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-rw-r--r--arch/ppc64/kernel/hvCall.S98
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diff --git a/arch/ppc64/kernel/hvCall.S b/arch/ppc64/kernel/hvCall.S
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1/*
2 * arch/ppc64/kernel/hvCall.S
3 *
4 *
5 * This file contains the code to perform calls to the
6 * iSeries LPAR hypervisor
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
14#include <asm/ppc_asm.h>
15#include <asm/processor.h>
16
17 .text
18
19/*
20 * Hypervisor call
21 *
22 * Invoke the iSeries hypervisor via the System Call instruction
23 * Parameters are passed to this routine in registers r3 - r10
24 *
25 * r3 contains the HV function to be called
26 * r4-r10 contain the operands to the hypervisor function
27 *
28 */
29
30_GLOBAL(HvCall)
31_GLOBAL(HvCall0)
32_GLOBAL(HvCall1)
33_GLOBAL(HvCall2)
34_GLOBAL(HvCall3)
35_GLOBAL(HvCall4)
36_GLOBAL(HvCall5)
37_GLOBAL(HvCall6)
38_GLOBAL(HvCall7)
39
40
41 mfcr r0
42 std r0,-8(r1)
43 stdu r1,-(STACK_FRAME_OVERHEAD+16)(r1)
44
45 /* r0 = 0xffffffffffffffff indicates a hypervisor call */
46
47 li r0,-1
48
49 /* Invoke the hypervisor */
50
51 sc
52
53 ld r1,0(r1)
54 ld r0,-8(r1)
55 mtcrf 0xff,r0
56
57 /* return to caller, return value in r3 */
58
59 blr
60
61_GLOBAL(HvCall0Ret16)
62_GLOBAL(HvCall1Ret16)
63_GLOBAL(HvCall2Ret16)
64_GLOBAL(HvCall3Ret16)
65_GLOBAL(HvCall4Ret16)
66_GLOBAL(HvCall5Ret16)
67_GLOBAL(HvCall6Ret16)
68_GLOBAL(HvCall7Ret16)
69
70 mfcr r0
71 std r0,-8(r1)
72 std r31,-16(r1)
73 stdu r1,-(STACK_FRAME_OVERHEAD+32)(r1)
74
75 mr r31,r4
76 li r0,-1
77 mr r4,r5
78 mr r5,r6
79 mr r6,r7
80 mr r7,r8
81 mr r8,r9
82 mr r9,r10
83
84 sc
85
86 std r3,0(r31)
87 std r4,8(r31)
88
89 mr r3,r5
90
91 ld r1,0(r1)
92 ld r0,-8(r1)
93 mtcrf 0xff,r0
94 ld r31,-16(r1)
95
96 blr
97
98