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ArmPkg/ArmCpuLib: Replaced complex functions ArmCpuSynchronizeWait & ArmCpuSynchronizeSignal by sev & wfe

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Previsouly the synchronization of MpCore was using the SGI (Software
Generated Interrupt) to synchronize MpCore during the early boot.
This commit replaced this mechanism by the more appropriate SEV/WFE
instructions (Send/Wait Event instructions).
That also eases the port to a new cpu/platform.

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13249 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2012-05-02 19:55:32 +00:00
parent f463bb00ad
commit b1d41be7c9
19 changed files with 61 additions and 274 deletions
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6
ArmPlatformPkg/Sec/SecEntryPoint.S
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@@ -26,7 +26,7 @@ GCC_ASM_IMPORT(ArmDisableCachesAndMmu)
GCC_ASM_IMPORT(ArmWriteVBar)
GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_IMPORT(SecVectorTable)
GCC_ASM_IMPORT(ArmCpuSynchronizeWait)
GCC_ASM_IMPORT(ArmCallWFE)
GCC_ASM_EXPORT(_ModuleEntryPoint)
StartupAddr: .word ASM_PFX(CEntryPoint)
@@ -59,8 +59,8 @@ _IdentifyCpu:
beq _InitMem
_WaitInitMem:
mov r0, #ARM_CPU_EVENT_BOOT_MEM_INIT
bl ASM_PFX(ArmCpuSynchronizeWait)
// Wait for the primary core to initialize the initial memory (event: BOOT_MEM_INIT)
bl ASM_PFX(ArmCallWFE)
// Now the Init Mem is initialized, we setup the secondary core stacks
b _SetupSecondaryCoreStack