From: Greg Ungerer <[email protected]>
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 <[email protected]>
---
Note that for easier review this was generated with -M.
arch/m68k/mm/{init_mm.c => init.c} | 73 ++++++++++++++++--
arch/m68k/mm/init_no.c | 145 ------------------------------------
2 files changed, 64 insertions(+), 154 deletions(-)
rename arch/m68k/mm/{init_mm.c => init.c} (72%)
delete mode 100644 arch/m68k/mm/init_no.c
diff --git a/arch/m68k/mm/init_mm.c b/arch/m68k/mm/init.c
similarity index 72%
rename from arch/m68k/mm/init_mm.c
rename to arch/m68k/mm/init.c
index 282f9de..d0286db 100644
--- a/arch/m68k/mm/init_mm.c
+++ b/arch/m68k/mm/init.c
@@ -32,6 +32,15 @@
#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);
@@ -60,20 +69,65 @@ void __init m68k_setup_node(int node)
node_set_online(node);
}
+extern void init_pointer_table(unsigned long ptable);
+extern pmd_t *zero_pgtable;
+
+#else /* CONFIG_MMU */
/*
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
+ * 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, };
-void *empty_zero_page;
-EXPORT_SYMBOL(empty_zero_page);
+ high_memory = (void *) end_mem;
-extern void init_pointer_table(unsigned long ptable);
+ empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
+ memset(empty_zero_page, 0, PAGE_SIZE);
-/* References to section boundaries */
+ /*
+ * Set up SFC/DFC registers (user data space).
+ */
+ set_fs (USER_DS);
-extern pmd_t *zero_pgtable;
+ 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]
@@ -151,7 +205,7 @@ void __init mem_init(void)
init_pointer_table((unsigned long)zero_pgtable);
#endif
- printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
+ 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),
@@ -171,6 +225,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
totalram_pages++;
pages++;
}
- printk ("Freeing initrd memory: %dk freed\n", pages);
+ pr_notice("Freeing initrd memory: %luk freed\n",
+ pages << (PAGE_SHIFT - 10));
}
#endif
diff --git a/arch/m68k/mm/init_no.c b/arch/m68k/mm/init_no.c
deleted file mode 100644
index 688e366..0000000
--- a/arch/m68k/mm/init_no.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * linux/arch/m68knommu/mm/init.c
- *
- * Copyright (C) 1998 D. Jeff Dionne <[email protected]>,
- * Kenneth Albanowski <[email protected]>,
- * 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 ([email protected])
- * DEC/2000 -- linux 2.4 support <[email protected]>
- */
-
-#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
-}
-
--
1.7.0.4
lmpx.com only provides a reader for public news (NNTP) servers. It is not
affiliated with the servers or forums shown here and is not responsible for
the content of articles, which is written by their respective authors.