DEBUG builds of PEI code will print a diagnostic message regarding
the utilization of temporary RAM before switching to permanent RAM.
For example,
Total temporary memory: 16352 bytes.
temporary memory stack ever used: 4820 bytes.
temporary memory heap used for HobList: 4720 bytes.
Tracking stack utilization like this requires the stack to be seeded
with a known magic value, and this needs to occur before entering C
code, given that it uses the stack. Currently, only Nt32Pkg appears
to implement this feature, but it is useful nonetheless, so let's
wire it up for PrePeiCore.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <[email protected]>
---
ArmPlatformPkg/PrePeiCore/AArch64/PrePeiCoreEntryPoint.S | 7 +++++++
ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S | 10 ++++++++++
ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm | 10 ++++++++++
3 files changed, 27 insertions(+)
diff --git a/ArmPlatformPkg/PrePeiCore/AArch64/PrePeiCoreEntryPoint.S
b/ArmPlatformPkg/PrePeiCore/AArch64/PrePeiCoreEntryPoint.S
index aab5edab0c42..7a33e2754869 100644
--- a/ArmPlatformPkg/PrePeiCore/AArch64/PrePeiCoreEntryPoint.S
+++ b/ArmPlatformPkg/PrePeiCore/AArch64/PrePeiCoreEntryPoint.S
@@ -13,6 +13,8 @@
#include <AsmMacroIoLibV8.h>
+#define INIT_CAR_VALUE 0x5AA55AA55AA55AA5
+
ASM_FUNC(_ModuleEntryPoint)
// Do early platform specific actions
bl ASM_PFX(ArmPlatformPeiBootAction)
@@ -84,4 +86,9 @@ _PrepareArguments:
_SetupPrimaryCoreStack:
mov sp, x1
+ MOV64 (x8, FixedPcdGet64(PcdCPUCoresStackBase))
+ MOV64 (x9, INIT_CAR_VALUE)
+0:stp x9, x9, [x8], #16
+ cmp x8, x1
+ b.lt 0b
b _PrepareArguments
diff --git a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
index 14344425ad4c..7342e49bea59 100644
--- a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
+++ b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.S
@@ -13,6 +13,8 @@
#include <AsmMacroIoLib.h>
+#define INIT_CAR_VALUE 0x5AA55AA5
+
ASM_FUNC(_ModuleEntryPoint)
// Do early platform specific actions
bl ASM_PFX(ArmPlatformPeiBootAction)
@@ -65,6 +67,14 @@ _PrepareArguments:
_SetupPrimaryCoreStack:
mov sp, r1
+ MOV32 (r8, FixedPcdGet64(PcdCPUCoresStackBase))
+ MOV32 (r9, INIT_CAR_VALUE)
+ mov r10, r9
+ mov r11, r9
+ mov r12, r9
+0:stm r8!, {r9-r12}
+ cmp r8, r1
+ blt 0b
b _PrepareArguments
_NeverReturn:
diff --git a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
index abea675828df..7455de8aa66e 100644
--- a/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
+++ b/ArmPlatformPkg/PrePeiCore/Arm/PrePeiCoreEntryPoint.asm
@@ -13,6 +13,8 @@
#include <AutoGen.h>
+#define INIT_CAR_VALUE 0x5AA55AA5
+
INCLUDE AsmMacroIoLib.inc
IMPORT CEntryPoint
@@ -79,6 +81,14 @@ _PrepareArguments
_SetupPrimaryCoreStack
mov sp, r1
+ mov32 r8, FixedPcdGet64(PcdCPUCoresStackBase)
+ mov32 r9, INIT_CAR_VALUE
+ mov r10, r9
+ mov r11, r9
+ mov r12, r9
+0:stm r8!, {r9-r12}
+ cmp r8, r1
+ blt 0b
b _PrepareArguments
_NeverReturn
--
2.11.0
_______________________________________________
edk2-devel mailing list
[email protected]
https://lists.01.org/mailman/listinfo/edk2-devel
