| developer | 2189d3a | 2020-04-17 17:14:23 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
| 9 | #include <platform_def.h> |
| 10 | |
| 11 | .globl plat_is_my_cpu_primary |
| 12 | .globl plat_my_core_pos |
| 13 | .globl plat_mediatek_calc_core_pos |
| 14 | |
| 15 | func plat_is_my_cpu_primary |
| 16 | mrs x0, mpidr_el1 |
| 17 | and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) |
| 18 | cmp x0, #PLAT_PRIMARY_CPU |
| 19 | cset x0, eq |
| 20 | ret |
| 21 | endfunc plat_is_my_cpu_primary |
| 22 | |
| 23 | /* ----------------------------------------------------- |
| 24 | * unsigned int plat_my_core_pos(void) |
| 25 | * This function uses the plat_mediatek_calc_core_pos() |
| 26 | * definition to get the index of the calling CPU. |
| 27 | * ----------------------------------------------------- |
| 28 | */ |
| 29 | func plat_my_core_pos |
| 30 | mrs x0, mpidr_el1 |
| 31 | b plat_mediatek_calc_core_pos |
| 32 | endfunc plat_my_core_pos |
| 33 | |
| 34 | /* ----------------------------------------------------- |
| 35 | * unsigned int plat_mediatek_calc_core_pos(u_register_t mpidr); |
| 36 | * |
| 37 | * In ARMv8.2, AFF2 is cluster id, AFF1 is core id and |
| 38 | * AFF0 is thread id. There is only one cluster in ARMv8.2 |
| 39 | * and one thread in current implementation. |
| 40 | * |
| 41 | * With this function: CorePos = CoreID (AFF1) |
| 42 | * we do it with x0 = (x0 >> 8) & 0xff |
| 43 | * ----------------------------------------------------- |
| 44 | */ |
| 45 | func plat_mediatek_calc_core_pos |
| 46 | mov x1, #MPIDR_AFFLVL_MASK |
| 47 | and x0, x1, x0, lsr #MPIDR_AFF1_SHIFT |
| 48 | ret |
| 49 | endfunc plat_mediatek_calc_core_pos |