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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_ARM_IRQFLAGS_H
#define __ASM_ARM_IRQFLAGS_H
#ifdef __KERNEL__
#include <asm/ptrace.h>
/*
* CPU interrupt mask handling.
*/
#ifdef CONFIG_CPU_V7M
#define IRQMASK_REG_NAME_R "primask"
#define IRQMASK_REG_NAME_W "primask"
#define IRQMASK_I_BIT 1
#else
#define IRQMASK_REG_NAME_R "cpsr"
#define IRQMASK_REG_NAME_W "cpsr_c"
#define IRQMASK_I_BIT PSR_I_BIT
#endif
#if __LINUX_ARM_ARCH__ >= 6
#define arch_local_irq_save arch_local_irq_save
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
asm volatile(
" mrs %0, " IRQMASK_REG_NAME_R " @ arch_local_irq_save\n"
" cpsid i"
: "=r" (flags) : : "memory", "cc");
return flags;
}
#define arch_local_irq_enable arch_local_irq_enable
static inline void arch_local_irq_enable(void)
{
asm volatile(
" cpsie i @ arch_local_irq_enable"
:
:
: "memory", "cc");
}
#define arch_local_irq_disable arch_local_irq_disable
static inline void arch_local_irq_disable(void)
{
asm volatile(
" cpsid i @ arch_local_irq_disable"
:
:
: "memory", "cc");
}
#define local_fiq_enable() __asm__("cpsie f @ __stf" : : : "memory", "cc")
#define local_fiq_disable() __asm__("cpsid f @ __clf" : : : "memory", "cc")
#ifndef CONFIG_CPU_V7M
#define local_abt_enable() __asm__("cpsie a @ __sta" : : : "memory", "cc")
#define local_abt_disable() __asm__("cpsid a @ __cla" : : : "memory", "cc")
#else
#define local_abt_enable() do { } while (0)
#define local_abt_disable() do { } while (0)
#endif
#else
/*
* Save the current interrupt enable state & disable IRQs
*/
#define arch_local_irq_save arch_local_irq_save
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags, temp;
asm volatile(
" mrs %0, cpsr @ arch_local_irq_save\n"
" orr %1, %0, #128\n"
" msr cpsr_c, %1"
: "=r" (flags), "=r" (temp)
:
: "memory", "cc");
return flags;
}
/*
* Enable IRQs
*/
#define arch_local_irq_enable arch_local_irq_enable
static inline void arch_local_irq_enable(void)
{
unsigned long temp;
asm volatile(
" mrs %0, cpsr @ arch_local_irq_enable\n"
" bic %0, %0, #128\n"
" msr cpsr_c, %0"
: "=r" (temp)
:
: "memory", "cc");
}
/*
* Disable IRQs
*/
#define arch_local_irq_disable arch_local_irq_disable
static inline void arch_local_irq_disable(void)
{
unsigned long temp;
asm volatile(
" mrs %0, cpsr @ arch_local_irq_disable\n"
" orr %0, %0, #128\n"
" msr cpsr_c, %0"
: "=r" (temp)
:
: "memory", "cc");
}
/*
* Enable FIQs
*/
#define local_fiq_enable() \
({ \
unsigned long temp; \
__asm__ __volatile__( \
"mrs %0, cpsr @ stf\n" \
" bic %0, %0, #64\n" \
" msr cpsr_c, %0" \
: "=r" (temp) \
: \
: "memory", "cc"); \
})
/*
* Disable FIQs
*/
#define local_fiq_disable() \
({ \
unsigned long temp; \
__asm__ __volatile__( \
"mrs %0, cpsr @ clf\n" \
" orr %0, %0, #64\n" \
" msr cpsr_c, %0" \
: "=r" (temp) \
: \
: "memory", "cc"); \
})
#define local_abt_enable() do { } while (0)
#define local_abt_disable() do { } while (0)
#endif
/*
* Save the current interrupt enable state.
*/
#define arch_local_save_flags arch_local_save_flags
static inline unsigned long arch_local_save_flags(void)
{
unsigned long flags;
asm volatile(
" mrs %0, " IRQMASK_REG_NAME_R " @ local_save_flags"
: "=r" (flags) : : "memory", "cc");
return flags;
}
/*
* restore saved IRQ & FIQ state
*/
#define arch_local_irq_restore arch_local_irq_restore
static inline void arch_local_irq_restore(unsigned long flags)
{
asm volatile(
" msr " IRQMASK_REG_NAME_W ", %0 @ local_irq_restore"
:
: "r" (flags)
: "memory", "cc");
}
#define arch_irqs_disabled_flags arch_irqs_disabled_flags
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return flags & IRQMASK_I_BIT;
}
#include <asm-generic/irqflags.h>
#endif /* ifdef __KERNEL__ */
#endif /* ifndef __ASM_ARM_IRQFLAGS_H */
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