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39 lines
762 B
C
39 lines
762 B
C
#include "ktypes.h"
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#include "csr.h"
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#ifdef TIMECMP_IN_MEMORY
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#ifndef TIMECMP_MEM_ADDR
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#error "You set TIMECMP_IN_MEMORY but did not provide a memory addres in TIMECMP_MEM_ADDR!"
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#endif
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void write_mtimecmp(uint64 mtimecmp)
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{
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uint32 lo = mtimecmp & 0xffffffff;
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uint32 hi = mtimecmp >> 32;
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__asm__ volatile (
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"li t0, %0\n"
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"sw %1, 0(t0)\n"
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"sw %2, 4(t0)" ::
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"i"(TIMECMP_MEM_ADDR), "r"(lo), "r"(hi)
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);
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}
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#else
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void write_mtimecmp(uint64 mtimecmp)
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{
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uint32 lower = mtimecmp & 0xffffffff;
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uint32 higher = mtimecmp >> 32;
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__asm__ volatile (
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"csrw %0, %2\n"
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"csrw %1, %3" ::
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"I"(CSR_MTIMECMP),"I"(CSR_MTIMECMPH),
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"r"(lower), "r"(higher)
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);
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}
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#endif
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