diff options
Diffstat (limited to 'arch/sparc64/mm/ultra.S')
| -rw-r--r-- | arch/sparc64/mm/ultra.S | 42 |
1 files changed, 7 insertions, 35 deletions
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S index 4c8ca131ffa..ff1dc44d363 100644 --- a/arch/sparc64/mm/ultra.S +++ b/arch/sparc64/mm/ultra.S @@ -480,41 +480,6 @@ xcall_sync_tick: b rtrap_xcall ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1 - /* NOTE: This is SPECIAL!! We do etrap/rtrap however - * we choose to deal with the "BH's run with - * %pil==15" problem (described in asm/pil.h) - * by just invoking rtrap directly past where - * BH's are checked for. - * - * We do it like this because we do not want %pil==15 - * lockups to prevent regs being reported. - */ - .globl xcall_report_regs -xcall_report_regs: - -661: rdpr %pstate, %g2 - wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate - .section .sun4v_2insn_patch, "ax" - .word 661b - nop - nop - .previous - - rdpr %pil, %g2 - wrpr %g0, 15, %pil - sethi %hi(109f), %g7 - b,pt %xcc, etrap_irq -109: or %g7, %lo(109b), %g7 -#ifdef CONFIG_TRACE_IRQFLAGS - call trace_hardirqs_off - nop -#endif - call __show_regs - add %sp, PTREGS_OFF, %o0 - /* Has to be a non-v9 branch due to the large distance. */ - b rtrap_xcall - ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1 - #ifdef CONFIG_MAGIC_SYSRQ .globl xcall_fetch_glob_regs xcall_fetch_glob_regs: @@ -531,6 +496,13 @@ xcall_fetch_glob_regs: stx %g7, [%g1 + GR_SNAP_TNPC] stx %o7, [%g1 + GR_SNAP_O7] stx %i7, [%g1 + GR_SNAP_I7] + /* Don't try this at home kids... */ + rdpr %cwp, %g2 + sub %g2, 1, %g7 + wrpr %g7, %cwp + mov %i7, %g7 + wrpr %g2, %cwp + stx %g7, [%g1 + GR_SNAP_RPC] sethi %hi(trap_block), %g7 or %g7, %lo(trap_block), %g7 sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2 |