All APs use the same common stack to initialization. after
initialization, APs should switch to the stack of its own.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.f...@cn.fujitsu.com>
---
UefiCpuPkg/CpuDxe/CpuMp.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c
index bfd0d8d..a87d67f 100644
--- a/UefiCpuPkg/CpuDxe/CpuMp.c
+++ b/UefiCpuPkg/CpuDxe/CpuMp.c
@@ -25,6 +25,28 @@ VOID *mApStackStart = 0;
volatile UINTN mNumberOfProcessors;
/**
+ Application Processors do loop routine
+ after switch to its own stack.
+
+ @param Context1 A pointer to the context to pass into the function.
+ @param Context2 A pointer to the context to pass into the function.
+
+**/
+VOID
+ProcessorToIdleState (
+ IN VOID *Context1, OPTIONAL
+ IN VOID *Context2 OPTIONAL
+ )
+{
+ DEBUG ((DEBUG_INFO, "Ap apicid is %d\n", GetApicId ()));
+
+ AsmApDoneWithCommonStack ();
+
+ CpuSleep ();
+ CpuDeadLoop ();
+}
+
+/**
Application Processor C code entry point.
**/
@@ -35,6 +57,13 @@ ApEntryPointInC (
)
{
mNumberOfProcessors++;
+ mApStackStart = (UINT8*)mApStackStart + gApStackSize;
+
+ SwitchStack (
+ (SWITCH_STACK_ENTRY_POINT)(UINTN)ProcessorToIdleState,
+ NULL,
+ NULL,
+ mApStackStart);
}
--
1.9.3
------------------------------------------------------------------------------
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