[net-next-2.6.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/gfp.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>
5a0e3ad6	13	#include <linux/gfp.h>
1da177e4	14	#include <linux/bootmem.h>
2cb7ce3b	15	#include <linux/proc_fs.h>
27641dee	16	#include <linux/pagemap.h>
01066625 PM	17	#include <linux/percpu.h>
01066625 PM	18	#include <linux/io.h>
94c28510	19	#include <linux/dma-mapping.h>
1da177e4	20	#include <asm/mmu_context.h>
1da177e4 LT	21	#include <asm/tlb.h>
1da177e4 LT	22	#include <asm/cacheflush.h>
07cbb41b	23	#include <asm/sections.h>
1da177e4	24	#include <asm/cache.h>
b0f3ae03	25	#include <asm/sizes.h>
1da177e4 LT	26
	27	DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
	28	pgd_t swapper_pg_dir[PTRS_PER_PGD];
c6feb614	29
11cbb70e	30	#ifdef CONFIG_MMU
07cad4dc	31	static pte_t *__get_pte_phys(unsigned long addr)
1da177e4 LT	32	{
1da177e4 LT	33	pgd_t *pgd;
26ff6c11	34	pud_t *pud;
1da177e4 LT	35	pmd_t *pmd;
	36	pte_t *pte;
	37
99a596f9	38	pgd = pgd_offset_k(addr);
1da177e4 LT	39	if (pgd_none(*pgd)) {
1da177e4 LT	40	pgd_ERROR(*pgd);
07cad4dc	41	return NULL;
1da177e4 LT	42	}
1da177e4 LT	43
99a596f9 SM	44	pud = pud_alloc(NULL, pgd, addr);
	45	if (unlikely(!pud)) {
	46	pud_ERROR(*pud);
07cad4dc	47	return NULL;
26ff6c11 PM	48	}
26ff6c11 PM	49
99a596f9 SM	50	pmd = pmd_alloc(NULL, pud, addr);
	51	if (unlikely(!pmd)) {
	52	pmd_ERROR(*pmd);
07cad4dc	53	return NULL;
1da177e4 LT	54	}
	55
	56	pte = pte_offset_kernel(pmd, addr);
07cad4dc MF	57	return pte;
	58	}
	59
	60	static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
	61	{
	62	pte_t *pte;
	63
	64	pte = __get_pte_phys(addr);
1da177e4 LT	65	if (!pte_none(*pte)) {
	66	pte_ERROR(*pte);
	67	return;
	68	}
	69
	70	set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
997d0030	71	local_flush_tlb_one(get_asid(), addr);
07cad4dc MF	72
	73	if (pgprot_val(prot) & _PAGE_WIRED)
	74	tlb_wire_entry(NULL, addr, *pte);
	75	}
	76
	77	static void clear_pte_phys(unsigned long addr, pgprot_t prot)
	78	{
	79	pte_t *pte;
	80
	81	pte = __get_pte_phys(addr);
	82
	83	if (pgprot_val(prot) & _PAGE_WIRED)
	84	tlb_unwire_entry();
	85
	86	set_pte(pte, pfn_pte(0, __pgprot(0)));
	87	local_flush_tlb_one(get_asid(), addr);
1da177e4 LT	88	}
1da177e4 LT	89
1da177e4 LT	90	void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
	91	{
	92	unsigned long address = __fix_to_virt(idx);
	93
	94	if (idx >= __end_of_fixed_addresses) {
	95	BUG();
	96	return;
	97	}
	98
	99	set_pte_phys(address, phys, prot);
	100	}
2adb4e10	101
07cad4dc MF	102	void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
	103	{
	104	unsigned long address = __fix_to_virt(idx);
	105
	106	if (idx >= __end_of_fixed_addresses) {
	107	BUG();
	108	return;
	109	}
	110
	111	clear_pte_phys(address, prot);
	112	}
	113
2adb4e10 SM	114	void __init page_table_range_init(unsigned long start, unsigned long end,
	115	pgd_t *pgd_base)
	116	{
	117	pgd_t *pgd;
	118	pud_t *pud;
	119	pmd_t *pmd;
0906a3ad PM	120	pte_t *pte;
0906a3ad PM	121	int i, j, k;
2adb4e10 SM	122	unsigned long vaddr;
2adb4e10 SM	123
0906a3ad PM	124	vaddr = start;
	125	i = __pgd_offset(vaddr);
	126	j = __pud_offset(vaddr);
	127	k = __pmd_offset(vaddr);
	128	pgd = pgd_base + i;
	129
	130	for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
	131	pud = (pud_t *)pgd;
	132	for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
5d9b4b19	133	#ifdef __PAGETABLE_PMD_FOLDED
0906a3ad	134	pmd = (pmd_t *)pud;
5d9b4b19 MF	135	#else
	136	pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
	137	pud_populate(&init_mm, pud, pmd);
	138	pmd += k;
	139	#endif
0906a3ad PM	140	for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
	141	if (pmd_none(*pmd)) {
	142	pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
	143	pmd_populate_kernel(&init_mm, pmd, pte);
	144	BUG_ON(pte != pte_offset_kernel(pmd, 0));
	145	}
	146	vaddr += PMD_SIZE;
	147	}
	148	k = 0;
2adb4e10	149	}
0906a3ad	150	j = 0;
2adb4e10 SM	151	}
2adb4e10 SM	152	}
11cbb70e	153	#endif /* CONFIG_MMU */
1da177e4	154
1da177e4 LT	155	/*
1da177e4 LT	156	* paging_init() sets up the page tables
1da177e4 LT	157	*/
	158	void __init paging_init(void)
	159	{
2de212eb	160	unsigned long max_zone_pfns[MAX_NR_ZONES];
0906a3ad	161	unsigned long vaddr, end;
01066625	162	int nid;
1da177e4	163
01066625 PM	164	/* We don't need to map the kernel through the TLB, as
	165	* it is permanatly mapped using P1. So clear the
	166	* entire pgd. */
	167	memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
1da177e4	168
6e4662ff SM	169	/* Set an initial value for the MMU.TTB so we don't have to
	170	* check for a null value. */
	171	set_TTB(swapper_pg_dir);
	172
acca4f4d PM	173	/*
acca4f4d PM	174	* Populate the relevant portions of swapper_pg_dir so that
2adb4e10	175	* we can use the fixmap entries without calling kmalloc.
acca4f4d PM	176	* pte's will be filled in by __set_fixmap().
	177	*/
	178	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
0906a3ad PM	179	end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
0906a3ad PM	180	page_table_range_init(vaddr, end, swapper_pg_dir);
acca4f4d PM	181
acca4f4d PM	182	kmap_coherent_init();
2adb4e10	183
2de212eb PM	184	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
2de212eb PM	185
01066625 PM	186	for_each_online_node(nid) {
01066625 PM	187	pg_data_t *pgdat = NODE_DATA(nid);
01066625 PM	188	unsigned long low, start_pfn;
01066625 PM	189
3560e249	190	start_pfn = pgdat->bdata->node_min_pfn;
01066625 PM	191	low = pgdat->bdata->node_low_pfn;
01066625 PM	192
2de212eb PM	193	if (max_zone_pfns[ZONE_NORMAL] < low)
2de212eb PM	194	max_zone_pfns[ZONE_NORMAL] = low;
01066625 PM	195
	196	printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
	197	nid, start_pfn, low);
01066625	198	}
2de212eb PM	199
2de212eb PM	200	free_area_init_nodes(max_zone_pfns);
1da177e4 LT	201	}
1da177e4 LT	202
94c28510 PM	203	/*
	204	* Early initialization for any I/O MMUs we might have.
	205	*/
	206	static void __init iommu_init(void)
	207	{
	208	no_iommu_init();
	209	}
	210
d9b9487a PM	211	unsigned int mem_init_done = 0;
d9b9487a PM	212
1da177e4 LT	213	void __init mem_init(void)
1da177e4 LT	214	{
dfbb9042	215	int codesize, datasize, initsize;
01066625	216	int nid;
1da177e4	217
94c28510 PM	218	iommu_init();
94c28510 PM	219
2de212eb PM	220	num_physpages = 0;
	221	high_memory = NULL;
	222
01066625 PM	223	for_each_online_node(nid) {
	224	pg_data_t *pgdat = NODE_DATA(nid);
	225	unsigned long node_pages = 0;
	226	void *node_high_memory;
01066625 PM	227
	228	num_physpages += pgdat->node_present_pages;
	229
	230	if (pgdat->node_spanned_pages)
	231	node_pages = free_all_bootmem_node(pgdat);
	232
	233	totalram_pages += node_pages;
1da177e4	234
2de212eb PM	235	node_high_memory = (void *)__va((pgdat->node_start_pfn +
	236	pgdat->node_spanned_pages) <<
	237	PAGE_SHIFT);
01066625 PM	238	if (node_high_memory > high_memory)
	239	high_memory = node_high_memory;
	240	}
1da177e4	241
37443ef3 PM	242	/* Set this up early, so we can take care of the zero page */
	243	cpu_cache_init();
	244
1da177e4 LT	245	/* clear the zero-page */
	246	memset(empty_zero_page, 0, PAGE_SIZE);
	247	__flush_wback_region(empty_zero_page, PAGE_SIZE);
	248
35f99c0d PM	249	vsyscall_init();
35f99c0d PM	250
1da177e4 LT	251	codesize = (unsigned long) &_etext - (unsigned long) &_text;
	252	datasize = (unsigned long) &_edata - (unsigned long) &_etext;
	253	initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
	254
2cb7ce3b	255	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
dfbb9042	256	"%dk data, %dk init)\n",
cc013a88	257	nr_free_pages() << (PAGE_SHIFT-10),
2de212eb	258	num_physpages << (PAGE_SHIFT-10),
1da177e4	259	codesize >> 10,
1da177e4 LT	260	datasize >> 10,
	261	initsize >> 10);
	262
35f99c0d PM	263	printk(KERN_INFO "virtual kernel memory layout:\n"
	264	" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
	265	#ifdef CONFIG_HIGHMEM
	266	" pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
	267	#endif
	268	" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
3125ee72	269	" lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n"
b0f3ae03	270	#ifdef CONFIG_UNCACHED_MAPPING
3125ee72	271	" : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n"
b0f3ae03	272	#endif
35f99c0d PM	273	" .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
	274	" .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
	275	" .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
	276	FIXADDR_START, FIXADDR_TOP,
	277	(FIXADDR_TOP - FIXADDR_START) >> 10,
	278
	279	#ifdef CONFIG_HIGHMEM
	280	PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
	281	(LAST_PKMAP*PAGE_SIZE) >> 10,
	282	#endif
	283
	284	(unsigned long)VMALLOC_START, VMALLOC_END,
	285	(VMALLOC_END - VMALLOC_START) >> 20,
	286
	287	(unsigned long)memory_start, (unsigned long)high_memory,
	288	((unsigned long)high_memory - (unsigned long)memory_start) >> 20,
	289
b0f3ae03	290	#ifdef CONFIG_UNCACHED_MAPPING
9edef286	291	uncached_start, uncached_end, uncached_size >> 20,
b0f3ae03	292	#endif
3125ee72	293
35f99c0d PM	294	(unsigned long)&__init_begin, (unsigned long)&__init_end,
	295	((unsigned long)&__init_end -
	296	(unsigned long)&__init_begin) >> 10,
	297
	298	(unsigned long)&_etext, (unsigned long)&_edata,
	299	((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
	300
	301	(unsigned long)&_text, (unsigned long)&_etext,
	302	((unsigned long)&_etext - (unsigned long)&_text) >> 10);
d9b9487a PM	303
d9b9487a PM	304	mem_init_done = 1;
1da177e4 LT	305	}
	306
	307	void free_initmem(void)
	308	{
	309	unsigned long addr;
65463b73	310
1da177e4 LT	311	addr = (unsigned long)(&__init_begin);
	312	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
	313	ClearPageReserved(virt_to_page(addr));
7835e98b	314	init_page_count(virt_to_page(addr));
1da177e4 LT	315	free_page(addr);
	316	totalram_pages++;
	317	}
07cbb41b PM	318	printk("Freeing unused kernel memory: %ldk freed\n",
	319	((unsigned long)&__init_end -
	320	(unsigned long)&__init_begin) >> 10);
1da177e4 LT	321	}
	322
	323	#ifdef CONFIG_BLK_DEV_INITRD
	324	void free_initrd_mem(unsigned long start, unsigned long end)
	325	{
	326	unsigned long p;
	327	for (p = start; p < end; p += PAGE_SIZE) {
	328	ClearPageReserved(virt_to_page(p));
7835e98b	329	init_page_count(virt_to_page(p));
1da177e4 LT	330	free_page(p);
	331	totalram_pages++;
	332	}
2de212eb	333	printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
1da177e4 LT	334	}
1da177e4 LT	335	#endif
33d63bd8 PM	336
33d63bd8 PM	337	#ifdef CONFIG_MEMORY_HOTPLUG
33d63bd8 PM	338	int arch_add_memory(int nid, u64 start, u64 size)
	339	{
	340	pg_data_t *pgdat;
	341	unsigned long start_pfn = start >> PAGE_SHIFT;
	342	unsigned long nr_pages = size >> PAGE_SHIFT;
	343	int ret;
	344
	345	pgdat = NODE_DATA(nid);
	346
	347	/* We only have ZONE_NORMAL, so this is easy.. */
c04fc586 GH	348	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
c04fc586 GH	349	start_pfn, nr_pages);
33d63bd8	350	if (unlikely(ret))
866e6b9e	351	printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
33d63bd8 PM	352
	353	return ret;
	354	}
	355	EXPORT_SYMBOL_GPL(arch_add_memory);
	356
357d5946	357	#ifdef CONFIG_NUMA
33d63bd8 PM	358	int memory_add_physaddr_to_nid(u64 addr)
	359	{
	360	/* Node 0 for now.. */
	361	return 0;
	362	}
	363	EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
	364	#endif
1f69b6af	365
3159e7d6	366	#endif /* CONFIG_MEMORY_HOTPLUG */