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2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a 
 kernel/arch/mips/kernel/setup.c
....@@ -11,11 +11,12 @@
1111  * Copyright (C) 2000, 2001, 2002, 2007	 Maciej W. Rozycki
1212  */
1313 #include <linux/init.h>
14
+#include <linux/cpu.h>
15
+#include <linux/delay.h>
1416 #include <linux/ioport.h>
1517 #include <linux/export.h>
1618 #include <linux/screen_info.h>
1719 #include <linux/memblock.h>
18
-#include <linux/bootmem.h>
1920 #include <linux/initrd.h>
2021 #include <linux/root_dev.h>
2122 #include <linux/highmem.h>
....@@ -25,9 +26,11 @@
2526 #include <linux/kexec.h>
2627 #include <linux/sizes.h>
2728 #include <linux/device.h>
28
-#include <linux/dma-contiguous.h>
29
+#include <linux/dma-map-ops.h>
2930 #include <linux/decompress/generic.h>
3031 #include <linux/of_fdt.h>
32
+#include <linux/of_reserved_mem.h>
33
+#include <linux/dmi.h>
3134 
3235 #include <asm/addrspace.h>
3336 #include <asm/bootinfo.h>
....@@ -43,7 +46,7 @@
4346 #include <asm/prom.h>
4447 
4548 #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
46
-const char __section(.appended_dtb) __appended_dtb[0x100000];
49
+const char __section(".appended_dtb") __appended_dtb[0x100000];
4750 #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
4851 
4952 struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
....@@ -63,13 +66,13 @@
6366 
6467 EXPORT_SYMBOL(mips_machtype);
6568 
66
-struct boot_mem_map boot_mem_map;
67
-
6869 static char __initdata command_line[COMMAND_LINE_SIZE];
6970 char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
7071 
7172 #ifdef CONFIG_CMDLINE_BOOL
72
-static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
73
+static const char builtin_cmdline[] __initconst = CONFIG_CMDLINE;
74
+#else
75
+static const char builtin_cmdline[] __initconst = "";
7376 #endif
7477 
7578 /*
....@@ -90,58 +93,6 @@
9093 EXPORT_SYMBOL(ARCH_PFN_OFFSET);
9194 #endif
9295 
93
-void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
94
-{
95
-	int x = boot_mem_map.nr_map;
96
-	int i;
97
-
98
-	/*
99
-	 * If the region reaches the top of the physical address space, adjust
100
-	 * the size slightly so that (start + size) doesn't overflow
101
-	 */
102
-	if (start + size - 1 == PHYS_ADDR_MAX)
103
-		--size;
104
-
105
-	/* Sanity check */
106
-	if (start + size < start) {
107
-		pr_warn("Trying to add an invalid memory region, skipped\n");
108
-		return;
109
-	}
110
-
111
-	/*
112
-	 * Try to merge with existing entry, if any.
113
-	 */
114
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
115
-		struct boot_mem_map_entry *entry = boot_mem_map.map + i;
116
-		unsigned long top;
117
-
118
-		if (entry->type != type)
119
-			continue;
120
-
121
-		if (start + size < entry->addr)
122
-			continue;			/* no overlap */
123
-
124
-		if (entry->addr + entry->size < start)
125
-			continue;			/* no overlap */
126
-
127
-		top = max(entry->addr + entry->size, start + size);
128
-		entry->addr = min(entry->addr, start);
129
-		entry->size = top - entry->addr;
130
-
131
-		return;
132
-	}
133
-
134
-	if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) {
135
-		pr_err("Ooops! Too many entries in the memory map!\n");
136
-		return;
137
-	}
138
-
139
-	boot_mem_map.map[x].addr = start;
140
-	boot_mem_map.map[x].size = size;
141
-	boot_mem_map.map[x].type = type;
142
-	boot_mem_map.nr_map++;
143
-}
144
-
14596 void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
14697 {
14798 	void *dm = &detect_magic;
....@@ -158,67 +109,7 @@
158109 		((unsigned long long) sz_min) / SZ_1M,
159110 		((unsigned long long) sz_max) / SZ_1M);
160111 
161
-	add_memory_region(start, size, BOOT_MEM_RAM);
162
-}
163
-
164
-static bool __init __maybe_unused memory_region_available(phys_addr_t start,
165
-							  phys_addr_t size)
166
-{
167
-	int i;
168
-	bool in_ram = false, free = true;
169
-
170
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
171
-		phys_addr_t start_, end_;
172
-
173
-		start_ = boot_mem_map.map[i].addr;
174
-		end_ = boot_mem_map.map[i].addr + boot_mem_map.map[i].size;
175
-
176
-		switch (boot_mem_map.map[i].type) {
177
-		case BOOT_MEM_RAM:
178
-			if (start >= start_ && start + size <= end_)
179
-				in_ram = true;
180
-			break;
181
-		case BOOT_MEM_RESERVED:
182
-			if ((start >= start_ && start < end_) ||
183
-			    (start < start_ && start + size >= start_))
184
-				free = false;
185
-			break;
186
-		default:
187
-			continue;
188
-		}
189
-	}
190
-
191
-	return in_ram && free;
192
-}
193
-
194
-static void __init print_memory_map(void)
195
-{
196
-	int i;
197
-	const int field = 2 * sizeof(unsigned long);
198
-
199
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
200
-		printk(KERN_INFO " memory: %0*Lx @ %0*Lx ",
201
-		       field, (unsigned long long) boot_mem_map.map[i].size,
202
-		       field, (unsigned long long) boot_mem_map.map[i].addr);
203
-
204
-		switch (boot_mem_map.map[i].type) {
205
-		case BOOT_MEM_RAM:
206
-			printk(KERN_CONT "(usable)\n");
207
-			break;
208
-		case BOOT_MEM_INIT_RAM:
209
-			printk(KERN_CONT "(usable after init)\n");
210
-			break;
211
-		case BOOT_MEM_ROM_DATA:
212
-			printk(KERN_CONT "(ROM data)\n");
213
-			break;
214
-		case BOOT_MEM_RESERVED:
215
-			printk(KERN_CONT "(reserved)\n");
216
-			break;
217
-		default:
218
-			printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type);
219
-			break;
220
-		}
221
-	}
112
+	memblock_add(start, size);
222113 }
223114 
224115 /*
....@@ -265,10 +156,6 @@
265156 		pr_err("initrd start must be page aligned\n");
266157 		goto disable;
267158 	}
268
-	if (initrd_start < PAGE_OFFSET) {
269
-		pr_err("initrd start < PAGE_OFFSET\n");
270
-		goto disable;
271
-	}
272159 
273160 	/*
274161 	 * Sanitize initrd addresses. For example firmware
....@@ -280,6 +167,11 @@
280167 	end = __pa(initrd_end);
281168 	initrd_end = (unsigned long)__va(end);
282169 	initrd_start = (unsigned long)__va(__pa(initrd_start));
170
+
171
+	if (initrd_start < PAGE_OFFSET) {
172
+		pr_err("initrd start < PAGE_OFFSET\n");
173
+		goto disable;
174
+	}
283175 
284176 	ROOT_DEV = Root_RAM0;
285177 	return PFN_UP(end);
....@@ -333,7 +225,7 @@
333225 
334226 	maybe_bswap_initrd();
335227 
336
-	reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
228
+	memblock_reserve(__pa(initrd_start), size);
337229 	initrd_below_start_ok = 1;
338230 
339231 	pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
....@@ -360,7 +252,7 @@
360252  * Initialize the bootmem allocator. It also setup initrd related data
361253  * if needed.
362254  */
363
-#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA))
255
+#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA))
364256 
365257 static void __init bootmem_init(void)
366258 {
....@@ -370,21 +262,14 @@
370262 
371263 #else  /* !CONFIG_SGI_IP27 */
372264 
373
-static unsigned long __init bootmap_bytes(unsigned long pages)
374
-{
375
-	unsigned long bytes = DIV_ROUND_UP(pages, 8);
376
-
377
-	return ALIGN(bytes, sizeof(long));
378
-}
379
-
380265 static void __init bootmem_init(void)
381266 {
382
-	unsigned long reserved_end;
383
-	unsigned long mapstart = ~0UL;
384
-	unsigned long bootmap_size;
385
-	phys_addr_t ramstart = PHYS_ADDR_MAX;
386
-	bool bootmap_valid = false;
267
+	phys_addr_t ramstart, ramend;
268
+	unsigned long start, end;
387269 	int i;
270
+
271
+	ramstart = memblock_start_of_DRAM();
272
+	ramend = memblock_end_of_DRAM();
388273 
389274 	/*
390275 	 * Sanity check any INITRD first. We don't take it into account
....@@ -393,32 +278,32 @@
393278 	 * will reserve the area used for the initrd.
394279 	 */
395280 	init_initrd();
396
-	reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
397281 
282
+	/* Reserve memory occupied by kernel. */
283
+	memblock_reserve(__pa_symbol(&_text),
284
+			__pa_symbol(&_end) - __pa_symbol(&_text));
285
+
286
+	/* max_low_pfn is not a number of pages but the end pfn of low mem */
287
+
288
+#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
289
+	ARCH_PFN_OFFSET = PFN_UP(ramstart);
290
+#else
398291 	/*
399
-	 * max_low_pfn is not a number of pages. The number of pages
400
-	 * of the system is given by 'max_low_pfn - min_low_pfn'.
292
+	 * Reserve any memory between the start of RAM and PHYS_OFFSET
401293 	 */
402
-	min_low_pfn = ~0UL;
403
-	max_low_pfn = 0;
294
+	if (ramstart > PHYS_OFFSET)
295
+		memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
404296 
405
-	/*
406
-	 * Find the highest page frame number we have available
407
-	 * and the lowest used RAM address
408
-	 */
409
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
410
-		unsigned long start, end;
297
+	if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) {
298
+		pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
299
+			(unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)),
300
+			(unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET));
301
+	}
302
+#endif
411303 
412
-		if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
413
-			continue;
414
-
415
-		start = PFN_UP(boot_mem_map.map[i].addr);
416
-		end = PFN_DOWN(boot_mem_map.map[i].addr
417
-				+ boot_mem_map.map[i].size);
418
-
419
-		ramstart = min(ramstart, boot_mem_map.map[i].addr);
420
-
421
-#ifndef CONFIG_HIGHMEM
304
+	min_low_pfn = ARCH_PFN_OFFSET;
305
+	max_pfn = PFN_DOWN(ramend);
306
+	for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) {
422307 		/*
423308 		 * Skip highmem here so we get an accurate max_low_pfn if low
424309 		 * memory stops short of high memory.
....@@ -429,210 +314,22 @@
429314 			continue;
430315 		if (end > PFN_DOWN(HIGHMEM_START))
431316 			end = PFN_DOWN(HIGHMEM_START);
432
-#endif
433
-
434317 		if (end > max_low_pfn)
435318 			max_low_pfn = end;
436
-		if (start < min_low_pfn)
437
-			min_low_pfn = start;
438
-		if (end <= reserved_end)
439
-			continue;
440
-#ifdef CONFIG_BLK_DEV_INITRD
441
-		/* Skip zones before initrd and initrd itself */
442
-		if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end)))
443
-			continue;
444
-#endif
445
-		if (start >= mapstart)
446
-			continue;
447
-		mapstart = max(reserved_end, start);
448319 	}
449320 
450321 	if (min_low_pfn >= max_low_pfn)
451322 		panic("Incorrect memory mapping !!!");
452323 
453
-#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
454
-	ARCH_PFN_OFFSET = PFN_UP(ramstart);
455
-#else
456
-	/*
457
-	 * Reserve any memory between the start of RAM and PHYS_OFFSET
458
-	 */
459
-	if (ramstart > PHYS_OFFSET)
460
-		add_memory_region(PHYS_OFFSET, ramstart - PHYS_OFFSET,
461
-				  BOOT_MEM_RESERVED);
462
-
463
-	if (min_low_pfn > ARCH_PFN_OFFSET) {
464
-		pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
465
-			(min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
466
-			min_low_pfn - ARCH_PFN_OFFSET);
467
-	} else if (ARCH_PFN_OFFSET - min_low_pfn > 0UL) {
468
-		pr_info("%lu free pages won't be used\n",
469
-			ARCH_PFN_OFFSET - min_low_pfn);
470
-	}
471
-	min_low_pfn = ARCH_PFN_OFFSET;
472
-#endif
473
-
474
-	/*
475
-	 * Determine low and high memory ranges
476
-	 */
477
-	max_pfn = max_low_pfn;
478
-	if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
324
+	if (max_pfn > PFN_DOWN(HIGHMEM_START)) {
479325 #ifdef CONFIG_HIGHMEM
480326 		highstart_pfn = PFN_DOWN(HIGHMEM_START);
481
-		highend_pfn = max_low_pfn;
482
-#endif
327
+		highend_pfn = max_pfn;
328
+#else
483329 		max_low_pfn = PFN_DOWN(HIGHMEM_START);
484
-	}
485
-
486
-#ifdef CONFIG_BLK_DEV_INITRD
487
-	/*
488
-	 * mapstart should be after initrd_end
489
-	 */
490
-	if (initrd_end)
491
-		mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end)));
492
-#endif
493
-
494
-	/*
495
-	 * check that mapstart doesn't overlap with any of
496
-	 * memory regions that have been reserved through eg. DTB
497
-	 */
498
-	bootmap_size = bootmap_bytes(max_low_pfn - min_low_pfn);
499
-
500
-	bootmap_valid = memory_region_available(PFN_PHYS(mapstart),
501
-						bootmap_size);
502
-	for (i = 0; i < boot_mem_map.nr_map && !bootmap_valid; i++) {
503
-		unsigned long mapstart_addr;
504
-
505
-		switch (boot_mem_map.map[i].type) {
506
-		case BOOT_MEM_RESERVED:
507
-			mapstart_addr = PFN_ALIGN(boot_mem_map.map[i].addr +
508
-						boot_mem_map.map[i].size);
509
-			if (PHYS_PFN(mapstart_addr) < mapstart)
510
-				break;
511
-
512
-			bootmap_valid = memory_region_available(mapstart_addr,
513
-								bootmap_size);
514
-			if (bootmap_valid)
515
-				mapstart = PHYS_PFN(mapstart_addr);
516
-			break;
517
-		default:
518
-			break;
519
-		}
520
-	}
521
-
522
-	if (!bootmap_valid)
523
-		panic("No memory area to place a bootmap bitmap");
524
-
525
-	/*
526
-	 * Initialize the boot-time allocator with low memory only.
527
-	 */
528
-	if (bootmap_size != init_bootmem_node(NODE_DATA(0), mapstart,
529
-					 min_low_pfn, max_low_pfn))
530
-		panic("Unexpected memory size required for bootmap");
531
-
532
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
533
-		unsigned long start, end;
534
-
535
-		start = PFN_UP(boot_mem_map.map[i].addr);
536
-		end = PFN_DOWN(boot_mem_map.map[i].addr
537
-				+ boot_mem_map.map[i].size);
538
-
539
-		if (start <= min_low_pfn)
540
-			start = min_low_pfn;
541
-		if (start >= end)
542
-			continue;
543
-
544
-#ifndef CONFIG_HIGHMEM
545
-		if (end > max_low_pfn)
546
-			end = max_low_pfn;
547
-
548
-		/*
549
-		 * ... finally, is the area going away?
550
-		 */
551
-		if (end <= start)
552
-			continue;
553
-#endif
554
-
555
-		memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0);
556
-	}
557
-
558
-	/*
559
-	 * Register fully available low RAM pages with the bootmem allocator.
560
-	 */
561
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
562
-		unsigned long start, end, size;
563
-
564
-		start = PFN_UP(boot_mem_map.map[i].addr);
565
-		end   = PFN_DOWN(boot_mem_map.map[i].addr
566
-				    + boot_mem_map.map[i].size);
567
-
568
-		/*
569
-		 * Reserve usable memory.
570
-		 */
571
-		switch (boot_mem_map.map[i].type) {
572
-		case BOOT_MEM_RAM:
573
-			break;
574
-		case BOOT_MEM_INIT_RAM:
575
-			memory_present(0, start, end);
576
-			continue;
577
-		default:
578
-			/* Not usable memory */
579
-			if (start > min_low_pfn && end < max_low_pfn)
580
-				reserve_bootmem(boot_mem_map.map[i].addr,
581
-						boot_mem_map.map[i].size,
582
-						BOOTMEM_DEFAULT);
583
-			continue;
584
-		}
585
-
586
-		/*
587
-		 * We are rounding up the start address of usable memory
588
-		 * and at the end of the usable range downwards.
589
-		 */
590
-		if (start >= max_low_pfn)
591
-			continue;
592
-		if (start < reserved_end)
593
-			start = reserved_end;
594
-		if (end > max_low_pfn)
595
-			end = max_low_pfn;
596
-
597
-		/*
598
-		 * ... finally, is the area going away?
599
-		 */
600
-		if (end <= start)
601
-			continue;
602
-		size = end - start;
603
-
604
-		/* Register lowmem ranges */
605
-		free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
606
-		memory_present(0, start, end);
607
-	}
608
-
609
-	/*
610
-	 * Reserve the bootmap memory.
611
-	 */
612
-	reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
613
-
614
-#ifdef CONFIG_RELOCATABLE
615
-	/*
616
-	 * The kernel reserves all memory below its _end symbol as bootmem,
617
-	 * but the kernel may now be at a much higher address. The memory
618
-	 * between the original and new locations may be returned to the system.
619
-	 */
620
-	if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) {
621
-		unsigned long offset;
622
-		extern void show_kernel_relocation(const char *level);
623
-
624
-		offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS);
625
-		free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset);
626
-
627
-#if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO)
628
-		/*
629
-		 * This information is necessary when debugging the kernel
630
-		 * But is a security vulnerability otherwise!
631
-		 */
632
-		show_kernel_relocation(KERN_INFO);
330
+		max_pfn = max_low_pfn;
633331 #endif
634332 	}
635
-#endif
636333 
637334 	/*
638335 	 * Reserve initrd memory if needed.
....@@ -641,29 +338,6 @@
641338 }
642339 
643340 #endif	/* CONFIG_SGI_IP27 */
644
-
645
-/*
646
- * arch_mem_init - initialize memory management subsystem
647
- *
648
- *  o plat_mem_setup() detects the memory configuration and will record detected
649
- *    memory areas using add_memory_region.
650
- *
651
- * At this stage the memory configuration of the system is known to the
652
- * kernel but generic memory management system is still entirely uninitialized.
653
- *
654
- *  o bootmem_init()
655
- *  o sparse_init()
656
- *  o paging_init()
657
- *  o dma_contiguous_reserve()
658
- *
659
- * At this stage the bootmem allocator is ready to use.
660
- *
661
- * NOTE: historically plat_mem_setup did the entire platform initialization.
662
- *	 This was rather impractical because it meant plat_mem_setup had to
663
- * get away without any kind of memory allocator.  To keep old code from
664
- * breaking plat_setup was just renamed to plat_mem_setup and a second platform
665
- * initialization hook for anything else was introduced.
666
- */
667341 
668342 static int usermem __initdata;
669343 
....@@ -677,15 +351,16 @@
677351 	 * size.
678352 	 */
679353 	if (usermem == 0) {
680
-		boot_mem_map.nr_map = 0;
681354 		usermem = 1;
355
+		memblock_remove(memblock_start_of_DRAM(),
356
+			memblock_end_of_DRAM() - memblock_start_of_DRAM());
682357 	}
683358 	start = 0;
684359 	size = memparse(p, &p);
685360 	if (*p == '@')
686361 		start = memparse(p + 1, &p);
687362 
688
-	add_memory_region(start, size, BOOT_MEM_RAM);
363
+	memblock_add(start, size);
689364 
690365 	return 0;
691366 }
....@@ -711,13 +386,14 @@
711386 
712387 	if (*p == '@') {
713388 		start_at = memparse(p+1, &p);
714
-		add_memory_region(start_at, mem_size, BOOT_MEM_RAM);
389
+		memblock_add(start_at, mem_size);
715390 	} else if (*p == '#') {
716391 		pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n");
717392 		return -EINVAL;
718393 	} else if (*p == '$') {
719394 		start_at = memparse(p+1, &p);
720
-		add_memory_region(start_at, mem_size, BOOT_MEM_RESERVED);
395
+		memblock_add(start_at, mem_size);
396
+		memblock_reserve(start_at, mem_size);
721397 	} else {
722398 		pr_err("\"memmap\" invalid format!\n");
723399 		return -EINVAL;
....@@ -732,17 +408,15 @@
732408 early_param("memmap", early_parse_memmap);
733409 
734410 #ifdef CONFIG_PROC_VMCORE
735
-unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
411
+static unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
736412 static int __init early_parse_elfcorehdr(char *p)
737413 {
738
-	int i;
414
+	phys_addr_t start, end;
415
+	u64 i;
739416 
740417 	setup_elfcorehdr = memparse(p, &p);
741418 
742
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
743
-		unsigned long start = boot_mem_map.map[i].addr;
744
-		unsigned long end = (boot_mem_map.map[i].addr +
745
-				     boot_mem_map.map[i].size);
419
+	for_each_mem_range(i, &start, &end) {
746420 		if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
747421 			/*
748422 			 * Reserve from the elf core header to the end of
....@@ -762,33 +436,11 @@
762436 early_param("elfcorehdr", early_parse_elfcorehdr);
763437 #endif
764438 
765
-static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type)
766
-{
767
-	phys_addr_t size;
768
-	int i;
769
-
770
-	size = end - mem;
771
-	if (!size)
772
-		return;
773
-
774
-	/* Make sure it is in the boot_mem_map */
775
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
776
-		if (mem >= boot_mem_map.map[i].addr &&
777
-		    mem < (boot_mem_map.map[i].addr +
778
-			   boot_mem_map.map[i].size))
779
-			return;
780
-	}
781
-	add_memory_region(mem, size, type);
782
-}
783
-
784439 #ifdef CONFIG_KEXEC
785
-static inline unsigned long long get_total_mem(void)
786
-{
787
-	unsigned long long total;
788440 
789
-	total = max_pfn - min_low_pfn;
790
-	return total << PAGE_SHIFT;
791
-}
441
+/* 64M alignment for crash kernel regions */
442
+#define CRASH_ALIGN	SZ_64M
443
+#define CRASH_ADDR_MAX	SZ_512M
792444 
793445 static void __init mips_parse_crashkernel(void)
794446 {
....@@ -796,15 +448,28 @@
796448 	unsigned long long crash_size, crash_base;
797449 	int ret;
798450 
799
-	total_mem = get_total_mem();
451
+	total_mem = memblock_phys_mem_size();
800452 	ret = parse_crashkernel(boot_command_line, total_mem,
801453 				&crash_size, &crash_base);
802454 	if (ret != 0 || crash_size <= 0)
803455 		return;
804456 
805
-	if (!memory_region_available(crash_base, crash_size)) {
806
-		pr_warn("Invalid memory region reserved for crash kernel\n");
807
-		return;
457
+	if (crash_base <= 0) {
458
+		crash_base = memblock_find_in_range(CRASH_ALIGN, CRASH_ADDR_MAX,
459
+							crash_size, CRASH_ALIGN);
460
+		if (!crash_base) {
461
+			pr_warn("crashkernel reservation failed - No suitable area found.\n");
462
+			return;
463
+		}
464
+	} else {
465
+		unsigned long long start;
466
+
467
+		start = memblock_find_in_range(crash_base, crash_base + crash_size,
468
+						crash_size, 1);
469
+		if (start != crash_base) {
470
+			pr_warn("Invalid memory region reserved for crash kernel\n");
471
+			return;
472
+		}
808473 	}
809474 
810475 	crashk_res.start = crash_base;
....@@ -821,8 +486,7 @@
821486 	ret = request_resource(res, &crashk_res);
822487 	if (!ret)
823488 		pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
824
-			(unsigned long)((crashk_res.end -
825
-					 crashk_res.start + 1) >> 20),
489
+			(unsigned long)(resource_size(&crashk_res) >> 20),
826490 			(unsigned long)(crashk_res.start  >> 20));
827491 }
828492 #else /* !defined(CONFIG_KEXEC)		*/
....@@ -835,102 +499,175 @@
835499 }
836500 #endif /* !defined(CONFIG_KEXEC)  */
837501 
838
-#define USE_PROM_CMDLINE	IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER)
839
-#define USE_DTB_CMDLINE		IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB)
840
-#define EXTEND_WITH_PROM	IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)
841
-#define BUILTIN_EXTEND_WITH_PROM	\
842
-	IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)
502
+static void __init check_kernel_sections_mem(void)
503
+{
504
+	phys_addr_t start = __pa_symbol(&_text);
505
+	phys_addr_t size = __pa_symbol(&_end) - start;
843506 
507
+	if (!memblock_is_region_memory(start, size)) {
508
+		pr_info("Kernel sections are not in the memory maps\n");
509
+		memblock_add(start, size);
510
+	}
511
+}
512
+
513
+static void __init bootcmdline_append(const char *s, size_t max)
514
+{
515
+	if (!s[0] || !max)
516
+		return;
517
+
518
+	if (boot_command_line[0])
519
+		strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
520
+
521
+	strlcat(boot_command_line, s, max);
522
+}
523
+
524
+#ifdef CONFIG_OF_EARLY_FLATTREE
525
+
526
+static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname,
527
+					  int depth, void *data)
528
+{
529
+	bool *dt_bootargs = data;
530
+	const char *p;
531
+	int l;
532
+
533
+	if (depth != 1 || !data ||
534
+	    (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
535
+		return 0;
536
+
537
+	p = of_get_flat_dt_prop(node, "bootargs", &l);
538
+	if (p != NULL && l > 0) {
539
+		bootcmdline_append(p, min(l, COMMAND_LINE_SIZE));
540
+		*dt_bootargs = true;
541
+	}
542
+
543
+	return 1;
544
+}
545
+
546
+#endif /* CONFIG_OF_EARLY_FLATTREE */
547
+
548
+static void __init bootcmdline_init(void)
549
+{
550
+	bool dt_bootargs = false;
551
+
552
+	/*
553
+	 * If CMDLINE_OVERRIDE is enabled then initializing the command line is
554
+	 * trivial - we simply use the built-in command line unconditionally &
555
+	 * unmodified.
556
+	 */
557
+	if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
558
+		strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
559
+		return;
560
+	}
561
+
562
+	/*
563
+	 * If the user specified a built-in command line &
564
+	 * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
565
+	 * prepended to arguments from the bootloader or DT so we'll copy them
566
+	 * to the start of boot_command_line here. Otherwise, empty
567
+	 * boot_command_line to undo anything early_init_dt_scan_chosen() did.
568
+	 */
569
+	if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
570
+		strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
571
+	else
572
+		boot_command_line[0] = 0;
573
+
574
+#ifdef CONFIG_OF_EARLY_FLATTREE
575
+	/*
576
+	 * If we're configured to take boot arguments from DT, look for those
577
+	 * now.
578
+	 */
579
+	if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) ||
580
+	    IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND))
581
+		of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs);
582
+#endif
583
+
584
+	/*
585
+	 * If we didn't get any arguments from DT (regardless of whether that's
586
+	 * because we weren't configured to look for them, or because we looked
587
+	 * & found none) then we'll take arguments from the bootloader.
588
+	 * plat_mem_setup() should have filled arcs_cmdline with arguments from
589
+	 * the bootloader.
590
+	 */
591
+	if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs)
592
+		bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE);
593
+
594
+	/*
595
+	 * If the user specified a built-in command line & we didn't already
596
+	 * prepend it, we append it to boot_command_line here.
597
+	 */
598
+	if (IS_ENABLED(CONFIG_CMDLINE_BOOL) &&
599
+	    !IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
600
+		bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE);
601
+}
602
+
603
+/*
604
+ * arch_mem_init - initialize memory management subsystem
605
+ *
606
+ *  o plat_mem_setup() detects the memory configuration and will record detected
607
+ *    memory areas using memblock_add.
608
+ *
609
+ * At this stage the memory configuration of the system is known to the
610
+ * kernel but generic memory management system is still entirely uninitialized.
611
+ *
612
+ *  o bootmem_init()
613
+ *  o sparse_init()
614
+ *  o paging_init()
615
+ *  o dma_contiguous_reserve()
616
+ *
617
+ * At this stage the bootmem allocator is ready to use.
618
+ *
619
+ * NOTE: historically plat_mem_setup did the entire platform initialization.
620
+ *	 This was rather impractical because it meant plat_mem_setup had to
621
+ * get away without any kind of memory allocator.  To keep old code from
622
+ * breaking plat_setup was just renamed to plat_mem_setup and a second platform
623
+ * initialization hook for anything else was introduced.
624
+ */
844625 static void __init arch_mem_init(char **cmdline_p)
845626 {
846
-	struct memblock_region *reg;
847
-	extern void plat_mem_setup(void);
848
-
849
-	/*
850
-	 * Initialize boot_command_line to an innocuous but non-empty string in
851
-	 * order to prevent early_init_dt_scan_chosen() from copying
852
-	 * CONFIG_CMDLINE into it without our knowledge. We handle
853
-	 * CONFIG_CMDLINE ourselves below & don't want to duplicate its
854
-	 * content because repeating arguments can be problematic.
855
-	 */
856
-	strlcpy(boot_command_line, " ", COMMAND_LINE_SIZE);
857
-
858627 	/* call board setup routine */
859628 	plat_mem_setup();
629
+	memblock_set_bottom_up(true);
860630 
861
-	/*
862
-	 * Make sure all kernel memory is in the maps.  The "UP" and
863
-	 * "DOWN" are opposite for initdata since if it crosses over
864
-	 * into another memory section you don't want that to be
865
-	 * freed when the initdata is freed.
866
-	 */
867
-	arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
868
-			 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
869
-			 BOOT_MEM_RAM);
870
-	arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
871
-			 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
872
-			 BOOT_MEM_INIT_RAM);
873
-
874
-	pr_info("Determined physical RAM map:\n");
875
-	print_memory_map();
876
-
877
-#if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
878
-	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
879
-#else
880
-	if ((USE_PROM_CMDLINE && arcs_cmdline[0]) ||
881
-	    (USE_DTB_CMDLINE && !boot_command_line[0]))
882
-		strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
883
-
884
-	if (EXTEND_WITH_PROM && arcs_cmdline[0]) {
885
-		if (boot_command_line[0])
886
-			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
887
-		strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
888
-	}
889
-
890
-#if defined(CONFIG_CMDLINE_BOOL)
891
-	if (builtin_cmdline[0]) {
892
-		if (boot_command_line[0])
893
-			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
894
-		strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
895
-	}
896
-
897
-	if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) {
898
-		if (boot_command_line[0])
899
-			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
900
-		strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
901
-	}
902
-#endif
903
-#endif
631
+	bootcmdline_init();
904632 	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
905
-
906633 	*cmdline_p = command_line;
907634 
908635 	parse_early_param();
909636 
910
-	if (usermem) {
911
-		pr_info("User-defined physical RAM map:\n");
912
-		print_memory_map();
913
-	}
637
+	if (usermem)
638
+		pr_info("User-defined physical RAM map overwrite\n");
639
+
640
+	check_kernel_sections_mem();
914641 
915642 	early_init_fdt_reserve_self();
916643 	early_init_fdt_scan_reserved_mem();
917644 
645
+#ifndef CONFIG_NUMA
646
+	memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
647
+#endif
918648 	bootmem_init();
649
+
650
+	/*
651
+	 * Prevent memblock from allocating high memory.
652
+	 * This cannot be done before max_low_pfn is detected, so up
653
+	 * to this point is possible to only reserve physical memory
654
+	 * with memblock_reserve; memblock_alloc* can be used
655
+	 * only after this point
656
+	 */
657
+	memblock_set_current_limit(PFN_PHYS(max_low_pfn));
658
+
919659 #ifdef CONFIG_PROC_VMCORE
920660 	if (setup_elfcorehdr && setup_elfcorehdr_size) {
921661 		printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
922662 		       setup_elfcorehdr, setup_elfcorehdr_size);
923
-		reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
924
-				BOOTMEM_DEFAULT);
663
+		memblock_reserve(setup_elfcorehdr, setup_elfcorehdr_size);
925664 	}
926665 #endif
927666 
928667 	mips_parse_crashkernel();
929668 #ifdef CONFIG_KEXEC
930669 	if (crashk_res.start != crashk_res.end)
931
-		reserve_bootmem(crashk_res.start,
932
-				crashk_res.end - crashk_res.start + 1,
933
-				BOOTMEM_DEFAULT);
670
+		memblock_reserve(crashk_res.start, resource_size(&crashk_res));
934671 #endif
935672 	device_tree_init();
936673 
....@@ -947,18 +684,22 @@
947684 	plat_swiotlb_setup();
948685 
949686 	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
950
-	/* Tell bootmem about cma reserved memblock section */
951
-	for_each_memblock(reserved, reg)
952
-		if (reg->size != 0)
953
-			reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
954687 
955
-	reserve_bootmem_region(__pa_symbol(&__nosave_begin),
956
-			__pa_symbol(&__nosave_end)); /* Reserve for hibernation */
688
+	/* Reserve for hibernation. */
689
+	memblock_reserve(__pa_symbol(&__nosave_begin),
690
+		__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
691
+
692
+	fdt_init_reserved_mem();
693
+
694
+	memblock_dump_all();
695
+
696
+	early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));
957697 }
958698 
959699 static void __init resource_init(void)
960700 {
961
-	int i;
701
+	phys_addr_t start, end;
702
+	u64 i;
962703 
963704 	if (UNCAC_BASE != IO_BASE)
964705 		return;
....@@ -970,34 +711,23 @@
970711 	bss_resource.start = __pa_symbol(&__bss_start);
971712 	bss_resource.end = __pa_symbol(&__bss_stop) - 1;
972713 
973
-	for (i = 0; i < boot_mem_map.nr_map; i++) {
714
+	for_each_mem_range(i, &start, &end) {
974715 		struct resource *res;
975
-		unsigned long start, end;
976716 
977
-		start = boot_mem_map.map[i].addr;
978
-		end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
979
-		if (start >= HIGHMEM_START)
980
-			continue;
981
-		if (end >= HIGHMEM_START)
982
-			end = HIGHMEM_START - 1;
983
-
984
-		res = alloc_bootmem(sizeof(struct resource));
717
+		res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
718
+		if (!res)
719
+			panic("%s: Failed to allocate %zu bytes\n", __func__,
720
+			      sizeof(struct resource));
985721 
986722 		res->start = start;
987
-		res->end = end;
988
-		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
989
-
990
-		switch (boot_mem_map.map[i].type) {
991
-		case BOOT_MEM_RAM:
992
-		case BOOT_MEM_INIT_RAM:
993
-		case BOOT_MEM_ROM_DATA:
994
-			res->name = "System RAM";
995
-			res->flags |= IORESOURCE_SYSRAM;
996
-			break;
997
-		case BOOT_MEM_RESERVED:
998
-		default:
999
-			res->name = "reserved";
1000
-		}
723
+		/*
724
+		 * In memblock, end points to the first byte after the
725
+		 * range while in resourses, end points to the last byte in
726
+		 * the range.
727
+		 */
728
+		res->end = end - 1;
729
+		res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
730
+		res->name = "System RAM";
1001731 
1002732 		request_resource(&iomem_resource, res);
1003733 
....@@ -1048,12 +778,11 @@
1048778 #if defined(CONFIG_VT)
1049779 #if defined(CONFIG_VGA_CONSOLE)
1050780 	conswitchp = &vga_con;
1051
-#elif defined(CONFIG_DUMMY_CONSOLE)
1052
-	conswitchp = &dummy_con;
1053781 #endif
1054782 #endif
1055783 
1056784 	arch_mem_init(cmdline_p);
785
+	dmi_setup();
1057786 
1058787 	resource_init();
1059788 	plat_smp_setup();
....@@ -1074,22 +803,17 @@
1074803 struct dentry *mips_debugfs_dir;
1075804 static int __init debugfs_mips(void)
1076805 {
1077
-	struct dentry *d;
1078
-
1079
-	d = debugfs_create_dir("mips", NULL);
1080
-	if (!d)
1081
-		return -ENOMEM;
1082
-	mips_debugfs_dir = d;
806
+	mips_debugfs_dir = debugfs_create_dir("mips", NULL);
1083807 	return 0;
1084808 }
1085809 arch_initcall(debugfs_mips);
1086810 #endif
1087811 
1088
-#if defined(CONFIG_DMA_MAYBE_COHERENT) && !defined(CONFIG_DMA_PERDEV_COHERENT)
812
+#ifdef CONFIG_DMA_MAYBE_COHERENT
1089813 /* User defined DMA coherency from command line. */
1090814 enum coherent_io_user_state coherentio = IO_COHERENCE_DEFAULT;
1091815 EXPORT_SYMBOL_GPL(coherentio);
1092
-int hw_coherentio = 0;	/* Actual hardware supported DMA coherency setting. */
816
+int hw_coherentio;	/* Actual hardware supported DMA coherency setting. */
1093817 
1094818 static int __init setcoherentio(char *str)
1095819 {
....@@ -1107,3 +831,14 @@
1107831 }
1108832 early_param("nocoherentio", setnocoherentio);
1109833 #endif
834
+
835
+void __init arch_cpu_finalize_init(void)
836
+{
837
+	unsigned int cpu = smp_processor_id();
838
+
839
+	cpu_data[cpu].udelay_val = loops_per_jiffy;
840
+	check_bugs32();
841
+
842
+	if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
843
+		check_bugs64();
844
+}