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
|
/*
* uncompress.c - uncompressor code for self extracing pbl image
*
* Copyright (c) 2010-2013 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
* Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* 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 version 2
* as published by the Free Software Foundation.
*
* 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.
*
*/
#define pr_fmt(fmt) "uncompress.c: " fmt
#include <common.h>
#include <init.h>
#include <linux/sizes.h>
#include <pbl.h>
#include <asm/barebox-arm.h>
#include <asm/barebox-arm-head.h>
#include <asm-generic/memory_layout.h>
#include <asm/sections.h>
#include <asm/pgtable.h>
#include <asm/cache.h>
#include <asm/unaligned.h>
#include <debug_ll.h>
#include "mmu-early.h"
unsigned long free_mem_ptr;
unsigned long free_mem_end_ptr;
static int __attribute__((__used__))
__attribute__((__section__(".image_end")))
__image_end_dummy = 0xdeadbeef;
void __noreturn barebox_multi_pbl_start(unsigned long membase,
unsigned long memsize, void *boarddata)
{
uint32_t pg_len, uncompressed_len;
void __noreturn (*barebox)(unsigned long, unsigned long, void *);
uint32_t endmem = membase + memsize;
unsigned long barebox_base;
uint32_t *image_end;
void *pg_start;
unsigned long pc = get_pc();
image_end = (void *)ld_var(__image_end) - get_runtime_offset();
if (IS_ENABLED(CONFIG_PBL_RELOCATABLE)) {
/*
* If we run from inside the memory just relocate the binary
* to the current address. Otherwise it may be a readonly location.
* Copy and relocate to the start of the memory in this case.
*/
if (pc > membase && pc - membase < memsize)
relocate_to_current_adr();
else
relocate_to_adr(membase);
}
/*
* image_end is the first location after the executable. It contains
* the size of the appended compressed binary followed by the binary.
*/
pg_start = image_end + 1;
pg_len = *(image_end);
uncompressed_len = get_unaligned((const u32 *)(pg_start + pg_len - 4));
if (IS_ENABLED(CONFIG_RELOCATABLE))
barebox_base = arm_mem_barebox_image(membase, endmem,
uncompressed_len + MAX_BSS_SIZE);
else
barebox_base = TEXT_BASE;
setup_c();
pr_debug("memory at 0x%08lx, size 0x%08lx\n", membase, memsize);
if (IS_ENABLED(CONFIG_MMU_EARLY)) {
unsigned long ttb = arm_mem_ttb(membase, endmem);
pr_debug("enabling MMU, ttb @ 0x%08lx\n", ttb);
mmu_early_enable(membase, memsize, ttb);
}
free_mem_ptr = arm_mem_early_malloc(membase, endmem);
free_mem_end_ptr = arm_mem_early_malloc_end(membase, endmem);
pr_debug("uncompressing barebox binary at 0x%p (size 0x%08x) to 0x%08lx (uncompressed size: 0x%08x)\n",
pg_start, pg_len, barebox_base, uncompressed_len);
pbl_barebox_uncompress((void*)barebox_base, pg_start, pg_len);
arm_early_mmu_cache_flush();
flush_icache();
if (IS_ENABLED(CONFIG_THUMB2_BAREBOX))
barebox = (void *)(barebox_base + 1);
else
barebox = (void *)barebox_base;
pr_debug("jumping to uncompressed image at 0x%p\n", barebox);
barebox(membase, memsize, boarddata);
}
|