m68k: merge MMU and non-MMU versions of mm/init.c
Greg Ungerer [Wed, 24 Oct 2012 12:36:27 +0000 (22:36 +1000)]
Some of the code in the existing mm/init_mm.c and mm/init_no.c files is
the same, and if we merge them back to a single file we can save some code
duplication.

Although the old mem_init() code for non-MMU was a little different than
the MMU version, it turns out we can use the same code. So I now we just
use the MMU mem_init() code for all. It also means we now get identical
console info messages for this code on kernel boot up.

So merge the two files back into a single file.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/mm/init.c
arch/m68k/mm/init_mm.c [deleted file]
arch/m68k/mm/init_no.c [deleted file]

index 27b5ce0..b0f201a 100644 (file)
@@ -1,5 +1,231 @@
+/*
+ *  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
-#include "init_mm.c"
+
+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
-#include "init_no.c"
+#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
diff --git a/arch/m68k/mm/init_mm.c b/arch/m68k/mm/init_mm.c
deleted file mode 100644 (file)
index 282f9de..0000000
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- *  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>
-
-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);
-}
-
-
-/*
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
- */
-
-void *empty_zero_page;
-EXPORT_SYMBOL(empty_zero_page);
-
-extern void init_pointer_table(unsigned long ptable);
-
-/* References to section boundaries */
-
-extern pmd_t *zero_pgtable;
-
-#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
-
-       printk("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++;
-       }
-       printk ("Freeing initrd memory: %dk freed\n", pages);
-}
-#endif
diff --git a/arch/m68k/mm/init_no.c b/arch/m68k/mm/init_no.c
deleted file mode 100644 (file)
index 688e366..0000000
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- *  linux/arch/m68knommu/mm/init.c
- *
- *  Copyright (C) 1998  D. Jeff Dionne <jeff@lineo.ca>,
- *                      Kenneth Albanowski <kjahds@kjahds.com>,
- *  Copyright (C) 2000  Lineo, Inc.  (www.lineo.com) 
- *
- *  Based on:
- *
- *  linux/arch/m68k/mm/init.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- *
- *  JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com)
- *  DEC/2000 -- linux 2.4 support <davidm@snapgear.com>
- */
-
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/init.h>
-#include <linux/highmem.h>
-#include <linux/pagemap.h>
-#include <linux/bootmem.h>
-#include <linux/gfp.h>
-
-#include <asm/setup.h>
-#include <asm/sections.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/machdep.h>
-
-/*
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
- */
-void *empty_zero_page;
-
-/*
- * 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, };
-
-       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 __init mem_init(void)
-{
-       int codek = 0, datak = 0, initk = 0;
-       unsigned long tmp;
-       unsigned long len = _ramend - _rambase;
-       unsigned long start_mem = memory_start; /* DAVIDM - these must start at end of kernel */
-       unsigned long end_mem   = memory_end; /* DAVIDM - this must not include kernel stack at top */
-
-       pr_debug("Mem_init: start=%lx, end=%lx\n", start_mem, end_mem);
-
-       end_mem &= PAGE_MASK;
-       high_memory = (void *) end_mem;
-
-       start_mem = PAGE_ALIGN(start_mem);
-       max_mapnr = num_physpages = (((unsigned long) high_memory) - PAGE_OFFSET) >> PAGE_SHIFT;
-
-       /* this will put all memory onto the freelists */
-       totalram_pages = free_all_bootmem();
-
-       codek = (_etext - _stext) >> 10;
-       datak = (__bss_stop - _sdata) >> 10;
-       initk = (__init_begin - __init_end) >> 10;
-
-       tmp = nr_free_pages() << PAGE_SHIFT;
-       printk(KERN_INFO "Memory available: %luk/%luk RAM, (%dk kernel code, %dk data)\n",
-              tmp >> 10,
-              len >> 10,
-              codek,
-              datak
-              );
-}
-
-
-#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: %luk freed\n",
-                 pages * (PAGE_SIZE / 1024));
-}
-#endif
-
-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
-}
-