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/*
* Thumb-1 drop-in for the linux/include/asm-arm/proc-armv/system.h
*
* (C) Copyright 2015
* Albert ARIBAUD <albert.u.boot@aribaud.net>
*
* The original file does not build in Thumb mode. However, in U-Boot
* we don't use interrupt context, so we can redefine these as empty
* memory barriers, which makes Thumb-1 compiler happy.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Use the same macro name as linux/include/asm-arm/proc-armv/system.h
* here, so that if the original ever gets included after us, it won't
* try to re-redefine anything.
*/
#ifndef __ASM_PROC_SYSTEM_H
#define __ASM_PROC_SYSTEM_H
/*
* Redefine all original macros with static inline functions containing
* a simple memory barrier, so that they produce the same instruction
* ordering constraints as their original counterparts.
* We use static inline functions rather than macros so that we can tell
* the compiler to not complain about unused arguments.
*/
static inline void local_irq_save(
unsigned long flags __attribute__((unused)))
{
__asm__ __volatile__ ("" : : : "memory");
}
static inline void local_irq_enable(void)
{
__asm__ __volatile__ ("" : : : "memory");
}
static inline void local_irq_disable(void)
{
__asm__ __volatile__ ("" : : : "memory");
}
static inline void __stf(void)
{
__asm__ __volatile__ ("" : : : "memory");
}
static inline void __clf(void)
{
__asm__ __volatile__ ("" : : : "memory");
}
static inline void local_save_flags(
unsigned long flags __attribute__((unused)))
{
__asm__ __volatile__ ("" : : : "memory");
}
static inline void local_irq_restore(
unsigned long flags __attribute__((unused)))
{
__asm__ __volatile__ ("" : : : "memory");
}
#endif /* __ASM_PROC_SYSTEM_H */
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