summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/barebox-arm.h
blob: 67133265d1556c4693ec21bf0970bed8293d824f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Alex Zuepke <azu@sysgo.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef _BAREBOX_ARM_H_
#define _BAREBOX_ARM_H_

#include <linux/sizes.h>
#include <asm-generic/memory_layout.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/compiler.h>
#include <asm/barebox-arm-head.h>

/* cpu/.../cpu.c */
int	cleanup_before_linux(void);

/* arch/<arch>board(s)/.../... */
int	board_init(void);
int	dram_init (void);

extern char __exceptions_start[], __exceptions_stop[];

void board_init_lowlevel(void);
uint32_t get_runtime_offset(void);

void setup_c(void);
void relocate_to_current_adr(void);
void relocate_to_adr(unsigned long target);
void __noreturn barebox_arm_entry(unsigned long membase, unsigned long memsize, void *boarddata);

struct barebox_arm_boarddata {
#define BAREBOX_ARM_BOARDDATA_MAGIC	0xabe742c3
	u32 magic;
	u32 machine; /* machine number to pass to barebox. This may or may
		      * not be a ARM machine number registered on arm.linux.org.uk.
		      * It must only be unique across barebox. Please use a number
		      * that do not potientially clashes with registered machines,
		      * i.e. use a number > 0x10000.
		      */
};

/*
 * Create a boarddata struct at given address. Suitable to be passed
 * as boarddata to barebox_arm_entry(). The machine can be retrieved
 * later with barebox_arm_machine().
 */
static inline void boarddata_create(void *adr, u32 machine)
{
	struct barebox_arm_boarddata *bd = adr;

	bd->magic = BAREBOX_ARM_BOARDDATA_MAGIC;
	bd->machine = machine;
}

u32 barebox_arm_machine(void);

struct barebox_arm_boarddata_compressed_dtb {
#define BAREBOX_ARM_BOARDDATA_COMPRESSED_DTB_MAGIC 0x7b66bcbd
	u32 magic;
	u32 datalen;
	u32 datalen_uncompressed;
};

struct barebox_arm_boarddata *barebox_arm_get_boarddata(void);

#if defined(CONFIG_RELOCATABLE) && defined(CONFIG_ARM_EXCEPTIONS)
void arm_fixup_vectors(void);
#else
static inline void arm_fixup_vectors(void)
{
}
#endif

void *barebox_arm_boot_dtb(void);

static inline unsigned long arm_mem_stack(unsigned long membase,
					  unsigned long endmem)
{
	return endmem - STACK_SIZE;
}

static inline unsigned long arm_mem_ttb(unsigned long membase,
					unsigned long endmem)
{
	endmem = arm_mem_stack(membase, endmem);
	endmem &= ~(SZ_16K - 1);
	endmem -= SZ_16K;

	return endmem;
}

static inline unsigned long arm_mem_early_malloc(unsigned long membase,
						 unsigned long endmem)
{
	return arm_mem_ttb(membase, endmem) - SZ_128K;
}

static inline unsigned long arm_mem_early_malloc_end(unsigned long membase,
						     unsigned long endmem)
{
	return arm_mem_ttb(membase, endmem);
}

static inline unsigned long arm_mem_ramoops(unsigned long membase,
					    unsigned long endmem)
{
	endmem = arm_mem_ttb(membase, endmem);
#ifdef CONFIG_FS_PSTORE_RAMOOPS
	endmem -= CONFIG_FS_PSTORE_RAMOOPS_SIZE;
	endmem &= ~(SZ_4K - 1); /* Align to 4K */
#endif

	return endmem;
}

static inline unsigned long arm_mem_barebox_image(unsigned long membase,
						  unsigned long endmem,
						  unsigned long size)
{
	endmem = arm_mem_ramoops(membase, endmem);

	if (IS_ENABLED(CONFIG_RELOCATABLE)) {
		endmem -= size;
		endmem &= ~(SZ_1M - 1);
	}

	return endmem;
}

#define ENTRY_FUNCTION(name, arg0, arg1, arg2)				\
	static void __##name(uint32_t, uint32_t, uint32_t);		\
									\
	void __naked __section(.text_head_entry_##name)	name		\
				(uint32_t r0, uint32_t r1, uint32_t r2)	\
		{							\
			__barebox_arm_head();				\
			__##name(r0, r1, r2);				\
		}							\
		static void __naked noinline __##name			\
			(uint32_t arg0, uint32_t arg1, uint32_t arg2)



#endif	/* _BAREBOX_ARM_H_ */