/* $Id: etrap.S,v 1.45 2001/09/07 21:04:40 kanoj Exp $ * etrap.S: Preparing for entry into the kernel on Sparc V9. * * Copyright (C) 1996, 1997 David S. Miller (davem@caip.rutgers.edu) * Copyright (C) 1997, 1998, 1999 Jakub Jelinek (jj@ultra.linux.cz) */ #include #include #include #include #include #include #include #define TASK_REGOFF (THREAD_SIZE-TRACEREG_SZ-STACKFRAME_SZ) #define ETRAP_PSTATE1 (PSTATE_RMO | PSTATE_PRIV) #define ETRAP_PSTATE2 (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV | PSTATE_IE) /* * On entry, %g7 is return address - 0x4. * %g4 and %g5 will be preserved %l4 and %l5 respectively. */ .text .align 64 .globl etrap, etrap_irq, etraptl1 etrap: rdpr %pil, %g2 ! Single Group etrap_irq: rdpr %tstate, %g1 ! Single Group sllx %g2, 20, %g3 ! IEU0 Group andcc %g1, TSTATE_PRIV, %g0 ! IEU1 or %g1, %g3, %g1 ! IEU0 Group bne,pn %xcc, 1f ! CTI sub %sp, STACKFRAME_SZ+TRACEREG_SZ-STACK_BIAS, %g2 ! IEU1 wrpr %g0, 7, %cleanwin ! Single Group+4bubbles sethi %hi(TASK_REGOFF), %g2 ! IEU0 Group sethi %hi(TSTATE_PEF), %g3 ! IEU1 or %g2, %lo(TASK_REGOFF), %g2 ! IEU0 Group and %g1, %g3, %g3 ! IEU1 brnz,pn %g3, 1f ! CTI+IEU1 Group add %g6, %g2, %g2 ! IEU0 wr %g0, 0, %fprs ! Single Group+4bubbles 1: rdpr %tpc, %g3 ! Single Group stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TSTATE] ! Store Group rdpr %tnpc, %g1 ! Single Group stx %g3, [%g2 + STACKFRAME_SZ + PT_V9_TPC] ! Store Group rd %y, %g3 ! Single Group+4bubbles stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TNPC] ! Store Group st %g3, [%g2 + STACKFRAME_SZ + PT_V9_Y] ! Store Group save %g2, -STACK_BIAS, %sp ! Ordering here is critical ! Single Group mov %g6, %l6 ! IEU0 Group bne,pn %xcc, 3f ! CTI mov PRIMARY_CONTEXT, %l4 ! IEU1 rdpr %canrestore, %g3 ! Single Group+4bubbles rdpr %wstate, %g2 ! Single Group+4bubbles wrpr %g0, 0, %canrestore ! Single Group+4bubbles sll %g2, 3, %g2 ! IEU0 Group mov 1, %l5 ! IEU1 stb %l5, [%l6 + AOFF_task_thread + AOFF_thread_fpdepth] ! Store wrpr %g3, 0, %otherwin ! Single Group+4bubbles wrpr %g2, 0, %wstate ! Single Group+4bubbles stxa %g0, [%l4] ASI_DMMU ! Store Group flush %l6 ! Single Group+9bubbles wr %g0, ASI_AIUS, %asi ! Single Group+4bubbles 2: wrpr %g0, 0x0, %tl ! Single Group+4bubbles mov %g4, %l4 ! IEU1 mov %g5, %l5 ! IEU0 Group mov %g7, %l2 ! IEU1 wrpr %g0, ETRAP_PSTATE1, %pstate ! Single Group+4bubbles stx %g1, [%sp + PTREGS_OFF + PT_V9_G1] ! Store Group stx %g2, [%sp + PTREGS_OFF + PT_V9_G2] ! Store Group stx %g3, [%sp + PTREGS_OFF + PT_V9_G3] ! Store Group stx %g4, [%sp + PTREGS_OFF + PT_V9_G4] ! Store Group stx %g5, [%sp + PTREGS_OFF + PT_V9_G5] ! Store Group stx %g6, [%sp + PTREGS_OFF + PT_V9_G6] ! Store Group stx %g7, [%sp + PTREGS_OFF + PT_V9_G7] ! Store Group stx %i0, [%sp + PTREGS_OFF + PT_V9_I0] ! Store Group stx %i1, [%sp + PTREGS_OFF + PT_V9_I1] ! Store Group stx %i2, [%sp + PTREGS_OFF + PT_V9_I2] ! Store Group stx %i3, [%sp + PTREGS_OFF + PT_V9_I3] ! Store Group stx %i4, [%sp + PTREGS_OFF + PT_V9_I4] ! Store Group sethi %uhi(PAGE_OFFSET), %g4 ! IEU0 stx %i5, [%sp + PTREGS_OFF + PT_V9_I5] ! Store Group stx %i6, [%sp + PTREGS_OFF + PT_V9_I6] ! Store Group sllx %g4, 32, %g4 ! IEU0 stx %i7, [%sp + PTREGS_OFF + PT_V9_I7] ! Store Group wrpr %g0, ETRAP_PSTATE2, %pstate ! Single Group+4bubbles jmpl %l2 + 0x4, %g0 ! CTI Group mov %l6, %g6 ! IEU0 nop nop 3: ldub [%l6 + AOFF_task_thread + AOFF_thread_fpdepth], %l5 ! Load Group add %l6, AOFF_task_thread + AOFF_thread_fpsaved + 1, %l4 ! IEU0 srl %l5, 1, %l3 ! IEU0 Group add %l5, 2, %l5 ! IEU1 stb %l5, [%l6 + AOFF_task_thread + AOFF_thread_fpdepth] ! Store ba,pt %xcc, 2b ! CTI stb %g0, [%l4 + %l3] ! Store Group nop etraptl1: /* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself. * We place this right after pt_regs on the trap stack. The layout * is: * 0x00 TL1's TSTATE * 0x08 TL1's TPC * 0x10 TL1's TNPC * 0x18 TL1's TT * ... * 0x58 TL4's TT * 0x60 TL */ sub %sp, ((4 * 8) * 4) + 8, %g2 rdpr %tl, %g1 wrpr %g0, 1, %tl rdpr %tstate, %g3 stx %g3, [%g2 + STACK_BIAS + 0x00] rdpr %tpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x08] rdpr %tnpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x10] rdpr %tt, %g3 stx %g3, [%g2 + STACK_BIAS + 0x18] wrpr %g0, 2, %tl rdpr %tstate, %g3 stx %g3, [%g2 + STACK_BIAS + 0x20] rdpr %tpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x28] rdpr %tnpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x30] rdpr %tt, %g3 stx %g3, [%g2 + STACK_BIAS + 0x38] wrpr %g0, 3, %tl rdpr %tstate, %g3 stx %g3, [%g2 + STACK_BIAS + 0x40] rdpr %tpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x48] rdpr %tnpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x50] rdpr %tt, %g3 stx %g3, [%g2 + STACK_BIAS + 0x58] wrpr %g0, 4, %tl rdpr %tstate, %g3 stx %g3, [%g2 + STACK_BIAS + 0x60] rdpr %tpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x68] rdpr %tnpc, %g3 stx %g3, [%g2 + STACK_BIAS + 0x70] rdpr %tt, %g3 stx %g3, [%g2 + STACK_BIAS + 0x78] wrpr %g1, %tl stx %g1, [%g2 + STACK_BIAS + 0x80] rdpr %tstate, %g1 ! Single Group+4bubbles sub %g2, STACKFRAME_SZ + TRACEREG_SZ - STACK_BIAS, %g2 ! IEU1 ba,pt %xcc, 1b ! CTI Group andcc %g1, TSTATE_PRIV, %g0 ! IEU0 .align 64 .globl scetrap scetrap: rdpr %pil, %g2 ! Single Group rdpr %tstate, %g1 ! Single Group sllx %g2, 20, %g3 ! IEU0 Group andcc %g1, TSTATE_PRIV, %g0 ! IEU1 or %g1, %g3, %g1 ! IEU0 Group bne,pn %xcc, 1f ! CTI sub %sp, (STACKFRAME_SZ+TRACEREG_SZ-STACK_BIAS), %g2 ! IEU1 wrpr %g0, 7, %cleanwin ! Single Group+4bubbles sllx %g1, 51, %g3 ! IEU0 Group sethi %hi(TASK_REGOFF), %g2 ! IEU1 or %g2, %lo(TASK_REGOFF), %g2 ! IEU0 Group brlz,pn %g3, 1f ! CTI+IEU1 add %g6, %g2, %g2 ! IEU0 Group wr %g0, 0, %fprs ! Single Group+4bubbles 1: rdpr %tpc, %g3 ! Single Group stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TSTATE] ! Store Group rdpr %tnpc, %g1 ! Single Group stx %g3, [%g2 + STACKFRAME_SZ + PT_V9_TPC] ! Store Group stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TNPC] ! Store Group save %g2, -STACK_BIAS, %sp ! Ordering here is critical ! Single Group mov %g6, %l6 ! IEU0 Group bne,pn %xcc, 2f ! CTI mov ASI_P, %l7 ! IEU1 rdpr %canrestore, %g3 ! Single Group+4bubbles rdpr %wstate, %g2 ! Single Group+4bubbles wrpr %g0, 0, %canrestore ! Single Group+4bubbles sll %g2, 3, %g2 ! IEU0 Group mov PRIMARY_CONTEXT, %l4 ! IEU1 wrpr %g3, 0, %otherwin ! Single Group+4bubbles wrpr %g2, 0, %wstate ! Single Group+4bubbles stxa %g0, [%l4] ASI_DMMU ! Store flush %l6 ! Single Group+9bubbles mov ASI_AIUS, %l7 ! IEU0 Group 2: mov %g4, %l4 ! IEU1 mov %g5, %l5 ! IEU0 Group add %g7, 0x4, %l2 ! IEU1 wrpr %g0, ETRAP_PSTATE1, %pstate ! Single Group+4bubbles stx %g1, [%sp + PTREGS_OFF + PT_V9_G1] ! Store Group stx %g2, [%sp + PTREGS_OFF + PT_V9_G2] ! Store Group sllx %l7, 24, %l7 ! IEU0 stx %g3, [%sp + PTREGS_OFF + PT_V9_G3] ! Store Group rdpr %cwp, %l0 ! Single Group stx %g4, [%sp + PTREGS_OFF + PT_V9_G4] ! Store Group stx %g5, [%sp + PTREGS_OFF + PT_V9_G5] ! Store Group stx %g6, [%sp + PTREGS_OFF + PT_V9_G6] ! Store Group stx %g7, [%sp + PTREGS_OFF + PT_V9_G7] ! Store Group or %l7, %l0, %l7 ! IEU0 sethi %hi(TSTATE_RMO | TSTATE_PEF), %l0 ! IEU1 or %l7, %l0, %l7 ! IEU0 Group wrpr %l2, %tnpc ! Single Group+4bubbles wrpr %l7, (TSTATE_PRIV | TSTATE_IE), %tstate ! Single Group+4bubbles stx %i0, [%sp + PTREGS_OFF + PT_V9_I0] ! Store Group stx %i1, [%sp + PTREGS_OFF + PT_V9_I1] ! Store Group stx %i2, [%sp + PTREGS_OFF + PT_V9_I2] ! Store Group stx %i3, [%sp + PTREGS_OFF + PT_V9_I3] ! Store Group stx %i4, [%sp + PTREGS_OFF + PT_V9_I4] ! Store Group sethi %uhi(PAGE_OFFSET), %g4 ! IEU0 stx %i5, [%sp + PTREGS_OFF + PT_V9_I5] ! Store Group stx %i6, [%sp + PTREGS_OFF + PT_V9_I6] ! Store Group sllx %g4, 32, %g4 ! IEU0 mov %l6, %g6 ! IEU1 stx %i7, [%sp + PTREGS_OFF + PT_V9_I7] ! Store Group done nop #undef TASK_REGOFF #undef ETRAP_PSTATE1 #undef ETRAP_PSTATE2