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- Replace casuword and casuword32 stubs with proper implementation

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This commit is contained in:
Oleksandr Tymoshenko 2009-06-28 21:01:00 +00:00
parent 28399804b4
commit fa596cbd83
1 changed files with 38 additions and 2 deletions
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40
sys/mips/mips/support.S
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@ -474,12 +474,31 @@ XLEAF(suword32)
END(suword)
/*
* XXXMIPS: ATM it's the same as casuword32, but MIPS64 will require
* own implementation
* casuword(9)
* <v0>u_long casuword(<a0>u_long *p, <a1>u_long oldval, <a2>u_long newval)
*/
ENTRY(casuword)
break
blt a0, zero, fswberr # make sure address is in user space
li v0, FSWBERR
GET_CPU_PCPU(v1)
lw v1, PC_CURPCB(v1)
sw v0, U_PCB_ONFAULT(v1)
1:
move t0, a2
ll v0, 0(a0)
bne a1, v0, 2f
nop
sc t0, 0(a0) # store word
beqz t0, 1b
nop
j 3f
nop
2:
li v0, -1
3:
sw zero, U_PCB_ONFAULT(v1)
jr ra
nop
END(casuword)
@ -490,8 +509,25 @@ END(casuword)
* <a2>uint32_t newval)
*/
ENTRY(casuword32)
break
blt a0, zero, fswberr # make sure address is in user space
li v0, FSWBERR
GET_CPU_PCPU(v1)
lw v1, PC_CURPCB(v1)
sw v0, U_PCB_ONFAULT(v1)
1:
move t0, a2
ll v0, 0(a0)
bne a1, v0, 2f
nop
sc t0, 0(a0) # store word
beqz t0, 1b
nop
j 3f
nop
2:
li v0, -1
3:
sw zero, U_PCB_ONFAULT(v1)
jr ra
nop
END(casuword32)