[linux-block.git] / arch / sparc / mm / init_32.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/arch/sparc/mm/init.c
 *
 *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 *  Copyright (C) 1995 Eddie C. Dost (ecd@skynet.be)
 *  Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 *  Copyright (C) 2000 Anton Blanchard (anton@samba.org)
 */

#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/initrd.h>
#include <linux/init.h>
#include <linux/highmem.h>
#include <linux/memblock.h>
#include <linux/pagemap.h>
#include <linux/poison.h>
#include <linux/gfp.h>

#include <asm/sections.h>
#include <asm/page.h>
#include <asm/vaddrs.h>
#include <asm/setup.h>
#include <asm/tlb.h>
#include <asm/prom.h>
#include <asm/leon.h>

#include "mm_32.h"

static unsigned long *sparc_valid_addr_bitmap;

unsigned long phys_base;
EXPORT_SYMBOL(phys_base);

unsigned long pfn_base;
EXPORT_SYMBOL(pfn_base);

struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];

/* Initial ramdisk setup */
extern unsigned int sparc_ramdisk_image;
extern unsigned int sparc_ramdisk_size;

unsigned long highstart_pfn, highend_pfn;

unsigned long last_valid_pfn;

unsigned long calc_highpages(void)
{
	int i;
	int nr = 0;

	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
		unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
		unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;

		if (end_pfn <= max_low_pfn)
			continue;

		if (start_pfn < max_low_pfn)
			start_pfn = max_low_pfn;

		nr += end_pfn - start_pfn;
	}

	return nr;
}

static unsigned long calc_max_low_pfn(void)
{
	int i;
	unsigned long tmp = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
	unsigned long curr_pfn, last_pfn;

	last_pfn = (sp_banks[0].base_addr + sp_banks[0].num_bytes) >> PAGE_SHIFT;
	for (i = 1; sp_banks[i].num_bytes != 0; i++) {
		curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;

		if (curr_pfn >= tmp) {
			if (last_pfn < tmp)
				tmp = last_pfn;
			break;
		}

		last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
	}

	return tmp;
}

static void __init find_ramdisk(unsigned long end_of_phys_memory)
{
#ifdef CONFIG_BLK_DEV_INITRD
	unsigned long size;

	/* Now have to check initial ramdisk, so that it won't pass
	 * the end of memory
	 */
	if (sparc_ramdisk_image) {
		if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
			sparc_ramdisk_image -= KERNBASE;
		initrd_start = sparc_ramdisk_image + phys_base;
		initrd_end = initrd_start + sparc_ramdisk_size;
		if (initrd_end > end_of_phys_memory) {
			printk(KERN_CRIT "initrd extends beyond end of memory "
			       "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
			       initrd_end, end_of_phys_memory);
			initrd_start = 0;
		} else {
			/* Reserve the initrd image area. */
			size = initrd_end - initrd_start;
			memblock_reserve(initrd_start, size);

			initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
			initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
		}
	}
#endif
}

unsigned long __init bootmem_init(unsigned long *pages_avail)
{
	unsigned long start_pfn, bytes_avail, size;
	unsigned long end_of_phys_memory = 0;
	unsigned long high_pages = 0;
	int i;

	memblock_set_bottom_up(true);
	memblock_allow_resize();

	bytes_avail = 0UL;
	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
		end_of_phys_memory = sp_banks[i].base_addr +
			sp_banks[i].num_bytes;
		bytes_avail += sp_banks[i].num_bytes;
		if (cmdline_memory_size) {
			if (bytes_avail > cmdline_memory_size) {
				unsigned long slack = bytes_avail - cmdline_memory_size;

				bytes_avail -= slack;
				end_of_phys_memory -= slack;

				sp_banks[i].num_bytes -= slack;
				if (sp_banks[i].num_bytes == 0) {
					sp_banks[i].base_addr = 0xdeadbeef;
				} else {
					memblock_add(sp_banks[i].base_addr,
						     sp_banks[i].num_bytes);
					sp_banks[i+1].num_bytes = 0;
					sp_banks[i+1].base_addr = 0xdeadbeef;
				}
				break;
			}
		}
		memblock_add(sp_banks[i].base_addr, sp_banks[i].num_bytes);
	}

	/* Start with page aligned address of last symbol in kernel
	 * image.
	 */
	start_pfn  = (unsigned long)__pa(PAGE_ALIGN((unsigned long) &_end));

	/* Now shift down to get the real physical page frame number. */
	start_pfn >>= PAGE_SHIFT;

	max_pfn = end_of_phys_memory >> PAGE_SHIFT;

	max_low_pfn = max_pfn;
	highstart_pfn = highend_pfn = max_pfn;

	if (max_low_pfn > pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT)) {
		highstart_pfn = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
		max_low_pfn = calc_max_low_pfn();
		high_pages = calc_highpages();
		printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
		    high_pages >> (20 - PAGE_SHIFT));
	}

	find_ramdisk(end_of_phys_memory);

	/* Reserve the kernel text/data/bss. */
	size = (start_pfn << PAGE_SHIFT) - phys_base;
	memblock_reserve(phys_base, size);
	memblock_add(phys_base, size);

	size = memblock_phys_mem_size() - memblock_reserved_size();
	*pages_avail = (size >> PAGE_SHIFT) - high_pages;

	/* Only allow low memory to be allocated via memblock allocation */
	memblock_set_current_limit(max_low_pfn << PAGE_SHIFT);

	return max_pfn;
}

/*
 * paging_init() sets up the page tables: We call the MMU specific
 * init routine based upon the Sun model type on the Sparc.
 *
 */
void __init paging_init(void)
{
	srmmu_paging_init();
	prom_build_devicetree();
	of_fill_in_cpu_data();
	device_scan();
}

static void __init taint_real_pages(void)
{
	int i;

	for (i = 0; sp_banks[i].num_bytes; i++) {
		unsigned long start, end;

		start = sp_banks[i].base_addr;
		end = start + sp_banks[i].num_bytes;

		while (start < end) {
			set_bit(start >> 20, sparc_valid_addr_bitmap);
			start += PAGE_SIZE;
		}
	}
}

static void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
{
	unsigned long tmp;

#ifdef CONFIG_DEBUG_HIGHMEM
	printk("mapping high region %08lx - %08lx\n", start_pfn, end_pfn);
#endif

	for (tmp = start_pfn; tmp < end_pfn; tmp++)
		free_highmem_page(pfn_to_page(tmp));
}

void __init mem_init(void)
{
	int i;

	if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
		prom_printf("BUG: fixmap and pkmap areas overlap\n");
		prom_printf("pkbase: 0x%lx pkend: 0x%lx fixstart 0x%lx\n",
		       PKMAP_BASE,
		       (unsigned long)PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
		       FIXADDR_START);
		prom_printf("Please mail sparclinux@vger.kernel.org.\n");
		prom_halt();
	}


	/* Saves us work later. */
	memset((void *)empty_zero_page, 0, PAGE_SIZE);

	i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
	i += 1;
	sparc_valid_addr_bitmap = (unsigned long *)
		memblock_alloc(i << 2, SMP_CACHE_BYTES);

	if (sparc_valid_addr_bitmap == NULL) {
		prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
		prom_halt();
	}
	memset(sparc_valid_addr_bitmap, 0, i << 2);

	taint_real_pages();

	max_mapnr = last_valid_pfn - pfn_base;
	high_memory = __va(max_low_pfn << PAGE_SHIFT);
	memblock_free_all();

	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
		unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
		unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;

		if (end_pfn <= highstart_pfn)
			continue;

		if (start_pfn < highstart_pfn)
			start_pfn = highstart_pfn;

		map_high_region(start_pfn, end_pfn);
	}
}

void sparc_flush_page_to_ram(struct page *page)
{
	unsigned long vaddr = (unsigned long)page_address(page);

	if (vaddr)
		__flush_page_to_ram(vaddr);
}
EXPORT_SYMBOL(sparc_flush_page_to_ram);

static const pgprot_t protection_map[16] = {
	[VM_NONE]					= PAGE_NONE,
	[VM_READ]					= PAGE_READONLY,
	[VM_WRITE]					= PAGE_COPY,
	[VM_WRITE | VM_READ]				= PAGE_COPY,
	[VM_EXEC]					= PAGE_READONLY,
	[VM_EXEC | VM_READ]				= PAGE_READONLY,
	[VM_EXEC | VM_WRITE]				= PAGE_COPY,
	[VM_EXEC | VM_WRITE | VM_READ]			= PAGE_COPY,
	[VM_SHARED]					= PAGE_NONE,
	[VM_SHARED | VM_READ]				= PAGE_READONLY,
	[VM_SHARED | VM_WRITE]				= PAGE_SHARED,
	[VM_SHARED | VM_WRITE | VM_READ]		= PAGE_SHARED,
	[VM_SHARED | VM_EXEC]				= PAGE_READONLY,
	[VM_SHARED | VM_EXEC | VM_READ]			= PAGE_READONLY,
	[VM_SHARED | VM_EXEC | VM_WRITE]		= PAGE_SHARED,
	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= PAGE_SHARED
};
DECLARE_VM_GET_PAGE_PROT
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
88278ca2	2	/*
1da177e4 LT	3	* linux/arch/sparc/mm/init.c
	4	*
	5	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	6	* Copyright (C) 1995 Eddie C. Dost (ecd@skynet.be)
	7	* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	8	* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
	9	*/
	10
1da177e4 LT	11	#include <linux/module.h>
	12	#include <linux/signal.h>
	13	#include <linux/sched.h>
	14	#include <linux/kernel.h>
	15	#include <linux/errno.h>
	16	#include <linux/string.h>
	17	#include <linux/types.h>
	18	#include <linux/ptrace.h>
	19	#include <linux/mman.h>
	20	#include <linux/mm.h>
	21	#include <linux/swap.h>
	22	#include <linux/initrd.h>
	23	#include <linux/init.h>
	24	#include <linux/highmem.h>
cca079ef	25	#include <linux/memblock.h>
f538f3df	26	#include <linux/pagemap.h>
1aa0365f	27	#include <linux/poison.h>
5a0e3ad6	28	#include <linux/gfp.h>
1da177e4	29
86ed40bd	30	#include <asm/sections.h>
1da177e4	31	#include <asm/page.h>
1da177e4	32	#include <asm/vaddrs.h>
d191723f	33	#include <asm/setup.h>
1da177e4	34	#include <asm/tlb.h>
942a6bdd	35	#include <asm/prom.h>
0fd7ef1f	36	#include <asm/leon.h>
1da177e4	37
e8c29c83 SR	38	#include "mm_32.h"
e8c29c83 SR	39
e025ab84	40	static unsigned long *sparc_valid_addr_bitmap;
1da177e4 LT	41
1da177e4 LT	42	unsigned long phys_base;
6943f3da SR	43	EXPORT_SYMBOL(phys_base);
6943f3da SR	44
1da177e4	45	unsigned long pfn_base;
6943f3da	46	EXPORT_SYMBOL(pfn_base);
1da177e4	47
1da177e4	48	struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
1da177e4	49
1da177e4 LT	50	/* Initial ramdisk setup */
	51	extern unsigned int sparc_ramdisk_image;
	52	extern unsigned int sparc_ramdisk_size;
	53
	54	unsigned long highstart_pfn, highend_pfn;
	55
1da177e4 LT	56	unsigned long last_valid_pfn;
	57
	58	unsigned long calc_highpages(void)
	59	{
	60	int i;
	61	int nr = 0;
	62
	63	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	64	unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
	65	unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
	66
	67	if (end_pfn <= max_low_pfn)
	68	continue;
	69
	70	if (start_pfn < max_low_pfn)
	71	start_pfn = max_low_pfn;
	72
	73	nr += end_pfn - start_pfn;
	74	}
	75
	76	return nr;
	77	}
	78
50215d65	79	static unsigned long calc_max_low_pfn(void)
1da177e4 LT	80	{
	81	int i;
	82	unsigned long tmp = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
	83	unsigned long curr_pfn, last_pfn;
	84
	85	last_pfn = (sp_banks[0].base_addr + sp_banks[0].num_bytes) >> PAGE_SHIFT;
	86	for (i = 1; sp_banks[i].num_bytes != 0; i++) {
	87	curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
	88
	89	if (curr_pfn >= tmp) {
	90	if (last_pfn < tmp)
	91	tmp = last_pfn;
	92	break;
	93	}
	94
	95	last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
	96	}
	97
	98	return tmp;
	99	}
	100
8818d89c MR	101	static void __init find_ramdisk(unsigned long end_of_phys_memory)
	102	{
	103	#ifdef CONFIG_BLK_DEV_INITRD
	104	unsigned long size;
	105
	106	/* Now have to check initial ramdisk, so that it won't pass
	107	* the end of memory
	108	*/
	109	if (sparc_ramdisk_image) {
	110	if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
	111	sparc_ramdisk_image -= KERNBASE;
	112	initrd_start = sparc_ramdisk_image + phys_base;
	113	initrd_end = initrd_start + sparc_ramdisk_size;
	114	if (initrd_end > end_of_phys_memory) {
	115	printk(KERN_CRIT "initrd extends beyond end of memory "
	116	"(0x%016lx > 0x%016lx)\ndisabling initrd\n",
	117	initrd_end, end_of_phys_memory);
	118	initrd_start = 0;
	119	} else {
	120	/* Reserve the initrd image area. */
	121	size = initrd_end - initrd_start;
	122	memblock_reserve(initrd_start, size);
	123
	124	initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
	125	initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
	126	}
	127	}
	128	#endif
	129	}
	130
1da177e4 LT	131	unsigned long __init bootmem_init(unsigned long *pages_avail)
1da177e4 LT	132	{
cca079ef MR	133	unsigned long start_pfn, bytes_avail, size;
	134	unsigned long end_of_phys_memory = 0;
	135	unsigned long high_pages = 0;
1da177e4 LT	136	int i;
1da177e4 LT	137
cca079ef MR	138	memblock_set_bottom_up(true);
	139	memblock_allow_resize();
	140
1da177e4 LT	141	bytes_avail = 0UL;
	142	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	143	end_of_phys_memory = sp_banks[i].base_addr +
	144	sp_banks[i].num_bytes;
	145	bytes_avail += sp_banks[i].num_bytes;
	146	if (cmdline_memory_size) {
	147	if (bytes_avail > cmdline_memory_size) {
	148	unsigned long slack = bytes_avail - cmdline_memory_size;
	149
	150	bytes_avail -= slack;
	151	end_of_phys_memory -= slack;
	152
	153	sp_banks[i].num_bytes -= slack;
	154	if (sp_banks[i].num_bytes == 0) {
	155	sp_banks[i].base_addr = 0xdeadbeef;
	156	} else {
cca079ef MR	157	memblock_add(sp_banks[i].base_addr,
cca079ef MR	158	sp_banks[i].num_bytes);
1da177e4 LT	159	sp_banks[i+1].num_bytes = 0;
	160	sp_banks[i+1].base_addr = 0xdeadbeef;
	161	}
	162	break;
	163	}
	164	}
cca079ef	165	memblock_add(sp_banks[i].base_addr, sp_banks[i].num_bytes);
1da177e4 LT	166	}
	167
	168	/* Start with page aligned address of last symbol in kernel
60ef8616	169	* image.
1da177e4 LT	170	*/
	171	start_pfn = (unsigned long)__pa(PAGE_ALIGN((unsigned long) &_end));
	172
	173	/* Now shift down to get the real physical page frame number. */
	174	start_pfn >>= PAGE_SHIFT;
	175
1da177e4 LT	176	max_pfn = end_of_phys_memory >> PAGE_SHIFT;
	177
	178	max_low_pfn = max_pfn;
	179	highstart_pfn = highend_pfn = max_pfn;
	180
	181	if (max_low_pfn > pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT)) {
	182	highstart_pfn = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
	183	max_low_pfn = calc_max_low_pfn();
cca079ef	184	high_pages = calc_highpages();
1da177e4	185	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
cca079ef	186	high_pages >> (20 - PAGE_SHIFT));
1da177e4 LT	187	}
1da177e4 LT	188
8818d89c	189	find_ramdisk(end_of_phys_memory);
1da177e4	190
1da177e4 LT	191	/* Reserve the kernel text/data/bss. */
1da177e4 LT	192	size = (start_pfn << PAGE_SHIFT) - phys_base;
cca079ef	193	memblock_reserve(phys_base, size);
4360dfa9	194	memblock_add(phys_base, size);
1da177e4	195
cca079ef MR	196	size = memblock_phys_mem_size() - memblock_reserved_size();
cca079ef MR	197	*pages_avail = (size >> PAGE_SHIFT) - high_pages;
1da177e4	198
bda16693 AL	199	/* Only allow low memory to be allocated via memblock allocation */
	200	memblock_set_current_limit(max_low_pfn << PAGE_SHIFT);
	201
1da177e4 LT	202	return max_pfn;
	203	}
	204
1da177e4 LT	205	/*
	206	* paging_init() sets up the page tables: We call the MMU specific
	207	* init routine based upon the Sun model type on the Sparc.
	208	*
	209	*/
1da177e4 LT	210	void __init paging_init(void)
1da177e4 LT	211	{
cc52aea9	212	srmmu_paging_init();
942a6bdd	213	prom_build_devicetree();
890db403	214	of_fill_in_cpu_data();
1da177e4 LT	215	device_scan();
	216	}
	217
1da177e4 LT	218	static void __init taint_real_pages(void)
	219	{
	220	int i;
	221
	222	for (i = 0; sp_banks[i].num_bytes; i++) {
	223	unsigned long start, end;
	224
	225	start = sp_banks[i].base_addr;
	226	end = start + sp_banks[i].num_bytes;
	227
	228	while (start < end) {
	229	set_bit(start >> 20, sparc_valid_addr_bitmap);
	230	start += PAGE_SIZE;
	231	}
	232	}
	233	}
	234
50215d65	235	static void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
1da177e4 LT	236	{
	237	unsigned long tmp;
	238
	239	#ifdef CONFIG_DEBUG_HIGHMEM
	240	printk("mapping high region %08lx - %08lx\n", start_pfn, end_pfn);
	241	#endif
	242
32e1a109 JL	243	for (tmp = start_pfn; tmp < end_pfn; tmp++)
32e1a109 JL	244	free_highmem_page(pfn_to_page(tmp));
1da177e4 LT	245	}
	246
	247	void __init mem_init(void)
	248	{
1da177e4 LT	249	int i;
	250
	251	if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
	252	prom_printf("BUG: fixmap and pkmap areas overlap\n");
	253	prom_printf("pkbase: 0x%lx pkend: 0x%lx fixstart 0x%lx\n",
	254	PKMAP_BASE,
	255	(unsigned long)PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
	256	FIXADDR_START);
	257	prom_printf("Please mail sparclinux@vger.kernel.org.\n");
	258	prom_halt();
	259	}
	260
	261
	262	/* Saves us work later. */
deba804c	263	memset((void *)empty_zero_page, 0, PAGE_SIZE);
1da177e4 LT	264
	265	i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
	266	i += 1;
	267	sparc_valid_addr_bitmap = (unsigned long *)
9415673e	268	memblock_alloc(i << 2, SMP_CACHE_BYTES);
1da177e4 LT	269
	270	if (sparc_valid_addr_bitmap == NULL) {
	271	prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
	272	prom_halt();
	273	}
	274	memset(sparc_valid_addr_bitmap, 0, i << 2);
	275
	276	taint_real_pages();
	277
	278	max_mapnr = last_valid_pfn - pfn_base;
	279	high_memory = __va(max_low_pfn << PAGE_SHIFT);
c6ffc5ca	280	memblock_free_all();
1da177e4 LT	281
	282	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
	283	unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
	284	unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
	285
1da177e4 LT	286	if (end_pfn <= highstart_pfn)
	287	continue;
	288
	289	if (start_pfn < highstart_pfn)
	290	start_pfn = highstart_pfn;
	291
	292	map_high_region(start_pfn, end_pfn);
	293	}
1da177e4 LT	294	}
1da177e4 LT	295
1da177e4 LT	296	void sparc_flush_page_to_ram(struct page *page)
	297	{
	298	unsigned long vaddr = (unsigned long)page_address(page);
	299
	300	if (vaddr)
	301	__flush_page_to_ram(vaddr);
	302	}
6943f3da	303	EXPORT_SYMBOL(sparc_flush_page_to_ram);
25740d31 AK	304
	305	static const pgprot_t protection_map[16] = {
	306	[VM_NONE] = PAGE_NONE,
	307	[VM_READ] = PAGE_READONLY,
	308	[VM_WRITE] = PAGE_COPY,
	309	[VM_WRITE \| VM_READ] = PAGE_COPY,
	310	[VM_EXEC] = PAGE_READONLY,
	311	[VM_EXEC \| VM_READ] = PAGE_READONLY,
	312	[VM_EXEC \| VM_WRITE] = PAGE_COPY,
	313	[VM_EXEC \| VM_WRITE \| VM_READ] = PAGE_COPY,
	314	[VM_SHARED] = PAGE_NONE,
	315	[VM_SHARED \| VM_READ] = PAGE_READONLY,
	316	[VM_SHARED \| VM_WRITE] = PAGE_SHARED,
	317	[VM_SHARED \| VM_WRITE \| VM_READ] = PAGE_SHARED,
	318	[VM_SHARED \| VM_EXEC] = PAGE_READONLY,
	319	[VM_SHARED \| VM_EXEC \| VM_READ] = PAGE_READONLY,
	320	[VM_SHARED \| VM_EXEC \| VM_WRITE] = PAGE_SHARED,
	321	[VM_SHARED \| VM_EXEC \| VM_WRITE \| VM_READ] = PAGE_SHARED
	322	};
	323	DECLARE_VM_GET_PAGE_PROT