| Jacky Bai | 8e2109d | 2023-05-25 09:35:44 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2022-2023 NXP |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <asm_macros.S> |
| 8 | #include <cortex_a55.h> |
| 9 | |
| 10 | #include <platform_def.h> |
| 11 | |
| 12 | .globl plat_is_my_cpu_primary |
| 13 | .globl plat_my_core_pos |
| 14 | .globl plat_calc_core_pos |
| 15 | .globl platform_mem_init |
| 16 | |
| 17 | /* ------------------------------------------------------ |
| 18 | * Helper macro that reads the part number of the current |
| 19 | * CPU and jumps to the given label if it matches the CPU |
| 20 | * MIDR provided. |
| 21 | * |
| 22 | * Clobbers x0. |
| 23 | * ------------------------------------------------------ |
| 24 | */ |
| 25 | .macro jump_if_cpu_midr _cpu_midr, _label |
| 26 | |
| 27 | mrs x0, midr_el1 |
| 28 | ubfx x0, x0, MIDR_PN_SHIFT, #12 |
| 29 | cmp w0, #((\_cpu_midr >> MIDR_PN_SHIFT) & MIDR_PN_MASK) |
| 30 | b.eq \_label |
| 31 | |
| 32 | .endm |
| 33 | |
| 34 | /* ---------------------------------------------- |
| 35 | * unsigned int plat_is_my_cpu_primary(void); |
| 36 | * This function checks if this is the primary CPU |
| 37 | * ---------------------------------------------- |
| 38 | */ |
| 39 | func plat_is_my_cpu_primary |
| 40 | mrs x0, mpidr_el1 |
| 41 | mov_imm x1, MPIDR_AFFINITY_MASK |
| 42 | and x0, x0, x1 |
| 43 | cmp x0, #PLAT_PRIMARY_CPU |
| 44 | cset x0, eq |
| 45 | ret |
| 46 | endfunc plat_is_my_cpu_primary |
| 47 | |
| 48 | /* ---------------------------------------------- |
| 49 | * unsigned int plat_my_core_pos(void) |
| 50 | * This function uses the plat_calc_core_pos() |
| 51 | * to get the index of the calling CPU. |
| 52 | * ---------------------------------------------- |
| 53 | */ |
| 54 | func plat_my_core_pos |
| 55 | mrs x0, mpidr_el1 |
| 56 | mov x1, #MPIDR_AFFLVL_MASK |
| 57 | and x0, x1, x0, lsr #MPIDR_AFF1_SHIFT |
| 58 | ret |
| 59 | endfunc plat_my_core_pos |
| 60 | |
| 61 | /* |
| 62 | * unsigned int plat_calc_core_pos(uint64_t mpidr) |
| 63 | * helper function to calculate the core position. |
| 64 | * With this function. |
| 65 | */ |
| 66 | func plat_calc_core_pos |
| 67 | mov x1, #MPIDR_AFFLVL_MASK |
| 68 | and x0, x1, x0, lsr #MPIDR_AFF1_SHIFT |
| 69 | ret |
| 70 | endfunc plat_calc_core_pos |
| 71 | |
| 72 | func platform_mem_init |
| 73 | ret |
| 74 | endfunc platform_mem_init |