src/arm/linux/cp.h

#include <stdint.h>

#if CPUINFO_MOCK
extern uint32_t cpuinfo_arm_fpsid;
extern uint32_t cpuinfo_arm_mvfr0;
extern uint32_t cpuinfo_arm_wcid;

static inline uint32_t read_fpsid(void) {
	return cpuinfo_arm_fpsid;
}

static inline uint32_t read_mvfr0(void) {
	return cpuinfo_arm_mvfr0;
}

static inline uint32_t read_wcid(void) {
	return cpuinfo_arm_wcid;
}
#else
#if !defined(__ARM_ARCH_7A__) && !defined(__ARM_ARCH_8A__) && !(defined(__ARM_ARCH) && (__ARM_ARCH >= 7))
/*
 * CoProcessor 10 is inaccessible from user mode since ARMv7,
 * and clang refuses to compile inline assembly when targeting ARMv7+
 */
static inline uint32_t read_fpsid(void) {
	uint32_t fpsid;
	__asm__ __volatile__("MRC p10, 0x7, %[fpsid], cr0, cr0, 0" : [fpsid] "=r"(fpsid));
	return fpsid;
}

static inline uint32_t read_mvfr0(void) {
	uint32_t mvfr0;
	__asm__ __volatile__("MRC p10, 0x7, %[mvfr0], cr7, cr0, 0" : [mvfr0] "=r"(mvfr0));
	return mvfr0;
}
#endif
#if !defined(__ARM_ARCH_8A__) && !(defined(__ARM_ARCH) && (__ARM_ARCH >= 8))
/*
 * In ARMv8, AArch32 state supports only conceptual coprocessors CP10, CP11,
 * CP14, and CP15. AArch64 does not support the concept of coprocessors. and
 * clang refuses to compile inline assembly when targeting ARMv8+
 */
static inline uint32_t read_wcid(void) {
	uint32_t wcid;
	__asm__ __volatile__("MRC p1, 0, %[wcid], c0, c0" : [wcid] "=r"(wcid));
	return wcid;
}
#endif
#endif