Started working on an ArmEb package. GIC is ported. SEC is a start. Still missing...

[mirror_edk2.git] / ArmEbPkg / Sec / ModuleEntryPoint.S

diff --git a/ArmEbPkg/Sec/ModuleEntryPoint.S b/ArmEbPkg/Sec/ModuleEntryPoint.S
new file mode 100755 (executable)
index 0000000..aaa9482
--- /dev/null
+++ b/ArmEbPkg/Sec/ModuleEntryPoint.S
@@ -0,0 +1,50 @@
+#------------------------------------------------------------------------------ \r
+#\r
+# Copyright (c) 2008-2009 Apple Inc. All rights reserved.\r
+#\r
+# All rights reserved. This program and the accompanying materials\r
+# are licensed and made available under the terms and conditions of the BSD License\r
+# which accompanies this distribution.  The full text of the license may be found at\r
+# http://opensource.org/licenses/bsd-license.php\r
+#\r
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+#include <AsmMacroIoLib.h>\r
+#include <Library/PcdLib.h>\r
+\r
+.text\r
+.align 3\r
+\r
+.globl ASM_PFX(CEntryPoint)\r
+.globl ASM_PFX(_ModuleEntryPoint)\r
+\r
+ASM_PFX(_ModuleEntryPoint):\r
+\r
+  //\r
+  // Set stack based on PCD values. Need to do it this way to make C code work \r
+  // when it runs from FLASH. \r
+  //  \r
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r2)    /* stack base arg2  */\r
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3)    /* stack size arg3  */\r
+  add     r4, r2, r3\r
+\r
+  //Enter SVC mode and set up SVC stack pointer\r
+  mov     r0,#0x13|0x80|0x40\r
+  msr     CPSR_c,r0\r
+  sub     r4, r4, #0x400\r
+  mov     r13,r4\r
+\r
+  // Call C entry point\r
+  LoadConstantToReg (FixedPcdGet32(PcdMemorySize) ,r1)    /* memory size arg1          */\r
+  LoadConstantToReg (FixedPcdGet32(PcdMemoryBase) ,r0)    /* memory size arg0         */\r
+\r
+  blx      ASM_PFX(CEntryPoint) /* Assume C code is ARM      */\r
+\r
+ShouldNeverGetHere:\r
+  /* _CEntryPoint should never return */\r
+  b       ShouldNeverGetHere\r
+\r
+  \r