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86Box/src/machine/m_at_440fx.c

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/*
* 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 Intel 440FX PCISet chip.
*
* Version: @(#)m_at_440fx.c 1.0.13 2018/04/26
*
* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
* Miran Grca, <mgrca8@gmail.com>
*
* Copyright 2008-2018 Sarah Walker.
* Copyright 2016-2018 Miran Grca.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "../86box.h"
#include "../io.h"
#include "../pci.h"
#include "../mem.h"
#include "../memregs.h"
#include "../device.h"
#include "../keyboard.h"
#include "../piix.h"
#include "../intel_flash.h"
#include "../sio.h"
#include "machine.h"
typedef struct
{
uint8_t regs[256];
} i440fx_t;
static void
i440fx_map(uint32_t addr, uint32_t size, int state)
{
switch (state & 3) {
case 0:
mem_set_mem_state(addr, size, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
break;
case 1:
mem_set_mem_state(addr, size, MEM_READ_INTERNAL | MEM_WRITE_EXTERNAL);
break;
case 2:
mem_set_mem_state(addr, size, MEM_READ_EXTERNAL | MEM_WRITE_INTERNAL);
break;
case 3:
mem_set_mem_state(addr, size, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
break;
}
flushmmucache_nopc();
}
static void
i440fx_write(int func, int addr, uint8_t val, void *priv)
{
i440fx_t *dev = (i440fx_t *) priv;
if (func)
return;
if ((addr >= 0x10) && (addr < 0x4f))
return;
switch (addr) {
case 0x00: case 0x01: case 0x02: case 0x03:
case 0x08: case 0x09: case 0x0a: case 0x0b:
case 0x0c: case 0x0e:
return;
case 0x04: /*Command register*/
val &= 0x02;
val |= 0x04;
break;
case 0x05:
val = 0;
break;
case 0x06: /*Status*/
val = 0;
break;
case 0x07:
val &= 0x80;
val |= 0x02;
break;
case 0x59: /*PAM0*/
if ((dev->regs[0x59] ^ val) & 0xf0) {
i440fx_map(0xf0000, 0x10000, val >> 4);
shadowbios = (val & 0x10);
}
break;
case 0x5a: /*PAM1*/
if ((dev->regs[0x5a] ^ val) & 0x0f)
i440fx_map(0xc0000, 0x04000, val & 0xf);
if ((dev->regs[0x5a] ^ val) & 0xf0)
i440fx_map(0xc4000, 0x04000, val >> 4);
break;
case 0x5b: /*PAM2*/
if ((dev->regs[0x5b] ^ val) & 0x0f)
i440fx_map(0xc8000, 0x04000, val & 0xf);
if ((dev->regs[0x5b] ^ val) & 0xf0)
i440fx_map(0xcc000, 0x04000, val >> 4);
break;
case 0x5c: /*PAM3*/
if ((dev->regs[0x5c] ^ val) & 0x0f)
i440fx_map(0xd0000, 0x04000, val & 0xf);
if ((dev->regs[0x5c] ^ val) & 0xf0)
i440fx_map(0xd4000, 0x04000, val >> 4);
break;
case 0x5d: /*PAM4*/
if ((dev->regs[0x5d] ^ val) & 0x0f)
i440fx_map(0xd8000, 0x04000, val & 0xf);
if ((dev->regs[0x5d] ^ val) & 0xf0)
i440fx_map(0xdc000, 0x04000, val >> 4);
break;
case 0x5e: /*PAM5*/
if ((dev->regs[0x5e] ^ val) & 0x0f)
i440fx_map(0xe0000, 0x04000, val & 0xf);
if ((dev->regs[0x5e] ^ val) & 0xf0)
i440fx_map(0xe4000, 0x04000, val >> 4);
break;
case 0x5f: /*PAM6*/
if ((dev->regs[0x5f] ^ val) & 0x0f)
i440fx_map(0xe8000, 0x04000, val & 0xf);
if ((dev->regs[0x5f] ^ val) & 0xf0)
i440fx_map(0xec000, 0x04000, val >> 4);
break;
case 0x72: /*SMRAM*/
if ((dev->regs[0x72] ^ val) & 0x48)
i440fx_map(0xa0000, 0x20000, ((val & 0x48) == 0x48) ? 3 : 0);
break;
}
dev->regs[addr] = val;
}
static uint8_t
i440fx_read(int func, int addr, void *priv)
{
i440fx_t *dev = (i440fx_t *) priv;
if (func)
return 0xff;
return dev->regs[addr];
}
static void
i440fx_reset(void *priv)
{
i440fx_write(0, 0x59, 0x00, priv);
i440fx_write(0, 0x72, 0x02, priv);
}
static void
i440fx_close(void *p)
{
i440fx_t *i440fx = (i440fx_t *)p;
free(i440fx);
}
static void
*i440fx_init(const device_t *info)
{
i440fx_t *i440fx = (i440fx_t *) malloc(sizeof(i440fx_t));
memset(i440fx, 0, sizeof(i440fx_t));
i440fx->regs[0x00] = 0x86; i440fx->regs[0x01] = 0x80; /*Intel*/
i440fx->regs[0x02] = 0x37; i440fx->regs[0x03] = 0x12; /*82441FX*/
i440fx->regs[0x04] = 0x03; i440fx->regs[0x05] = 0x01;
i440fx->regs[0x06] = 0x80; i440fx->regs[0x07] = 0x00;
i440fx->regs[0x08] = 0x02; /*A0 stepping*/
i440fx->regs[0x09] = 0x00; i440fx->regs[0x0a] = 0x00; i440fx->regs[0x0b] = 0x06;
i440fx->regs[0x0d] = 0x00;
i440fx->regs[0x0f] = 0x00;
i440fx->regs[0x2c] = 0xf4;
i440fx->regs[0x2d] = 0x1a;
i440fx->regs[0x2e] = 0x00;
i440fx->regs[0x2f] = 0x11;
i440fx->regs[0x50] = 0x00;
i440fx->regs[0x51] = 0x01;
i440fx->regs[0x52] = i440fx->regs[0x54] = i440fx->regs[0x55] = i440fx->regs[0x56] = 0x00;
i440fx->regs[0x53] = 0x80;
i440fx->regs[0x57] = 0x01;
i440fx->regs[0x58] = 0x10;
i440fx->regs[0x5a] = i440fx->regs[0x5b] = i440fx->regs[0x5c] = i440fx->regs[0x5d] = 0x11;
i440fx->regs[0x5e] = 0x11;
i440fx->regs[0x5f] = 0x31;
i440fx->regs[0x72] = 0x02;
pci_add_card(0, i440fx_read, i440fx_write, i440fx);
return i440fx;
}
const device_t i440fx_device =
{
"Intel 82441FX",
DEVICE_PCI,
0,
i440fx_init,
i440fx_close,
i440fx_reset,
NULL,
NULL,
NULL,
NULL
};
void
machine_at_i440fx_init(const machine_t *model)
{
machine_at_common_init(model);
device_add(&keyboard_ps2_pci_device);
memregs_init();
pci_init(PCI_CONFIG_TYPE_1);
pci_register_slot(0x00, PCI_CARD_SPECIAL, 0, 0, 0, 0);
pci_register_slot(0x0E, PCI_CARD_NORMAL, 1, 2, 3, 4);
pci_register_slot(0x0D, PCI_CARD_NORMAL, 2, 3, 4, 1);
pci_register_slot(0x0C, PCI_CARD_NORMAL, 3, 4, 1, 2);
pci_register_slot(0x0B, PCI_CARD_NORMAL, 4, 1, 2, 3);
pci_register_slot(0x0A, PCI_CARD_NORMAL, 1, 2, 3, 4);
pci_register_slot(0x07, PCI_CARD_SPECIAL, 0, 0, 0, 0);
device_add(&i440fx_device);
device_add(&piix3_device);
fdc37c665_init();
device_add(&intel_flash_bxt_device);
}
void
machine_at_s1668_init(const machine_t *model)
{
machine_at_common_init(model);
device_add(&keyboard_ps2_ami_pci_device);
memregs_init();
pci_init(PCI_CONFIG_TYPE_1);
pci_register_slot(0x00, PCI_CARD_SPECIAL, 0, 0, 0, 0);
pci_register_slot(0x07, PCI_CARD_SPECIAL, 0, 0, 0, 0);
pci_register_slot(0x0E, PCI_CARD_NORMAL, 1, 2, 3, 4);
pci_register_slot(0x0D, PCI_CARD_NORMAL, 2, 3, 4, 1);
pci_register_slot(0x0C, PCI_CARD_NORMAL, 3, 4, 1, 2);
pci_register_slot(0x0B, PCI_CARD_NORMAL, 4, 1, 2, 3);
pci_register_slot(0x0A, PCI_CARD_NORMAL, 1, 2, 3, 4);
device_add(&i440fx_device);
device_add(&piix3_device);
fdc37c665_init();
device_add(&intel_flash_bxt_device);
}
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