Pull move-iosapic-to-acpi into release branch
[linux-2.6] / arch / ia64 / kernel / mca_drv_asm.S
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
15 GLOBAL_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         ;;
57 END(mca_handler_bhhook)