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
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+++ b/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S
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+#------------------------------------------------------------------------------
+#
+# 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)
+
+