x08) {
dev->regs[0x30] = 0x08;
dev->regs[0x31] = 0x01;
dev->regs[0x34] = 0x04; /* enable internal RTC */
dev->regs[0x35] = 0x20; /* enable internal KBC */
dev->regs[0x36] = dev->local & 0x07; /* M6117D ID */
}
cpu_set_isa_speed(7159091);
refresh_at_enable = 1;
if (dev->local != 0x8) {
/* On-board memory 15-16M is enabled by default. */
mem_set_mem_state_both(0x00f00000, 0x00100000, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
ali6117_bank_recalc(dev);
pic_mouse_latch(0x00);
}
}
static void
ali6117_setup(ali6117_t *dev)
{
ali6117_log("ALI6117: setup()\n");
/* Main register interface */
io_sethandler(0x22, 2,
ali6117_reg_read, NULL, NULL, ali6117_reg_write, NULL, NULL, dev);
}
static void
ali6117_close(void *priv)
{
ali6117_t *dev = (ali6117_t *) priv;
ali6117_log("ALI6117: close()\n");
io_removehandler(0x22, 2,
ali6117_reg_read, NULL, NULL, ali6117_reg_write, NULL, NULL, dev);
free(dev);
}
static void *
ali6117_init(const device_t *info)
{
int i, last_match = 0;
ali6117_log("ALI6117: init()\n");
ali6117_t *dev = (ali6117_t *) malloc(sizeof(ali6117_t));
memset(dev, 0, sizeof(ali6117_t));
dev->local = info->local;
device_add(&ide_isa_device);
ali6117_setup(dev);
for (i = 31; i >= 0; i--) {
if ((mem_size >= ali6117_modes[i][0]) && (ali6117_modes[i][0] > last_match)) {
last_match = ali6117_modes[i][0];
dev->mode = i;
}
}
if (!(dev->local & 0x08))
pic_kbd_latch(0x01);
ali6117_reset(dev);
if (!(dev->local & 0x08))
pic_elcr_io_handler(0);
return dev;
}
const device_t ali1217_device = {
.name = "ALi M1217",
.internal_name = "ali1217",
.flags = DEVICE_AT,
.local = 0x8,
.init = ali6117_init,
.close = ali6117_close,
.reset = ali6117_reset,
{ .available = NULL },
.speed_changed = NULL,
.force_redraw = NULL,
.config = NULL
};
const device_t ali6117d_device = {
.name = "ALi M6117D",
.internal_name = "ali6117d",
.flags = DEVICE_AT,
.local = 0x2,
.init = ali6117_init,
.close = ali6117_close,
.reset = ali6117_reset,
{ .available = NULL },
.speed_changed = NULL,
.force_redraw = NULL,
.config = NULL
};