83 lines
2 KiB
C
Executable file
83 lines
2 KiB
C
Executable file
/*
|
|
* Xtensa IRQ flags handling functions
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2001 - 2005 Tensilica Inc.
|
|
* Copyright (C) 2015 Cadence Design Systems Inc.
|
|
*/
|
|
|
|
#ifndef _XTENSA_IRQFLAGS_H
|
|
#define _XTENSA_IRQFLAGS_H
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/processor.h>
|
|
|
|
static inline unsigned long arch_local_save_flags(void)
|
|
{
|
|
unsigned long flags;
|
|
asm volatile("rsr %0, ps" : "=a" (flags));
|
|
return flags;
|
|
}
|
|
|
|
static inline unsigned long arch_local_irq_save(void)
|
|
{
|
|
unsigned long flags;
|
|
#if XTENSA_FAKE_NMI
|
|
#if defined(CONFIG_DEBUG_KERNEL) && (LOCKLEVEL | TOPLEVEL) >= XCHAL_DEBUGLEVEL
|
|
unsigned long tmp;
|
|
|
|
asm volatile("rsr %0, ps\t\n"
|
|
"extui %1, %0, 0, 4\t\n"
|
|
"bgei %1, "__stringify(LOCKLEVEL)", 1f\t\n"
|
|
"rsil %0, "__stringify(LOCKLEVEL)"\n"
|
|
"1:"
|
|
: "=a" (flags), "=a" (tmp) :: "memory");
|
|
#else
|
|
asm volatile("rsr %0, ps\t\n"
|
|
"or %0, %0, %1\t\n"
|
|
"xsr %0, ps\t\n"
|
|
"rsync"
|
|
: "=&a" (flags) : "a" (LOCKLEVEL) : "memory");
|
|
#endif
|
|
#else
|
|
asm volatile("rsil %0, "__stringify(LOCKLEVEL)
|
|
: "=a" (flags) :: "memory");
|
|
#endif
|
|
return flags;
|
|
}
|
|
|
|
static inline void arch_local_irq_disable(void)
|
|
{
|
|
arch_local_irq_save();
|
|
}
|
|
|
|
static inline void arch_local_irq_enable(void)
|
|
{
|
|
unsigned long flags;
|
|
asm volatile("rsil %0, 0" : "=a" (flags) :: "memory");
|
|
}
|
|
|
|
static inline void arch_local_irq_restore(unsigned long flags)
|
|
{
|
|
asm volatile("wsr %0, ps; rsync"
|
|
:: "a" (flags) : "memory");
|
|
}
|
|
|
|
static inline bool arch_irqs_disabled_flags(unsigned long flags)
|
|
{
|
|
#if XCHAL_EXCM_LEVEL < LOCKLEVEL || (1 << PS_EXCM_BIT) < LOCKLEVEL
|
|
#error "XCHAL_EXCM_LEVEL and 1<<PS_EXCM_BIT must be no less than LOCKLEVEL"
|
|
#endif
|
|
return (flags & (PS_INTLEVEL_MASK | (1 << PS_EXCM_BIT))) >= LOCKLEVEL;
|
|
}
|
|
|
|
static inline bool arch_irqs_disabled(void)
|
|
{
|
|
return arch_irqs_disabled_flags(arch_local_save_flags());
|
|
}
|
|
|
|
#endif /* _XTENSA_IRQFLAGS_H */
|