Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * include/asm/irqflags.h
 *
 * IRQ flags handling
 *
 * This file gets included from lowlevel asm headers too, to provide
 * wrapped versions of the local_irq_*() APIs, based on the
 * arch_local_irq_*() functions from the lowlevel headers.
 */
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
 
#include <asm/pil.h>
 
#ifndef __ASSEMBLY__
 
static inline notrace unsigned long arch_local_save_flags(void)
{
<------>unsigned long flags;
 
<------>__asm__ __volatile__(
<------><------>"rdpr	%%pil, %0"
<------><------>: "=r" (flags)
<------>);
 
<------>return flags;
}
 
static inline notrace void arch_local_irq_restore(unsigned long flags)
{
<------>__asm__ __volatile__(
<------><------>"wrpr	%0, %%pil"
<------><------>: /* no output */
<------><------>: "r" (flags)
<------><------>: "memory"
<------>);
}
 
static inline notrace void arch_local_irq_disable(void)
{
<------>__asm__ __volatile__(
<------><------>"wrpr	%0, %%pil"
<------><------>: /* no outputs */
<------><------>: "i" (PIL_NORMAL_MAX)
<------><------>: "memory"
<------>);
}
 
static inline notrace void arch_local_irq_enable(void)
{
<------>__asm__ __volatile__(
<------><------>"wrpr	0, %%pil"
<------><------>: /* no outputs */
<------><------>: /* no inputs */
<------><------>: "memory"
<------>);
}
 
static inline notrace int arch_irqs_disabled_flags(unsigned long flags)
{
<------>return (flags > 0);
}
 
static inline notrace int arch_irqs_disabled(void)
{
<------>return arch_irqs_disabled_flags(arch_local_save_flags());
}
 
static inline notrace unsigned long arch_local_irq_save(void)
{
<------>unsigned long flags, tmp;
 
<------>/* Disable interrupts to PIL_NORMAL_MAX unless we already
<------> * are using PIL_NMI, in which case PIL_NMI is retained.
<------> *
<------> * The only values we ever program into the %pil are 0,
<------> * PIL_NORMAL_MAX and PIL_NMI.
<------> *
<------> * Since PIL_NMI is the largest %pil value and all bits are
<------> * set in it (0xf), it doesn't matter what PIL_NORMAL_MAX
<------> * actually is.
<------> */
<------>__asm__ __volatile__(
<------><------>"rdpr	%%pil, %0\n\t"
<------><------>"or	%0, %2, %1\n\t"
<------><------>"wrpr	%1, 0x0, %%pil"
<------><------>: "=r" (flags), "=r" (tmp)
<------><------>: "i" (PIL_NORMAL_MAX)
<------><------>: "memory"
<------>);
 
<------>return flags;
}
 
#endif /* (__ASSEMBLY__) */
 
#endif /* !(_ASM_IRQFLAGS_H) */