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2ef2b01e A |
1 | //------------------------------------------------------------------------------ \r |
2 | //\r | |
3 | // Copyright (c) 2008-2009 Apple Inc. All rights reserved.\r | |
4 | //\r | |
5 | // All rights reserved. This program and the accompanying materials\r | |
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 | #include <AutoGen.h>\r | |
18 | INCLUDE AsmMacroIoLib.inc\r | |
19 | \r | |
20 | IMPORT CEntryPoint\r | |
21 | EXPORT _ModuleEntryPoint\r | |
22 | \r | |
23 | PRESERVE8\r | |
24 | AREA ModuleEntryPoint, CODE, READONLY\r | |
25 | \r | |
26 | \r | |
27 | _ModuleEntryPoint\r | |
28 | \r | |
29 | //Disable L2 cache\r | |
30 | mrc p15, 0, r0, c1, c0, 1 // read Auxiliary Control Register\r | |
31 | bic r0, r0, #0x00000002 // disable L2 cache\r | |
32 | mcr p15, 0, r0, c1, c0, 1 // store Auxiliary Control Register\r | |
33 | \r | |
34 | //Enable Strict alignment checking & Instruction cache\r | |
35 | mrc p15, 0, r0, c1, c0, 0\r | |
36 | bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */\r | |
37 | bic r0, r0, #0x00000005 /* clear bits 0, 2 (---- -C-M) */\r | |
38 | orr r0, r0, #0x00000002 /* set bit 1 (A) Align */\r | |
39 | orr r0, r0, #0x00001000 /* set bit 12 (I) enable I-Cache */\r | |
40 | mcr p15, 0, r0, c1, c0, 0\r | |
41 | \r | |
42 | // Set CPU vectors to start of DRAM\r | |
43 | mov r0, #0x80000000\r | |
44 | mcr p15, 0, r0, c12, c0, 0\r | |
45 | /* before we call C code, lets setup the stack pointer in internal RAM*/\r | |
46 | stack_pointer_setup\r | |
47 | \r | |
48 | //\r | |
49 | // Set stack based on PCD values. Need to do it this way to make C code work \r | |
50 | // when it runs from FLASH. \r | |
51 | // \r | |
52 | LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r2) /* stack base arg2 */\r | |
53 | LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3) /* stack size arg3 */\r | |
54 | add r4, r2, r3\r | |
55 | \r | |
2ef2b01e A |
56 | //Enter SVC mode and set up SVC stack pointer\r |
57 | mov r0,#0x13|0x80|0x40\r | |
58 | msr CPSR_c,r0\r | |
2ef2b01e A |
59 | mov r13,r4\r |
60 | \r | |
61 | // Call C entry point\r | |
62 | mov r0, #0x80000000 /* memory base arg0 */\r | |
6f72e28d | 63 | mov r1, #0x10000000 /* memory size arg1 */\r |
2ef2b01e A |
64 | blx CEntryPoint /* Assume C code is thumb */\r |
65 | \r | |
66 | ShouldNeverGetHere\r | |
67 | /* _CEntryPoint should never return */\r | |
68 | b ShouldNeverGetHere\r | |
69 | \r | |
70 | END\r | |
71 | \r |