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
12opal_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;					\
26name:							\
27	li	r0, token;				\
28	b	opal_call;
29
30opal_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 base */
48	LOAD_REG_ADDR(r11, opal)
49	ld	r12,8(r11)
50	ld	r2,0(r11)
51	mtspr	SPRN_HSRR0,r12
52	hrfid
53
54opal_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
63OPAL_CALL(opal_console_write,			OPAL_CONSOLE_WRITE);
64OPAL_CALL(opal_console_read,			OPAL_CONSOLE_READ);
65OPAL_CALL(opal_console_write_buffer_space,	OPAL_CONSOLE_WRITE_BUFFER_SPACE);
66OPAL_CALL(opal_poll_events,			OPAL_POLL_EVENTS);
67OPAL_CALL(opal_console_flush,			OPAL_CONSOLE_FLUSH);

 
 1/*
 2 * Copyright (c) 2016 IBM Corporation.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version
 7 * 2 of the License, or (at your option) any later version.
 8 */
 9
10#include "ppc_asm.h"
11#include "../include/asm/opal-api.h"
12
13	.text
14
15	.globl opal_kentry
16opal_kentry:
17	/* r3 is the fdt ptr */
18	mtctr r4
19	li	r4, 0
20	li	r5, 0
21	li	r6, 0
22	li	r7, 0
23	ld	r11,opal@got(r2)
24	ld	r8,0(r11)
25	ld	r9,8(r11)
26	bctr
27
28#define OPAL_CALL(name, token)				\
29	.globl name;					\
30name:							\
31	li	r0, token;				\
32	b	opal_call;
33
34opal_call:
35	mflr	r11
36	std	r11,16(r1)
37	mfcr	r12
38	stw	r12,8(r1)
39	mr	r13,r2
40
41	/* Set opal return address */
42	ld	r11,opal_return@got(r2)
43	mtlr	r11
44	mfmsr	r12
45
46	/* switch to BE when we enter OPAL */
47	li	r11,MSR_LE
48	andc	r12,r12,r11
49	mtspr	SPRN_HSRR1,r12
50
51	/* load the opal call entry point and base */
52	ld	r11,opal@got(r2)
53	ld	r12,8(r11)
54	ld	r2,0(r11)
55	mtspr	SPRN_HSRR0,r12
56	hrfid
57
58opal_return:
59	FIXUP_ENDIAN
60	mr	r2,r13;
61	lwz	r11,8(r1);
62	ld	r12,16(r1)
63	mtcr	r11;
64	mtlr	r12
65	blr
66
67OPAL_CALL(opal_console_write,			OPAL_CONSOLE_WRITE);
68OPAL_CALL(opal_console_read,			OPAL_CONSOLE_READ);
69OPAL_CALL(opal_console_write_buffer_space,	OPAL_CONSOLE_WRITE_BUFFER_SPACE);
70OPAL_CALL(opal_poll_events,			OPAL_POLL_EVENTS);
71OPAL_CALL(opal_console_flush,			OPAL_CONSOLE_FLUSH);