prom.c (a61944c251c3e68c4bbf6eb96ff61c7b286351c5) prom.c (307cfe715344e15eda12dad3bb14f794115ca823)
1/*
2 * Procedures for creating, accessing and interpreting the device tree.
3 *
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com

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77
78 memory_limit = PAGE_ALIGN(memparse(p, &p));
79 DBG("memory limit = 0x%llx\n", (unsigned long long)memory_limit);
80
81 return 0;
82}
83early_param("mem", early_parse_mem);
84
1/*
2 * Procedures for creating, accessing and interpreting the device tree.
3 *
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com

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77
78 memory_limit = PAGE_ALIGN(memparse(p, &p));
79 DBG("memory limit = 0x%llx\n", (unsigned long long)memory_limit);
80
81 return 0;
82}
83early_param("mem", early_parse_mem);
84
85/*
86 * overlaps_initrd - check for overlap with page aligned extension of
87 * initrd.
88 */
89static inline int overlaps_initrd(unsigned long start, unsigned long size)
90{
91#ifdef CONFIG_BLK_DEV_INITRD
92 if (!initrd_start)
93 return 0;
94
95 return (start + size) > _ALIGN_DOWN(initrd_start, PAGE_SIZE) &&
96 start <= _ALIGN_UP(initrd_end, PAGE_SIZE);
97#else
98 return 0;
99#endif
100}
101
85/**
86 * move_device_tree - move tree to an unused area, if needed.
87 *
88 * The device tree may be allocated beyond our memory limit, or inside the
102/**
103 * move_device_tree - move tree to an unused area, if needed.
104 *
105 * The device tree may be allocated beyond our memory limit, or inside the
89 * crash kernel region for kdump. If so, move it out of the way.
106 * crash kernel region for kdump, or within the page aligned range of initrd.
107 * If so, move it out of the way.
90 */
91static void __init move_device_tree(void)
92{
93 unsigned long start, size;
94 void *p;
95
96 DBG("-> move_device_tree\n");
97
98 start = __pa(initial_boot_params);
99 size = be32_to_cpu(initial_boot_params->totalsize);
100
101 if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) ||
108 */
109static void __init move_device_tree(void)
110{
111 unsigned long start, size;
112 void *p;
113
114 DBG("-> move_device_tree\n");
115
116 start = __pa(initial_boot_params);
117 size = be32_to_cpu(initial_boot_params->totalsize);
118
119 if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) ||
102 overlaps_crashkernel(start, size)) {
120 overlaps_crashkernel(start, size) ||
121 overlaps_initrd(start, size)) {
103 p = __va(memblock_alloc(size, PAGE_SIZE));
104 memcpy(p, initial_boot_params, size);
105 initial_boot_params = (struct boot_param_header *)p;
106 DBG("Moved device tree to 0x%p\n", p);
107 }
108
109 DBG("<- move_device_tree\n");
110}

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550 /* before we do anything, lets reserve the dt blob */
551 self_base = __pa((unsigned long)initial_boot_params);
552 self_size = initial_boot_params->totalsize;
553 memblock_reserve(self_base, self_size);
554
555#ifdef CONFIG_BLK_DEV_INITRD
556 /* then reserve the initrd, if any */
557 if (initrd_start && (initrd_end > initrd_start))
122 p = __va(memblock_alloc(size, PAGE_SIZE));
123 memcpy(p, initial_boot_params, size);
124 initial_boot_params = (struct boot_param_header *)p;
125 DBG("Moved device tree to 0x%p\n", p);
126 }
127
128 DBG("<- move_device_tree\n");
129}

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569 /* before we do anything, lets reserve the dt blob */
570 self_base = __pa((unsigned long)initial_boot_params);
571 self_size = initial_boot_params->totalsize;
572 memblock_reserve(self_base, self_size);
573
574#ifdef CONFIG_BLK_DEV_INITRD
575 /* then reserve the initrd, if any */
576 if (initrd_start && (initrd_end > initrd_start))
558 memblock_reserve(__pa(initrd_start), initrd_end - initrd_start);
577 memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE),
578 _ALIGN_UP(initrd_end, PAGE_SIZE) -
579 _ALIGN_DOWN(initrd_start, PAGE_SIZE));
559#endif /* CONFIG_BLK_DEV_INITRD */
560
561#ifdef CONFIG_PPC32
562 /*
563 * Handle the case where we might be booting from an old kexec
564 * image that setup the mem_rsvmap as pairs of 32-bit values
565 */
566 if (*reserve_map > 0xffffffffull) {

--- 364 unchanged lines hidden --- 		580#endif /* CONFIG_BLK_DEV_INITRD */
581
582#ifdef CONFIG_PPC32
583 /*
584 * Handle the case where we might be booting from an old kexec
585 * image that setup the mem_rsvmap as pairs of 32-bit values
586 */
587 if (*reserve_map > 0xffffffffull) {

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