[SPARC64]: Deal with PTE layout differences in SUN4V.

Yes, you heard it right, they changed the PTE layout for
SUN4V.  Ho hum...

This is the simple and inefficient way to support this.
It'll get optimized, don't worry.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/kernel/itlb_miss.S

@@ -6,9 +6,10 @@
 	 nop					! Delay slot (fill me)
 	TSB_LOAD_QUAD(%g1, %g4)			! Load TSB entry
 	cmp	%g4, %g6			! Compare TAG
-	sethi	%hi(_PAGE_EXEC), %g4		! Setup exec check
+	sethi	%hi(PAGE_EXEC), %g4		! Setup exec check
 
 /* ITLB ** ICACHE line 2: TSB compare and TLB load	*/
+	ldx	[%g4 + %lo(PAGE_EXEC)], %g4
 	bne,pn	%xcc, tsb_miss_itlb		! Miss
 	 mov	FAULT_CODE_ITLB, %g3
 	andcc	%g5, %g4, %g0			! Executable?
@@ -16,7 +17,6 @@
 	 nop					! Delay slot, fill me
 	stxa	%g5, [%g0] ASI_ITLB_DATA_IN	! Load TLB
 	retry					! Trap done
-	nop
 
 /* ITLB ** ICACHE line 3: 				*/
 	nop

arch/sparc64/kernel/ktlb.S

@@ -131,16 +131,8 @@ kvmap_dtlb_4v:
 	brgez,pn	%g4, kvmap_dtlb_nonlinear
 	 nop
 
-#define KERN_HIGHBITS	((_PAGE_VALID|_PAGE_SZ4MB)^0xfffff80000000000)
-#define KERN_LOWBITS	(_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W)
-
-	sethi		%uhi(KERN_HIGHBITS), %g2
-	or		%g2, %ulo(KERN_HIGHBITS), %g2
-	sllx		%g2, 32, %g2
-	or		%g2, KERN_LOWBITS, %g2
-
-#undef KERN_HIGHBITS
-#undef KERN_LOWBITS
+	sethi		%hi(kern_linear_pte_xor), %g2
+	ldx		[%g2 + %lo(kern_linear_pte_xor)], %g2
 
 	.globl		kvmap_linear_patch
 kvmap_linear_patch:

arch/sparc64/kernel/setup.c

@@ -64,12 +64,6 @@ struct screen_info screen_info = {
 	16                      /* orig-video-points */
 };
 
-/* Typing sync at the prom prompt calls the function pointed to by
- * the sync callback which I set to the following function.
- * This should sync all filesystems and return, for now it just
- * prints out pretty messages and returns.
- */
-
 void (*prom_palette)(int);
 void (*prom_keyboard)(void);
 
@@ -79,263 +73,6 @@ prom_console_write(struct console *con, const char *s, unsigned n)
 	prom_write(s, n);
 }
 
-static struct console prom_console = {
-	.name =		"prom",
-	.write =	prom_console_write,
-	.flags =	CON_CONSDEV | CON_ENABLED,
-	.index =	-1,
-};
-
-#define PROM_TRUE	-1
-#define PROM_FALSE	0
-
-/* Pretty sick eh? */
-int prom_callback(long *args)
-{
-	struct console *cons, *saved_console = NULL;
-	unsigned long flags;
-	char *cmd;
-	extern spinlock_t prom_entry_lock;
-
-	if (!args)
-		return -1;
-	if (!(cmd = (char *)args[0]))
-		return -1;
-
-	/*
-	 * The callback can be invoked on the cpu that first dropped 
-	 * into prom_cmdline after taking the serial interrupt, or on 
-	 * a slave processor that was smp_captured() if the 
-	 * administrator has done a switch-cpu inside obp. In either 
-	 * case, the cpu is marked as in-interrupt. Drop IRQ locks.
-	 */
-	irq_exit();
-
-	/* XXX Revisit the locking here someday.  This is a debugging
-	 * XXX feature so it isnt all that critical.  -DaveM
-	 */
-	local_irq_save(flags);
-
-	spin_unlock(&prom_entry_lock);
-	cons = console_drivers;
-	while (cons) {
-		unregister_console(cons);
-		cons->flags &= ~(CON_PRINTBUFFER);
-		cons->next = saved_console;
-		saved_console = cons;
-		cons = console_drivers;
-	}
-	register_console(&prom_console);
-	if (!strcmp(cmd, "sync")) {
-		prom_printf("PROM `%s' command...\n", cmd);
-		show_free_areas();
-		if (current->pid != 0) {
-			local_irq_enable();
-			sys_sync();
-			local_irq_disable();
-		}
-		args[2] = 0;
-		args[args[1] + 3] = -1;
-		prom_printf("Returning to PROM\n");
-	} else if (!strcmp(cmd, "va>tte-data")) {
-		unsigned long ctx, va;
-		unsigned long tte = 0;
-		long res = PROM_FALSE;
-
-		ctx = args[3];
-		va = args[4];
-		if (ctx) {
-			/*
-			 * Find process owning ctx, lookup mapping.
-			 */
-			struct task_struct *p;
-			struct mm_struct *mm = NULL;
-			pgd_t *pgdp;
-			pud_t *pudp;
-			pmd_t *pmdp;
-			pte_t *ptep;
-			pte_t pte;
-
-			for_each_process(p) {
-				mm = p->mm;
-				if (CTX_NRBITS(mm->context) == ctx)
-					break;
-			}
-			if (!mm ||
-			    CTX_NRBITS(mm->context) != ctx)
-				goto done;
-
-			pgdp = pgd_offset(mm, va);
-			if (pgd_none(*pgdp))
-				goto done;
-			pudp = pud_offset(pgdp, va);
-			if (pud_none(*pudp))
-				goto done;
-			pmdp = pmd_offset(pudp, va);
-			if (pmd_none(*pmdp))
-				goto done;
-
-			/* Preemption implicitly disabled by virtue of
-			 * being called from inside OBP.
-			 */
-			ptep = pte_offset_map(pmdp, va);
-			pte = *ptep;
-			if (pte_present(pte)) {
-				tte = pte_val(pte);
-				res = PROM_TRUE;
-			}
-			pte_unmap(ptep);
-			goto done;
-		}
-
-		if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
-			if (tlb_type == spitfire) {
-				extern unsigned long sparc64_kern_pri_context;
-
-				/* Spitfire Errata #32 workaround */
-				__asm__ __volatile__(
-					"stxa 	%0, [%1] %2\n\t"
-					"flush	%%g6"
-					: /* No outputs */
-					: "r" (sparc64_kern_pri_context),
-					  "r" (PRIMARY_CONTEXT),
-					  "i" (ASI_DMMU));
-			}
-
-			/*
-			 * Locked down tlb entry.
-			 */
-
-			if (tlb_type == spitfire) {
-				tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
-				res = PROM_TRUE;
-			} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
-				tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
-				res = PROM_TRUE;
-			}
-			goto done;
-		}
-
-		if (va < PGDIR_SIZE) {
-			/*
-			 * vmalloc or prom_inherited mapping.
-			 */
-			pgd_t *pgdp;
-			pud_t *pudp;
-			pmd_t *pmdp;
-			pte_t *ptep;
-			pte_t pte;
-			int error;
-
-			if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) {
-				tte = prom_virt_to_phys(va, &error);
-				if (!error)
-					res = PROM_TRUE;
-				goto done;
-			}
-			pgdp = pgd_offset_k(va);
-			if (pgd_none(*pgdp))
-				goto done;
-			pudp = pud_offset(pgdp, va);
-			if (pud_none(*pudp))
-				goto done;
-			pmdp = pmd_offset(pudp, va);
-			if (pmd_none(*pmdp))
-				goto done;
-
-			/* Preemption implicitly disabled by virtue of
-			 * being called from inside OBP.
-			 */
-			ptep = pte_offset_kernel(pmdp, va);
-			pte = *ptep;
-			if (pte_present(pte)) {
-				tte = pte_val(pte);
-				res = PROM_TRUE;
-			}
-			goto done;
-		}
-
-		if (va < PAGE_OFFSET) {
-			/*
-			 * No mappings here.
-			 */
-			goto done;
-		}
-
-		if (va & (1UL << 40)) {
-			/*
-			 * I/O page.
-			 */
-
-			tte = (__pa(va) & _PAGE_PADDR) |
-			      _PAGE_VALID | _PAGE_SZ4MB |
-			      _PAGE_E | _PAGE_P | _PAGE_W;
-			res = PROM_TRUE;
-			goto done;
-		}
-
-		/*
-		 * Normal page.
-		 */
-		tte = (__pa(va) & _PAGE_PADDR) |
-		      _PAGE_VALID | _PAGE_SZ4MB |
-		      _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W;
-		res = PROM_TRUE;
-
-	done:
-		if (res == PROM_TRUE) {
-			args[2] = 3;
-			args[args[1] + 3] = 0;
-			args[args[1] + 4] = res;
-			args[args[1] + 5] = tte;
-		} else {
-			args[2] = 2;
-			args[args[1] + 3] = 0;
-			args[args[1] + 4] = res;
-		}
-	} else if (!strcmp(cmd, ".soft1")) {
-		unsigned long tte;
-
-		tte = args[3];
-		prom_printf("%lx:\"%s%s%s%s%s\" ",
-			    (tte & _PAGE_SOFT) >> 7,
-			    tte & _PAGE_MODIFIED ? "M" : "-",
-			    tte & _PAGE_ACCESSED ? "A" : "-",
-			    tte & _PAGE_READ     ? "W" : "-",
-			    tte & _PAGE_WRITE    ? "R" : "-",
-			    tte & _PAGE_PRESENT  ? "P" : "-");
-
-		args[2] = 2;
-		args[args[1] + 3] = 0;
-		args[args[1] + 4] = PROM_TRUE;
-	} else if (!strcmp(cmd, ".soft2")) {
-		unsigned long tte;
-
-		tte = args[3];
-		prom_printf("%lx ", (tte & 0x07FC000000000000UL) >> 50);
-
-		args[2] = 2;
-		args[args[1] + 3] = 0;
-		args[args[1] + 4] = PROM_TRUE;
-	} else {
-		prom_printf("unknown PROM `%s' command...\n", cmd);
-	}
-	unregister_console(&prom_console);
-	while (saved_console) {
-		cons = saved_console;
-		saved_console = cons->next;
-		register_console(cons);
-	}
-	spin_lock(&prom_entry_lock);
-	local_irq_restore(flags);
-
-	/*
-	 * Restore in-interrupt status for a resume from obp.
-	 */
-	irq_enter();
-	return 0;
-}
-
 unsigned int boot_flags = 0;
 #define BOOTME_DEBUG  0x1
 #define BOOTME_SINGLE 0x2
@@ -483,17 +220,6 @@ char reboot_command[COMMAND_LINE_SIZE];
 
 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 
-void register_prom_callbacks(void)
-{
-	prom_setcallback(prom_callback);
-	prom_feval(": linux-va>tte-data 2 \" va>tte-data\" $callback drop ; "
-		   "' linux-va>tte-data to va>tte-data");
-	prom_feval(": linux-.soft1 1 \" .soft1\" $callback 2drop ; "
-		   "' linux-.soft1 to .soft1");
-	prom_feval(": linux-.soft2 1 \" .soft2\" $callback 2drop ; "
-		   "' linux-.soft2 to .soft2");
-}
-
 static void __init per_cpu_patch(void)
 {
 #ifdef CONFIG_SMP

arch/sparc64/kernel/sun4v_tlb_miss.S

@@ -59,7 +59,8 @@ sun4v_itlb_miss:
 	/* Load TSB tag/pte into %g2/%g3 and compare the tag.  */
 	ldda	[%g1] ASI_QUAD_LDD_PHYS, %g2
 	cmp	%g2, %g6
-	sethi	%hi(_PAGE_EXEC), %g7
+	sethi	%hi(PAGE_EXEC), %g7
+	ldx	[%g7 + %lo(PAGE_EXEC)], %g7
 	bne,a,pn %xcc, tsb_miss_page_table_walk
 	 mov	FAULT_CODE_ITLB, %g3
 	andcc	%g3, %g7, %g0

arch/sparc64/kernel/tsb.S

@@ -56,10 +56,11 @@ tsb_reload:
 	/* If it is larger than the base page size, don't
 	 * bother putting it into the TSB.
 	 */
-	srlx		%g5, 32, %g2
-	sethi		%hi(_PAGE_ALL_SZ_BITS >> 32), %g7
-	and		%g2, %g7, %g2
-	sethi		%hi(_PAGE_SZBITS >> 32), %g7
+	sethi		%hi(_PAGE_ALL_SZ_BITS), %g7
+	ldx		[%g7 + %lo(_PAGE_ALL_SZ_BITS)], %g7
+	and		%g5, %g7, %g2
+	sethi		%hi(_PAGE_SZBITS), %g7
+	ldx		[%g7 + %lo(_PAGE_SZBITS)], %g7
 	cmp		%g2, %g7
 	bne,a,pn	%xcc, tsb_tlb_reload
 	 TSB_STORE(%g1, %g0)

arch/sparc64/lib/clear_page.S

@@ -23,9 +23,6 @@
 	 * disable preemption during the clear.
 	 */
 
-#define TTE_BITS_TOP	(_PAGE_VALID | _PAGE_SZBITS)
-#define TTE_BITS_BOTTOM	(_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W)
-
 	.text
 
 	.globl		_clear_page
@@ -44,12 +41,11 @@ clear_user_page:	/* %o0=dest, %o1=vaddr */
 	sethi		%hi(PAGE_SIZE), %o4
 
 	sllx		%g2, 32, %g2
-	sethi		%uhi(TTE_BITS_TOP), %g3
+	sethi		%hi(PAGE_KERNEL_LOCKED), %g3
 
-	sllx		%g3, 32, %g3
+	ldx		[%g3 + %lo(PAGE_KERNEL_LOCKED)], %g3
 	sub		%o0, %g2, %g1		! paddr
 
-	or		%g3, TTE_BITS_BOTTOM, %g3
 	and		%o1, %o4, %o0		! vaddr D-cache alias bit
 
 	or		%g1, %g3, %g1		! TTE data

arch/sparc64/lib/copy_page.S

@@ -23,8 +23,6 @@
 	 * disable preemption during the clear.
 	 */
 
-#define TTE_BITS_TOP	(_PAGE_VALID | _PAGE_SZBITS)
-#define TTE_BITS_BOTTOM	(_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W)
 #define	DCACHE_SIZE	(PAGE_SIZE * 2)
 
 #if (PAGE_SHIFT == 13) || (PAGE_SHIFT == 19)
@@ -52,13 +50,12 @@ copy_user_page:		/* %o0=dest, %o1=src, %o2=vaddr */
 	sethi		%hi(PAGE_SIZE), %o3
 
 	sllx		%g2, 32, %g2
-	sethi		%uhi(TTE_BITS_TOP), %g3
+	sethi		%hi(PAGE_KERNEL_LOCKED), %g3
 
-	sllx		%g3, 32, %g3
+	ldx		[%g3 + %lo(PAGE_KERNEL_LOCKED)], %g3
 	sub		%o0, %g2, %g1		! dest paddr
 
 	sub		%o1, %g2, %g2		! src paddr
-	or		%g3, TTE_BITS_BOTTOM, %g3
 
 	and		%o2, %o3, %o0		! vaddr D-cache alias bit
 	or		%g1, %g3, %g1		! dest TTE data

arch/sparc64/mm/fault.c

@@ -137,7 +137,7 @@ static unsigned int get_user_insn(unsigned long tpc)
 	if (!pte_present(pte))
 		goto out;
 
-	pa  = (pte_val(pte) & _PAGE_PADDR);
+	pa  = (pte_pfn(pte) << PAGE_SHIFT);
 	pa += (tpc & ~PAGE_MASK);
 
 	/* Use phys bypass so we don't pollute dtlb/dcache. */

arch/sparc64/mm/generic.c

@@ -15,15 +15,6 @@
 #include <asm/page.h>
 #include <asm/tlbflush.h>
 
-static inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space)
-{
-	pte_t pte;
-	pte_val(pte) = (((page) | pgprot_val(prot) | _PAGE_E) &
-			~(unsigned long)_PAGE_CACHE);
-	pte_val(pte) |= (((unsigned long)space) << 32);
-	return pte;
-}
-
 /* Remap IO memory, the same way as remap_pfn_range(), but use
  * the obio memory space.
  *
@@ -48,24 +39,29 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
 		pte_t entry;
 		unsigned long curend = address + PAGE_SIZE;
 		
-		entry = mk_pte_io(offset, prot, space);
+		entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
 		if (!(address & 0xffff)) {
-			if (!(address & 0x3fffff) && !(offset & 0x3ffffe) && end >= address + 0x400000) {
-				entry = mk_pte_io(offset,
-						  __pgprot(pgprot_val (prot) | _PAGE_SZ4MB),
-						  space);
+			if (PAGE_SIZE < (4 * 1024 * 1024) &&
+			    !(address & 0x3fffff) &&
+			    !(offset & 0x3ffffe) &&
+			    end >= address + 0x400000) {
+				entry = mk_pte_io(offset, prot, space,
+						  4 * 1024 * 1024);
 				curend = address + 0x400000;
 				offset += 0x400000;
-			} else if (!(address & 0x7ffff) && !(offset & 0x7fffe) && end >= address + 0x80000) {
-				entry = mk_pte_io(offset,
-						  __pgprot(pgprot_val (prot) | _PAGE_SZ512K),
-						  space);
+			} else if (PAGE_SIZE < (512 * 1024) &&
+				   !(address & 0x7ffff) &&
+				   !(offset & 0x7fffe) &&
+				   end >= address + 0x80000) {
+				entry = mk_pte_io(offset, prot, space,
+						  512 * 1024 * 1024);
 				curend = address + 0x80000;
 				offset += 0x80000;
-			} else if (!(offset & 0xfffe) && end >= address + 0x10000) {
-				entry = mk_pte_io(offset,
-						  __pgprot(pgprot_val (prot) | _PAGE_SZ64K),
-						  space);
+			} else if (PAGE_SIZE < (64 * 1024) &&
+				   !(offset & 0xfffe) &&
+				   end >= address + 0x10000) {
+				entry = mk_pte_io(offset, prot, space,
+						  64 * 1024);
 				curend = address + 0x10000;
 				offset += 0x10000;
 			} else

arch/sparc64/mm/tsb.c

@@ -85,8 +85,7 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_bytes)
 	mm->context.tsb_nentries = tsb_bytes / sizeof(struct tsb);
 
 	base = TSBMAP_BASE;
-	tte = (_PAGE_VALID | _PAGE_L | _PAGE_CP |
-	       _PAGE_CV    | _PAGE_P | _PAGE_W);
+	tte = pgprot_val(PAGE_KERNEL_LOCKED);
 	tsb_paddr = __pa(mm->context.tsb);
 	BUG_ON(tsb_paddr & (tsb_bytes - 1UL));
 
@@ -99,55 +98,48 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_bytes)
 #ifdef DCACHE_ALIASING_POSSIBLE
 		base += (tsb_paddr & 8192);
 #endif
-		tte |= _PAGE_SZ8K;
 		page_sz = 8192;
 		break;
 
 	case 8192 << 1:
 		tsb_reg = 0x1UL;
-		tte |= _PAGE_SZ64K;
 		page_sz = 64 * 1024;
 		break;
 
 	case 8192 << 2:
 		tsb_reg = 0x2UL;
-		tte |= _PAGE_SZ64K;
 		page_sz = 64 * 1024;
 		break;
 
 	case 8192 << 3:
 		tsb_reg = 0x3UL;
-		tte |= _PAGE_SZ64K;
 		page_sz = 64 * 1024;
 		break;
 
 	case 8192 << 4:
 		tsb_reg = 0x4UL;
-		tte |= _PAGE_SZ512K;
 		page_sz = 512 * 1024;
 		break;
 
 	case 8192 << 5:
 		tsb_reg = 0x5UL;
-		tte |= _PAGE_SZ512K;
 		page_sz = 512 * 1024;
 		break;
 
 	case 8192 << 6:
 		tsb_reg = 0x6UL;
-		tte |= _PAGE_SZ512K;
 		page_sz = 512 * 1024;
 		break;
 
 	case 8192 << 7:
 		tsb_reg = 0x7UL;
-		tte |= _PAGE_SZ4MB;
 		page_sz = 4 * 1024 * 1024;
 		break;
 
 	default:
 		BUG();
 	};
+	tte |= pte_sz_bits(page_sz);
 
 	if (tlb_type == cheetah_plus || tlb_type == hypervisor) {
 		/* Physical mapping, no locked TLB entry for TSB.  */

include/asm-sparc64/pgtable.h

@@ -90,134 +90,48 @@
 
 #endif /* !(__ASSEMBLY__) */
 
-/* Spitfire/Cheetah TTE bits. */
-#define _PAGE_VALID	_AC(0x8000000000000000,UL) /* Valid TTE              */
-#define _PAGE_R		_AC(0x8000000000000000,UL) /* Keep ref bit up to date*/
-#define _PAGE_SZ4MB	_AC(0x6000000000000000,UL) /* 4MB Page               */
-#define _PAGE_SZ512K	_AC(0x4000000000000000,UL) /* 512K Page              */
-#define _PAGE_SZ64K	_AC(0x2000000000000000,UL) /* 64K Page               */
-#define _PAGE_SZ8K	_AC(0x0000000000000000,UL) /* 8K Page                */
-#define _PAGE_NFO	_AC(0x1000000000000000,UL) /* No Fault Only          */
-#define _PAGE_IE	_AC(0x0800000000000000,UL) /* Invert Endianness      */
-#define _PAGE_SOFT2	_AC(0x07FC000000000000,UL) /* Software bits, set 2   */
-#define _PAGE_RES1	_AC(0x0002000000000000,UL) /* Reserved               */
-#define _PAGE_SZ32MB	_AC(0x0001000000000000,UL) /* (Panther) 32MB page    */
-#define _PAGE_SZ256MB	_AC(0x2001000000000000,UL) /* (Panther) 256MB page   */
-#define _PAGE_SN	_AC(0x0000800000000000,UL) /* (Cheetah) Snoop        */
-#define _PAGE_RES2	_AC(0x0000780000000000,UL) /* Reserved               */
-#define _PAGE_PADDR_SF	_AC(0x000001FFFFFFE000,UL) /* (Spitfire) paddr[40:13]*/
-#define _PAGE_PADDR	_AC(0x000007FFFFFFE000,UL) /* (Cheetah) paddr[42:13] */
-#define _PAGE_SOFT	_AC(0x0000000000001F80,UL) /* Software bits          */
-#define _PAGE_L		_AC(0x0000000000000040,UL) /* Locked TTE             */
-#define _PAGE_CP	_AC(0x0000000000000020,UL) /* Cacheable in P-Cache   */
-#define _PAGE_CV	_AC(0x0000000000000010,UL) /* Cacheable in V-Cache   */
-#define _PAGE_E		_AC(0x0000000000000008,UL) /* side-Effect            */
-#define _PAGE_P		_AC(0x0000000000000004,UL) /* Privileged Page        */
-#define _PAGE_W		_AC(0x0000000000000002,UL) /* Writable               */
-#define _PAGE_G		_AC(0x0000000000000001,UL) /* Global                 */
-
-#define _PAGE_ALL_SZ_BITS	\
-	(_PAGE_SZ4MB | _PAGE_SZ512K | _PAGE_SZ64K | \
-	 _PAGE_SZ8K  | _PAGE_SZ32MB | _PAGE_SZ256MB)
-
-/* Here are the SpitFire software bits we use in the TTE's.
- *
- * WARNING: If you are going to try and start using some
- *          of the soft2 bits, you will need to make
- *          modifications to the swap entry implementation.
- *	    For example, one thing that could happen is that
- *          swp_entry_to_pte() would BUG_ON() if you tried
- *          to use one of the soft2 bits for _PAGE_FILE.
- *
- * Like other architectures, I have aliased _PAGE_FILE with
- * _PAGE_MODIFIED.  This works because _PAGE_FILE is never
- * interpreted that way unless _PAGE_PRESENT is clear.
- */
-#define _PAGE_EXEC	_AC(0x0000000000001000,UL)	/* Executable SW bit */
-#define _PAGE_MODIFIED	_AC(0x0000000000000800,UL)	/* Modified (dirty)  */
-#define _PAGE_FILE	_AC(0x0000000000000800,UL)	/* Pagecache page    */
-#define _PAGE_ACCESSED	_AC(0x0000000000000400,UL)	/* Accessed (ref'd)  */
-#define _PAGE_READ	_AC(0x0000000000000200,UL)	/* Readable SW Bit   */
-#define _PAGE_WRITE	_AC(0x0000000000000100,UL)	/* Writable SW Bit   */
-#define _PAGE_PRESENT	_AC(0x0000000000000080,UL)	/* Present           */
-
-#if PAGE_SHIFT == 13
-#define _PAGE_SZBITS	_PAGE_SZ8K
-#elif PAGE_SHIFT == 16
-#define _PAGE_SZBITS	_PAGE_SZ64K
-#elif PAGE_SHIFT == 19
-#define _PAGE_SZBITS	_PAGE_SZ512K
-#elif PAGE_SHIFT == 22
-#define _PAGE_SZBITS	_PAGE_SZ4MB
-#else
-#error Wrong PAGE_SHIFT specified
-#endif
-
-#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
-#define _PAGE_SZHUGE	_PAGE_SZ4MB
-#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
-#define _PAGE_SZHUGE	_PAGE_SZ512K
-#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
-#define _PAGE_SZHUGE	_PAGE_SZ64K
-#endif
-
-#define _PAGE_CACHE	(_PAGE_CP | _PAGE_CV)
-
-#define __DIRTY_BITS	(_PAGE_MODIFIED | _PAGE_WRITE | _PAGE_W)
-#define __ACCESS_BITS	(_PAGE_ACCESSED | _PAGE_READ | _PAGE_R)
-#define __PRIV_BITS	_PAGE_P
-
-#define PAGE_NONE	__pgprot (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_CACHE)
-
-/* Don't set the TTE _PAGE_W bit here, else the dirty bit never gets set. */
-#define PAGE_SHARED	__pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
-				  __ACCESS_BITS | _PAGE_WRITE | _PAGE_EXEC)
-
-#define PAGE_COPY	__pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
-				  __ACCESS_BITS | _PAGE_EXEC)
-
-#define PAGE_READONLY	__pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
-				  __ACCESS_BITS | _PAGE_EXEC)
-
-#define PAGE_KERNEL	__pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
-				  __PRIV_BITS | \
-				  __ACCESS_BITS | __DIRTY_BITS | _PAGE_EXEC)
-
-#define PAGE_SHARED_NOEXEC	__pgprot (_PAGE_PRESENT | _PAGE_VALID | \
-					  _PAGE_CACHE | \
-					  __ACCESS_BITS | _PAGE_WRITE)
-
-#define PAGE_COPY_NOEXEC	__pgprot (_PAGE_PRESENT | _PAGE_VALID | \
-					  _PAGE_CACHE | __ACCESS_BITS)
-
-#define PAGE_READONLY_NOEXEC	__pgprot (_PAGE_PRESENT | _PAGE_VALID | \
-					  _PAGE_CACHE | __ACCESS_BITS)
-
-#define _PFN_MASK	_PAGE_PADDR
-
-#define pg_iobits (_PAGE_VALID | _PAGE_PRESENT | __DIRTY_BITS | \
-		   __ACCESS_BITS | _PAGE_E)
-
-#define __P000	PAGE_NONE
-#define __P001	PAGE_READONLY_NOEXEC
-#define __P010	PAGE_COPY_NOEXEC
-#define __P011	PAGE_COPY_NOEXEC
-#define __P100	PAGE_READONLY
-#define __P101	PAGE_READONLY
-#define __P110	PAGE_COPY
-#define __P111	PAGE_COPY
-
-#define __S000	PAGE_NONE
-#define __S001	PAGE_READONLY_NOEXEC
-#define __S010	PAGE_SHARED_NOEXEC
-#define __S011	PAGE_SHARED_NOEXEC
-#define __S100	PAGE_READONLY
-#define __S101	PAGE_READONLY
-#define __S110	PAGE_SHARED
-#define __S111	PAGE_SHARED
+/* PTE bits which are the same in SUN4U and SUN4V format.  */
+#define _PAGE_VALID	0x8000000000000000 /* Valid TTE              */
+#define _PAGE_R	  	0x8000000000000000 /* Keep ref bit up to date*/
+
+/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
+#define __P000	__pgprot(0)
+#define __P001	__pgprot(0)
+#define __P010	__pgprot(0)
+#define __P011	__pgprot(0)
+#define __P100	__pgprot(0)
+#define __P101	__pgprot(0)
+#define __P110	__pgprot(0)
+#define __P111	__pgprot(0)
+
+#define __S000	__pgprot(0)
+#define __S001	__pgprot(0)
+#define __S010	__pgprot(0)
+#define __S011	__pgprot(0)
+#define __S100	__pgprot(0)
+#define __S101	__pgprot(0)
+#define __S110	__pgprot(0)
+#define __S111	__pgprot(0)
 
 #ifndef __ASSEMBLY__
 
+extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
+
+extern unsigned long pte_sz_bits(unsigned long size);
+
+extern pgprot_t PAGE_KERNEL;
+extern pgprot_t PAGE_KERNEL_LOCKED;
+extern pgprot_t PAGE_COPY;
+
+/* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
+extern unsigned long _PAGE_IE;
+extern unsigned long _PAGE_E;
+extern unsigned long _PAGE_CACHE;
+
+extern unsigned long pg_iobits;
+extern unsigned long _PAGE_ALL_SZ_BITS;
+extern unsigned long _PAGE_SZBITS;
+
 extern unsigned long phys_base;
 extern unsigned long pfn_base;
 
@@ -229,27 +143,12 @@ extern struct page *mem_map_zero;
  * the first physical page in the machine is at some huge physical address,
  * such as 4GB.   This is common on a partitioned E10000, for example.
  */
-
-#define pfn_pte(pfn, prot)	\
-	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot) | _PAGE_SZBITS)
+extern pte_t pfn_pte(unsigned long, pgprot_t);
 #define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))
+extern unsigned long pte_pfn(pte_t);
+#define pte_page(x) pfn_to_page(pte_pfn(x))
+extern pte_t pte_modify(pte_t, pgprot_t);
 
-#define pte_pfn(x)		((pte_val(x) & _PAGE_PADDR)>>PAGE_SHIFT)
-#define pte_page(x)		pfn_to_page(pte_pfn(x))
-
-static inline pte_t pte_modify(pte_t orig_pte, pgprot_t new_prot)
-{
-	pte_t __pte;
-	const unsigned long preserve_mask = (_PFN_MASK |
-					     _PAGE_MODIFIED | _PAGE_ACCESSED |
-					     _PAGE_CACHE | _PAGE_E |
-					     _PAGE_PRESENT | _PAGE_SZBITS);
-
-	pte_val(__pte) = (pte_val(orig_pte) & preserve_mask) |
-		(pgprot_val(new_prot) & ~preserve_mask);
-
-	return __pte;
-}
 #define pmd_set(pmdp, ptep)	\
 	(pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
 #define pud_set(pudp, pmdp)	\
@@ -259,8 +158,6 @@ static inline pte_t pte_modify(pte_t orig_pte, pgprot_t new_prot)
 #define pmd_page(pmd) 			virt_to_page((void *)__pmd_page(pmd))
 #define pud_page(pud)		\
 	((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
-#define pte_none(pte) 			(!pte_val(pte))
-#define pte_present(pte)		(pte_val(pte) & _PAGE_PRESENT)
 #define pmd_none(pmd)			(!pmd_val(pmd))
 #define pmd_bad(pmd)			(0)
 #define pmd_present(pmd)		(pmd_val(pmd) != 0U)
@@ -270,30 +167,29 @@ static inline pte_t pte_modify(pte_t orig_pte, pgprot_t new_prot)
 #define pud_present(pud)		(pud_val(pud) != 0U)
 #define pud_clear(pudp)			(pud_val(*(pudp)) = 0U)
 
+/* Same in both SUN4V and SUN4U.  */
+#define pte_none(pte) 			(!pte_val(pte))
+
+extern unsigned long pte_present(pte_t);
+
 /* The following only work if pte_present() is true.
  * Undefined behaviour if not..
  */
-#define pte_read(pte)		(pte_val(pte) & _PAGE_READ)
-#define pte_exec(pte)		(pte_val(pte) & _PAGE_EXEC)
-#define pte_write(pte)		(pte_val(pte) & _PAGE_WRITE)
-#define pte_dirty(pte)		(pte_val(pte) & _PAGE_MODIFIED)
-#define pte_young(pte)		(pte_val(pte) & _PAGE_ACCESSED)
-#define pte_wrprotect(pte)	(__pte(pte_val(pte) & ~(_PAGE_WRITE|_PAGE_W)))
-#define pte_rdprotect(pte)	\
-	(__pte(((pte_val(pte)<<1UL)>>1UL) & ~_PAGE_READ))
-#define pte_mkclean(pte)	\
-	(__pte(pte_val(pte) & ~(_PAGE_MODIFIED|_PAGE_W)))
-#define pte_mkold(pte)		\
-	(__pte(((pte_val(pte)<<1UL)>>1UL) & ~_PAGE_ACCESSED))
-
-/* Permanent address of a page. */
-#define __page_address(page)	page_address(page)
+extern unsigned long pte_read(pte_t);
+extern unsigned long pte_exec(pte_t);
+extern unsigned long pte_write(pte_t);
+extern unsigned long pte_dirty(pte_t);
+extern unsigned long pte_young(pte_t);
+extern pte_t pte_wrprotect(pte_t);
+extern pte_t pte_rdprotect(pte_t);
+extern pte_t pte_mkclean(pte_t);
+extern pte_t pte_mkold(pte_t);
 
 /* Be very careful when you change these three, they are delicate. */
-#define pte_mkyoung(pte)	(__pte(pte_val(pte) | _PAGE_ACCESSED | _PAGE_R))
-#define pte_mkwrite(pte)	(__pte(pte_val(pte) | _PAGE_WRITE))
-#define pte_mkdirty(pte)	(__pte(pte_val(pte) | _PAGE_MODIFIED | _PAGE_W))
-#define pte_mkhuge(pte)		(__pte(pte_val(pte) | _PAGE_SZHUGE))
+extern pte_t pte_mkyoung(pte_t);
+extern pte_t pte_mkwrite(pte_t);
+extern pte_t pte_mkdirty(pte_t);
+extern pte_t pte_mkhuge(pte_t);
 
 /* to find an entry in a page-table-directory. */
 #define pgd_index(address)	(((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
@@ -328,6 +224,9 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *p
 
 	/* It is more efficient to let flush_tlb_kernel_range()
 	 * handle init_mm tlb flushes.
+	 *
+	 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
+	 *             and SUN4V pte layout, so this inline test is fine.
 	 */
 	if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
 		tlb_batch_add(mm, addr, ptep, orig);
@@ -362,42 +261,23 @@ extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
 #define __swp_entry_to_pte(x)		((pte_t) { (x).val })
 
 /* File offset in PTE support. */
-#define pte_file(pte)		(pte_val(pte) & _PAGE_FILE)
+extern unsigned long pte_file(pte_t);
 #define pte_to_pgoff(pte)	(pte_val(pte) >> PAGE_SHIFT)
-#define pgoff_to_pte(off)	(__pte(((off) << PAGE_SHIFT) | _PAGE_FILE))
+extern pte_t pgoff_to_pte(unsigned long);
 #define PTE_FILE_MAX_BITS	(64UL - PAGE_SHIFT - 1UL)
 
 extern unsigned long prom_virt_to_phys(unsigned long, int *);
 
-static __inline__ unsigned long
-sun4u_get_pte (unsigned long addr)
-{
-	pgd_t *pgdp;
-	pud_t *pudp;
-	pmd_t *pmdp;
-	pte_t *ptep;
-
-	if (addr >= PAGE_OFFSET)
-		return addr & _PAGE_PADDR;
-	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) & _PAGE_PADDR;
-}
+extern unsigned long sun4u_get_pte(unsigned long);
 
-static __inline__ unsigned long
-__get_phys (unsigned long addr)
+static inline unsigned long __get_phys(unsigned long addr)
 {
-	return sun4u_get_pte (addr);
+	return sun4u_get_pte(addr);
 }
 
-static __inline__ int
-__get_iospace (unsigned long addr)
+static inline int __get_iospace(unsigned long addr)
 {
-	return ((sun4u_get_pte (addr) & 0xf0000000) >> 28);
+	return ((sun4u_get_pte(addr) & 0xf0000000) >> 28);
 }
 
 extern unsigned long *sparc64_valid_addr_bitmap;
@@ -411,9 +291,7 @@ extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 			       unsigned long size, pgprot_t prot);
 
 /* Clear virtual and physical cachability, set side-effect bit.  */
-#define pgprot_noncached(prot) \
-	(__pgprot((pgprot_val(prot) & ~(_PAGE_CP | _PAGE_CV)) | \
-	 _PAGE_E))
+extern pgprot_t pgprot_noncached(pgprot_t);
 
 /*
  * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in