| /* |
| * 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/config.h> |
| #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,0,2,1,0 // 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 b6=loc1 |
| ;; |
| mov loc1=rp |
| ;; |
| 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) |