1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * File:        mca_drv_asm.S
 4 * Purpose:     Assembly portion of Generic MCA handling
 5 *
 6 * Copyright (C) 2004 FUJITSU LIMITED
 7 * Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
 8 */
 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	cover
18	;;
19	clrrrb
20	;;						
21	alloc	r16=ar.pfs,0,2,3,0	// make a new frame
22	mov	ar.rsc=0
23	mov	r13=IA64_KR(CURRENT)	// current task pointer
24	;;
25	mov	r2=r13
26	;;
27	addl	r22=IA64_RBS_OFFSET,r2
28	;;
29	mov	ar.bspstore=r22
30	addl	sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2
31	;;
32	adds	r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
33	;;
34	st1	[r2]=r0		// clear current->thread.on_ustack flag
35	mov	loc0=r16
36	movl	loc1=mca_handler_bh	// recovery C function
37	;;
38	mov	out0=r8			// poisoned address
39	mov	out1=r9			// iip
40	mov	out2=r10		// psr
41	mov	b6=loc1
42	;;
43	mov	loc1=rp
44	ssm	psr.ic
45	;;
46	srlz.i
47	;;
48	ssm	psr.i
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
56END(mca_handler_bhhook)

 
 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)