Linux-2.6.12-rc2v2.6.12-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, 2274 insertions, 0 deletions

diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
new file mode 100644
index 000000000000..c89a803cbc20
--- /dev/null
+++ b/arch/sparc/mm/srmmu.c
@@ -0,0 +1,2274 @@
+/*
+ * srmmu.c:  SRMMU specific routines for memory management.
+ *
+ * Copyright (C) 1995 David S. Miller  (davem@caip.rutgers.edu)
+ * Copyright (C) 1995,2002 Pete Zaitcev (zaitcev@yahoo.com)
+ * Copyright (C) 1996 Eddie C. Dost    (ecd@skynet.be)
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1999,2000 Anton Blanchard (anton@samba.org)
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/bootmem.h>
+#include <linux/fs.h>
+#include <linux/seq_file.h>
+
+#include <asm/bitext.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/kdebug.h>
+#include <asm/vaddrs.h>
+#include <asm/traps.h>
+#include <asm/smp.h>
+#include <asm/mbus.h>
+#include <asm/cache.h>
+#include <asm/oplib.h>
+#include <asm/sbus.h>
+#include <asm/asi.h>
+#include <asm/msi.h>
+#include <asm/a.out.h>
+#include <asm/mmu_context.h>
+#include <asm/io-unit.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+
+/* Now the cpu specific definitions. */
+#include <asm/viking.h>
+#include <asm/mxcc.h>
+#include <asm/ross.h>
+#include <asm/tsunami.h>
+#include <asm/swift.h>
+#include <asm/turbosparc.h>
+
+#include <asm/btfixup.h>
+
+enum mbus_module srmmu_modtype;
+unsigned int hwbug_bitmask;
+int vac_cache_size;
+int vac_line_size;
+
+extern struct resource sparc_iomap;
+
+extern unsigned long last_valid_pfn;
+
+extern unsigned long page_kernel;
+
+pgd_t *srmmu_swapper_pg_dir;
+
+#ifdef CONFIG_SMP
+#define FLUSH_BEGIN(mm)
+#define FLUSH_END
+#else
+#define FLUSH_BEGIN(mm) if((mm)->context != NO_CONTEXT) {
+#define FLUSH_END	}
+#endif
+
+BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
+#define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
+
+int flush_page_for_dma_global = 1;
+
+#ifdef CONFIG_SMP
+BTFIXUPDEF_CALL(void, local_flush_page_for_dma, unsigned long)
+#define local_flush_page_for_dma(page) BTFIXUP_CALL(local_flush_page_for_dma)(page)
+#endif
+
+char *srmmu_name;
+
+ctxd_t *srmmu_ctx_table_phys;
+ctxd_t *srmmu_context_table;
+
+int viking_mxcc_present;
+static DEFINE_SPINLOCK(srmmu_context_spinlock);
+
+int is_hypersparc;
+
+/*
+ * In general all page table modifications should use the V8 atomic
+ * swap instruction.  This insures the mmu and the cpu are in sync
+ * with respect to ref/mod bits in the page tables.
+ */
+static inline unsigned long srmmu_swap(unsigned long *addr, unsigned long value)
+{
+	__asm__ __volatile__("swap [%2], %0" : "=&r" (value) : "0" (value), "r" (addr));
+	return value;
+}
+
+static inline void srmmu_set_pte(pte_t *ptep, pte_t pteval)
+{
+	srmmu_swap((unsigned long *)ptep, pte_val(pteval));
+}
+
+/* The very generic SRMMU page table operations. */
+static inline int srmmu_device_memory(unsigned long x)
+{
+	return ((x & 0xF0000000) != 0);
+}
+
+int srmmu_cache_pagetables;
+
+/* these will be initialized in srmmu_nocache_calcsize() */
+unsigned long srmmu_nocache_size;
+unsigned long srmmu_nocache_end;
+
+/* 1 bit <=> 256 bytes of nocache <=> 64 PTEs */
+#define SRMMU_NOCACHE_BITMAP_SHIFT (PAGE_SHIFT - 4)
+
+/* The context table is a nocache user with the biggest alignment needs. */
+#define SRMMU_NOCACHE_ALIGN_MAX (sizeof(ctxd_t)*SRMMU_MAX_CONTEXTS)
+
+void *srmmu_nocache_pool;
+void *srmmu_nocache_bitmap;
+static struct bit_map srmmu_nocache_map;
+
+static unsigned long srmmu_pte_pfn(pte_t pte)
+{
+	if (srmmu_device_memory(pte_val(pte))) {
+		/* Just return something that will cause
+		 * pfn_valid() to return false.  This makes
+		 * copy_one_pte() to just directly copy to
+		 * PTE over.
+		 */
+		return ~0UL;
+	}
+	return (pte_val(pte) & SRMMU_PTE_PMASK) >> (PAGE_SHIFT-4);
+}
+
+static struct page *srmmu_pmd_page(pmd_t pmd)
+{
+
+	if (srmmu_device_memory(pmd_val(pmd)))
+		BUG();
+	return pfn_to_page((pmd_val(pmd) & SRMMU_PTD_PMASK) >> (PAGE_SHIFT-4));
+}
+
+static inline unsigned long srmmu_pgd_page(pgd_t pgd)
+{ return srmmu_device_memory(pgd_val(pgd))?~0:(unsigned long)__nocache_va((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4); }
+
+
+static inline int srmmu_pte_none(pte_t pte)
+{ return !(pte_val(pte) & 0xFFFFFFF); }
+
+static inline int srmmu_pte_present(pte_t pte)
+{ return ((pte_val(pte) & SRMMU_ET_MASK) == SRMMU_ET_PTE); }
+
+static inline int srmmu_pte_read(pte_t pte)
+{ return !(pte_val(pte) & SRMMU_NOREAD); }
+
+static inline void srmmu_pte_clear(pte_t *ptep)
+{ srmmu_set_pte(ptep, __pte(0)); }
+
+static inline int srmmu_pmd_none(pmd_t pmd)
+{ return !(pmd_val(pmd) & 0xFFFFFFF); }
+
+static inline int srmmu_pmd_bad(pmd_t pmd)
+{ return (pmd_val(pmd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
+
+static inline int srmmu_pmd_present(pmd_t pmd)
+{ return ((pmd_val(pmd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
+
+static inline void srmmu_pmd_clear(pmd_t *pmdp) {
+	int i;
+	for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++)
+		srmmu_set_pte((pte_t *)&pmdp->pmdv[i], __pte(0));
+}
+
+static inline int srmmu_pgd_none(pgd_t pgd)          
+{ return !(pgd_val(pgd) & 0xFFFFFFF); }
+
+static inline int srmmu_pgd_bad(pgd_t pgd)
+{ return (pgd_val(pgd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
+
+static inline int srmmu_pgd_present(pgd_t pgd)
+{ return ((pgd_val(pgd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
+
+static inline void srmmu_pgd_clear(pgd_t * pgdp)
+{ srmmu_set_pte((pte_t *)pgdp, __pte(0)); }
+
+static inline pte_t srmmu_pte_wrprotect(pte_t pte)
+{ return __pte(pte_val(pte) & ~SRMMU_WRITE);}
+
+static inline pte_t srmmu_pte_mkclean(pte_t pte)
+{ return __pte(pte_val(pte) & ~SRMMU_DIRTY);}
+
+static inline pte_t srmmu_pte_mkold(pte_t pte)
+{ return __pte(pte_val(pte) & ~SRMMU_REF);}
+
+static inline pte_t srmmu_pte_mkwrite(pte_t pte)
+{ return __pte(pte_val(pte) | SRMMU_WRITE);}
+
+static inline pte_t srmmu_pte_mkdirty(pte_t pte)
+{ return __pte(pte_val(pte) | SRMMU_DIRTY);}
+
+static inline pte_t srmmu_pte_mkyoung(pte_t pte)
+{ return __pte(pte_val(pte) | SRMMU_REF);}
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+static pte_t srmmu_mk_pte(struct page *page, pgprot_t pgprot)
+{ return __pte((page_to_pfn(page) << (PAGE_SHIFT-4)) | pgprot_val(pgprot)); }
+
+static pte_t srmmu_mk_pte_phys(unsigned long page, pgprot_t pgprot)
+{ return __pte(((page) >> 4) | pgprot_val(pgprot)); }
+
+static pte_t srmmu_mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
+{ return __pte(((page) >> 4) | (space << 28) | pgprot_val(pgprot)); }
+
+/* XXX should we hyper_flush_whole_icache here - Anton */
+static inline void srmmu_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
+{ srmmu_set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pgdp) >> 4))); }
+
+static inline void srmmu_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
+{ srmmu_set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pmdp) >> 4))); }
+
+static void srmmu_pmd_set(pmd_t *pmdp, pte_t *ptep)
+{
+	unsigned long ptp;	/* Physical address, shifted right by 4 */
+	int i;
+
+	ptp = __nocache_pa((unsigned long) ptep) >> 4;
+	for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
+		srmmu_set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
+		ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
+	}
+}
+
+static void srmmu_pmd_populate(pmd_t *pmdp, struct page *ptep)
+{
+	unsigned long ptp;	/* Physical address, shifted right by 4 */
+	int i;
+
+	ptp = page_to_pfn(ptep) << (PAGE_SHIFT-4);	/* watch for overflow */
+	for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
+		srmmu_set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
+		ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
+	}
+}
+
+static inline pte_t srmmu_pte_modify(pte_t pte, pgprot_t newprot)
+{ return __pte((pte_val(pte) & SRMMU_CHG_MASK) | pgprot_val(newprot)); }
+
+/* to find an entry in a top-level page table... */
+extern inline pgd_t *srmmu_pgd_offset(struct mm_struct * mm, unsigned long address)
+{ return mm->pgd + (address >> SRMMU_PGDIR_SHIFT); }
+
+/* Find an entry in the second-level page table.. */
+static inline pmd_t *srmmu_pmd_offset(pgd_t * dir, unsigned long address)
+{
+	return (pmd_t *) srmmu_pgd_page(*dir) +
+	    ((address >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
+}
+
+/* Find an entry in the third-level page table.. */ 
+static inline pte_t *srmmu_pte_offset(pmd_t * dir, unsigned long address)
+{
+	void *pte;
+
+	pte = __nocache_va((dir->pmdv[0] & SRMMU_PTD_PMASK) << 4);
+	return (pte_t *) pte +
+	    ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
+}
+
+static unsigned long srmmu_swp_type(swp_entry_t entry)
+{
+	return (entry.val >> SRMMU_SWP_TYPE_SHIFT) & SRMMU_SWP_TYPE_MASK;
+}
+
+static unsigned long srmmu_swp_offset(swp_entry_t entry)
+{
+	return (entry.val >> SRMMU_SWP_OFF_SHIFT) & SRMMU_SWP_OFF_MASK;
+}
+
+static swp_entry_t srmmu_swp_entry(unsigned long type, unsigned long offset)
+{
+	return (swp_entry_t) {
+		  (type & SRMMU_SWP_TYPE_MASK) << SRMMU_SWP_TYPE_SHIFT
+		| (offset & SRMMU_SWP_OFF_MASK) << SRMMU_SWP_OFF_SHIFT };
+}
+
+/*
+ * size: bytes to allocate in the nocache area.
+ * align: bytes, number to align at.
+ * Returns the virtual address of the allocated area.
+ */
+static unsigned long __srmmu_get_nocache(int size, int align)
+{
+	int offset;
+
+	if (size < SRMMU_NOCACHE_BITMAP_SHIFT) {
+		printk("Size 0x%x too small for nocache request\n", size);
+		size = SRMMU_NOCACHE_BITMAP_SHIFT;
+	}
+	if (size & (SRMMU_NOCACHE_BITMAP_SHIFT-1)) {
+		printk("Size 0x%x unaligned int nocache request\n", size);
+		size += SRMMU_NOCACHE_BITMAP_SHIFT-1;
+	}
+	BUG_ON(align > SRMMU_NOCACHE_ALIGN_MAX);
+
+	offset = bit_map_string_get(&srmmu_nocache_map,
+		       			size >> SRMMU_NOCACHE_BITMAP_SHIFT,
+					align >> SRMMU_NOCACHE_BITMAP_SHIFT);
+	if (offset == -1) {
+		printk("srmmu: out of nocache %d: %d/%d\n",
+		    size, (int) srmmu_nocache_size,
+		    srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
+		return 0;
+	}
+
+	return (SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT));
+}
+
+unsigned inline long srmmu_get_nocache(int size, int align)
+{
+	unsigned long tmp;
+
+	tmp = __srmmu_get_nocache(size, align);
+
+	if (tmp)
+		memset((void *)tmp, 0, size);
+
+	return tmp;
+}
+
+void srmmu_free_nocache(unsigned long vaddr, int size)
+{
+	int offset;
+
+	if (vaddr < SRMMU_NOCACHE_VADDR) {
+		printk("Vaddr %lx is smaller than nocache base 0x%lx\n",
+		    vaddr, (unsigned long)SRMMU_NOCACHE_VADDR);
+		BUG();
+	}
+	if (vaddr+size > srmmu_nocache_end) {
+		printk("Vaddr %lx is bigger than nocache end 0x%lx\n",
+		    vaddr, srmmu_nocache_end);
+		BUG();
+	}
+	if (size & (size-1)) {
+		printk("Size 0x%x is not a power of 2\n", size);
+		BUG();
+	}
+	if (size < SRMMU_NOCACHE_BITMAP_SHIFT) {
+		printk("Size 0x%x is too small\n", size);
+		BUG();
+	}
+	if (vaddr & (size-1)) {
+		printk("Vaddr %lx is not aligned to size 0x%x\n", vaddr, size);
+		BUG();
+	}
+
+	offset = (vaddr - SRMMU_NOCACHE_VADDR) >> SRMMU_NOCACHE_BITMAP_SHIFT;
+	size = size >> SRMMU_NOCACHE_BITMAP_SHIFT;
+
+	bit_map_clear(&srmmu_nocache_map, offset, size);
+}
+
+void srmmu_early_allocate_ptable_skeleton(unsigned long start, unsigned long end);
+
+extern unsigned long probe_memory(void);	/* in fault.c */
+
+/*
+ * Reserve nocache dynamically proportionally to the amount of
+ * system RAM. -- Tomas Szepe <szepe@pinerecords.com>, June 2002
+ */
+void srmmu_nocache_calcsize(void)
+{
+	unsigned long sysmemavail = probe_memory() / 1024;
+	int srmmu_nocache_npages;
+
+	srmmu_nocache_npages =
+		sysmemavail / SRMMU_NOCACHE_ALCRATIO / 1024 * 256;
+
+ /* P3 XXX The 4x overuse: corroborated by /proc/meminfo. */
+	// if (srmmu_nocache_npages < 256) srmmu_nocache_npages = 256;
+	if (srmmu_nocache_npages < SRMMU_MIN_NOCACHE_PAGES)
+		srmmu_nocache_npages = SRMMU_MIN_NOCACHE_PAGES;
+
+	/* anything above 1280 blows up */
+	if (srmmu_nocache_npages > SRMMU_MAX_NOCACHE_PAGES)
+		srmmu_nocache_npages = SRMMU_MAX_NOCACHE_PAGES;
+
+	srmmu_nocache_size = srmmu_nocache_npages * PAGE_SIZE;
+	srmmu_nocache_end = SRMMU_NOCACHE_VADDR + srmmu_nocache_size;
+}
+
+void srmmu_nocache_init(void)
+{
+	unsigned int bitmap_bits;
+	pgd_t *pgd;
+	pmd_t *pmd;
+	pte_t *pte;
+	unsigned long paddr, vaddr;
+	unsigned long pteval;
+
+	bitmap_bits = srmmu_nocache_size >> SRMMU_NOCACHE_BITMAP_SHIFT;
+
+	srmmu_nocache_pool = __alloc_bootmem(srmmu_nocache_size,
+		SRMMU_NOCACHE_ALIGN_MAX, 0UL);
+	memset(srmmu_nocache_pool, 0, srmmu_nocache_size);
+
+	srmmu_nocache_bitmap = __alloc_bootmem(bitmap_bits >> 3, SMP_CACHE_BYTES, 0UL);
+	bit_map_init(&srmmu_nocache_map, srmmu_nocache_bitmap, bitmap_bits);
+
+	srmmu_swapper_pg_dir = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
+	memset(__nocache_fix(srmmu_swapper_pg_dir), 0, SRMMU_PGD_TABLE_SIZE);
+	init_mm.pgd = srmmu_swapper_pg_dir;
+
+	srmmu_early_allocate_ptable_skeleton(SRMMU_NOCACHE_VADDR, srmmu_nocache_end);
+
+	paddr = __pa((unsigned long)srmmu_nocache_pool);
+	vaddr = SRMMU_NOCACHE_VADDR;
+
+	while (vaddr < srmmu_nocache_end) {
+		pgd = pgd_offset_k(vaddr);
+		pmd = srmmu_pmd_offset(__nocache_fix(pgd), vaddr);
+		pte = srmmu_pte_offset(__nocache_fix(pmd), vaddr);
+
+		pteval = ((paddr >> 4) | SRMMU_ET_PTE | SRMMU_PRIV);
+
+		if (srmmu_cache_pagetables)
+			pteval |= SRMMU_CACHE;
+
+		srmmu_set_pte(__nocache_fix(pte), __pte(pteval));
+
+		vaddr += PAGE_SIZE;
+		paddr += PAGE_SIZE;
+	}
+
+	flush_cache_all();
+	flush_tlb_all();
+}
+
+static inline pgd_t *srmmu_get_pgd_fast(void)
+{
+	pgd_t *pgd = NULL;
+
+	pgd = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
+	if (pgd) {
+		pgd_t *init = pgd_offset_k(0);
+		memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
+		memcpy(pgd + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
+						(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+	}
+
+	return pgd;
+}
+
+static void srmmu_free_pgd_fast(pgd_t *pgd)
+{
+	srmmu_free_nocache((unsigned long)pgd, SRMMU_PGD_TABLE_SIZE);
+}
+
+static pmd_t *srmmu_pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	return (pmd_t *)srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+}
+
+static void srmmu_pmd_free(pmd_t * pmd)
+{
+	srmmu_free_nocache((unsigned long)pmd, SRMMU_PMD_TABLE_SIZE);
+}
+
+/*
+ * Hardware needs alignment to 256 only, but we align to whole page size
+ * to reduce fragmentation problems due to the buddy principle.
+ * XXX Provide actual fragmentation statistics in /proc.
+ *
+ * Alignments up to the page size are the same for physical and virtual
+ * addresses of the nocache area.
+ */
+static pte_t *
+srmmu_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+	return (pte_t *)srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
+}
+
+static struct page *
+srmmu_pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	unsigned long pte;
+
+	if ((pte = (unsigned long)srmmu_pte_alloc_one_kernel(mm, address)) == 0)
+		return NULL;
+	return pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
+}
+
+static void srmmu_free_pte_fast(pte_t *pte)
+{
+	srmmu_free_nocache((unsigned long)pte, PTE_SIZE);
+}
+
+static void srmmu_pte_free(struct page *pte)
+{
+	unsigned long p;
+
+	p = (unsigned long)page_address(pte);	/* Cached address (for test) */
+	if (p == 0)
+		BUG();
+	p = page_to_pfn(pte) << PAGE_SHIFT;	/* Physical address */
+	p = (unsigned long) __nocache_va(p);	/* Nocached virtual */
+	srmmu_free_nocache(p, PTE_SIZE);
+}
+
+/*
+ */
+static inline void alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
+{
+	struct ctx_list *ctxp;
+
+	ctxp = ctx_free.next;
+	if(ctxp != &ctx_free) {
+		remove_from_ctx_list(ctxp);
+		add_to_used_ctxlist(ctxp);
+		mm->context = ctxp->ctx_number;
+		ctxp->ctx_mm = mm;
+		return;
+	}
+	ctxp = ctx_used.next;
+	if(ctxp->ctx_mm == old_mm)
+		ctxp = ctxp->next;
+	if(ctxp == &ctx_used)
+		panic("out of mmu contexts");
+	flush_cache_mm(ctxp->ctx_mm);
+	flush_tlb_mm(ctxp->ctx_mm);
+	remove_from_ctx_list(ctxp);
+	add_to_used_ctxlist(ctxp);
+	ctxp->ctx_mm->context = NO_CONTEXT;
+	ctxp->ctx_mm = mm;
+	mm->context = ctxp->ctx_number;
+}
+
+static inline void free_context(int context)
+{
+	struct ctx_list *ctx_old;
+
+	ctx_old = ctx_list_pool + context;
+	remove_from_ctx_list(ctx_old);
+	add_to_free_ctxlist(ctx_old);
+}
+
+
+static void srmmu_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
+    struct task_struct *tsk, int cpu)
+{
+	if(mm->context == NO_CONTEXT) {
+		spin_lock(&srmmu_context_spinlock);
+		alloc_context(old_mm, mm);
+		spin_unlock(&srmmu_context_spinlock);
+		srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
+	}
+
+	if (is_hypersparc)
+		hyper_flush_whole_icache();
+
+	srmmu_set_context(mm->context);
+}
+
+/* Low level IO area allocation on the SRMMU. */
+static inline void srmmu_mapioaddr(unsigned long physaddr,
+    unsigned long virt_addr, int bus_type)
+{
+	pgd_t *pgdp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+	unsigned long tmp;
+
+	physaddr &= PAGE_MASK;
+	pgdp = pgd_offset_k(virt_addr);
+	pmdp = srmmu_pmd_offset(pgdp, virt_addr);
+	ptep = srmmu_pte_offset(pmdp, virt_addr);
+	tmp = (physaddr >> 4) | SRMMU_ET_PTE;
+
+	/*
+	 * I need to test whether this is consistent over all
+	 * sun4m's.  The bus_type represents the upper 4 bits of
+	 * 36-bit physical address on the I/O space lines...
+	 */
+	tmp |= (bus_type << 28);
+	tmp |= SRMMU_PRIV;
+	__flush_page_to_ram(virt_addr);
+	srmmu_set_pte(ptep, __pte(tmp));
+}
+
+static void srmmu_mapiorange(unsigned int bus, unsigned long xpa,
+    unsigned long xva, unsigned int len)
+{
+	while (len != 0) {
+		len -= PAGE_SIZE;
+		srmmu_mapioaddr(xpa, xva, bus);
+		xva += PAGE_SIZE;
+		xpa += PAGE_SIZE;
+	}
+	flush_tlb_all();
+}
+
+static inline void srmmu_unmapioaddr(unsigned long virt_addr)
+{
+	pgd_t *pgdp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+
+	pgdp = pgd_offset_k(virt_addr);
+	pmdp = srmmu_pmd_offset(pgdp, virt_addr);
+	ptep = srmmu_pte_offset(pmdp, virt_addr);
+
+	/* No need to flush uncacheable page. */
+	srmmu_pte_clear(ptep);
+}
+
+static void srmmu_unmapiorange(unsigned long virt_addr, unsigned int len)
+{
+	while (len != 0) {
+		len -= PAGE_SIZE;
+		srmmu_unmapioaddr(virt_addr);
+		virt_addr += PAGE_SIZE;
+	}
+	flush_tlb_all();
+}
+
+/*
+ * On the SRMMU we do not have the problems with limited tlb entries
+ * for mapping kernel pages, so we just take things from the free page
+ * pool.  As a side effect we are putting a little too much pressure
+ * on the gfp() subsystem.  This setup also makes the logic of the
+ * iommu mapping code a lot easier as we can transparently handle
+ * mappings on the kernel stack without any special code as we did
+ * need on the sun4c.
+ */
+struct thread_info *srmmu_alloc_thread_info(void)
+{
+	struct thread_info *ret;
+
+	ret = (struct thread_info *)__get_free_pages(GFP_KERNEL,
+						     THREAD_INFO_ORDER);
+#ifdef CONFIG_DEBUG_STACK_USAGE
+	if (ret)
+		memset(ret, 0, PAGE_SIZE << THREAD_INFO_ORDER);
+#endif /* DEBUG_STACK_USAGE */
+
+	return ret;
+}
+
+static void srmmu_free_thread_info(struct thread_info *ti)
+{
+	free_pages((unsigned long)ti, THREAD_INFO_ORDER);
+}
+
+/* tsunami.S */
+extern void tsunami_flush_cache_all(void);
+extern void tsunami_flush_cache_mm(struct mm_struct *mm);
+extern void tsunami_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void tsunami_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
+extern void tsunami_flush_page_to_ram(unsigned long page);
+extern void tsunami_flush_page_for_dma(unsigned long page);
+extern void tsunami_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
+extern void tsunami_flush_tlb_all(void);
+extern void tsunami_flush_tlb_mm(struct mm_struct *mm);
+extern void tsunami_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void tsunami_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
+extern void tsunami_setup_blockops(void);
+
+/*
+ * Workaround, until we find what's going on with Swift. When low on memory,
+ * it sometimes loops in fault/handle_mm_fault incl. flush_tlb_page to find
+ * out it is already in page tables/ fault again on the same instruction.
+ * I really don't understand it, have checked it and contexts
+ * are right, flush_tlb_all is done as well, and it faults again...
+ * Strange. -jj
+ *
+ * The following code is a deadwood that may be necessary when
+ * we start to make precise page flushes again. --zaitcev
+ */
+static void swift_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
+{
+#if 0
+	static unsigned long last;
+	unsigned int val;
+	/* unsigned int n; */
+
+	if (address == last) {
+		val = srmmu_hwprobe(address);
+		if (val != 0 && pte_val(pte) != val) {
+			printk("swift_update_mmu_cache: "
+			    "addr %lx put %08x probed %08x from %p\n",
+			    address, pte_val(pte), val,
+			    __builtin_return_address(0));
+			srmmu_flush_whole_tlb();
+		}
+	}
+	last = address;
+#endif
+}
+
+/* swift.S */
+extern void swift_flush_cache_all(void);
+extern void swift_flush_cache_mm(struct mm_struct *mm);
+extern void swift_flush_cache_range(struct vm_area_struct *vma,
+				    unsigned long start, unsigned long end);
+extern void swift_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
+extern void swift_flush_page_to_ram(unsigned long page);
+extern void swift_flush_page_for_dma(unsigned long page);
+extern void swift_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
+extern void swift_flush_tlb_all(void);
+extern void swift_flush_tlb_mm(struct mm_struct *mm);
+extern void swift_flush_tlb_range(struct vm_area_struct *vma,
+				  unsigned long start, unsigned long end);
+extern void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
+
+#if 0  /* P3: deadwood to debug precise flushes on Swift. */
+void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	int cctx, ctx1;
+
+	page &= PAGE_MASK;
+	if ((ctx1 = vma->vm_mm->context) != -1) {
+		cctx = srmmu_get_context();
+/* Is context # ever different from current context? P3 */
+		if (cctx != ctx1) {
+			printk("flush ctx %02x curr %02x\n", ctx1, cctx);
+			srmmu_set_context(ctx1);
+			swift_flush_page(page);
+			__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
+					"r" (page), "i" (ASI_M_FLUSH_PROBE));
+			srmmu_set_context(cctx);
+		} else {
+			 /* Rm. prot. bits from virt. c. */
+			/* swift_flush_cache_all(); */
+			/* swift_flush_cache_page(vma, page); */
+			swift_flush_page(page);
+
+			__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
+				"r" (page), "i" (ASI_M_FLUSH_PROBE));
+			/* same as above: srmmu_flush_tlb_page() */
+		}
+	}
+}
+#endif
+
+/*
+ * The following are all MBUS based SRMMU modules, and therefore could
+ * be found in a multiprocessor configuration.  On the whole, these
+ * chips seems to be much more touchy about DVMA and page tables
+ * with respect to cache coherency.
+ */
+
+/* Cypress flushes. */
+static void cypress_flush_cache_all(void)
+{
+	volatile unsigned long cypress_sucks;
+	unsigned long faddr, tagval;
+
+	flush_user_windows();
+	for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
+		__asm__ __volatile__("lda [%1 + %2] %3, %0\n\t" :
+				     "=r" (tagval) :
+				     "r" (faddr), "r" (0x40000),
+				     "i" (ASI_M_DATAC_TAG));
+
+		/* If modified and valid, kick it. */
+		if((tagval & 0x60) == 0x60)
+			cypress_sucks = *(unsigned long *)(0xf0020000 + faddr);
+	}
+}
+
+static void cypress_flush_cache_mm(struct mm_struct *mm)
+{
+	register unsigned long a, b, c, d, e, f, g;
+	unsigned long flags, faddr;
+	int octx;
+
+	FLUSH_BEGIN(mm)
+	flush_user_windows();
+	local_irq_save(flags);
+	octx = srmmu_get_context();
+	srmmu_set_context(mm->context);
+	a = 0x20; b = 0x40; c = 0x60;
+	d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
+
+	faddr = (0x10000 - 0x100);
+	goto inside;
+	do {
+		faddr -= 0x100;
+	inside:
+		__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+				     "sta %%g0, [%0 + %2] %1\n\t"
+				     "sta %%g0, [%0 + %3] %1\n\t"
+				     "sta %%g0, [%0 + %4] %1\n\t"
+				     "sta %%g0, [%0 + %5] %1\n\t"
+				     "sta %%g0, [%0 + %6] %1\n\t"
+				     "sta %%g0, [%0 + %7] %1\n\t"
+				     "sta %%g0, [%0 + %8] %1\n\t" : :
+				     "r" (faddr), "i" (ASI_M_FLUSH_CTX),
+				     "r" (a), "r" (b), "r" (c), "r" (d),
+				     "r" (e), "r" (f), "r" (g));
+	} while(faddr);
+	srmmu_set_context(octx);
+	local_irq_restore(flags);
+	FLUSH_END
+}
+
+static void cypress_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
+{
+	struct mm_struct *mm = vma->vm_mm;
+	register unsigned long a, b, c, d, e, f, g;
+	unsigned long flags, faddr;
+	int octx;
+
+	FLUSH_BEGIN(mm)
+	flush_user_windows();
+	local_irq_save(flags);
+	octx = srmmu_get_context();
+	srmmu_set_context(mm->context);
+	a = 0x20; b = 0x40; c = 0x60;
+	d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
+
+	start &= SRMMU_REAL_PMD_MASK;
+	while(start < end) {
+		faddr = (start + (0x10000 - 0x100));
+		goto inside;
+		do {
+			faddr -= 0x100;
+		inside:
+			__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+					     "sta %%g0, [%0 + %2] %1\n\t"
+					     "sta %%g0, [%0 + %3] %1\n\t"
+					     "sta %%g0, [%0 + %4] %1\n\t"
+					     "sta %%g0, [%0 + %5] %1\n\t"
+					     "sta %%g0, [%0 + %6] %1\n\t"
+					     "sta %%g0, [%0 + %7] %1\n\t"
+					     "sta %%g0, [%0 + %8] %1\n\t" : :
+					     "r" (faddr),
+					     "i" (ASI_M_FLUSH_SEG),
+					     "r" (a), "r" (b), "r" (c), "r" (d),
+					     "r" (e), "r" (f), "r" (g));
+		} while (faddr != start);
+		start += SRMMU_REAL_PMD_SIZE;
+	}
+	srmmu_set_context(octx);
+	local_irq_restore(flags);
+	FLUSH_END
+}
+
+static void cypress_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
+{
+	register unsigned long a, b, c, d, e, f, g;
+	struct mm_struct *mm = vma->vm_mm;
+	unsigned long flags, line;
+	int octx;
+
+	FLUSH_BEGIN(mm)
+	flush_user_windows();
+	local_irq_save(flags);
+	octx = srmmu_get_context();
+	srmmu_set_context(mm->context);
+	a = 0x20; b = 0x40; c = 0x60;
+	d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
+
+	page &= PAGE_MASK;
+	line = (page + PAGE_SIZE) - 0x100;
+	goto inside;
+	do {
+		line -= 0x100;
+	inside:
+			__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+					     "sta %%g0, [%0 + %2] %1\n\t"
+					     "sta %%g0, [%0 + %3] %1\n\t"
+					     "sta %%g0, [%0 + %4] %1\n\t"
+					     "sta %%g0, [%0 + %5] %1\n\t"
+					     "sta %%g0, [%0 + %6] %1\n\t"
+					     "sta %%g0, [%0 + %7] %1\n\t"
+					     "sta %%g0, [%0 + %8] %1\n\t" : :
+					     "r" (line),
+					     "i" (ASI_M_FLUSH_PAGE),
+					     "r" (a), "r" (b), "r" (c), "r" (d),
+					     "r" (e), "r" (f), "r" (g));
+	} while(line != page);
+	srmmu_set_context(octx);
+	local_irq_restore(flags);
+	FLUSH_END
+}
+
+/* Cypress is copy-back, at least that is how we configure it. */
+static void cypress_flush_page_to_ram(unsigned long page)
+{
+	register unsigned long a, b, c, d, e, f, g;
+	unsigned long line;
+
+	a = 0x20; b = 0x40; c = 0x60; d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
+	page &= PAGE_MASK;
+	line = (page + PAGE_SIZE) - 0x100;
+	goto inside;
+	do {
+		line -= 0x100;
+	inside:
+		__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+				     "sta %%g0, [%0 + %2] %1\n\t"
+				     "sta %%g0, [%0 + %3] %1\n\t"
+				     "sta %%g0, [%0 + %4] %1\n\t"
+				     "sta %%g0, [%0 + %5] %1\n\t"
+				     "sta %%g0, [%0 + %6] %1\n\t"
+				     "sta %%g0, [%0 + %7] %1\n\t"
+				     "sta %%g0, [%0 + %8] %1\n\t" : :
+				     "r" (line),
+				     "i" (ASI_M_FLUSH_PAGE),
+				     "r" (a), "r" (b), "r" (c), "r" (d),
+				     "r" (e), "r" (f), "r" (g));
+	} while(line != page);
+}
+
+/* Cypress is also IO cache coherent. */
+static void cypress_flush_page_for_dma(unsigned long page)
+{
+}
+
+/* Cypress has unified L2 VIPT, from which both instructions and data
+ * are stored.  It does not have an onboard icache of any sort, therefore
+ * no flush is necessary.
+ */
+static void cypress_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
+{
+}
+
+static void cypress_flush_tlb_all(void)
+{
+	srmmu_flush_whole_tlb();
+}
+
+static void cypress_flush_tlb_mm(struct mm_struct *mm)
+{
+	FLUSH_BEGIN(mm)
+	__asm__ __volatile__(
+	"lda	[%0] %3, %%g5\n\t"
+	"sta	%2, [%0] %3\n\t"
+	"sta	%%g0, [%1] %4\n\t"
+	"sta	%%g5, [%0] %3\n"
+	: /* no outputs */
+	: "r" (SRMMU_CTX_REG), "r" (0x300), "r" (mm->context),
+	  "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
+	: "g5");
+	FLUSH_END
+}
+
+static void cypress_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
+{
+	struct mm_struct *mm = vma->vm_mm;
+	unsigned long size;
+
+	FLUSH_BEGIN(mm)
+	start &= SRMMU_PGDIR_MASK;
+	size = SRMMU_PGDIR_ALIGN(end) - start;
+	__asm__ __volatile__(
+		"lda	[%0] %5, %%g5\n\t"
+		"sta	%1, [%0] %5\n"
+		"1:\n\t"
+		"subcc	%3, %4, %3\n\t"
+		"bne	1b\n\t"
+		" sta	%%g0, [%2 + %3] %6\n\t"
+		"sta	%%g5, [%0] %5\n"
+	: /* no outputs */
+	: "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (start | 0x200),
+	  "r" (size), "r" (SRMMU_PGDIR_SIZE), "i" (ASI_M_MMUREGS),
+	  "i" (ASI_M_FLUSH_PROBE)
+	: "g5", "cc");
+	FLUSH_END
+}
+
+static void cypress_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	struct mm_struct *mm = vma->vm_mm;
+
+	FLUSH_BEGIN(mm)
+	__asm__ __volatile__(
+	"lda	[%0] %3, %%g5\n\t"
+	"sta	%1, [%0] %3\n\t"
+	"sta	%%g0, [%2] %4\n\t"
+	"sta	%%g5, [%0] %3\n"
+	: /* no outputs */
+	: "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (page & PAGE_MASK),
+	  "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
+	: "g5");
+	FLUSH_END
+}
+
+/* viking.S */
+extern void viking_flush_cache_all(void);
+extern void viking_flush_cache_mm(struct mm_struct *mm);
+extern void viking_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
+				     unsigned long end);
+extern void viking_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
+extern void viking_flush_page_to_ram(unsigned long page);
+extern void viking_flush_page_for_dma(unsigned long page);
+extern void viking_flush_sig_insns(struct mm_struct *mm, unsigned long addr);
+extern void viking_flush_page(unsigned long page);
+extern void viking_mxcc_flush_page(unsigned long page);
+extern void viking_flush_tlb_all(void);
+extern void viking_flush_tlb_mm(struct mm_struct *mm);
+extern void viking_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+				   unsigned long end);
+extern void viking_flush_tlb_page(struct vm_area_struct *vma,
+				  unsigned long page);
+extern void sun4dsmp_flush_tlb_all(void);
+extern void sun4dsmp_flush_tlb_mm(struct mm_struct *mm);
+extern void sun4dsmp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+				   unsigned long end);
+extern void sun4dsmp_flush_tlb_page(struct vm_area_struct *vma,
+				  unsigned long page);
+
+/* hypersparc.S */
+extern void hypersparc_flush_cache_all(void);
+extern void hypersparc_flush_cache_mm(struct mm_struct *mm);
+extern void hypersparc_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void hypersparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
+extern void hypersparc_flush_page_to_ram(unsigned long page);
+extern void hypersparc_flush_page_for_dma(unsigned long page);
+extern void hypersparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
+extern void hypersparc_flush_tlb_all(void);
+extern void hypersparc_flush_tlb_mm(struct mm_struct *mm);
+extern void hypersparc_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void hypersparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
+extern void hypersparc_setup_blockops(void);
+
+/*
+ * NOTE: All of this startup code assumes the low 16mb (approx.) of
+ *       kernel mappings are done with one single contiguous chunk of
+ *       ram.  On small ram machines (classics mainly) we only get
+ *       around 8mb mapped for us.
+ */
+
+void __init early_pgtable_allocfail(char *type)
+{
+	prom_printf("inherit_prom_mappings: Cannot alloc kernel %s.\n", type);
+	prom_halt();
+}
+
+void __init srmmu_early_allocate_ptable_skeleton(unsigned long start, unsigned long end)
+{
+	pgd_t *pgdp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+
+	while(start < end) {
+		pgdp = pgd_offset_k(start);
+		if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
+			pmdp = (pmd_t *) __srmmu_get_nocache(
+			    SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+			if (pmdp == NULL)
+				early_pgtable_allocfail("pmd");
+			memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
+			srmmu_pgd_set(__nocache_fix(pgdp), pmdp);
+		}
+		pmdp = srmmu_pmd_offset(__nocache_fix(pgdp), start);
+		if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
+			ptep = (pte_t *)__srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
+			if (ptep == NULL)
+				early_pgtable_allocfail("pte");
+			memset(__nocache_fix(ptep), 0, PTE_SIZE);
+			srmmu_pmd_set(__nocache_fix(pmdp), ptep);
+		}
+		if (start > (0xffffffffUL - PMD_SIZE))
+			break;
+		start = (start + PMD_SIZE) & PMD_MASK;
+	}
+}
+
+void __init srmmu_allocate_ptable_skeleton(unsigned long start, unsigned long end)
+{
+	pgd_t *pgdp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+
+	while(start < end) {
+		pgdp = pgd_offset_k(start);
+		if(srmmu_pgd_none(*pgdp)) {
+			pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+			if (pmdp == NULL)
+				early_pgtable_allocfail("pmd");
+			memset(pmdp, 0, SRMMU_PMD_TABLE_SIZE);
+			srmmu_pgd_set(pgdp, pmdp);
+		}
+		pmdp = srmmu_pmd_offset(pgdp, start);
+		if(srmmu_pmd_none(*pmdp)) {
+			ptep = (pte_t *) __srmmu_get_nocache(PTE_SIZE,
+							     PTE_SIZE);
+			if (ptep == NULL)
+				early_pgtable_allocfail("pte");
+			memset(ptep, 0, PTE_SIZE);
+			srmmu_pmd_set(pmdp, ptep);
+		}
+		if (start > (0xffffffffUL - PMD_SIZE))
+			break;
+		start = (start + PMD_SIZE) & PMD_MASK;
+	}
+}
+
+/*
+ * This is much cleaner than poking around physical address space
+ * looking at the prom's page table directly which is what most
+ * other OS's do.  Yuck... this is much better.
+ */
+void __init srmmu_inherit_prom_mappings(unsigned long start,unsigned long end)
+{
+	pgd_t *pgdp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+	int what = 0; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
+	unsigned long prompte;
+
+	while(start <= end) {
+		if (start == 0)
+			break; /* probably wrap around */
+		if(start == 0xfef00000)
+			start = KADB_DEBUGGER_BEGVM;
+		if(!(prompte = srmmu_hwprobe(start))) {
+			start += PAGE_SIZE;
+			continue;
+		}
+    
+		/* A red snapper, see what it really is. */
+		what = 0;
+    
+		if(!(start & ~(SRMMU_REAL_PMD_MASK))) {
+			if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_REAL_PMD_SIZE) == prompte)
+				what = 1;
+		}
+    
+		if(!(start & ~(SRMMU_PGDIR_MASK))) {
+			if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_PGDIR_SIZE) ==
+			   prompte)
+				what = 2;
+		}
+    
+		pgdp = pgd_offset_k(start);
+		if(what == 2) {
+			*(pgd_t *)__nocache_fix(pgdp) = __pgd(prompte);
+			start += SRMMU_PGDIR_SIZE;
+			continue;
+		}
+		if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
+			pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+			if (pmdp == NULL)
+				early_pgtable_allocfail("pmd");
+			memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
+			srmmu_pgd_set(__nocache_fix(pgdp), pmdp);
+		}
+		pmdp = srmmu_pmd_offset(__nocache_fix(pgdp), start);
+		if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
+			ptep = (pte_t *) __srmmu_get_nocache(PTE_SIZE,
+							     PTE_SIZE);
+			if (ptep == NULL)
+				early_pgtable_allocfail("pte");
+			memset(__nocache_fix(ptep), 0, PTE_SIZE);
+			srmmu_pmd_set(__nocache_fix(pmdp), ptep);
+		}
+		if(what == 1) {
+			/*
+			 * We bend the rule where all 16 PTPs in a pmd_t point
+			 * inside the same PTE page, and we leak a perfectly
+			 * good hardware PTE piece. Alternatives seem worse.
+			 */
+			unsigned int x;	/* Index of HW PMD in soft cluster */
+			x = (start >> PMD_SHIFT) & 15;
+			*(unsigned long *)__nocache_fix(&pmdp->pmdv[x]) = prompte;
+			start += SRMMU_REAL_PMD_SIZE;
+			continue;
+		}
+		ptep = srmmu_pte_offset(__nocache_fix(pmdp), start);
+		*(pte_t *)__nocache_fix(ptep) = __pte(prompte);
+		start += PAGE_SIZE;
+	}
+}
+
+#define KERNEL_PTE(page_shifted) ((page_shifted)|SRMMU_CACHE|SRMMU_PRIV|SRMMU_VALID)
+
+/* Create a third-level SRMMU 16MB page mapping. */
+static void __init do_large_mapping(unsigned long vaddr, unsigned long phys_base)
+{
+	pgd_t *pgdp = pgd_offset_k(vaddr);
+	unsigned long big_pte;
+
+	big_pte = KERNEL_PTE(phys_base >> 4);
+	*(pgd_t *)__nocache_fix(pgdp) = __pgd(big_pte);
+}
+
+/* Map sp_bank entry SP_ENTRY, starting at virtual address VBASE. */
+static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
+{
+	unsigned long pstart = (sp_banks[sp_entry].base_addr & SRMMU_PGDIR_MASK);
+	unsigned long vstart = (vbase & SRMMU_PGDIR_MASK);
+	unsigned long vend = SRMMU_PGDIR_ALIGN(vbase + sp_banks[sp_entry].num_bytes);
+	/* Map "low" memory only */
+	const unsigned long min_vaddr = PAGE_OFFSET;
+	const unsigned long max_vaddr = PAGE_OFFSET + SRMMU_MAXMEM;
+
+	if (vstart < min_vaddr || vstart >= max_vaddr)
+		return vstart;
+	
+	if (vend > max_vaddr || vend < min_vaddr)
+		vend = max_vaddr;
+
+	while(vstart < vend) {
+		do_large_mapping(vstart, pstart);
+		vstart += SRMMU_PGDIR_SIZE; pstart += SRMMU_PGDIR_SIZE;
+	}
+	return vstart;
+}
+
+static inline void memprobe_error(char *msg)
+{
+	prom_printf(msg);
+	prom_printf("Halting now...\n");
+	prom_halt();
+}
+
+static inline void map_kernel(void)
+{
+	int i;
+
+	if (phys_base > 0) {
+		do_large_mapping(PAGE_OFFSET, phys_base);
+	}
+
+	for (i = 0; sp_banks[i].num_bytes != 0; i++) {
+		map_spbank((unsigned long)__va(sp_banks[i].base_addr), i);
+	}
+
+	BTFIXUPSET_SIMM13(user_ptrs_per_pgd, PAGE_OFFSET / SRMMU_PGDIR_SIZE);
+}
+
+/* Paging initialization on the Sparc Reference MMU. */
+extern void sparc_context_init(int);
+
+void (*poke_srmmu)(void) __initdata = NULL;
+
+extern unsigned long bootmem_init(unsigned long *pages_avail);
+
+void __init srmmu_paging_init(void)
+{
+	int i, cpunode;
+	char node_str[128];
+	pgd_t *pgd;
+	pmd_t *pmd;
+	pte_t *pte;
+	unsigned long pages_avail;
+
+	sparc_iomap.start = SUN4M_IOBASE_VADDR;	/* 16MB of IOSPACE on all sun4m's. */
+
+	if (sparc_cpu_model == sun4d)
+		num_contexts = 65536; /* We know it is Viking */
+	else {
+		/* Find the number of contexts on the srmmu. */
+		cpunode = prom_getchild(prom_root_node);
+		num_contexts = 0;
+		while(cpunode != 0) {
+			prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
+			if(!strcmp(node_str, "cpu")) {
+				num_contexts = prom_getintdefault(cpunode, "mmu-nctx", 0x8);
+				break;
+			}
+			cpunode = prom_getsibling(cpunode);
+		}
+	}
+
+	if(!num_contexts) {
+		prom_printf("Something wrong, can't find cpu node in paging_init.\n");
+		prom_halt();
+	}
+
+	pages_avail = 0;
+	last_valid_pfn = bootmem_init(&pages_avail);
+
+	srmmu_nocache_calcsize();
+	srmmu_nocache_init();
+        srmmu_inherit_prom_mappings(0xfe400000,(LINUX_OPPROM_ENDVM-PAGE_SIZE));
+	map_kernel();
+
+	/* ctx table has to be physically aligned to its size */
+	srmmu_context_table = (ctxd_t *)__srmmu_get_nocache(num_contexts*sizeof(ctxd_t), num_contexts*sizeof(ctxd_t));
+	srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa((unsigned long)srmmu_context_table);
+
+	for(i = 0; i < num_contexts; i++)
+		srmmu_ctxd_set((ctxd_t *)__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);
+
+	flush_cache_all();
+	srmmu_set_ctable_ptr((unsigned long)srmmu_ctx_table_phys);
+	flush_tlb_all();
+	poke_srmmu();
+
+#ifdef CONFIG_SUN_IO
+	srmmu_allocate_ptable_skeleton(sparc_iomap.start, IOBASE_END);
+	srmmu_allocate_ptable_skeleton(DVMA_VADDR, DVMA_END);
+#endif
+
+	srmmu_allocate_ptable_skeleton(
+		__fix_to_virt(__end_of_fixed_addresses - 1), FIXADDR_TOP);
+	srmmu_allocate_ptable_skeleton(PKMAP_BASE, PKMAP_END);
+
+	pgd = pgd_offset_k(PKMAP_BASE);
+	pmd = srmmu_pmd_offset(pgd, PKMAP_BASE);
+	pte = srmmu_pte_offset(pmd, PKMAP_BASE);
+	pkmap_page_table = pte;
+
+	flush_cache_all();
+	flush_tlb_all();
+
+	sparc_context_init(num_contexts);
+
+	kmap_init();
+
+	{
+		unsigned long zones_size[MAX_NR_ZONES];
+		unsigned long zholes_size[MAX_NR_ZONES];
+		unsigned long npages;
+		int znum;
+
+		for (znum = 0; znum < MAX_NR_ZONES; znum++)
+			zones_size[znum] = zholes_size[znum] = 0;
+
+		npages = max_low_pfn - pfn_base;
+
+		zones_size[ZONE_DMA] = npages;
+		zholes_size[ZONE_DMA] = npages - pages_avail;
+
+		npages = highend_pfn - max_low_pfn;
+		zones_size[ZONE_HIGHMEM] = npages;
+		zholes_size[ZONE_HIGHMEM] = npages - calc_highpages();
+
+		free_area_init_node(0, &contig_page_data, zones_size,
+				    pfn_base, zholes_size);
+	}
+}
+
+static void srmmu_mmu_info(struct seq_file *m)
+{
+	seq_printf(m, 
+		   "MMU type\t: %s\n"
+		   "contexts\t: %d\n"
+		   "nocache total\t: %ld\n"
+		   "nocache used\t: %d\n",
+		   srmmu_name,
+		   num_contexts,
+		   srmmu_nocache_size,
+		   srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
+}
+
+static void srmmu_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
+{
+}
+
+static void srmmu_destroy_context(struct mm_struct *mm)
+{
+
+	if(mm->context != NO_CONTEXT) {
+		flush_cache_mm(mm);
+		srmmu_ctxd_set(&srmmu_context_table[mm->context], srmmu_swapper_pg_dir);
+		flush_tlb_mm(mm);
+		spin_lock(&srmmu_context_spinlock);
+		free_context(mm->context);
+		spin_unlock(&srmmu_context_spinlock);
+		mm->context = NO_CONTEXT;
+	}
+}
+
+/* Init various srmmu chip types. */
+static void __init srmmu_is_bad(void)
+{
+	prom_printf("Could not determine SRMMU chip type.\n");
+	prom_halt();
+}
+
+static void __init init_vac_layout(void)
+{
+	int nd, cache_lines;
+	char node_str[128];
+#ifdef CONFIG_SMP
+	int cpu = 0;
+	unsigned long max_size = 0;
+	unsigned long min_line_size = 0x10000000;
+#endif
+
+	nd = prom_getchild(prom_root_node);
+	while((nd = prom_getsibling(nd)) != 0) {
+		prom_getstring(nd, "device_type", node_str, sizeof(node_str));
+		if(!strcmp(node_str, "cpu")) {
+			vac_line_size = prom_getint(nd, "cache-line-size");
+			if (vac_line_size == -1) {
+				prom_printf("can't determine cache-line-size, "
+					    "halting.\n");
+				prom_halt();
+			}
+			cache_lines = prom_getint(nd, "cache-nlines");
+			if (cache_lines == -1) {
+				prom_printf("can't determine cache-nlines, halting.\n");
+				prom_halt();
+			}
+
+			vac_cache_size = cache_lines * vac_line_size;
+#ifdef CONFIG_SMP
+			if(vac_cache_size > max_size)
+				max_size = vac_cache_size;
+			if(vac_line_size < min_line_size)
+				min_line_size = vac_line_size;
+			cpu++;
+			if (cpu >= NR_CPUS || !cpu_online(cpu))
+				break;
+#else
+			break;
+#endif
+		}
+	}
+	if(nd == 0) {
+		prom_printf("No CPU nodes found, halting.\n");
+		prom_halt();
+	}
+#ifdef CONFIG_SMP
+	vac_cache_size = max_size;
+	vac_line_size = min_line_size;
+#endif
+	printk("SRMMU: Using VAC size of %d bytes, line size %d bytes.\n",
+	       (int)vac_cache_size, (int)vac_line_size);
+}
+
+static void __init poke_hypersparc(void)
+{
+	volatile unsigned long clear;
+	unsigned long mreg = srmmu_get_mmureg();
+
+	hyper_flush_unconditional_combined();
+
+	mreg &= ~(HYPERSPARC_CWENABLE);
+	mreg |= (HYPERSPARC_CENABLE | HYPERSPARC_WBENABLE);
+	mreg |= (HYPERSPARC_CMODE);
+
+	srmmu_set_mmureg(mreg);
+
+#if 0 /* XXX I think this is bad news... -DaveM */
+	hyper_clear_all_tags();
+#endif
+
+	put_ross_icr(HYPERSPARC_ICCR_FTD | HYPERSPARC_ICCR_ICE);
+	hyper_flush_whole_icache();
+	clear = srmmu_get_faddr();
+	clear = srmmu_get_fstatus();
+}
+
+static void __init init_hypersparc(void)
+{
+	srmmu_name = "ROSS HyperSparc";
+	srmmu_modtype = HyperSparc;
+
+	init_vac_layout();
+
+	is_hypersparc = 1;
+
+	BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_all, hypersparc_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, hypersparc_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, hypersparc_flush_cache_range, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, hypersparc_flush_cache_page, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(flush_tlb_all, hypersparc_flush_tlb_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_mm, hypersparc_flush_tlb_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_range, hypersparc_flush_tlb_range, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_page, hypersparc_flush_tlb_page, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(__flush_page_to_ram, hypersparc_flush_page_to_ram, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_sig_insns, hypersparc_flush_sig_insns, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_page_for_dma, hypersparc_flush_page_for_dma, BTFIXUPCALL_NOP);
+
+
+	poke_srmmu = poke_hypersparc;
+
+	hypersparc_setup_blockops();
+}
+
+static void __init poke_cypress(void)
+{
+	unsigned long mreg = srmmu_get_mmureg();
+	unsigned long faddr, tagval;
+	volatile unsigned long cypress_sucks;
+	volatile unsigned long clear;
+
+	clear = srmmu_get_faddr();
+	clear = srmmu_get_fstatus();
+
+	if (!(mreg & CYPRESS_CENABLE)) {
+		for(faddr = 0x0; faddr < 0x10000; faddr += 20) {
+			__asm__ __volatile__("sta %%g0, [%0 + %1] %2\n\t"
+					     "sta %%g0, [%0] %2\n\t" : :
+					     "r" (faddr), "r" (0x40000),
+					     "i" (ASI_M_DATAC_TAG));
+		}
+	} else {
+		for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
+			__asm__ __volatile__("lda [%1 + %2] %3, %0\n\t" :
+					     "=r" (tagval) :
+					     "r" (faddr), "r" (0x40000),
+					     "i" (ASI_M_DATAC_TAG));
+
+			/* If modified and valid, kick it. */
+			if((tagval & 0x60) == 0x60)
+				cypress_sucks = *(unsigned long *)
+							(0xf0020000 + faddr);
+		}
+	}
+
+	/* And one more, for our good neighbor, Mr. Broken Cypress. */
+	clear = srmmu_get_faddr();
+	clear = srmmu_get_fstatus();
+
+	mreg |= (CYPRESS_CENABLE | CYPRESS_CMODE);
+	srmmu_set_mmureg(mreg);
+}
+
+static void __init init_cypress_common(void)
+{
+	init_vac_layout();
+
+	BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_all, cypress_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, cypress_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, cypress_flush_cache_range, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, cypress_flush_cache_page, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(flush_tlb_all, cypress_flush_tlb_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_mm, cypress_flush_tlb_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_page, cypress_flush_tlb_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_range, cypress_flush_tlb_range, BTFIXUPCALL_NORM);
+
+
+	BTFIXUPSET_CALL(__flush_page_to_ram, cypress_flush_page_to_ram, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_sig_insns, cypress_flush_sig_insns, BTFIXUPCALL_NOP);
+	BTFIXUPSET_CALL(flush_page_for_dma, cypress_flush_page_for_dma, BTFIXUPCALL_NOP);
+
+	poke_srmmu = poke_cypress;
+}
+
+static void __init init_cypress_604(void)
+{
+	srmmu_name = "ROSS Cypress-604(UP)";
+	srmmu_modtype = Cypress;
+	init_cypress_common();
+}
+
+static void __init init_cypress_605(unsigned long mrev)
+{
+	srmmu_name = "ROSS Cypress-605(MP)";
+	if(mrev == 0xe) {
+		srmmu_modtype = Cypress_vE;
+		hwbug_bitmask |= HWBUG_COPYBACK_BROKEN;
+	} else {
+		if(mrev == 0xd) {
+			srmmu_modtype = Cypress_vD;
+			hwbug_bitmask |= HWBUG_ASIFLUSH_BROKEN;
+		} else {
+			srmmu_modtype = Cypress;
+		}
+	}
+	init_cypress_common();
+}
+
+static void __init poke_swift(void)
+{
+	unsigned long mreg;
+
+	/* Clear any crap from the cache or else... */
+	swift_flush_cache_all();
+
+	/* Enable I & D caches */
+	mreg = srmmu_get_mmureg();
+	mreg |= (SWIFT_IE | SWIFT_DE);
+	/*
+	 * The Swift branch folding logic is completely broken.  At
+	 * trap time, if things are just right, if can mistakenly
+	 * think that a trap is coming from kernel mode when in fact
+	 * it is coming from user mode (it mis-executes the branch in
+	 * the trap code).  So you see things like crashme completely
+	 * hosing your machine which is completely unacceptable.  Turn
+	 * this shit off... nice job Fujitsu.
+	 */
+	mreg &= ~(SWIFT_BF);
+	srmmu_set_mmureg(mreg);
+}
+
+#define SWIFT_MASKID_ADDR  0x10003018
+static void __init init_swift(void)
+{
+	unsigned long swift_rev;
+
+	__asm__ __volatile__("lda [%1] %2, %0\n\t"
+			     "srl %0, 0x18, %0\n\t" :
+			     "=r" (swift_rev) :
+			     "r" (SWIFT_MASKID_ADDR), "i" (ASI_M_BYPASS));
+	srmmu_name = "Fujitsu Swift";
+	switch(swift_rev) {
+	case 0x11:
+	case 0x20:
+	case 0x23:
+	case 0x30:
+		srmmu_modtype = Swift_lots_o_bugs;
+		hwbug_bitmask |= (HWBUG_KERN_ACCBROKEN | HWBUG_KERN_CBITBROKEN);
+		/*
+		 * Gee george, I wonder why Sun is so hush hush about
+		 * this hardware bug... really braindamage stuff going
+		 * on here.  However I think we can find a way to avoid
+		 * all of the workaround overhead under Linux.  Basically,
+		 * any page fault can cause kernel pages to become user
+		 * accessible (the mmu gets confused and clears some of
+		 * the ACC bits in kernel ptes).  Aha, sounds pretty
+		 * horrible eh?  But wait, after extensive testing it appears
+		 * that if you use pgd_t level large kernel pte's (like the
+		 * 4MB pages on the Pentium) the bug does not get tripped
+		 * at all.  This avoids almost all of the major overhead.
+		 * Welcome to a world where your vendor tells you to,
+		 * "apply this kernel patch" instead of "sorry for the
+		 * broken hardware, send it back and we'll give you
+		 * properly functioning parts"
+		 */
+		break;
+	case 0x25:
+	case 0x31:
+		srmmu_modtype = Swift_bad_c;
+		hwbug_bitmask |= HWBUG_KERN_CBITBROKEN;
+		/*
+		 * You see Sun allude to this hardware bug but never
+		 * admit things directly, they'll say things like,
+		 * "the Swift chip cache problems" or similar.
+		 */
+		break;
+	default:
+		srmmu_modtype = Swift_ok;
+		break;
+	};
+
+	BTFIXUPSET_CALL(flush_cache_all, swift_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, swift_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, swift_flush_cache_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, swift_flush_cache_range, BTFIXUPCALL_NORM);
+
+
+	BTFIXUPSET_CALL(flush_tlb_all, swift_flush_tlb_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_mm, swift_flush_tlb_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_page, swift_flush_tlb_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_range, swift_flush_tlb_range, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(__flush_page_to_ram, swift_flush_page_to_ram, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_sig_insns, swift_flush_sig_insns, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_page_for_dma, swift_flush_page_for_dma, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(update_mmu_cache, swift_update_mmu_cache, BTFIXUPCALL_NORM);
+
+	flush_page_for_dma_global = 0;
+
+	/*
+	 * Are you now convinced that the Swift is one of the
+	 * biggest VLSI abortions of all time?  Bravo Fujitsu!
+	 * Fujitsu, the !#?!%$'d up processor people.  I bet if
+	 * you examined the microcode of the Swift you'd find
+	 * XXX's all over the place.
+	 */
+	poke_srmmu = poke_swift;
+}
+
+static void turbosparc_flush_cache_all(void)
+{
+	flush_user_windows();
+	turbosparc_idflash_clear();
+}
+
+static void turbosparc_flush_cache_mm(struct mm_struct *mm)
+{
+	FLUSH_BEGIN(mm)
+	flush_user_windows();
+	turbosparc_idflash_clear();
+	FLUSH_END
+}
+
+static void turbosparc_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
+{
+	FLUSH_BEGIN(vma->vm_mm)
+	flush_user_windows();
+	turbosparc_idflash_clear();
+	FLUSH_END
+}
+
+static void turbosparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
+{
+	FLUSH_BEGIN(vma->vm_mm)
+	flush_user_windows();
+	if (vma->vm_flags & VM_EXEC)
+		turbosparc_flush_icache();
+	turbosparc_flush_dcache();
+	FLUSH_END
+}
+
+/* TurboSparc is copy-back, if we turn it on, but this does not work. */
+static void turbosparc_flush_page_to_ram(unsigned long page)
+{
+#ifdef TURBOSPARC_WRITEBACK
+	volatile unsigned long clear;
+
+	if (srmmu_hwprobe(page))
+		turbosparc_flush_page_cache(page);
+	clear = srmmu_get_fstatus();
+#endif
+}
+
+static void turbosparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
+{
+}
+
+static void turbosparc_flush_page_for_dma(unsigned long page)
+{
+	turbosparc_flush_dcache();
+}
+
+static void turbosparc_flush_tlb_all(void)
+{
+	srmmu_flush_whole_tlb();
+}
+
+static void turbosparc_flush_tlb_mm(struct mm_struct *mm)
+{
+	FLUSH_BEGIN(mm)
+	srmmu_flush_whole_tlb();
+	FLUSH_END
+}
+
+static void turbosparc_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
+{
+	FLUSH_BEGIN(vma->vm_mm)
+	srmmu_flush_whole_tlb();
+	FLUSH_END
+}
+
+static void turbosparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	FLUSH_BEGIN(vma->vm_mm)
+	srmmu_flush_whole_tlb();
+	FLUSH_END
+}
+
+
+static void __init poke_turbosparc(void)
+{
+	unsigned long mreg = srmmu_get_mmureg();
+	unsigned long ccreg;
+
+	/* Clear any crap from the cache or else... */
+	turbosparc_flush_cache_all();
+	mreg &= ~(TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* Temporarily disable I & D caches */
+	mreg &= ~(TURBOSPARC_PCENABLE);		/* Don't check parity */
+	srmmu_set_mmureg(mreg);
+	
+	ccreg = turbosparc_get_ccreg();
+
+#ifdef TURBOSPARC_WRITEBACK
+	ccreg |= (TURBOSPARC_SNENABLE);		/* Do DVMA snooping in Dcache */
+	ccreg &= ~(TURBOSPARC_uS2 | TURBOSPARC_WTENABLE);
+			/* Write-back D-cache, emulate VLSI
+			 * abortion number three, not number one */
+#else
+	/* For now let's play safe, optimize later */
+	ccreg |= (TURBOSPARC_SNENABLE | TURBOSPARC_WTENABLE);
+			/* Do DVMA snooping in Dcache, Write-thru D-cache */
+	ccreg &= ~(TURBOSPARC_uS2);
+			/* Emulate VLSI abortion number three, not number one */
+#endif
+
+	switch (ccreg & 7) {
+	case 0: /* No SE cache */
+	case 7: /* Test mode */
+		break;
+	default:
+		ccreg |= (TURBOSPARC_SCENABLE);
+	}
+	turbosparc_set_ccreg (ccreg);
+
+	mreg |= (TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* I & D caches on */
+	mreg |= (TURBOSPARC_ICSNOOP);		/* Icache snooping on */
+	srmmu_set_mmureg(mreg);
+}
+
+static void __init init_turbosparc(void)
+{
+	srmmu_name = "Fujitsu TurboSparc";
+	srmmu_modtype = TurboSparc;
+
+	BTFIXUPSET_CALL(flush_cache_all, turbosparc_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, turbosparc_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, turbosparc_flush_cache_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, turbosparc_flush_cache_range, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(flush_tlb_all, turbosparc_flush_tlb_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_mm, turbosparc_flush_tlb_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_page, turbosparc_flush_tlb_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_range, turbosparc_flush_tlb_range, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(__flush_page_to_ram, turbosparc_flush_page_to_ram, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(flush_sig_insns, turbosparc_flush_sig_insns, BTFIXUPCALL_NOP);
+	BTFIXUPSET_CALL(flush_page_for_dma, turbosparc_flush_page_for_dma, BTFIXUPCALL_NORM);
+
+	poke_srmmu = poke_turbosparc;
+}
+
+static void __init poke_tsunami(void)
+{
+	unsigned long mreg = srmmu_get_mmureg();
+
+	tsunami_flush_icache();
+	tsunami_flush_dcache();
+	mreg &= ~TSUNAMI_ITD;
+	mreg |= (TSUNAMI_IENAB | TSUNAMI_DENAB);
+	srmmu_set_mmureg(mreg);
+}
+
+static void __init init_tsunami(void)
+{
+	/*
+	 * Tsunami's pretty sane, Sun and TI actually got it
+	 * somewhat right this time.  Fujitsu should have
+	 * taken some lessons from them.
+	 */
+
+	srmmu_name = "TI Tsunami";
+	srmmu_modtype = Tsunami;
+
+	BTFIXUPSET_CALL(flush_cache_all, tsunami_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, tsunami_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, tsunami_flush_cache_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, tsunami_flush_cache_range, BTFIXUPCALL_NORM);
+
+
+	BTFIXUPSET_CALL(flush_tlb_all, tsunami_flush_tlb_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_mm, tsunami_flush_tlb_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_page, tsunami_flush_tlb_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_tlb_range, tsunami_flush_tlb_range, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(__flush_page_to_ram, tsunami_flush_page_to_ram, BTFIXUPCALL_NOP);
+	BTFIXUPSET_CALL(flush_sig_insns, tsunami_flush_sig_insns, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_page_for_dma, tsunami_flush_page_for_dma, BTFIXUPCALL_NORM);
+
+	poke_srmmu = poke_tsunami;
+
+	tsunami_setup_blockops();
+}
+
+static void __init poke_viking(void)
+{
+	unsigned long mreg = srmmu_get_mmureg();
+	static int smp_catch;
+
+	if(viking_mxcc_present) {
+		unsigned long mxcc_control = mxcc_get_creg();
+
+		mxcc_control |= (MXCC_CTL_ECE | MXCC_CTL_PRE | MXCC_CTL_MCE);
+		mxcc_control &= ~(MXCC_CTL_RRC);
+		mxcc_set_creg(mxcc_control);
+
+		/*
+		 * We don't need memory parity checks.
+		 * XXX This is a mess, have to dig out later. ecd.
+		viking_mxcc_turn_off_parity(&mreg, &mxcc_control);
+		 */
+
+		/* We do cache ptables on MXCC. */
+		mreg |= VIKING_TCENABLE;
+	} else {
+		unsigned long bpreg;
+
+		mreg &= ~(VIKING_TCENABLE);
+		if(smp_catch++) {
+			/* Must disable mixed-cmd mode here for other cpu's. */
+			bpreg = viking_get_bpreg();
+			bpreg &= ~(VIKING_ACTION_MIX);
+			viking_set_bpreg(bpreg);
+
+			/* Just in case PROM does something funny. */
+			msi_set_sync();
+		}
+	}
+
+	mreg |= VIKING_SPENABLE;
+	mreg |= (VIKING_ICENABLE | VIKING_DCENABLE);
+	mreg |= VIKING_SBENABLE;
+	mreg &= ~(VIKING_ACENABLE);
+	srmmu_set_mmureg(mreg);
+
+#ifdef CONFIG_SMP
+	/* Avoid unnecessary cross calls. */
+	BTFIXUPCOPY_CALL(flush_cache_all, local_flush_cache_all);
+	BTFIXUPCOPY_CALL(flush_cache_mm, local_flush_cache_mm);
+	BTFIXUPCOPY_CALL(flush_cache_range, local_flush_cache_range);
+	BTFIXUPCOPY_CALL(flush_cache_page, local_flush_cache_page);
+	BTFIXUPCOPY_CALL(__flush_page_to_ram, local_flush_page_to_ram);
+	BTFIXUPCOPY_CALL(flush_sig_insns, local_flush_sig_insns);
+	BTFIXUPCOPY_CALL(flush_page_for_dma, local_flush_page_for_dma);
+	btfixup();
+#endif
+}
+
+static void __init init_viking(void)
+{
+	unsigned long mreg = srmmu_get_mmureg();
+
+	/* Ahhh, the viking.  SRMMU VLSI abortion number two... */
+	if(mreg & VIKING_MMODE) {
+		srmmu_name = "TI Viking";
+		viking_mxcc_present = 0;
+		msi_set_sync();
+
+		BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
+
+		/*
+		 * We need this to make sure old viking takes no hits
+		 * on it's cache for dma snoops to workaround the
+		 * "load from non-cacheable memory" interrupt bug.
+		 * This is only necessary because of the new way in
+		 * which we use the IOMMU.
+		 */
+		BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page, BTFIXUPCALL_NORM);
+
+		flush_page_for_dma_global = 0;
+	} else {
+		srmmu_name = "TI Viking/MXCC";
+		viking_mxcc_present = 1;
+
+		srmmu_cache_pagetables = 1;
+
+		/* MXCC vikings lack the DMA snooping bug. */
+		BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page_for_dma, BTFIXUPCALL_NOP);
+	}
+
+	BTFIXUPSET_CALL(flush_cache_all, viking_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, viking_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, viking_flush_cache_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, viking_flush_cache_range, BTFIXUPCALL_NORM);
+
+#ifdef CONFIG_SMP
+	if (sparc_cpu_model == sun4d) {
+		BTFIXUPSET_CALL(flush_tlb_all, sun4dsmp_flush_tlb_all, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_mm, sun4dsmp_flush_tlb_mm, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_page, sun4dsmp_flush_tlb_page, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_range, sun4dsmp_flush_tlb_range, BTFIXUPCALL_NORM);
+	} else
+#endif
+	{
+		BTFIXUPSET_CALL(flush_tlb_all, viking_flush_tlb_all, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_mm, viking_flush_tlb_mm, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_page, viking_flush_tlb_page, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_range, viking_flush_tlb_range, BTFIXUPCALL_NORM);
+	}
+
+	BTFIXUPSET_CALL(__flush_page_to_ram, viking_flush_page_to_ram, BTFIXUPCALL_NOP);
+	BTFIXUPSET_CALL(flush_sig_insns, viking_flush_sig_insns, BTFIXUPCALL_NOP);
+
+	poke_srmmu = poke_viking;
+}
+
+/* Probe for the srmmu chip version. */
+static void __init get_srmmu_type(void)
+{
+	unsigned long mreg, psr;
+	unsigned long mod_typ, mod_rev, psr_typ, psr_vers;
+
+	srmmu_modtype = SRMMU_INVAL_MOD;
+	hwbug_bitmask = 0;
+
+	mreg = srmmu_get_mmureg(); psr = get_psr();
+	mod_typ = (mreg & 0xf0000000) >> 28;
+	mod_rev = (mreg & 0x0f000000) >> 24;
+	psr_typ = (psr >> 28) & 0xf;
+	psr_vers = (psr >> 24) & 0xf;
+
+	/* First, check for HyperSparc or Cypress. */
+	if(mod_typ == 1) {
+		switch(mod_rev) {
+		case 7:
+			/* UP or MP Hypersparc */
+			init_hypersparc();
+			break;
+		case 0:
+		case 2:
+			/* Uniprocessor Cypress */
+			init_cypress_604();
+			break;
+		case 10:
+		case 11:
+		case 12:
+			/* _REALLY OLD_ Cypress MP chips... */
+		case 13:
+		case 14:
+		case 15:
+			/* MP Cypress mmu/cache-controller */
+			init_cypress_605(mod_rev);
+			break;
+		default:
+			/* Some other Cypress revision, assume a 605. */
+			init_cypress_605(mod_rev);
+			break;
+		};
+		return;
+	}
+	
+	/*
+	 * Now Fujitsu TurboSparc. It might happen that it is
+	 * in Swift emulation mode, so we will check later...
+	 */
+	if (psr_typ == 0 && psr_vers == 5) {
+		init_turbosparc();
+		return;
+	}
+
+	/* Next check for Fujitsu Swift. */
+	if(psr_typ == 0 && psr_vers == 4) {
+		int cpunode;
+		char node_str[128];
+
+		/* Look if it is not a TurboSparc emulating Swift... */
+		cpunode = prom_getchild(prom_root_node);
+		while((cpunode = prom_getsibling(cpunode)) != 0) {
+			prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
+			if(!strcmp(node_str, "cpu")) {
+				if (!prom_getintdefault(cpunode, "psr-implementation", 1) &&
+				    prom_getintdefault(cpunode, "psr-version", 1) == 5) {
+					init_turbosparc();
+					return;
+				}
+				break;
+			}
+		}
+		
+		init_swift();
+		return;
+	}
+
+	/* Now the Viking family of srmmu. */
+	if(psr_typ == 4 &&
+	   ((psr_vers == 0) ||
+	    ((psr_vers == 1) && (mod_typ == 0) && (mod_rev == 0)))) {
+		init_viking();
+		return;
+	}
+
+	/* Finally the Tsunami. */
+	if(psr_typ == 4 && psr_vers == 1 && (mod_typ || mod_rev)) {
+		init_tsunami();
+		return;
+	}
+
+	/* Oh well */
+	srmmu_is_bad();
+}
+
+/* don't laugh, static pagetables */
+static void srmmu_check_pgt_cache(int low, int high)
+{
+}
+
+extern unsigned long spwin_mmu_patchme, fwin_mmu_patchme,
+	tsetup_mmu_patchme, rtrap_mmu_patchme;
+
+extern unsigned long spwin_srmmu_stackchk, srmmu_fwin_stackchk,
+	tsetup_srmmu_stackchk, srmmu_rett_stackchk;
+
+extern unsigned long srmmu_fault;
+
+#define PATCH_BRANCH(insn, dest) do { \
+		iaddr = &(insn); \
+		daddr = &(dest); \
+		*iaddr = SPARC_BRANCH((unsigned long) daddr, (unsigned long) iaddr); \
+	} while(0)
+
+static void __init patch_window_trap_handlers(void)
+{
+	unsigned long *iaddr, *daddr;
+	
+	PATCH_BRANCH(spwin_mmu_patchme, spwin_srmmu_stackchk);
+	PATCH_BRANCH(fwin_mmu_patchme, srmmu_fwin_stackchk);
+	PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk);
+	PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk);
+	PATCH_BRANCH(sparc_ttable[SP_TRAP_TFLT].inst_three, srmmu_fault);
+	PATCH_BRANCH(sparc_ttable[SP_TRAP_DFLT].inst_three, srmmu_fault);
+	PATCH_BRANCH(sparc_ttable[SP_TRAP_DACC].inst_three, srmmu_fault);
+}
+
+#ifdef CONFIG_SMP
+/* Local cross-calls. */
+static void smp_flush_page_for_dma(unsigned long page)
+{
+	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_for_dma), page);
+	local_flush_page_for_dma(page);
+}
+
+#endif
+
+static pte_t srmmu_pgoff_to_pte(unsigned long pgoff)
+{
+	return __pte((pgoff << SRMMU_PTE_FILE_SHIFT) | SRMMU_FILE);
+}
+
+static unsigned long srmmu_pte_to_pgoff(pte_t pte)
+{
+	return pte_val(pte) >> SRMMU_PTE_FILE_SHIFT;
+}
+
+/* Load up routines and constants for sun4m and sun4d mmu */
+void __init ld_mmu_srmmu(void)
+{
+	extern void ld_mmu_iommu(void);
+	extern void ld_mmu_iounit(void);
+	extern void ___xchg32_sun4md(void);
+
+	BTFIXUPSET_SIMM13(pgdir_shift, SRMMU_PGDIR_SHIFT);
+	BTFIXUPSET_SETHI(pgdir_size, SRMMU_PGDIR_SIZE);
+	BTFIXUPSET_SETHI(pgdir_mask, SRMMU_PGDIR_MASK);
+
+	BTFIXUPSET_SIMM13(ptrs_per_pmd, SRMMU_PTRS_PER_PMD);
+	BTFIXUPSET_SIMM13(ptrs_per_pgd, SRMMU_PTRS_PER_PGD);
+
+	BTFIXUPSET_INT(page_none, pgprot_val(SRMMU_PAGE_NONE));
+	BTFIXUPSET_INT(page_shared, pgprot_val(SRMMU_PAGE_SHARED));
+	BTFIXUPSET_INT(page_copy, pgprot_val(SRMMU_PAGE_COPY));
+	BTFIXUPSET_INT(page_readonly, pgprot_val(SRMMU_PAGE_RDONLY));
+	BTFIXUPSET_INT(page_kernel, pgprot_val(SRMMU_PAGE_KERNEL));
+	page_kernel = pgprot_val(SRMMU_PAGE_KERNEL);
+	pg_iobits = SRMMU_VALID | SRMMU_WRITE | SRMMU_REF;
+
+	/* Functions */
+#ifndef CONFIG_SMP	
+	BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4md, BTFIXUPCALL_SWAPG1G2);
+#endif
+	BTFIXUPSET_CALL(do_check_pgt_cache, srmmu_check_pgt_cache, BTFIXUPCALL_NOP);
+
+	BTFIXUPSET_CALL(set_pte, srmmu_set_pte, BTFIXUPCALL_SWAPO0O1);
+	BTFIXUPSET_CALL(switch_mm, srmmu_switch_mm, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(pte_pfn, srmmu_pte_pfn, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_page, srmmu_pmd_page, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_page, srmmu_pgd_page, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_SETHI(none_mask, 0xF0000000);
+
+	BTFIXUPSET_CALL(pte_present, srmmu_pte_present, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_SWAPO0G0);
+	BTFIXUPSET_CALL(pte_read, srmmu_pte_read, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(pmd_bad, srmmu_pmd_bad, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_present, srmmu_pmd_present, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_SWAPO0G0);
+
+	BTFIXUPSET_CALL(pgd_none, srmmu_pgd_none, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_bad, srmmu_pgd_bad, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_present, srmmu_pgd_present, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_SWAPO0G0);
+
+	BTFIXUPSET_CALL(mk_pte, srmmu_mk_pte, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(mk_pte_phys, srmmu_mk_pte_phys, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(mk_pte_io, srmmu_mk_pte_io, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgd_set, srmmu_pgd_set, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_set, srmmu_pmd_set, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_populate, srmmu_pmd_populate, BTFIXUPCALL_NORM);
+	
+	BTFIXUPSET_INT(pte_modify_mask, SRMMU_CHG_MASK);
+	BTFIXUPSET_CALL(pmd_offset, srmmu_pmd_offset, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pte_offset_kernel, srmmu_pte_offset, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(free_pte_fast, srmmu_free_pte_fast, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pte_free, srmmu_pte_free, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pte_alloc_one_kernel, srmmu_pte_alloc_one_kernel, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pte_alloc_one, srmmu_pte_alloc_one, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(free_pmd_fast, srmmu_pmd_free, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pmd_alloc_one, srmmu_pmd_alloc_one, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(free_pgd_fast, srmmu_free_pgd_fast, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(get_pgd_fast, srmmu_get_pgd_fast, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_HALF(pte_writei, SRMMU_WRITE);
+	BTFIXUPSET_HALF(pte_dirtyi, SRMMU_DIRTY);
+	BTFIXUPSET_HALF(pte_youngi, SRMMU_REF);
+	BTFIXUPSET_HALF(pte_filei, SRMMU_FILE);
+	BTFIXUPSET_HALF(pte_wrprotecti, SRMMU_WRITE);
+	BTFIXUPSET_HALF(pte_mkcleani, SRMMU_DIRTY);
+	BTFIXUPSET_HALF(pte_mkoldi, SRMMU_REF);
+	BTFIXUPSET_CALL(pte_mkwrite, srmmu_pte_mkwrite, BTFIXUPCALL_ORINT(SRMMU_WRITE));
+	BTFIXUPSET_CALL(pte_mkdirty, srmmu_pte_mkdirty, BTFIXUPCALL_ORINT(SRMMU_DIRTY));
+	BTFIXUPSET_CALL(pte_mkyoung, srmmu_pte_mkyoung, BTFIXUPCALL_ORINT(SRMMU_REF));
+	BTFIXUPSET_CALL(update_mmu_cache, srmmu_update_mmu_cache, BTFIXUPCALL_NOP);
+	BTFIXUPSET_CALL(destroy_context, srmmu_destroy_context, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(sparc_mapiorange, srmmu_mapiorange, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(sparc_unmapiorange, srmmu_unmapiorange, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(__swp_type, srmmu_swp_type, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(__swp_offset, srmmu_swp_offset, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(__swp_entry, srmmu_swp_entry, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(mmu_info, srmmu_mmu_info, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(alloc_thread_info, srmmu_alloc_thread_info, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(free_thread_info, srmmu_free_thread_info, BTFIXUPCALL_NORM);
+
+	BTFIXUPSET_CALL(pte_to_pgoff, srmmu_pte_to_pgoff, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(pgoff_to_pte, srmmu_pgoff_to_pte, BTFIXUPCALL_NORM);
+
+	get_srmmu_type();
+	patch_window_trap_handlers();
+
+#ifdef CONFIG_SMP
+	/* El switcheroo... */
+
+	BTFIXUPCOPY_CALL(local_flush_cache_all, flush_cache_all);
+	BTFIXUPCOPY_CALL(local_flush_cache_mm, flush_cache_mm);
+	BTFIXUPCOPY_CALL(local_flush_cache_range, flush_cache_range);
+	BTFIXUPCOPY_CALL(local_flush_cache_page, flush_cache_page);
+	BTFIXUPCOPY_CALL(local_flush_tlb_all, flush_tlb_all);
+	BTFIXUPCOPY_CALL(local_flush_tlb_mm, flush_tlb_mm);
+	BTFIXUPCOPY_CALL(local_flush_tlb_range, flush_tlb_range);
+	BTFIXUPCOPY_CALL(local_flush_tlb_page, flush_tlb_page);
+	BTFIXUPCOPY_CALL(local_flush_page_to_ram, __flush_page_to_ram);
+	BTFIXUPCOPY_CALL(local_flush_sig_insns, flush_sig_insns);
+	BTFIXUPCOPY_CALL(local_flush_page_for_dma, flush_page_for_dma);
+
+	BTFIXUPSET_CALL(flush_cache_all, smp_flush_cache_all, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM);
+	if (sparc_cpu_model != sun4d) {
+		BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM);
+		BTFIXUPSET_CALL(flush_tlb_page, smp_flush_tlb_page, BTFIXUPCALL_NORM);
+	}
+	BTFIXUPSET_CALL(__flush_page_to_ram, smp_flush_page_to_ram, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_sig_insns, smp_flush_sig_insns, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(flush_page_for_dma, smp_flush_page_for_dma, BTFIXUPCALL_NORM);
+#endif
+
+	if (sparc_cpu_model == sun4d)
+		ld_mmu_iounit();
+	else
+		ld_mmu_iommu();
+#ifdef CONFIG_SMP
+	if (sparc_cpu_model == sun4d)
+		sun4d_init_smp();
+	else
+		sun4m_init_smp();
+#endif
+}