mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-11-04 02:11:25 +01:00
62e92077a8
When building a Thumb-1-only target with CONFIG_SYS_THUMB_BUILD, some files fail to build, most of the time because they include mcr instructions, which only exist for Thumb-2. This patch introduces a Kconfig option CONFIG_THUMB2 and uses it to select between Thumb-2 and ARM mode for the aforementioned files. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*
|
|
* 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 */
|