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/*
* linux/arch/m68k/mm/init.c
*
* Copyright (C) 1995 Hamish Macdonald
*
* Contains common initialization routines, specific init code moved
* to motorola.c and sun3mmu.c
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/gfp.h>
#include <asm/setup.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/io.h>
#ifdef CONFIG_ATARI
#include <asm/atari_stram.h>
#endif
#include <asm/sections.h>
#include <asm/tlb.h>
/*
* ZERO_PAGE is a special page that is used for zero-initialized
* data and COW.
*/
void *empty_zero_page;
EXPORT_SYMBOL(empty_zero_page);
#ifdef CONFIG_MMU
pg_data_t pg_data_map[MAX_NUMNODES];
EXPORT_SYMBOL(pg_data_map);
int m68k_virt_to_node_shift;
#ifndef CONFIG_SINGLE_MEMORY_CHUNK
pg_data_t *pg_data_table[65];
EXPORT_SYMBOL(pg_data_table);
#endif
void __init m68k_setup_node(int node)
{
#ifndef CONFIG_SINGLE_MEMORY_CHUNK
struct mem_info *info = m68k_memory + node;
int i, end;
i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
for (; i <= end; i++) {
if (pg_data_table[i])
printk("overlap at %u for chunk %u\n", i, node);
pg_data_table[i] = pg_data_map + node;
}
#endif
pg_data_map[node].bdata = bootmem_node_data + node;
node_set_online(node);
}
extern void init_pointer_table(unsigned long ptable);
extern pmd_t *zero_pgtable;
#else /* CONFIG_MMU */
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
/*
* 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;
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
high_memory = (void *) end_mem;
empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
memset(empty_zero_page, 0, PAGE_SIZE);
/*
* Set up SFC/DFC registers (user data space).
*/
set_fs (USER_DS);
zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
void free_initmem(void)
{
#ifdef CONFIG_RAMKERNEL
unsigned long addr;
/*
* The following code should be cool even if these sections
* are not page aligned.
*/
addr = PAGE_ALIGN((unsigned long) __init_begin);
/* next to check that the page we free is not a partial page */
for (; addr + PAGE_SIZE < ((unsigned long) __init_end); addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
}
pr_notice("Freeing unused kernel memory: %luk freed (0x%x - 0x%x)\n",
(addr - PAGE_ALIGN((unsigned long) __init_begin)) >> 10,
(int)(PAGE_ALIGN((unsigned long) __init_begin)),
(int)(addr - PAGE_SIZE));
#endif
}
#endif /* CONFIG_MMU */
#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
#define VECTORS &vectors[0]
#else
#define VECTORS _ramvec
#endif
void __init print_memmap(void)
{
#define UL(x) ((unsigned long) (x))
#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
pr_notice("Virtual kernel memory layout:\n"
" vector : 0x%08lx - 0x%08lx (%4ld KiB)\n"
" kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n"
" vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n"
" lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n"
" .init : 0x%p" " - 0x%p" " (%4d KiB)\n"
" .text : 0x%p" " - 0x%p" " (%4d KiB)\n"
" .data : 0x%p" " - 0x%p" " (%4d KiB)\n"
" .bss : 0x%p" " - 0x%p" " (%4d KiB)\n",
MLK(VECTORS, VECTORS + 256),
MLM(KMAP_START, KMAP_END),
MLM(VMALLOC_START, VMALLOC_END),
MLM(PAGE_OFFSET, (unsigned long)high_memory),
MLK_ROUNDUP(__init_begin, __init_end),
MLK_ROUNDUP(_stext, _etext),
MLK_ROUNDUP(_sdata, _edata),
MLK_ROUNDUP(__bss_start, __bss_stop));
}
void __init mem_init(void)
{
pg_data_t *pgdat;
int codepages = 0;
int datapages = 0;
int initpages = 0;
int i;
/* this will put all memory onto the freelists */
totalram_pages = num_physpages = 0;
for_each_online_pgdat(pgdat) {
num_physpages += pgdat->node_present_pages;
totalram_pages += free_all_bootmem_node(pgdat);
for (i = 0; i < pgdat->node_spanned_pages; i++) {
struct page *page = pgdat->node_mem_map + i;
char *addr = page_to_virt(page);
if (!PageReserved(page))
continue;
if (addr >= _text &&
addr < _etext)
codepages++;
else if (addr >= __init_begin &&
addr < __init_end)
initpages++;
else
datapages++;
}
}
#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
/* insert pointer tables allocated so far into the tablelist */
init_pointer_table((unsigned long)kernel_pg_dir);
for (i = 0; i < PTRS_PER_PGD; i++) {
if (pgd_present(kernel_pg_dir[i]))
init_pointer_table(__pgd_page(kernel_pg_dir[i]));
}
/* insert also pointer table that we used to unmap the zero page */
if (zero_pgtable)
init_pointer_table((unsigned long)zero_pgtable);
#endif
pr_info("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
nr_free_pages() << (PAGE_SHIFT-10),
totalram_pages << (PAGE_SHIFT-10),
codepages << (PAGE_SHIFT-10),
datapages << (PAGE_SHIFT-10),
initpages << (PAGE_SHIFT-10));
print_memmap();
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
int pages = 0;
for (; start < end; start += PAGE_SIZE) {
ClearPageReserved(virt_to_page(start));
init_page_count(virt_to_page(start));
free_page(start);
totalram_pages++;
pages++;
}
pr_notice("Freeing initrd memory: %dk freed\n",
pages << (PAGE_SHIFT - 10));
}
#endif
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