[REACTOS] Fix 64 bit build (#465)
[reactos.git] / hal / halx86 / generic / reboot.c
1 /*
2 * PROJECT: ReactOS HAL
3 * LICENSE: GPL - See COPYING in the top level directory
4 * FILE: hal/halx86/generic/reboot.c
5 * PURPOSE: Reboot functions
6 * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
7 * Eric Kohl
8 */
9
10 /* INCLUDES ******************************************************************/
11
12 #include <hal.h>
13 #define NDEBUG
14 #include <debug.h>
15
16 /* PRIVATE FUNCTIONS *********************************************************/
17
18 VOID
19 NTAPI
20 HalpWriteResetCommand(VOID)
21 {
22 /* Generate RESET signal via keyboard controller */
23 WRITE_PORT_UCHAR((PUCHAR)0x64, 0xFE);
24 };
25
26 VOID
27 NTAPI
28 HalpReboot(VOID)
29 {
30 PHYSICAL_ADDRESS PhysicalAddress;
31 UCHAR Data;
32 PVOID ZeroPageMapping;
33
34 /* Map the first physical page */
35 PhysicalAddress.QuadPart = 0;
36 ZeroPageMapping = HalpMapPhysicalMemory64(PhysicalAddress, 1);
37
38 /* Enable warm reboot */
39 ((PUSHORT)ZeroPageMapping)[0x239] = 0x1234;
40
41 /* Lock CMOS Access (and disable interrupts) */
42 HalpAcquireCmosSpinLock();
43
44 /* Setup control register B */
45 WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0B);
46 KeStallExecutionProcessor(1);
47
48 /* Read periodic register and clear the interrupt enable */
49 Data = READ_PORT_UCHAR((PUCHAR)0x71);
50 WRITE_PORT_UCHAR((PUCHAR)0x71, Data & ~0x40);
51 KeStallExecutionProcessor(1);
52
53 /* Setup control register A */
54 WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0A);
55 KeStallExecutionProcessor(1);
56
57 /* Read divider rate and reset it */
58 Data = READ_PORT_UCHAR((PUCHAR)0x71);
59 WRITE_PORT_UCHAR((PUCHAR)0x71, (Data & ~0x9) | 0x06);
60 KeStallExecutionProcessor(1);
61
62 /* Reset neutral CMOS address */
63 WRITE_PORT_UCHAR((PUCHAR)0x70, 0x15);
64 KeStallExecutionProcessor(1);
65
66 /* Flush write buffers and send the reset command */
67 KeFlushWriteBuffer();
68 HalpWriteResetCommand();
69
70 /* Halt the CPU */
71 __halt();
72 }
73
74 /* PUBLIC FUNCTIONS **********************************************************/
75
76 /*
77 * @implemented
78 */
79 VOID
80 NTAPI
81 HalReturnToFirmware(IN FIRMWARE_REENTRY Action)
82 {
83 /* Check what kind of action this is */
84 switch (Action)
85 {
86 /* All recognized actions */
87 case HalHaltRoutine:
88 case HalRebootRoutine:
89
90 #ifndef _MINIHAL_
91 /* Acquire the display */
92 InbvAcquireDisplayOwnership();
93 #endif
94
95 /* Call the internal reboot function */
96 HalpReboot();
97
98 /* Anything else */
99 default:
100
101 /* Print message and break */
102 DbgPrint("HalReturnToFirmware called!\n");
103 DbgBreakPoint();
104 }
105 }
106
107 /* EOF */