Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 195 insertions, 0 deletions

diff --git a/include/asm-sh64/pgalloc.h b/include/asm-sh64/pgalloc.h
new file mode 100644
index 0000000..b25f5df
--- /dev/null
+++ b/include/asm-sh64/pgalloc.h
@@ -0,0 +1,195 @@
+#ifndef __ASM_SH64_PGALLOC_H
+#define __ASM_SH64_PGALLOC_H
+
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * include/asm-sh64/pgalloc.h
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003, 2004  Paul Mundt
+ * Copyright (C) 2003, 2004  Richard Curnow
+ *
+ */
+
+#include <linux/threads.h>
+#include <linux/mm.h>
+
+#define pgd_quicklist (current_cpu_data.pgd_quick)
+#define pmd_quicklist (current_cpu_data.pmd_quick)
+#define pte_quicklist (current_cpu_data.pte_quick)
+#define pgtable_cache_size (current_cpu_data.pgtable_cache_sz)
+
+static inline void pgd_init(unsigned long page)
+{
+	unsigned long *pgd = (unsigned long *)page;
+	extern pte_t empty_bad_pte_table[PTRS_PER_PTE];
+	int i;
+
+	for (i = 0; i < USER_PTRS_PER_PGD; i++)
+		pgd[i] = (unsigned long)empty_bad_pte_table;
+}
+
+/*
+ * Allocate and free page tables. The xxx_kernel() versions are
+ * used to allocate a kernel page table - this turns on ASN bits
+ * if any.
+ */
+
+extern __inline__ pgd_t *get_pgd_slow(void)
+{
+	unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
+	pgd_t *ret = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
+	return ret;
+}
+
+extern __inline__ pgd_t *get_pgd_fast(void)
+{
+	unsigned long *ret;
+
+	if ((ret = pgd_quicklist) != NULL) {
+		pgd_quicklist = (unsigned long *)(*ret);
+		ret[0] = 0;
+		pgtable_cache_size--;
+	} else
+		ret = (unsigned long *)get_pgd_slow();
+
+	if (ret) {
+		memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
+	}
+	return (pgd_t *)ret;
+}
+
+extern __inline__ void free_pgd_fast(pgd_t *pgd)
+{
+	*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
+	pgd_quicklist = (unsigned long *) pgd;
+	pgtable_cache_size++;
+}
+
+extern __inline__ void free_pgd_slow(pgd_t *pgd)
+{
+	kfree((void *)pgd);
+}
+
+extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long address_preadjusted);
+extern pte_t *get_pte_kernel_slow(pmd_t *pmd, unsigned long address_preadjusted);
+
+extern __inline__ pte_t *get_pte_fast(void)
+{
+	unsigned long *ret;
+
+	if((ret = (unsigned long *)pte_quicklist) != NULL) {
+		pte_quicklist = (unsigned long *)(*ret);
+		ret[0] = ret[1];
+		pgtable_cache_size--;
+	}
+	return (pte_t *)ret;
+}
+
+extern __inline__ void free_pte_fast(pte_t *pte)
+{
+	*(unsigned long *)pte = (unsigned long) pte_quicklist;
+	pte_quicklist = (unsigned long *) pte;
+	pgtable_cache_size++;
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+	free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct page *pte)
+{
+	__free_page(pte);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+					   unsigned long address)
+{
+	pte_t *pte;
+
+	pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT|__GFP_ZERO);
+
+	return pte;
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	struct page *pte;
+
+	pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+
+	return pte;
+}
+
+#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+
+/*
+ * allocating and freeing a pmd is trivial: the 1-entry pmd is
+ * inside the pgd, so has no extra memory associated with it.
+ */
+
+#if defined(CONFIG_SH64_PGTABLE_2_LEVEL)
+
+#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })
+#define pmd_free(x)			do { } while (0)
+#define pgd_populate(mm, pmd, pte)	BUG()
+#define __pte_free_tlb(tlb,pte)		tlb_remove_page((tlb),(pte))
+#define __pmd_free_tlb(tlb,pmd)		do { } while (0)
+
+#elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)
+
+static __inline__ pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	pmd_t *pmd;
+	pmd = (pmd_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+	return pmd;
+}
+
+static __inline__ void pmd_free(pmd_t *pmd)
+{
+	free_page((unsigned long) pmd);
+}
+
+#define pgd_populate(mm, pgd, pmd) pgd_set(pgd, pmd)
+#define __pmd_free_tlb(tlb,pmd)		pmd_free(pmd)
+
+#else
+#error "No defined page table size"
+#endif
+
+#define check_pgt_cache()		do { } while (0)
+#define pgd_free(pgd)		free_pgd_slow(pgd)
+#define pgd_alloc(mm)		get_pgd_fast()
+
+extern int do_check_pgt_cache(int, int);
+
+extern inline void set_pgdir(unsigned long address, pgd_t entry)
+{
+	struct task_struct * p;
+	pgd_t *pgd;
+
+	read_lock(&tasklist_lock);
+	for_each_process(p) {
+		if (!p->mm)
+			continue;
+		*pgd_offset(p->mm,address) = entry;
+	}
+	read_unlock(&tasklist_lock);
+	for (pgd = (pgd_t *)pgd_quicklist; pgd; pgd = (pgd_t *)*(unsigned long *)pgd)
+		pgd[address >> PGDIR_SHIFT] = entry;
+}
+
+#define pmd_populate_kernel(mm, pmd, pte) \
+	set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) (pte)))
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+				struct page *pte)
+{
+	set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) page_address (pte)));
+}
+
+#endif /* __ASM_SH64_PGALLOC_H */