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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * File: mca_drv_asm.S | |
4 | * Purpose: Assembly portion of Generic MCA handling | |
5 | * | |
6 | * Copyright (C) 2004 FUJITSU LIMITED | |
fe77efb8 | 7 | * Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> |
1da177e4 | 8 | */ |
1da177e4 LT |
9 | #include <linux/threads.h> |
10 | ||
11 | #include <asm/asmmacro.h> | |
12 | #include <asm/processor.h> | |
b1b901c2 | 13 | #include <asm/ptrace.h> |
1da177e4 LT |
14 | |
15 | GLOBAL_ENTRY(mca_handler_bhhook) | |
20305e59 | 16 | invala // clear RSE ? |
20305e59 HS |
17 | cover |
18 | ;; | |
19 | clrrrb | |
1da177e4 | 20 | ;; |
d2a28ad9 | 21 | alloc r16=ar.pfs,0,2,3,0 // make a new frame |
20305e59 | 22 | mov ar.rsc=0 |
20305e59 | 23 | mov r13=IA64_KR(CURRENT) // current task pointer |
1da177e4 | 24 | ;; |
20305e59 | 25 | mov r2=r13 |
b1b901c2 | 26 | ;; |
20305e59 | 27 | addl r22=IA64_RBS_OFFSET,r2 |
b1b901c2 | 28 | ;; |
20305e59 | 29 | mov ar.bspstore=r22 |
20305e59 | 30 | addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 |
1da177e4 | 31 | ;; |
20305e59 | 32 | adds r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 |
b1b901c2 | 33 | ;; |
20305e59 HS |
34 | st1 [r2]=r0 // clear current->thread.on_ustack flag |
35 | mov loc0=r16 | |
36 | movl loc1=mca_handler_bh // recovery C function | |
1da177e4 | 37 | ;; |
20305e59 | 38 | mov out0=r8 // poisoned address |
d2a28ad9 RA |
39 | mov out1=r9 // iip |
40 | mov out2=r10 // psr | |
20305e59 | 41 | mov b6=loc1 |
1da177e4 | 42 | ;; |
20305e59 | 43 | mov loc1=rp |
83ce6ef8 TL |
44 | ssm psr.ic |
45 | ;; | |
46 | srlz.i | |
47 | ;; | |
48 | ssm psr.i | |
20305e59 | 49 | br.call.sptk.many rp=b6 // does not return ... |
1da177e4 | 50 | ;; |
20305e59 HS |
51 | mov ar.pfs=loc0 |
52 | mov rp=loc1 | |
1da177e4 | 53 | ;; |
20305e59 | 54 | mov r8=r0 |
1da177e4 | 55 | br.ret.sptk.many rp |
1da177e4 | 56 | END(mca_handler_bhhook) |