[linux-2.6-block.git] / arch / mips / powertv / memory.c

/*
 * Carsten Langgaard, carstenl@mips.com
 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
 * Portions copyright (C) 2009 Cisco Systems, Inc.
 *
 *  This program is free software; you can distribute 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 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, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Apparently originally from arch/mips/malta-memory.c. Modified to work
 * with the PowerTV bootloader.
 */
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/string.h>

#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/sections.h>

#include <asm/mach-powertv/asic.h>
#include <asm/mach-powertv/ioremap.h>

#include "init.h"

/* Memory constants */
#define KIBIBYTE(n)		((n) * 1024)	/* Number of kibibytes */
#define MEBIBYTE(n)		((n) * KIBIBYTE(1024)) /* Number of mebibytes */
#define DEFAULT_MEMSIZE		MEBIBYTE(128)	/* If no memsize provided */

#define BLDR_SIZE	KIBIBYTE(256)		/* Memory reserved for bldr */
#define RV_SIZE		MEBIBYTE(4)		/* Size of reset vector */

#define LOW_MEM_END	0x20000000		/* Highest low memory address */
#define BLDR_ALIAS	0x10000000		/* Bootloader address */
#define RV_PHYS		0x1fc00000		/* Reset vector address */
#define LOW_RAM_END	RV_PHYS			/* End of real RAM in low mem */

/*
 * Very low-level conversion from processor physical address to device
 * DMA address for the first bank of memory.
 */
#define PHYS_TO_DMA(paddr)	((paddr) + (CONFIG_LOW_RAM_DMA - LOW_RAM_ALIAS))

unsigned long ptv_memsize;

/*
 * struct low_mem_reserved - Items in low memory that are reserved
 * @start:	Physical address of item
 * @size:	Size, in bytes, of this item
 * @is_aliased: True if this is RAM aliased from another location. If false,
 *		it is something other than aliased RAM and the RAM in the
 *		unaliased address is still visible outside of low memory.
 */
struct low_mem_reserved {
	phys_addr_t	start;
	phys_addr_t	size;
	bool		is_aliased;
};

/*
 * Must be in ascending address order
 */
struct low_mem_reserved low_mem_reserved[] = {
	{BLDR_ALIAS, BLDR_SIZE, true},	/* Bootloader RAM */
	{RV_PHYS, RV_SIZE, false},	/* Reset vector */
};

/*
 * struct mem_layout - layout of a piece of the system RAM
 * @phys:	Physical address of the start of this piece of RAM. This is the
 *		address at which both the processor and I/O devices see the
 *		RAM.
 * @alias:	Alias of this piece of memory in order to make it appear in
 *		the low memory part of the processor's address space. I/O
 *		devices don't see anything here.
 * @size:	Size, in bytes, of this piece of RAM
 */
struct mem_layout {
	phys_addr_t	phys;
	phys_addr_t	alias;
	phys_addr_t	size;
};

/*
 * struct mem_layout_list - list descriptor for layouts of system RAM pieces
 * @family:	Specifies the family being described
 * @n:		Number of &struct mem_layout elements
 * @layout:	Pointer to the list of &mem_layout structures
 */
struct mem_layout_list {
	enum family_type	family;
	size_t			n;
	struct mem_layout	*layout;
};

static struct mem_layout f1500_layout[] = {
	{0x20000000, 0x10000000, MEBIBYTE(256)},
};

static struct mem_layout f4500_layout[] = {
	{0x40000000, 0x10000000, MEBIBYTE(256)},
	{0x20000000, 0x20000000, MEBIBYTE(32)},
};

static struct mem_layout f8500_layout[] = {
	{0x40000000, 0x10000000, MEBIBYTE(256)},
	{0x20000000, 0x20000000, MEBIBYTE(32)},
	{0x30000000, 0x30000000, MEBIBYTE(32)},
};

static struct mem_layout fx600_layout[] = {
	{0x20000000, 0x10000000, MEBIBYTE(256)},
	{0x60000000, 0x60000000, MEBIBYTE(128)},
};

static struct mem_layout_list layout_list[] = {
	{FAMILY_1500, ARRAY_SIZE(f1500_layout), f1500_layout},
	{FAMILY_1500VZE, ARRAY_SIZE(f1500_layout), f1500_layout},
	{FAMILY_1500VZF, ARRAY_SIZE(f1500_layout), f1500_layout},
	{FAMILY_4500, ARRAY_SIZE(f4500_layout), f4500_layout},
	{FAMILY_8500, ARRAY_SIZE(f8500_layout), f8500_layout},
	{FAMILY_8500RNG, ARRAY_SIZE(f8500_layout), f8500_layout},
	{FAMILY_4600, ARRAY_SIZE(fx600_layout), fx600_layout},
	{FAMILY_4600VZA, ARRAY_SIZE(fx600_layout), fx600_layout},
	{FAMILY_8600, ARRAY_SIZE(fx600_layout), fx600_layout},
	{FAMILY_8600VZB, ARRAY_SIZE(fx600_layout), fx600_layout},
};

/* If we can't determine the layout, use this */
static struct mem_layout default_layout[] = {
	{0x20000000, 0x10000000, MEBIBYTE(128)},
};

/**
 * register_non_ram - register low memory not available for RAM usage
 */
static __init void register_non_ram(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(low_mem_reserved); i++)
		add_memory_region(low_mem_reserved[i].start,
			low_mem_reserved[i].size, BOOT_MEM_RESERVED);
}

/**
 * get_memsize - get the size of memory as a single bank
 */
static phys_addr_t get_memsize(void)
{
	static char cmdline[COMMAND_LINE_SIZE] __initdata;
	phys_addr_t memsize = 0;
	char *memsize_str;
	char *ptr;

	/* Check the command line first for a memsize directive */
	strcpy(cmdline, arcs_cmdline);
	ptr = strstr(cmdline, "memsize=");
	if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
		ptr = strstr(ptr, " memsize=");

	if (ptr) {
		memsize = memparse(ptr + 8, &ptr);
	} else {
		/* otherwise look in the environment */
		memsize_str = prom_getenv("memsize");

		if (memsize_str != NULL) {
			pr_info("prom memsize = %s\n", memsize_str);
			memsize = simple_strtol(memsize_str, NULL, 0);
		}

		if (memsize == 0) {
			if (_prom_memsize != 0) {
				memsize = _prom_memsize;
				pr_info("_prom_memsize = 0x%x\n", memsize);
				/* add in memory that the bootloader doesn't
				 * report */
				memsize += BLDR_SIZE;
			} else {
				memsize = DEFAULT_MEMSIZE;
				pr_info("Memsize not passed by bootloader, "
					"defaulting to 0x%x\n", memsize);
			}
		}
	}

	return memsize;
}

/**
 * register_low_ram - register an aliased section of RAM
 * @p:		Alias address of memory
 * @n:		Number of bytes in this section of memory
 *
 * Returns the number of bytes registered
 *
 */
static __init phys_addr_t register_low_ram(phys_addr_t p, phys_addr_t n)
{
	phys_addr_t s;
	int i;
	phys_addr_t orig_n;

	orig_n = n;

	BUG_ON(p + n > RV_PHYS);

	for (i = 0; n != 0 && i < ARRAY_SIZE(low_mem_reserved); i++) {
		phys_addr_t start;
		phys_addr_t size;

		start = low_mem_reserved[i].start;
		size = low_mem_reserved[i].size;

		/* Handle memory before this low memory section */
		if (p < start) {
			phys_addr_t s;
			s = min(n, start - p);
			add_memory_region(p, s, BOOT_MEM_RAM);
			p += s;
			n -= s;
		}

		/* Handle the low memory section itself. If it's aliased,
		 * we reduce the number of byes left, but if not, the RAM
		 * is available elsewhere and we don't reduce the number of
		 * bytes remaining. */
		if (p == start) {
			if (low_mem_reserved[i].is_aliased) {
				s = min(n, size);
				n -= s;
				p += s;
			} else
				p += n;
		}
	}

	return orig_n - n;
}

/*
 * register_ram - register real RAM
 * @p:	Address of memory as seen by devices
 * @alias:	If the memory is seen at an additional address by the processor,
 *		this will be the address, otherwise it is the same as @p.
 * @n:		Number of bytes in this section of memory
 */
static __init void register_ram(phys_addr_t p, phys_addr_t alias,
	phys_addr_t n)
{
	/*
	 * If some or all of this memory has an alias, break it into the
	 * aliased and non-aliased portion.
	 */
	if (p != alias) {
		phys_addr_t alias_size;
		phys_addr_t registered;

		alias_size = min(n, LOW_RAM_END - alias);
		registered = register_low_ram(alias, alias_size);
		ioremap_add_map(alias, p, n);
		n -= registered;
		p += registered;
	}

#ifdef CONFIG_HIGHMEM
	if (n != 0) {
		add_memory_region(p, n, BOOT_MEM_RAM);
		ioremap_add_map(p, p, n);
	}
#endif
}

/**
 * register_address_space - register things in the address space
 * @memsize:	Number of bytes of RAM installed
 *
 * Takes the given number of bytes of RAM and registers as many of the regions,
 * or partial regions, as it can. So, the default configuration might have
 * two regions with 256 MiB each. If the memsize passed in on the command line
 * is 384 MiB, it will register the first region with 256 MiB and the second
 * with 128 MiB.
 */
static __init void register_address_space(phys_addr_t memsize)
{
	int i;
	phys_addr_t size;
	size_t n;
	struct mem_layout *layout;
	enum family_type family;

	/*
	 * Register all of the things that aren't available to the kernel as
	 * memory.
	 */
	register_non_ram();

	/* Find the appropriate memory description */
	family = platform_get_family();

	for (i = 0; i < ARRAY_SIZE(layout_list); i++) {
		if (layout_list[i].family == family)
			break;
	}

	if (i == ARRAY_SIZE(layout_list)) {
		n = ARRAY_SIZE(default_layout);
		layout = default_layout;
	} else {
		n = layout_list[i].n;
		layout = layout_list[i].layout;
	}

	for (i = 0; memsize != 0 && i < n; i++) {
		size = min(memsize, layout[i].size);
		register_ram(layout[i].phys, layout[i].alias, size);
		memsize -= size;
	}
}

void __init prom_meminit(void)
{
	ptv_memsize = get_memsize();
	register_address_space(ptv_memsize);
}

void __init prom_free_prom_memory(void)
{
	unsigned long addr;
	int i;

	for (i = 0; i < boot_mem_map.nr_map; i++) {
		if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
			continue;

		addr = boot_mem_map.map[i].addr;
		free_init_pages("prom memory",
				addr, addr + boot_mem_map.map[i].size);
	}
}
Commit	Line	Data
a3a0f8c8 DV	1	/*
	2	* Carsten Langgaard, carstenl@mips.com
	3	* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
	4	* Portions copyright (C) 2009 Cisco Systems, Inc.
	5	*
	6	* This program is free software; you can distribute it and/or modify it
	7	* under the terms of the GNU General Public License (Version 2) as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	13	* for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
	18	*
	19	* Apparently originally from arch/mips/malta-memory.c. Modified to work
	20	* with the PowerTV bootloader.
	21	*/
	22	#include <linux/init.h>
	23	#include <linux/mm.h>
	24	#include <linux/bootmem.h>
	25	#include <linux/pfn.h>
	26	#include <linux/string.h>
	27
	28	#include <asm/bootinfo.h>
	29	#include <asm/page.h>
	30	#include <asm/sections.h>
	31
ca36c36b DV	32	#include <asm/mach-powertv/asic.h>
ca36c36b DV	33	#include <asm/mach-powertv/ioremap.h>
a3a0f8c8 DV	34
	35	#include "init.h"
	36
	37	/* Memory constants */
	38	#define KIBIBYTE(n) ((n) * 1024) /* Number of kibibytes */
	39	#define MEBIBYTE(n) ((n) * KIBIBYTE(1024)) /* Number of mebibytes */
ca36c36b	40	#define DEFAULT_MEMSIZE MEBIBYTE(128) /* If no memsize provided */
a3a0f8c8	41
ca36c36b DV	42	#define BLDR_SIZE KIBIBYTE(256) /* Memory reserved for bldr */
ca36c36b DV	43	#define RV_SIZE MEBIBYTE(4) /* Size of reset vector */
a3a0f8c8	44
ca36c36b DV	45	#define LOW_MEM_END 0x20000000 /* Highest low memory address */
	46	#define BLDR_ALIAS 0x10000000 /* Bootloader address */
	47	#define RV_PHYS 0x1fc00000 /* Reset vector address */
	48	#define LOW_RAM_END RV_PHYS /* End of real RAM in low mem */
	49
	50	/*
	51	* Very low-level conversion from processor physical address to device
	52	* DMA address for the first bank of memory.
	53	*/
	54	#define PHYS_TO_DMA(paddr) ((paddr) + (CONFIG_LOW_RAM_DMA - LOW_RAM_ALIAS))
	55
	56	unsigned long ptv_memsize;
	57
	58	/*
b595076a	59	* struct low_mem_reserved - Items in low memory that are reserved
ca36c36b DV	60	* @start: Physical address of item
ca36c36b DV	61	* @size: Size, in bytes, of this item
70342287	62	* @is_aliased: True if this is RAM aliased from another location. If false,
ca36c36b DV	63	* it is something other than aliased RAM and the RAM in the
	64	* unaliased address is still visible outside of low memory.
	65	*/
	66	struct low_mem_reserved {
	67	phys_addr_t start;
	68	phys_addr_t size;
	69	bool is_aliased;
	70	};
	71
	72	/*
	73	* Must be in ascending address order
	74	*/
	75	struct low_mem_reserved low_mem_reserved[] = {
	76	{BLDR_ALIAS, BLDR_SIZE, true}, /* Bootloader RAM */
	77	{RV_PHYS, RV_SIZE, false}, /* Reset vector */
	78	};
	79
	80	/*
	81	* struct mem_layout - layout of a piece of the system RAM
	82	* @phys: Physical address of the start of this piece of RAM. This is the
	83	* address at which both the processor and I/O devices see the
	84	* RAM.
	85	* @alias: Alias of this piece of memory in order to make it appear in
	86	* the low memory part of the processor's address space. I/O
	87	* devices don't see anything here.
	88	* @size: Size, in bytes, of this piece of RAM
	89	*/
	90	struct mem_layout {
	91	phys_addr_t phys;
	92	phys_addr_t alias;
	93	phys_addr_t size;
	94	};
	95
	96	/*
	97	* struct mem_layout_list - list descriptor for layouts of system RAM pieces
	98	* @family: Specifies the family being described
	99	* @n: Number of &struct mem_layout elements
	100	* @layout: Pointer to the list of &mem_layout structures
	101	*/
	102	struct mem_layout_list {
	103	enum family_type family;
	104	size_t n;
	105	struct mem_layout *layout;
	106	};
	107
	108	static struct mem_layout f1500_layout[] = {
	109	{0x20000000, 0x10000000, MEBIBYTE(256)},
	110	};
	111
	112	static struct mem_layout f4500_layout[] = {
	113	{0x40000000, 0x10000000, MEBIBYTE(256)},
	114	{0x20000000, 0x20000000, MEBIBYTE(32)},
	115	};
	116
	117	static struct mem_layout f8500_layout[] = {
	118	{0x40000000, 0x10000000, MEBIBYTE(256)},
	119	{0x20000000, 0x20000000, MEBIBYTE(32)},
	120	{0x30000000, 0x30000000, MEBIBYTE(32)},
	121	};
	122
	123	static struct mem_layout fx600_layout[] = {
	124	{0x20000000, 0x10000000, MEBIBYTE(256)},
	125	{0x60000000, 0x60000000, MEBIBYTE(128)},
	126	};
127
128	static struct mem_layout_list layout_list[] = {
129	{FAMILY_1500, ARRAY_SIZE(f1500_layout), f1500_layout},
130	{FAMILY_1500VZE, ARRAY_SIZE(f1500_layout), f1500_layout},
131	{FAMILY_1500VZF, ARRAY_SIZE(f1500_layout), f1500_layout},
132	{FAMILY_4500, ARRAY_SIZE(f4500_layout), f4500_layout},
133	{FAMILY_8500, ARRAY_SIZE(f8500_layout), f8500_layout},
134	{FAMILY_8500RNG, ARRAY_SIZE(f8500_layout), f8500_layout},
135	{FAMILY_4600, ARRAY_SIZE(fx600_layout), fx600_layout},
136	{FAMILY_4600VZA, ARRAY_SIZE(fx600_layout), fx600_layout},
137	{FAMILY_8600, ARRAY_SIZE(fx600_layout), fx600_layout},
138	{FAMILY_8600VZB, ARRAY_SIZE(fx600_layout), fx600_layout},
139	};
140
141	/* If we can't determine the layout, use this */
142	static struct mem_layout default_layout[] = {
143	{0x20000000, 0x10000000, MEBIBYTE(128)},
144	};
145
146	/**
147	* register_non_ram - register low memory not available for RAM usage
148	*/
149	static __init void register_non_ram(void)
150	{
151	int i;
152
153	for (i = 0; i < ARRAY_SIZE(low_mem_reserved); i++)
154	add_memory_region(low_mem_reserved[i].start,
155	low_mem_reserved[i].size, BOOT_MEM_RESERVED);
156	}
157
158	/**
159	* get_memsize - get the size of memory as a single bank
160	*/
161	static phys_addr_t get_memsize(void)
a3a0f8c8	162	{
ca36c36b DV	163	static char cmdline[COMMAND_LINE_SIZE] __initdata;
ca36c36b DV	164	phys_addr_t memsize = 0;
a3a0f8c8	165	char *memsize_str;
a3a0f8c8	166	char *ptr;
a3a0f8c8 DV	167
	168	/* Check the command line first for a memsize directive */
	169	strcpy(cmdline, arcs_cmdline);
	170	ptr = strstr(cmdline, "memsize=");
	171	if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
	172	ptr = strstr(ptr, " memsize=");
	173
	174	if (ptr) {
	175	memsize = memparse(ptr + 8, &ptr);
	176	} else {
	177	/* otherwise look in the environment */
	178	memsize_str = prom_getenv("memsize");
	179
	180	if (memsize_str != NULL) {
	181	pr_info("prom memsize = %s\n", memsize_str);
	182	memsize = simple_strtol(memsize_str, NULL, 0);
	183	}
	184
	185	if (memsize == 0) {
	186	if (_prom_memsize != 0) {
	187	memsize = _prom_memsize;
ca36c36b	188	pr_info("_prom_memsize = 0x%x\n", memsize);
a3a0f8c8 DV	189	/* add in memory that the bootloader doesn't
a3a0f8c8 DV	190	* report */
ca36c36b	191	memsize += BLDR_SIZE;
a3a0f8c8 DV	192	} else {
	193	memsize = DEFAULT_MEMSIZE;
	194	pr_info("Memsize not passed by bootloader, "
ca36c36b	195	"defaulting to 0x%x\n", memsize);
a3a0f8c8 DV	196	}
	197	}
	198	}
	199
ca36c36b DV	200	return memsize;
	201	}
	202
	203	/**
	204	* register_low_ram - register an aliased section of RAM
	205	* @p: Alias address of memory
	206	* @n: Number of bytes in this section of memory
	207	*
	208	* Returns the number of bytes registered
	209	*
	210	*/
	211	static __init phys_addr_t register_low_ram(phys_addr_t p, phys_addr_t n)
	212	{
	213	phys_addr_t s;
	214	int i;
	215	phys_addr_t orig_n;
	216
	217	orig_n = n;
	218
	219	BUG_ON(p + n > RV_PHYS);
	220
	221	for (i = 0; n != 0 && i < ARRAY_SIZE(low_mem_reserved); i++) {
	222	phys_addr_t start;
	223	phys_addr_t size;
	224
	225	start = low_mem_reserved[i].start;
	226	size = low_mem_reserved[i].size;
	227
	228	/* Handle memory before this low memory section */
	229	if (p < start) {
	230	phys_addr_t s;
	231	s = min(n, start - p);
	232	add_memory_region(p, s, BOOT_MEM_RAM);
	233	p += s;
	234	n -= s;
	235	}
	236
	237	/* Handle the low memory section itself. If it's aliased,
	238	* we reduce the number of byes left, but if not, the RAM
	239	* is available elsewhere and we don't reduce the number of
	240	* bytes remaining. */
	241	if (p == start) {
	242	if (low_mem_reserved[i].is_aliased) {
	243	s = min(n, size);
	244	n -= s;
	245	p += s;
	246	} else
	247	p += n;
	248	}
a3a0f8c8 DV	249	}
a3a0f8c8 DV	250
ca36c36b DV	251	return orig_n - n;
	252	}
	253
a3a0f8c8	254	/*
ca36c36b DV	255	* register_ram - register real RAM
	256	* @p: Address of memory as seen by devices
	257	* @alias: If the memory is seen at an additional address by the processor,
	258	* this will be the address, otherwise it is the same as @p.
	259	* @n: Number of bytes in this section of memory
a3a0f8c8	260	*/
ca36c36b DV	261	static __init void register_ram(phys_addr_t p, phys_addr_t alias,
	262	phys_addr_t n)
	263	{
a3a0f8c8	264	/*
ca36c36b DV	265	* If some or all of this memory has an alias, break it into the
ca36c36b DV	266	* aliased and non-aliased portion.
a3a0f8c8	267	*/
ca36c36b DV	268	if (p != alias) {
	269	phys_addr_t alias_size;
	270	phys_addr_t registered;
	271
	272	alias_size = min(n, LOW_RAM_END - alias);
	273	registered = register_low_ram(alias, alias_size);
	274	ioremap_add_map(alias, p, n);
	275	n -= registered;
	276	p += registered;
	277	}
	278
	279	#ifdef CONFIG_HIGHMEM
	280	if (n != 0) {
	281	add_memory_region(p, n, BOOT_MEM_RAM);
	282	ioremap_add_map(p, p, n);
	283	}
	284	#endif
	285	}
	286
	287	/**
	288	* register_address_space - register things in the address space
	289	* @memsize: Number of bytes of RAM installed
	290	*
	291	* Takes the given number of bytes of RAM and registers as many of the regions,
	292	* or partial regions, as it can. So, the default configuration might have
	293	* two regions with 256 MiB each. If the memsize passed in on the command line
	294	* is 384 MiB, it will register the first region with 256 MiB and the second
	295	* with 128 MiB.
	296	*/
	297	static __init void register_address_space(phys_addr_t memsize)
	298	{
	299	int i;
	300	phys_addr_t size;
	301	size_t n;
	302	struct mem_layout *layout;
	303	enum family_type family;
	304
a3a0f8c8	305	/*
ca36c36b DV	306	* Register all of the things that aren't available to the kernel as
ca36c36b DV	307	* memory.
a3a0f8c8	308	*/
ca36c36b DV	309	register_non_ram();
	310
	311	/* Find the appropriate memory description */
	312	family = platform_get_family();
	313
	314	for (i = 0; i < ARRAY_SIZE(layout_list); i++) {
	315	if (layout_list[i].family == family)
	316	break;
	317	}
	318
	319	if (i == ARRAY_SIZE(layout_list)) {
	320	n = ARRAY_SIZE(default_layout);
	321	layout = default_layout;
	322	} else {
	323	n = layout_list[i].n;
	324	layout = layout_list[i].layout;
	325	}
	326
	327	for (i = 0; memsize != 0 && i < n; i++) {
	328	size = min(memsize, layout[i].size);
	329	register_ram(layout[i].phys, layout[i].alias, size);
	330	memsize -= size;
	331	}
	332	}
	333
	334	void __init prom_meminit(void)
	335	{
	336	ptv_memsize = get_memsize();
	337	register_address_space(ptv_memsize);
a3a0f8c8 DV	338	}
	339
	340	void __init prom_free_prom_memory(void)
	341	{
	342	unsigned long addr;
	343	int i;
	344
	345	for (i = 0; i < boot_mem_map.nr_map; i++) {
	346	if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
	347	continue;
	348
	349	addr = boot_mem_map.map[i].addr;
	350	free_init_pages("prom memory",
	351	addr, addr + boot_mem_map.map[i].size);
	352	}
	353	}