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/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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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