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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
commit b1928b41c0
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source/bootloader/u-boot-2020.01/arch/arm/include/asm/armv8/cpu.h
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2018 NXP
*/
#define MIDR_PARTNUM_CORTEX_A35 0xD04
#define MIDR_PARTNUM_CORTEX_A53 0xD03
#define MIDR_PARTNUM_CORTEX_A72 0xD08
#define MIDR_PARTNUM_SHIFT 0x4
#define MIDR_PARTNUM_MASK (0xFFF << 0x4)
static inline unsigned int read_midr(void)
{
unsigned long val;
asm volatile("mrs %0, midr_el1" : "=r" (val));
return val;
}
#define is_cortex_a35() (((read_midr() & MIDR_PARTNUM_MASK) >> \
MIDR_PARTNUM_SHIFT) == MIDR_PARTNUM_CORTEX_A35)
#define is_cortex_a53() (((read_midr() & MIDR_PARTNUM_MASK) >> \
MIDR_PARTNUM_SHIFT) == MIDR_PARTNUM_CORTEX_A53)
#define is_cortex_a72() (((read_midr() & MIDR_PARTNUM_MASK) >>\
MIDR_PARTNUM_SHIFT) == MIDR_PARTNUM_CORTEX_A72)