/* * @implemented */ VOID NTAPI HalStopProfileInterrupt(IN KPROFILE_SOURCE ProfileSource) { UCHAR StatusB; /* Acquire the CMOS lock */ HalpAcquireCmosSpinLock(); /* Read Status Register B */ StatusB = HalpReadCmos(RTC_REGISTER_B); /* Disable periodic interrupts */ StatusB = StatusB & ~RTC_REG_B_PI; /* Write new value into Status Register B */ HalpWriteCmos(RTC_REGISTER_B, StatusB); /* Release the CMOS lock */ HalpReleaseCmosSpinLock(); }
VOID HalpReboot ( VOID ) /*++ Routine Description: This procedure resets the CMOS clock to the standard timer settings so the bios will work, and then issues a reset command to the keyboard to cause a warm boot. It is very machine dependent, this implementation is intended for PC-AT like machines. This code copied from the "old debugger" sources. N.B. Will NOT return. --*/ { UCHAR Scratch; PUSHORT Magic; // // By sticking 0x1234 at physical location 0x472, we can bypass the // memory check after a reboot. // Magic = HalpMapPhysicalMemory(0, 1); Magic[0x472 / sizeof(USHORT)] = 0x1234; // // Turn off interrupts // HalpAcquireCmosSpinLock(); _asm { cli } // // Reset the cmos clock to a standard value // (We are setting the periodic interrupt control on the MC147818) // // // Disable periodic interrupt // WRITE_PORT_UCHAR(CMOS_CTRL, 0x0b); // Set up for control reg B. KeStallExecutionProcessor(1); Scratch = READ_PORT_UCHAR(CMOS_DATA); KeStallExecutionProcessor(1); Scratch &= 0xbf; // Clear periodic interrupt enable WRITE_PORT_UCHAR(CMOS_DATA, Scratch); KeStallExecutionProcessor(1); // // Set "standard" divider rate // WRITE_PORT_UCHAR(CMOS_CTRL, 0x0a); // Set up for control reg A. KeStallExecutionProcessor(1); Scratch = READ_PORT_UCHAR(CMOS_DATA); KeStallExecutionProcessor(1); Scratch &= 0xf0; // Clear rate setting Scratch |= 6; // Set default rate and divider WRITE_PORT_UCHAR(CMOS_DATA, Scratch); KeStallExecutionProcessor(1); // // Set a "neutral" cmos address to prevent weirdness // (Why is this needed? Source this was copied from doesn't say) // WRITE_PORT_UCHAR(CMOS_CTRL, 0x15); KeStallExecutionProcessor(1); // // for 3450/3550 machines - Set shutdown flag to reset // if ((NCRPlatform == NCR3450) || (NCRPlatform == NCR3550)) { WRITE_PORT_UCHAR(CMOS_CTRL, SHUT_DOWN); WRITE_PORT_UCHAR(CMOS_DATA, SHUT5); } // // Send the reset command to the keyboard controller // WRITE_PORT_UCHAR(KEYBPORT, RESETCMD); _asm { hlt } }