#include <linux/stddef.h>
#include <linux/bootmem.h>
-#include <linux/gfp.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/swap.h>
+#include <linux/slab.h>
#include <asm/fixmap.h>
#include <asm/page.h>
#include "as-layout.h"
/* allocated in paging_init, zeroed in mem_init, and unchanged thereafter */
unsigned long *empty_zero_page = NULL;
/* allocated in paging_init and unchanged thereafter */
-unsigned long *empty_bad_page = NULL;
+static unsigned long *empty_bad_page = NULL;
+
+/*
+ * Initialized during boot, and readonly for initializing page tables
+ * afterwards
+ */
pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
+/* Initialized at boot time, and readonly after that */
unsigned long long highmem;
int kmalloc_ok = 0;
+/* Used during early boot */
static unsigned long brk_end;
-void unmap_physmem(void)
-{
- os_unmap_memory((void *) brk_end, uml_reserved - brk_end);
-}
-
-static void map_cb(void *unused)
-{
- map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
-}
-
#ifdef CONFIG_HIGHMEM
static void setup_highmem(unsigned long highmem_start,
unsigned long highmem_len)
* to be turned on.
*/
brk_end = (unsigned long) UML_ROUND_UP(sbrk(0));
- map_cb(NULL);
- initial_thread_cb(map_cb, NULL);
+ map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
free_bootmem(__pa(brk_end), uml_reserved - brk_end);
uml_reserved = brk_end;
num_physpages = totalram_pages;
max_pfn = totalram_pages;
printk(KERN_INFO "Memory: %luk available\n",
- (unsigned long) nr_free_pages() << (PAGE_SHIFT-10));
+ nr_free_pages() << (PAGE_SHIFT-10));
kmalloc_ok = 1;
#ifdef CONFIG_HIGHMEM
#endif
}
-struct page *arch_validate(struct page *page, gfp_t mask, int order)
-{
- unsigned long addr, zero = 0;
- int i;
-
- again:
- if (page == NULL)
- return page;
- if (PageHighMem(page))
- return page;
-
- addr = (unsigned long) page_address(page);
- for (i = 0; i < (1 << order); i++) {
- current->thread.fault_addr = (void *) addr;
- if (__do_copy_to_user((void __user *) addr, &zero,
- sizeof(zero),
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher)) {
- if (!(mask & __GFP_WAIT))
- return NULL;
- else break;
- }
- addr += PAGE_SIZE;
- }
-
- if (i == (1 << order))
- return page;
- page = alloc_pages(mask, order);
- goto again;
-}
-
/*
* This can't do anything because nothing in the kernel image can be freed
* since it's not in kernel physical memory.
}
#endif
-void show_mem(void)
-{
- int pfn, total = 0, reserved = 0;
- int shared = 0, cached = 0;
- int highmem = 0;
- struct page *page;
-
- printk(KERN_INFO "Mem-info:\n");
- show_free_areas();
- printk(KERN_INFO "Free swap: %6ldkB\n",
- nr_swap_pages<<(PAGE_SHIFT-10));
- pfn = max_mapnr;
- while (pfn-- > 0) {
- page = pfn_to_page(pfn);
- total++;
- if (PageHighMem(page))
- highmem++;
- if (PageReserved(page))
- reserved++;
- else if (PageSwapCache(page))
- cached++;
- else if (page_count(page))
- shared += page_count(page) - 1;
- }
- printk(KERN_INFO "%d pages of RAM\n", total);
- printk(KERN_INFO "%d pages of HIGHMEM\n", highmem);
- printk(KERN_INFO "%d reserved pages\n", reserved);
- printk(KERN_INFO "%d pages shared\n", shared);
- printk(KERN_INFO "%d pages swap cached\n", cached);
-}
-
/* Allocate and free page tables. */
pgd_t *pgd_alloc(struct mm_struct *mm)
return pte;
}
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+ if (pte)
+ pgtable_page_ctor(pte);
return pte;
}
return pmd;
}
#endif
+
+void *uml_kmalloc(int size, int flags)
+{
+ return kmalloc(size, flags);
+}