mm: move mem_init_print_info() into mm_init()
[linux-2.6-microblaze.git] / arch / xtensa / mm / init.c
1 /*
2  * arch/xtensa/mm/init.c
3  *
4  * Derived from MIPS, PPC.
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License.  See the file "COPYING" in the main directory of this archive
8  * for more details.
9  *
10  * Copyright (C) 2001 - 2005 Tensilica Inc.
11  * Copyright (C) 2014 - 2016 Cadence Design Systems Inc.
12  *
13  * Chris Zankel <chris@zankel.net>
14  * Joe Taylor   <joe@tensilica.com, joetylr@yahoo.com>
15  * Marc Gauthier
16  * Kevin Chea
17  */
18
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/memblock.h>
22 #include <linux/gfp.h>
23 #include <linux/highmem.h>
24 #include <linux/swap.h>
25 #include <linux/mman.h>
26 #include <linux/nodemask.h>
27 #include <linux/mm.h>
28 #include <linux/of_fdt.h>
29 #include <linux/dma-map-ops.h>
30
31 #include <asm/bootparam.h>
32 #include <asm/page.h>
33 #include <asm/sections.h>
34 #include <asm/sysmem.h>
35
36 /*
37  * Initialize the bootmem system and give it all low memory we have available.
38  */
39
40 void __init bootmem_init(void)
41 {
42         /* Reserve all memory below PHYS_OFFSET, as memory
43          * accounting doesn't work for pages below that address.
44          *
45          * If PHYS_OFFSET is zero reserve page at address 0:
46          * successfull allocations should never return NULL.
47          */
48         memblock_reserve(0, PHYS_OFFSET ? PHYS_OFFSET : 1);
49
50         early_init_fdt_scan_reserved_mem();
51
52         if (!memblock_phys_mem_size())
53                 panic("No memory found!\n");
54
55         min_low_pfn = PFN_UP(memblock_start_of_DRAM());
56         min_low_pfn = max(min_low_pfn, PFN_UP(PHYS_OFFSET));
57         max_pfn = PFN_DOWN(memblock_end_of_DRAM());
58         max_low_pfn = min(max_pfn, MAX_LOW_PFN);
59
60         early_memtest((phys_addr_t)min_low_pfn << PAGE_SHIFT,
61                       (phys_addr_t)max_low_pfn << PAGE_SHIFT);
62
63         memblock_set_current_limit(PFN_PHYS(max_low_pfn));
64         dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
65
66         memblock_dump_all();
67 }
68
69
70 void __init zones_init(void)
71 {
72         /* All pages are DMA-able, so we put them all in the DMA zone. */
73         unsigned long max_zone_pfn[MAX_NR_ZONES] = {
74                 [ZONE_NORMAL] = max_low_pfn,
75 #ifdef CONFIG_HIGHMEM
76                 [ZONE_HIGHMEM] = max_pfn,
77 #endif
78         };
79         free_area_init(max_zone_pfn);
80 }
81
82 static void __init free_highpages(void)
83 {
84 #ifdef CONFIG_HIGHMEM
85         unsigned long max_low = max_low_pfn;
86         phys_addr_t range_start, range_end;
87         u64 i;
88
89         /* set highmem page free */
90         for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE,
91                                 &range_start, &range_end, NULL) {
92                 unsigned long start = PFN_UP(range_start);
93                 unsigned long end = PFN_DOWN(range_end);
94
95                 /* Ignore complete lowmem entries */
96                 if (end <= max_low)
97                         continue;
98
99                 /* Truncate partial highmem entries */
100                 if (start < max_low)
101                         start = max_low;
102
103                 for (; start < end; start++)
104                         free_highmem_page(pfn_to_page(start));
105         }
106 #endif
107 }
108
109 /*
110  * Initialize memory pages.
111  */
112
113 void __init mem_init(void)
114 {
115         free_highpages();
116
117         max_mapnr = max_pfn - ARCH_PFN_OFFSET;
118         high_memory = (void *)__va(max_low_pfn << PAGE_SHIFT);
119
120         memblock_free_all();
121
122         pr_info("virtual kernel memory layout:\n"
123 #ifdef CONFIG_KASAN
124                 "    kasan   : 0x%08lx - 0x%08lx  (%5lu MB)\n"
125 #endif
126 #ifdef CONFIG_MMU
127                 "    vmalloc : 0x%08lx - 0x%08lx  (%5lu MB)\n"
128 #endif
129 #ifdef CONFIG_HIGHMEM
130                 "    pkmap   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
131                 "    fixmap  : 0x%08lx - 0x%08lx  (%5lu kB)\n"
132 #endif
133                 "    lowmem  : 0x%08lx - 0x%08lx  (%5lu MB)\n"
134                 "    .text   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
135                 "    .rodata : 0x%08lx - 0x%08lx  (%5lu kB)\n"
136                 "    .data   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
137                 "    .init   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
138                 "    .bss    : 0x%08lx - 0x%08lx  (%5lu kB)\n",
139 #ifdef CONFIG_KASAN
140                 KASAN_SHADOW_START, KASAN_SHADOW_START + KASAN_SHADOW_SIZE,
141                 KASAN_SHADOW_SIZE >> 20,
142 #endif
143 #ifdef CONFIG_MMU
144                 VMALLOC_START, VMALLOC_END,
145                 (VMALLOC_END - VMALLOC_START) >> 20,
146 #ifdef CONFIG_HIGHMEM
147                 PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE,
148                 (LAST_PKMAP*PAGE_SIZE) >> 10,
149                 FIXADDR_START, FIXADDR_END,
150                 (FIXADDR_END - FIXADDR_START) >> 10,
151 #endif
152                 PAGE_OFFSET, PAGE_OFFSET +
153                 (max_low_pfn - min_low_pfn) * PAGE_SIZE,
154 #else
155                 min_low_pfn * PAGE_SIZE, max_low_pfn * PAGE_SIZE,
156 #endif
157                 ((max_low_pfn - min_low_pfn) * PAGE_SIZE) >> 20,
158                 (unsigned long)_text, (unsigned long)_etext,
159                 (unsigned long)(_etext - _text) >> 10,
160                 (unsigned long)__start_rodata, (unsigned long)__end_rodata,
161                 (unsigned long)(__end_rodata - __start_rodata) >> 10,
162                 (unsigned long)_sdata, (unsigned long)_edata,
163                 (unsigned long)(_edata - _sdata) >> 10,
164                 (unsigned long)__init_begin, (unsigned long)__init_end,
165                 (unsigned long)(__init_end - __init_begin) >> 10,
166                 (unsigned long)__bss_start, (unsigned long)__bss_stop,
167                 (unsigned long)(__bss_stop - __bss_start) >> 10);
168 }
169
170 static void __init parse_memmap_one(char *p)
171 {
172         char *oldp;
173         unsigned long start_at, mem_size;
174
175         if (!p)
176                 return;
177
178         oldp = p;
179         mem_size = memparse(p, &p);
180         if (p == oldp)
181                 return;
182
183         switch (*p) {
184         case '@':
185                 start_at = memparse(p + 1, &p);
186                 memblock_add(start_at, mem_size);
187                 break;
188
189         case '$':
190                 start_at = memparse(p + 1, &p);
191                 memblock_reserve(start_at, mem_size);
192                 break;
193
194         case 0:
195                 memblock_reserve(mem_size, -mem_size);
196                 break;
197
198         default:
199                 pr_warn("Unrecognized memmap syntax: %s\n", p);
200                 break;
201         }
202 }
203
204 static int __init parse_memmap_opt(char *str)
205 {
206         while (str) {
207                 char *k = strchr(str, ',');
208
209                 if (k)
210                         *k++ = 0;
211
212                 parse_memmap_one(str);
213                 str = k;
214         }
215
216         return 0;
217 }
218 early_param("memmap", parse_memmap_opt);