Commit d2a38ef9 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] mm: provide helpers for accessing membanks 



Provide helpers for getting physical addresses or pfns from the
meminfo array, and use them.  Move for_each_nodebank() to
asm/setup.h alongside the meminfo structure definition.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 6c5da7ac

arch/arm/include/asm/setup.h

+11 −0
Original line number Diff line number Diff line
@@ -209,6 +209,17 @@ struct meminfo { 
	struct membank bank[NR_BANKS];

};



#define for_each_nodebank(iter,mi,no)			\

	for (iter = 0; iter < mi->nr_banks; iter++)	\

		if (mi->bank[iter].node == no)



#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)

#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)

#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)

#define bank_phys_start(bank)	(bank)->start

#define bank_phys_end(bank)	((bank)->start + (bank)->size)

#define bank_phys_size(bank)	(bank)->size



/*

 * Early command line parameters.

 */

arch/arm/mm/init.c

+28 −31
Original line number Diff line number Diff line
@@ -69,10 +69,6 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2); 
 */

static struct meminfo meminfo = { 0, };



#define for_each_nodebank(iter,mi,no)			\

	for (iter = 0; iter < mi->nr_banks; iter++)	\

		if (mi->bank[iter].node == no)



void show_mem(void)

{

	int free = 0, total = 0, reserved = 0;
@@ -86,11 +82,12 @@ void show_mem(void) 
		struct page *map = n->node_mem_map - n->node_start_pfn;



		for_each_nodebank (i,mi,node) {

			struct membank *bank = &mi->bank[i];

			unsigned int pfn1, pfn2;

			struct page *page, *end;



			pfn1 = __phys_to_pfn(mi->bank[i].start);

			pfn2 = __phys_to_pfn(mi->bank[i].size + mi->bank[i].start);

			pfn1 = bank_pfn_start(bank);

			pfn2 = bank_pfn_end(bank);



			page = map + pfn1;

			end  = map + pfn2;
@@ -129,17 +126,17 @@ void show_mem(void) 
static unsigned int __init

find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)

{

	unsigned int start_pfn, bank, bootmap_pfn;

	unsigned int start_pfn, i, bootmap_pfn;



	start_pfn   = PAGE_ALIGN(__pa(&_end)) >> PAGE_SHIFT;

	bootmap_pfn = 0;



	for_each_nodebank(bank, mi, node) {

	for_each_nodebank(i, mi, node) {

		struct membank *bank = &mi->bank[i];

		unsigned int start, end;



		start = mi->bank[bank].start >> PAGE_SHIFT;

		end   = (mi->bank[bank].size +

			 mi->bank[bank].start) >> PAGE_SHIFT;

		start = bank_pfn_start(bank);

		end   = bank_pfn_end(bank);



		if (end < start_pfn)

			continue;
@@ -178,13 +175,10 @@ static int __init check_initrd(struct meminfo *mi) 
		initrd_node = -1;



		for (i = 0; i < mi->nr_banks; i++) {

			unsigned long bank_end;



			bank_end = mi->bank[i].start + mi->bank[i].size;



			if (mi->bank[i].start <= phys_initrd_start &&

			    end <= bank_end)

				initrd_node = mi->bank[i].node;

			struct membank *bank = &mi->bank[i];

			if (bank_phys_start(bank) <= phys_initrd_start &&

			    end <= bank_phys_end(bank))

				initrd_node = bank->node;

		}

	}
@@ -204,9 +198,9 @@ static inline void map_memory_bank(struct membank *bank) 
#ifdef CONFIG_MMU

	struct map_desc map;



	map.pfn = __phys_to_pfn(bank->start);

	map.virtual = __phys_to_virt(bank->start);

	map.length = bank->size;

	map.pfn = bank_pfn_start(bank);

	map.virtual = __phys_to_virt(bank_phys_start(bank));

	map.length = bank_phys_size(bank);

	map.type = MT_MEMORY;



	create_mapping(&map);
@@ -232,8 +226,8 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi) 
		struct membank *bank = &mi->bank[i];

		unsigned long start, end;



		start = bank->start >> PAGE_SHIFT;

		end = (bank->start + bank->size) >> PAGE_SHIFT;

		start = bank_pfn_start(bank);

		end = bank_pfn_end(bank);



		if (start_pfn > start)

			start_pfn = start;
@@ -263,8 +257,10 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi) 
	pgdat = NODE_DATA(node);

	init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn);



	for_each_nodebank(i, mi, node)

		free_bootmem_node(pgdat, mi->bank[i].start, mi->bank[i].size);

	for_each_nodebank(i, mi, node) {

		struct membank *bank = &mi->bank[i];

		free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));

	}



	/*

	 * Reserve the bootmem bitmap for this node.
@@ -317,7 +313,7 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi) 
	 */

	zhole_size[0] = zone_size[0];

	for_each_nodebank(i, mi, node)

		zhole_size[0] -= mi->bank[i].size >> PAGE_SHIFT;

		zhole_size[0] -= bank_pfn_size(&mi->bank[i]);



	/*

	 * Adjust the sizes according to any special requirements for
@@ -427,7 +423,9 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi) 
	 * information on the command line.

	 */

	for_each_nodebank(i, mi, node) {

		bank_start = mi->bank[i].start >> PAGE_SHIFT;

		struct membank *bank = &mi->bank[i];



		bank_start = bank_pfn_start(bank);

		if (bank_start < prev_bank_end) {

			printk(KERN_ERR "MEM: unordered memory banks.  "

				"Not freeing memmap.\n");
@@ -441,8 +439,7 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi) 
		if (prev_bank_end && prev_bank_end != bank_start)

			free_memmap(node, prev_bank_end, bank_start);



		prev_bank_end = (mi->bank[i].start +

				 mi->bank[i].size) >> PAGE_SHIFT;

		prev_bank_end = bank_pfn_end(bank);

	}

}
@@ -487,8 +484,8 @@ void __init mem_init(void) 


	num_physpages = 0;

	for (i = 0; i < meminfo.nr_banks; i++) {

		num_physpages += meminfo.bank[i].size >> PAGE_SHIFT;

		printk(" %ldMB", meminfo.bank[i].size >> 20);

		num_physpages += bank_pfn_size(&meminfo.bank[i]);

		printk(" %ldMB", bank_phys_size(&meminfo.bank[i]) >> 20);

	}



	printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));

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