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sparc32: Restore SMP build and rectify sun4m NMI when non-SMP. 

The non-SMP sun4m NMI handler was still accessing SUN4C registers.

Fix that and share the sun4m NMI trap code between SMP and non-SMP
cases.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-05-11 21:23:05 -07:00
parent 716a5d73a7
commit 96061a91a1
2 changed files with 31 additions and 51 deletions
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80
arch/sparc/kernel/entry.S
View File

@ -306,8 +306,8 @@ maybe_smp4m_msg_out:
RESTORE_ALL
.align 4
.globl linux_trap_ipi15
linux_trap_ipi15:
.globl linux_trap_ipi15_sun4m
linux_trap_ipi15_sun4m:
SAVE_ALL
sethi %hi(0x80000000), %o2
GET_PROCESSOR4M_ID(o0)
@ -317,7 +317,7 @@ linux_trap_ipi15:
ld [%o5 + %o0], %o5
ld [%o5 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
andcc %o3, %o2, %g0
be 1f ! Must be an NMI async memory error
be sun4m_nmi_error ! Must be an NMI async memory error
st %o2, [%o5 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x80000000
WRITE_PAUSE
ld [%o5 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
@ -331,27 +331,6 @@ linux_trap_ipi15:
nop
b ret_trap_lockless_ipi
clr %l6
1:
/* NMI async memory error handling. */
sethi %hi(0x80000000), %l4
sethi %hi(sun4m_irq_global), %o5
ld [%o5 + %lo(sun4m_irq_global)], %l5
st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call sun4m_nmi
nop
st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
RESTORE_ALL
.globl smp4d_ticker
/* SMP per-cpu ticker interrupts are handled specially. */
@ -749,35 +728,36 @@ setcc_trap_handler:
jmp %l2 ! advance over trap instruction
rett %l2 + 0x4 ! like this...
#ifndef CONFIG_SMP
.align 4
.globl linux_trap_ipi15
linux_trap_ipi15:
SAVE_ALL
/* Now it is safe to re-enable traps without recursion. */
or %l0, PSR_PIL, %l0
wr %l0, PSR_ET, %psr
sun4m_nmi_error:
/* NMI async memory error handling. */
sethi %hi(0x80000000), %l4
sethi %hi(sun4m_irq_global), %o5
ld [%o5 + %lo(sun4m_irq_global)], %l5
st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call sun4m_nmi
nop
st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
/* Now call the c-code with the pt_regs frame ptr and the
* memory error registers as arguments. The ordering chosen
* here is due to unlatching semantics.
*/
sethi %hi(AC_SYNC_ERR), %o0
add %o0, 0x4, %o0
lda [%o0] ASI_CONTROL, %o2 ! sync vaddr
sub %o0, 0x4, %o0
lda [%o0] ASI_CONTROL, %o1 ! sync error
add %o0, 0xc, %o0
lda [%o0] ASI_CONTROL, %o4 ! async vaddr
sub %o0, 0x4, %o0
lda [%o0] ASI_CONTROL, %o3 ! async error
call sparc_lvl15_nmi
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
#ifndef CONFIG_SMP
.align 4
.globl linux_trap_ipi15_sun4m
linux_trap_ipi15_sun4m:
SAVE_ALL
ba sun4m_nmi_error
nop
#endif /* CONFIG_SMP */
.align 4

2
arch/sparc/kernel/head_32.S
View File

@ -111,7 +111,7 @@ t_irq12:TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */
t_irq13:TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */
t_irq14:TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
.globl t_nmi
t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15)
t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */
t_iacce:BAD_TRAP(0x21) /* Instr Access Error */