| Javier Almansa Sobrino | 9faad3c | 2020-10-23 13:22:07 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2020, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <asm_macros.S> |
| 8 | #include <neoverse_n_common.h> |
| 9 | |
| 10 | .global is_scu_present_in_dsu |
| 11 | |
| 12 | /* |
| 13 | * Check if the SCU L3 Unit is present on the DSU |
| 14 | * 1-> SCU present |
| 15 | * 0-> SCU not present |
| 16 | * |
| 17 | * This function is implemented as weak on dsu_helpers.S and must be |
| 18 | * overwritten for Neoverse Nx cores. |
| 19 | */ |
| 20 | |
| 21 | func is_scu_present_in_dsu |
| 22 | mrs x0, CPUCFR_EL1 |
| 23 | ubfx x0, x0, #SCU_SHIFT, #1 |
| 24 | eor x0, x0, #1 |
| 25 | ret |
| 26 | endfunc is_scu_present_in_dsu |