linux/arch/unicore32/mm/init.c
David Rientjes b2b755b5f1 lib, arch: add filter argument to show_mem and fix private implementations
Commit ddd588b5dd ("oom: suppress nodes that are not allowed from
meminfo on oom kill") moved lib/show_mem.o out of lib/lib.a, which
resulted in build warnings on all architectures that implement their own
versions of show_mem():

	lib/lib.a(show_mem.o): In function `show_mem':
	show_mem.c:(.text+0x1f4): multiple definition of `show_mem'
	arch/sparc/mm/built-in.o:(.text+0xd70): first defined here

The fix is to remove __show_mem() and add its argument to show_mem() in
all implementations to prevent this breakage.

Architectures that implement their own show_mem() actually don't do
anything with the argument yet, but they could be made to filter nodes
that aren't allowed in the current context in the future just like the
generic implementation.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: James Bottomley <James.Bottomley@hansenpartnership.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-24 17:49:37 -07:00

518 lines
13 KiB
C

/*
* linux/arch/unicore32/mm/init.c
*
* Copyright (C) 2010 GUAN Xue-tao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/swap.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/initrd.h>
#include <linux/highmem.h>
#include <linux/gfp.h>
#include <linux/memblock.h>
#include <linux/sort.h>
#include <linux/dma-mapping.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/sizes.h>
#include <asm/tlb.h>
#include <mach/map.h>
#include "mm.h"
static unsigned long phys_initrd_start __initdata = 0x01000000;
static unsigned long phys_initrd_size __initdata = SZ_8M;
static int __init early_initrd(char *p)
{
unsigned long start, size;
char *endp;
start = memparse(p, &endp);
if (*endp == ',') {
size = memparse(endp + 1, NULL);
phys_initrd_start = start;
phys_initrd_size = size;
}
return 0;
}
early_param("initrd", early_initrd);
/*
* This keeps memory configuration data used by a couple memory
* initialization functions, as well as show_mem() for the skipping
* of holes in the memory map. It is populated by uc32_add_memory().
*/
struct meminfo meminfo;
void show_mem(unsigned int filter)
{
int free = 0, total = 0, reserved = 0;
int shared = 0, cached = 0, slab = 0, i;
struct meminfo *mi = &meminfo;
printk(KERN_DEFAULT "Mem-info:\n");
show_free_areas();
for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
unsigned int pfn1, pfn2;
struct page *page, *end;
pfn1 = bank_pfn_start(bank);
pfn2 = bank_pfn_end(bank);
page = pfn_to_page(pfn1);
end = pfn_to_page(pfn2 - 1) + 1;
do {
total++;
if (PageReserved(page))
reserved++;
else if (PageSwapCache(page))
cached++;
else if (PageSlab(page))
slab++;
else if (!page_count(page))
free++;
else
shared += page_count(page) - 1;
page++;
} while (page < end);
}
printk(KERN_DEFAULT "%d pages of RAM\n", total);
printk(KERN_DEFAULT "%d free pages\n", free);
printk(KERN_DEFAULT "%d reserved pages\n", reserved);
printk(KERN_DEFAULT "%d slab pages\n", slab);
printk(KERN_DEFAULT "%d pages shared\n", shared);
printk(KERN_DEFAULT "%d pages swap cached\n", cached);
}
static void __init find_limits(unsigned long *min, unsigned long *max_low,
unsigned long *max_high)
{
struct meminfo *mi = &meminfo;
int i;
*min = -1UL;
*max_low = *max_high = 0;
for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
unsigned long start, end;
start = bank_pfn_start(bank);
end = bank_pfn_end(bank);
if (*min > start)
*min = start;
if (*max_high < end)
*max_high = end;
if (bank->highmem)
continue;
if (*max_low < end)
*max_low = end;
}
}
static void __init uc32_bootmem_init(unsigned long start_pfn,
unsigned long end_pfn)
{
struct memblock_region *reg;
unsigned int boot_pages;
phys_addr_t bitmap;
pg_data_t *pgdat;
/*
* Allocate the bootmem bitmap page. This must be in a region
* of memory which has already been mapped.
*/
boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
__pfn_to_phys(end_pfn));
/*
* Initialise the bootmem allocator, handing the
* memory banks over to bootmem.
*/
node_set_online(0);
pgdat = NODE_DATA(0);
init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
/* Free the lowmem regions from memblock into bootmem. */
for_each_memblock(memory, reg) {
unsigned long start = memblock_region_memory_base_pfn(reg);
unsigned long end = memblock_region_memory_end_pfn(reg);
if (end >= end_pfn)
end = end_pfn;
if (start >= end)
break;
free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT);
}
/* Reserve the lowmem memblock reserved regions in bootmem. */
for_each_memblock(reserved, reg) {
unsigned long start = memblock_region_reserved_base_pfn(reg);
unsigned long end = memblock_region_reserved_end_pfn(reg);
if (end >= end_pfn)
end = end_pfn;
if (start >= end)
break;
reserve_bootmem(__pfn_to_phys(start),
(end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
}
}
static void __init uc32_bootmem_free(unsigned long min, unsigned long max_low,
unsigned long max_high)
{
unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
struct memblock_region *reg;
/*
* initialise the zones.
*/
memset(zone_size, 0, sizeof(zone_size));
/*
* The memory size has already been determined. If we need
* to do anything fancy with the allocation of this memory
* to the zones, now is the time to do it.
*/
zone_size[0] = max_low - min;
/*
* Calculate the size of the holes.
* holes = node_size - sum(bank_sizes)
*/
memcpy(zhole_size, zone_size, sizeof(zhole_size));
for_each_memblock(memory, reg) {
unsigned long start = memblock_region_memory_base_pfn(reg);
unsigned long end = memblock_region_memory_end_pfn(reg);
if (start < max_low) {
unsigned long low_end = min(end, max_low);
zhole_size[0] -= low_end - start;
}
}
/*
* Adjust the sizes according to any special requirements for
* this machine type.
*/
arch_adjust_zones(zone_size, zhole_size);
free_area_init_node(0, zone_size, min, zhole_size);
}
int pfn_valid(unsigned long pfn)
{
return memblock_is_memory(pfn << PAGE_SHIFT);
}
EXPORT_SYMBOL(pfn_valid);
static void uc32_memory_present(void)
{
}
static int __init meminfo_cmp(const void *_a, const void *_b)
{
const struct membank *a = _a, *b = _b;
long cmp = bank_pfn_start(a) - bank_pfn_start(b);
return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
}
void __init uc32_memblock_init(struct meminfo *mi)
{
int i;
sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]),
meminfo_cmp, NULL);
memblock_init();
for (i = 0; i < mi->nr_banks; i++)
memblock_add(mi->bank[i].start, mi->bank[i].size);
/* Register the kernel text, kernel data and initrd with memblock. */
memblock_reserve(__pa(_text), _end - _text);
#ifdef CONFIG_BLK_DEV_INITRD
if (phys_initrd_size) {
memblock_reserve(phys_initrd_start, phys_initrd_size);
/* Now convert initrd to virtual addresses */
initrd_start = __phys_to_virt(phys_initrd_start);
initrd_end = initrd_start + phys_initrd_size;
}
#endif
uc32_mm_memblock_reserve();
memblock_analyze();
memblock_dump_all();
}
void __init bootmem_init(void)
{
unsigned long min, max_low, max_high;
max_low = max_high = 0;
find_limits(&min, &max_low, &max_high);
uc32_bootmem_init(min, max_low);
#ifdef CONFIG_SWIOTLB
swiotlb_init(1);
#endif
/*
* Sparsemem tries to allocate bootmem in memory_present(),
* so must be done after the fixed reservations
*/
uc32_memory_present();
/*
* sparse_init() needs the bootmem allocator up and running.
*/
sparse_init();
/*
* Now free the memory - free_area_init_node needs
* the sparse mem_map arrays initialized by sparse_init()
* for memmap_init_zone(), otherwise all PFNs are invalid.
*/
uc32_bootmem_free(min, max_low, max_high);
high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
/*
* This doesn't seem to be used by the Linux memory manager any
* more, but is used by ll_rw_block. If we can get rid of it, we
* also get rid of some of the stuff above as well.
*
* Note: max_low_pfn and max_pfn reflect the number of _pages_ in
* the system, not the maximum PFN.
*/
max_low_pfn = max_low - PHYS_PFN_OFFSET;
max_pfn = max_high - PHYS_PFN_OFFSET;
}
static inline int free_area(unsigned long pfn, unsigned long end, char *s)
{
unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
for (; pfn < end; pfn++) {
struct page *page = pfn_to_page(pfn);
ClearPageReserved(page);
init_page_count(page);
__free_page(page);
pages++;
}
if (size && s)
printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
return pages;
}
static inline void
free_memmap(unsigned long start_pfn, unsigned long end_pfn)
{
struct page *start_pg, *end_pg;
unsigned long pg, pgend;
/*
* Convert start_pfn/end_pfn to a struct page pointer.
*/
start_pg = pfn_to_page(start_pfn - 1) + 1;
end_pg = pfn_to_page(end_pfn);
/*
* Convert to physical addresses, and
* round start upwards and end downwards.
*/
pg = PAGE_ALIGN(__pa(start_pg));
pgend = __pa(end_pg) & PAGE_MASK;
/*
* If there are free pages between these,
* free the section of the memmap array.
*/
if (pg < pgend)
free_bootmem(pg, pgend - pg);
}
/*
* The mem_map array can get very big. Free the unused area of the memory map.
*/
static void __init free_unused_memmap(struct meminfo *mi)
{
unsigned long bank_start, prev_bank_end = 0;
unsigned int i;
/*
* This relies on each bank being in address order.
* The banks are sorted previously in bootmem_init().
*/
for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
bank_start = bank_pfn_start(bank);
/*
* If we had a previous bank, and there is a space
* between the current bank and the previous, free it.
*/
if (prev_bank_end && prev_bank_end < bank_start)
free_memmap(prev_bank_end, bank_start);
/*
* Align up here since the VM subsystem insists that the
* memmap entries are valid from the bank end aligned to
* MAX_ORDER_NR_PAGES.
*/
prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
}
}
/*
* mem_init() marks the free areas in the mem_map and tells us how much
* memory is free. This is done after various parts of the system have
* claimed their memory after the kernel image.
*/
void __init mem_init(void)
{
unsigned long reserved_pages, free_pages;
struct memblock_region *reg;
int i;
max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
/* this will put all unused low memory onto the freelists */
free_unused_memmap(&meminfo);
totalram_pages += free_all_bootmem();
reserved_pages = free_pages = 0;
for_each_bank(i, &meminfo) {
struct membank *bank = &meminfo.bank[i];
unsigned int pfn1, pfn2;
struct page *page, *end;
pfn1 = bank_pfn_start(bank);
pfn2 = bank_pfn_end(bank);
page = pfn_to_page(pfn1);
end = pfn_to_page(pfn2 - 1) + 1;
do {
if (PageReserved(page))
reserved_pages++;
else if (!page_count(page))
free_pages++;
page++;
} while (page < end);
}
/*
* Since our memory may not be contiguous, calculate the
* real number of pages we have in this system
*/
printk(KERN_INFO "Memory:");
num_physpages = 0;
for_each_memblock(memory, reg) {
unsigned long pages = memblock_region_memory_end_pfn(reg) -
memblock_region_memory_base_pfn(reg);
num_physpages += pages;
printk(" %ldMB", pages >> (20 - PAGE_SHIFT));
}
printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
nr_free_pages() << (PAGE_SHIFT-10),
free_pages << (PAGE_SHIFT-10),
reserved_pages << (PAGE_SHIFT-10),
totalhigh_pages << (PAGE_SHIFT-10));
printk(KERN_NOTICE "Virtual kernel memory layout:\n"
" vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
" lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
" modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
" .init : 0x%p" " - 0x%p" " (%4d kB)\n"
" .text : 0x%p" " - 0x%p" " (%4d kB)\n"
" .data : 0x%p" " - 0x%p" " (%4d kB)\n",
VECTORS_BASE, VECTORS_BASE + PAGE_SIZE,
DIV_ROUND_UP(PAGE_SIZE, SZ_1K),
VMALLOC_START, VMALLOC_END,
DIV_ROUND_UP((VMALLOC_END - VMALLOC_START), SZ_1M),
PAGE_OFFSET, (unsigned long)high_memory,
DIV_ROUND_UP(((unsigned long)high_memory - PAGE_OFFSET), SZ_1M),
MODULES_VADDR, MODULES_END,
DIV_ROUND_UP((MODULES_END - MODULES_VADDR), SZ_1M),
__init_begin, __init_end,
DIV_ROUND_UP((__init_end - __init_begin), SZ_1K),
_stext, _etext,
DIV_ROUND_UP((_etext - _stext), SZ_1K),
_sdata, _edata,
DIV_ROUND_UP((_edata - _sdata), SZ_1K));
BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
BUG_ON(TASK_SIZE > MODULES_VADDR);
if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
/*
* On a machine this small we won't get
* anywhere without overcommit, so turn
* it on by default.
*/
sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
}
}
void free_initmem(void)
{
totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
__phys_to_pfn(__pa(__init_end)),
"init");
}
#ifdef CONFIG_BLK_DEV_INITRD
static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd)
totalram_pages += free_area(__phys_to_pfn(__pa(start)),
__phys_to_pfn(__pa(end)),
"initrd");
}
static int __init keepinitrd_setup(char *__unused)
{
keep_initrd = 1;
return 1;
}
__setup("keepinitrd", keepinitrd_setup);
#endif