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