mirror of https://github.com/bochs-emu/Bochs
- implementation of the date and time change support
- implementation of the UIP bit using a new timer handler. The one_second_timer() function only sets the UIP bit and starts the UIP timer. The uip_timer() function handles the date / time update, the alarm check and finally clears the UIP bit. - writing to control register A doesn't change the UIP bit
This commit is contained in:
Volker Ruppert
parent
9286ce7dd6
commit
aefd5c6441
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@ -1,5 +1,5 @@
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/////////////////////////////////////////////////////////////////////////
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// $Id: cmos.cc,v 1.33 2002-12-07 15:53:02 vruppert Exp $
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// $Id: cmos.cc,v 1.34 2003-01-04 00:02:05 vruppert Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2002 MandrakeSoft S.A.
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@ -97,6 +97,7 @@ bx_cmos_c::bx_cmos_c(void)
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s.reg[i] = 0;
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s.periodic_timer_index = BX_NULL_TIMER_HANDLE;
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s.one_second_timer_index = BX_NULL_TIMER_HANDLE;
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s.uip_timer_index = BX_NULL_TIMER_HANDLE;
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}
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bx_cmos_c::~bx_cmos_c(void)
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@ -108,7 +109,7 @@ bx_cmos_c::~bx_cmos_c(void)
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void
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bx_cmos_c::init(void)
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{
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BX_DEBUG(("Init $Id: cmos.cc,v 1.33 2002-12-07 15:53:02 vruppert Exp $"));
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BX_DEBUG(("Init $Id: cmos.cc,v 1.34 2003-01-04 00:02:05 vruppert Exp $"));
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// CMOS RAM & RTC
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DEV_register_ioread_handler(this, read_handler, 0x0070, "CMOS RAM", 7);
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@ -126,6 +127,11 @@ bx_cmos_c::init(void)
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DEV_register_timer(this, one_second_timer_handler,
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1000000, 1,0, "cmos"); // continuous, not-active
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}
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if (BX_CMOS_THIS s.uip_timer_index == BX_NULL_TIMER_HANDLE) {
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BX_CMOS_THIS s.uip_timer_index =
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DEV_register_timer(this, uip_timer_handler,
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244, 0, 0, "cmos"); // one-shot, not-active
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}
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#if BX_USE_SPECIFIED_TIME0 == 0
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// ??? this will not be correct for using an image file.
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@ -370,6 +376,9 @@ bx_cmos_c::write(Bit32u address, Bit32u value, unsigned io_len)
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//BX_INFO(("write reg 0x%02x: value = 0x%02x",
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// (unsigned) BX_CMOS_THIS s.cmos_mem_address, (unsigned) value);
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BX_CMOS_THIS s.reg[BX_CMOS_THIS s.cmos_mem_address] = value;
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if (BX_CMOS_THIS s.cmos_mem_address == REG_IBM_PS2_CENTURY_BYTE) {
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BX_CMOS_THIS s.reg[REG_IBM_CENTURY_BYTE] = value;
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}
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if (BX_CMOS_THIS s.reg[REG_STAT_B] & 0x80) {
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BX_CMOS_THIS s.timeval_change = 1;
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} else {
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@ -415,7 +424,8 @@ bx_cmos_c::write(Bit32u address, Bit32u value, unsigned io_len)
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if (dcc != 0x02) {
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BX_PANIC(("CRA: divider chain control 0x%02x", dcc));
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}
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BX_CMOS_THIS s.reg[REG_STAT_A] = value & 0x7f;
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BX_CMOS_THIS s.reg[REG_STAT_A] &= 0x80;
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BX_CMOS_THIS s.reg[REG_STAT_A] |= (value & 0x7f);
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BX_CMOS_THIS CRA_change();
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return;
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break;
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@ -617,6 +627,24 @@ bx_cmos_c::one_second_timer()
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if (BX_CMOS_THIS s.reg[REG_STAT_B] & 0x80)
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return;
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BX_CMOS_THIS s.reg[REG_STAT_A] |= 0x80; // set UIP bit
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// UIP timer for updating clock & alarm functions
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bx_pc_system.activate_timer(BX_CMOS_THIS s.uip_timer_index,
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244, 0);
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}
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void
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bx_cmos_c::uip_timer_handler(void *this_ptr)
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{
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bx_cmos_c *class_ptr = (bx_cmos_c *) this_ptr;
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class_ptr->uip_timer();
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}
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void
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bx_cmos_c::uip_timer()
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{
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update_clock();
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// if update interrupts are enabled, trip IRQ 8, and
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@ -650,6 +678,7 @@ bx_cmos_c::one_second_timer()
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DEV_pic_raise_irq(8);
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}
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}
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BX_CMOS_THIS s.reg[REG_STAT_A] &= 0x7f; // clear UIP bit
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}
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@ -710,5 +739,48 @@ bx_cmos_c::update_clock()
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void
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bx_cmos_c::update_timeval()
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{
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BX_ERROR(("changing time and date not supported yet"));
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struct tm time_calendar;
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Bit8u val_bin;
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// update seconds
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val_bin =
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((BX_CMOS_THIS s.reg[REG_SEC] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_SEC] & 0x0f);
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time_calendar.tm_sec = val_bin;
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// update minutes
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val_bin =
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((BX_CMOS_THIS s.reg[REG_MIN] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_MIN] & 0x0f);
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time_calendar.tm_min = val_bin;
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// update hours
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val_bin =
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((BX_CMOS_THIS s.reg[REG_HOUR] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_HOUR] & 0x0f);
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time_calendar.tm_hour = val_bin;
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// update day of the month
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val_bin =
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((BX_CMOS_THIS s.reg[REG_MONTH_DAY] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_MONTH_DAY] & 0x0f);
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time_calendar.tm_mday = val_bin;
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// update month
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val_bin =
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((BX_CMOS_THIS s.reg[REG_MONTH] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_MONTH] & 0x0f);
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time_calendar.tm_mon = val_bin - 1;
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// update year
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val_bin =
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((BX_CMOS_THIS s.reg[REG_IBM_CENTURY_BYTE] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_IBM_CENTURY_BYTE] & 0x0f);
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val_bin = (val_bin - 19) * 100;
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val_bin +=
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((BX_CMOS_THIS s.reg[REG_YEAR] >> 4) * 10) |
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(BX_CMOS_THIS s.reg[REG_YEAR] & 0x0f);
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time_calendar.tm_year = val_bin;
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BX_CMOS_THIS s.timeval = mktime(& time_calendar);
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}
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@ -1,5 +1,5 @@
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/////////////////////////////////////////////////////////////////////////
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// $Id: cmos.h,v 1.8 2002-12-07 15:53:02 vruppert Exp $
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// $Id: cmos.h,v 1.9 2003-01-04 00:02:07 vruppert Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2002 MandrakeSoft S.A.
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@ -60,6 +60,7 @@ public:
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int periodic_timer_index;
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Bit32u periodic_interval_usec;
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int one_second_timer_index;
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int uip_timer_index;
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time_t timeval;
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Bit8u cmos_mem_address;
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bx_bool timeval_change;
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@ -78,8 +79,10 @@ private:
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public:
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static void periodic_timer_handler(void *);
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static void one_second_timer_handler(void *);
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static void uip_timer_handler(void *);
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BX_CMOS_SMF void periodic_timer(void);
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BX_CMOS_SMF void one_second_timer(void);
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BX_CMOS_SMF void uip_timer(void);
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private:
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BX_CMOS_SMF void update_clock(void);
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BX_CMOS_SMF void update_timeval(void);
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