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linux/arch/sparc64/kernel/cherrs.S
David S. Miller 6eda3a7592 sparc64: Split entry.S up into seperate files. 
entry.S was a hodge-podge of several totally unrelated
sets of assembler routines, ranging from FPU trap handlers
to hypervisor call functions.

Split it up into topic-sized pieces.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-28 00:47:20 -07:00

580 lines
15 KiB
ArmAsm
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/* These get patched into the trap table at boot time
* once we know we have a cheetah processor.
*/
.globl cheetah_fecc_trap_vector
.type cheetah_fecc_trap_vector,#function
cheetah_fecc_trap_vector:
membar #Sync
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
andn %g1, DCU_DC | DCU_IC, %g1
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
membar #Sync
sethi %hi(cheetah_fast_ecc), %g2
jmpl %g2 + %lo(cheetah_fast_ecc), %g0
mov 0, %g1
.size cheetah_fecc_trap_vector,.-cheetah_fecc_trap_vector
.globl cheetah_fecc_trap_vector_tl1
.type cheetah_fecc_trap_vector_tl1,#function
cheetah_fecc_trap_vector_tl1:
membar #Sync
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
andn %g1, DCU_DC | DCU_IC, %g1
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
membar #Sync
sethi %hi(cheetah_fast_ecc), %g2
jmpl %g2 + %lo(cheetah_fast_ecc), %g0
mov 1, %g1
.size cheetah_fecc_trap_vector_tl1,.-cheetah_fecc_trap_vector_tl1
.globl cheetah_cee_trap_vector
.type cheetah_cee_trap_vector,#function
cheetah_cee_trap_vector:
membar #Sync
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
andn %g1, DCU_IC, %g1
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
membar #Sync
sethi %hi(cheetah_cee), %g2
jmpl %g2 + %lo(cheetah_cee), %g0
mov 0, %g1
.size cheetah_cee_trap_vector,.-cheetah_cee_trap_vector
.globl cheetah_cee_trap_vector_tl1
.type cheetah_cee_trap_vector_tl1,#function
cheetah_cee_trap_vector_tl1:
membar #Sync
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
andn %g1, DCU_IC, %g1
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
membar #Sync
sethi %hi(cheetah_cee), %g2
jmpl %g2 + %lo(cheetah_cee), %g0
mov 1, %g1
.size cheetah_cee_trap_vector_tl1,.-cheetah_cee_trap_vector_tl1
.globl cheetah_deferred_trap_vector
.type cheetah_deferred_trap_vector,#function
cheetah_deferred_trap_vector:
membar #Sync
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
andn %g1, DCU_DC | DCU_IC, %g1;
stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
membar #Sync;
sethi %hi(cheetah_deferred_trap), %g2
jmpl %g2 + %lo(cheetah_deferred_trap), %g0
mov 0, %g1
.size cheetah_deferred_trap_vector,.-cheetah_deferred_trap_vector
.globl cheetah_deferred_trap_vector_tl1
.type cheetah_deferred_trap_vector_tl1,#function
cheetah_deferred_trap_vector_tl1:
membar #Sync;
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
andn %g1, DCU_DC | DCU_IC, %g1;
stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
membar #Sync;
sethi %hi(cheetah_deferred_trap), %g2
jmpl %g2 + %lo(cheetah_deferred_trap), %g0
mov 1, %g1
.size cheetah_deferred_trap_vector_tl1,.-cheetah_deferred_trap_vector_tl1
/* Cheetah+ specific traps. These are for the new I/D cache parity
* error traps. The first argument to cheetah_plus_parity_handler
* is encoded as follows:
*
* Bit0: 0=dcache,1=icache
* Bit1: 0=recoverable,1=unrecoverable
*/
.globl cheetah_plus_dcpe_trap_vector
.type cheetah_plus_dcpe_trap_vector,#function
cheetah_plus_dcpe_trap_vector:
membar #Sync
sethi %hi(do_cheetah_plus_data_parity), %g7
jmpl %g7 + %lo(do_cheetah_plus_data_parity), %g0
nop
nop
nop
nop
nop
.size cheetah_plus_dcpe_trap_vector,.-cheetah_plus_dcpe_trap_vector
.type do_cheetah_plus_data_parity,#function
do_cheetah_plus_data_parity:
rdpr %pil, %g2
wrpr %g0, 15, %pil
ba,pt %xcc, etrap_irq
rd %pc, %g7
#ifdef CONFIG_TRACE_IRQFLAGS
call trace_hardirqs_off
nop
#endif
mov 0x0, %o0
call cheetah_plus_parity_error
add %sp, PTREGS_OFF, %o1
ba,a,pt %xcc, rtrap_irq
.size do_cheetah_plus_data_parity,.-do_cheetah_plus_data_parity
.globl cheetah_plus_dcpe_trap_vector_tl1
.type cheetah_plus_dcpe_trap_vector_tl1,#function
cheetah_plus_dcpe_trap_vector_tl1:
membar #Sync
wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
sethi %hi(do_dcpe_tl1), %g3
jmpl %g3 + %lo(do_dcpe_tl1), %g0
nop
nop
nop
nop
.size cheetah_plus_dcpe_trap_vector_tl1,.-cheetah_plus_dcpe_trap_vector_tl1
.globl cheetah_plus_icpe_trap_vector
.type cheetah_plus_icpe_trap_vector,#function
cheetah_plus_icpe_trap_vector:
membar #Sync
sethi %hi(do_cheetah_plus_insn_parity), %g7
jmpl %g7 + %lo(do_cheetah_plus_insn_parity), %g0
nop
nop
nop
nop
nop
.size cheetah_plus_icpe_trap_vector,.-cheetah_plus_icpe_trap_vector
.type do_cheetah_plus_insn_parity,#function
do_cheetah_plus_insn_parity:
rdpr %pil, %g2
wrpr %g0, 15, %pil
ba,pt %xcc, etrap_irq
rd %pc, %g7
#ifdef CONFIG_TRACE_IRQFLAGS
call trace_hardirqs_off
nop
#endif
mov 0x1, %o0
call cheetah_plus_parity_error
add %sp, PTREGS_OFF, %o1
ba,a,pt %xcc, rtrap_irq
.size do_cheetah_plus_insn_parity,.-do_cheetah_plus_insn_parity
.globl cheetah_plus_icpe_trap_vector_tl1
.type cheetah_plus_icpe_trap_vector_tl1,#function
cheetah_plus_icpe_trap_vector_tl1:
membar #Sync
wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
sethi %hi(do_icpe_tl1), %g3
jmpl %g3 + %lo(do_icpe_tl1), %g0
nop
nop
nop
nop
.size cheetah_plus_icpe_trap_vector_tl1,.-cheetah_plus_icpe_trap_vector_tl1
/* If we take one of these traps when tl >= 1, then we
* jump to interrupt globals. If some trap level above us
* was also using interrupt globals, we cannot recover.
* We may use all interrupt global registers except %g6.
*/
.globl do_dcpe_tl1
.type do_dcpe_tl1,#function
do_dcpe_tl1:
rdpr %tl, %g1 ! Save original trap level
mov 1, %g2 ! Setup TSTATE checking loop
sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
1: wrpr %g2, %tl ! Set trap level to check
rdpr %tstate, %g4 ! Read TSTATE for this level
andcc %g4, %g3, %g0 ! Interrupt globals in use?
bne,a,pn %xcc, do_dcpe_tl1_fatal ! Yep, irrecoverable
wrpr %g1, %tl ! Restore original trap level
add %g2, 1, %g2 ! Next trap level
cmp %g2, %g1 ! Hit them all yet?
ble,pt %icc, 1b ! Not yet
nop
wrpr %g1, %tl ! Restore original trap level
do_dcpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
sethi %hi(dcache_parity_tl1_occurred), %g2
lduw [%g2 + %lo(dcache_parity_tl1_occurred)], %g1
add %g1, 1, %g1
stw %g1, [%g2 + %lo(dcache_parity_tl1_occurred)]
/* Reset D-cache parity */
sethi %hi(1 << 16), %g1 ! D-cache size
mov (1 << 5), %g2 ! D-cache line size
sub %g1, %g2, %g1 ! Move down 1 cacheline
1: srl %g1, 14, %g3 ! Compute UTAG
membar #Sync
stxa %g3, [%g1] ASI_DCACHE_UTAG
membar #Sync
sub %g2, 8, %g3 ! 64-bit data word within line
2: membar #Sync
stxa %g0, [%g1 + %g3] ASI_DCACHE_DATA
membar #Sync
subcc %g3, 8, %g3 ! Next 64-bit data word
bge,pt %icc, 2b
nop
subcc %g1, %g2, %g1 ! Next cacheline
bge,pt %icc, 1b
nop
ba,pt %xcc, dcpe_icpe_tl1_common
nop
do_dcpe_tl1_fatal:
sethi %hi(1f), %g7
ba,pt %xcc, etraptl1
1: or %g7, %lo(1b), %g7
mov 0x2, %o0
call cheetah_plus_parity_error
add %sp, PTREGS_OFF, %o1
ba,pt %xcc, rtrap
nop
.size do_dcpe_tl1,.-do_dcpe_tl1
.globl do_icpe_tl1
.type do_icpe_tl1,#function
do_icpe_tl1:
rdpr %tl, %g1 ! Save original trap level
mov 1, %g2 ! Setup TSTATE checking loop
sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
1: wrpr %g2, %tl ! Set trap level to check
rdpr %tstate, %g4 ! Read TSTATE for this level
andcc %g4, %g3, %g0 ! Interrupt globals in use?
bne,a,pn %xcc, do_icpe_tl1_fatal ! Yep, irrecoverable
wrpr %g1, %tl ! Restore original trap level
add %g2, 1, %g2 ! Next trap level
cmp %g2, %g1 ! Hit them all yet?
ble,pt %icc, 1b ! Not yet
nop
wrpr %g1, %tl ! Restore original trap level
do_icpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
sethi %hi(icache_parity_tl1_occurred), %g2
lduw [%g2 + %lo(icache_parity_tl1_occurred)], %g1
add %g1, 1, %g1
stw %g1, [%g2 + %lo(icache_parity_tl1_occurred)]
/* Flush I-cache */
sethi %hi(1 << 15), %g1 ! I-cache size
mov (1 << 5), %g2 ! I-cache line size
sub %g1, %g2, %g1
1: or %g1, (2 << 3), %g3
stxa %g0, [%g3] ASI_IC_TAG
membar #Sync
subcc %g1, %g2, %g1
bge,pt %icc, 1b
nop
ba,pt %xcc, dcpe_icpe_tl1_common
nop
do_icpe_tl1_fatal:
sethi %hi(1f), %g7
ba,pt %xcc, etraptl1
1: or %g7, %lo(1b), %g7
mov 0x3, %o0
call cheetah_plus_parity_error
add %sp, PTREGS_OFF, %o1
ba,pt %xcc, rtrap
nop
.size do_icpe_tl1,.-do_icpe_tl1
.type dcpe_icpe_tl1_common,#function
dcpe_icpe_tl1_common:
/* Flush D-cache, re-enable D/I caches in DCU and finally
* retry the trapping instruction.
*/
sethi %hi(1 << 16), %g1 ! D-cache size
mov (1 << 5), %g2 ! D-cache line size
sub %g1, %g2, %g1
1: stxa %g0, [%g1] ASI_DCACHE_TAG
membar #Sync
subcc %g1, %g2, %g1
bge,pt %icc, 1b
nop
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
or %g1, (DCU_DC | DCU_IC), %g1
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
membar #Sync
retry
.size dcpe_icpe_tl1_common,.-dcpe_icpe_tl1_common
/* Capture I/D/E-cache state into per-cpu error scoreboard.
*
* %g1: (TL>=0) ? 1 : 0
* %g2: scratch
* %g3: scratch
* %g4: AFSR
* %g5: AFAR
* %g6: unused, will have current thread ptr after etrap
* %g7: scratch
*/
.type __cheetah_log_error,#function
__cheetah_log_error:
/* Put "TL1" software bit into AFSR. */
and %g1, 0x1, %g1
sllx %g1, 63, %g2
or %g4, %g2, %g4
/* Get log entry pointer for this cpu at this trap level. */
BRANCH_IF_JALAPENO(g2,g3,50f)
ldxa [%g0] ASI_SAFARI_CONFIG, %g2
srlx %g2, 17, %g2
ba,pt %xcc, 60f
and %g2, 0x3ff, %g2
50: ldxa [%g0] ASI_JBUS_CONFIG, %g2
srlx %g2, 17, %g2
and %g2, 0x1f, %g2
60: sllx %g2, 9, %g2
sethi %hi(cheetah_error_log), %g3
ldx [%g3 + %lo(cheetah_error_log)], %g3
brz,pn %g3, 80f
nop
add %g3, %g2, %g3
sllx %g1, 8, %g1
add %g3, %g1, %g1
/* %g1 holds pointer to the top of the logging scoreboard */
ldx [%g1 + 0x0], %g7
cmp %g7, -1
bne,pn %xcc, 80f
nop
stx %g4, [%g1 + 0x0]
stx %g5, [%g1 + 0x8]
add %g1, 0x10, %g1
/* %g1 now points to D-cache logging area */
set 0x3ff8, %g2 /* DC_addr mask */
and %g5, %g2, %g2 /* DC_addr bits of AFAR */
srlx %g5, 12, %g3
or %g3, 1, %g3 /* PHYS tag + valid */
10: ldxa [%g2] ASI_DCACHE_TAG, %g7
cmp %g3, %g7 /* TAG match? */
bne,pt %xcc, 13f
nop
/* Yep, what we want, capture state. */
stx %g2, [%g1 + 0x20]
stx %g7, [%g1 + 0x28]
/* A membar Sync is required before and after utag access. */
membar #Sync
ldxa [%g2] ASI_DCACHE_UTAG, %g7
membar #Sync
stx %g7, [%g1 + 0x30]
ldxa [%g2] ASI_DCACHE_SNOOP_TAG, %g7
stx %g7, [%g1 + 0x38]
clr %g3
12: ldxa [%g2 + %g3] ASI_DCACHE_DATA, %g7
stx %g7, [%g1]
add %g3, (1 << 5), %g3
cmp %g3, (4 << 5)
bl,pt %xcc, 12b
add %g1, 0x8, %g1
ba,pt %xcc, 20f
add %g1, 0x20, %g1
13: sethi %hi(1 << 14), %g7
add %g2, %g7, %g2
srlx %g2, 14, %g7
cmp %g7, 4
bl,pt %xcc, 10b
nop
add %g1, 0x40, %g1
/* %g1 now points to I-cache logging area */
20: set 0x1fe0, %g2 /* IC_addr mask */
and %g5, %g2, %g2 /* IC_addr bits of AFAR */
sllx %g2, 1, %g2 /* IC_addr[13:6]==VA[12:5] */
srlx %g5, (13 - 8), %g3 /* Make PTAG */
andn %g3, 0xff, %g3 /* Mask off undefined bits */
21: ldxa [%g2] ASI_IC_TAG, %g7
andn %g7, 0xff, %g7
cmp %g3, %g7
bne,pt %xcc, 23f
nop
/* Yep, what we want, capture state. */
stx %g2, [%g1 + 0x40]
stx %g7, [%g1 + 0x48]
add %g2, (1 << 3), %g2
ldxa [%g2] ASI_IC_TAG, %g7
add %g2, (1 << 3), %g2
stx %g7, [%g1 + 0x50]
ldxa [%g2] ASI_IC_TAG, %g7
add %g2, (1 << 3), %g2
stx %g7, [%g1 + 0x60]
ldxa [%g2] ASI_IC_TAG, %g7
stx %g7, [%g1 + 0x68]
sub %g2, (3 << 3), %g2
ldxa [%g2] ASI_IC_STAG, %g7
stx %g7, [%g1 + 0x58]
clr %g3
srlx %g2, 2, %g2
22: ldxa [%g2 + %g3] ASI_IC_INSTR, %g7
stx %g7, [%g1]
add %g3, (1 << 3), %g3
cmp %g3, (8 << 3)
bl,pt %xcc, 22b
add %g1, 0x8, %g1
ba,pt %xcc, 30f
add %g1, 0x30, %g1
23: sethi %hi(1 << 14), %g7
add %g2, %g7, %g2
srlx %g2, 14, %g7
cmp %g7, 4
bl,pt %xcc, 21b
nop
add %g1, 0x70, %g1
/* %g1 now points to E-cache logging area */
30: andn %g5, (32 - 1), %g2
stx %g2, [%g1 + 0x20]
ldxa [%g2] ASI_EC_TAG_DATA, %g7
stx %g7, [%g1 + 0x28]
ldxa [%g2] ASI_EC_R, %g0
clr %g3
31: ldxa [%g3] ASI_EC_DATA, %g7
stx %g7, [%g1 + %g3]
add %g3, 0x8, %g3
cmp %g3, 0x20
bl,pt %xcc, 31b
nop
80:
rdpr %tt, %g2
cmp %g2, 0x70
be c_fast_ecc
cmp %g2, 0x63
be c_cee
nop
ba,pt %xcc, c_deferred
.size __cheetah_log_error,.-__cheetah_log_error
/* Cheetah FECC trap handling, we get here from tl{0,1}_fecc
* in the trap table. That code has done a memory barrier
* and has disabled both the I-cache and D-cache in the DCU
* control register. The I-cache is disabled so that we may
* capture the corrupted cache line, and the D-cache is disabled
* because corrupt data may have been placed there and we don't
* want to reference it.
*
* %g1 is one if this trap occurred at %tl >= 1.
*
* Next, we turn off error reporting so that we don't recurse.
*/
.globl cheetah_fast_ecc
.type cheetah_fast_ecc,#function
cheetah_fast_ecc:
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
membar #Sync
/* Fetch and clear AFSR/AFAR */
ldxa [%g0] ASI_AFSR, %g4
ldxa [%g0] ASI_AFAR, %g5
stxa %g4, [%g0] ASI_AFSR
membar #Sync
ba,pt %xcc, __cheetah_log_error
nop
.size cheetah_fast_ecc,.-cheetah_fast_ecc
.type c_fast_ecc,#function
c_fast_ecc:
rdpr %pil, %g2
wrpr %g0, 15, %pil
ba,pt %xcc, etrap_irq
rd %pc, %g7
#ifdef CONFIG_TRACE_IRQFLAGS
call trace_hardirqs_off
nop
#endif
mov %l4, %o1
mov %l5, %o2
call cheetah_fecc_handler
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_irq
.size c_fast_ecc,.-c_fast_ecc
/* Our caller has disabled I-cache and performed membar Sync. */
.globl cheetah_cee
.type cheetah_cee,#function
cheetah_cee:
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
andn %g2, ESTATE_ERROR_CEEN, %g2
stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
membar #Sync
/* Fetch and clear AFSR/AFAR */
ldxa [%g0] ASI_AFSR, %g4
ldxa [%g0] ASI_AFAR, %g5
stxa %g4, [%g0] ASI_AFSR
membar #Sync
ba,pt %xcc, __cheetah_log_error
nop
.size cheetah_cee,.-cheetah_cee
.type c_cee,#function
c_cee:
rdpr %pil, %g2
wrpr %g0, 15, %pil
ba,pt %xcc, etrap_irq
rd %pc, %g7
#ifdef CONFIG_TRACE_IRQFLAGS
call trace_hardirqs_off
nop
#endif
mov %l4, %o1
mov %l5, %o2
call cheetah_cee_handler
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_irq
.size c_cee,.-c_cee
/* Our caller has disabled I-cache+D-cache and performed membar Sync. */
.globl cheetah_deferred_trap
.type cheetah_deferred_trap,#function
cheetah_deferred_trap:
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
membar #Sync
/* Fetch and clear AFSR/AFAR */
ldxa [%g0] ASI_AFSR, %g4
ldxa [%g0] ASI_AFAR, %g5
stxa %g4, [%g0] ASI_AFSR
membar #Sync
ba,pt %xcc, __cheetah_log_error
nop
.size cheetah_deferred_trap,.-cheetah_deferred_trap
.type c_deferred,#function
c_deferred:
rdpr %pil, %g2
wrpr %g0, 15, %pil
ba,pt %xcc, etrap_irq
rd %pc, %g7
#ifdef CONFIG_TRACE_IRQFLAGS
call trace_hardirqs_off
nop
#endif
mov %l4, %o1
mov %l5, %o2
call cheetah_deferred_handler
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_irq
.size c_deferred,.-c_deferred
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