| 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 |
| 22 | #global symbols referenced by this module\r |
| 23 | GCC_ASM_IMPORT(CEntryPoint)\r |
| 24 | \r |
| 25 | StartupAddr: .word CEntryPoint\r |
| 26 | \r |
| 27 | #make _ModuleEntryPoint as global\r |
| 28 | GCC_ASM_EXPORT(_ModuleEntryPoint)\r |
| 29 | \r |
| 30 | \r |
| 31 | ASM_PFX(_ModuleEntryPoint):\r |
| 32 | # Identify CPU ID\r |
| 33 | mrc p15, 0, r0, c0, c0, 5\r |
| 34 | and r0, #0xf\r |
| 35 | \r |
| 36 | _SetupStack:\r |
| 37 | # Setup Stack for the 4 CPU cores\r |
| 38 | LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackBase), r1)\r |
| 39 | LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackSize), r2)\r |
| 40 | \r |
| 41 | mov r3,r0 @ r3 = core_id\r |
| 42 | mul r3,r3,r2 @ r3 = core_id * stack_size = offset from the stack base\r |
| 43 | add r3,r3,r1 @ r3 = stack_base + offset\r |
| 44 | add r3,r3,r2,LSR #1 @ r3 = stack_offset + (stack_size/2) <-- the top half is for the heap\r |
| 45 | mov sp, r3\r |
| 46 | \r |
| 47 | # Only allocate memory in top of the primary core stack\r |
| 48 | cmp r0, #0\r |
| 49 | bne _PrepareArguments\r |
| 50 | \r |
| 51 | _AllocateGlobalPeiVariables:\r |
| 52 | # Reserve top of the stack for Global PEI Variables (eg: PeiServicesTablePointer)\r |
| 53 | LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r1)\r |
| 54 | sub sp, sp, r1\r |
| 55 | \r |
| 56 | _PrepareArguments:\r |
| 57 | # The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector\r |
| 58 | LoadConstantToReg (FixedPcdGet32(PcdNormalFvBaseAddress), r2)\r |
| 59 | add r2, r2, #4\r |
| 60 | ldr r1, [r2]\r |
| 61 | \r |
| 62 | # move sec startup address into a data register\r |
| 63 | # ensure we're jumping to FV version of the code (not boot remapped alias)\r |
| 64 | ldr r2, StartupAddr\r |
| 65 | \r |
| 66 | # jump to PrePeiCore C code\r |
| 67 | # r0 = core_id\r |
| 68 | # r1 = pei_core_address\r |
| 69 | blx r2\r |
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