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11c20f4e | 1 | //\r |
2 | // Copyright (c) 2011, ARM Limited. All rights reserved.\r | |
3 | // \r | |
4 | // This program and the accompanying materials \r | |
5 | // are licensed and made available under the terms and conditions of the BSD License \r | |
6 | // which accompanies this distribution. The full text of the license may be found at \r | |
7 | // http://opensource.org/licenses/bsd-license.php \r | |
8 | //\r | |
9 | // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | //\r | |
12 | //\r | |
13 | \r | |
14 | #include <AsmMacroIoLib.h>\r | |
15 | #include <Base.h>\r | |
16 | #include <Library/PcdLib.h>\r | |
17 | #include <AutoGen.h>\r | |
18 | \r | |
19 | .text\r | |
20 | .align 3\r | |
21 | \r | |
11c20f4e | 22 | GCC_ASM_IMPORT(CEntryPoint)\r |
0787bc61 | 23 | GCC_ASM_IMPORT(ArmReadMpidr)\r |
11c20f4e | 24 | GCC_ASM_EXPORT(_ModuleEntryPoint)\r |
25 | \r | |
0787bc61 | 26 | StartupAddr: .word CEntryPoint\r |
11c20f4e | 27 | \r |
28 | ASM_PFX(_ModuleEntryPoint):\r | |
29 | # Identify CPU ID\r | |
0787bc61 | 30 | bl ASM_PFX(ArmReadMpidr)\r |
31 | // Get ID of this CPU in Multicore system\r | |
32 | LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)\r | |
33 | and r0, r0, r1\r | |
11c20f4e | 34 | \r |
35 | _SetupStack:\r | |
36 | # Setup Stack for the 4 CPU cores\r | |
37 | LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackBase), r1)\r | |
38 | LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackSize), r2)\r | |
39 | \r | |
40 | mov r3,r0 @ r3 = core_id\r | |
41 | mul r3,r3,r2 @ r3 = core_id * stack_size = offset from the stack base\r | |
42 | add r3,r3,r1 @ r3 = stack_base + offset\r | |
43 | add r3,r3,r2,LSR #1 @ r3 = stack_offset + (stack_size/2) <-- the top half is for the heap\r | |
44 | mov sp, r3\r | |
45 | \r | |
46 | # Only allocate memory in top of the primary core stack\r | |
47 | cmp r0, #0\r | |
48 | bne _PrepareArguments\r | |
49 | \r | |
50 | _AllocateGlobalPeiVariables:\r | |
51 | # Reserve top of the stack for Global PEI Variables (eg: PeiServicesTablePointer)\r | |
52 | LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r1)\r | |
53 | sub sp, sp, r1\r | |
54 | \r | |
55 | _PrepareArguments:\r | |
56 | # The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector\r | |
57 | LoadConstantToReg (FixedPcdGet32(PcdNormalFvBaseAddress), r2)\r | |
58 | add r2, r2, #4\r | |
59 | ldr r1, [r2]\r | |
60 | \r | |
61 | # move sec startup address into a data register\r | |
62 | # ensure we're jumping to FV version of the code (not boot remapped alias)\r | |
63 | ldr r2, StartupAddr\r | |
64 | \r | |
65 | # jump to PrePeiCore C code\r | |
66 | # r0 = core_id\r | |
67 | # r1 = pei_core_address\r | |
68 | blx r2\r |