/* * File: mca_drv_asm.S * Purpose: Assembly portion of Generic MCA handling * * Copyright (C) 2004 FUJITSU LIMITED * Copyright (C) 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.i | psr.ic 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)