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include: Make mstatus parameter optional for get_insn()

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The mstatus parameter of get_insn() is used to return MSTATUS CSR
value which get_insn() saw. Most of the get_insn() callers don't
use the value returned in mstatus so this patch makes mstatus
parameter optional for get_insn().

Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel
2019-03-30 18:43:49 +05:30
committed by Anup Patel
parent 13877c3a67
commit 78c87cd13a
3 changed files with 8 additions and 12 deletions
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7
include/sbi/riscv_unpriv.h
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@@ -82,7 +82,7 @@ static inline ulong get_insn(ulong mepc, ulong *mstatus)
#endif
"csrw "STR(CSR_MSTATUS)", %[mstatus]"
: [mstatus] "+&r" (__mstatus), [insn] "=&r" (val)
: [mprv] "r" (MSTATUS_MPRV | MSTATUS_MXR), [addr] "r" (__mepc));
: [mprv] "r" (MSTATUS_MPRV|MSTATUS_MXR), [addr] "r" (__mepc));
#else
ulong rvc_mask = 3, tmp;
asm ("csrrs %[mstatus], "STR(CSR_MSTATUS)", %[mprv]\n"
@@ -107,10 +107,11 @@ static inline ulong get_insn(ulong mepc, ulong *mstatus)
"add %[insn], %[insn], %[tmp]\n"
"2: csrw "STR(CSR_MSTATUS)", %[mstatus]"
: [mstatus] "+&r" (__mstatus), [insn] "=&r" (val), [tmp] "=&r" (tmp)
: [mprv] "r" (MSTATUS_MPRV | MSTATUS_MXR), [addr] "r" (__mepc),
: [mprv] "r" (MSTATUS_MPRV|MSTATUS_MXR), [addr] "r" (__mepc),
[rvc_mask] "r" (rvc_mask), [xlen_minus_16] "i" (__riscv_xlen - 16));
#endif
*mstatus = __mstatus;
if (mstatus)
*mstatus = __mstatus;
return val;
}