| /* |
| * arch/aarch32/utils.S - basic utilities |
| * |
| * Copyright (C) 2015 ARM Limited. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE.txt file. |
| */ |
| |
| #include <cpu.h> |
| #include <linkage.h> |
| |
| .text |
| |
| /* |
| * Takes masked MPIDR in r0, returns logical ID in r0. |
| * Z flag is set when CPU is primary; cleared otherwise. |
| * Returns MPIDR_INVALID for unknown MPIDRs |
| * Clobbers r1, r2, r3. |
| */ |
| ASM_FUNC(find_logical_id) |
| ldr r2, =id_table |
| mov r1, #0 |
| 1: mov r3, #NR_CPUS |
| |
| cmp r1, r3 |
| bgt 3f |
| ldr r3, [r2, r1, lsl #2] |
| cmp r3, r0 |
| beq 2f |
| add r1, r1, #1 |
| b 1b |
| |
| 2: movs r0, r1 |
| bx lr |
| 3: mov r0, #MPIDR_INVALID |
| bx lr |
