tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * sie64a.S - low level sie call
3 *
4 * Copyright IBM Corp. 2008
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
11 */
12
13#include <linux/errno.h>
14#include <asm/asm-offsets.h>
15
16SP_R5 = 5 * 8 # offset into stackframe
17SP_R6 = 6 * 8
18
19/*
20 * sie64a calling convention:
21 * %r2 pointer to sie control block
22 * %r3 guest register save area
23 */
24 .globl sie64a
25sie64a:
26 lgr %r5,%r3
27 stmg %r5,%r14,SP_R5(%r15) # save register on entry
28 lgr %r14,%r2 # pointer to sie control block
29 lmg %r0,%r13,0(%r3) # load guest gprs 0-13
30sie_inst:
31 sie 0(%r14)
32 lg %r14,SP_R5(%r15)
33 stmg %r0,%r13,0(%r14) # save guest gprs 0-13
34 lghi %r2,0
35 lmg %r6,%r14,SP_R6(%r15)
36 br %r14
37
38sie_err:
39 lg %r14,SP_R5(%r15)
40 stmg %r0,%r13,0(%r14) # save guest gprs 0-13
41 lghi %r2,-EFAULT
42 lmg %r6,%r14,SP_R6(%r15)
43 br %r14
44
45 .section __ex_table,"a"
46 .quad sie_inst,sie_err
47 .previous