| /** @file | |
| * | |
| * Copyright (c) 2013-2014, ARM Limited. All rights reserved. | |
| * | |
| * This program and the accompanying materials | |
| * are licensed and made available under the terms and conditions of the BSD License | |
| * which accompanies this distribution. The full text of the license may be found at | |
| * http://opensource.org/licenses/bsd-license.php | |
| * | |
| * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| * | |
| **/ | |
| #include <AsmMacroIoLib.h> | |
| #include <Library/ArmLib.h> | |
| // | |
| // Return the core position from the value of its MpId register | |
| // | |
| // This function returns the core position from the position 0 in the processor. | |
| // This function might be called from assembler before any stack is set. | |
| // | |
| // @return Return the core position | |
| // | |
| //UINTN | |
| //ArmPlatformGetCorePosition ( | |
| // IN UINTN MpId | |
| // ); | |
| // With this function: CorePos = (ClusterId * 2) + CoreId | |
| ASM_FUNC(ArmPlatformGetCorePosition) | |
| and r1, r0, #ARM_CORE_MASK | |
| and r0, r0, #ARM_CLUSTER_MASK | |
| add r0, r1, r0, LSR #7 | |
| bx lr | |
| // | |
| // Return the MpId of the primary core | |
| // | |
| // This function returns the MpId of the primary core. | |
| // This function might be called from assembler before any stack is set. | |
| // | |
| // @return Return the MpId of the primary core | |
| // | |
| //UINTN | |
| //ArmPlatformGetPrimaryCoreMpId ( | |
| // VOID | |
| // ); | |
| ASM_FUNC(ArmPlatformGetPrimaryCoreMpId) | |
| LDRL (r0, PrimaryCoreMpid) | |
| bx lr | |
| // | |
| // Return a non-zero value if the callee is the primary core | |
| // | |
| // This function returns a non-zero value if the callee is the primary core. | |
| // The primary core is the core responsible to initialize the hardware and run UEFI. | |
| // This function might be called from assembler before any stack is set. | |
| // | |
| // @return Return a non-zero value if the callee is the primary core. | |
| // | |
| //UINTN | |
| //ArmPlatformIsPrimaryCore ( | |
| // IN UINTN MpId | |
| // ); | |
| ASM_FUNC(ArmPlatformIsPrimaryCore) | |
| MOV32 (r1, FixedPcdGet32 (PcdArmPrimaryCoreMask)) | |
| and r0, r0, r1 | |
| LDRL (r1, PrimaryCoreMpid) | |
| cmp r0, r1 | |
| moveq r0, #1 | |
| movne r0, #0 | |
| bx lr | |
| // | |
| // First platform specific function to be called in the PEI phase | |
| // | |
| // This function is actually the first function called by the PrePi | |
| // or PrePeiCore modules. It allows to retrieve arguments passed to | |
| // the UEFI firmware through the CPU registers. | |
| // | |
| ASM_FUNC(ArmPlatformPeiBootAction) | |
| // The trusted firmware passes the primary CPU MPID through r0 register. | |
| // Save it in a variable. | |
| adr r1, PrimaryCoreMpid | |
| str r0, [r1] | |
| bx lr | |
| PrimaryCoreMpid: .word 0x0 |