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) Hidetoshi Seto (seto.hidetoshi@jp.fujitsu.com) 7 */ 8#include <linux/config.h> 9#include <linux/threads.h> 10 11#include <asm/asmmacro.h> 12#include <asm/processor.h> 13#include <asm/ptrace.h> 14 15GLOBAL_ENTRY(mca_handler_bhhook) 16 invala // clear RSE ? 17 ;; 18 cover 19 ;; 20 clrrrb 21 ;; 22 alloc r16=ar.pfs,0,2,1,0 // make a new frame 23 ;; 24 mov ar.rsc=0 25 ;; 26 mov r13=IA64_KR(CURRENT) // current task pointer 27 ;; 28 mov r2=r13 29 ;; 30 addl r22=IA64_RBS_OFFSET,r2 31 ;; 32 mov ar.bspstore=r22 33 ;; 34 addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 35 ;; 36 adds r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 37 ;; 38 st1 [r2]=r0 // clear current->thread.on_ustack flag 39 mov loc0=r16 40 movl loc1=mca_handler_bh // recovery C function 41 ;; 42 mov out0=r8 // poisoned address 43 mov b6=loc1 44 ;; 45 mov loc1=rp 46 ;; 47 ssm psr.i 48 ;; 49 br.call.sptk.many rp=b6 // does not return ... 50 ;; 51 mov ar.pfs=loc0 52 mov rp=loc1 53 ;; 54 mov r8=r0 55 br.ret.sptk.many rp 56 ;; 57END(mca_handler_bhhook) 58