1 // 2 // Copyright (c) 2012-2014, ARM Limited. All rights reserved. 3 // 4 // This program and the accompanying materials 5 // are licensed and made available under the terms and conditions of the BSD License 6 // which accompanies this distribution. The full text of the license may be found at 7 // http://opensource.org/licenses/bsd-license.php 8 // 9 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 // 12 // 13 14 #include <AsmMacroIoLibV8.h> 15 #include <Base.h> 16 #include <AutoGen.h> 17 18 .text 19 .align 3 20 21 GCC_ASM_EXPORT(ArmPlatformStackSet) 22 GCC_ASM_EXPORT(ArmPlatformStackSetPrimary) 23 GCC_ASM_EXPORT(ArmPlatformStackSetSecondary) 24 25 GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore) 26 GCC_ASM_IMPORT(ArmPlatformGetCorePosition) 27 GCC_ASM_IMPORT(ArmPlatformGetPrimaryCoreMpId) 28 29 GCC_ASM_IMPORT(gPcd_FixedAtBuild_PcdCoreCount) 30 31 //VOID 32 //ArmPlatformStackSet ( 33 // IN UINTN StackBase, 34 // IN UINTN MpId, 35 // IN UINTN PrimaryStackSize, 36 // IN UINTN SecondaryStackSize 37 // ); 38 ASM_PFX(ArmPlatformStackSet): 39 // Save parameters 40 mov x6, x3 41 mov x5, x2 42 mov x4, x1 43 mov x3, x0 44 45 // Save the Link register 46 mov x7, x30 47 48 // Identify Stack 49 mov x0, x1 50 bl ASM_PFX(ArmPlatformIsPrimaryCore) 51 cmp x0, #1 52 53 // Restore parameters 54 mov x0, x3 55 mov x1, x4 56 mov x2, x5 57 mov x3, x6 58 59 // Restore the Link register 60 mov x30, x7 61 62 // Should be ASM_PFX(ArmPlatformStackSetPrimary) but generate linker error 'unsupported ELF EM_AARCH64' 63 b.eq ArmPlatformStackSetPrimaryL 64 // Should be ASM_PFX(ArmPlatformStackSetSecondary) but generate linker error 'unsupported ELF EM_AARCH64' 65 b.ne ArmPlatformStackSetSecondaryL 66 67 //VOID 68 //ArmPlatformStackSetPrimary ( 69 // IN UINTN StackBase, 70 // IN UINTN MpId, 71 // IN UINTN PrimaryStackSize, 72 // IN UINTN SecondaryStackSize 73 // ); 74 ArmPlatformStackSetPrimaryL: 75 ASM_PFX(ArmPlatformStackSetPrimary): 76 // Save the Link register 77 mov x4, x30 78 79 // Add stack of primary stack to StackBase 80 add x0, x0, x2 81 82 // Compute SecondaryCoresCount * SecondaryCoreStackSize 83 LoadConstantToReg (_gPcd_FixedAtBuild_PcdCoreCount, x1) 84 ldr w1, [x1] 85 sub x1, x1, #1 86 mul x3, x3, x1 87 88 // Set Primary Stack ((StackBase + PrimaryStackSize) + (SecondaryCoresCount * SecondaryCoreStackSize)) 89 add sp, x0, x3 90 91 br x4 92 93 //VOID 94 //ArmPlatformStackSetSecondary ( 95 // IN UINTN StackBase, 96 // IN UINTN MpId, 97 // IN UINTN PrimaryStackSize, 98 // IN UINTN SecondaryStackSize 99 // ); 100 ArmPlatformStackSetSecondaryL: 101 ASM_PFX(ArmPlatformStackSetSecondary): 102 // Save the Link register 103 mov x4, x30 104 mov sp, x0 105 106 // Get Core Position 107 mov x0, x1 108 bl ASM_PFX(ArmPlatformGetCorePosition) 109 mov x5, x0 110 111 // Get Primary Core Position 112 bl ASM_PFX(ArmPlatformGetPrimaryCoreMpId) 113 bl ASM_PFX(ArmPlatformGetCorePosition) 114 115 // Get Secondary Core Position. We should get consecutive secondary stack number from 1...(CoreCount-1) 116 cmp x5, x0 117 b.ls 1f 118 // Decrement the position if after the primary core 119 sub x5, x5, #1 120 1: 121 add x5, x5, #1 122 123 // Compute top of the secondary stack 124 mul x3, x3, x5 125 126 // Set stack 127 add sp, sp, x3 128 129 br x4 130
