X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Fnvram.c;fp=palacios%2Fsrc%2Fdevices%2Fnvram.c;h=8df8b79c0d70c74a3525fba6ff3ae8c69e660e3e;hb=aad69eda8e2354cf146054e57ad25fe201a1cb52;hp=ef37366ee28b06e2603aa48eedcb507946c68101;hpb=07820ee58e9b356341ce86cd2b2938d3abef60c9;p=palacios.git diff --git a/palacios/src/devices/nvram.c b/palacios/src/devices/nvram.c index ef37366..8df8b79 100644 --- a/palacios/src/devices/nvram.c +++ b/palacios/src/devices/nvram.c @@ -9,12 +9,10 @@ #endif - - - #define NVRAM_REG_PORT 0x70 #define NVRAM_DATA_PORT 0x71 +#define NVRAM_RTC_IRQ 0x8 typedef enum {NVRAM_READY, NVRAM_REG_POSTED} nvram_state_t; @@ -75,14 +73,312 @@ struct nvram_internal { nvram_state_t dev_state; uchar_t thereg; uchar_t mem_state[NVRAM_REG_MAX]; + + uint_t us; //microseconds - for clock update - zeroed every second + uint_t pus; //microseconds - for periodic interrupt - cleared every period }; +struct rtc_stata { + uint_t rate: 4; // clock rate = 65536Hz / 2 rate (0110=1024 Hz) + uint_t basis: 3; // time base, 010 = 32,768 Hz + uint_t uip: 1; // 1=update in progress +} __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; + +struct rtc_statb { + uint_t sum: 1; // 1=summer (daylight savings) + uint_t h24: 1; // 1=24h clock + uint_t dm: 1; // 1=date/time is in bcd, 0=binary + uint_t rec: 1; // 1=rectangular signal + uint_t ui: 1; // 1=update interrupt + uint_t ai: 1; // 1=alarm interrupt + uint_t pi: 1; // 1=periodic interrupt + uint_t set: 1; // 1=blocked update +} __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; + +struct rtc_statc { + uint_t res: 4; // reserved + uint_t uf: 1; // 1=source of interrupt is update + uint_t af: 1; // 1=source of interrupt is alarm interrupt + uint_t pf: 1; // 1=source of interrupt is periodic interrupt + uint_t irq: 1; // 1=interrupt requested +} __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; + +struct rtc_statd { + uint_t res: 7; // reserved + uint_t val: 1; // 1=cmos ram data is OK +} __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; + + + + +struct vm_device *thedev=NULL; + + +static struct vm_device *demultiplex_timer_interrupt(uint_t period_us) +{ + // hack + return thedev; +} + +struct bcd_num { + uchar_t bot:4; + uchar_t top:4; +} ; + +static uchar_t add_to(uchar_t *left, uchar_t *right, uchar_t bcd) +{ + uchar_t temp; + + if (bcd) { + struct bcd_num *bl = (struct bcd_num *)left; + struct bcd_num *br = (struct bcd_num *)right; + uchar_t carry=0; + + bl->bot += br->bot; + carry = bl->bot / 0xa; + bl->bot %= 0xa; + bl->top += carry + br->top; + carry = bl->top / 0xa; + bl->top %= 0xa; + return carry; + } else { + temp=*left; + *left+=*right; + if (*leftprivate_data); + struct rtc_stata *stata = (struct rtc_stata *) &((data->mem_state[NVRAM_REG_STAT_A])); + struct rtc_statb *statb = (struct rtc_statb *) &((data->mem_state[NVRAM_REG_STAT_B])); + struct rtc_statc *statc = (struct rtc_statc *) &((data->mem_state[NVRAM_REG_STAT_C])); + //struct rtc_statd *statd = (struct rtc_statd *) &((data->mem_state[NVRAM_REG_STAT_D])); + uchar_t *sec = (uchar_t *) &(data->mem_state[NVRAM_REG_SEC]); + uchar_t *min = (uchar_t *) &(data->mem_state[NVRAM_REG_MIN]); + uchar_t *hour = (uchar_t *) &(data->mem_state[NVRAM_REG_HOUR]); + uchar_t *weekday = (uchar_t *) &(data->mem_state[NVRAM_REG_WEEK_DAY]); + uchar_t *monthday = (uchar_t *) &(data->mem_state[NVRAM_REG_MONTH_DAY]); + uchar_t *month = (uchar_t *) &(data->mem_state[NVRAM_REG_MONTH]); + uchar_t *year = (uchar_t *) &(data->mem_state[NVRAM_REG_YEAR]); + uchar_t *cent = (uchar_t *) &(data->mem_state[NVRAM_REG_IBM_CENTURY_BYTE]); + uchar_t *seca = (uchar_t *) &(data->mem_state[NVRAM_REG_SEC_ALARM]); + uchar_t *mina = (uchar_t *) &(data->mem_state[NVRAM_REG_MIN_ALARM]); + uchar_t *houra = (uchar_t *) &(data->mem_state[NVRAM_REG_HOUR_ALARM]); + uchar_t hour24; + + uchar_t bcd = (statb->dm==1); + uchar_t carry=0; + uchar_t nextday=0; + uint_t periodic_period; + + //PrintDebug("nvram: sizeof(struct rtc_stata)=%d\n", sizeof(struct rtc_stata)); + + + //PrintDebug("nvram: update_time\n",statb->pi); + + // We will set these flags on exit + statc->irq=statc->pf=statc->af=statc->uf=0; + + // We will reset us after one second + data->us += period_us; + // We will reset pus after one periodic_period + data->pus += period_us; + + if (data->us > 1000000) { + carry=1; + //PrintDebug("nvram: adding 1 to seconds=0x%x (bcd=%d)...", *sec, bcd); + carry=add_to(sec,&carry,bcd); + //PrintDebug("got 0x%x with carry=%d\n",*sec,carry); + if (carry) { PrintDebug("nvram: somehow managed to get a carry in second update\n"); } + if ((bcd && *sec==0x60) || (!bcd && *sec==60)) { + *sec=0; + carry=1; + carry=add_to(min,&carry,bcd); + if (carry) { PrintDebug("nvram: somehow managed to get a carry in minute update\n"); } + if ((bcd && *min==0x60) || (!bcd && *min==60)) { + *min=0; + hour24 = *hour; + if (!(statb->h24)) { + if (hour24&0x80) { + hour24&=0x8f; + uchar_t temp = bcd ? 0x12 : 12; + add_to(&hour24,&temp, bcd); + } + } + carry=1; + carry=add_to(&hour24,&carry,bcd); + if (carry) { PrintDebug("nvram: somehow managed to get a carry in hour update\n"); } + if ((bcd && hour24==0x24) || (!bcd && hour24==24)) { + carry=1; + nextday=1; + hour24=0; + } else { + carry=0; + } + if (statb->h24) { + *hour=hour24; + } else { + if ((bcd && hour24<0x12) || (!bcd && hour24<12)) { + *hour=hour24; + } else { + if (!bcd) { + *hour = (hour24-12) | 0x80; + } else { + *hour = hour24; + struct bcd_num *n = (struct bcd_num *) hour; + if (n->bot<0x2) { + n->top--; + n->bot+=0xa; + } + n->bot-=0x2; + n->top-=0x1; + } + } + } + // now see if we need to carry into the days and further + if (nextday) { + carry=1; + add_to(weekday, &carry, bcd); + *weekday%=0x7; // same regardless of bcd + if (!(*monthday==days_in_month(dev,*month,bcd))) { + add_to(monthday, &carry, bcd); + } else { + *monthday=0x1; + carry=1; + add_to(month,&carry,bcd); + if ((bcd && *month==0x13) || (!bcd && *month==13)) { + *month=1; // same for both + carry=1; + carry=add_to(year,&carry,bcd); + if ((bcd && carry) || (!bcd && *year==100)) { + *year=0; + carry=1; + add_to(cent,&carry,bcd); + } + } + } + } + } + } + data->us-=1000000; + // OK, now check for the alarm, if it is set to interrupt + if (statb->ai) { + if (*sec==*seca && *min==*mina && *hour==*houra) { + statc->af=1; + PrintDebug("nvram: interrupt on alarm\n"); + } + } + } + + if (statb->pi) { + periodic_period = 1000000/(65536/(0x1 << stata->rate)); + if (data->pus >= periodic_period) { + statc->pf=1; + data->pus -= periodic_period; + PrintDebug("nvram: interrupt on periodic\n"); + } + } + + if (statb->ui) { + statc->uf=1; + PrintDebug("nvram: interrupt on update\n"); + } + + statc->irq= statc->pf || statc->af || statc->uf; + + //PrintDebug("nvram: time is now: YMDHMS: 0x%x:0x%x:0x%x:0x%x:0x%x,0x%x bcd=%d\n", *year, *month, *monthday, *hour, *min, *sec,bcd); + + // Interrupt associated VM, if needed + if (statc->irq) { + PrintDebug("nvram: injecting interrupt\n"); + dev->vm->vm_ops.raise_irq(dev->vm, NVRAM_RTC_IRQ); + } +} + + + + +void deliver_timer_interrupt_to_vmm(uint_t period_us) +{ + struct vm_device *dev = demultiplex_timer_interrupt(period_us); + + if (dev) { + update_time(dev,period_us); + } + +} + static int set_nvram_defaults(struct vm_device *dev) { struct nvram_internal * nvram_state = (struct nvram_internal*) dev->private_data; + + + // // 2 1.44 MB floppy drives // @@ -139,17 +435,31 @@ static int set_nvram_defaults(struct vm_device *dev) // RTC status A - // time update in progress, default timebase (32KHz, default interrupt rate 1KHz) - // 10100110 - nvram_state->mem_state[NVRAM_REG_STAT_A] = 0xa6; + // 00100110 = no update in progress, base=32768 Hz, rate = 1024 Hz + nvram_state->mem_state[NVRAM_REG_STAT_A] = 0x26; // RTC status B - // time updates, default timebase (32KHz, default interrupt rate 1KHz) - // 10100110 - //nvram_state->mem_state[NVRAM_REG_STAT_B] = 0xa6; - + // 00000100 = not setting, no interrupts, blocked rect signal, bcd mode, 24 hour, normal time + nvram_state->mem_state[NVRAM_REG_STAT_B] = 0x06; + // RTC status C + // No IRQ requested, result not do to any source + nvram_state->mem_state[NVRAM_REG_STAT_C] = 0x00; + + // RTC status D + // Battery is OK + nvram_state->mem_state[NVRAM_REG_STAT_D] = 0x80; + + + // january 1, 2008, 00:00:00 + nvram_state->mem_state[NVRAM_REG_MONTH] = 0x1; + nvram_state->mem_state[NVRAM_REG_MONTH_DAY] = 0x1; + nvram_state->mem_state[NVRAM_REG_WEEK_DAY] = 0x1; + nvram_state->mem_state[NVRAM_REG_YEAR] = 0x08; + + nvram_state->us=nvram_state->pus=0; + return 0; } @@ -292,10 +602,15 @@ static struct vm_device_ops dev_ops = { struct vm_device *create_nvram() { struct nvram_internal * nvram_state = (struct nvram_internal *)V3_Malloc(sizeof(struct nvram_internal)+1000); - PrintDebug("internal at %x\n",nvram_state); + PrintDebug("nvram: internal at %x\n",nvram_state); struct vm_device *device = create_device("NVRAM", &dev_ops, nvram_state); + if (thedev!=NULL) { + PrintDebug("nvram: warning! overwriting thedev\n"); + } + + thedev=device; return device; }