1 /* SPDX-License-Identifier: GPL-2.0-or-later *
2 /*
3 * Copyright (c) 2016 IBM Corporation.
4 */
5
6 #include "ppc_asm.h"
7 #include "../include/asm/opal-api.h"
8
9 .text
10
11 .globl opal_kentry
12 opal_kentry:
13 /* r3 is the fdt ptr */
14 mtctr r4
15 li r4, 0
16 li r5, 0
17 li r6, 0
18 li r7, 0
19 LOAD_REG_ADDR(r11, opal)
20 ld r8,0(r11)
21 ld r9,8(r11)
22 bctr
23
24 #define OPAL_CALL(name, token)
25 .globl name;
26 name:
27 li r0, token;
28 b opal_call;
29
30 opal_call:
31 mflr r11
32 std r11,16(r1)
33 mfcr r12
34 stw r12,8(r1)
35 mr r13,r2
36
37 /* Set opal return address */
38 LOAD_REG_ADDR(r11, opal_return)
39 mtlr r11
40 mfmsr r12
41
42 /* switch to BE when we enter OPAL */
43 li r11,MSR_LE
44 andc r12,r12,r11
45 mtspr SPRN_HSRR1,r12
46
47 /* load the opal call entry point and
48 LOAD_REG_ADDR(r11, opal)
49 ld r12,8(r11)
50 ld r2,0(r11)
51 mtspr SPRN_HSRR0,r12
52 hrfid
53
54 opal_return:
55 FIXUP_ENDIAN
56 mr r2,r13;
57 lwz r11,8(r1);
58 ld r12,16(r1)
59 mtcr r11;
60 mtlr r12
61 blr
62
63 OPAL_CALL(opal_console_write,
64 OPAL_CALL(opal_console_read,
65 OPAL_CALL(opal_console_write_buffer_space,
66 OPAL_CALL(opal_poll_events,
67 OPAL_CALL(opal_console_flush,
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.