123 строки
2.6 KiB
C
123 строки
2.6 KiB
C
/*
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _ASM_MICROBLAZE_IRQFLAGS_H
|
|
#define _ASM_MICROBLAZE_IRQFLAGS_H
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/registers.h>
|
|
|
|
#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
|
|
|
|
static inline notrace unsigned long arch_local_irq_save(void)
|
|
{
|
|
unsigned long flags;
|
|
asm volatile(" msrclr %0, %1 \n"
|
|
" nop \n"
|
|
: "=r"(flags)
|
|
: "i"(MSR_IE)
|
|
: "memory");
|
|
return flags;
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_disable(void)
|
|
{
|
|
/* this uses r0 without declaring it - is that correct? */
|
|
asm volatile(" msrclr r0, %0 \n"
|
|
" nop \n"
|
|
:
|
|
: "i"(MSR_IE)
|
|
: "memory");
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_enable(void)
|
|
{
|
|
/* this uses r0 without declaring it - is that correct? */
|
|
asm volatile(" msrset r0, %0 \n"
|
|
" nop \n"
|
|
:
|
|
: "i"(MSR_IE)
|
|
: "memory");
|
|
}
|
|
|
|
#else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
|
|
|
|
static inline notrace unsigned long arch_local_irq_save(void)
|
|
{
|
|
unsigned long flags, tmp;
|
|
asm volatile (" mfs %0, rmsr \n"
|
|
" nop \n"
|
|
" andi %1, %0, %2 \n"
|
|
" mts rmsr, %1 \n"
|
|
" nop \n"
|
|
: "=r"(flags), "=r"(tmp)
|
|
: "i"(~MSR_IE)
|
|
: "memory");
|
|
return flags;
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_disable(void)
|
|
{
|
|
unsigned long tmp;
|
|
asm volatile(" mfs %0, rmsr \n"
|
|
" nop \n"
|
|
" andi %0, %0, %1 \n"
|
|
" mts rmsr, %0 \n"
|
|
" nop \n"
|
|
: "=r"(tmp)
|
|
: "i"(~MSR_IE)
|
|
: "memory");
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_enable(void)
|
|
{
|
|
unsigned long tmp;
|
|
asm volatile(" mfs %0, rmsr \n"
|
|
" nop \n"
|
|
" ori %0, %0, %1 \n"
|
|
" mts rmsr, %0 \n"
|
|
" nop \n"
|
|
: "=r"(tmp)
|
|
: "i"(MSR_IE)
|
|
: "memory");
|
|
}
|
|
|
|
#endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
|
|
|
|
static inline notrace unsigned long arch_local_save_flags(void)
|
|
{
|
|
unsigned long flags;
|
|
asm volatile(" mfs %0, rmsr \n"
|
|
" nop \n"
|
|
: "=r"(flags)
|
|
:
|
|
: "memory");
|
|
return flags;
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_restore(unsigned long flags)
|
|
{
|
|
asm volatile(" mts rmsr, %0 \n"
|
|
" nop \n"
|
|
:
|
|
: "r"(flags)
|
|
: "memory");
|
|
}
|
|
|
|
static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
|
|
{
|
|
return (flags & MSR_IE) == 0;
|
|
}
|
|
|
|
static inline notrace bool arch_irqs_disabled(void)
|
|
{
|
|
return arch_irqs_disabled_flags(arch_local_save_flags());
|
|
}
|
|
|
|
#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
|