mirror of
https://github.com/86Box/86Box.git
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118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Intel ICH2 Trap Handler
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*
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*
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*
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* Authors: Tiseno100,
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* Jasmine Iwanek, <jriwanek@gmail.com>
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*
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* Copyright 2022 Tiseno100.
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* Copyright 2022-2023 Jasmine Iwanek.
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*/
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#include <stdarg.h>
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#include <stdint.h>
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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 <wchar.h>
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#define HAVE_STDARG_H
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#include <86box/86box.h>
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#include "cpu.h"
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#include <86box/timer.h>
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#include <86box/io.h>
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#include <86box/device.h>
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#include <86box/plat.h> // Replace with plat_unused.h when upstreamed
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#include <86box/apm.h>
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#include <86box/nvr.h>
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#include <86box/acpi.h>
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#include <86box/intel_ich2_trap.h>
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#ifdef ENABLE_INTEL_ICH2_TRAP_LOG
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int intel_ich2_trap_do_log = ENABLE_INTEL_ICH2_TRAP_LOG;
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static void
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intel_ich2_trap_log(const char *fmt, ...)
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{
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va_list ap;
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if (intel_ich2_trap_do_log) {
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va_start(ap, fmt);
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pclog_ex(fmt, ap);
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va_end(ap);
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}
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}
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#else
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# define intel_ich2_trap_log(fmt, ...)
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#endif
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void
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intel_ich2_trap_set_acpi(intel_ich2_trap_t *dev, acpi_t *acpi)
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{
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dev->acpi = acpi;
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}
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static void
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intel_ich2_trap_kick(UNUSED(int size), UNUSED(uint16_t addr), UNUSED(uint8_t write), UNUSED(uint8_t val), void *priv)
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{
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intel_ich2_trap_t *dev = (intel_ich2_trap_t *) priv;
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intel_ich2_trap_log("Intel ICH2 Trap: Entered an I/O Trap. Provoking an SMI.\n");
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acpi_raise_smi(dev->acpi, 1);
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}
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void
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intel_ich2_device_trap_setup(uint8_t acpi_reg, uint8_t acpi_reg_val, uint16_t addr, uint16_t size, intel_ich2_trap_t *dev)
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{
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uint8_t acpi_reg_recieve = dev->acpi->regs.devtrap_en >> ((acpi_reg & 1) * 8); /* Trap register is 16-bit on ranged ACPIBASE + 48h-49h */
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int enable = !!(acpi_reg_recieve & acpi_reg_val); /* If enabled. Settle in the I/O trap */
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if (enable)
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intel_ich2_trap_log("Intel ICH2 Trap: A new trap was setted up on address 0x%x with the size of %d\n", addr, size);
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io_trap_remap(dev->trap, enable, addr, size);
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}
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static void
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intel_ich2_trap_close(void *priv)
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{
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intel_ich2_trap_t *dev = (intel_ich2_trap_t *) priv;
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io_trap_remove(dev->trap); // Remove the I/O Trap
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free(dev);
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}
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static void *
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intel_ich2_trap_init(UNUSED(const device_t *info))
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{
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intel_ich2_trap_t *dev = (intel_ich2_trap_t *) malloc(sizeof(intel_ich2_trap_t));
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memset(dev, 0, sizeof(intel_ich2_trap_t));
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intel_ich2_trap_log("Intel ICH2 Trap: Starting a new Trap handler.");
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io_trap_add(intel_ich2_trap_kick, dev);
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return dev;
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}
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const device_t intel_ich2_trap_device = {
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.name = "Intel ICH2 Trap Hander",
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.internal_name = "intel_ich2_trap",
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.flags = 0,
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.local = 0,
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.init = intel_ich2_trap_init,
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.close = intel_ich2_trap_close,
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.reset = NULL,
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{ .available = NULL },
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.speed_changed = NULL,
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.force_redraw = NULL,
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.config = NULL
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};
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