Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/ia64/kernel/mca_drv_asm.S
10817 views
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 <[email protected]>

7
 */

8
#include <linux/threads.h>

9


10
#include <asm/asmmacro.h>

11
#include <asm/processor.h>

12
#include <asm/ptrace.h>

13


14
GLOBAL_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

55
END(mca_handler_bhhook)

56


57