projects / mirror_edk2.git / blame
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|---|---|---|
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1 | /** @file\r |
| 2 | *\r | |
| 3 | * Copyright (c) 2013-2014, ARM Limited. All rights reserved.\r | |
| 4 | *\r | |
| 5 | * 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 | |
| a0f56915 | 15 | #include <AsmMacroIoLib.h>\r |
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16 | #include <Library/ArmLib.h>\r |
| 17 | \r | |
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18 | //\r |
| 19 | // Return the core position from the value of its MpId register\r | |
| 20 | //\r | |
| 21 | // This function returns the core position from the position 0 in the processor.\r | |
| 22 | // This function might be called from assembler before any stack is set.\r | |
| 23 | //\r | |
| 24 | // @return Return the core position\r | |
| 25 | //\r | |
| 26 | //UINTN\r | |
| 27 | //ArmPlatformGetCorePosition (\r | |
| 28 | // IN UINTN MpId\r | |
| 29 | // );\r | |
| 30 | // With this function: CorePos = (ClusterId * 2) + CoreId\r | |
| a0f56915 | 31 | ASM_FUNC(ArmPlatformGetCorePosition)\r |
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32 | and r1, r0, #ARM_CORE_MASK\r |
| 33 | and r0, r0, #ARM_CLUSTER_MASK\r | |
| 34 | add r0, r1, r0, LSR #7\r | |
| 35 | bx lr\r | |
| 36 | \r | |
| 37 | //\r | |
| 38 | // Return the MpId of the primary core\r | |
| 39 | //\r | |
| 40 | // This function returns the MpId of the primary core.\r | |
| 41 | // This function might be called from assembler before any stack is set.\r | |
| 42 | //\r | |
| 43 | // @return Return the MpId of the primary core\r | |
| 44 | //\r | |
| 45 | //UINTN\r | |
| 46 | //ArmPlatformGetPrimaryCoreMpId (\r | |
| 47 | // VOID\r | |
| 48 | // );\r | |
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49 | ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)\r |
| 50 | LDRL (r0, PrimaryCoreMpid)\r | |
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51 | bx lr\r |
| 52 | \r | |
| 53 | //\r | |
| 54 | // Return a non-zero value if the callee is the primary core\r | |
| 55 | //\r | |
| 56 | // This function returns a non-zero value if the callee is the primary core.\r | |
| 57 | // The primary core is the core responsible to initialize the hardware and run UEFI.\r | |
| 58 | // This function might be called from assembler before any stack is set.\r | |
| 59 | //\r | |
| 60 | // @return Return a non-zero value if the callee is the primary core.\r | |
| 61 | //\r | |
| 62 | //UINTN\r | |
| 63 | //ArmPlatformIsPrimaryCore (\r | |
| 64 | // IN UINTN MpId\r | |
| 65 | // );\r | |
| a0f56915 AB |
66 | ASM_FUNC(ArmPlatformIsPrimaryCore)\r |
| 67 | MOV32 (r1, FixedPcdGet32 (PcdArmPrimaryCoreMask))\r | |
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68 | and r0, r0, r1\r |
| 69 | \r | |
| a0f56915 | 70 | LDRL (r1, PrimaryCoreMpid)\r |
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71 | \r |
| 72 | cmp r0, r1\r | |
| 73 | moveq r0, #1\r | |
| 74 | movne r0, #0\r | |
| 75 | bx lr\r | |
| 76 | \r | |
| 77 | //\r | |
| 78 | // First platform specific function to be called in the PEI phase\r | |
| 79 | //\r | |
| 80 | // This function is actually the first function called by the PrePi\r | |
| 81 | // or PrePeiCore modules. It allows to retrieve arguments passed to\r | |
| 82 | // the UEFI firmware through the CPU registers.\r | |
| 83 | //\r | |
| a0f56915 | 84 | ASM_FUNC(ArmPlatformPeiBootAction)\r |
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85 | // The trusted firmware passes the primary CPU MPID through r0 register.\r |
| 86 | // Save it in a variable.\r | |
| a0f56915 | 87 | adr r1, PrimaryCoreMpid\r |
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88 | str r0, [r1]\r |
| 89 | bx lr\r | |
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90 | \r |
| 91 | PrimaryCoreMpid: .word 0x0\r |