AcpiExecSMPFunction: Difference between revisions

Revision as of 02:33, 9 April 2019

Execute a subprogram on all CPUs simultaneously.

ACPI_STATUS  AcpiExecSMPFunction (ACPIRUNATALLCPU SubProgram, UINT32 CPUMask, UINT32 Flags, void *Context)

SubProgram: Address subprogram, which called in each CPU according with CPUMask, must declare as ACPI_STATUS APIENTRY SubProgram(void *Context)

CPUMask: CPUs for execute, low word is bit field, where bit number is number of CPU for execute, 0xffffffff mean "all CPU"

Flags

Flag, can be:

SMPEXEC_IPITIME: run from IPI (interrupt time) , stack is NOT OS/2 stack
SMPEXEC_TASKTIME: run from PSD_SET_PROC_STATE, PSD stack, kernel time
SMPEXEC_WBINDVD: Flush cache at all CPU, parameter SubProgram ignore with this.
SMPEXEC_SYNC: synchronize CPU before run (now tested with SMPEXEC_TASKTIME )

Note: In Uni kernel call imeditialy w/o any checking CPU number. Running in kernel time.

@@ Line 16: / Line 16: @@
 ; Note: In Uni kernel call imeditialy w/o any checking CPU number. Running in kernel time.
-==Example==
-    PACPIFUNCTION ACPIcall = NULL;
-    ACPIcall = (PACPIFUNCTION)InitACPICall("MyDriver");
-    if (ACPIcall)
-    {
-        ACPIcall->AcpiOsPrintf("Mydriver is good addr:%x\n",ACPIcall);
-    }