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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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13
ArmPlatformPkg/Sec/Sec.c
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@@ -54,7 +54,8 @@ CEntryPoint (
// Primary CPU clears out the SCU tag RAMs, secondaries wait
if (IS_PRIMARY_CORE(MpId)) {
if (ArmIsMpCore()) {
ArmCpuSynchronizeSignal (ARM_CPU_EVENT_BOOT_MEM_INIT);
// Signal for the initial memory is configured (event: BOOT_MEM_INIT)
ArmCallSEV ();
}
// SEC phase needs to run library constructors by hand. This assumes we are linked against the SerialLib
@@ -159,18 +160,18 @@ TrustedWorldInitialization (
// Setup the Trustzone Chipsets
if (IS_PRIMARY_CORE(MpId)) {
if (ArmIsMpCore()) {
// Waiting for the Primary Core to have finished to initialize the Secure World
ArmCpuSynchronizeSignal (ARM_CPU_EVENT_SECURE_INIT);
// Signal the secondary core the Security settings is done (event: EVENT_SECURE_INIT)
ArmCallSEV ();
}
} else {
// The secondary cores need to wait until the Trustzone chipsets configuration is done
// before switching to Non Secure World
// Waiting for the Primary Core to have finished to initialize the Secure World
ArmCpuSynchronizeWait (ARM_CPU_EVENT_SECURE_INIT);
// Wait for the Primary Core to finish the initialization of the Secure World (event: EVENT_SECURE_INIT)
ArmCallWFE ();
}
// Call the Platform specific fucntion to execute additional actions if required
// Call the Platform specific function to execute additional actions if required
JumpAddress = PcdGet32 (PcdFvBaseAddress);
ArmPlatformSecExtraAction (MpId, &JumpAddress);