71 lines
1.8 KiB
C
71 lines
1.8 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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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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if (ie) {
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csrs(mstatus,CSR_MSTATUS_MIE);
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} else {
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csrc(mstatus,CSR_MSTATUS_MIE);
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}
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}
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static inline unsigned int irq_getmask(void) {
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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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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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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 */
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