ia64/linux-2.6.18-xen.hg

view arch/m68k/mm/sun3mmu.c @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * linux/arch/m68k/mm/sun3mmu.c
3 *
4 * Implementations of mm routines specific to the sun3 MMU.
5 *
6 * Moved here 8/20/1999 Sam Creasey
7 *
8 */
10 #include <linux/signal.h>
11 #include <linux/sched.h>
12 #include <linux/mm.h>
13 #include <linux/swap.h>
14 #include <linux/kernel.h>
15 #include <linux/string.h>
16 #include <linux/types.h>
17 #include <linux/init.h>
18 #include <linux/bootmem.h>
20 #include <asm/setup.h>
21 #include <asm/uaccess.h>
22 #include <asm/page.h>
23 #include <asm/pgtable.h>
24 #include <asm/system.h>
25 #include <asm/machdep.h>
26 #include <asm/io.h>
28 extern void mmu_emu_init (unsigned long bootmem_end);
30 const char bad_pmd_string[] = "Bad pmd in pte_alloc: %08lx\n";
32 extern unsigned long num_pages;
34 void free_initmem(void)
35 {
36 }
38 /* For the sun3 we try to follow the i386 paging_init() more closely */
39 /* start_mem and end_mem have PAGE_OFFSET added already */
40 /* now sets up tables using sun3 PTEs rather than i386 as before. --m */
41 void __init paging_init(void)
42 {
43 pgd_t * pg_dir;
44 pte_t * pg_table;
45 int i;
46 unsigned long address;
47 unsigned long next_pgtable;
48 unsigned long bootmem_end;
49 unsigned long zones_size[MAX_NR_ZONES] = { 0, };
50 unsigned long size;
53 #ifdef TEST_VERIFY_AREA
54 wp_works_ok = 0;
55 #endif
56 empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
57 memset(empty_zero_page, 0, PAGE_SIZE);
59 address = PAGE_OFFSET;
60 pg_dir = swapper_pg_dir;
61 memset (swapper_pg_dir, 0, sizeof (swapper_pg_dir));
62 memset (kernel_pg_dir, 0, sizeof (kernel_pg_dir));
64 size = num_pages * sizeof(pte_t);
65 size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
67 next_pgtable = (unsigned long)alloc_bootmem_pages(size);
68 bootmem_end = (next_pgtable + size + PAGE_SIZE) & PAGE_MASK;
70 /* Map whole memory from PAGE_OFFSET (0x0E000000) */
71 pg_dir += PAGE_OFFSET >> PGDIR_SHIFT;
73 while (address < (unsigned long)high_memory) {
74 pg_table = (pte_t *) __pa (next_pgtable);
75 next_pgtable += PTRS_PER_PTE * sizeof (pte_t);
76 pgd_val(*pg_dir) = (unsigned long) pg_table;
77 pg_dir++;
79 /* now change pg_table to kernel virtual addresses */
80 pg_table = (pte_t *) __va ((unsigned long) pg_table);
81 for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
82 pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
83 if (address >= (unsigned long)high_memory)
84 pte_val (pte) = 0;
85 set_pte (pg_table, pte);
86 address += PAGE_SIZE;
87 }
88 }
90 mmu_emu_init(bootmem_end);
92 current->mm = NULL;
94 /* memory sizing is a hack stolen from motorola.c.. hope it works for us */
95 zones_size[ZONE_DMA] = ((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
97 free_area_init(zones_size);
99 }