[mirror_ubuntu-jammy-kernel.git] / arch / sh / mm / init.c

/*
 * linux/arch/sh/mm/init.c
 *
 *  Copyright (C) 1999  Niibe Yutaka
 *  Copyright (C) 2002 - 2007  Paul Mundt
 *
 *  Based on linux/arch/i386/mm/init.c:
 *   Copyright (C) 1995  Linus Torvalds
 */
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/proc_fs.h>
#include <linux/pagemap.h>
#include <linux/percpu.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <asm/mmu_context.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
#include <asm/cache.h>
#include <asm/sizes.h>

DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
pgd_t swapper_pg_dir[PTRS_PER_PGD];

#ifdef CONFIG_MMU
static pte_t *__get_pte_phys(unsigned long addr)
{
	pgd_t *pgd;
	pud_t *pud;
	pmd_t *pmd;
	pte_t *pte;

	pgd = pgd_offset_k(addr);
	if (pgd_none(*pgd)) {
		pgd_ERROR(*pgd);
		return NULL;
	}

	pud = pud_alloc(NULL, pgd, addr);
	if (unlikely(!pud)) {
		pud_ERROR(*pud);
		return NULL;
	}

	pmd = pmd_alloc(NULL, pud, addr);
	if (unlikely(!pmd)) {
		pmd_ERROR(*pmd);
		return NULL;
	}

	pte = pte_offset_kernel(pmd, addr);
	return pte;
}

static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
{
	pte_t *pte;

	pte = __get_pte_phys(addr);
	if (!pte_none(*pte)) {
		pte_ERROR(*pte);
		return;
	}

	set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
	local_flush_tlb_one(get_asid(), addr);

	if (pgprot_val(prot) & _PAGE_WIRED)
		tlb_wire_entry(NULL, addr, *pte);
}

static void clear_pte_phys(unsigned long addr, pgprot_t prot)
{
	pte_t *pte;

	pte = __get_pte_phys(addr);

	if (pgprot_val(prot) & _PAGE_WIRED)
		tlb_unwire_entry();

	set_pte(pte, pfn_pte(0, __pgprot(0)));
	local_flush_tlb_one(get_asid(), addr);
}

void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
	unsigned long address = __fix_to_virt(idx);

	if (idx >= __end_of_fixed_addresses) {
		BUG();
		return;
	}

	set_pte_phys(address, phys, prot);
}

void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
{
	unsigned long address = __fix_to_virt(idx);

	if (idx >= __end_of_fixed_addresses) {
		BUG();
		return;
	}

	clear_pte_phys(address, prot);
}

void __init page_table_range_init(unsigned long start, unsigned long end,
					 pgd_t *pgd_base)
{
	pgd_t *pgd;
	pud_t *pud;
	pmd_t *pmd;
	pte_t *pte;
	int i, j, k;
	unsigned long vaddr;

	vaddr = start;
	i = __pgd_offset(vaddr);
	j = __pud_offset(vaddr);
	k = __pmd_offset(vaddr);
	pgd = pgd_base + i;

	for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
		pud = (pud_t *)pgd;
		for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
#ifdef __PAGETABLE_PMD_FOLDED
			pmd = (pmd_t *)pud;
#else
			pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
			pud_populate(&init_mm, pud, pmd);
			pmd += k;
#endif
			for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
				if (pmd_none(*pmd)) {
					pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
					pmd_populate_kernel(&init_mm, pmd, pte);
					BUG_ON(pte != pte_offset_kernel(pmd, 0));
				}
				vaddr += PMD_SIZE;
			}
			k = 0;
		}
		j = 0;
	}
}
#endif	/* CONFIG_MMU */

/*
 * paging_init() sets up the page tables
 */
void __init paging_init(void)
{
	unsigned long max_zone_pfns[MAX_NR_ZONES];
	unsigned long vaddr, end;
	int nid;

	/* We don't need to map the kernel through the TLB, as
	 * it is permanatly mapped using P1. So clear the
	 * entire pgd. */
	memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));

	/* Set an initial value for the MMU.TTB so we don't have to
	 * check for a null value. */
	set_TTB(swapper_pg_dir);

	/*
	 * Populate the relevant portions of swapper_pg_dir so that
	 * we can use the fixmap entries without calling kmalloc.
	 * pte's will be filled in by __set_fixmap().
	 */
	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
	end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
	page_table_range_init(vaddr, end, swapper_pg_dir);

	kmap_coherent_init();

	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));

	for_each_online_node(nid) {
		pg_data_t *pgdat = NODE_DATA(nid);
		unsigned long low, start_pfn;

		start_pfn = pgdat->bdata->node_min_pfn;
		low = pgdat->bdata->node_low_pfn;

		if (max_zone_pfns[ZONE_NORMAL] < low)
			max_zone_pfns[ZONE_NORMAL] = low;

		printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
		       nid, start_pfn, low);
	}

	free_area_init_nodes(max_zone_pfns);
}

/*
 * Early initialization for any I/O MMUs we might have.
 */
static void __init iommu_init(void)
{
	no_iommu_init();
}

unsigned int mem_init_done = 0;

void __init mem_init(void)
{
	int codesize, datasize, initsize;
	int nid;

	iommu_init();

	num_physpages = 0;
	high_memory = NULL;

	for_each_online_node(nid) {
		pg_data_t *pgdat = NODE_DATA(nid);
		unsigned long node_pages = 0;
		void *node_high_memory;

		num_physpages += pgdat->node_present_pages;

		if (pgdat->node_spanned_pages)
			node_pages = free_all_bootmem_node(pgdat);

		totalram_pages += node_pages;

		node_high_memory = (void *)__va((pgdat->node_start_pfn +
						 pgdat->node_spanned_pages) <<
						 PAGE_SHIFT);
		if (node_high_memory > high_memory)
			high_memory = node_high_memory;
	}

	/* Set this up early, so we can take care of the zero page */
	cpu_cache_init();

	/* clear the zero-page */
	memset(empty_zero_page, 0, PAGE_SIZE);
	__flush_wback_region(empty_zero_page, PAGE_SIZE);

	vsyscall_init();

	codesize =  (unsigned long) &_etext - (unsigned long) &_text;
	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;

	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
	       "%dk data, %dk init)\n",
		nr_free_pages() << (PAGE_SHIFT-10),
		num_physpages << (PAGE_SHIFT-10),
		codesize >> 10,
		datasize >> 10,
		initsize >> 10);

	printk(KERN_INFO "virtual kernel memory layout:\n"
		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
#ifdef CONFIG_HIGHMEM
		"    pkmap   : 0x%08lx - 0x%08lx   (%4ld kB)\n"
#endif
		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
		"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB) (cached)\n"
#ifdef CONFIG_UNCACHED_MAPPING
		"            : 0x%08lx - 0x%08lx   (%4ld MB) (uncached)\n"
#endif
		"      .init : 0x%08lx - 0x%08lx   (%4ld kB)\n"
		"      .data : 0x%08lx - 0x%08lx   (%4ld kB)\n"
		"      .text : 0x%08lx - 0x%08lx   (%4ld kB)\n",
		FIXADDR_START, FIXADDR_TOP,
		(FIXADDR_TOP - FIXADDR_START) >> 10,

#ifdef CONFIG_HIGHMEM
		PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
		(LAST_PKMAP*PAGE_SIZE) >> 10,
#endif

		(unsigned long)VMALLOC_START, VMALLOC_END,
		(VMALLOC_END - VMALLOC_START) >> 20,

		(unsigned long)memory_start, (unsigned long)high_memory,
		((unsigned long)high_memory - (unsigned long)memory_start) >> 20,

#ifdef CONFIG_UNCACHED_MAPPING
		uncached_start, uncached_end, uncached_size >> 20,
#endif

		(unsigned long)&__init_begin, (unsigned long)&__init_end,
		((unsigned long)&__init_end -
		 (unsigned long)&__init_begin) >> 10,

		(unsigned long)&_etext, (unsigned long)&_edata,
		((unsigned long)&_edata - (unsigned long)&_etext) >> 10,

		(unsigned long)&_text, (unsigned long)&_etext,
		((unsigned long)&_etext - (unsigned long)&_text) >> 10);

	mem_init_done = 1;
}

void free_initmem(void)
{
	unsigned long addr;

	addr = (unsigned long)(&__init_begin);
	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
		ClearPageReserved(virt_to_page(addr));
		init_page_count(virt_to_page(addr));
		free_page(addr);
		totalram_pages++;
	}
	printk("Freeing unused kernel memory: %ldk freed\n",
	       ((unsigned long)&__init_end -
	        (unsigned long)&__init_begin) >> 10);
}

#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
	unsigned long p;
	for (p = start; p < end; p += PAGE_SIZE) {
		ClearPageReserved(virt_to_page(p));
		init_page_count(virt_to_page(p));
		free_page(p);
		totalram_pages++;
	}
	printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
}
#endif

#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size)
{
	pg_data_t *pgdat;
	unsigned long start_pfn = start >> PAGE_SHIFT;
	unsigned long nr_pages = size >> PAGE_SHIFT;
	int ret;

	pgdat = NODE_DATA(nid);

	/* We only have ZONE_NORMAL, so this is easy.. */
	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
				start_pfn, nr_pages);
	if (unlikely(ret))
		printk("%s: Failed, __add_pages() == %d\n", __func__, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(arch_add_memory);

#ifdef CONFIG_NUMA
int memory_add_physaddr_to_nid(u64 addr)
{
	/* Node 0 for now.. */
	return 0;
}
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif

#endif /* CONFIG_MEMORY_HOTPLUG */
Commit	Line	Data
01066625 PM	1	/*
01066625 PM	2	* linux/arch/sh/mm/init.c
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (C) 1999 Niibe Yutaka
01066625	5	* Copyright (C) 2002 - 2007 Paul Mundt
1da177e4 LT	6	*
	7	* Based on linux/arch/i386/mm/init.c:
	8	* Copyright (C) 1995 Linus Torvalds
	9	*/
1da177e4 LT	10	#include <linux/mm.h>
1da177e4 LT	11	#include <linux/swap.h>
1da177e4	12	#include <linux/init.h>
1da177e4	13	#include <linux/bootmem.h>
2cb7ce3b	14	#include <linux/proc_fs.h>
27641dee	15	#include <linux/pagemap.h>
01066625 PM	16	#include <linux/percpu.h>
01066625 PM	17	#include <linux/io.h>
94c28510	18	#include <linux/dma-mapping.h>
1da177e4	19	#include <asm/mmu_context.h>
1da177e4 LT	20	#include <asm/tlb.h>
1da177e4 LT	21	#include <asm/cacheflush.h>
07cbb41b	22	#include <asm/sections.h>
1da177e4	23	#include <asm/cache.h>
b0f3ae03	24	#include <asm/sizes.h>
1da177e4 LT	25
	26	DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
	27	pgd_t swapper_pg_dir[PTRS_PER_PGD];
c6feb614	28
11cbb70e	29	#ifdef CONFIG_MMU
07cad4dc	30	static pte_t *__get_pte_phys(unsigned long addr)
1da177e4 LT	31	{
1da177e4 LT	32	pgd_t *pgd;
26ff6c11	33	pud_t *pud;
1da177e4 LT	34	pmd_t *pmd;
	35	pte_t *pte;
	36
99a596f9	37	pgd = pgd_offset_k(addr);
1da177e4 LT	38	if (pgd_none(*pgd)) {
1da177e4 LT	39	pgd_ERROR(*pgd);
07cad4dc	40	return NULL;
1da177e4 LT	41	}
1da177e4 LT	42
99a596f9 SM	43	pud = pud_alloc(NULL, pgd, addr);
	44	if (unlikely(!pud)) {
	45	pud_ERROR(*pud);
07cad4dc	46	return NULL;
26ff6c11 PM	47	}
26ff6c11 PM	48
99a596f9 SM	49	pmd = pmd_alloc(NULL, pud, addr);
	50	if (unlikely(!pmd)) {
	51	pmd_ERROR(*pmd);
07cad4dc	52	return NULL;
1da177e4 LT	53	}
	54
	55	pte = pte_offset_kernel(pmd, addr);
07cad4dc MF	56	return pte;
	57	}
	58
	59	static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
	60	{
	61	pte_t *pte;
	62
	63	pte = __get_pte_phys(addr);
1da177e4 LT	64	if (!pte_none(*pte)) {
	65	pte_ERROR(*pte);
	66	return;
	67	}
	68
	69	set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
997d0030	70	local_flush_tlb_one(get_asid(), addr);
07cad4dc MF	71
	72	if (pgprot_val(prot) & _PAGE_WIRED)
	73	tlb_wire_entry(NULL, addr, *pte);
	74	}
	75
	76	static void clear_pte_phys(unsigned long addr, pgprot_t prot)
	77	{
	78	pte_t *pte;
	79
	80	pte = __get_pte_phys(addr);
	81
	82	if (pgprot_val(prot) & _PAGE_WIRED)
	83	tlb_unwire_entry();
	84
	85	set_pte(pte, pfn_pte(0, __pgprot(0)));
	86	local_flush_tlb_one(get_asid(), addr);
1da177e4 LT	87	}
1da177e4 LT	88
1da177e4 LT	89	void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
	90	{
	91	unsigned long address = __fix_to_virt(idx);
	92
	93	if (idx >= __end_of_fixed_addresses) {
	94	BUG();
	95	return;
	96	}
	97
	98	set_pte_phys(address, phys, prot);
	99	}
2adb4e10	100
07cad4dc MF	101	void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
	102	{
	103	unsigned long address = __fix_to_virt(idx);
	104
	105	if (idx >= __end_of_fixed_addresses) {
	106	BUG();
	107	return;
	108	}
	109
	110	clear_pte_phys(address, prot);
	111	}
	112
2adb4e10 SM	113	void __init page_table_range_init(unsigned long start, unsigned long end,
	114	pgd_t *pgd_base)
	115	{
	116	pgd_t *pgd;
	117	pud_t *pud;
	118	pmd_t *pmd;
0906a3ad PM	119	pte_t *pte;
0906a3ad PM	120	int i, j, k;
2adb4e10 SM	121	unsigned long vaddr;
2adb4e10 SM	122
0906a3ad PM	123	vaddr = start;
	124	i = __pgd_offset(vaddr);
	125	j = __pud_offset(vaddr);
	126	k = __pmd_offset(vaddr);
	127	pgd = pgd_base + i;
	128
	129	for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
	130	pud = (pud_t *)pgd;
	131	for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
5d9b4b19	132	#ifdef __PAGETABLE_PMD_FOLDED
0906a3ad	133	pmd = (pmd_t *)pud;
5d9b4b19 MF	134	#else
	135	pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
	136	pud_populate(&init_mm, pud, pmd);
	137	pmd += k;
	138	#endif
0906a3ad PM	139	for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
	140	if (pmd_none(*pmd)) {
	141	pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
	142	pmd_populate_kernel(&init_mm, pmd, pte);
	143	BUG_ON(pte != pte_offset_kernel(pmd, 0));
	144	}
	145	vaddr += PMD_SIZE;
	146	}
	147	k = 0;
2adb4e10	148	}
0906a3ad	149	j = 0;
2adb4e10 SM	150	}
2adb4e10 SM	151	}
11cbb70e	152	#endif /* CONFIG_MMU */
1da177e4	153
1da177e4 LT	154	/*
1da177e4 LT	155	* paging_init() sets up the page tables
1da177e4 LT	156	*/
	157	void __init paging_init(void)
	158	{
2de212eb	159	unsigned long max_zone_pfns[MAX_NR_ZONES];
0906a3ad	160	unsigned long vaddr, end;
01066625	161	int nid;
1da177e4	162
01066625 PM	163	/* We don't need to map the kernel through the TLB, as
	164	* it is permanatly mapped using P1. So clear the
	165	* entire pgd. */
	166	memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
1da177e4	167
6e4662ff SM	168	/* Set an initial value for the MMU.TTB so we don't have to
	169	* check for a null value. */
	170	set_TTB(swapper_pg_dir);
	171
acca4f4d PM	172	/*
acca4f4d PM	173	* Populate the relevant portions of swapper_pg_dir so that
2adb4e10	174	* we can use the fixmap entries without calling kmalloc.
acca4f4d PM	175	* pte's will be filled in by __set_fixmap().
	176	*/
	177	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
0906a3ad PM	178	end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
0906a3ad PM	179	page_table_range_init(vaddr, end, swapper_pg_dir);
acca4f4d PM	180
acca4f4d PM	181	kmap_coherent_init();
2adb4e10	182
2de212eb PM	183	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
2de212eb PM	184
01066625 PM	185	for_each_online_node(nid) {
01066625 PM	186	pg_data_t *pgdat = NODE_DATA(nid);
01066625 PM	187	unsigned long low, start_pfn;
01066625 PM	188
3560e249	189	start_pfn = pgdat->bdata->node_min_pfn;
01066625 PM	190	low = pgdat->bdata->node_low_pfn;
01066625 PM	191
2de212eb PM	192	if (max_zone_pfns[ZONE_NORMAL] < low)
2de212eb PM	193	max_zone_pfns[ZONE_NORMAL] = low;
01066625 PM	194
	195	printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
	196	nid, start_pfn, low);
01066625	197	}
2de212eb PM	198
2de212eb PM	199	free_area_init_nodes(max_zone_pfns);
1da177e4 LT	200	}
1da177e4 LT	201
94c28510 PM	202	/*
	203	* Early initialization for any I/O MMUs we might have.
	204	*/
	205	static void __init iommu_init(void)
	206	{
	207	no_iommu_init();
	208	}
	209
d9b9487a PM	210	unsigned int mem_init_done = 0;
d9b9487a PM	211
1da177e4 LT	212	void __init mem_init(void)
1da177e4 LT	213	{
dfbb9042	214	int codesize, datasize, initsize;
01066625	215	int nid;
1da177e4	216
94c28510 PM	217	iommu_init();
94c28510 PM	218
2de212eb PM	219	num_physpages = 0;
	220	high_memory = NULL;
	221
01066625 PM	222	for_each_online_node(nid) {
	223	pg_data_t *pgdat = NODE_DATA(nid);
	224	unsigned long node_pages = 0;
	225	void *node_high_memory;
01066625 PM	226
	227	num_physpages += pgdat->node_present_pages;
	228
	229	if (pgdat->node_spanned_pages)
	230	node_pages = free_all_bootmem_node(pgdat);
	231
	232	totalram_pages += node_pages;
1da177e4	233
2de212eb PM	234	node_high_memory = (void *)__va((pgdat->node_start_pfn +
	235	pgdat->node_spanned_pages) <<
	236	PAGE_SHIFT);
01066625 PM	237	if (node_high_memory > high_memory)
	238	high_memory = node_high_memory;
	239	}
1da177e4	240
37443ef3 PM	241	/* Set this up early, so we can take care of the zero page */
	242	cpu_cache_init();
	243
1da177e4 LT	244	/* clear the zero-page */
	245	memset(empty_zero_page, 0, PAGE_SIZE);
	246	__flush_wback_region(empty_zero_page, PAGE_SIZE);
	247
35f99c0d PM	248	vsyscall_init();
35f99c0d PM	249
1da177e4 LT	250	codesize = (unsigned long) &_etext - (unsigned long) &_text;
	251	datasize = (unsigned long) &_edata - (unsigned long) &_etext;
	252	initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
	253
2cb7ce3b	254	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
dfbb9042	255	"%dk data, %dk init)\n",
cc013a88	256	nr_free_pages() << (PAGE_SHIFT-10),
2de212eb	257	num_physpages << (PAGE_SHIFT-10),
1da177e4	258	codesize >> 10,
1da177e4 LT	259	datasize >> 10,
	260	initsize >> 10);
	261
35f99c0d PM	262	printk(KERN_INFO "virtual kernel memory layout:\n"
	263	" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
	264	#ifdef CONFIG_HIGHMEM
	265	" pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
	266	#endif
	267	" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
3125ee72	268	" lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n"
b0f3ae03	269	#ifdef CONFIG_UNCACHED_MAPPING
3125ee72	270	" : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n"
b0f3ae03	271	#endif
35f99c0d PM	272	" .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
	273	" .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
	274	" .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
	275	FIXADDR_START, FIXADDR_TOP,
	276	(FIXADDR_TOP - FIXADDR_START) >> 10,
	277
	278	#ifdef CONFIG_HIGHMEM
	279	PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
	280	(LAST_PKMAP*PAGE_SIZE) >> 10,
	281	#endif
	282
	283	(unsigned long)VMALLOC_START, VMALLOC_END,
	284	(VMALLOC_END - VMALLOC_START) >> 20,
	285
	286	(unsigned long)memory_start, (unsigned long)high_memory,
	287	((unsigned long)high_memory - (unsigned long)memory_start) >> 20,
	288
b0f3ae03	289	#ifdef CONFIG_UNCACHED_MAPPING
9edef286	290	uncached_start, uncached_end, uncached_size >> 20,
b0f3ae03	291	#endif
3125ee72	292
35f99c0d PM	293	(unsigned long)&__init_begin, (unsigned long)&__init_end,
	294	((unsigned long)&__init_end -
	295	(unsigned long)&__init_begin) >> 10,
	296
	297	(unsigned long)&_etext, (unsigned long)&_edata,
	298	((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
	299
	300	(unsigned long)&_text, (unsigned long)&_etext,
	301	((unsigned long)&_etext - (unsigned long)&_text) >> 10);
d9b9487a PM	302
d9b9487a PM	303	mem_init_done = 1;
1da177e4 LT	304	}
	305
	306	void free_initmem(void)
	307	{
	308	unsigned long addr;
65463b73	309
1da177e4 LT	310	addr = (unsigned long)(&__init_begin);
	311	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
	312	ClearPageReserved(virt_to_page(addr));
7835e98b	313	init_page_count(virt_to_page(addr));
1da177e4 LT	314	free_page(addr);
	315	totalram_pages++;
	316	}
07cbb41b PM	317	printk("Freeing unused kernel memory: %ldk freed\n",
	318	((unsigned long)&__init_end -
	319	(unsigned long)&__init_begin) >> 10);
1da177e4 LT	320	}
	321
	322	#ifdef CONFIG_BLK_DEV_INITRD
	323	void free_initrd_mem(unsigned long start, unsigned long end)
	324	{
	325	unsigned long p;
	326	for (p = start; p < end; p += PAGE_SIZE) {
	327	ClearPageReserved(virt_to_page(p));
7835e98b	328	init_page_count(virt_to_page(p));
1da177e4 LT	329	free_page(p);
	330	totalram_pages++;
	331	}
2de212eb	332	printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
1da177e4 LT	333	}
1da177e4 LT	334	#endif
33d63bd8 PM	335
33d63bd8 PM	336	#ifdef CONFIG_MEMORY_HOTPLUG
33d63bd8 PM	337	int arch_add_memory(int nid, u64 start, u64 size)
	338	{
	339	pg_data_t *pgdat;
	340	unsigned long start_pfn = start >> PAGE_SHIFT;
	341	unsigned long nr_pages = size >> PAGE_SHIFT;
	342	int ret;
	343
	344	pgdat = NODE_DATA(nid);
	345
	346	/* We only have ZONE_NORMAL, so this is easy.. */
c04fc586 GH	347	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
c04fc586 GH	348	start_pfn, nr_pages);
33d63bd8	349	if (unlikely(ret))
866e6b9e	350	printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
33d63bd8 PM	351
	352	return ret;
	353	}
	354	EXPORT_SYMBOL_GPL(arch_add_memory);
	355
357d5946	356	#ifdef CONFIG_NUMA
33d63bd8 PM	357	int memory_add_physaddr_to_nid(u64 addr)
	358	{
	359	/* Node 0 for now.. */
	360	return 0;
	361	}
	362	EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
	363	#endif
1f69b6af	364
3159e7d6	365	#endif /* CONFIG_MEMORY_HOTPLUG */