diff options
Diffstat (limited to 'arch/ia64/kernel/mca_drv_asm.S')
| -rw-r--r-- | arch/ia64/kernel/mca_drv_asm.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/ia64/kernel/mca_drv_asm.S b/arch/ia64/kernel/mca_drv_asm.S new file mode 100644 index 000000000..4428f57be --- /dev/null +++ b/arch/ia64/kernel/mca_drv_asm.S @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * File: mca_drv_asm.S + * Purpose: Assembly portion of Generic MCA handling + * + * Copyright (C) 2004 FUJITSU LIMITED + * Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> + */ +#include <linux/threads.h> + +#include <asm/asmmacro.h> +#include <asm/processor.h> +#include <asm/ptrace.h> + +GLOBAL_ENTRY(mca_handler_bhhook) + invala // clear RSE ? + cover + ;; + clrrrb + ;; + alloc r16=ar.pfs,0,2,3,0 // make a new frame + mov ar.rsc=0 + mov r13=IA64_KR(CURRENT) // current task pointer + ;; + mov r2=r13 + ;; + addl r22=IA64_RBS_OFFSET,r2 + ;; + mov ar.bspstore=r22 + addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 + ;; + adds r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 + ;; + st1 [r2]=r0 // clear current->thread.on_ustack flag + mov loc0=r16 + movl loc1=mca_handler_bh // recovery C function + ;; + mov out0=r8 // poisoned address + mov out1=r9 // iip + mov out2=r10 // psr + mov b6=loc1 + ;; + mov loc1=rp + ssm psr.ic + ;; + srlz.i + ;; + ssm psr.i + br.call.sptk.many rp=b6 // does not return ... + ;; + mov ar.pfs=loc0 + mov rp=loc1 + ;; + mov r8=r0 + br.ret.sptk.many rp +END(mca_handler_bhhook) |