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Support timer interrupt pending clear in SBI #108

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Support timer interrupt pending clear in SBI #108

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1 change: 1 addition & 0 deletions machine/mcall.h
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Original file line number Diff line number Diff line change
Expand Up @@ -10,5 +10,6 @@
#define SBI_REMOTE_SFENCE_VMA 6
#define SBI_REMOTE_SFENCE_VMA_ASID 7
#define SBI_SHUTDOWN 8
#define SBI_CLEAR_TIP 9

#endif
10 changes: 9 additions & 1 deletion machine/mtrap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,11 @@ static uintptr_t mcall_clear_ipi()
return clear_csr(mip, MIP_SSIP) & MIP_SSIP;
}

static uintptr_t mcall_clear_tip()
{
return clear_csr(mip, MIP_STIP);
}

static uintptr_t mcall_shutdown()
{
poweroff(0);
Expand All @@ -87,7 +92,7 @@ static uintptr_t mcall_shutdown()
static uintptr_t mcall_set_timer(uint64_t when)
{
*HLS()->timecmp = when;
clear_csr(mip, MIP_STIP);
mcall_clear_tip();
set_csr(mie, MIP_MTIP);
return 0;
}
Expand Down Expand Up @@ -152,6 +157,9 @@ void mcall_trap(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc)
case SBI_CLEAR_IPI:
retval = mcall_clear_ipi();
break;
case SBI_CLEAR_TIP:
retval = mcall_clear_tip();
break;
case SBI_SHUTDOWN:
retval = mcall_shutdown();
break;
Expand Down