122 lines
1.9 KiB
C
122 lines
1.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SCORE_IRQFLAGS_H
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#define _ASM_SCORE_IRQFLAGS_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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static inline unsigned long arch_local_save_flags(void)
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{
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unsigned long flags;
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asm volatile(
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" mfcr r8, cr0 \n"
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" nop \n"
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" nop \n"
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" mv %0, r8 \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" ldi r9, 0x1 \n"
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" and %0, %0, r9 \n"
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: "=r" (flags)
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:
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: "r8", "r9");
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return flags;
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}
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static inline unsigned long arch_local_irq_save(void)
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{
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unsigned long flags;
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asm volatile(
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" mfcr r8, cr0 \n"
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" li r9, 0xfffffffe \n"
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" nop \n"
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" mv %0, r8 \n"
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" and r8, r8, r9 \n"
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" mtcr r8, cr0 \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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: "=r" (flags)
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:
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: "r8", "r9", "memory");
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return flags;
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}
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static inline void arch_local_irq_restore(unsigned long flags)
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{
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asm volatile(
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" mfcr r8, cr0 \n"
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" ldi r9, 0x1 \n"
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" and %0, %0, r9 \n"
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" or r8, r8, %0 \n"
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" mtcr r8, cr0 \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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:
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: "r"(flags)
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: "r8", "r9", "memory");
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}
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static inline void arch_local_irq_enable(void)
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{
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asm volatile(
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" mfcr r8,cr0 \n"
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" nop \n"
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" nop \n"
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" ori r8,0x1 \n"
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" mtcr r8,cr0 \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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:
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:
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: "r8", "memory");
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}
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static inline void arch_local_irq_disable(void)
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{
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asm volatile(
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" mfcr r8,cr0 \n"
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" nop \n"
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" nop \n"
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" srli r8,r8,1 \n"
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" slli r8,r8,1 \n"
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" mtcr r8,cr0 \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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" nop \n"
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:
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:
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: "r8", "memory");
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}
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static inline bool arch_irqs_disabled_flags(unsigned long flags)
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{
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return !(flags & 1);
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}
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static inline bool arch_irqs_disabled(void)
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{
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return arch_irqs_disabled_flags(arch_local_save_flags());
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_SCORE_IRQFLAGS_H */
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