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82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/*
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* PROJECT: NEC PC-98 series HAL
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Reboot routine
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* COPYRIGHT: Copyright 2020 Dmitry Borisov (di.sean@protonmail.com)
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*/
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/* INCLUDES ******************************************************************/
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#include <hal.h>
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/* PRIVATE FUNCTIONS *********************************************************/
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#ifndef _MINIHAL_
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static DECLSPEC_NORETURN
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VOID
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HalpFreezeSystem(VOID)
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{
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/* Disable interrupts and halt the CPU */
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_disable();
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__halt();
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UNREACHABLE;
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}
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#endif
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DECLSPEC_NORETURN
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VOID
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HalpReboot(VOID)
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{
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/* Disable interrupts */
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_disable();
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/* Flush write buffers */
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KeFlushWriteBuffer();
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/* Send the reset command */
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WRITE_PORT_UCHAR((PUCHAR)PPI_IO_o_CONTROL, PPI_SHUTDOWN_0_ENABLE);
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WRITE_PORT_UCHAR((PUCHAR)PPI_IO_o_CONTROL, PPI_SHUTDOWN_1_ENABLE);
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WRITE_PORT_UCHAR((PUCHAR)CPU_IO_o_RESET, 0);
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/* Halt the CPU */
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__halt();
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UNREACHABLE;
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}
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/* PUBLIC FUNCTIONS **********************************************************/
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#ifndef _MINIHAL_
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VOID
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NTAPI
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HalReturnToFirmware(
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_In_ FIRMWARE_REENTRY Action)
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{
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switch (Action)
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{
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/* All recognized actions */
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case HalHaltRoutine:
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case HalPowerDownRoutine:
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HalpFreezeSystem();
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case HalRestartRoutine:
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case HalRebootRoutine:
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{
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/* Acquire the display */
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InbvAcquireDisplayOwnership();
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/* Call the internal reboot function */
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HalpReboot();
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}
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/* Anything else */
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default:
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{
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/* Print message and break */
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DbgPrint("HalReturnToFirmware called!\n");
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DbgBreakPoint();
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}
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}
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}
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#endif // _MINIHAL_
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/* EOF */
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