mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
fa64d8429b
Add helper functions to identify different armv8 variants. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Anatolij Gustschin <agust@denx.de> Cc: Stefano Babic <sbabic@denx.de>
26 lines
738 B
C
26 lines
738 B
C
/* 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)
|