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/*
* $Id$
*
* Copyright (C) 2007 OpenWrt.org
*
* Based on arch/mips/mm/init.c
* Copyright (C) 1994 - 2000 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pfn.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/swap.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/mips-boards/prom.h>
static int __init memsize(void)
{
u32 size = (64 << 20);
volatile u32 *addr = (u32 *)KSEG1ADDR(0x14000000 + size - 4);
u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
while (addr > kernel_end) {
*addr = (u32)addr;
size >>= 1;
addr -= size >> 2;
}
do {
addr += size >> 2;
if (*addr != (u32)addr)
break;
size <<= 1;
} while (size < (64 << 20));
return size;
}
#ifdef CONFIG_NEED_MULTIPLE_NODES
static bootmem_data_t node_bootmem_data;
pg_data_t __node_data[1] = {
{
.bdata = &node_bootmem_data
},
};
EXPORT_SYMBOL(__node_data);
unsigned long max_mapnr;
struct page *mem_map;
EXPORT_SYMBOL(max_mapnr);
EXPORT_SYMBOL(mem_map);
static unsigned long setup_zero_pages(void)
{
unsigned int order = 3;
unsigned long size;
struct page *page;
empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!empty_zero_page)
panic("Oh boy, that early out of memory?");
page = virt_to_page(empty_zero_page);
split_page(page, order);
while (page < virt_to_page(empty_zero_page + (PAGE_SIZE << order))) {
SetPageReserved(page);
page++;
}
size = PAGE_SIZE << order;
zero_page_mask = (size - 1) & PAGE_MASK;
return 1UL << order;
}
extern void pagetable_init(void);
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
pagetable_init();
zones_size[ZONE_DMA] = max_low_pfn - min_low_pfn;
free_area_init_node(0, NODE_DATA(0), zones_size, ARCH_PFN_OFFSET, NULL);
}
static struct kcore_list kcore_mem, kcore_vmalloc;
void __init mem_init(void)
{
unsigned long codesize, reservedpages, datasize, initsize;
unsigned long tmp, ram;
unsigned long kernel_start, kernel_end;
kernel_start = PFN_DOWN(CPHYSADDR((unsigned long)&_text));
kernel_end = PFN_UP(CPHYSADDR((unsigned long)&_end));
for (tmp = min_low_pfn + 1; tmp < kernel_start; tmp++) {
ClearPageReserved(pfn_to_page(tmp));
init_page_count(pfn_to_page(tmp));
free_page((unsigned long)__va(tmp << PAGE_SHIFT));
}
totalram_pages += free_all_bootmem();
totalram_pages -= setup_zero_pages(); /* Setup zeroed pages. */
reservedpages = ram = 0;
for (tmp = min_low_pfn; tmp <= max_low_pfn; tmp++) {
ram++;
if (PageReserved(pfn_to_page(tmp)))
if ((tmp < kernel_start) || (tmp > kernel_end))
reservedpages++;
}
num_physpages = ram;
codesize = (unsigned long) &_etext - (unsigned long) &_text;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
kclist_add(&kcore_mem, __va(min_low_pfn),
(max_low_pfn - min_low_pfn) << PAGE_SHIFT);
kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
VMALLOC_END - VMALLOC_START);
printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
"%ldk reserved, %ldk data, %ldk init)\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
ram << (PAGE_SHIFT-10),
codesize >> 10,
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
initsize >> 10);
}
#endif
void __init prom_meminit(void)
{
unsigned long pages;
#ifdef CONFIG_NEED_MULTIPLE_NODES
unsigned long kernel_start, kernel_end;
unsigned long free_pages;
unsigned long bootmap_size;
#endif
pages = memsize() >> PAGE_SHIFT;
add_memory_region(ARCH_PFN_OFFSET << PAGE_SHIFT, pages <<
PAGE_SHIFT, BOOT_MEM_RAM);
#ifdef CONFIG_NEED_MULTIPLE_NODES
kernel_start = PFN_DOWN(CPHYSADDR((unsigned long)&_text));
kernel_end = PFN_UP(CPHYSADDR((unsigned long)&_end));
min_low_pfn = ARCH_PFN_OFFSET;
max_low_pfn = ARCH_PFN_OFFSET + pages;
max_mapnr = max_low_pfn;
free_pages = pages - (kernel_end - min_low_pfn);
bootmap_size = init_bootmem_node(NODE_DATA(0), kernel_end,
ARCH_PFN_OFFSET, max_low_pfn);
free_bootmem(PFN_PHYS(kernel_end), free_pages << PAGE_SHIFT);
memory_present(0, min_low_pfn, max_low_pfn);
reserve_bootmem(PFN_PHYS(kernel_end), bootmap_size);
mem_map = NODE_DATA(0)->node_mem_map;
#endif
}
void __init prom_free_prom_memory(void)
{
return;
}
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