X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc64%2Fmm%2Finit.c;h=5391cd5c830c78b569fc9f6e5d9e7d2c0c6ba314;hb=a2f44b27303a5353859d77a3e96a1d3f33f56ab7;hp=7d8d7621e1ce9296c989c24d77b9ef64c2327835;hpb=134734d875a0a48d994ef20b9905209b4b8b6f75;p=linux-2.6.git

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 7d8d7621e..5391cd5c8 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -5,7 +5,7 @@
  *  Copyright (C) 1997-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  */
  
-#include <linux/config.h>
+#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/string.h>
@@ -17,6 +17,7 @@
 #include <linux/initrd.h>
 #include <linux/swap.h>
 #include <linux/pagemap.h>
+#include <linux/poison.h>
 #include <linux/fs.h>
 #include <linux/seq_file.h>
 #include <linux/kprobes.h>
@@ -39,9 +40,30 @@
 #include <asm/tlb.h>
 #include <asm/spitfire.h>
 #include <asm/sections.h>
+#include <asm/tsb.h>
+#include <asm/hypervisor.h>
+#include <asm/prom.h>
 
 extern void device_scan(void);
 
+#define MAX_PHYS_ADDRESS	(1UL << 42UL)
+#define KPTE_BITMAP_CHUNK_SZ	(256UL * 1024UL * 1024UL)
+#define KPTE_BITMAP_BYTES	\
+	((MAX_PHYS_ADDRESS / KPTE_BITMAP_CHUNK_SZ) / 8)
+
+unsigned long kern_linear_pte_xor[2] __read_mostly;
+
+/* A bitmap, one bit for every 256MB of physical memory.  If the bit
+ * is clear, we should use a 4MB page (via kern_linear_pte_xor[0]) else
+ * if set we should use a 256MB page (via kern_linear_pte_xor[1]).
+ */
+unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)];
+
+#ifndef CONFIG_DEBUG_PAGEALLOC
+/* A special kernel TSB for 4MB and 256MB linear mappings.  */
+struct tsb swapper_4m_tsb[KERNEL_TSB4M_NENTRIES];
+#endif
+
 #define MAX_BANKS	32
 
 static struct linux_prom64_registers pavail[MAX_BANKS] __initdata;
@@ -82,8 +104,6 @@ static void __init read_obp_memory(const char *property,
 		prom_halt();
 	}
 
-	*num_ents = ents;
-
 	/* Sanitize what we got from the firmware, by page aligning
 	 * everything.
 	 */
@@ -105,17 +125,34 @@ static void __init read_obp_memory(const char *property,
 		regs[i].phys_addr = base;
 		regs[i].reg_size = size;
 	}
+
+	for (i = 0; i < ents; i++) {
+		if (regs[i].reg_size == 0UL) {
+			int j;
+
+			for (j = i; j < ents - 1; j++) {
+				regs[j].phys_addr =
+					regs[j+1].phys_addr;
+				regs[j].reg_size =
+					regs[j+1].reg_size;
+			}
+
+			ents--;
+			i--;
+		}
+	}
+
+	*num_ents = ents;
+
 	sort(regs, ents, sizeof(struct linux_prom64_registers),
 	     cmp_p64, NULL);
 }
 
 unsigned long *sparc64_valid_addr_bitmap __read_mostly;
 
-/* Ugly, but necessary... -DaveM */
-unsigned long phys_base __read_mostly;
+/* Kernel physical address base and size in bytes.  */
 unsigned long kern_base __read_mostly;
 unsigned long kern_size __read_mostly;
-unsigned long pfn_base __read_mostly;
 
 /* get_new_mmu_context() uses "cache + 1".  */
 DEFINE_SPINLOCK(ctx_alloc_lock);
@@ -141,24 +178,28 @@ unsigned long sparc64_kern_sec_context __read_mostly;
 
 int bigkernel = 0;
 
-/* XXX Tune this... */
-#define PGT_CACHE_LOW	25
-#define PGT_CACHE_HIGH	50
+struct kmem_cache *pgtable_cache __read_mostly;
+
+static void zero_ctor(void *addr, struct kmem_cache *cache, unsigned long flags)
+{
+	clear_page(addr);
+}
+
+extern void tsb_cache_init(void);
 
-void check_pgt_cache(void)
+void pgtable_cache_init(void)
 {
-	preempt_disable();
-	if (pgtable_cache_size > PGT_CACHE_HIGH) {
-		do {
-			if (pgd_quicklist)
-				free_pgd_slow(get_pgd_fast());
-			if (pte_quicklist[0])
-				free_pte_slow(pte_alloc_one_fast(NULL, 0));
-			if (pte_quicklist[1])
-				free_pte_slow(pte_alloc_one_fast(NULL, 1 << (PAGE_SHIFT + 10)));
-		} while (pgtable_cache_size > PGT_CACHE_LOW);
+	pgtable_cache = kmem_cache_create("pgtable_cache",
+					  PAGE_SIZE, PAGE_SIZE,
+					  SLAB_HWCACHE_ALIGN |
+					  SLAB_MUST_HWCACHE_ALIGN,
+					  zero_ctor,
+					  NULL);
+	if (!pgtable_cache) {
+		prom_printf("Could not create pgtable_cache\n");
+		prom_halt();
 	}
-	preempt_enable();
+	tsb_cache_init();
 }
 
 #ifdef CONFIG_DEBUG_DCFLUSH
@@ -168,8 +209,9 @@ atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0);
 #endif
 #endif
 
-__inline__ void flush_dcache_page_impl(struct page *page)
+inline void flush_dcache_page_impl(struct page *page)
 {
+	BUG_ON(tlb_type == hypervisor);
 #ifdef CONFIG_DEBUG_DCFLUSH
 	atomic_inc(&dcpage_flushes);
 #endif
@@ -186,8 +228,8 @@ __inline__ void flush_dcache_page_impl(struct page *page)
 }
 
 #define PG_dcache_dirty		PG_arch_1
-#define PG_dcache_cpu_shift	24
-#define PG_dcache_cpu_mask	(256 - 1)
+#define PG_dcache_cpu_shift	24UL
+#define PG_dcache_cpu_mask	(256UL - 1UL)
 
 #if NR_CPUS > 256
 #error D-cache dirty tracking and thread_info->cpu need fixing for > 256 cpus
@@ -243,32 +285,78 @@ static __inline__ void clear_dcache_dirty_cpu(struct page *page, unsigned long c
 			     : "g1", "g7");
 }
 
+static inline void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long pte)
+{
+	unsigned long tsb_addr = (unsigned long) ent;
+
+	if (tlb_type == cheetah_plus || tlb_type == hypervisor)
+		tsb_addr = __pa(tsb_addr);
+
+	__tsb_insert(tsb_addr, tag, pte);
+}
+
+unsigned long _PAGE_ALL_SZ_BITS __read_mostly;
+unsigned long _PAGE_SZBITS __read_mostly;
+
 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte)
 {
-	struct page *page;
-	unsigned long pfn;
-	unsigned long pg_flags;
-
-	pfn = pte_pfn(pte);
-	if (pfn_valid(pfn) &&
-	    (page = pfn_to_page(pfn), page_mapping(page)) &&
-	    ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) {
-		int cpu = ((pg_flags >> PG_dcache_cpu_shift) &
-			   PG_dcache_cpu_mask);
-		int this_cpu = get_cpu();
-
-		/* This is just to optimize away some function calls
-		 * in the SMP case.
-		 */
-		if (cpu == this_cpu)
-			flush_dcache_page_impl(page);
-		else
-			smp_flush_dcache_page_impl(page, cpu);
+	struct mm_struct *mm;
+	struct tsb *tsb;
+	unsigned long tag, flags;
+	unsigned long tsb_index, tsb_hash_shift;
+
+	if (tlb_type != hypervisor) {
+		unsigned long pfn = pte_pfn(pte);
+		unsigned long pg_flags;
+		struct page *page;
+
+		if (pfn_valid(pfn) &&
+		    (page = pfn_to_page(pfn), page_mapping(page)) &&
+		    ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) {
+			int cpu = ((pg_flags >> PG_dcache_cpu_shift) &
+				   PG_dcache_cpu_mask);
+			int this_cpu = get_cpu();
+
+			/* This is just to optimize away some function calls
+			 * in the SMP case.
+			 */
+			if (cpu == this_cpu)
+				flush_dcache_page_impl(page);
+			else
+				smp_flush_dcache_page_impl(page, cpu);
 
-		clear_dcache_dirty_cpu(page, cpu);
+			clear_dcache_dirty_cpu(page, cpu);
 
-		put_cpu();
+			put_cpu();
+		}
+	}
+
+	mm = vma->vm_mm;
+
+	tsb_index = MM_TSB_BASE;
+	tsb_hash_shift = PAGE_SHIFT;
+
+	spin_lock_irqsave(&mm->context.lock, flags);
+
+#ifdef CONFIG_HUGETLB_PAGE
+	if (mm->context.tsb_block[MM_TSB_HUGE].tsb != NULL) {
+		if ((tlb_type == hypervisor &&
+		     (pte_val(pte) & _PAGE_SZALL_4V) == _PAGE_SZHUGE_4V) ||
+		    (tlb_type != hypervisor &&
+		     (pte_val(pte) & _PAGE_SZALL_4U) == _PAGE_SZHUGE_4U)) {
+			tsb_index = MM_TSB_HUGE;
+			tsb_hash_shift = HPAGE_SHIFT;
+		}
 	}
+#endif
+
+	tsb = mm->context.tsb_block[tsb_index].tsb;
+	tsb += ((address >> tsb_hash_shift) &
+		(mm->context.tsb_block[tsb_index].tsb_nentries - 1UL));
+	tag = (address >> 22UL);
+	tsb_insert(tsb, tag, pte_val(pte));
+
+	spin_unlock_irqrestore(&mm->context.lock, flags);
 }
 
 void flush_dcache_page(struct page *page)
@@ -276,6 +364,9 @@ void flush_dcache_page(struct page *page)
 	struct address_space *mapping;
 	int this_cpu;
 
+	if (tlb_type == hypervisor)
+		return;
+
 	/* Do not bother with the expensive D-cache flush if it
 	 * is merely the zero page.  The 'bigcore' testcase in GDB
 	 * causes this case to run millions of times.
@@ -311,7 +402,7 @@ out:
 
 void __kprobes flush_icache_range(unsigned long start, unsigned long end)
 {
-	/* Cheetah has coherent I-cache. */
+	/* Cheetah and Hypervisor platform cpus have coherent I-cache. */
 	if (tlb_type == spitfire) {
 		unsigned long kaddr;
 
@@ -320,16 +411,6 @@ void __kprobes flush_icache_range(unsigned long start, unsigned long end)
 	}
 }
 
-unsigned long page_to_pfn(struct page *page)
-{
-	return (unsigned long) ((page - mem_map) + pfn_base);
-}
-
-struct page *pfn_to_page(unsigned long pfn)
-{
-	return (mem_map + (pfn - pfn_base));
-}
-
 void show_mem(void)
 {
 	printk("Mem-info:\n");
@@ -338,7 +419,6 @@ void show_mem(void)
 	       nr_swap_pages << (PAGE_SHIFT-10));
 	printk("%ld pages of RAM\n", num_physpages);
 	printk("%d free pages\n", nr_free_pages());
-	printk("%d pages in page table cache\n",pgtable_cache_size);
 }
 
 void mmu_info(struct seq_file *m)
@@ -349,6 +429,8 @@ void mmu_info(struct seq_file *m)
 		seq_printf(m, "MMU Type\t: Cheetah+\n");
 	else if (tlb_type == spitfire)
 		seq_printf(m, "MMU Type\t: Spitfire\n");
+	else if (tlb_type == hypervisor)
+		seq_printf(m, "MMU Type\t: Hypervisor (sun4v)\n");
 	else
 		seq_printf(m, "MMU Type\t: ???\n");
 
@@ -371,45 +453,13 @@ struct linux_prom_translation {
 /* Exported for kernel TLB miss handling in ktlb.S */
 struct linux_prom_translation prom_trans[512] __read_mostly;
 unsigned int prom_trans_ents __read_mostly;
-unsigned int swapper_pgd_zero __read_mostly;
-
-extern unsigned long prom_boot_page;
-extern void prom_remap(unsigned long physpage, unsigned long virtpage, int mmu_ihandle);
-extern int prom_get_mmu_ihandle(void);
-extern void register_prom_callbacks(void);
 
 /* Exported for SMP bootup purposes. */
 unsigned long kern_locked_tte_data;
 
-/*
- * Translate PROM's mapping we capture at boot time into physical address.
- * The second parameter is only set from prom_callback() invocations.
- */
-unsigned long prom_virt_to_phys(unsigned long promva, int *error)
-{
-	int i;
-
-	for (i = 0; i < prom_trans_ents; i++) {
-		struct linux_prom_translation *p = &prom_trans[i];
-
-		if (promva >= p->virt &&
-		    promva < (p->virt + p->size)) {
-			unsigned long base = p->data & _PAGE_PADDR;
-
-			if (error)
-				*error = 0;
-			return base + (promva & (8192 - 1));
-		}
-	}
-	if (error)
-		*error = 1;
-	return 0UL;
-}
-
 /* The obp translations are saved based on 8k pagesize, since obp can
  * use a mixture of pagesizes. Misses to the LOW_OBP_ADDRESS ->
- * HI_OBP_ADDRESS range are handled in ktlb.S and do not use the vpte
- * scheme (also, see rant in inherit_locked_prom_mappings()).
+ * HI_OBP_ADDRESS range are handled in ktlb.S.
  */
 static inline int in_obp_range(unsigned long vaddr)
 {
@@ -490,6 +540,36 @@ static void __init read_obp_translations(void)
 	}
 }
 
+static void __init hypervisor_tlb_lock(unsigned long vaddr,
+				       unsigned long pte,
+				       unsigned long mmu)
+{
+	register unsigned long func asm("%o5");
+	register unsigned long arg0 asm("%o0");
+	register unsigned long arg1 asm("%o1");
+	register unsigned long arg2 asm("%o2");
+	register unsigned long arg3 asm("%o3");
+
+	func = HV_FAST_MMU_MAP_PERM_ADDR;
+	arg0 = vaddr;
+	arg1 = 0;
+	arg2 = pte;
+	arg3 = mmu;
+	__asm__ __volatile__("ta	0x80"
+			     : "=&r" (func), "=&r" (arg0),
+			       "=&r" (arg1), "=&r" (arg2),
+			       "=&r" (arg3)
+			     : "0" (func), "1" (arg0), "2" (arg1),
+			       "3" (arg2), "4" (arg3));
+	if (arg0 != 0) {
+		prom_printf("hypervisor_tlb_lock[%lx:%lx:%lx:%lx]: "
+			    "errors with %lx\n", vaddr, 0, pte, mmu, arg0);
+		prom_halt();
+	}
+}
+
+static unsigned long kern_large_tte(unsigned long paddr);
+
 static void __init remap_kernel(void)
 {
 	unsigned long phys_page, tte_vaddr, tte_data;
@@ -497,25 +577,34 @@ static void __init remap_kernel(void)
 
 	tte_vaddr = (unsigned long) KERNBASE;
 	phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
-	tte_data = (phys_page | (_PAGE_VALID | _PAGE_SZ4MB |
-				 _PAGE_CP | _PAGE_CV | _PAGE_P |
-				 _PAGE_L | _PAGE_W));
+	tte_data = kern_large_tte(phys_page);
 
 	kern_locked_tte_data = tte_data;
 
-	/* Now lock us into the TLBs via OBP. */
-	prom_dtlb_load(tlb_ent, tte_data, tte_vaddr);
-	prom_itlb_load(tlb_ent, tte_data, tte_vaddr);
-	if (bigkernel) {
-		tlb_ent -= 1;
-		prom_dtlb_load(tlb_ent,
-			       tte_data + 0x400000, 
-			       tte_vaddr + 0x400000);
-		prom_itlb_load(tlb_ent,
-			       tte_data + 0x400000, 
-			       tte_vaddr + 0x400000);
+	/* Now lock us into the TLBs via Hypervisor or OBP. */
+	if (tlb_type == hypervisor) {
+		hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
+		hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
+		if (bigkernel) {
+			tte_vaddr += 0x400000;
+			tte_data += 0x400000;
+			hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
+			hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
+		}
+	} else {
+		prom_dtlb_load(tlb_ent, tte_data, tte_vaddr);
+		prom_itlb_load(tlb_ent, tte_data, tte_vaddr);
+		if (bigkernel) {
+			tlb_ent -= 1;
+			prom_dtlb_load(tlb_ent,
+				       tte_data + 0x400000, 
+				       tte_vaddr + 0x400000);
+			prom_itlb_load(tlb_ent,
+				       tte_data + 0x400000, 
+				       tte_vaddr + 0x400000);
+		}
+		sparc64_highest_unlocked_tlb_ent = tlb_ent - 1;
 	}
-	sparc64_highest_unlocked_tlb_ent = tlb_ent - 1;
 	if (tlb_type == cheetah_plus) {
 		sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 |
 					    CTX_CHEETAH_PLUS_NUC);
@@ -533,372 +622,14 @@ static void __init inherit_prom_mappings(void)
 	prom_printf("Remapping the kernel... ");
 	remap_kernel();
 	prom_printf("done.\n");
-
-	prom_printf("Registering callbacks... ");
-	register_prom_callbacks();
-	prom_printf("done.\n");
-}
-
-/* The OBP specifications for sun4u mark 0xfffffffc00000000 and
- * upwards as reserved for use by the firmware (I wonder if this
- * will be the same on Cheetah...).  We use this virtual address
- * range for the VPTE table mappings of the nucleus so we need
- * to zap them when we enter the PROM.  -DaveM
- */
-static void __flush_nucleus_vptes(void)
-{
-	unsigned long prom_reserved_base = 0xfffffffc00000000UL;
-	int i;
-
-	/* Only DTLB must be checked for VPTE entries. */
-	if (tlb_type == spitfire) {
-		for (i = 0; i < 63; i++) {
-			unsigned long tag;
-
-			/* Spitfire Errata #32 workaround */
-			/* NOTE: Always runs on spitfire, so no cheetah+
-			 *       page size encodings.
-			 */
-			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-					     "flush	%%g6"
-					     : /* No outputs */
-					     : "r" (0),
-					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-			tag = spitfire_get_dtlb_tag(i);
-			if (((tag & ~(PAGE_MASK)) == 0) &&
-			    ((tag &  (PAGE_MASK)) >= prom_reserved_base)) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : /* no outputs */
-						     : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				spitfire_put_dtlb_data(i, 0x0UL);
-			}
-		}
-	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
-		for (i = 0; i < 512; i++) {
-			unsigned long tag = cheetah_get_dtlb_tag(i, 2);
-
-			if ((tag & ~PAGE_MASK) == 0 &&
-			    (tag & PAGE_MASK) >= prom_reserved_base) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : /* no outputs */
-						     : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				cheetah_put_dtlb_data(i, 0x0UL, 2);
-			}
-
-			if (tlb_type != cheetah_plus)
-				continue;
-
-			tag = cheetah_get_dtlb_tag(i, 3);
-
-			if ((tag & ~PAGE_MASK) == 0 &&
-			    (tag & PAGE_MASK) >= prom_reserved_base) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : /* no outputs */
-						     : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				cheetah_put_dtlb_data(i, 0x0UL, 3);
-			}
-		}
-	} else {
-		/* Implement me :-) */
-		BUG();
-	}
 }
 
-static int prom_ditlb_set;
-struct prom_tlb_entry {
-	int		tlb_ent;
-	unsigned long	tlb_tag;
-	unsigned long	tlb_data;
-};
-struct prom_tlb_entry prom_itlb[16], prom_dtlb[16];
-
 void prom_world(int enter)
 {
-	unsigned long pstate;
-	int i;
-
 	if (!enter)
 		set_fs((mm_segment_t) { get_thread_current_ds() });
 
-	if (!prom_ditlb_set)
-		return;
-
-	/* Make sure the following runs atomically. */
-	__asm__ __volatile__("flushw\n\t"
-			     "rdpr	%%pstate, %0\n\t"
-			     "wrpr	%0, %1, %%pstate"
-			     : "=r" (pstate)
-			     : "i" (PSTATE_IE));
-
-	if (enter) {
-		/* Kick out nucleus VPTEs. */
-		__flush_nucleus_vptes();
-
-		/* Install PROM world. */
-		for (i = 0; i < 16; i++) {
-			if (prom_dtlb[i].tlb_ent != -1) {
-				__asm__ __volatile__("stxa %0, [%1] %2\n\t"
-						     "membar #Sync"
-					: : "r" (prom_dtlb[i].tlb_tag), "r" (TLB_TAG_ACCESS),
-					"i" (ASI_DMMU));
-				if (tlb_type == spitfire)
-					spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent,
-							       prom_dtlb[i].tlb_data);
-				else if (tlb_type == cheetah || tlb_type == cheetah_plus)
-					cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent,
-							       prom_dtlb[i].tlb_data);
-			}
-			if (prom_itlb[i].tlb_ent != -1) {
-				__asm__ __volatile__("stxa %0, [%1] %2\n\t"
-						     "membar #Sync"
-						     : : "r" (prom_itlb[i].tlb_tag),
-						     "r" (TLB_TAG_ACCESS),
-						     "i" (ASI_IMMU));
-				if (tlb_type == spitfire)
-					spitfire_put_itlb_data(prom_itlb[i].tlb_ent,
-							       prom_itlb[i].tlb_data);
-				else if (tlb_type == cheetah || tlb_type == cheetah_plus)
-					cheetah_put_litlb_data(prom_itlb[i].tlb_ent,
-							       prom_itlb[i].tlb_data);
-			}
-		}
-	} else {
-		for (i = 0; i < 16; i++) {
-			if (prom_dtlb[i].tlb_ent != -1) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-					: : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				if (tlb_type == spitfire)
-					spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, 0x0UL);
-				else
-					cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, 0x0UL);
-			}
-			if (prom_itlb[i].tlb_ent != -1) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : : "r" (TLB_TAG_ACCESS),
-						     "i" (ASI_IMMU));
-				if (tlb_type == spitfire)
-					spitfire_put_itlb_data(prom_itlb[i].tlb_ent, 0x0UL);
-				else
-					cheetah_put_litlb_data(prom_itlb[i].tlb_ent, 0x0UL);
-			}
-		}
-	}
-	__asm__ __volatile__("wrpr	%0, 0, %%pstate"
-			     : : "r" (pstate));
-}
-
-void inherit_locked_prom_mappings(int save_p)
-{
-	int i;
-	int dtlb_seen = 0;
-	int itlb_seen = 0;
-
-	/* Fucking losing PROM has more mappings in the TLB, but
-	 * it (conveniently) fails to mention any of these in the
-	 * translations property.  The only ones that matter are
-	 * the locked PROM tlb entries, so we impose the following
-	 * irrecovable rule on the PROM, it is allowed 8 locked
-	 * entries in the ITLB and 8 in the DTLB.
-	 *
-	 * Supposedly the upper 16GB of the address space is
-	 * reserved for OBP, BUT I WISH THIS WAS DOCUMENTED
-	 * SOMEWHERE!!!!!!!!!!!!!!!!!  Furthermore the entire interface
-	 * used between the client program and the firmware on sun5
-	 * systems to coordinate mmu mappings is also COMPLETELY
-	 * UNDOCUMENTED!!!!!! Thanks S(t)un!
-	 */
-	if (save_p) {
-		for (i = 0; i < 16; i++) {
-			prom_itlb[i].tlb_ent = -1;
-			prom_dtlb[i].tlb_ent = -1;
-		}
-	}
-	if (tlb_type == spitfire) {
-		int high = sparc64_highest_unlocked_tlb_ent;
-		for (i = 0; i <= high; i++) {
-			unsigned long data;
-
-			/* Spitfire Errata #32 workaround */
-			/* NOTE: Always runs on spitfire, so no cheetah+
-			 *       page size encodings.
-			 */
-			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-					     "flush	%%g6"
-					     : /* No outputs */
-					     : "r" (0),
-					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-			data = spitfire_get_dtlb_data(i);
-			if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) {
-				unsigned long tag;
-
-				/* Spitfire Errata #32 workaround */
-				/* NOTE: Always runs on spitfire, so no
-				 *       cheetah+ page size encodings.
-				 */
-				__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-						     "flush	%%g6"
-						     : /* No outputs */
-						     : "r" (0),
-						     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-				tag = spitfire_get_dtlb_tag(i);
-				if (save_p) {
-					prom_dtlb[dtlb_seen].tlb_ent = i;
-					prom_dtlb[dtlb_seen].tlb_tag = tag;
-					prom_dtlb[dtlb_seen].tlb_data = data;
-				}
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				spitfire_put_dtlb_data(i, 0x0UL);
-
-				dtlb_seen++;
-				if (dtlb_seen > 15)
-					break;
-			}
-		}
-
-		for (i = 0; i < high; i++) {
-			unsigned long data;
-
-			/* Spitfire Errata #32 workaround */
-			/* NOTE: Always runs on spitfire, so no
-			 *       cheetah+ page size encodings.
-			 */
-			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-					     "flush	%%g6"
-					     : /* No outputs */
-					     : "r" (0),
-					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-			data = spitfire_get_itlb_data(i);
-			if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) {
-				unsigned long tag;
-
-				/* Spitfire Errata #32 workaround */
-				/* NOTE: Always runs on spitfire, so no
-				 *       cheetah+ page size encodings.
-				 */
-				__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-						     "flush	%%g6"
-						     : /* No outputs */
-						     : "r" (0),
-						     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-				tag = spitfire_get_itlb_tag(i);
-				if (save_p) {
-					prom_itlb[itlb_seen].tlb_ent = i;
-					prom_itlb[itlb_seen].tlb_tag = tag;
-					prom_itlb[itlb_seen].tlb_data = data;
-				}
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU));
-				spitfire_put_itlb_data(i, 0x0UL);
-
-				itlb_seen++;
-				if (itlb_seen > 15)
-					break;
-			}
-		}
-	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
-		int high = sparc64_highest_unlocked_tlb_ent;
-
-		for (i = 0; i <= high; i++) {
-			unsigned long data;
-
-			data = cheetah_get_ldtlb_data(i);
-			if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) {
-				unsigned long tag;
-
-				tag = cheetah_get_ldtlb_tag(i);
-				if (save_p) {
-					prom_dtlb[dtlb_seen].tlb_ent = i;
-					prom_dtlb[dtlb_seen].tlb_tag = tag;
-					prom_dtlb[dtlb_seen].tlb_data = data;
-				}
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				cheetah_put_ldtlb_data(i, 0x0UL);
-
-				dtlb_seen++;
-				if (dtlb_seen > 15)
-					break;
-			}
-		}
-
-		for (i = 0; i < high; i++) {
-			unsigned long data;
-
-			data = cheetah_get_litlb_data(i);
-			if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) {
-				unsigned long tag;
-
-				tag = cheetah_get_litlb_tag(i);
-				if (save_p) {
-					prom_itlb[itlb_seen].tlb_ent = i;
-					prom_itlb[itlb_seen].tlb_tag = tag;
-					prom_itlb[itlb_seen].tlb_data = data;
-				}
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU));
-				cheetah_put_litlb_data(i, 0x0UL);
-
-				itlb_seen++;
-				if (itlb_seen > 15)
-					break;
-			}
-		}
-	} else {
-		/* Implement me :-) */
-		BUG();
-	}
-	if (save_p)
-		prom_ditlb_set = 1;
-}
-
-/* Give PROM back his world, done during reboots... */
-void prom_reload_locked(void)
-{
-	int i;
-
-	for (i = 0; i < 16; i++) {
-		if (prom_dtlb[i].tlb_ent != -1) {
-			__asm__ __volatile__("stxa %0, [%1] %2\n\t"
-					     "membar #Sync"
-				: : "r" (prom_dtlb[i].tlb_tag), "r" (TLB_TAG_ACCESS),
-				"i" (ASI_DMMU));
-			if (tlb_type == spitfire)
-				spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent,
-						       prom_dtlb[i].tlb_data);
-			else if (tlb_type == cheetah || tlb_type == cheetah_plus)
-				cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent,
-						      prom_dtlb[i].tlb_data);
-		}
-
-		if (prom_itlb[i].tlb_ent != -1) {
-			__asm__ __volatile__("stxa %0, [%1] %2\n\t"
-					     "membar #Sync"
-					     : : "r" (prom_itlb[i].tlb_tag),
-					     "r" (TLB_TAG_ACCESS),
-					     "i" (ASI_IMMU));
-			if (tlb_type == spitfire)
-				spitfire_put_itlb_data(prom_itlb[i].tlb_ent,
-						       prom_itlb[i].tlb_data);
-			else
-				cheetah_put_litlb_data(prom_itlb[i].tlb_ent,
-						       prom_itlb[i].tlb_data);
-		}
-	}
+	__asm__ __volatile__("flushw");
 }
 
 #ifdef DCACHE_ALIASING_POSSIBLE
@@ -914,7 +645,7 @@ void __flush_dcache_range(unsigned long start, unsigned long end)
 			if (++n >= 512)
 				break;
 		}
-	} else {
+	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
 		start = __pa(start);
 		end = __pa(end);
 		for (va = start; va < end; va += 32)
@@ -927,81 +658,28 @@ void __flush_dcache_range(unsigned long start, unsigned long end)
 }
 #endif /* DCACHE_ALIASING_POSSIBLE */
 
-/* If not locked, zap it. */
-void __flush_tlb_all(void)
+/* Caller does TLB context flushing on local CPU if necessary.
+ * The caller also ensures that CTX_VALID(mm->context) is false.
+ *
+ * We must be careful about boundary cases so that we never
+ * let the user have CTX 0 (nucleus) or we ever use a CTX
+ * version of zero (and thus NO_CONTEXT would not be caught
+ * by version mis-match tests in mmu_context.h).
+ *
+ * Always invoked with interrupts disabled.
+ */
+void get_new_mmu_context(struct mm_struct *mm)
 {
-	unsigned long pstate;
-	int i;
+	unsigned long ctx, new_ctx;
+	unsigned long orig_pgsz_bits;
+	unsigned long flags;
+	int new_version;
 
-	__asm__ __volatile__("flushw\n\t"
-			     "rdpr	%%pstate, %0\n\t"
-			     "wrpr	%0, %1, %%pstate"
-			     : "=r" (pstate)
-			     : "i" (PSTATE_IE));
-	if (tlb_type == spitfire) {
-		for (i = 0; i < 64; i++) {
-			/* Spitfire Errata #32 workaround */
-			/* NOTE: Always runs on spitfire, so no
-			 *       cheetah+ page size encodings.
-			 */
-			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-					     "flush	%%g6"
-					     : /* No outputs */
-					     : "r" (0),
-					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-			if (!(spitfire_get_dtlb_data(i) & _PAGE_L)) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : /* no outputs */
-						     : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
-				spitfire_put_dtlb_data(i, 0x0UL);
-			}
-
-			/* Spitfire Errata #32 workaround */
-			/* NOTE: Always runs on spitfire, so no
-			 *       cheetah+ page size encodings.
-			 */
-			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-					     "flush	%%g6"
-					     : /* No outputs */
-					     : "r" (0),
-					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
-
-			if (!(spitfire_get_itlb_data(i) & _PAGE_L)) {
-				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
-						     "membar #Sync"
-						     : /* no outputs */
-						     : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU));
-				spitfire_put_itlb_data(i, 0x0UL);
-			}
-		}
-	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
-		cheetah_flush_dtlb_all();
-		cheetah_flush_itlb_all();
-	}
-	__asm__ __volatile__("wrpr	%0, 0, %%pstate"
-			     : : "r" (pstate));
-}
-
-/* Caller does TLB context flushing on local CPU if necessary.
- * The caller also ensures that CTX_VALID(mm->context) is false.
- *
- * We must be careful about boundary cases so that we never
- * let the user have CTX 0 (nucleus) or we ever use a CTX
- * version of zero (and thus NO_CONTEXT would not be caught
- * by version mis-match tests in mmu_context.h).
- */
-void get_new_mmu_context(struct mm_struct *mm)
-{
-	unsigned long ctx, new_ctx;
-	unsigned long orig_pgsz_bits;
-	
-
-	spin_lock(&ctx_alloc_lock);
+	spin_lock_irqsave(&ctx_alloc_lock, flags);
 	orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK);
 	ctx = (tlb_context_cache + 1) & CTX_NR_MASK;
 	new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx);
+	new_version = 0;
 	if (new_ctx >= (1 << CTX_NR_BITS)) {
 		new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1);
 		if (new_ctx >= ctx) {
@@ -1024,6 +702,7 @@ void get_new_mmu_context(struct mm_struct *mm)
 				mmu_context_bmap[i + 2] = 0;
 				mmu_context_bmap[i + 3] = 0;
 			}
+			new_version = 1;
 			goto out;
 		}
 	}
@@ -1032,79 +711,10 @@ void get_new_mmu_context(struct mm_struct *mm)
 out:
 	tlb_context_cache = new_ctx;
 	mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits;
-	spin_unlock(&ctx_alloc_lock);
-}
-
-#ifndef CONFIG_SMP
-struct pgtable_cache_struct pgt_quicklists;
-#endif
-
-/* OK, we have to color these pages. The page tables are accessed
- * by non-Dcache enabled mapping in the VPTE area by the dtlb_backend.S
- * code, as well as by PAGE_OFFSET range direct-mapped addresses by 
- * other parts of the kernel. By coloring, we make sure that the tlbmiss 
- * fast handlers do not get data from old/garbage dcache lines that 
- * correspond to an old/stale virtual address (user/kernel) that 
- * previously mapped the pagetable page while accessing vpte range 
- * addresses. The idea is that if the vpte color and PAGE_OFFSET range 
- * color is the same, then when the kernel initializes the pagetable 
- * using the later address range, accesses with the first address
- * range will see the newly initialized data rather than the garbage.
- */
-#ifdef DCACHE_ALIASING_POSSIBLE
-#define DC_ALIAS_SHIFT	1
-#else
-#define DC_ALIAS_SHIFT	0
-#endif
-pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
-{
-	struct page *page;
-	unsigned long color;
-
-	{
-		pte_t *ptep = pte_alloc_one_fast(mm, address);
-
-		if (ptep)
-			return ptep;
-	}
-
-	color = VPTE_COLOR(address);
-	page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, DC_ALIAS_SHIFT);
-	if (page) {
-		unsigned long *to_free;
-		unsigned long paddr;
-		pte_t *pte;
-
-#ifdef DCACHE_ALIASING_POSSIBLE
-		set_page_count(page, 1);
-		ClearPageCompound(page);
-
-		set_page_count((page + 1), 1);
-		ClearPageCompound(page + 1);
-#endif
-		paddr = (unsigned long) page_address(page);
-		memset((char *)paddr, 0, (PAGE_SIZE << DC_ALIAS_SHIFT));
+	spin_unlock_irqrestore(&ctx_alloc_lock, flags);
 
-		if (!color) {
-			pte = (pte_t *) paddr;
-			to_free = (unsigned long *) (paddr + PAGE_SIZE);
-		} else {
-			pte = (pte_t *) (paddr + PAGE_SIZE);
-			to_free = (unsigned long *) paddr;
-		}
-
-#ifdef DCACHE_ALIASING_POSSIBLE
-		/* Now free the other one up, adjust cache size. */
-		preempt_disable();
-		*to_free = (unsigned long) pte_quicklist[color ^ 0x1];
-		pte_quicklist[color ^ 0x1] = to_free;
-		pgtable_cache_size++;
-		preempt_enable();
-#endif
-
-		return pte;
-	}
-	return NULL;
+	if (unlikely(new_version))
+		smp_new_mmu_context_version();
 }
 
 void sparc_ultra_dump_itlb(void)
@@ -1196,9 +806,187 @@ void sparc_ultra_dump_dtlb(void)
 
 extern unsigned long cmdline_memory_size;
 
-unsigned long __init bootmem_init(unsigned long *pages_avail)
+/* Find a free area for the bootmem map, avoiding the kernel image
+ * and the initial ramdisk.
+ */
+static unsigned long __init choose_bootmap_pfn(unsigned long start_pfn,
+					       unsigned long end_pfn)
+{
+	unsigned long avoid_start, avoid_end, bootmap_size;
+	int i;
+
+	bootmap_size = ((end_pfn - start_pfn) + 7) / 8;
+	bootmap_size = ALIGN(bootmap_size, sizeof(long));
+
+	avoid_start = avoid_end = 0;
+#ifdef CONFIG_BLK_DEV_INITRD
+	avoid_start = initrd_start;
+	avoid_end = PAGE_ALIGN(initrd_end);
+#endif
+
+#ifdef CONFIG_DEBUG_BOOTMEM
+	prom_printf("choose_bootmap_pfn: kern[%lx:%lx] avoid[%lx:%lx]\n",
+		    kern_base, PAGE_ALIGN(kern_base + kern_size),
+		    avoid_start, avoid_end);
+#endif
+	for (i = 0; i < pavail_ents; i++) {
+		unsigned long start, end;
+
+		start = pavail[i].phys_addr;
+		end = start + pavail[i].reg_size;
+
+		while (start < end) {
+			if (start >= kern_base &&
+			    start < PAGE_ALIGN(kern_base + kern_size)) {
+				start = PAGE_ALIGN(kern_base + kern_size);
+				continue;
+			}
+			if (start >= avoid_start && start < avoid_end) {
+				start = avoid_end;
+				continue;
+			}
+
+			if ((end - start) < bootmap_size)
+				break;
+
+			if (start < kern_base &&
+			    (start + bootmap_size) > kern_base) {
+				start = PAGE_ALIGN(kern_base + kern_size);
+				continue;
+			}
+
+			if (start < avoid_start &&
+			    (start + bootmap_size) > avoid_start) {
+				start = avoid_end;
+				continue;
+			}
+
+			/* OK, it doesn't overlap anything, use it.  */
+#ifdef CONFIG_DEBUG_BOOTMEM
+			prom_printf("choose_bootmap_pfn: Using %lx [%lx]\n",
+				    start >> PAGE_SHIFT, start);
+#endif
+			return start >> PAGE_SHIFT;
+		}
+	}
+
+	prom_printf("Cannot find free area for bootmap, aborting.\n");
+	prom_halt();
+}
+
+static void __init trim_pavail(unsigned long *cur_size_p,
+			       unsigned long *end_of_phys_p)
 {
-	unsigned long bootmap_size, start_pfn, end_pfn;
+	unsigned long to_trim = *cur_size_p - cmdline_memory_size;
+	unsigned long avoid_start, avoid_end;
+	int i;
+
+	to_trim = PAGE_ALIGN(to_trim);
+
+	avoid_start = avoid_end = 0;
+#ifdef CONFIG_BLK_DEV_INITRD
+	avoid_start = initrd_start;
+	avoid_end = PAGE_ALIGN(initrd_end);
+#endif
+
+	/* Trim some pavail[] entries in order to satisfy the
+	 * requested "mem=xxx" kernel command line specification.
+	 *
+	 * We must not trim off the kernel image area nor the
+	 * initial ramdisk range (if any).  Also, we must not trim
+	 * any pavail[] entry down to zero in order to preserve
+	 * the invariant that all pavail[] entries have a non-zero
+	 * size which is assumed by all of the code in here.
+	 */
+	for (i = 0; i < pavail_ents; i++) {
+		unsigned long start, end, kern_end;
+		unsigned long trim_low, trim_high, n;
+
+		kern_end = PAGE_ALIGN(kern_base + kern_size);
+
+		trim_low = start = pavail[i].phys_addr;
+		trim_high = end = start + pavail[i].reg_size;
+
+		if (kern_base >= start &&
+		    kern_base < end) {
+			trim_low = kern_base;
+			if (kern_end >= end)
+				continue;
+		}
+		if (kern_end >= start &&
+		    kern_end < end) {
+			trim_high = kern_end;
+		}
+		if (avoid_start &&
+		    avoid_start >= start &&
+		    avoid_start < end) {
+			if (trim_low > avoid_start)
+				trim_low = avoid_start;
+			if (avoid_end >= end)
+				continue;
+		}
+		if (avoid_end &&
+		    avoid_end >= start &&
+		    avoid_end < end) {
+			if (trim_high < avoid_end)
+				trim_high = avoid_end;
+		}
+
+		if (trim_high <= trim_low)
+			continue;
+
+		if (trim_low == start && trim_high == end) {
+			/* Whole chunk is available for trimming.
+			 * Trim all except one page, in order to keep
+			 * entry non-empty.
+			 */
+			n = (end - start) - PAGE_SIZE;
+			if (n > to_trim)
+				n = to_trim;
+
+			if (n) {
+				pavail[i].phys_addr += n;
+				pavail[i].reg_size -= n;
+				to_trim -= n;
+			}
+		} else {
+			n = (trim_low - start);
+			if (n > to_trim)
+				n = to_trim;
+
+			if (n) {
+				pavail[i].phys_addr += n;
+				pavail[i].reg_size -= n;
+				to_trim -= n;
+			}
+			if (to_trim) {
+				n = end - trim_high;
+				if (n > to_trim)
+					n = to_trim;
+				if (n) {
+					pavail[i].reg_size -= n;
+					to_trim -= n;
+				}
+			}
+		}
+
+		if (!to_trim)
+			break;
+	}
+
+	/* Recalculate.  */
+	*cur_size_p = 0UL;
+	for (i = 0; i < pavail_ents; i++) {
+		*end_of_phys_p = pavail[i].phys_addr +
+			pavail[i].reg_size;
+		*cur_size_p += pavail[i].reg_size;
+	}
+}
+
+static unsigned long __init bootmem_init(unsigned long *pages_avail,
+					 unsigned long phys_base)
+{
+	unsigned long bootmap_size, end_pfn;
 	unsigned long end_of_phys_memory = 0UL;
 	unsigned long bootmap_pfn, bytes_avail, size;
 	int i;
@@ -1212,39 +1000,13 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
 		end_of_phys_memory = pavail[i].phys_addr +
 			pavail[i].reg_size;
 		bytes_avail += pavail[i].reg_size;
-		if (cmdline_memory_size) {
-			if (bytes_avail > cmdline_memory_size) {
-				unsigned long slack = bytes_avail - cmdline_memory_size;
-
-				bytes_avail -= slack;
-				end_of_phys_memory -= slack;
-
-				pavail[i].reg_size -= slack;
-				if ((long)pavail[i].reg_size <= 0L) {
-					pavail[i].phys_addr = 0xdeadbeefUL;
-					pavail[i].reg_size = 0UL;
-					pavail_ents = i;
-				} else {
-					pavail[i+1].reg_size = 0Ul;
-					pavail[i+1].phys_addr = 0xdeadbeefUL;
-					pavail_ents = i + 1;
-				}
-				break;
-			}
-		}
 	}
 
-	*pages_avail = bytes_avail >> PAGE_SHIFT;
-
-	/* Start with page aligned address of last symbol in kernel
-	 * image.  The kernel is hard mapped below PAGE_OFFSET in a
-	 * 4MB locked TLB translation.
+	/* Determine the location of the initial ramdisk before trying
+	 * to honor the "mem=xxx" command line argument.  We must know
+	 * where the kernel image and the ramdisk image are so that we
+	 * do not trim those two areas from the physical memory map.
 	 */
-	start_pfn = PAGE_ALIGN(kern_base + kern_size) >> PAGE_SHIFT;
-
-	bootmap_pfn = start_pfn;
-
-	end_pfn = end_of_phys_memory >> PAGE_SHIFT;
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	/* Now have to check initial ramdisk, so that bootmap does not overwrite it */
@@ -1259,23 +1021,32 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
 		                 	 "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
 			       initrd_end, end_of_phys_memory);
 			initrd_start = 0;
-		}
-		if (initrd_start) {
-			if (initrd_start >= (start_pfn << PAGE_SHIFT) &&
-			    initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE)
-				bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT;
+			initrd_end = 0;
 		}
 	}
 #endif	
+
+	if (cmdline_memory_size &&
+	    bytes_avail > cmdline_memory_size)
+		trim_pavail(&bytes_avail,
+			    &end_of_phys_memory);
+
+	*pages_avail = bytes_avail >> PAGE_SHIFT;
+
+	end_pfn = end_of_phys_memory >> PAGE_SHIFT;
+
 	/* Initialize the boot-time allocator. */
 	max_pfn = max_low_pfn = end_pfn;
-	min_low_pfn = pfn_base;
+	min_low_pfn = (phys_base >> PAGE_SHIFT);
+
+	bootmap_pfn = choose_bootmap_pfn(min_low_pfn, end_pfn);
 
 #ifdef CONFIG_DEBUG_BOOTMEM
 	prom_printf("init_bootmem(min[%lx], bootmap[%lx], max[%lx])\n",
 		    min_low_pfn, bootmap_pfn, max_low_pfn);
 #endif
-	bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base, end_pfn);
+	bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn,
+					 min_low_pfn, end_pfn);
 
 	/* Now register the available physical memory with the
 	 * allocator.
@@ -1323,9 +1094,26 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
 	reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size);
 	*pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
 
+	for (i = 0; i < pavail_ents; i++) {
+		unsigned long start_pfn, end_pfn;
+
+		start_pfn = pavail[i].phys_addr >> PAGE_SHIFT;
+		end_pfn = (start_pfn + (pavail[i].reg_size >> PAGE_SHIFT));
+#ifdef CONFIG_DEBUG_BOOTMEM
+		prom_printf("memory_present(0, %lx, %lx)\n",
+			    start_pfn, end_pfn);
+#endif
+		memory_present(0, start_pfn, end_pfn);
+	}
+
+	sparse_init();
+
 	return end_pfn;
 }
 
+static struct linux_prom64_registers pall[MAX_BANKS] __initdata;
+static int pall_ents __initdata;
+
 #ifdef CONFIG_DEBUG_PAGEALLOC
 static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend, pgprot_t prot)
 {
@@ -1381,14 +1169,44 @@ static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend,
 	return alloc_bytes;
 }
 
-static struct linux_prom64_registers pall[MAX_BANKS] __initdata;
-static int pall_ents __initdata;
-
 extern unsigned int kvmap_linear_patch[1];
+#endif /* CONFIG_DEBUG_PAGEALLOC */
+
+static void __init mark_kpte_bitmap(unsigned long start, unsigned long end)
+{
+	const unsigned long shift_256MB = 28;
+	const unsigned long mask_256MB = ((1UL << shift_256MB) - 1UL);
+	const unsigned long size_256MB = (1UL << shift_256MB);
+
+	while (start < end) {
+		long remains;
+
+		remains = end - start;
+		if (remains < size_256MB)
+			break;
+
+		if (start & mask_256MB) {
+			start = (start + size_256MB) & ~mask_256MB;
+			continue;
+		}
+
+		while (remains >= size_256MB) {
+			unsigned long index = start >> shift_256MB;
+
+			__set_bit(index, kpte_linear_bitmap);
+
+			start += size_256MB;
+			remains -= size_256MB;
+		}
+	}
+}
 
 static void __init kernel_physical_mapping_init(void)
 {
-	unsigned long i, mem_alloced = 0UL;
+	unsigned long i;
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	unsigned long mem_alloced = 0UL;
+#endif
 
 	read_obp_memory("reg", &pall[0], &pall_ents);
 
@@ -1397,10 +1215,16 @@ static void __init kernel_physical_mapping_init(void)
 
 		phys_start = pall[i].phys_addr;
 		phys_end = phys_start + pall[i].reg_size;
+
+		mark_kpte_bitmap(phys_start, phys_end);
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
 		mem_alloced += kernel_map_range(phys_start, phys_end,
 						PAGE_KERNEL);
+#endif
 	}
 
+#ifdef CONFIG_DEBUG_PAGEALLOC
 	printk("Allocated %ld bytes for kernel page tables.\n",
 	       mem_alloced);
 
@@ -1408,8 +1232,10 @@ static void __init kernel_physical_mapping_init(void)
 	flushi(&kvmap_linear_patch[0]);
 
 	__flush_tlb_all();
+#endif
 }
 
+#ifdef CONFIG_DEBUG_PAGEALLOC
 void kernel_map_pages(struct page *page, int numpages, int enable)
 {
 	unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT;
@@ -1418,6 +1244,9 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 	kernel_map_range(phys_start, phys_end,
 			 (enable ? PAGE_KERNEL : __pgprot(0)));
 
+	flush_tsb_kernel_range(PAGE_OFFSET + phys_start,
+			       PAGE_OFFSET + phys_end);
+
 	/* we should perform an IPI and flush all tlbs,
 	 * but that can deadlock->flush only current cpu.
 	 */
@@ -1438,18 +1267,159 @@ unsigned long __init find_ecache_flush_span(unsigned long size)
 	return ~0UL;
 }
 
+static void __init tsb_phys_patch(void)
+{
+	struct tsb_ldquad_phys_patch_entry *pquad;
+	struct tsb_phys_patch_entry *p;
+
+	pquad = &__tsb_ldquad_phys_patch;
+	while (pquad < &__tsb_ldquad_phys_patch_end) {
+		unsigned long addr = pquad->addr;
+
+		if (tlb_type == hypervisor)
+			*(unsigned int *) addr = pquad->sun4v_insn;
+		else
+			*(unsigned int *) addr = pquad->sun4u_insn;
+		wmb();
+		__asm__ __volatile__("flush	%0"
+				     : /* no outputs */
+				     : "r" (addr));
+
+		pquad++;
+	}
+
+	p = &__tsb_phys_patch;
+	while (p < &__tsb_phys_patch_end) {
+		unsigned long addr = p->addr;
+
+		*(unsigned int *) addr = p->insn;
+		wmb();
+		__asm__ __volatile__("flush	%0"
+				     : /* no outputs */
+				     : "r" (addr));
+
+		p++;
+	}
+}
+
+/* Don't mark as init, we give this to the Hypervisor.  */
+#ifndef CONFIG_DEBUG_PAGEALLOC
+#define NUM_KTSB_DESCR	2
+#else
+#define NUM_KTSB_DESCR	1
+#endif
+static struct hv_tsb_descr ktsb_descr[NUM_KTSB_DESCR];
+extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
+
+static void __init sun4v_ktsb_init(void)
+{
+	unsigned long ktsb_pa;
+
+	/* First KTSB for PAGE_SIZE mappings.  */
+	ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE);
+
+	switch (PAGE_SIZE) {
+	case 8 * 1024:
+	default:
+		ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_8K;
+		ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_8K;
+		break;
+
+	case 64 * 1024:
+		ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_64K;
+		ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_64K;
+		break;
+
+	case 512 * 1024:
+		ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_512K;
+		ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_512K;
+		break;
+
+	case 4 * 1024 * 1024:
+		ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_4MB;
+		ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_4MB;
+		break;
+	};
+
+	ktsb_descr[0].assoc = 1;
+	ktsb_descr[0].num_ttes = KERNEL_TSB_NENTRIES;
+	ktsb_descr[0].ctx_idx = 0;
+	ktsb_descr[0].tsb_base = ktsb_pa;
+	ktsb_descr[0].resv = 0;
+
+#ifndef CONFIG_DEBUG_PAGEALLOC
+	/* Second KTSB for 4MB/256MB mappings.  */
+	ktsb_pa = (kern_base +
+		   ((unsigned long)&swapper_4m_tsb[0] - KERNBASE));
+
+	ktsb_descr[1].pgsz_idx = HV_PGSZ_IDX_4MB;
+	ktsb_descr[1].pgsz_mask = (HV_PGSZ_MASK_4MB |
+				   HV_PGSZ_MASK_256MB);
+	ktsb_descr[1].assoc = 1;
+	ktsb_descr[1].num_ttes = KERNEL_TSB4M_NENTRIES;
+	ktsb_descr[1].ctx_idx = 0;
+	ktsb_descr[1].tsb_base = ktsb_pa;
+	ktsb_descr[1].resv = 0;
+#endif
+}
+
+void __cpuinit sun4v_ktsb_register(void)
+{
+	register unsigned long func asm("%o5");
+	register unsigned long arg0 asm("%o0");
+	register unsigned long arg1 asm("%o1");
+	unsigned long pa;
+
+	pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE);
+
+	func = HV_FAST_MMU_TSB_CTX0;
+	arg0 = NUM_KTSB_DESCR;
+	arg1 = pa;
+	__asm__ __volatile__("ta	%6"
+			     : "=&r" (func), "=&r" (arg0), "=&r" (arg1)
+			     : "0" (func), "1" (arg0), "2" (arg1),
+			       "i" (HV_FAST_TRAP));
+}
+
 /* paging_init() sets up the page tables */
 
 extern void cheetah_ecache_flush_init(void);
+extern void sun4v_patch_tlb_handlers(void);
 
 static unsigned long last_valid_pfn;
 pgd_t swapper_pg_dir[2048];
 
+static void sun4u_pgprot_init(void);
+static void sun4v_pgprot_init(void);
+
 void __init paging_init(void)
 {
-	unsigned long end_pfn, pages_avail, shift;
+	unsigned long end_pfn, pages_avail, shift, phys_base;
 	unsigned long real_end, i;
 
+	kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
+	kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
+
+	/* Invalidate both kernel TSBs.  */
+	memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
+#ifndef CONFIG_DEBUG_PAGEALLOC
+	memset(swapper_4m_tsb, 0x40, sizeof(swapper_4m_tsb));
+#endif
+
+	if (tlb_type == hypervisor)
+		sun4v_pgprot_init();
+	else
+		sun4u_pgprot_init();
+
+	if (tlb_type == cheetah_plus ||
+	    tlb_type == hypervisor)
+		tsb_phys_patch();
+
+	if (tlb_type == hypervisor) {
+		sun4v_patch_tlb_handlers();
+		sun4v_ktsb_init();
+	}
+
 	/* Find available physical memory... */
 	read_obp_memory("available", &pavail[0], &pavail_ents);
 
@@ -1457,11 +1427,6 @@ void __init paging_init(void)
 	for (i = 0; i < pavail_ents; i++)
 		phys_base = min(phys_base, pavail[i].phys_addr);
 
-	pfn_base = phys_base >> PAGE_SHIFT;
-
-	kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
-	kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
-
 	set_bit(0, mmu_context_bmap);
 
 	shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE);
@@ -1485,47 +1450,40 @@ void __init paging_init(void)
 	pud_set(pud_offset(&swapper_pg_dir[0], 0),
 		swapper_low_pmd_dir + (shift / sizeof(pgd_t)));
 	
-	swapper_pgd_zero = pgd_val(swapper_pg_dir[0]);
-	
 	inherit_prom_mappings();
 	
-	/* Ok, we can use our TLB miss and window trap handlers safely.
-	 * We need to do a quick peek here to see if we are on StarFire
-	 * or not, so setup_tba can setup the IRQ globals correctly (it
-	 * needs to get the hard smp processor id correctly).
-	 */
-	{
-		extern void setup_tba(int);
-		setup_tba(this_is_starfire);
-	}
-
-	inherit_locked_prom_mappings(1);
+	/* Ok, we can use our TLB miss and window trap handlers safely.  */
+	setup_tba();
 
 	__flush_tlb_all();
 
+	if (tlb_type == hypervisor)
+		sun4v_ktsb_register();
+
 	/* Setup bootmem... */
 	pages_avail = 0;
-	last_valid_pfn = end_pfn = bootmem_init(&pages_avail);
+	last_valid_pfn = end_pfn = bootmem_init(&pages_avail, phys_base);
+
+	max_mapnr = last_valid_pfn;
 
-#ifdef CONFIG_DEBUG_PAGEALLOC
 	kernel_physical_mapping_init();
-#endif
+
+	prom_build_devicetree();
 
 	{
 		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 = end_pfn - pfn_base;
-		zones_size[ZONE_DMA] = npages;
-		zholes_size[ZONE_DMA] = npages - pages_avail;
+		zones_size[ZONE_DMA] = end_pfn;
+		zholes_size[ZONE_DMA] = end_pfn - pages_avail;
 
 		free_area_init_node(0, &contig_page_data, zones_size,
-				    phys_base >> PAGE_SHIFT, zholes_size);
+				    __pa(PAGE_OFFSET) >> PAGE_SHIFT,
+				    zholes_size);
 	}
 
 	device_scan();
@@ -1549,7 +1507,7 @@ static void __init taint_real_pages(void)
 		while (old_start < old_end) {
 			int n;
 
-			for (n = 0; pavail_rescan_ents; n++) {
+			for (n = 0; n < pavail_rescan_ents; n++) {
 				unsigned long new_start, new_end;
 
 				new_start = pavail_rescan[n].phys_addr;
@@ -1571,6 +1529,32 @@ static void __init taint_real_pages(void)
 	}
 }
 
+int __init page_in_phys_avail(unsigned long paddr)
+{
+	int i;
+
+	paddr &= PAGE_MASK;
+
+	for (i = 0; i < pavail_rescan_ents; i++) {
+		unsigned long start, end;
+
+		start = pavail_rescan[i].phys_addr;
+		end = start + pavail_rescan[i].reg_size;
+
+		if (paddr >= start && paddr < end)
+			return 1;
+	}
+	if (paddr >= kern_base && paddr < (kern_base + kern_size))
+		return 1;
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (paddr >= __pa(initrd_start) &&
+	    paddr < __pa(PAGE_ALIGN(initrd_end)))
+		return 1;
+#endif
+
+	return 0;
+}
+
 void __init mem_init(void)
 {
 	unsigned long codepages, datapages, initpages;
@@ -1595,7 +1579,6 @@ void __init mem_init(void)
 
 	taint_real_pages();
 
-	max_mapnr = last_valid_pfn - pfn_base;
 	high_memory = __va(last_valid_pfn << PAGE_SHIFT);
 
 #ifdef CONFIG_DEBUG_BOOTMEM
@@ -1648,11 +1631,11 @@ void free_initmem(void)
 		page = (addr +
 			((unsigned long) __va(kern_base)) -
 			((unsigned long) KERNBASE));
-		memset((void *)addr, 0xcc, PAGE_SIZE);
+		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
 		p = virt_to_page(page);
 
 		ClearPageReserved(p);
-		set_page_count(p, 1);
+		init_page_count(p);
 		__free_page(p);
 		num_physpages++;
 		totalram_pages++;
@@ -1668,10 +1651,365 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 		struct page *p = virt_to_page(start);
 
 		ClearPageReserved(p);
-		set_page_count(p, 1);
+		init_page_count(p);
 		__free_page(p);
 		num_physpages++;
 		totalram_pages++;
 	}
 }
 #endif
+
+#define _PAGE_CACHE_4U	(_PAGE_CP_4U | _PAGE_CV_4U)
+#define _PAGE_CACHE_4V	(_PAGE_CP_4V | _PAGE_CV_4V)
+#define __DIRTY_BITS_4U	 (_PAGE_MODIFIED_4U | _PAGE_WRITE_4U | _PAGE_W_4U)
+#define __DIRTY_BITS_4V	 (_PAGE_MODIFIED_4V | _PAGE_WRITE_4V | _PAGE_W_4V)
+#define __ACCESS_BITS_4U (_PAGE_ACCESSED_4U | _PAGE_READ_4U | _PAGE_R)
+#define __ACCESS_BITS_4V (_PAGE_ACCESSED_4V | _PAGE_READ_4V | _PAGE_R)
+
+pgprot_t PAGE_KERNEL __read_mostly;
+EXPORT_SYMBOL(PAGE_KERNEL);
+
+pgprot_t PAGE_KERNEL_LOCKED __read_mostly;
+pgprot_t PAGE_COPY __read_mostly;
+
+pgprot_t PAGE_SHARED __read_mostly;
+EXPORT_SYMBOL(PAGE_SHARED);
+
+pgprot_t PAGE_EXEC __read_mostly;
+unsigned long pg_iobits __read_mostly;
+
+unsigned long _PAGE_IE __read_mostly;
+EXPORT_SYMBOL(_PAGE_IE);
+
+unsigned long _PAGE_E __read_mostly;
+EXPORT_SYMBOL(_PAGE_E);
+
+unsigned long _PAGE_CACHE __read_mostly;
+EXPORT_SYMBOL(_PAGE_CACHE);
+
+static void prot_init_common(unsigned long page_none,
+			     unsigned long page_shared,
+			     unsigned long page_copy,
+			     unsigned long page_readonly,
+			     unsigned long page_exec_bit)
+{
+	PAGE_COPY = __pgprot(page_copy);
+	PAGE_SHARED = __pgprot(page_shared);
+
+	protection_map[0x0] = __pgprot(page_none);
+	protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit);
+	protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit);
+	protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit);
+	protection_map[0x4] = __pgprot(page_readonly);
+	protection_map[0x5] = __pgprot(page_readonly);
+	protection_map[0x6] = __pgprot(page_copy);
+	protection_map[0x7] = __pgprot(page_copy);
+	protection_map[0x8] = __pgprot(page_none);
+	protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit);
+	protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit);
+	protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit);
+	protection_map[0xc] = __pgprot(page_readonly);
+	protection_map[0xd] = __pgprot(page_readonly);
+	protection_map[0xe] = __pgprot(page_shared);
+	protection_map[0xf] = __pgprot(page_shared);
+}
+
+static void __init sun4u_pgprot_init(void)
+{
+	unsigned long page_none, page_shared, page_copy, page_readonly;
+	unsigned long page_exec_bit;
+
+	PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID |
+				_PAGE_CACHE_4U | _PAGE_P_4U |
+				__ACCESS_BITS_4U | __DIRTY_BITS_4U |
+				_PAGE_EXEC_4U);
+	PAGE_KERNEL_LOCKED = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID |
+				       _PAGE_CACHE_4U | _PAGE_P_4U |
+				       __ACCESS_BITS_4U | __DIRTY_BITS_4U |
+				       _PAGE_EXEC_4U | _PAGE_L_4U);
+	PAGE_EXEC = __pgprot(_PAGE_EXEC_4U);
+
+	_PAGE_IE = _PAGE_IE_4U;
+	_PAGE_E = _PAGE_E_4U;
+	_PAGE_CACHE = _PAGE_CACHE_4U;
+
+	pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4U | __DIRTY_BITS_4U |
+		     __ACCESS_BITS_4U | _PAGE_E_4U);
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4U) ^
+		0xfffff80000000000;
+#else
+	kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^
+		0xfffff80000000000;
+#endif
+	kern_linear_pte_xor[0] |= (_PAGE_CP_4U | _PAGE_CV_4U |
+				   _PAGE_P_4U | _PAGE_W_4U);
+
+	/* XXX Should use 256MB on Panther. XXX */
+	kern_linear_pte_xor[1] = kern_linear_pte_xor[0];
+
+	_PAGE_SZBITS = _PAGE_SZBITS_4U;
+	_PAGE_ALL_SZ_BITS =  (_PAGE_SZ4MB_4U | _PAGE_SZ512K_4U |
+			      _PAGE_SZ64K_4U | _PAGE_SZ8K_4U |
+			      _PAGE_SZ32MB_4U | _PAGE_SZ256MB_4U);
+
+
+	page_none = _PAGE_PRESENT_4U | _PAGE_ACCESSED_4U | _PAGE_CACHE_4U;
+	page_shared = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U |
+		       __ACCESS_BITS_4U | _PAGE_WRITE_4U | _PAGE_EXEC_4U);
+	page_copy   = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U |
+		       __ACCESS_BITS_4U | _PAGE_EXEC_4U);
+	page_readonly   = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U |
+			   __ACCESS_BITS_4U | _PAGE_EXEC_4U);
+
+	page_exec_bit = _PAGE_EXEC_4U;
+
+	prot_init_common(page_none, page_shared, page_copy, page_readonly,
+			 page_exec_bit);
+}
+
+static void __init sun4v_pgprot_init(void)
+{
+	unsigned long page_none, page_shared, page_copy, page_readonly;
+	unsigned long page_exec_bit;
+
+	PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4V | _PAGE_VALID |
+				_PAGE_CACHE_4V | _PAGE_P_4V |
+				__ACCESS_BITS_4V | __DIRTY_BITS_4V |
+				_PAGE_EXEC_4V);
+	PAGE_KERNEL_LOCKED = PAGE_KERNEL;
+	PAGE_EXEC = __pgprot(_PAGE_EXEC_4V);
+
+	_PAGE_IE = _PAGE_IE_4V;
+	_PAGE_E = _PAGE_E_4V;
+	_PAGE_CACHE = _PAGE_CACHE_4V;
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^
+		0xfffff80000000000;
+#else
+	kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^
+		0xfffff80000000000;
+#endif
+	kern_linear_pte_xor[0] |= (_PAGE_CP_4V | _PAGE_CV_4V |
+				   _PAGE_P_4V | _PAGE_W_4V);
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^
+		0xfffff80000000000;
+#else
+	kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZ256MB_4V) ^
+		0xfffff80000000000;
+#endif
+	kern_linear_pte_xor[1] |= (_PAGE_CP_4V | _PAGE_CV_4V |
+				   _PAGE_P_4V | _PAGE_W_4V);
+
+	pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4V | __DIRTY_BITS_4V |
+		     __ACCESS_BITS_4V | _PAGE_E_4V);
+
+	_PAGE_SZBITS = _PAGE_SZBITS_4V;
+	_PAGE_ALL_SZ_BITS = (_PAGE_SZ16GB_4V | _PAGE_SZ2GB_4V |
+			     _PAGE_SZ256MB_4V | _PAGE_SZ32MB_4V |
+			     _PAGE_SZ4MB_4V | _PAGE_SZ512K_4V |
+			     _PAGE_SZ64K_4V | _PAGE_SZ8K_4V);
+
+	page_none = _PAGE_PRESENT_4V | _PAGE_ACCESSED_4V | _PAGE_CACHE_4V;
+	page_shared = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V |
+		       __ACCESS_BITS_4V | _PAGE_WRITE_4V | _PAGE_EXEC_4V);
+	page_copy   = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V |
+		       __ACCESS_BITS_4V | _PAGE_EXEC_4V);
+	page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V |
+			 __ACCESS_BITS_4V | _PAGE_EXEC_4V);
+
+	page_exec_bit = _PAGE_EXEC_4V;
+
+	prot_init_common(page_none, page_shared, page_copy, page_readonly,
+			 page_exec_bit);
+}
+
+unsigned long pte_sz_bits(unsigned long sz)
+{
+	if (tlb_type == hypervisor) {
+		switch (sz) {
+		case 8 * 1024:
+		default:
+			return _PAGE_SZ8K_4V;
+		case 64 * 1024:
+			return _PAGE_SZ64K_4V;
+		case 512 * 1024:
+			return _PAGE_SZ512K_4V;
+		case 4 * 1024 * 1024:
+			return _PAGE_SZ4MB_4V;
+		};
+	} else {
+		switch (sz) {
+		case 8 * 1024:
+		default:
+			return _PAGE_SZ8K_4U;
+		case 64 * 1024:
+			return _PAGE_SZ64K_4U;
+		case 512 * 1024:
+			return _PAGE_SZ512K_4U;
+		case 4 * 1024 * 1024:
+			return _PAGE_SZ4MB_4U;
+		};
+	}
+}
+
+pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space, unsigned long page_size)
+{
+	pte_t pte;
+
+	pte_val(pte)  = page | pgprot_val(pgprot_noncached(prot));
+	pte_val(pte) |= (((unsigned long)space) << 32);
+	pte_val(pte) |= pte_sz_bits(page_size);
+
+	return pte;
+}
+
+static unsigned long kern_large_tte(unsigned long paddr)
+{
+	unsigned long val;
+
+	val = (_PAGE_VALID | _PAGE_SZ4MB_4U |
+	       _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_P_4U |
+	       _PAGE_EXEC_4U | _PAGE_L_4U | _PAGE_W_4U);
+	if (tlb_type == hypervisor)
+		val = (_PAGE_VALID | _PAGE_SZ4MB_4V |
+		       _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_P_4V |
+		       _PAGE_EXEC_4V | _PAGE_W_4V);
+
+	return val | paddr;
+}
+
+/*
+ * Translate PROM's mapping we capture at boot time into physical address.
+ * The second parameter is only set from prom_callback() invocations.
+ */
+unsigned long prom_virt_to_phys(unsigned long promva, int *error)
+{
+	unsigned long mask;
+	int i;
+
+	mask = _PAGE_PADDR_4U;
+	if (tlb_type == hypervisor)
+		mask = _PAGE_PADDR_4V;
+
+	for (i = 0; i < prom_trans_ents; i++) {
+		struct linux_prom_translation *p = &prom_trans[i];
+
+		if (promva >= p->virt &&
+		    promva < (p->virt + p->size)) {
+			unsigned long base = p->data & mask;
+
+			if (error)
+				*error = 0;
+			return base + (promva & (8192 - 1));
+		}
+	}
+	if (error)
+		*error = 1;
+	return 0UL;
+}
+
+/* XXX We should kill off this ugly thing at so me point. XXX */
+unsigned long sun4u_get_pte(unsigned long addr)
+{
+	pgd_t *pgdp;
+	pud_t *pudp;
+	pmd_t *pmdp;
+	pte_t *ptep;
+	unsigned long mask = _PAGE_PADDR_4U;
+
+	if (tlb_type == hypervisor)
+		mask = _PAGE_PADDR_4V;
+
+	if (addr >= PAGE_OFFSET)
+		return addr & mask;
+
+	if ((addr >= LOW_OBP_ADDRESS) && (addr < HI_OBP_ADDRESS))
+		return prom_virt_to_phys(addr, NULL);
+
+	pgdp = pgd_offset_k(addr);
+	pudp = pud_offset(pgdp, addr);
+	pmdp = pmd_offset(pudp, addr);
+	ptep = pte_offset_kernel(pmdp, addr);
+
+	return pte_val(*ptep) & mask;
+}
+
+/* If not locked, zap it. */
+void __flush_tlb_all(void)
+{
+	unsigned long pstate;
+	int i;
+
+	__asm__ __volatile__("flushw\n\t"
+			     "rdpr	%%pstate, %0\n\t"
+			     "wrpr	%0, %1, %%pstate"
+			     : "=r" (pstate)
+			     : "i" (PSTATE_IE));
+	if (tlb_type == spitfire) {
+		for (i = 0; i < 64; i++) {
+			/* Spitfire Errata #32 workaround */
+			/* NOTE: Always runs on spitfire, so no
+			 *       cheetah+ page size encodings.
+			 */
+			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+					     "flush	%%g6"
+					     : /* No outputs */
+					     : "r" (0),
+					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
+			if (!(spitfire_get_dtlb_data(i) & _PAGE_L_4U)) {
+				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
+						     "membar #Sync"
+						     : /* no outputs */
+						     : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
+				spitfire_put_dtlb_data(i, 0x0UL);
+			}
+
+			/* Spitfire Errata #32 workaround */
+			/* NOTE: Always runs on spitfire, so no
+			 *       cheetah+ page size encodings.
+			 */
+			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+					     "flush	%%g6"
+					     : /* No outputs */
+					     : "r" (0),
+					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
+			if (!(spitfire_get_itlb_data(i) & _PAGE_L_4U)) {
+				__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
+						     "membar #Sync"
+						     : /* no outputs */
+						     : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU));
+				spitfire_put_itlb_data(i, 0x0UL);
+			}
+		}
+	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
+		cheetah_flush_dtlb_all();
+		cheetah_flush_itlb_all();
+	}
+	__asm__ __volatile__("wrpr	%0, 0, %%pstate"
+			     : : "r" (pstate));
+}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+
+void online_page(struct page *page)
+{
+	ClearPageReserved(page);
+	init_page_count(page);
+	__free_page(page);
+	totalram_pages++;
+	num_physpages++;
+}
+
+int remove_memory(u64 start, u64 size)
+{
+	return -EINVAL;
+}
+
+#endif /* CONFIG_MEMORY_HOTPLUG */