1*f739fcd8STom Rini /* SPDX-License-Identifier: GPL-2.0+ */ 262e92077SAlbert ARIBAUD /* 362e92077SAlbert ARIBAUD * Thumb-1 drop-in for the linux/include/asm-arm/proc-armv/system.h 462e92077SAlbert ARIBAUD * 562e92077SAlbert ARIBAUD * (C) Copyright 2015 662e92077SAlbert ARIBAUD * Albert ARIBAUD <albert.u.boot@aribaud.net> 762e92077SAlbert ARIBAUD * 862e92077SAlbert ARIBAUD * The original file does not build in Thumb mode. However, in U-Boot 962e92077SAlbert ARIBAUD * we don't use interrupt context, so we can redefine these as empty 1062e92077SAlbert ARIBAUD * memory barriers, which makes Thumb-1 compiler happy. 1162e92077SAlbert ARIBAUD */ 1262e92077SAlbert ARIBAUD 1362e92077SAlbert ARIBAUD /* 1462e92077SAlbert ARIBAUD * Use the same macro name as linux/include/asm-arm/proc-armv/system.h 1562e92077SAlbert ARIBAUD * here, so that if the original ever gets included after us, it won't 1662e92077SAlbert ARIBAUD * try to re-redefine anything. 1762e92077SAlbert ARIBAUD */ 1862e92077SAlbert ARIBAUD 1962e92077SAlbert ARIBAUD #ifndef __ASM_PROC_SYSTEM_H 2062e92077SAlbert ARIBAUD #define __ASM_PROC_SYSTEM_H 2162e92077SAlbert ARIBAUD 2262e92077SAlbert ARIBAUD /* 2362e92077SAlbert ARIBAUD * Redefine all original macros with static inline functions containing 2462e92077SAlbert ARIBAUD * a simple memory barrier, so that they produce the same instruction 2562e92077SAlbert ARIBAUD * ordering constraints as their original counterparts. 2662e92077SAlbert ARIBAUD * We use static inline functions rather than macros so that we can tell 2762e92077SAlbert ARIBAUD * the compiler to not complain about unused arguments. 2862e92077SAlbert ARIBAUD */ 2962e92077SAlbert ARIBAUD 3062e92077SAlbert ARIBAUD static inline void local_irq_save( 3162e92077SAlbert ARIBAUD unsigned long flags __attribute__((unused))) 3262e92077SAlbert ARIBAUD { 3362e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 3462e92077SAlbert ARIBAUD } 3562e92077SAlbert ARIBAUD 3662e92077SAlbert ARIBAUD static inline void local_irq_enable(void) 3762e92077SAlbert ARIBAUD { 3862e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 3962e92077SAlbert ARIBAUD } 4062e92077SAlbert ARIBAUD 4162e92077SAlbert ARIBAUD static inline void local_irq_disable(void) 4262e92077SAlbert ARIBAUD { 4362e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 4462e92077SAlbert ARIBAUD } 4562e92077SAlbert ARIBAUD 4662e92077SAlbert ARIBAUD static inline void __stf(void) 4762e92077SAlbert ARIBAUD { 4862e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 4962e92077SAlbert ARIBAUD } 5062e92077SAlbert ARIBAUD 5162e92077SAlbert ARIBAUD static inline void __clf(void) 5262e92077SAlbert ARIBAUD { 5362e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 5462e92077SAlbert ARIBAUD } 5562e92077SAlbert ARIBAUD 5662e92077SAlbert ARIBAUD static inline void local_save_flags( 5762e92077SAlbert ARIBAUD unsigned long flags __attribute__((unused))) 5862e92077SAlbert ARIBAUD { 5962e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 6062e92077SAlbert ARIBAUD } 6162e92077SAlbert ARIBAUD 6262e92077SAlbert ARIBAUD static inline void local_irq_restore( 6362e92077SAlbert ARIBAUD unsigned long flags __attribute__((unused))) 6462e92077SAlbert ARIBAUD { 6562e92077SAlbert ARIBAUD __asm__ __volatile__ ("" : : : "memory"); 6662e92077SAlbert ARIBAUD } 6762e92077SAlbert ARIBAUD 6862e92077SAlbert ARIBAUD #endif /* __ASM_PROC_SYSTEM_H */ 69