X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=ArmRealViewEbPkg%2FSecForPei%2FArm%2FModuleEntryPoint.S;fp=ArmRealViewEbPkg%2FSecForPei%2FArm%2FModuleEntryPoint.S;h=f87aa58037aa0fc0b9df96fb6a28056649b72735;hp=0000000000000000000000000000000000000000;hb=afdfe8f02bdf8d563554bb620c001072862b064e;hpb=7ee525b2c1f8d3d6da5f788364fe5be36a979c9c diff --git a/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S b/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S new file mode 100755 index 0000000000..f87aa58037 --- /dev/null +++ b/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S @@ -0,0 +1,79 @@ +#------------------------------------------------------------------------------ +# +# ARM EB Entry point. Reset vector in FV header will brach to +# _ModuleEntryPoint. +# +# We use crazy macros, like LoadConstantToReg, since Xcode assembler +# does not support = assembly syntax for ldr. +# +# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
+# +# This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# +#------------------------------------------------------------------------------ + +#include +#include +#include +#include + +.text +.align 3 + +.globl ASM_PFX(CEntryPoint) +.globl ASM_PFX(_ModuleEntryPoint) +.globl ASM_PFX(StartupAddr) + +ASM_PFX(_ModuleEntryPoint): + + // Turn off remapping NOR to 0. We can now use DRAM in low memory + // CAN'T DO THIS HERE -- BRANCH FROM RESET VECTOR IS RELATIVE AND REMAINS IN REMAPPED NOR + //MmioOr32 (0x10001000 ,BIT8) //EB_SP810_CTRL_BASE + + // Enable NEON register in case folks want to use them for optimizations (CopyMem) + mrc p15, 0, r0, c1, c0, 2 + orr r0, r0, #0x00f00000 // Enable VFP access (V* instructions) + mcr p15, 0, r0, c1, c0, 2 + mov r0, #0x40000000 // Set EN bit in FPEXC + mcr p10,#0x7,r0,c8,c0,#0 // msr FPEXC,r0 in ARM assembly + + // Set CPU vectors to 0 (which is currently flash) + LoadConstantToReg (FixedPcdGet32(PcdCpuVectorBaseAddress) ,r0) // Get vector base + mcr p15, 0, r0, c12, c0, 0 + isb // Sync changes to control registers + + // + // Set stack based on PCD values. Need to do it this way to make C code work + // when it runs from FLASH. + // + LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r0) // temp ram base arg 0 TODO: change "stackbase" to "temprambase" + LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r1) // temp ram size arg 1 + lsr r3, r1, #1 // r4 = size of temp mem / 2 + add r3, r3, r0 // r2 = temp ram base + r4 + mov r13, r3 // result: stack pointer = temp ram base + (size of temp mem / 2) + + // lr points to area in reset vector block containing PEI core address + ldr r2, [lr] // pei core arg 3 + + // move sec startup address into a data register + // ensure we're jumping to FV version of the code (not boot remapped alias) +#ifndef __APPLE__ +// This does not generate a valid relocation for Xcode. Fix me... + ldr r4, ASM_PFX(StartupAddr) + + // jump to SEC C code + blx r4 +#endif + + +ASM_PFX(ShouldNeverGetHere): + // _CEntryPoint should never return + b ASM_PFX(ShouldNeverGetHere) + +