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| author | David S. Miller <davem@davemloft.net> | 2012-05-11 21:23:05 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-11 21:23:05 -0700 |
| commit | 96061a91a1265d2f8dae6f4a6064bd77faec4df5 (patch) | |
| tree | 4fe080ca676f05f8f0fa979fed88e47d5e7b23c1 /arch/sparc/kernel/entry.S | |
| parent | 716a5d73a787a3d1f6e2bd8ce34a788bb8bf368f (diff) | |
| download | linux-96061a91a1265d2f8dae6f4a6064bd77faec4df5.tar.bz2 | |
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>
Diffstat (limited to 'arch/sparc/kernel/entry.S')
| -rw-r--r-- | arch/sparc/kernel/entry.S | 78 |
1 files changed, 29 insertions, 49 deletions
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S index 1b87ea088e1a..4976d655c9c3 100644 --- a/arch/sparc/kernel/entry.S +++ b/arch/sparc/kernel/entry.S @@ -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... +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 + RESTORE_ALL + #ifndef CONFIG_SMP .align 4 - .globl linux_trap_ipi15 -linux_trap_ipi15: + .globl linux_trap_ipi15_sun4m +linux_trap_ipi15_sun4m: SAVE_ALL - /* Now it is safe to re-enable traps without recursion. */ - or %l0, PSR_PIL, %l0 - wr %l0, PSR_ET, %psr - 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 - + ba sun4m_nmi_error + nop #endif /* CONFIG_SMP */ .align 4 |