Initial Contribution

1 files changed, 0 insertions, 463 deletions

diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
deleted file mode 100644
index 9d4cbed..0000000
--- a/hw/mc146818rtc.c
+++ /dev/null
@@ -1,463 +0,0 @@
-/*
- * QEMU MC146818 RTC emulation
- * 
- * Copyright (c) 2003-2004 Fabrice Bellard
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "vl.h"
-
-//#define DEBUG_CMOS
-
-#define RTC_SECONDS             0
-#define RTC_SECONDS_ALARM       1
-#define RTC_MINUTES             2
-#define RTC_MINUTES_ALARM       3
-#define RTC_HOURS               4
-#define RTC_HOURS_ALARM         5
-#define RTC_ALARM_DONT_CARE    0xC0
-
-#define RTC_DAY_OF_WEEK         6
-#define RTC_DAY_OF_MONTH        7
-#define RTC_MONTH               8
-#define RTC_YEAR                9
-
-#define RTC_REG_A               10
-#define RTC_REG_B               11
-#define RTC_REG_C               12
-#define RTC_REG_D               13
-
-#define REG_A_UIP 0x80
-
-#define REG_B_SET 0x80
-#define REG_B_PIE 0x40
-#define REG_B_AIE 0x20
-#define REG_B_UIE 0x10
-
-struct RTCState {
-    uint8_t cmos_data[128];
-    uint8_t cmos_index;
-    struct tm current_tm;
-    int irq;
-    /* periodic timer */
-    QEMUTimer *periodic_timer;
-    int64_t next_periodic_time;
-    /* second update */
-    int64_t next_second_time;
-    QEMUTimer *second_timer;
-    QEMUTimer *second_timer2;
-};
-
-static void rtc_set_time(RTCState *s);
-static void rtc_copy_date(RTCState *s);
-
-static void rtc_timer_update(RTCState *s, int64_t current_time)
-{
-    int period_code, period;
-    int64_t cur_clock, next_irq_clock;
-
-    period_code = s->cmos_data[RTC_REG_A] & 0x0f;
-    if (period_code != 0 && 
-        (s->cmos_data[RTC_REG_B] & REG_B_PIE)) {
-        if (period_code <= 2)
-            period_code += 7;
-        /* period in 32 Khz cycles */
-        period = 1 << (period_code - 1);
-        /* compute 32 khz clock */
-        cur_clock = muldiv64(current_time, 32768, ticks_per_sec);
-        next_irq_clock = (cur_clock & ~(period - 1)) + period;
-        s->next_periodic_time = muldiv64(next_irq_clock, ticks_per_sec, 32768) + 1;
-        qemu_mod_timer(s->periodic_timer, s->next_periodic_time);
-    } else {
-        qemu_del_timer(s->periodic_timer);
-    }
-}
-
-static void rtc_periodic_timer(void *opaque)
-{
-    RTCState *s = opaque;
-
-    rtc_timer_update(s, s->next_periodic_time);
-    s->cmos_data[RTC_REG_C] |= 0xc0;
-    pic_set_irq(s->irq, 1);
-}
-
-static void cmos_ioport_write(void *opaque, uint32_t addr, uint32_t data)
-{
-    RTCState *s = opaque;
-
-    if ((addr & 1) == 0) {
-        s->cmos_index = data & 0x7f;
-    } else {
-#ifdef DEBUG_CMOS
-        printf("cmos: write index=0x%02x val=0x%02x\n",
-               s->cmos_index, data);
-#endif        
-        switch(s->cmos_index) {
-        case RTC_SECONDS_ALARM:
-        case RTC_MINUTES_ALARM:
-        case RTC_HOURS_ALARM:
-            /* XXX: not supported */
-            s->cmos_data[s->cmos_index] = data;
-            break;
-        case RTC_SECONDS:
-        case RTC_MINUTES:
-        case RTC_HOURS:
-        case RTC_DAY_OF_WEEK:
-        case RTC_DAY_OF_MONTH:
-        case RTC_MONTH:
-        case RTC_YEAR:
-            s->cmos_data[s->cmos_index] = data;
-            /* if in set mode, do not update the time */
-            if (!(s->cmos_data[RTC_REG_B] & REG_B_SET)) {
-                rtc_set_time(s);
-            }
-            break;
-        case RTC_REG_A:
-            /* UIP bit is read only */
-            s->cmos_data[RTC_REG_A] = (data & ~REG_A_UIP) |
-                (s->cmos_data[RTC_REG_A] & REG_A_UIP);
-            rtc_timer_update(s, qemu_get_clock(vm_clock));
-            break;
-        case RTC_REG_B:
-            if (data & REG_B_SET) {
-                /* set mode: reset UIP mode */
-                s->cmos_data[RTC_REG_A] &= ~REG_A_UIP;
-                data &= ~REG_B_UIE;
-            } else {
-                /* if disabling set mode, update the time */
-                if (s->cmos_data[RTC_REG_B] & REG_B_SET) {
-                    rtc_set_time(s);
-                }
-            }
-            s->cmos_data[RTC_REG_B] = data;
-            rtc_timer_update(s, qemu_get_clock(vm_clock));
-            break;
-        case RTC_REG_C:
-        case RTC_REG_D:
-            /* cannot write to them */
-            break;
-        default:
-            s->cmos_data[s->cmos_index] = data;
-            break;
-        }
-    }
-}
-
-static inline int to_bcd(RTCState *s, int a)
-{
-    if (s->cmos_data[RTC_REG_B] & 0x04) {
-        return a;
-    } else {
-        return ((a / 10) << 4) | (a % 10);
-    }
-}
-
-static inline int from_bcd(RTCState *s, int a)
-{
-    if (s->cmos_data[RTC_REG_B] & 0x04) {
-        return a;
-    } else {
-        return ((a >> 4) * 10) + (a & 0x0f);
-    }
-}
-
-static void rtc_set_time(RTCState *s)
-{
-    struct tm *tm = &s->current_tm;
-
-    tm->tm_sec = from_bcd(s, s->cmos_data[RTC_SECONDS]);
-    tm->tm_min = from_bcd(s, s->cmos_data[RTC_MINUTES]);
-    tm->tm_hour = from_bcd(s, s->cmos_data[RTC_HOURS] & 0x7f);
-    if (!(s->cmos_data[RTC_REG_B] & 0x02) &&
-        (s->cmos_data[RTC_HOURS] & 0x80)) {
-        tm->tm_hour += 12;
-    }
-    tm->tm_wday = from_bcd(s, s->cmos_data[RTC_DAY_OF_WEEK]);
-    tm->tm_mday = from_bcd(s, s->cmos_data[RTC_DAY_OF_MONTH]);
-    tm->tm_mon = from_bcd(s, s->cmos_data[RTC_MONTH]) - 1;
-    tm->tm_year = from_bcd(s, s->cmos_data[RTC_YEAR]) + 100;
-}
-
-static void rtc_copy_date(RTCState *s)
-{
-    const struct tm *tm = &s->current_tm;
-
-    s->cmos_data[RTC_SECONDS] = to_bcd(s, tm->tm_sec);
-    s->cmos_data[RTC_MINUTES] = to_bcd(s, tm->tm_min);
-    if (s->cmos_data[RTC_REG_B] & 0x02) {
-        /* 24 hour format */
-        s->cmos_data[RTC_HOURS] = to_bcd(s, tm->tm_hour);
-    } else {
-        /* 12 hour format */
-        s->cmos_data[RTC_HOURS] = to_bcd(s, tm->tm_hour % 12);
-        if (tm->tm_hour >= 12)
-            s->cmos_data[RTC_HOURS] |= 0x80;
-    }
-    s->cmos_data[RTC_DAY_OF_WEEK] = to_bcd(s, tm->tm_wday);
-    s->cmos_data[RTC_DAY_OF_MONTH] = to_bcd(s, tm->tm_mday);
-    s->cmos_data[RTC_MONTH] = to_bcd(s, tm->tm_mon + 1);
-    s->cmos_data[RTC_YEAR] = to_bcd(s, tm->tm_year % 100);
-}
-
-/* month is between 0 and 11. */
-static int get_days_in_month(int month, int year)
-{
-    static const int days_tab[12] = { 
-        31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 
-    };
-    int d;
-    if ((unsigned )month >= 12)
-        return 31;
-    d = days_tab[month];
-    if (month == 1) {
-        if ((year % 4) == 0 && ((year % 100) != 0 || (year % 400) == 0))
-            d++;
-    }
-    return d;
-}
-
-/* update 'tm' to the next second */
-static void rtc_next_second(struct tm *tm)
-{
-    int days_in_month;
-
-    tm->tm_sec++;
-    if ((unsigned)tm->tm_sec >= 60) {
-        tm->tm_sec = 0;
-        tm->tm_min++;
-        if ((unsigned)tm->tm_min >= 60) {
-            tm->tm_min = 0;
-            tm->tm_hour++;
-            if ((unsigned)tm->tm_hour >= 24) {
-                tm->tm_hour = 0;
-                /* next day */
-                tm->tm_wday++;
-                if ((unsigned)tm->tm_wday >= 7)
-                    tm->tm_wday = 0;
-                days_in_month = get_days_in_month(tm->tm_mon, 
-                                                  tm->tm_year + 1900);
-                tm->tm_mday++;
-                if (tm->tm_mday < 1) {
-                    tm->tm_mday = 1;
-                } else if (tm->tm_mday > days_in_month) {
-                    tm->tm_mday = 1;
-                    tm->tm_mon++;
-                    if (tm->tm_mon >= 12) {
-                        tm->tm_mon = 0;
-                        tm->tm_year++;
-                    }
-                }
-            }
-        }
-    }
-}
-
-
-static void rtc_update_second(void *opaque)
-{
-    RTCState *s = opaque;
-    int64_t delay;
-
-    /* if the oscillator is not in normal operation, we do not update */
-    if ((s->cmos_data[RTC_REG_A] & 0x70) != 0x20) {
-        s->next_second_time += ticks_per_sec;
-        qemu_mod_timer(s->second_timer, s->next_second_time);
-    } else {
-        rtc_next_second(&s->current_tm);
-        
-        if (!(s->cmos_data[RTC_REG_B] & REG_B_SET)) {
-            /* update in progress bit */
-            s->cmos_data[RTC_REG_A] |= REG_A_UIP;
-        }
-        /* should be 244 us = 8 / 32768 seconds, but currently the
-           timers do not have the necessary resolution. */
-        delay = (ticks_per_sec * 1) / 100;
-        if (delay < 1)
-            delay = 1;
-        qemu_mod_timer(s->second_timer2, 
-                       s->next_second_time + delay);
-    }
-}
-
-static void rtc_update_second2(void *opaque)
-{
-    RTCState *s = opaque;
-
-    if (!(s->cmos_data[RTC_REG_B] & REG_B_SET)) {
-        rtc_copy_date(s);
-    }
-
-    /* check alarm */
-    if (s->cmos_data[RTC_REG_B] & REG_B_AIE) {
-        if (((s->cmos_data[RTC_SECONDS_ALARM] & 0xc0) == 0xc0 ||
-             s->cmos_data[RTC_SECONDS_ALARM] == s->current_tm.tm_sec) &&
-            ((s->cmos_data[RTC_MINUTES_ALARM] & 0xc0) == 0xc0 ||
-             s->cmos_data[RTC_MINUTES_ALARM] == s->current_tm.tm_mon) &&
-            ((s->cmos_data[RTC_HOURS_ALARM] & 0xc0) == 0xc0 ||
-             s->cmos_data[RTC_HOURS_ALARM] == s->current_tm.tm_hour)) {
-
-            s->cmos_data[RTC_REG_C] |= 0xa0; 
-            pic_set_irq(s->irq, 1);
-        }
-    }
-
-    /* update ended interrupt */
-    if (s->cmos_data[RTC_REG_B] & REG_B_UIE) {
-        s->cmos_data[RTC_REG_C] |= 0x90; 
-        pic_set_irq(s->irq, 1);
-    }
-
-    /* clear update in progress bit */
-    s->cmos_data[RTC_REG_A] &= ~REG_A_UIP;
-
-    s->next_second_time += ticks_per_sec;
-    qemu_mod_timer(s->second_timer, s->next_second_time);
-}
-
-static uint32_t cmos_ioport_read(void *opaque, uint32_t addr)
-{
-    RTCState *s = opaque;
-    int ret;
-    if ((addr & 1) == 0) {
-        return 0xff;
-    } else {
-        switch(s->cmos_index) {
-        case RTC_SECONDS:
-        case RTC_MINUTES:
-        case RTC_HOURS:
-        case RTC_DAY_OF_WEEK:
-        case RTC_DAY_OF_MONTH:
-        case RTC_MONTH:
-        case RTC_YEAR:
-            ret = s->cmos_data[s->cmos_index];
-            break;
-        case RTC_REG_A:
-            ret = s->cmos_data[s->cmos_index];
-            break;
-        case RTC_REG_C:
-            ret = s->cmos_data[s->cmos_index];
-            pic_set_irq(s->irq, 0);
-            s->cmos_data[RTC_REG_C] = 0x00; 
-            break;
-        default:
-            ret = s->cmos_data[s->cmos_index];
-            break;
-        }
-#ifdef DEBUG_CMOS
-        printf("cmos: read index=0x%02x val=0x%02x\n",
-               s->cmos_index, ret);
-#endif
-        return ret;
-    }
-}
-
-void rtc_set_memory(RTCState *s, int addr, int val)
-{
-    if (addr >= 0 && addr <= 127)
-        s->cmos_data[addr] = val;
-}
-
-void rtc_set_date(RTCState *s, const struct tm *tm)
-{
-    s->current_tm = *tm;
-    rtc_copy_date(s);
-}
-
-static void rtc_save(QEMUFile *f, void *opaque)
-{
-    RTCState *s = opaque;
-
-    qemu_put_buffer(f, s->cmos_data, 128);
-    qemu_put_8s(f, &s->cmos_index);
-    
-    qemu_put_be32s(f, &s->current_tm.tm_sec);
-    qemu_put_be32s(f, &s->current_tm.tm_min);
-    qemu_put_be32s(f, &s->current_tm.tm_hour);
-    qemu_put_be32s(f, &s->current_tm.tm_wday);
-    qemu_put_be32s(f, &s->current_tm.tm_mday);
-    qemu_put_be32s(f, &s->current_tm.tm_mon);
-    qemu_put_be32s(f, &s->current_tm.tm_year);
-
-    qemu_put_timer(f, s->periodic_timer);
-    qemu_put_be64s(f, &s->next_periodic_time);
-
-    qemu_put_be64s(f, &s->next_second_time);
-    qemu_put_timer(f, s->second_timer);
-    qemu_put_timer(f, s->second_timer2);
-}
-
-static int rtc_load(QEMUFile *f, void *opaque, int version_id)
-{
-    RTCState *s = opaque;
-
-    if (version_id != 1)
-        return -EINVAL;
-
-    qemu_get_buffer(f, s->cmos_data, 128);
-    qemu_get_8s(f, &s->cmos_index);
-
-    qemu_get_be32s(f, &s->current_tm.tm_sec);
-    qemu_get_be32s(f, &s->current_tm.tm_min);
-    qemu_get_be32s(f, &s->current_tm.tm_hour);
-    qemu_get_be32s(f, &s->current_tm.tm_wday);
-    qemu_get_be32s(f, &s->current_tm.tm_mday);
-    qemu_get_be32s(f, &s->current_tm.tm_mon);
-    qemu_get_be32s(f, &s->current_tm.tm_year);
-
-    qemu_get_timer(f, s->periodic_timer);
-    qemu_get_be64s(f, &s->next_periodic_time);
-
-    qemu_get_be64s(f, &s->next_second_time);
-    qemu_get_timer(f, s->second_timer);
-    qemu_get_timer(f, s->second_timer2);
-    return 0;
-}
-
-RTCState *rtc_init(int base, int irq)
-{
-    RTCState *s;
-
-    s = qemu_mallocz(sizeof(RTCState));
-    if (!s)
-        return NULL;
-
-    s->irq = irq;
-    s->cmos_data[RTC_REG_A] = 0x26;
-    s->cmos_data[RTC_REG_B] = 0x02;
-    s->cmos_data[RTC_REG_C] = 0x00;
-    s->cmos_data[RTC_REG_D] = 0x80;
-
-    s->periodic_timer = qemu_new_timer(vm_clock, 
-                                       rtc_periodic_timer, s);
-    s->second_timer = qemu_new_timer(vm_clock, 
-                                     rtc_update_second, s);
-    s->second_timer2 = qemu_new_timer(vm_clock, 
-                                      rtc_update_second2, s);
-
-    s->next_second_time = qemu_get_clock(vm_clock) + (ticks_per_sec * 99) / 100;
-    qemu_mod_timer(s->second_timer2, s->next_second_time);
-
-    register_ioport_write(base, 2, 1, cmos_ioport_write, s);
-    register_ioport_read(base, 2, 1, cmos_ioport_read, s);
-
-    register_savevm("mc146818rtc", base, 1, rtc_save, rtc_load, s);
-    return s;
-}
-