ArmPlatformPkg/PrePi: switch to ASM_FUNC() asm macro
Annotate functions with ASM_FUNC() so that they are emitted into
separate sections.
While we're at it, replace some inefficient uses of LoadConstantToReg()
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
diff --git a/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
index 9538c70..d0530a8 100644
--- a/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
+++ b/ArmPlatformPkg/PrePi/AArch64/ModuleEntryPoint.S
@@ -12,24 +12,10 @@
//
#include <AsmMacroIoLibV8.h>
-#include <Base.h>
-#include <Library/PcdLib.h>
-#include <AutoGen.h>
-.text
-.align 3
-
-GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
-GCC_ASM_IMPORT(ArmReadMpidr)
-GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
-GCC_ASM_IMPORT(ArmPlatformStackSet)
-GCC_ASM_EXPORT(_ModuleEntryPoint)
ASM_GLOBAL ASM_PFX(mSystemMemoryEnd)
-StartupAddr: .8byte ASM_PFX(CEntryPoint)
-ASM_PFX(mSystemMemoryEnd): .8byte 0
-
-ASM_PFX(_ModuleEntryPoint):
+ASM_FUNC(_ModuleEntryPoint)
// Do early platform specific actions
bl ASM_PFX(ArmPlatformPeiBootAction)
@@ -49,10 +35,8 @@
cmp x1, #0
bne _SetupStackPosition
- LoadConstantToReg (FixedPcdGet64(PcdSystemMemoryBase), x1)
- LoadConstantToReg (FixedPcdGet64(PcdSystemMemorySize), x2)
- sub x2, x2, #1
- add x1, x1, x2
+ MOV64 (x1, FixedPcdGet64(PcdSystemMemoryBase) + FixedPcdGet64(PcdSystemMemorySize) - 1)
+
// Update the global variable
adr x2, mSystemMemoryEnd
str x1, [x2]
@@ -61,13 +45,13 @@
// r1 = SystemMemoryTop
// Calculate Top of the Firmware Device
- LoadConstantToReg (FixedPcdGet64(PcdFdBaseAddress), x2)
- LoadConstantToReg (FixedPcdGet32(PcdFdSize), x3)
+ MOV64 (x2, FixedPcdGet64(PcdFdBaseAddress))
+ MOV32 (x3, FixedPcdGet32(PcdFdSize) - 1)
sub x3, x3, #1
add x3, x3, x2 // x3 = FdTop = PcdFdBaseAddress + PcdFdSize
// UEFI Memory Size (stacks are allocated in this region)
- LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryUefiRegionSize), x4)
+ MOV32 (x4, FixedPcdGet32(PcdSystemMemoryUefiRegionSize))
//
// Reserve the memory for the UEFI region (contain stacks on its top)
@@ -98,9 +82,7 @@
_SetupOverflowStack:
// Case memory at the top of the address space. Ensure the top of the stack is EFI_PAGE_SIZE
// aligned (4KB)
- LoadConstantToReg (EFI_PAGE_MASK, x11)
- and x11, x11, x1
- sub x1, x1, x11
+ and x1, x1, ~EFI_PAGE_MASK
_GetBaseUefiMemory:
// Calculate the Base of the UEFI Memory
@@ -109,22 +91,19 @@
_GetStackBase:
// r1 = The top of the Mpcore Stacks
// Stack for the primary core = PrimaryCoreStack
- LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), x2)
+ MOV32 (x2, FixedPcdGet32(PcdCPUCorePrimaryStackSize))
sub x12, x1, x2
// Stack for the secondary core = Number of Cores - 1
- LoadConstantToReg (FixedPcdGet32(PcdCoreCount), x0)
- sub x0, x0, #1
- LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), x1)
- mul x1, x1, x0
+ MOV32 (x1, (FixedPcdGet32(PcdCoreCount) - 1) * FixedPcdGet32(PcdCPUCoreSecondaryStackSize))
sub x12, x12, x1
// x12 = The base of the MpCore Stacks (primary stack & secondary stacks)
mov x0, x12
mov x1, x10
//ArmPlatformStackSet(StackBase, MpId, PrimaryStackSize, SecondaryStackSize)
- LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), x2)
- LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), x3)
+ MOV32 (x2, FixedPcdGet32(PcdCPUCorePrimaryStackSize))
+ MOV32 (x3, FixedPcdGet32(PcdCPUCoreSecondaryStackSize))
bl ASM_PFX(ArmPlatformStackSet)
// Is it the Primary Core ?
@@ -140,7 +119,7 @@
// Move sec startup address into a data register
// Ensure we're jumping to FV version of the code (not boot remapped alias)
- ldr x4, StartupAddr
+ ldr x4, =ASM_PFX(CEntryPoint)
// Jump to PrePiCore C code
// x0 = MpId
@@ -150,3 +129,5 @@
_NeverReturn:
b _NeverReturn
+
+ASM_PFX(mSystemMemoryEnd): .8byte 0
diff --git a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
index 1311efc..b7127ce 100644
--- a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
+++ b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.S
@@ -12,28 +12,12 @@
//
#include <AsmMacroIoLib.h>
-#include <Base.h>
-#include <Library/PcdLib.h>
-#include <AutoGen.h>
#include <Chipset/ArmV7.h>
-.text
-.align 3
-
-GCC_ASM_IMPORT(CEntryPoint)
-GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
-GCC_ASM_IMPORT(ArmReadMpidr)
-GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
-GCC_ASM_IMPORT(ArmPlatformStackSet)
-GCC_ASM_EXPORT(_ModuleEntryPoint)
GCC_ASM_EXPORT(mSystemMemoryEnd)
-StartupAddr: .word CEntryPoint
-mSystemMemoryEnd: .8byte 0
-
-
-ASM_PFX(_ModuleEntryPoint):
+ASM_FUNC(_ModuleEntryPoint)
// Do early platform specific actions
bl ASM_PFX(ArmPlatformPeiBootAction)
@@ -57,10 +41,8 @@
cmp r1, #0
bne _SetupStackPosition
- LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryBase), r1)
- LoadConstantToReg (FixedPcdGet32(PcdSystemMemorySize), r2)
- sub r2, r2, #1
- add r1, r1, r2
+ MOV32 (r1, FixedPcdGet32(PcdSystemMemoryBase) + FixedPcdGet32(PcdSystemMemorySize) - 1)
+
// Update the global variable
adr r2, mSystemMemoryEnd
str r1, [r2]
@@ -69,13 +51,12 @@
// r1 = SystemMemoryTop
// Calculate Top of the Firmware Device
- LoadConstantToReg (FixedPcdGet32(PcdFdBaseAddress), r2)
- LoadConstantToReg (FixedPcdGet32(PcdFdSize), r3)
- sub r3, r3, #1
+ MOV32 (r2, FixedPcdGet32(PcdFdBaseAddress))
+ MOV32 (r3, FixedPcdGet32(PcdFdSize) - 1)
add r3, r3, r2 // r3 = FdTop = PcdFdBaseAddress + PcdFdSize
// UEFI Memory Size (stacks are allocated in this region)
- LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryUefiRegionSize), r4)
+ MOV32 (r4, FixedPcdGet32(PcdSystemMemoryUefiRegionSize))
//
// Reserve the memory for the UEFI region (contain stacks on its top)
@@ -106,9 +87,8 @@
_SetupOverflowStack:
// Case memory at the top of the address space. Ensure the top of the stack is EFI_PAGE_SIZE
// aligned (4KB)
- LoadConstantToReg (EFI_PAGE_MASK, r9)
- and r9, r9, r1
- sub r1, r1, r9
+ MOV32 (r9, ~EFI_PAGE_MASK & 0xFFFFFFFF)
+ and r1, r1, r9
_GetBaseUefiMemory:
// Calculate the Base of the UEFI Memory
@@ -117,22 +97,19 @@
_GetStackBase:
// r1 = The top of the Mpcore Stacks
// Stack for the primary core = PrimaryCoreStack
- LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
+ MOV32 (r2, FixedPcdGet32(PcdCPUCorePrimaryStackSize))
sub r10, r1, r2
// Stack for the secondary core = Number of Cores - 1
- LoadConstantToReg (FixedPcdGet32(PcdCoreCount), r0)
- sub r0, r0, #1
- LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r1)
- mul r1, r1, r0
+ MOV32 (r0, (FixedPcdGet32(PcdCoreCount) - 1) * FixedPcdGet32(PcdCPUCoreSecondaryStackSize))
sub r10, r10, r1
// r10 = The base of the MpCore Stacks (primary stack & secondary stacks)
mov r0, r10
mov r1, r8
//ArmPlatformStackSet(StackBase, MpId, PrimaryStackSize, SecondaryStackSize)
- LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
- LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r3)
+ MOV32 (r2, FixedPcdGet32(PcdCPUCorePrimaryStackSize))
+ MOV32 (r3, FixedPcdGet32(PcdCPUCoreSecondaryStackSize))
bl ASM_PFX(ArmPlatformStackSet)
// Is it the Primary Core ?
@@ -149,7 +126,7 @@
// Move sec startup address into a data register
// Ensure we're jumping to FV version of the code (not boot remapped alias)
- ldr r4, StartupAddr
+ ldr r4, =ASM_PFX(CEntryPoint)
// Jump to PrePiCore C code
// r0 = MpId
@@ -160,3 +137,4 @@
_NeverReturn:
b _NeverReturn
+ASM_PFX(mSystemMemoryEnd): .8byte 0
