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48 lines
1.0 KiB
ArmAsm
48 lines
1.0 KiB
ArmAsm
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/*
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* sie64a.S - low level sie call
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*
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* Copyright IBM Corp. 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#include <linux/errno.h>
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#include <asm/asm-offsets.h>
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SP_R5 = 5 * 8 # offset into stackframe
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SP_R6 = 6 * 8
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/*
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* sie64a calling convention:
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* %r2 pointer to sie control block
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* %r3 guest register save area
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*/
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.globl sie64a
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sie64a:
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lgr %r5,%r3
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stmg %r5,%r14,SP_R5(%r15) # save register on entry
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lgr %r14,%r2 # pointer to sie control block
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lmg %r0,%r13,0(%r3) # load guest gprs 0-13
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sie_inst:
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sie 0(%r14)
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lg %r14,SP_R5(%r15)
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stmg %r0,%r13,0(%r14) # save guest gprs 0-13
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lghi %r2,0
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lmg %r6,%r14,SP_R6(%r15)
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br %r14
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sie_err:
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lg %r14,SP_R5(%r15)
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stmg %r0,%r13,0(%r14) # save guest gprs 0-13
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lghi %r2,-EFAULT
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lmg %r6,%r14,SP_R6(%r15)
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br %r14
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.section __ex_table,"a"
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.quad sie_inst,sie_err
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.previous
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