71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
#ifndef __IRQ_H
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#define __IRQ_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CSR_MSTATUS_MIE 0x8
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#define CSR_IRQ_MASK 0xBC0
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#define CSR_IRQ_PENDING 0xFC0
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#define CSR_DCACHE_INFO 0xCC0
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#define csrr(reg) ({ unsigned long __tmp; \
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asm volatile ("csrr %0, " #reg : "=r"(__tmp)); \
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__tmp; })
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#define csrw(reg, val) ({ \
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if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
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asm volatile ("csrw " #reg ", %0" :: "i"(val)); \
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else \
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asm volatile ("csrw " #reg ", %0" :: "r"(val)); })
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#define csrs(reg, bit) ({ \
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if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
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asm volatile ("csrrs x0, " #reg ", %0" :: "i"(bit)); \
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else \
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asm volatile ("csrrs x0, " #reg ", %0" :: "r"(bit)); })
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#define csrc(reg, bit) ({ \
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if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
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asm volatile ("csrrc x0, " #reg ", %0" :: "i"(bit)); \
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else \
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asm volatile ("csrrc x0, " #reg ", %0" :: "r"(bit)); })
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static inline unsigned int irq_getie(void)
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{
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return (csrr(mstatus) & CSR_MSTATUS_MIE) != 0;
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}
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static inline void irq_setie(unsigned int ie)
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{
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if(ie) csrs(mstatus,CSR_MSTATUS_MIE); else csrc(mstatus,CSR_MSTATUS_MIE);
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}
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static inline unsigned int irq_getmask(void)
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{
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unsigned int mask;
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asm volatile ("csrr %0, %1" : "=r"(mask) : "i"(CSR_IRQ_MASK));
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return mask;
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}
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static inline void irq_setmask(unsigned int mask)
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{
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asm volatile ("csrw %0, %1" :: "i"(CSR_IRQ_MASK), "r"(mask));
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}
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static inline unsigned int irq_pending(void)
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{
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unsigned int pending;
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asm volatile ("csrr %0, %1" : "=r"(pending) : "i"(CSR_IRQ_PENDING));
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return pending;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __IRQ_H */ |