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[SPARC64]: Revamp Spitfire error trap handling.

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Current uncorrectable error handling was poor enough
that the processor could just loop taking the same
trap over and over again.  Fix things up so that we
at least get a log message and perhaps even some register
state.

In the process, much consolidation became possible,
particularly with the correctable error handler.

Prefix assembler and C function names with "spitfire"
to indicate that these are for Ultra-I/II/IIi/IIe only.

More work is needed to make these routines robust and
featureful to the level of the Ultra-III error handlers.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2005-08-29 12:45:11 -07:00
parent bde4e4ee9f
commit 6c52a96e6c
6 changed files with 453 additions and 280 deletions
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336
arch/sparc64/kernel/entry.S
View File

@ -21,6 +21,7 @@
#include <asm/visasm.h>
#include <asm/estate.h>
#include <asm/auxio.h>
#include <asm/sfafsr.h>
#define curptr g6
@ -690,88 +691,102 @@ netbsd_syscall:
retl
nop
.globl __do_data_access_exception
.globl __do_data_access_exception_tl1
__do_data_access_exception_tl1:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
mov DMMU_SFAR, %g5
ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
/* We need to carefully read the error status, ACK
* the errors, prevent recursive traps, and pass the
* information on to C code for logging.
*
* We pass the AFAR in as-is, and we encode the status
* information as described in asm-sparc64/sfafsr.h
*/
.globl __spitfire_access_error
__spitfire_access_error:
/* Disable ESTATE error reporting so that we do not
* take recursive traps and RED state the processor.
*/
stxa %g0, [%g0] ASI_ESTATE_ERROR_EN
membar #Sync
mov UDBE_UE, %g1
ldxa [%g0] ASI_AFSR, %g4 ! Get AFSR
/* __spitfire_cee_trap branches here with AFSR in %g4 and
* UDBE_CE in %g1. It only clears ESTATE_ERR_CE in the
* ESTATE Error Enable register.
*/
__spitfire_cee_trap_continue:
ldxa [%g0] ASI_AFAR, %g5 ! Get AFAR
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
and %g3, 0x1ff, %g3 ! Paranoia
sllx %g3, SFSTAT_TRAP_TYPE_SHIFT, %g3
or %g4, %g3, %g4
rdpr %tl, %g3
cmp %g3, 1
mov 1, %g3
bleu %xcc, 1f
sllx %g3, SFSTAT_TL_GT_ONE_SHIFT, %g3
or %g4, %g3, %g4
/* Read in the UDB error register state, clearing the
* sticky error bits as-needed. We only clear them if
* the UE bit is set. Likewise, __spitfire_cee_trap
* below will only do so if the CE bit is set.
*
* NOTE: UltraSparc-I/II have high and low UDB error
* registers, corresponding to the two UDB units
* present on those chips. UltraSparc-IIi only
* has a single UDB, called "SDB" in the manual.
* For IIi the upper UDB register always reads
* as zero so for our purposes things will just
* work with the checks below.
*/
1: ldxa [%g0] ASI_UDBH_ERROR_R, %g3
and %g3, 0x3ff, %g7 ! Paranoia
sllx %g7, SFSTAT_UDBH_SHIFT, %g7
or %g4, %g7, %g4
andcc %g3, %g1, %g3 ! UDBE_UE or UDBE_CE
be,pn %xcc, 1f
nop
ba,pt %xcc, winfix_dax
rdpr %tpc, %g3
1: sethi %hi(109f), %g7
stxa %g3, [%g0] ASI_UDB_ERROR_W
membar #Sync
1: mov 0x18, %g3
ldxa [%g3] ASI_UDBL_ERROR_R, %g3
and %g3, 0x3ff, %g7 ! Paranoia
sllx %g7, SFSTAT_UDBL_SHIFT, %g7
or %g4, %g7, %g4
andcc %g3, %g1, %g3 ! UDBE_UE or UDBE_CE
be,pn %xcc, 1f
nop
mov 0x18, %g7
stxa %g3, [%g7] ASI_UDB_ERROR_W
membar #Sync
1: /* Ok, now that we've latched the error state,
* clear the sticky bits in the AFSR.
*/
stxa %g4, [%g0] ASI_AFSR
membar #Sync
rdpr %tl, %g2
cmp %g2, 1
rdpr %pil, %g2
bleu,pt %xcc, 1f
wrpr %g0, 15, %pil
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
rd %pc, %g7
__do_data_access_exception:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
mov DMMU_SFAR, %g5
ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
membar #Sync
sethi %hi(109f), %g7
ba,pt %xcc, etrap
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call data_access_exception
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
ba,pt %xcc, 2f
nop
.globl __do_instruction_access_exception
.globl __do_instruction_access_exception_tl1
__do_instruction_access_exception_tl1:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
membar #Sync
sethi %hi(109f), %g7
ba,pt %xcc, etraptl1
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call instruction_access_exception_tl1
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
1: ba,pt %xcc, etrap_irq
rd %pc, %g7
__do_instruction_access_exception:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
membar #Sync
sethi %hi(109f), %g7
ba,pt %xcc, etrap
109: or %g7, %lo(109b), %g7
mov %l4, %o1
2: mov %l4, %o1
mov %l5, %o2
call instruction_access_exception
call spitfire_access_error
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
@ -793,79 +808,124 @@ __do_instruction_access_exception:
* as it is the only situation where we can safely record
* and log. For trap level >1 we just clear the CE bit
* in the AFSR and return.
*/
/* Our trap handling infrastructure allows us to preserve
* two 64-bit values during etrap for arguments to
* subsequent C code. Therefore we encode the information
* as follows:
*
* value 1) Full 64-bits of AFAR
* value 2) Low 33-bits of AFSR, then bits 33-->42
* are UDBL error status and bits 43-->52
* are UDBH error status
* This is just like __spiftire_access_error above, but it
* specifically handles correctable errors. If an
* uncorrectable error is indicated in the AFSR we
* will branch directly above to __spitfire_access_error
* to handle it instead. Uncorrectable therefore takes
* priority over correctable, and the error logging
* C code will notice this case by inspecting the
* trap type.
*/
.align 64
.globl cee_trap
cee_trap:
ldxa [%g0] ASI_AFSR, %g1 ! Read AFSR
ldxa [%g0] ASI_AFAR, %g2 ! Read AFAR
sllx %g1, 31, %g1 ! Clear reserved bits
srlx %g1, 31, %g1 ! in AFSR
.globl __spitfire_cee_trap
__spitfire_cee_trap:
ldxa [%g0] ASI_AFSR, %g4 ! Get AFSR
mov 1, %g3
sllx %g3, SFAFSR_UE_SHIFT, %g3
andcc %g4, %g3, %g0 ! Check for UE
bne,pn %xcc, __spitfire_access_error
nop
/* NOTE: UltraSparc-I/II have high and low UDB error
* registers, corresponding to the two UDB units
* present on those chips. UltraSparc-IIi only
* has a single UDB, called "SDB" in the manual.
* For IIi the upper UDB register always reads
* as zero so for our purposes things will just
* work with the checks below.
/* Ok, in this case we only have a correctable error.
* Indicate we only wish to capture that state in register
* %g1, and we only disable CE error reporting unlike UE
* handling which disables all errors.
*/
ldxa [%g0] ASI_UDBL_ERROR_R, %g3 ! Read UDB-Low error status
andcc %g3, (1 << 8), %g4 ! Check CE bit
sllx %g3, (64 - 10), %g3 ! Clear reserved bits
srlx %g3, (64 - 10), %g3 ! in UDB-Low error status
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g3
andn %g3, ESTATE_ERR_CE, %g3
stxa %g3, [%g0] ASI_ESTATE_ERROR_EN
membar #Sync
sllx %g3, (33 + 0), %g3 ! Shift up to encoding area
or %g1, %g3, %g1 ! Or it in
be,pn %xcc, 1f ! Branch if CE bit was clear
/* Preserve AFSR in %g4, indicate UDB state to capture in %g1 */
ba,pt %xcc, __spitfire_cee_trap_continue
mov UDBE_CE, %g1
.globl __spitfire_data_access_exception
.globl __spitfire_data_access_exception_tl1
__spitfire_data_access_exception_tl1:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
mov DMMU_SFAR, %g5
ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
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
stxa %g4, [%g0] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBL
membar #Sync ! Synchronize ASI stores
1: mov 0x18, %g5 ! Addr of UDB-High error status
ldxa [%g5] ASI_UDBH_ERROR_R, %g3 ! Read it
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 spitfire_data_access_exception_tl1
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
andcc %g3, (1 << 8), %g4 ! Check CE bit
sllx %g3, (64 - 10), %g3 ! Clear reserved bits
srlx %g3, (64 - 10), %g3 ! in UDB-High error status
sllx %g3, (33 + 10), %g3 ! Shift up to encoding area
or %g1, %g3, %g1 ! Or it in
be,pn %xcc, 1f ! Branch if CE bit was clear
nop
nop
__spitfire_data_access_exception:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
mov DMMU_SFAR, %g5
ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
membar #Sync
sethi %hi(109f), %g7
ba,pt %xcc, etrap
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call spitfire_data_access_exception
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
stxa %g4, [%g5] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBH
membar #Sync ! Synchronize ASI stores
1: mov 1, %g5 ! AFSR CE bit is
sllx %g5, 20, %g5 ! bit 20
stxa %g5, [%g0] ASI_AFSR ! Clear CE sticky bit in AFSR
membar #Sync ! Synchronize ASI stores
sllx %g2, (64 - 41), %g2 ! Clear reserved bits
srlx %g2, (64 - 41), %g2 ! in latched AFAR
.globl __spitfire_insn_access_exception
.globl __spitfire_insn_access_exception_tl1
__spitfire_insn_access_exception_tl1:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
membar #Sync
sethi %hi(109f), %g7
ba,pt %xcc, etraptl1
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call spitfire_insn_access_exception_tl1
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
andn %g2, 0x0f, %g2 ! Finish resv bit clearing
mov %g1, %g4 ! Move AFSR+UDB* into save reg
mov %g2, %g5 ! Move AFAR into save reg
rdpr %pil, %g2
wrpr %g0, 15, %pil
ba,pt %xcc, etrap_irq
rd %pc, %g7
mov %l4, %o0
mov %l5, %o1
call cee_log
add %sp, PTREGS_OFF, %o2
ba,a,pt %xcc, rtrap_irq
__spitfire_insn_access_exception:
rdpr %pstate, %g4
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
mov TLB_SFSR, %g3
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
membar #Sync
sethi %hi(109f), %g7
ba,pt %xcc, etrap
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call spitfire_insn_access_exception
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6
/* Capture I/D/E-cache state into per-cpu error scoreboard.
*

264
arch/sparc64/kernel/traps.c
View File

@ -33,6 +33,7 @@
#include <asm/dcu.h>
#include <asm/estate.h>
#include <asm/chafsr.h>
#include <asm/sfafsr.h>
#include <asm/psrcompat.h>
#include <asm/processor.h>
#include <asm/timer.h>
@ -143,8 +144,7 @@ void do_BUG(const char *file, int line)
}
#endif
void instruction_access_exception(struct pt_regs *regs,
unsigned long sfsr, unsigned long sfar)
void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
{
siginfo_t info;
@ -153,8 +153,8 @@ void instruction_access_exception(struct pt_regs *regs,
return;
if (regs->tstate & TSTATE_PRIV) {
printk("instruction_access_exception: SFSR[%016lx] SFAR[%016lx], going.\n",
sfsr, sfar);
printk("spitfire_insn_access_exception: SFSR[%016lx] "
"SFAR[%016lx], going.\n", sfsr, sfar);
die_if_kernel("Iax", regs);
}
if (test_thread_flag(TIF_32BIT)) {
@ -169,19 +169,17 @@ void instruction_access_exception(struct pt_regs *regs,
force_sig_info(SIGSEGV, &info, current);
}
void instruction_access_exception_tl1(struct pt_regs *regs,
unsigned long sfsr, unsigned long sfar)
void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
{
if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
instruction_access_exception(regs, sfsr, sfar);
spitfire_insn_access_exception(regs, sfsr, sfar);
}
void data_access_exception(struct pt_regs *regs,
unsigned long sfsr, unsigned long sfar)
void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
{
siginfo_t info;
@ -207,8 +205,8 @@ void data_access_exception(struct pt_regs *regs,
return;
}
/* Shit... */
printk("data_access_exception: SFSR[%016lx] SFAR[%016lx], going.\n",
sfsr, sfar);
printk("spitfire_data_access_exception: SFSR[%016lx] "
"SFAR[%016lx], going.\n", sfsr, sfar);
die_if_kernel("Dax", regs);
}
@ -220,15 +218,14 @@ 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)
void spitfire_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);
spitfire_data_access_exception(regs, sfsr, sfar);
}
#ifdef CONFIG_PCI
@ -264,54 +261,13 @@ static void spitfire_clean_and_reenable_l1_caches(void)
: "memory");
}
void do_iae(struct pt_regs *regs)
static void spitfire_enable_estate_errors(void)
{
siginfo_t info;
spitfire_clean_and_reenable_l1_caches();
if (notify_die(DIE_TRAP, "instruction access exception", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_OBJERR;
info.si_addr = (void *)0;
info.si_trapno = 0;
force_sig_info(SIGBUS, &info, current);
}
void do_dae(struct pt_regs *regs)
{
siginfo_t info;
#ifdef CONFIG_PCI
if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
spitfire_clean_and_reenable_l1_caches();
pci_poke_faulted = 1;
/* Why the fuck did they have to change this? */
if (tlb_type == cheetah || tlb_type == cheetah_plus)
regs->tpc += 4;
regs->tnpc = regs->tpc + 4;
return;
}
#endif
spitfire_clean_and_reenable_l1_caches();
if (notify_die(DIE_TRAP, "data access exception", regs,
0, 0x30, SIGTRAP) == NOTIFY_STOP)
return;
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_OBJERR;
info.si_addr = (void *)0;
info.si_trapno = 0;
force_sig_info(SIGBUS, &info, current);
__asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
"membar #Sync"
: /* no outputs */
: "r" (ESTATE_ERR_ALL),
"i" (ASI_ESTATE_ERROR_EN));
}
static char ecc_syndrome_table[] = {
@ -349,65 +305,15 @@ static char ecc_syndrome_table[] = {
0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
};
/* cee_trap in entry.S encodes AFSR/UDBH/UDBL error status
* in the following format. The AFAR is left as is, with
* reserved bits cleared, and is a raw 40-bit physical
* address.
*/
#define CE_STATUS_UDBH_UE (1UL << (43 + 9))
#define CE_STATUS_UDBH_CE (1UL << (43 + 8))
#define CE_STATUS_UDBH_ESYNDR (0xffUL << 43)
#define CE_STATUS_UDBH_SHIFT 43
#define CE_STATUS_UDBL_UE (1UL << (33 + 9))
#define CE_STATUS_UDBL_CE (1UL << (33 + 8))
#define CE_STATUS_UDBL_ESYNDR (0xffUL << 33)
#define CE_STATUS_UDBL_SHIFT 33
#define CE_STATUS_AFSR_MASK (0x1ffffffffUL)
#define CE_STATUS_AFSR_ME (1UL << 32)
#define CE_STATUS_AFSR_PRIV (1UL << 31)
#define CE_STATUS_AFSR_ISAP (1UL << 30)
#define CE_STATUS_AFSR_ETP (1UL << 29)
#define CE_STATUS_AFSR_IVUE (1UL << 28)
#define CE_STATUS_AFSR_TO (1UL << 27)
#define CE_STATUS_AFSR_BERR (1UL << 26)
#define CE_STATUS_AFSR_LDP (1UL << 25)
#define CE_STATUS_AFSR_CP (1UL << 24)
#define CE_STATUS_AFSR_WP (1UL << 23)
#define CE_STATUS_AFSR_EDP (1UL << 22)
#define CE_STATUS_AFSR_UE (1UL << 21)
#define CE_STATUS_AFSR_CE (1UL << 20)
#define CE_STATUS_AFSR_ETS (0xfUL << 16)
#define CE_STATUS_AFSR_ETS_SHIFT 16
#define CE_STATUS_AFSR_PSYND (0xffffUL << 0)
#define CE_STATUS_AFSR_PSYND_SHIFT 0
/* Layout of Ecache TAG Parity Syndrome of AFSR */
#define AFSR_ETSYNDROME_7_0 0x1UL /* E$-tag bus bits <7:0> */
#define AFSR_ETSYNDROME_15_8 0x2UL /* E$-tag bus bits <15:8> */
#define AFSR_ETSYNDROME_21_16 0x4UL /* E$-tag bus bits <21:16> */
#define AFSR_ETSYNDROME_24_22 0x8UL /* E$-tag bus bits <24:22> */
static char *syndrome_unknown = "<Unknown>";
asmlinkage void cee_log(unsigned long ce_status,
unsigned long afar,
struct pt_regs *regs)
static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
{
char memmod_str[64];
char *p;
unsigned short scode, udb_reg;
unsigned short scode;
char memmod_str[64], *p;
printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
"AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx]\n",
smp_processor_id(),
(ce_status & CE_STATUS_AFSR_MASK),
afar,
((ce_status >> CE_STATUS_UDBL_SHIFT) & 0x3ffUL),
((ce_status >> CE_STATUS_UDBH_SHIFT) & 0x3ffUL));
udb_reg = ((ce_status >> CE_STATUS_UDBL_SHIFT) & 0x3ffUL);
if (udb_reg & (1 << 8)) {
scode = ecc_syndrome_table[udb_reg & 0xff];
if (udbl & bit) {
scode = ecc_syndrome_table[udbl & 0xff];
if (prom_getunumber(scode, afar,
memmod_str, sizeof(memmod_str)) == -1)
p = syndrome_unknown;
@ -418,9 +324,8 @@ asmlinkage void cee_log(unsigned long ce_status,
smp_processor_id(), scode, p);
}
udb_reg = ((ce_status >> CE_STATUS_UDBH_SHIFT) & 0x3ffUL);
if (udb_reg & (1 << 8)) {
scode = ecc_syndrome_table[udb_reg & 0xff];
if (udbh & bit) {
scode = ecc_syndrome_table[udbh & 0xff];
if (prom_getunumber(scode, afar,
memmod_str, sizeof(memmod_str)) == -1)
p = syndrome_unknown;
@ -430,6 +335,127 @@ asmlinkage void cee_log(unsigned long ce_status,
"Memory Module \"%s\"\n",
smp_processor_id(), scode, p);
}
}
static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
{
printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
"AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
smp_processor_id(), afsr, afar, udbl, udbh, tl1);
spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
/* We always log it, even if someone is listening for this
* trap.
*/
notify_die(DIE_TRAP, "Correctable ECC Error", regs,
0, TRAP_TYPE_CEE, SIGTRAP);
/* The Correctable ECC Error trap does not disable I/D caches. So
* we only have to restore the ESTATE Error Enable register.
*/
spitfire_enable_estate_errors();
}
static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long tt, int tl1, struct pt_regs *regs)
{
siginfo_t info;
printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
"AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
/* XXX add more human friendly logging of the error status
* XXX as is implemented for cheetah
*/
spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
/* We always log it, even if someone is listening for this
* trap.
*/
notify_die(DIE_TRAP, "Uncorrectable Error", regs,
0, tt, SIGTRAP);
if (regs->tstate & TSTATE_PRIV) {
if (tl1)
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("UE", regs);
}
/* XXX need more intelligent processing here, such as is implemented
* XXX for cheetah errors, in fact if the E-cache still holds the
* XXX line with bad parity this will loop
*/
spitfire_clean_and_reenable_l1_caches();
spitfire_enable_estate_errors();
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_OBJERR;
info.si_addr = (void *)0;
info.si_trapno = 0;
force_sig_info(SIGBUS, &info, current);
}
void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
{
unsigned long afsr, tt, udbh, udbl;
int tl1;
afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
#ifdef CONFIG_PCI
if (tt == TRAP_TYPE_DAE &&
pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
spitfire_clean_and_reenable_l1_caches();
spitfire_enable_estate_errors();
pci_poke_faulted = 1;
regs->tnpc = regs->tpc + 4;
return;
}
#endif
if (afsr & SFAFSR_UE)
spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
if (tt == TRAP_TYPE_CEE) {
/* Handle the case where we took a CEE trap, but ACK'd
* only the UE state in the UDB error registers.
*/
if (afsr & SFAFSR_UE) {
if (udbh & UDBE_CE) {
__asm__ __volatile__(
"stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* no outputs */
: "r" (udbh & UDBE_CE),
"r" (0x0), "i" (ASI_UDB_ERROR_W));
}
if (udbl & UDBE_CE) {
__asm__ __volatile__(
"stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* no outputs */
: "r" (udbl & UDBE_CE),
"r" (0x18), "i" (ASI_UDB_ERROR_W));
}
}
spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
}
}
int cheetah_pcache_forced_on;

27
arch/sparc64/kernel/ttable.S
View File

@ -18,9 +18,10 @@ sparc64_ttable_tl0:
tl0_resv000: BOOT_KERNEL BTRAP(0x1) BTRAP(0x2) BTRAP(0x3)
tl0_resv004: BTRAP(0x4) BTRAP(0x5) BTRAP(0x6) BTRAP(0x7)
tl0_iax: membar #Sync
TRAP_NOSAVE_7INSNS(__do_instruction_access_exception)
TRAP_NOSAVE_7INSNS(__spitfire_insn_access_exception)
tl0_resv009: BTRAP(0x9)
tl0_iae: TRAP(do_iae)
tl0_iae: membar #Sync
TRAP_NOSAVE_7INSNS(__spitfire_access_error)
tl0_resv00b: BTRAP(0xb) BTRAP(0xc) BTRAP(0xd) BTRAP(0xe) BTRAP(0xf)
tl0_ill: membar #Sync
TRAP_7INSNS(do_illegal_instruction)
@ -36,9 +37,10 @@ tl0_cwin: CLEAN_WINDOW
tl0_div0: TRAP(do_div0)
tl0_resv029: BTRAP(0x29) BTRAP(0x2a) BTRAP(0x2b) BTRAP(0x2c) BTRAP(0x2d) BTRAP(0x2e)
tl0_resv02f: BTRAP(0x2f)
tl0_dax: TRAP_NOSAVE(__do_data_access_exception)
tl0_dax: TRAP_NOSAVE(__spitfire_data_access_exception)
tl0_resv031: BTRAP(0x31)
tl0_dae: TRAP(do_dae)
tl0_dae: membar #Sync
TRAP_NOSAVE_7INSNS(__spitfire_access_error)
tl0_resv033: BTRAP(0x33)
tl0_mna: TRAP_NOSAVE(do_mna)
tl0_lddfmna: TRAP_NOSAVE(do_lddfmna)
@ -73,7 +75,8 @@ tl0_resv05c: BTRAP(0x5c) BTRAP(0x5d) BTRAP(0x5e) BTRAP(0x5f)
tl0_ivec: TRAP_IVEC
tl0_paw: TRAP(do_paw)
tl0_vaw: TRAP(do_vaw)
tl0_cee: TRAP_NOSAVE(cee_trap)
tl0_cee: membar #Sync
TRAP_NOSAVE_7INSNS(__spitfire_cee_trap)
tl0_iamiss:
#include "itlb_base.S"
tl0_damiss:
@ -175,9 +178,10 @@ tl0_resv1f0: BTRAPS(0x1f0) BTRAPS(0x1f8)
sparc64_ttable_tl1:
tl1_resv000: BOOT_KERNEL BTRAPTL1(0x1) BTRAPTL1(0x2) BTRAPTL1(0x3)
tl1_resv004: BTRAPTL1(0x4) BTRAPTL1(0x5) BTRAPTL1(0x6) BTRAPTL1(0x7)
tl1_iax: TRAP_NOSAVE(__do_instruction_access_exception_tl1)
tl1_iax: TRAP_NOSAVE(__spitfire_insn_access_exception_tl1)
tl1_resv009: BTRAPTL1(0x9)
tl1_iae: TRAPTL1(do_iae_tl1)
tl1_iae: membar #Sync
TRAP_NOSAVE_7INSNS(__spitfire_access_error)
tl1_resv00b: BTRAPTL1(0xb) BTRAPTL1(0xc) BTRAPTL1(0xd) BTRAPTL1(0xe) BTRAPTL1(0xf)
tl1_ill: TRAPTL1(do_ill_tl1)
tl1_privop: BTRAPTL1(0x11)
@ -193,9 +197,10 @@ tl1_cwin: CLEAN_WINDOW
tl1_div0: TRAPTL1(do_div0_tl1)
tl1_resv029: BTRAPTL1(0x29) BTRAPTL1(0x2a) BTRAPTL1(0x2b) BTRAPTL1(0x2c)
tl1_resv02d: BTRAPTL1(0x2d) BTRAPTL1(0x2e) BTRAPTL1(0x2f)
tl1_dax: TRAP_NOSAVE(__do_data_access_exception_tl1)
tl1_dax: TRAP_NOSAVE(__spitfire_data_access_exception_tl1)
tl1_resv031: BTRAPTL1(0x31)
tl1_dae: TRAPTL1(do_dae_tl1)
tl1_dae: membar #Sync
TRAP_NOSAVE_7INSNS(__spitfire_access_error)
tl1_resv033: BTRAPTL1(0x33)
tl1_mna: TRAP_NOSAVE(do_mna)
tl1_lddfmna: TRAPTL1(do_lddfmna_tl1)
@ -219,8 +224,8 @@ tl1_paw: TRAPTL1(do_paw_tl1)
tl1_vaw: TRAPTL1(do_vaw_tl1)
/* The grotty trick to save %g1 into current->thread.cee_stuff
* is because when we take this trap we could be interrupting trap
* code already using the trap alternate global registers.
* is because when we take this trap we could be interrupting
* trap code already using the trap alternate global registers.
*
* We cross our fingers and pray that this store/load does
* not cause yet another CEE trap.

18
arch/sparc64/kernel/unaligned.c
View File

@ -349,9 +349,9 @@ int handle_popc(u32 insn, struct pt_regs *regs)
extern void do_fpother(struct pt_regs *regs);
extern void do_privact(struct pt_regs *regs);
extern void data_access_exception(struct pt_regs *regs,
unsigned long sfsr,
unsigned long sfar);
extern void spitfire_data_access_exception(struct pt_regs *regs,
unsigned long sfsr,
unsigned long sfar);
int handle_ldf_stq(u32 insn, struct pt_regs *regs)
{
@ -394,14 +394,14 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
break;
}
default:
data_access_exception(regs, 0, addr);
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
if (put_user (first >> 32, (u32 __user *)addr) ||
__put_user ((u32)first, (u32 __user *)(addr + 4)) ||
__put_user (second >> 32, (u32 __user *)(addr + 8)) ||
__put_user ((u32)second, (u32 __user *)(addr + 12))) {
data_access_exception(regs, 0, addr);
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
} else {
@ -414,7 +414,7 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
do_privact(regs);
return 1;
} else if (asi > ASI_SNFL) {
data_access_exception(regs, 0, addr);
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
switch (insn & 0x180000) {
@ -431,7 +431,7 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
err |= __get_user (data[i], (u32 __user *)(addr + 4*i));
}
if (err && !(asi & 0x2 /* NF */)) {
data_access_exception(regs, 0, addr);
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
if (asi & 0x8) /* Little */ {
@ -534,7 +534,7 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
*(u64 *)(f->regs + freg) = value;
current_thread_info()->fpsaved[0] |= flag;
} else {
daex: data_access_exception(regs, sfsr, sfar);
daex: spitfire_data_access_exception(regs, sfsr, sfar);
return;
}
advance(regs);
@ -578,7 +578,7 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
__put_user ((u32)value, (u32 __user *)(sfar + 4)))
goto daex;
} else {
daex: data_access_exception(regs, sfsr, sfar);
daex: spitfire_data_access_exception(regs, sfsr, sfar);
return;
}
advance(regs);

6
arch/sparc64/kernel/winfixup.S
View File

@ -318,7 +318,7 @@ fill_fixup_dax:
nop
rdpr %pstate, %l1 ! Prepare to change globals.
mov %g4, %o1 ! Setup args for
mov %g5, %o2 ! final call to data_access_exception.
mov %g5, %o2 ! final call to spitfire_data_access_exception.
andn %l1, PSTATE_MM, %l1 ! We want to be in RMO
mov %g6, %o7 ! Stash away current.
@ -330,7 +330,7 @@ fill_fixup_dax:
mov TSB_REG, %g1
ldxa [%g1] ASI_IMMU, %g5
#endif
call data_access_exception
call spitfire_data_access_exception
add %sp, PTREGS_OFF, %o0
b,pt %xcc, rtrap
@ -391,7 +391,7 @@ window_dax_from_user_common:
109: or %g7, %lo(109b), %g7
mov %l4, %o1
mov %l5, %o2
call data_access_exception
call spitfire_data_access_exception
add %sp, PTREGS_OFF, %o0
ba,pt %xcc, rtrap
clr %l6

82
include/asm-sparc64/sfafsr.h Normal file
View File

@ -0,0 +1,82 @@
#ifndef _SPARC64_SFAFSR_H
#define _SPARC64_SFAFSR_H
#include <asm/const.h>
/* Spitfire Asynchronous Fault Status register, ASI=0x4C VA<63:0>=0x0 */
#define SFAFSR_ME (_AC(1,UL) << SFAFSR_ME_SHIFT)
#define SFAFSR_ME_SHIFT 32
#define SFAFSR_PRIV (_AC(1,UL) << SFAFSR_PRIV_SHIFT)
#define SFAFSR_PRIV_SHIFT 31
#define SFAFSR_ISAP (_AC(1,UL) << SFAFSR_ISAP_SHIFT)
#define SFAFSR_ISAP_SHIFT 30
#define SFAFSR_ETP (_AC(1,UL) << SFAFSR_ETP_SHIFT)
#define SFAFSR_ETP_SHIFT 29
#define SFAFSR_IVUE (_AC(1,UL) << SFAFSR_IVUE_SHIFT)
#define SFAFSR_IVUE_SHIFT 28
#define SFAFSR_TO (_AC(1,UL) << SFAFSR_TO_SHIFT)
#define SFAFSR_TO_SHIFT 27
#define SFAFSR_BERR (_AC(1,UL) << SFAFSR_BERR_SHIFT)
#define SFAFSR_BERR_SHIFT 26
#define SFAFSR_LDP (_AC(1,UL) << SFAFSR_LDP_SHIFT)
#define SFAFSR_LDP_SHIFT 25
#define SFAFSR_CP (_AC(1,UL) << SFAFSR_CP_SHIFT)
#define SFAFSR_CP_SHIFT 24
#define SFAFSR_WP (_AC(1,UL) << SFAFSR_WP_SHIFT)
#define SFAFSR_WP_SHIFT 23
#define SFAFSR_EDP (_AC(1,UL) << SFAFSR_EDP_SHIFT)
#define SFAFSR_EDP_SHIFT 22
#define SFAFSR_UE (_AC(1,UL) << SFAFSR_UE_SHIFT)
#define SFAFSR_UE_SHIFT 21
#define SFAFSR_CE (_AC(1,UL) << SFAFSR_CE_SHIFT)
#define SFAFSR_CE_SHIFT 20
#define SFAFSR_ETS (_AC(0xf,UL) << SFAFSR_ETS_SHIFT)
#define SFAFSR_ETS_SHIFT 16
#define SFAFSR_PSYND (_AC(0xffff,UL) << SFAFSR_PSYND_SHIFT)
#define SFAFSR_PSYND_SHIFT 0
/* UDB Error Register, ASI=0x7f VA<63:0>=0x0(High),0x18(Low) for read
* ASI=0x77 VA<63:0>=0x0(High),0x18(Low) for write
*/
#define UDBE_UE (_AC(1,UL) << 9)
#define UDBE_CE (_AC(1,UL) << 8)
#define UDBE_E_SYNDR (_AC(0xff,UL) << 0)
/* The trap handlers for asynchronous errors encode the AFSR and
* other pieces of information into a 64-bit argument for C code
* encoded as follows:
*
* -----------------------------------------------
* | UDB_H | UDB_L | TL>1 | TT | AFSR |
* -----------------------------------------------
* 63 54 53 44 42 41 33 32 0
*
* The AFAR is passed in unchanged.
*/
#define SFSTAT_UDBH_MASK (_AC(0x3ff,UL) << SFSTAT_UDBH_SHIFT)
#define SFSTAT_UDBH_SHIFT 54
#define SFSTAT_UDBL_MASK (_AC(0x3ff,UL) << SFSTAT_UDBH_SHIFT)
#define SFSTAT_UDBL_SHIFT 44
#define SFSTAT_TL_GT_ONE (_AC(1,UL) << SFSTAT_TL_GT_ONE_SHIFT)
#define SFSTAT_TL_GT_ONE_SHIFT 42
#define SFSTAT_TRAP_TYPE (_AC(0x1FF,UL) << SFSTAT_TRAP_TYPE_SHIFT)
#define SFSTAT_TRAP_TYPE_SHIFT 33
#define SFSTAT_AFSR_MASK (_AC(0x1ffffffff,UL) << SFSTAT_AFSR_SHIFT)
#define SFSTAT_AFSR_SHIFT 0
/* ESTATE Error Enable Register, ASI=0x4b VA<63:0>=0x0 */
#define ESTATE_ERR_CE 0x1 /* Correctable errors */
#define ESTATE_ERR_NCE 0x2 /* TO, BERR, LDP, ETP, EDP, WP, UE, IVUE */
#define ESTATE_ERR_ISAP 0x4 /* System address parity error */
#define ESTATE_ERR_ALL (ESTATE_ERR_CE | \
ESTATE_ERR_NCE | \
ESTATE_ERR_ISAP)
/* The various trap types that report using the above state. */
#define TRAP_TYPE_IAE 0x09 /* Instruction Access Error */
#define TRAP_TYPE_DAE 0x32 /* Data Access Error */
#define TRAP_TYPE_CEE 0x63 /* Correctable ECC Error */
#endif /* _SPARC64_SFAFSR_H */