1/* 2 * File: mca_drv_asm.S 3 * Purpose: Assembly portion of Generic MCA handling 4 * 5 * Copyright (C) 2004 FUJITSU LIMITED 6 * Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> 7 */ 8#include <linux/threads.h> 9 10#include <asm/asmmacro.h> 11#include <asm/processor.h> 12#include <asm/ptrace.h> 13 14GLOBAL_ENTRY(mca_handler_bhhook) 15 invala // clear RSE ? 16 cover 17 ;; 18 clrrrb 19 ;; 20 alloc r16=ar.pfs,0,2,3,0 // make a new frame 21 mov ar.rsc=0 22 mov r13=IA64_KR(CURRENT) // current task pointer 23 ;; 24 mov r2=r13 25 ;; 26 addl r22=IA64_RBS_OFFSET,r2 27 ;; 28 mov ar.bspstore=r22 29 addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 30 ;; 31 adds r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 32 ;; 33 st1 [r2]=r0 // clear current->thread.on_ustack flag 34 mov loc0=r16 35 movl loc1=mca_handler_bh // recovery C function 36 ;; 37 mov out0=r8 // poisoned address 38 mov out1=r9 // iip 39 mov out2=r10 // psr 40 mov b6=loc1 41 ;; 42 mov loc1=rp 43 ssm psr.ic 44 ;; 45 srlz.i 46 ;; 47 ssm psr.i 48 br.call.sptk.many rp=b6 // does not return ... 49 ;; 50 mov ar.pfs=loc0 51 mov rp=loc1 52 ;; 53 mov r8=r0 54 br.ret.sptk.many rp 55END(mca_handler_bhhook) 56