Update timer subsystem with multi-backend dispatch table

sdk/xtdk/amd64/hltypes.h

@@ -307,6 +307,17 @@ typedef enum _PIC_I8259_ICW4_SYSTEM_MODE
     New8086Mode
 } PIC_I8259_ICW4_SYSTEM_MODE, *PPIC_I8259_ICW4_SYSTEM_MODE;
 
+/* Supported hardware timer backends */
+typedef enum _TIMER_TYPE
+{
+    TimerNone,
+    TimerAcpiPm,
+    TimerHpet,
+    TimerLapic,
+    TimerPit,
+    TimerTsc
+} TIMER_TYPE, *PTIMER_TYPE;
+
 /* APIC Base Register */
 typedef union _APIC_BASE_REGISTER
 {
@@ -500,6 +511,7 @@ typedef struct _HPET_REGISTERS
     } Timers[];
 } HPET_REGISTERS, *PHPET_REGISTERS;
 
+/* Hardware timer capabilities and CPU clock features */
 typedef struct _TIMER_CAPABILITIES
 {
     BOOLEAN Arat;

sdk/xtdk/amd64/ketypes.h

@@ -497,6 +497,7 @@ typedef struct _KPROCESSOR_CONTROL_BLOCK
     ULONG_PTR MultiThreadProcessorSet;
     SINGLE_LIST_ENTRY DeferredReadyListHead;
     PROCESSOR_POWER_STATE PowerState;
+    ULONG ProfilingCountdown;
 } KPROCESSOR_CONTROL_BLOCK, *PKPROCESSOR_CONTROL_BLOCK;
 
 /* Processor Block structure definition */

sdk/xtdk/amd64/xtstruct.h

@@ -37,6 +37,7 @@ typedef enum _PIC_I8259_ICW1_OPERATING_MODE PIC_I8259_ICW1_OPERATING_MODE, *PPIC
 typedef enum _PIC_I8259_ICW4_BUFFERED_MODE PIC_I8259_ICW4_BUFFERED_MODE, *PPIC_I8259_ICW4_BUFFERED_MODE;
 typedef enum _PIC_I8259_ICW4_EOI_MODE PIC_I8259_ICW4_EOI_MODE, *PPIC_I8259_ICW4_EOI_MODE;
 typedef enum _PIC_I8259_ICW4_SYSTEM_MODE PIC_I8259_ICW4_SYSTEM_MODE, *PPIC_I8259_ICW4_SYSTEM_MODE;
+typedef enum _TIMER_TYPE TIMER_TYPE, *PTIMER_TYPE;
 typedef enum _TRAMPOLINE_TYPE TRAMPOLINE_TYPE, *PTRAMPOLINE_TYPE;
 
 /* Architecture-specific structures forward references */

sdk/xtdk/hltypes.h

@@ -188,14 +188,33 @@
 #define COMPORT_REG_MSR                             0x06 /* Modem Status Register */
 #define COMPORT_REG_SR                              0x07 /* Scratch Register */
 
+/* Standard system clock rates (in 100-nanosecond units)*/
+#define HL_CLOCK_RATE_1000HZ                        10000  /* 1 ms (1000 Hz) - Best Performance */
+#define HL_CLOCK_RATE_500HZ                         20000  /* 2 ms (500 Hz) - High Responsiveness */
+#define HL_CLOCK_RATE_300HZ                         33333  /* 3.33ms (300 Hz) - Multimedia Sync */
+#define HL_CLOCK_RATE_250HZ                         40000  /* 4 ms (250 Hz) - Optimal Balance */
+#define HL_CLOCK_RATE_100HZ                         100000 /* 10 ms (100 Hz) - Power Saving */
+#define HL_CLOCK_RATE_50HZ                          200000 /* 20 ms (50 Hz) - Deep Power Saving */
+
+/* Minimum and maximum system clock rate definitions */
+#define HL_MINIMUM_CLOCK_RATE                       HL_CLOCK_RATE_1000HZ
+#define HL_MAXIMUM_CLOCK_RATE                       HL_CLOCK_RATE_50HZ
+
 /* Minimum and maximum profile intervals */
-#define MIN_PROFILE_INTERVAL 10000
-#define MAX_PROFILE_INTERVAL 10000000
+#define MIN_PROFILE_INTERVAL                        10000
+#define MAX_PROFILE_INTERVAL                        10000000
 
 
 /* C/C++ specific code */
 #ifndef __XTOS_ASSEMBLER__
 
+/* Hardware Layer routine callbacks */
+typedef XTSTATUS (XTAPI *PHALP_INITIALIZE_CLOCK)(VOID);
+typedef ULONGLONG (XTAPI *PHALP_QUERY_PERF_COUNTER)(VOID);
+typedef ULONG (XTAPI *PHALP_QUERY_TIME_DELTA)(VOID);
+typedef ULONG (XTAPI *PHALP_SET_CLOCK_RATE)(IN ULONG Increment);
+typedef VOID (XTAPI *PHALP_STALL_EXECUTION)(IN ULONG MicroSeconds);
+
 /* Generic Address structure */
 typedef struct _GENERIC_ADDRESS
 {
@@ -498,5 +517,15 @@ typedef struct _SMBIOS3_TABLE_HEADER
     ULONGLONG TableAddress;
 } SMBIOS3_TABLE_HEADER, *PSMBIOS3_TABLE_HEADER;
 
+/* Timer dispatch table */
+typedef struct _TIMER_ROUTINES
+{
+    PHALP_INITIALIZE_CLOCK InitializeClock;
+    PHALP_QUERY_PERF_COUNTER QueryPerformanceCounter;
+    PHALP_QUERY_TIME_DELTA QueryTimeDelta;
+    PHALP_SET_CLOCK_RATE SetClockRate;
+    PHALP_STALL_EXECUTION StallExecution;
+} TIMER_ROUTINES, *PTIMER_ROUTINES;
+
 #endif /* __XTOS_ASSEMBLER__ */
 #endif /* __XTDK_HLTYPES_H */

sdk/xtdk/i686/hltypes.h

@@ -315,6 +315,17 @@ typedef enum _PIC_I8259_ICW4_SYSTEM_MODE
     New8086Mode
 } PIC_I8259_ICW4_SYSTEM_MODE, *PPIC_I8259_ICW4_SYSTEM_MODE;
 
+/* Supported hardware timer backends */
+typedef enum _TIMER_TYPE
+{
+    TimerNone,
+    TimerAcpiPm,
+    TimerHpet,
+    TimerLapic,
+    TimerPit,
+    TimerTsc
+} TIMER_TYPE, *PTIMER_TYPE;
+
 /* APIC Base Register */
 typedef union _APIC_BASE_REGISTER
 {
@@ -508,7 +519,7 @@ typedef struct _HPET_REGISTERS
     } Timers[];
 } HPET_REGISTERS, *PHPET_REGISTERS;
 
-/* Timer Capabilities */
+/* Hardware timer capabilities and CPU clock features */
 typedef struct _TIMER_CAPABILITIES
 {
     BOOLEAN Arat;

sdk/xtdk/i686/ketypes.h

@@ -456,6 +456,7 @@ typedef struct _KPROCESSOR_CONTROL_BLOCK
     VOLATILE ULONG_PTR TimerRequest;
     SINGLE_LIST_ENTRY DeferredReadyListHead;
     PROCESSOR_POWER_STATE PowerState;
+    ULONG ProfilingCountdown;
 } KPROCESSOR_CONTROL_BLOCK, *PKPROCESSOR_CONTROL_BLOCK;
 
 /* Processor Block structure definition */

sdk/xtdk/i686/xtstruct.h

@@ -37,6 +37,7 @@ typedef enum _PIC_I8259_ICW1_OPERATING_MODE PIC_I8259_ICW1_OPERATING_MODE, *PPIC
 typedef enum _PIC_I8259_ICW4_BUFFERED_MODE PIC_I8259_ICW4_BUFFERED_MODE, *PPIC_I8259_ICW4_BUFFERED_MODE;
 typedef enum _PIC_I8259_ICW4_EOI_MODE PIC_I8259_ICW4_EOI_MODE, *PPIC_I8259_ICW4_EOI_MODE;
 typedef enum _PIC_I8259_ICW4_SYSTEM_MODE PIC_I8259_ICW4_SYSTEM_MODE, *PPIC_I8259_ICW4_SYSTEM_MODE;
+typedef enum _TIMER_TYPE TIMER_TYPE, *PTIMER_TYPE;
 typedef enum _TRAMPOLINE_TYPE TRAMPOLINE_TYPE, *PTRAMPOLINE_TYPE;
 
 /* Architecture-specific structures forward references */

sdk/xtdk/xtstruct.h

@@ -338,6 +338,7 @@ typedef struct _STRING32 STRING32, *PSTRING32;
 typedef struct _STRING64 STRING64, *PSTRING64;
 typedef struct _THREAD_INFORMATION_BLOCK THREAD_INFORMATION_BLOCK, *PTHREAD_INFORMATION_BLOCK;
 typedef struct _TIME_FIELDS TIME_FIELDS, *PTIME_FIELDS;
+typedef struct _TIMER_ROUTINES TIMER_ROUTINES, *PTIMER_ROUTINES;
 typedef struct _UEFI_FIRMWARE_INFORMATION UEFI_FIRMWARE_INFORMATION, *PUEFI_FIRMWARE_INFORMATION;
 typedef struct _UNICODE_STRING UNICODE_STRING, *PUNICODE_STRING;
 typedef struct _UNICODE_STRING32 UNICODE_STRING32, *PUNICODE_STRING32;
@@ -359,7 +360,6 @@ typedef struct _XTBL_MODULE_AUTHORS XTBL_MODULE_AUTHORS, *PXTBL_MODULE_AUTHORS;
 typedef struct _XTBL_MODULE_DEPS XTBL_MODULE_DEPS, *PXTBL_MODULE_DEPS;
 typedef struct _XTBL_MODULE_INFO XTBL_MODULE_INFO, *PXTBL_MODULE_INFO;
 typedef struct _XTBL_PAGE_MAPPING XTBL_PAGE_MAPPING, *PXTBL_PAGE_MAPPING;
-typedef struct _XTBL_SHELL_COMMAND XTBL_SHELL_COMMAND, *PXTBL_SHELL_COMMAND;
 typedef struct _XTBL_STATUS XTBL_STATUS, *PXTBL_STATUS;
 
 /* Unions forward references */