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Diffstat (limited to '')
| -rw-r--r-- | lib/cpus/aarch64/neoverse_n_common.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/neoverse_n_common.S b/lib/cpus/aarch64/neoverse_n_common.S new file mode 100644 index 0000000..b816342 --- /dev/null +++ b/lib/cpus/aarch64/neoverse_n_common.S @@ -0,0 +1,26 @@ +/* + * Copyright (c) 2020, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <asm_macros.S> +#include <neoverse_n_common.h> + + .global is_scu_present_in_dsu + +/* + * Check if the SCU L3 Unit is present on the DSU + * 1-> SCU present + * 0-> SCU not present + * + * This function is implemented as weak on dsu_helpers.S and must be + * overwritten for Neoverse Nx cores. + */ + +func is_scu_present_in_dsu + mrs x0, CPUCFR_EL1 + ubfx x0, x0, #SCU_SHIFT, #1 + eor x0, x0, #1 + ret +endfunc is_scu_present_in_dsu |