aboutsummaryrefslogtreecommitdiff
path: root/arch/m68k/mm/init.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/mm/init.c')
-rw-r--r--arch/m68k/mm/init.c194
1 files changed, 114 insertions, 80 deletions
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index c45beb95594..acaff6a49e3 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -7,7 +7,7 @@
* to motorola.c and sun3mmu.c
*/
-#include <linux/config.h>
+#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/mm.h>
@@ -17,100 +17,140 @@
#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/system.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>
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-
/*
* ZERO_PAGE is a special page that is used for zero-initialized
* data and COW.
*/
-
void *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
-void show_mem(void)
-{
- unsigned long i;
- int free = 0, total = 0, reserved = 0, shared = 0;
- int cached = 0;
-
- printk("\nMem-info:\n");
- show_free_areas();
- printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
- i = max_mapnr;
- while (i-- > 0) {
- total++;
- if (PageReserved(mem_map+i))
- reserved++;
- else if (PageSwapCache(mem_map+i))
- cached++;
- else if (!page_count(mem_map+i))
- free++;
- else
- shared += page_count(mem_map+i) - 1;
- }
- printk("%d pages of RAM\n",total);
- printk("%d free pages\n",free);
- printk("%d reserved pages\n",reserved);
- printk("%d pages shared\n",shared);
- printk("%d pages swap cached\n",cached);
-}
-
+#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
extern void init_pointer_table(unsigned long ptable);
+extern pmd_t *zero_pgtable;
+#endif
-/* References to section boundaries */
+#ifdef CONFIG_MMU
-extern char _text, _etext, _edata, __bss_start, _end;
-extern char __init_begin, __init_end;
+pg_data_t pg_data_map[MAX_NUMNODES];
+EXPORT_SYMBOL(pg_data_map);
-extern pmd_t *zero_pgtable;
+int m68k_virt_to_node_shift;
-void __init mem_init(void)
+#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)
{
- int codepages = 0;
- int datapages = 0;
- int initpages = 0;
- unsigned long tmp;
-#ifndef CONFIG_SUN3
- int i;
+#ifndef CONFIG_SINGLE_MEMORY_CHUNK
+ struct m68k_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);
+}
- max_mapnr = num_physpages = (((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT);
+#else /* CONFIG_MMU */
-#ifdef CONFIG_ATARI
- if (MACH_IS_ATARI)
- atari_stram_mem_init_hook();
+/*
+ * 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);
+}
+
+#endif /* CONFIG_MMU */
+
+void free_initmem(void)
+{
+#ifndef CONFIG_MMU_SUN3
+ free_initmem_default(-1);
+#endif /* CONFIG_MMU_SUN3 */
+}
+
+#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
+#define VECTORS &vectors[0]
+#else
+#define VECTORS _ramvec
#endif
- /* this will put all memory onto the freelists */
- totalram_pages = free_all_bootmem();
-
- for (tmp = PAGE_OFFSET ; tmp < (unsigned long)high_memory; tmp += PAGE_SIZE) {
- if (PageReserved(virt_to_page(tmp))) {
- if (tmp >= (unsigned long)&_text
- && tmp < (unsigned long)&_etext)
- codepages++;
- else if (tmp >= (unsigned long) &__init_begin
- && tmp < (unsigned long) &__init_end)
- initpages++;
- else
- datapages++;
- continue;
- }
- }
+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));
+}
+
+static inline void init_pointer_tables(void)
+{
+#if defined(CONFIG_MMU) && !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
+ int i;
-#ifndef CONFIG_SUN3
/* 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++) {
@@ -122,26 +162,20 @@ void __init mem_init(void)
if (zero_pgtable)
init_pointer_table((unsigned long)zero_pgtable);
#endif
+}
- printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
- (unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
- max_mapnr << (PAGE_SHIFT-10),
- codepages << (PAGE_SHIFT-10),
- datapages << (PAGE_SHIFT-10),
- initpages << (PAGE_SHIFT-10));
+void __init mem_init(void)
+{
+ /* this will put all memory onto the freelists */
+ free_all_bootmem();
+ init_pointer_tables();
+ mem_init_print_info(NULL);
+ 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));
- set_page_count(virt_to_page(start), 1);
- free_page(start);
- totalram_pages++;
- pages++;
- }
- printk ("Freeing initrd memory: %dk freed\n", pages);
+ free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:23:53 +0000