| Dimitris Papastamos | 0b00f8a | 2018-02-14 10:00:06 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018, 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 <cpuamu.h> |
| 10 | |
| 11 | .globl cpuamu_cnt_read |
| 12 | .globl cpuamu_cnt_write |
| 13 | .globl cpuamu_read_cpuamcntenset_el0 |
| 14 | .globl cpuamu_read_cpuamcntenclr_el0 |
| 15 | .globl cpuamu_write_cpuamcntenset_el0 |
| 16 | .globl cpuamu_write_cpuamcntenclr_el0 |
| 17 | |
| 18 | /* |
| 19 | * uint64_t cpuamu_cnt_read(int idx); |
| 20 | * |
| 21 | * Given `idx`, read the corresponding AMU counter |
| 22 | * and return it in `x0`. |
| 23 | */ |
| 24 | func cpuamu_cnt_read |
| 25 | adr x1, 1f |
| 26 | lsl x0, x0, #3 |
| 27 | add x1, x1, x0 |
| 28 | br x1 |
| 29 | |
| 30 | 1: |
| 31 | mrs x0, CPUAMEVCNTR0_EL0 |
| 32 | ret |
| 33 | mrs x0, CPUAMEVCNTR1_EL0 |
| 34 | ret |
| 35 | mrs x0, CPUAMEVCNTR2_EL0 |
| 36 | ret |
| 37 | mrs x0, CPUAMEVCNTR3_EL0 |
| 38 | ret |
| 39 | mrs x0, CPUAMEVCNTR4_EL0 |
| 40 | ret |
| 41 | endfunc cpuamu_cnt_read |
| 42 | |
| 43 | /* |
| 44 | * void cpuamu_cnt_write(int idx, uint64_t val); |
| 45 | * |
| 46 | * Given `idx`, write `val` to the corresponding AMU counter. |
| 47 | */ |
| 48 | func cpuamu_cnt_write |
| 49 | adr x2, 1f |
| 50 | lsl x0, x0, #3 |
| 51 | add x2, x2, x0 |
| 52 | br x2 |
| 53 | |
| 54 | 1: |
| 55 | msr CPUAMEVCNTR0_EL0, x0 |
| 56 | ret |
| 57 | msr CPUAMEVCNTR1_EL0, x0 |
| 58 | ret |
| 59 | msr CPUAMEVCNTR2_EL0, x0 |
| 60 | ret |
| 61 | msr CPUAMEVCNTR3_EL0, x0 |
| 62 | ret |
| 63 | msr CPUAMEVCNTR4_EL0, x0 |
| 64 | ret |
| 65 | endfunc cpuamu_cnt_write |
| 66 | |
| 67 | /* |
| 68 | * unsigned int cpuamu_read_cpuamcntenset_el0(void); |
| 69 | * |
| 70 | * Read the `CPUAMCNTENSET_EL0` CPU register and return |
| 71 | * it in `x0`. |
| 72 | */ |
| 73 | func cpuamu_read_cpuamcntenset_el0 |
| 74 | mrs x0, CPUAMCNTENSET_EL0 |
| 75 | ret |
| 76 | endfunc cpuamu_read_cpuamcntenset_el0 |
| 77 | |
| 78 | /* |
| 79 | * unsigned int cpuamu_read_cpuamcntenclr_el0(void); |
| 80 | * |
| 81 | * Read the `CPUAMCNTENCLR_EL0` CPU register and return |
| 82 | * it in `x0`. |
| 83 | */ |
| 84 | func cpuamu_read_cpuamcntenclr_el0 |
| 85 | mrs x0, CPUAMCNTENCLR_EL0 |
| 86 | ret |
| 87 | endfunc cpuamu_read_cpuamcntenclr_el0 |
| 88 | |
| 89 | /* |
| 90 | * void cpuamu_write_cpuamcntenset_el0(unsigned int mask); |
| 91 | * |
| 92 | * Write `mask` to the `CPUAMCNTENSET_EL0` CPU register. |
| 93 | */ |
| 94 | func cpuamu_write_cpuamcntenset_el0 |
| 95 | msr CPUAMCNTENSET_EL0, x0 |
| 96 | ret |
| 97 | endfunc cpuamu_write_cpuamcntenset_el0 |
| 98 | |
| 99 | /* |
| 100 | * void cpuamu_write_cpuamcntenclr_el0(unsigned int mask); |
| 101 | * |
| 102 | * Write `mask` to the `CPUAMCNTENCLR_EL0` CPU register. |
| 103 | */ |
| 104 | func cpuamu_write_cpuamcntenclr_el0 |
| 105 | msr CPUAMCNTENCLR_EL0, x0 |
| 106 | ret |
| 107 | endfunc cpuamu_write_cpuamcntenclr_el0 |