150 lines
2.5 KiB
C
150 lines
2.5 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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* Advanced Power Management emulation.
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*
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* Version: @(#)apm.c 1.0.0 2019/05/12
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*
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* Authors: Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2019 Miran Grca.
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*/
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#include <stdio.h>
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#include <stdint.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.h"
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#include "cpu.h"
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#include "device.h"
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#include "86box_io.h"
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typedef struct
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{
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uint8_t cmd,
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stat;
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} apm_t;
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#ifdef ENABLE_APM_LOG
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int apm_do_log = ENABLE_APM_LOG;
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static void
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apm_log(const char *fmt, ...)
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{
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va_list ap;
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if (apm_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 apm_log(fmt, ...)
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#endif
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static void
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apm_out(uint16_t port, uint8_t val, void *p)
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{
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apm_t *apm = (apm_t *) p;
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apm_log("[%04X:%08X] APM write: %04X = %02X (BX = %04X, CX = %04X)\n", CS, cpu_state.pc, port, val, BX, CX);
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port &= 0x0001;
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if (port == 0x0000) {
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apm->cmd = val;
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switch (apm->cmd) {
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case 0x07: /* Set Power State */
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if (CH == 0x00) switch (CX) {
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case 0x0000:
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#ifdef ENABLE_APM_LOG
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apm_log("APM Set Power State: APM Enabled\n");
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#endif
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break;
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case 0x0001:
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#ifdef ENABLE_APM_LOG
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apm_log("APM Set Power State: Standby\n");
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#endif
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break;
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case 0x0002:
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#ifdef ENABLE_APM_LOG
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apm_log("APM Set Power State: Suspend\n");
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#endif
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break;
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case 0x0003: /* Off */
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#ifdef ENABLE_APM_LOG
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apm_log("APM Set Power State: Off\n");
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#endif
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exit(-1);
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break;
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}
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break;
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}
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} else
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apm->stat = val;
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}
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static uint8_t
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apm_in(uint16_t port, void *p)
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{
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apm_t *apm = (apm_t *) p;
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apm_log("[%04X:%08X] APM read: %04X = FF\n", CS, cpu_state.pc, port);
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port &= 0x0001;
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if (port == 0x0000)
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return apm->cmd;
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else
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return apm->stat;
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}
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static void
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apm_close(void *p)
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{
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apm_t *dev = (apm_t *)p;
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free(dev);
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}
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static void
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*apm_init(const device_t *info)
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{
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apm_t *apm = (apm_t *) malloc(sizeof(apm_t));
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memset(apm, 0, sizeof(apm_t));
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io_sethandler(0x00b2, 0x0002, apm_in, NULL, NULL, apm_out, NULL, NULL, apm);
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return apm;
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}
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const device_t apm_device =
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{
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"Advanced Power Management",
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0,
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0,
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apm_init,
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apm_close,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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};
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