1fde2f61 |
1 | #------------------------------------------------------------------------------ \r |
2 | #\r |
cf748a1a |
3 | # Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
1fde2f61 |
4 | #\r |
cf748a1a |
5 | # This program and the accompanying materials\r |
1fde2f61 |
6 | # are licensed and made available under the terms and conditions of the BSD License\r |
7 | # which accompanies this distribution. The full text of the license may be found at\r |
8 | # http://opensource.org/licenses/bsd-license.php\r |
9 | #\r |
10 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
12 | #\r |
13 | #------------------------------------------------------------------------------\r |
14 | \r |
15 | #include <AsmMacroIoLib.h>\r |
16 | #include <Library/PcdLib.h>\r |
17 | \r |
18 | .text\r |
19 | .align 3\r |
20 | \r |
21 | .globl ASM_PFX(CEntryPoint)\r |
22 | .globl ASM_PFX(_ModuleEntryPoint)\r |
23 | \r |
24 | ASM_PFX(_ModuleEntryPoint):\r |
25 | \r |
26 | //\r |
27 | // Set stack based on PCD values. Need to do it this way to make C code work \r |
28 | // when it runs from FLASH. \r |
29 | // \r |
30 | LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r2) /* stack base arg2 */\r |
31 | LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3) /* stack size arg3 */\r |
32 | add r4, r2, r3\r |
33 | \r |
34 | //Enter SVC mode and set up SVC stack pointer\r |
35 | mov r0,#0x13|0x80|0x40\r |
36 | msr CPSR_c,r0\r |
37 | sub r4, r4, #0x400\r |
38 | mov r13,r4\r |
39 | \r |
40 | // Call C entry point\r |
41 | LoadConstantToReg (FixedPcdGet32(PcdMemorySize) ,r1) /* memory size arg1 */\r |
42 | LoadConstantToReg (FixedPcdGet32(PcdMemoryBase) ,r0) /* memory size arg0 */\r |
43 | \r |
44 | blx ASM_PFX(CEntryPoint) /* Assume C code is ARM */\r |
45 | \r |
46 | ShouldNeverGetHere:\r |
47 | /* _CEntryPoint should never return */\r |
48 | b ShouldNeverGetHere\r |
49 | \r |
50 | \r |