[linux-2.6-block.git] / arch / arm64 / mm / init.c

/*
 * Based on arch/arm/mm/init.c
 *
 * Copyright (C) 1995-2005 Russell King
 * Copyright (C) 2012 ARM Ltd.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/errno.h>
#include <linux/swap.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/initrd.h>
#include <linux/gfp.h>
#include <linux/memblock.h>
#include <linux/sort.h>
#include <linux/of_fdt.h>
#include <linux/dma-mapping.h>
#include <linux/dma-contiguous.h>
#include <linux/efi.h>
#include <linux/swiotlb.h>

#include <asm/fixmap.h>
#include <asm/memory.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/sizes.h>
#include <asm/tlb.h>
#include <asm/alternative.h>

#include "mm.h"

phys_addr_t memstart_addr __read_mostly = 0;
phys_addr_t arm64_dma_phys_limit __read_mostly;

#ifdef CONFIG_BLK_DEV_INITRD
static int __init early_initrd(char *p)
{
	unsigned long start, size;
	char *endp;

	start = memparse(p, &endp);
	if (*endp == ',') {
		size = memparse(endp + 1, NULL);

		initrd_start = (unsigned long)__va(start);
		initrd_end = (unsigned long)__va(start + size);
	}
	return 0;
}
early_param("initrd", early_initrd);
#endif

/*
 * Return the maximum physical address for ZONE_DMA (DMA_BIT_MASK(32)). It
 * currently assumes that for memory starting above 4G, 32-bit devices will
 * use a DMA offset.
 */
static phys_addr_t max_zone_dma_phys(void)
{
	phys_addr_t offset = memblock_start_of_DRAM() & GENMASK_ULL(63, 32);
	return min(offset + (1ULL << 32), memblock_end_of_DRAM());
}

static void __init zone_sizes_init(unsigned long min, unsigned long max)
{
	struct memblock_region *reg;
	unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
	unsigned long max_dma = min;

	memset(zone_size, 0, sizeof(zone_size));

	/* 4GB maximum for 32-bit only capable devices */
#ifdef CONFIG_ZONE_DMA
	max_dma = PFN_DOWN(arm64_dma_phys_limit);
	zone_size[ZONE_DMA] = max_dma - min;
#endif
	zone_size[ZONE_NORMAL] = max - max_dma;

	memcpy(zhole_size, zone_size, sizeof(zhole_size));

	for_each_memblock(memory, reg) {
		unsigned long start = memblock_region_memory_base_pfn(reg);
		unsigned long end = memblock_region_memory_end_pfn(reg);

		if (start >= max)
			continue;

#ifdef CONFIG_ZONE_DMA
		if (start < max_dma) {
			unsigned long dma_end = min(end, max_dma);
			zhole_size[ZONE_DMA] -= dma_end - start;
		}
#endif
		if (end > max_dma) {
			unsigned long normal_end = min(end, max);
			unsigned long normal_start = max(start, max_dma);
			zhole_size[ZONE_NORMAL] -= normal_end - normal_start;
		}
	}

	free_area_init_node(0, zone_size, min, zhole_size);
}

#ifdef CONFIG_HAVE_ARCH_PFN_VALID
int pfn_valid(unsigned long pfn)
{
	return memblock_is_memory(pfn << PAGE_SHIFT);
}
EXPORT_SYMBOL(pfn_valid);
#endif

#ifndef CONFIG_SPARSEMEM
static void arm64_memory_present(void)
{
}
#else
static void arm64_memory_present(void)
{
	struct memblock_region *reg;

	for_each_memblock(memory, reg)
		memory_present(0, memblock_region_memory_base_pfn(reg),
			       memblock_region_memory_end_pfn(reg));
}
#endif

static phys_addr_t memory_limit = (phys_addr_t)ULLONG_MAX;

/*
 * Limit the memory size that was specified via FDT.
 */
static int __init early_mem(char *p)
{
	if (!p)
		return 1;

	memory_limit = memparse(p, &p) & PAGE_MASK;
	pr_notice("Memory limited to %lldMB\n", memory_limit >> 20);

	return 0;
}
early_param("mem", early_mem);

void __init arm64_memblock_init(void)
{
	memblock_enforce_memory_limit(memory_limit);

	/*
	 * Register the kernel text, kernel data, initrd, and initial
	 * pagetables with memblock.
	 */
	memblock_reserve(__pa(_text), _end - _text);
#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
		memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start);
#endif

	early_init_fdt_scan_reserved_mem();

	/* 4GB maximum for 32-bit only capable devices */
	if (IS_ENABLED(CONFIG_ZONE_DMA))
		arm64_dma_phys_limit = max_zone_dma_phys();
	else
		arm64_dma_phys_limit = PHYS_MASK + 1;
	dma_contiguous_reserve(arm64_dma_phys_limit);

	memblock_allow_resize();
	memblock_dump_all();
}

void __init bootmem_init(void)
{
	unsigned long min, max;

	min = PFN_UP(memblock_start_of_DRAM());
	max = PFN_DOWN(memblock_end_of_DRAM());

	early_memtest(min << PAGE_SHIFT, max << PAGE_SHIFT);

	/*
	 * Sparsemem tries to allocate bootmem in memory_present(), so must be
	 * done after the fixed reservations.
	 */
	arm64_memory_present();

	sparse_init();
	zone_sizes_init(min, max);

	high_memory = __va((max << PAGE_SHIFT) - 1) + 1;
	max_pfn = max_low_pfn = max;
}

#ifndef CONFIG_SPARSEMEM_VMEMMAP
static inline void free_memmap(unsigned long start_pfn, unsigned long end_pfn)
{
	struct page *start_pg, *end_pg;
	unsigned long pg, pgend;

	/*
	 * Convert start_pfn/end_pfn to a struct page pointer.
	 */
	start_pg = pfn_to_page(start_pfn - 1) + 1;
	end_pg = pfn_to_page(end_pfn - 1) + 1;

	/*
	 * Convert to physical addresses, and round start upwards and end
	 * downwards.
	 */
	pg = (unsigned long)PAGE_ALIGN(__pa(start_pg));
	pgend = (unsigned long)__pa(end_pg) & PAGE_MASK;

	/*
	 * If there are free pages between these, free the section of the
	 * memmap array.
	 */
	if (pg < pgend)
		free_bootmem(pg, pgend - pg);
}

/*
 * The mem_map array can get very big. Free the unused area of the memory map.
 */
static void __init free_unused_memmap(void)
{
	unsigned long start, prev_end = 0;
	struct memblock_region *reg;

	for_each_memblock(memory, reg) {
		start = __phys_to_pfn(reg->base);

#ifdef CONFIG_SPARSEMEM
		/*
		 * Take care not to free memmap entries that don't exist due
		 * to SPARSEMEM sections which aren't present.
		 */
		start = min(start, ALIGN(prev_end, PAGES_PER_SECTION));
#endif
		/*
		 * If we had a previous bank, and there is a space between the
		 * current bank and the previous, free it.
		 */
		if (prev_end && prev_end < start)
			free_memmap(prev_end, start);

		/*
		 * Align up here since the VM subsystem insists that the
		 * memmap entries are valid from the bank end aligned to
		 * MAX_ORDER_NR_PAGES.
		 */
		prev_end = ALIGN(__phys_to_pfn(reg->base + reg->size),
				 MAX_ORDER_NR_PAGES);
	}

#ifdef CONFIG_SPARSEMEM
	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
		free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION));
#endif
}
#endif	/* !CONFIG_SPARSEMEM_VMEMMAP */

/*
 * mem_init() marks the free areas in the mem_map and tells us how much memory
 * is free.  This is done after various parts of the system have claimed their
 * memory after the kernel image.
 */
void __init mem_init(void)
{
	swiotlb_init(1);

	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);

#ifndef CONFIG_SPARSEMEM_VMEMMAP
	free_unused_memmap();
#endif
	/* this will put all unused low memory onto the freelists */
	free_all_bootmem();

	mem_init_print_info(NULL);

#define MLK(b, t) b, t, ((t) - (b)) >> 10
#define MLM(b, t) b, t, ((t) - (b)) >> 20
#define MLG(b, t) b, t, ((t) - (b)) >> 30
#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)

	pr_notice("Virtual kernel memory layout:\n"
#ifdef CONFIG_KASAN
		  "    kasan   : 0x%16lx - 0x%16lx   (%6ld GB)\n"
#endif
		  "    vmalloc : 0x%16lx - 0x%16lx   (%6ld GB)\n"
#ifdef CONFIG_SPARSEMEM_VMEMMAP
		  "    vmemmap : 0x%16lx - 0x%16lx   (%6ld GB maximum)\n"
		  "              0x%16lx - 0x%16lx   (%6ld MB actual)\n"
#endif
		  "    fixed   : 0x%16lx - 0x%16lx   (%6ld KB)\n"
		  "    PCI I/O : 0x%16lx - 0x%16lx   (%6ld MB)\n"
		  "    modules : 0x%16lx - 0x%16lx   (%6ld MB)\n"
		  "    memory  : 0x%16lx - 0x%16lx   (%6ld MB)\n"
		  "      .init : 0x%p" " - 0x%p" "   (%6ld KB)\n"
		  "      .text : 0x%p" " - 0x%p" "   (%6ld KB)\n"
		  "      .data : 0x%p" " - 0x%p" "   (%6ld KB)\n",
#ifdef CONFIG_KASAN
		  MLG(KASAN_SHADOW_START, KASAN_SHADOW_END),
#endif
		  MLG(VMALLOC_START, VMALLOC_END),
#ifdef CONFIG_SPARSEMEM_VMEMMAP
		  MLG((unsigned long)vmemmap,
		      (unsigned long)vmemmap + VMEMMAP_SIZE),
		  MLM((unsigned long)virt_to_page(PAGE_OFFSET),
		      (unsigned long)virt_to_page(high_memory)),
#endif
		  MLK(FIXADDR_START, FIXADDR_TOP),
		  MLM(PCI_IO_START, PCI_IO_END),
		  MLM(MODULES_VADDR, MODULES_END),
		  MLM(PAGE_OFFSET, (unsigned long)high_memory),
		  MLK_ROUNDUP(__init_begin, __init_end),
		  MLK_ROUNDUP(_text, _etext),
		  MLK_ROUNDUP(_sdata, _edata));

#undef MLK
#undef MLM
#undef MLK_ROUNDUP

	/*
	 * Check boundaries twice: Some fundamental inconsistencies can be
	 * detected at build time already.
	 */
#ifdef CONFIG_COMPAT
	BUILD_BUG_ON(TASK_SIZE_32			> TASK_SIZE_64);
#endif
	BUILD_BUG_ON(TASK_SIZE_64			> MODULES_VADDR);
	BUG_ON(TASK_SIZE_64				> MODULES_VADDR);

	if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
		extern int sysctl_overcommit_memory;
		/*
		 * On a machine this small we won't get anywhere without
		 * overcommit, so turn it on by default.
		 */
		sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
	}
}

void free_initmem(void)
{
	fixup_init();
	free_initmem_default(0);
	free_alternatives_memory();
}

#ifdef CONFIG_BLK_DEV_INITRD

static int keep_initrd __initdata;

void __init free_initrd_mem(unsigned long start, unsigned long end)
{
	if (!keep_initrd)
		free_reserved_area((void *)start, (void *)end, 0, "initrd");
}

static int __init keepinitrd_setup(char *__unused)
{
	keep_initrd = 1;
	return 1;
}

__setup("keepinitrd", keepinitrd_setup);
#endif
Commit	Line	Data
c1cc1552 CM	1	/*
	2	* Based on arch/arm/mm/init.c
	3	*
	4	* Copyright (C) 1995-2005 Russell King
	5	* Copyright (C) 2012 ARM Ltd.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <linux/kernel.h>
	21	#include <linux/export.h>
	22	#include <linux/errno.h>
	23	#include <linux/swap.h>
	24	#include <linux/init.h>
	25	#include <linux/bootmem.h>
	26	#include <linux/mman.h>
	27	#include <linux/nodemask.h>
	28	#include <linux/initrd.h>
	29	#include <linux/gfp.h>
	30	#include <linux/memblock.h>
	31	#include <linux/sort.h>
	32	#include <linux/of_fdt.h>
19e7640d	33	#include <linux/dma-mapping.h>
6ac2104d	34	#include <linux/dma-contiguous.h>
86c8b27a	35	#include <linux/efi.h>
a1e50a82	36	#include <linux/swiotlb.h>
c1cc1552	37
08375198	38	#include <asm/fixmap.h>
aa03c428	39	#include <asm/memory.h>
c1cc1552 CM	40	#include <asm/sections.h>
	41	#include <asm/setup.h>
	42	#include <asm/sizes.h>
	43	#include <asm/tlb.h>
e039ee4e	44	#include <asm/alternative.h>
c1cc1552 CM	45
	46	#include "mm.h"
	47
c1cc1552	48	phys_addr_t memstart_addr __read_mostly = 0;
a1e50a82	49	phys_addr_t arm64_dma_phys_limit __read_mostly;
c1cc1552	50
ec2eaa73	51	#ifdef CONFIG_BLK_DEV_INITRD
c1cc1552 CM	52	static int __init early_initrd(char *p)
	53	{
	54	unsigned long start, size;
	55	char *endp;
	56
	57	start = memparse(p, &endp);
	58	if (*endp == ',') {
	59	size = memparse(endp + 1, NULL);
	60
ec2eaa73 RH	61	initrd_start = (unsigned long)__va(start);
ec2eaa73 RH	62	initrd_end = (unsigned long)__va(start + size);
c1cc1552 CM	63	}
	64	return 0;
	65	}
	66	early_param("initrd", early_initrd);
ec2eaa73	67	#endif
c1cc1552	68
d50314a6 CM	69	/*
	70	* Return the maximum physical address for ZONE_DMA (DMA_BIT_MASK(32)). It
	71	* currently assumes that for memory starting above 4G, 32-bit devices will
	72	* use a DMA offset.
	73	*/
	74	static phys_addr_t max_zone_dma_phys(void)
	75	{
	76	phys_addr_t offset = memblock_start_of_DRAM() & GENMASK_ULL(63, 32);
	77	return min(offset + (1ULL << 32), memblock_end_of_DRAM());
	78	}
	79
c1cc1552 CM	80	static void __init zone_sizes_init(unsigned long min, unsigned long max)
	81	{
	82	struct memblock_region *reg;
	83	unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
19e7640d	84	unsigned long max_dma = min;
c1cc1552 CM	85
	86	memset(zone_size, 0, sizeof(zone_size));
	87
c1cc1552	88	/* 4GB maximum for 32-bit only capable devices */
86a5906e RM	89	#ifdef CONFIG_ZONE_DMA
	90	max_dma = PFN_DOWN(arm64_dma_phys_limit);
	91	zone_size[ZONE_DMA] = max_dma - min;
	92	#endif
19e7640d	93	zone_size[ZONE_NORMAL] = max - max_dma;
c1cc1552 CM	94
	95	memcpy(zhole_size, zone_size, sizeof(zhole_size));
	96
	97	for_each_memblock(memory, reg) {
	98	unsigned long start = memblock_region_memory_base_pfn(reg);
	99	unsigned long end = memblock_region_memory_end_pfn(reg);
	100
	101	if (start >= max)
	102	continue;
19e7640d	103
86a5906e RM	104	#ifdef CONFIG_ZONE_DMA
86a5906e RM	105	if (start < max_dma) {
19e7640d CM	106	unsigned long dma_end = min(end, max_dma);
19e7640d CM	107	zhole_size[ZONE_DMA] -= dma_end - start;
c1cc1552	108	}
86a5906e	109	#endif
19e7640d	110	if (end > max_dma) {
c1cc1552	111	unsigned long normal_end = min(end, max);
19e7640d	112	unsigned long normal_start = max(start, max_dma);
c1cc1552 CM	113	zhole_size[ZONE_NORMAL] -= normal_end - normal_start;
	114	}
	115	}
	116
	117	free_area_init_node(0, zone_size, min, zhole_size);
	118	}
	119
	120	#ifdef CONFIG_HAVE_ARCH_PFN_VALID
	121	int pfn_valid(unsigned long pfn)
	122	{
	123	return memblock_is_memory(pfn << PAGE_SHIFT);
	124	}
	125	EXPORT_SYMBOL(pfn_valid);
	126	#endif
	127
	128	#ifndef CONFIG_SPARSEMEM
	129	static void arm64_memory_present(void)
	130	{
	131	}
	132	#else
	133	static void arm64_memory_present(void)
	134	{
	135	struct memblock_region *reg;
	136
	137	for_each_memblock(memory, reg)
	138	memory_present(0, memblock_region_memory_base_pfn(reg),
	139	memblock_region_memory_end_pfn(reg));
	140	}
	141	#endif
	142
6083fe74 MR	143	static phys_addr_t memory_limit = (phys_addr_t)ULLONG_MAX;
	144
	145	/*
	146	* Limit the memory size that was specified via FDT.
	147	*/
	148	static int __init early_mem(char *p)
	149	{
	150	if (!p)
	151	return 1;
	152
	153	memory_limit = memparse(p, &p) & PAGE_MASK;
	154	pr_notice("Memory limited to %lldMB\n", memory_limit >> 20);
	155
	156	return 0;
	157	}
	158	early_param("mem", early_mem);
	159
c1cc1552 CM	160	void __init arm64_memblock_init(void)
c1cc1552 CM	161	{
6083fe74 MR	162	memblock_enforce_memory_limit(memory_limit);
6083fe74 MR	163
bd00cd5f MR	164	/*
	165	* Register the kernel text, kernel data, initrd, and initial
	166	* pagetables with memblock.
	167	*/
c1cc1552 CM	168	memblock_reserve(__pa(_text), _end - _text);
c1cc1552 CM	169	#ifdef CONFIG_BLK_DEV_INITRD
ec2eaa73 RH	170	if (initrd_start)
ec2eaa73 RH	171	memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start);
c1cc1552 CM	172	#endif
c1cc1552 CM	173
0ceac9e0	174	early_init_fdt_scan_reserved_mem();
2d5a5612 CM	175
	176	/* 4GB maximum for 32-bit only capable devices */
	177	if (IS_ENABLED(CONFIG_ZONE_DMA))
a1e50a82 CM	178	arm64_dma_phys_limit = max_zone_dma_phys();
	179	else
	180	arm64_dma_phys_limit = PHYS_MASK + 1;
	181	dma_contiguous_reserve(arm64_dma_phys_limit);
6ac2104d	182
c1cc1552 CM	183	memblock_allow_resize();
	184	memblock_dump_all();
	185	}
	186
	187	void __init bootmem_init(void)
	188	{
	189	unsigned long min, max;
	190
	191	min = PFN_UP(memblock_start_of_DRAM());
	192	max = PFN_DOWN(memblock_end_of_DRAM());
	193
36dd9086 VM	194	early_memtest(min << PAGE_SHIFT, max << PAGE_SHIFT);
36dd9086 VM	195
c1cc1552 CM	196	/*
	197	* Sparsemem tries to allocate bootmem in memory_present(), so must be
	198	* done after the fixed reservations.
	199	*/
	200	arm64_memory_present();
	201
	202	sparse_init();
	203	zone_sizes_init(min, max);
	204
	205	high_memory = __va((max << PAGE_SHIFT) - 1) + 1;
	206	max_pfn = max_low_pfn = max;
	207	}
	208
c1cc1552 CM	209	#ifndef CONFIG_SPARSEMEM_VMEMMAP
	210	static inline void free_memmap(unsigned long start_pfn, unsigned long end_pfn)
	211	{
	212	struct page start_pg, end_pg;
	213	unsigned long pg, pgend;
	214
	215	/*
	216	* Convert start_pfn/end_pfn to a struct page pointer.
	217	*/
	218	start_pg = pfn_to_page(start_pfn - 1) + 1;
	219	end_pg = pfn_to_page(end_pfn - 1) + 1;
	220
	221	/*
	222	* Convert to physical addresses, and round start upwards and end
	223	* downwards.
	224	*/
	225	pg = (unsigned long)PAGE_ALIGN(__pa(start_pg));
	226	pgend = (unsigned long)__pa(end_pg) & PAGE_MASK;
	227
	228	/*
	229	* If there are free pages between these, free the section of the
	230	* memmap array.
	231	*/
	232	if (pg < pgend)
	233	free_bootmem(pg, pgend - pg);
	234	}
	235
	236	/*
	237	* The mem_map array can get very big. Free the unused area of the memory map.
	238	*/
	239	static void __init free_unused_memmap(void)
	240	{
	241	unsigned long start, prev_end = 0;
	242	struct memblock_region *reg;
	243
	244	for_each_memblock(memory, reg) {
	245	start = __phys_to_pfn(reg->base);
	246
	247	#ifdef CONFIG_SPARSEMEM
	248	/*
	249	* Take care not to free memmap entries that don't exist due
	250	* to SPARSEMEM sections which aren't present.
	251	*/
	252	start = min(start, ALIGN(prev_end, PAGES_PER_SECTION));
	253	#endif
	254	/*
	255	* If we had a previous bank, and there is a space between the
	256	* current bank and the previous, free it.
	257	*/
	258	if (prev_end && prev_end < start)
	259	free_memmap(prev_end, start);
	260
	261	/*
	262	* Align up here since the VM subsystem insists that the
	263	* memmap entries are valid from the bank end aligned to
	264	* MAX_ORDER_NR_PAGES.
	265	*/
b9bcc919	266	prev_end = ALIGN(__phys_to_pfn(reg->base + reg->size),
c1cc1552 CM	267	MAX_ORDER_NR_PAGES);
	268	}
	269
	270	#ifdef CONFIG_SPARSEMEM
	271	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
	272	free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION));
	273	#endif
	274	}
	275	#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
	276
	277	/*
	278	* mem_init() marks the free areas in the mem_map and tells us how much memory
	279	* is free. This is done after various parts of the system have claimed their
	280	* memory after the kernel image.
	281	*/
	282	void __init mem_init(void)
	283	{
a1e50a82 CM	284	swiotlb_init(1);
a1e50a82 CM	285
a6583c7c	286	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
c1cc1552 CM	287
c1cc1552 CM	288	#ifndef CONFIG_SPARSEMEM_VMEMMAP
c1cc1552 CM	289	free_unused_memmap();
c1cc1552 CM	290	#endif
bee4ebd1	291	/* this will put all unused low memory onto the freelists */
0c988534	292	free_all_bootmem();
c1cc1552	293
6879ea83	294	mem_init_print_info(NULL);
c1cc1552 CM	295
	296	#define MLK(b, t) b, t, ((t) - (b)) >> 10
	297	#define MLM(b, t) b, t, ((t) - (b)) >> 20
08375198	298	#define MLG(b, t) b, t, ((t) - (b)) >> 30
c1cc1552 CM	299	#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
	300
	301	pr_notice("Virtual kernel memory layout:\n"
ee7f881b LW	302	#ifdef CONFIG_KASAN
	303	" kasan : 0x%16lx - 0x%16lx (%6ld GB)\n"
	304	#endif
08375198	305	" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n"
c1cc1552	306	#ifdef CONFIG_SPARSEMEM_VMEMMAP
08375198 CM	307	" vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n"
08375198 CM	308	" 0x%16lx - 0x%16lx (%6ld MB actual)\n"
c1cc1552	309	#endif
08375198	310	" fixed : 0x%16lx - 0x%16lx (%6ld KB)\n"
aa03c428	311	" PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n"
c1cc1552 CM	312	" modules : 0x%16lx - 0x%16lx (%6ld MB)\n"
c1cc1552 CM	313	" memory : 0x%16lx - 0x%16lx (%6ld MB)\n"
08375198 CM	314	" .init : 0x%p" " - 0x%p" " (%6ld KB)\n"
	315	" .text : 0x%p" " - 0x%p" " (%6ld KB)\n"
	316	" .data : 0x%p" " - 0x%p" " (%6ld KB)\n",
ee7f881b LW	317	#ifdef CONFIG_KASAN
	318	MLG(KASAN_SHADOW_START, KASAN_SHADOW_END),
	319	#endif
08375198	320	MLG(VMALLOC_START, VMALLOC_END),
c1cc1552	321	#ifdef CONFIG_SPARSEMEM_VMEMMAP
08375198 CM	322	MLG((unsigned long)vmemmap,
08375198 CM	323	(unsigned long)vmemmap + VMEMMAP_SIZE),
c1cc1552 CM	324	MLM((unsigned long)virt_to_page(PAGE_OFFSET),
	325	(unsigned long)virt_to_page(high_memory)),
	326	#endif
08375198	327	MLK(FIXADDR_START, FIXADDR_TOP),
aa03c428	328	MLM(PCI_IO_START, PCI_IO_END),
c1cc1552 CM	329	MLM(MODULES_VADDR, MODULES_END),
c1cc1552 CM	330	MLM(PAGE_OFFSET, (unsigned long)high_memory),
c1cc1552 CM	331	MLK_ROUNDUP(__init_begin, __init_end),
	332	MLK_ROUNDUP(_text, _etext),
	333	MLK_ROUNDUP(_sdata, _edata));
	334
	335	#undef MLK
	336	#undef MLM
	337	#undef MLK_ROUNDUP
	338
	339	/*
	340	* Check boundaries twice: Some fundamental inconsistencies can be
	341	* detected at build time already.
	342	*/
	343	#ifdef CONFIG_COMPAT
	344	BUILD_BUG_ON(TASK_SIZE_32 > TASK_SIZE_64);
	345	#endif
	346	BUILD_BUG_ON(TASK_SIZE_64 > MODULES_VADDR);
	347	BUG_ON(TASK_SIZE_64 > MODULES_VADDR);
	348
bee4ebd1	349	if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
c1cc1552 CM	350	extern int sysctl_overcommit_memory;
	351	/*
	352	* On a machine this small we won't get anywhere without
	353	* overcommit, so turn it on by default.
	354	*/
	355	sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
	356	}
	357	}
	358
	359	void free_initmem(void)
	360	{
da141706	361	fixup_init();
9af5b807	362	free_initmem_default(0);
e039ee4e	363	free_alternatives_memory();
c1cc1552 CM	364	}
	365
	366	#ifdef CONFIG_BLK_DEV_INITRD
	367
662ba3db	368	static int keep_initrd __initdata;
c1cc1552	369
662ba3db	370	void __init free_initrd_mem(unsigned long start, unsigned long end)
c1cc1552	371	{
0145058c	372	if (!keep_initrd)
9af5b807	373	free_reserved_area((void )start, (void )end, 0, "initrd");
c1cc1552 CM	374	}
	375
	376	static int __init keepinitrd_setup(char *__unused)
	377	{
	378	keep_initrd = 1;
	379	return 1;
	380	}
	381
	382	__setup("keepinitrd", keepinitrd_setup);
	383	#endif