i385 mm cleanup:

  + cleanup init.c and split into pgtable.c
  + split declaration of _text, _etext outside into sections.h

arch/i386/mm/Makefile

@@ -9,7 +9,7 @@
 
 O_TARGET := mm.o
 
-obj-y	 := init.o fault.o ioremap.o extable.o pageattr.o
+obj-y	 := init.o pgtable.o fault.o ioremap.o extable.o pageattr.o 
 export-objs := pageattr.o
 
 include $(TOPDIR)/Rules.make

arch/i386/mm/pgtable.c

+/*
+ *  linux/arch/i386/mm/pgtable.c
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/smp.h>
+#include <linux/highmem.h>
+#include <linux/slab.h>
+
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/fixmap.h>
+#include <asm/e820.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+
+void show_mem(void)
+{
+	int i, total = 0, reserved = 0;
+	int shared = 0, cached = 0;
+	int highmem = 0;
+
+	printk("Mem-info:\n");
+	show_free_areas();
+	printk("Free swap:       %6dkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
+	i = max_mapnr;
+	while (i-- > 0) {
+		total++;
+		if (PageHighMem(mem_map+i))
+			highmem++;
+		if (PageReserved(mem_map+i))
+			reserved++;
+		else if (PageSwapCache(mem_map+i))
+			cached++;
+		else if (page_count(mem_map+i))
+			shared += page_count(mem_map+i) - 1;
+	}
+	printk("%d pages of RAM\n", total);
+	printk("%d pages of HIGHMEM\n",highmem);
+	printk("%d reserved pages\n",reserved);
+	printk("%d pages shared\n",shared);
+	printk("%d pages swap cached\n",cached);
+}
+
+/*
+ * Associate a virtual page frame with a given physical page frame 
+ * and protection flags for that frame.
+ */ 
+static void set_pte_phys (unsigned long vaddr, unsigned long phys, pgprot_t flags)
+{
+	pgd_t *pgd;
+	pmd_t *pmd;
+	pte_t *pte;
+
+	pgd = swapper_pg_dir + __pgd_offset(vaddr);
+	if (pgd_none(*pgd)) {
+		BUG();
+		return;
+	}
+	pmd = pmd_offset(pgd, vaddr);
+	if (pmd_none(*pmd)) {
+		BUG();
+		return;
+	}
+	pte = pte_offset_kernel(pmd, vaddr);
+	/* <phys,flags> stored as-is, to permit clearing entries */
+	set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
+
+	/*
+	 * It's enough to flush this one mapping.
+	 * (PGE mappings get flushed as well)
+	 */
+	__flush_tlb_one(vaddr);
+}
+
+void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
+{
+	unsigned long address = __fix_to_virt(idx);
+
+	if (idx >= __end_of_fixed_addresses) {
+		BUG();
+		return;
+	}
+	set_pte_phys(address, phys, flags);
+}
+
+pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+	int count = 0;
+	pte_t *pte;
+   
+   	do {
+		pte = (pte_t *) __get_free_page(GFP_KERNEL);
+		if (pte)
+			clear_page(pte);
+		else {
+			current->state = TASK_UNINTERRUPTIBLE;
+			schedule_timeout(HZ);
+		}
+	} while (!pte && (count++ < 10));
+	return pte;
+}
+
+struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	int count = 0;
+	struct page *pte;
+   
+   	do {
+#if CONFIG_HIGHPTE
+		pte = alloc_pages(GFP_KERNEL | __GFP_HIGHMEM, 0);
+#else
+		pte = alloc_pages(GFP_KERNEL, 0);
+#endif
+		if (pte)
+			clear_highpage(pte);
+		else {
+			current->state = TASK_UNINTERRUPTIBLE;
+			schedule_timeout(HZ);
+		}
+	} while (!pte && (count++ < 10));
+	return pte;
+}
+
+#if CONFIG_X86_PAE
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	int i;
+	pgd_t *pgd = kmem_cache_alloc(pae_pgd_cachep, GFP_KERNEL);
+
+	if (pgd) {
+		for (i = 0; i < USER_PTRS_PER_PGD; i++) {
+			unsigned long pmd = __get_free_page(GFP_KERNEL);
+			if (!pmd)
+				goto out_oom;
+			clear_page(pmd);
+			set_pgd(pgd + i, __pgd(1 + __pa(pmd)));
+		}
+		memcpy(pgd + USER_PTRS_PER_PGD,
+			swapper_pg_dir + USER_PTRS_PER_PGD,
+			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+	}
+	return pgd;
+out_oom:
+	for (i--; i >= 0; i--)
+		free_page((unsigned long)__va(pgd_val(pgd[i])-1));
+	kmem_cache_free(pae_pgd_cachep, pgd);
+	return NULL;
+}
+
+void pgd_free(pgd_t *pgd)
+{
+	int i;
+
+	for (i = 0; i < USER_PTRS_PER_PGD; i++)
+		free_page((unsigned long)__va(pgd_val(pgd[i])-1));
+	kmem_cache_free(pae_pgd_cachep, pgd);
+}
+
+#else
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
+
+	if (pgd) {
+		memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
+		memcpy(pgd + USER_PTRS_PER_PGD,
+			swapper_pg_dir + USER_PTRS_PER_PGD,
+			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+	}
+	return pgd;
+}
+
+void pgd_free(pgd_t *pgd)
+{
+	free_page((unsigned long)pgd);
+}
+
+#endif /* CONFIG_X86_PAE */
+

include/asm-generic/sections.h

+#ifndef _ASM_GENERIC_SECTIONS_H_
+#define _ASM_GENERIC_SECTIONS_H_
+
+/* References to section boundaries */
+
+extern char _text, _etext;
+extern char _data, _edata;
+extern char __bss_start;
+extern char __init_begin, __init_end;
+
+#endif /* _ASM_GENERIC_SECTIONS_H_ */

include/asm-i386/pgtable-3level.h

@@ -106,4 +106,6 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
 	return __pmd(((unsigned long long)page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
 }
 
+extern struct kmem_cache_s *pae_pgd_cachep;
+
 #endif /* _I386_PGTABLE_3LEVEL_H */

include/asm-i386/sections.h

+#ifndef _I386_SECTIONS_H
+#define _I386_SECTIONS_H
+
+/* nothing to see, move along */
+#include <asm-generic/sections.h>
+
+#endif