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[SPARC64]: Do not call winfix_dax blindly 

Verify we really are taking a data access exception trap, at TL1, from
one of the window spill/fill handlers.

Else call a new function, data_access_exception_tl1, to log the error.

Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
David S. Miller 2005-08-29 12:44:57 -07:00
parent 5ea68e0276
commit bde4e4ee9f
2 changed files with 27 additions and 0 deletions
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16
arch/sparc64/kernel/entry.S
View File

@ -701,8 +701,24 @@ __do_data_access_exception_tl1:
ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
membar #Sync
rdpr %tt, %g3
cmp %g3, 0x80 ! first win spill/fill trap
blu,pn %xcc, 1f
cmp %g3, 0xff ! last win spill/fill trap
bgu,pn %xcc, 1f
nop
ba,pt %xcc, winfix_dax
rdpr %tpc, %g3
1: sethi %hi(109f), %g7
ba,pt %xcc, etraptl1
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call data_access_exception_tl1
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
__do_data_access_exception:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate

11
arch/sparc64/kernel/traps.c
View File

@ -220,6 +220,17 @@ void data_access_exception(struct pt_regs *regs,
force_sig_info(SIGSEGV, &info, current);
}
void data_access_exception_tl1(struct pt_regs *regs,
unsigned long sfsr, unsigned long sfar)
{
if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
0, 0x30, SIGTRAP) == NOTIFY_STOP)
return;
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
data_access_exception(regs, sfsr, sfar);
}
#ifdef CONFIG_PCI
/* This is really pathetic... */
extern volatile int pci_poke_in_progress;