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ArmPlatformPkg: Changed memory model for the stacks

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In the previous version, every cores had the same stack size.
To avoid to waste memory with secondary core stacks, the primary core stack
size is now different from the secondary cores stack size.

These are the Stack PCDs and their default values:

gArmPlatformTokenSpaceGuid.PcdCPUCoresSecStackBase|0
gArmPlatformTokenSpaceGuid.PcdCPUCoreSecPrimaryStackSize|0x10000
gArmPlatformTokenSpaceGuid.PcdCPUCoreSecSecondaryStackSize|0x1000

gArmPlatformTokenSpaceGuid.PcdCPUCoresSecMonStackBase|0
gArmPlatformTokenSpaceGuid.PcdCPUCoreSecMonStackSize|0x1000

gArmPlatformTokenSpaceGuid.PcdCPUCoresStackBase|0
gArmPlatformTokenSpaceGuid.PcdCPUCorePrimaryStackSize|0x10000
gArmPlatformTokenSpaceGuid.PcdCPUCoreSecondaryStackSize|0x1000




git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12415 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-09-22 23:05:20 +00:00
parent f156d5b49d
commit 2dbcb8f0a3
21 changed files with 451 additions and 213 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
ArmPlatformPkg/Sec/SecEntryPoint.asm
View File

@@ -71,32 +71,57 @@ _WaitForEnabledScu
bl ArmIsScuEnable
tst r1, #1
beq _WaitForEnabledScu
b _SetupStack
b _SetupSecondaryCoreStack
#endif
_InitMem
// Initialize Init Boot Memory
bl ArmPlatformInitializeBootMemory
// Only Primary CPU could run this line (the secondary cores have jumped from _IdentifyCpu to _SetupStack)
mov r5, #0
_SetupStack
// Setup Stack for the 4 CPU cores
//Read Stack Base address from PCD
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r1)
// Read Stack size from PCD
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecStackSize), r2)
// Calcuate Stack Pointer reg value using Stack size and CPU ID.
mov r3,r5 // r3 = core_id
mul r3,r3,r2 // r3 = core_id * stack_size = offset from the stack base
add r3,r3,r1 // r3 = stack_base + offset
mov sp, r3
// Only Primary CPU could run this line (the secondary cores have jumped from _IdentifyCpu to _SetupStack)
LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r5)
_SetupPrimaryCoreStack
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r2)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecPrimaryStackSize), r3)
// Calculate the Top of the Stack
add r2, r2, r3
LoadConstantToReg (FixedPcdGet32(PcdSecGlobalVariableSize), r3)
// The reserved space for global variable must be 8-bytes aligned for pushing
// 64-bit variable on the stack
SetPrimaryStack (r2, r3, r1)
// Set all the SEC global variables to 0
mov r3, sp
mov r1, #0x0
_InitGlobals
str r1, [r3], #4
cmp r3, r2
blt _InitGlobals
b _PrepareArguments
_SetupSecondaryCoreStack
// Get the Core Position (ClusterId * 4) + CoreId
GetCorePositionInStack(r0, r5, r1)
// The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack
add r0, r0, #1
// Get the base of the stack for the secondary cores
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r1)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecSecondaryStackSize), r2)
add r1, r1, r2
// StackOffset = CorePos * StackSize
mul r0, r0, r2
// SP = StackBase + StackOffset
add sp, r1, r0
_PrepareArguments
// Move sec startup address into a data register
// ensure we're jumping to FV version of the code (not boot remapped alias)
// Ensure we're jumping to FV version of the code (not boot remapped alias)
ldr r3, StartupAddr
// Jump to SEC C code
@@ -104,4 +129,6 @@ _SetupStack
mov r0, r5
blx r3
_NeverReturn
b _NeverReturn
END