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56 lines
1.1 KiB
56 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* File: mca_drv_asm.S |
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* Purpose: Assembly portion of Generic MCA handling |
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* |
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* Copyright (C) 2004 FUJITSU LIMITED |
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* Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> |
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*/ |
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#include <linux/threads.h> |
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#include <asm/asmmacro.h> |
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#include <asm/processor.h> |
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#include <asm/ptrace.h> |
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GLOBAL_ENTRY(mca_handler_bhhook) |
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invala // clear RSE ? |
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cover |
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;; |
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clrrrb |
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;; |
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alloc r16=ar.pfs,0,2,3,0 // make a new frame |
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mov ar.rsc=0 |
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mov r13=IA64_KR(CURRENT) // current task pointer |
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;; |
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mov r2=r13 |
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;; |
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addl r22=IA64_RBS_OFFSET,r2 |
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;; |
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mov ar.bspstore=r22 |
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addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 |
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;; |
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adds r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 |
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;; |
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st1 [r2]=r0 // clear current->thread.on_ustack flag |
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mov loc0=r16 |
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movl loc1=mca_handler_bh // recovery C function |
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;; |
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mov out0=r8 // poisoned address |
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mov out1=r9 // iip |
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mov out2=r10 // psr |
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mov b6=loc1 |
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;; |
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mov loc1=rp |
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ssm psr.ic |
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;; |
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srlz.i |
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;; |
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ssm psr.i |
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br.call.sptk.many rp=b6 // does not return ... |
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;; |
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mov ar.pfs=loc0 |
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mov rp=loc1 |
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;; |
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mov r8=r0 |
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br.ret.sptk.many rp |
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END(mca_handler_bhhook)
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