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GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

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lai
2026-09-06 03:52:57 +08:00
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source/trusted-firmware/trusted-firmware-a-2.8/lib/cpus/aarch64/neoverse_n_common.S
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/*
* 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