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Diffstat (limited to 'arch/blackfin/mm/init.c')
-rw-r--r--arch/blackfin/mm/init.c129
1 files changed, 32 insertions, 97 deletions
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index bb9c98f9cb5..166842de3dc 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -4,9 +4,11 @@
* Licensed under the GPL-2 or later.
*/
+#include <linux/gfp.h>
#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/uaccess.h>
+#include <linux/export.h>
#include <asm/bfin-global.h>
#include <asm/pda.h>
#include <asm/cplbinit.h>
@@ -14,23 +16,11 @@
#include "blackfin_sram.h"
/*
- * BAD_PAGE is the page that is used for page faults when linux
- * is out-of-memory. Older versions of linux just did a
- * do_exit(), but using this instead means there is less risk
- * for a process dying in kernel mode, possibly leaving a inode
- * unused etc..
- *
- * BAD_PAGETABLE is the accompanying page-table: it is initialized
- * to point to BAD_PAGE entries.
- *
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
+ * ZERO_PAGE is a special page that is used for zero-initialized data and COW.
+ * Let the bss do its zero-init magic so we don't have to do it ourselves.
*/
-static unsigned long empty_bad_page_table;
-
-static unsigned long empty_bad_page;
-
-static unsigned long empty_zero_page;
+char empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
+EXPORT_SYMBOL(empty_zero_page);
#ifndef CONFIG_EXCEPTION_L1_SCRATCH
#if defined CONFIG_SYSCALL_TAB_L1
@@ -51,40 +41,27 @@ EXPORT_SYMBOL(cpu_pda);
void __init paging_init(void)
{
/*
- * make sure start_mem is page aligned, otherwise bootmem and
- * page_alloc get different views og the world
+ * make sure start_mem is page aligned, otherwise bootmem and
+ * page_alloc get different views of the world
*/
unsigned long end_mem = memory_end & PAGE_MASK;
- pr_debug("start_mem is %#lx virtual_end is %#lx\n", PAGE_ALIGN(memory_start), end_mem);
-
- /*
- * initialize the bad page table and bad page to point
- * to a couple of allocated pages
- */
- empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
- empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
- empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
- memset((void *)empty_zero_page, 0, PAGE_SIZE);
+ unsigned long zones_size[MAX_NR_ZONES] = {
+ [0] = 0,
+ [ZONE_DMA] = (end_mem - CONFIG_PHY_RAM_BASE_ADDRESS) >> PAGE_SHIFT,
+ [ZONE_NORMAL] = 0,
+#ifdef CONFIG_HIGHMEM
+ [ZONE_HIGHMEM] = 0,
+#endif
+ };
- /*
- * Set up SFC/DFC registers (user data space)
- */
+ /* Set up SFC/DFC registers (user data space) */
set_fs(KERNEL_DS);
- pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
+ pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
PAGE_ALIGN(memory_start), end_mem);
-
- {
- unsigned long zones_size[MAX_NR_ZONES] = { 0, };
-
- zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
- zones_size[ZONE_NORMAL] = 0;
-#ifdef CONFIG_HIGHMEM
- zones_size[ZONE_HIGHMEM] = 0;
-#endif
- free_area_init(zones_size);
- }
+ free_area_init_node(0, zones_size,
+ CONFIG_PHY_RAM_BASE_ADDRESS >> PAGE_SHIFT, NULL);
}
asmlinkage void __init init_pda(void)
@@ -99,9 +76,6 @@ asmlinkage void __init init_pda(void)
valid pointers to it. */
memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
- cpu_pda[0].next = &cpu_pda[1];
- cpu_pda[1].next = &cpu_pda[0];
-
#ifdef CONFIG_EXCEPTION_L1_SCRATCH
cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
L1_SCRATCH_LENGTH);
@@ -116,63 +90,24 @@ asmlinkage void __init init_pda(void)
void __init mem_init(void)
{
- unsigned int codek = 0, datak = 0, initk = 0;
- unsigned int reservedpages = 0, freepages = 0;
- unsigned long tmp;
- unsigned long start_mem = memory_start;
- unsigned long end_mem = memory_end;
-
- end_mem &= PAGE_MASK;
- high_memory = (void *)end_mem;
-
- start_mem = PAGE_ALIGN(start_mem);
- max_mapnr = num_physpages = MAP_NR(high_memory);
- printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", num_physpages);
-
- /* This will put all memory onto the freelists. */
- totalram_pages = free_all_bootmem();
-
- reservedpages = 0;
- for (tmp = 0; tmp < max_mapnr; tmp++)
- if (PageReserved(pfn_to_page(tmp)))
- reservedpages++;
- freepages = max_mapnr - reservedpages;
-
- /* do not count in kernel image between _rambase and _ramstart */
- reservedpages -= (_ramstart - _rambase) >> PAGE_SHIFT;
-#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
- reservedpages += (_ramend - memory_end - DMA_UNCACHED_REGION) >> PAGE_SHIFT;
-#endif
+ char buf[64];
- codek = (_etext - _stext) >> 10;
- initk = (__init_end - __init_begin) >> 10;
- datak = ((_ramstart - _rambase) >> 10) - codek - initk;
+ high_memory = (void *)(memory_end & PAGE_MASK);
+ max_mapnr = MAP_NR(high_memory);
+ printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
- printk(KERN_INFO
- "Memory available: %luk/%luk RAM, "
- "(%uk init code, %uk kernel code, %uk data, %uk dma, %uk reserved)\n",
- (unsigned long) freepages << (PAGE_SHIFT-10), _ramend >> 10,
- initk, codek, datak, DMA_UNCACHED_REGION >> 10, (reservedpages << (PAGE_SHIFT-10)));
-}
+ /* This will put all low memory onto the freelists. */
+ free_all_bootmem();
-static void __init free_init_pages(const char *what, unsigned long begin, unsigned long end)
-{
- unsigned long addr;
- /* next to check that the page we free is not a partial page */
- for (addr = begin; addr + PAGE_SIZE <= end; addr += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- init_page_count(virt_to_page(addr));
- free_page(addr);
- totalram_pages++;
- }
- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+ snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
+ mem_init_print_info(buf);
}
#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
#ifndef CONFIG_MPU
- free_init_pages("initrd memory", start, end);
+ free_reserved_area((void *)start, (void *)end, -1, "initrd");
#endif
}
#endif
@@ -180,8 +115,8 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
void __init_refok free_initmem(void)
{
#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
- free_init_pages("unused kernel memory",
- (unsigned long)(&__init_begin),
- (unsigned long)(&__init_end));
+ free_initmem_default(-1);
+ if (memory_start == (unsigned long)(&__init_end))
+ memory_start = (unsigned long)(&__init_begin);
#endif
}
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