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Diffstat (limited to 'arch/arm/mm/init.c')
-rw-r--r--arch/arm/mm/init.c158
1 files changed, 102 insertions, 56 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index a04ffbbbe253..f6a999465323 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -15,14 +15,15 @@
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/initrd.h>
-#include <linux/sort.h>
#include <linux/highmem.h>
+#include <linux/gfp.h>
#include <asm/mach-types.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/sizes.h>
#include <asm/tlb.h>
+#include <asm/fixmap.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -32,19 +33,21 @@
static unsigned long phys_initrd_start __initdata = 0;
static unsigned long phys_initrd_size __initdata = 0;
-static void __init early_initrd(char **p)
+static int __init early_initrd(char *p)
{
unsigned long start, size;
+ char *endp;
- start = memparse(*p, p);
- if (**p == ',') {
- size = memparse((*p) + 1, p);
+ 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);
+early_param("initrd", early_initrd);
static int __init parse_tag_initrd(const struct tag *tag)
{
@@ -82,9 +85,6 @@ void show_mem(void)
printk("Mem-info:\n");
show_free_areas();
for_each_online_node(node) {
- pg_data_t *n = NODE_DATA(node);
- struct page *map = pgdat_page_nr(n, 0) - n->node_start_pfn;
-
for_each_nodebank (i,mi,node) {
struct membank *bank = &mi->bank[i];
unsigned int pfn1, pfn2;
@@ -93,8 +93,8 @@ void show_mem(void)
pfn1 = bank_pfn_start(bank);
pfn2 = bank_pfn_end(bank);
- page = map + pfn1;
- end = map + pfn2;
+ page = pfn_to_page(pfn1);
+ end = pfn_to_page(pfn2 - 1) + 1;
do {
total++;
@@ -223,20 +223,6 @@ static int __init check_initrd(struct meminfo *mi)
return initrd_node;
}
-static inline void map_memory_bank(struct membank *bank)
-{
-#ifdef CONFIG_MMU
- struct map_desc map;
-
- 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);
-#endif
-}
-
static void __init bootmem_init_node(int node, struct meminfo *mi,
unsigned long start_pfn, unsigned long end_pfn)
{
@@ -246,16 +232,6 @@ static void __init bootmem_init_node(int node, struct meminfo *mi,
int i;
/*
- * Map the memory banks for this node.
- */
- for_each_nodebank(i, mi, node) {
- struct membank *bank = &mi->bank[i];
-
- if (!bank->highmem)
- map_memory_bank(bank);
- }
-
- /*
* Allocate the bootmem bitmap page.
*/
boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
@@ -384,21 +360,12 @@ static void arm_memory_present(struct meminfo *mi, int node)
}
#endif
-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 bootmem_init(void)
{
struct meminfo *mi = &meminfo;
unsigned long min, max_low, max_high;
int node, initrd_node;
- sort(&mi->bank, mi->nr_banks, sizeof(mi->bank[0]), meminfo_cmp, NULL);
-
/*
* Locate which node contains the ramdisk image, if any.
*/
@@ -560,7 +527,7 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi)
*/
void __init mem_init(void)
{
- unsigned int codesize, datasize, initsize;
+ unsigned long reserved_pages, free_pages;
int i, node;
#ifndef CONFIG_DISCONTIGMEM
@@ -596,6 +563,30 @@ void __init mem_init(void)
totalram_pages += totalhigh_pages;
#endif
+ reserved_pages = free_pages = 0;
+
+ for_each_online_node(node) {
+ for_each_nodebank(i, &meminfo, node) {
+ 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
@@ -608,16 +599,71 @@ void __init mem_init(void)
}
printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
- codesize = _etext - _text;
- datasize = _end - _data;
- initsize = __init_end - __init_begin;
-
- printk(KERN_NOTICE "Memory: %luKB available (%dK code, "
- "%dK data, %dK init, %luK highmem)\n",
- nr_free_pages() << (PAGE_SHIFT-10), codesize >> 10,
- datasize >> 10, initsize >> 10,
+ 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));
+#define MLK(b, t) b, t, ((t) - (b)) >> 10
+#define MLM(b, t) b, t, ((t) - (b)) >> 20
+#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
+
+ printk(KERN_NOTICE "Virtual kernel memory layout:\n"
+ " vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+#ifdef CONFIG_MMU
+ " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n"
+#endif
+ " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
+ " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
+#ifdef CONFIG_HIGHMEM
+ " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
+#endif
+ " 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",
+
+ MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
+ (PAGE_SIZE)),
+ MLK(FIXADDR_START, FIXADDR_TOP),
+#ifdef CONFIG_MMU
+ MLM(CONSISTENT_BASE, CONSISTENT_END),
+#endif
+ MLM(VMALLOC_START, VMALLOC_END),
+ MLM(PAGE_OFFSET, (unsigned long)high_memory),
+#ifdef CONFIG_HIGHMEM
+ MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
+ (PAGE_SIZE)),
+#endif
+ MLM(MODULES_VADDR, MODULES_END),
+
+ MLK_ROUNDUP(__init_begin, __init_end),
+ MLK_ROUNDUP(_text, _etext),
+ MLK_ROUNDUP(_data, _edata));
+
+#undef MLK
+#undef MLM
+#undef MLK_ROUNDUP
+
+ /*
+ * Check boundaries twice: Some fundamental inconsistencies can
+ * be detected at build time already.
+ */
+#ifdef CONFIG_MMU
+ BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE);
+ BUG_ON(VMALLOC_END > CONSISTENT_BASE);
+
+ BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
+ BUG_ON(TASK_SIZE > MODULES_VADDR);
+#endif
+
+#ifdef CONFIG_HIGHMEM
+ BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
+ BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
+#endif
+
if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
extern int sysctl_overcommit_memory;
/*
@@ -632,10 +678,10 @@ void __init mem_init(void)
void free_initmem(void)
{
#ifdef CONFIG_HAVE_TCM
- extern char *__tcm_start, *__tcm_end;
+ extern char __tcm_start, __tcm_end;
- totalram_pages += free_area(__phys_to_pfn(__pa(__tcm_start)),
- __phys_to_pfn(__pa(__tcm_end)),
+ totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)),
+ __phys_to_pfn(__pa(&__tcm_end)),
"TCM link");
#endif
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