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- /*
- * File: mca_drv_asm.S
- * Purpose: Assembly portion of Generic MCA handling
- *
- * Copyright (C) 2004 FUJITSU LIMITED
- * Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
- */
- #include <linux/threads.h>
- #include <asm/asmmacro.h>
- #include <asm/processor.h>
- #include <asm/ptrace.h>
- GLOBAL_ENTRY(mca_handler_bhhook)
- invala // clear RSE ?
- cover
- ;;
- clrrrb
- ;;
- alloc r16=ar.pfs,0,2,3,0 // make a new frame
- mov ar.rsc=0
- mov r13=IA64_KR(CURRENT) // current task pointer
- ;;
- mov r2=r13
- ;;
- addl r22=IA64_RBS_OFFSET,r2
- ;;
- mov ar.bspstore=r22
- addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2
- ;;
- adds r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
- ;;
- st1 [r2]=r0 // clear current->thread.on_ustack flag
- mov loc0=r16
- movl loc1=mca_handler_bh // recovery C function
- ;;
- mov out0=r8 // poisoned address
- mov out1=r9 // iip
- mov out2=r10 // psr
- mov b6=loc1
- ;;
- mov loc1=rp
- ssm psr.ic
- ;;
- srlz.i
- ;;
- ssm psr.i
- br.call.sptk.many rp=b6 // does not return ...
- ;;
- mov ar.pfs=loc0
- mov rp=loc1
- ;;
- mov r8=r0
- br.ret.sptk.many rp
- END(mca_handler_bhhook)
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