Merge ../linus

6 files changed, 24 insertions, 91 deletions

diff --git a/arch/ppc/mm/fault.c b/arch/ppc/mm/fault.c
index 0217188ef46..8e08ca32531 100644
--- a/arch/ppc/mm/fault.c
+++ b/arch/ppc/mm/fault.c
@@ -202,6 +202,7 @@ good_area:
 	/* an exec  - 4xx/Book-E allows for per-page execute permission */
 	} else if (TRAP(regs) == 0x400) {
 		pte_t *ptep;
+		pmd_t *pmdp;
 
 #if 0
 		/* It would be nice to actually enforce the VM execute
@@ -215,21 +216,24 @@ good_area:
 		/* Since 4xx/Book-E supports per-page execute permission,
 		 * we lazily flush dcache to icache. */
 		ptep = NULL;
-		if (get_pteptr(mm, address, &ptep) && pte_present(*ptep)) {
-			struct page *page = pte_page(*ptep);
-
-			if (! test_bit(PG_arch_1, &page->flags)) {
-				flush_dcache_icache_page(page);
-				set_bit(PG_arch_1, &page->flags);
+		if (get_pteptr(mm, address, &ptep, &pmdp)) {
+			spinlock_t *ptl = pte_lockptr(mm, pmdp);
+			spin_lock(ptl);
+			if (pte_present(*ptep)) {
+				struct page *page = pte_page(*ptep);
+
+				if (!test_bit(PG_arch_1, &page->flags)) {
+					flush_dcache_icache_page(page);
+					set_bit(PG_arch_1, &page->flags);
+				}
+				pte_update(ptep, 0, _PAGE_HWEXEC);
+				_tlbie(address);
+				pte_unmap_unlock(ptep, ptl);
+				up_read(&mm->mmap_sem);
+				return 0;
 			}
-			pte_update(ptep, 0, _PAGE_HWEXEC);
-			_tlbie(address);
-			pte_unmap(ptep);
-			up_read(&mm->mmap_sem);
-			return 0;
+			pte_unmap_unlock(ptep, ptl);
 		}
-		if (ptep != NULL)
-			pte_unmap(ptep);
 #endif
 	/* a read */
 	} else {
diff --git a/arch/ppc/mm/hashtable.S b/arch/ppc/mm/hashtable.S
index f09fa88db35..31d0a924317 100644
--- a/arch/ppc/mm/hashtable.S
+++ b/arch/ppc/mm/hashtable.S
@@ -74,12 +74,6 @@ _GLOBAL(hash_page_sync)
  */
 	.text
 _GLOBAL(hash_page)
-#ifdef CONFIG_PPC64BRIDGE
-	mfmsr	r0
-	clrldi	r0,r0,1		/* make sure it's in 32-bit mode */
-	MTMSRD(r0)
-	isync
-#endif
 	tophys(r7,0)			/* gets -KERNELBASE into r7 */
 #ifdef CONFIG_SMP
 	addis	r8,r7,mmu_hash_lock@h
@@ -303,7 +297,6 @@ Hash_base = 0xc0180000
 Hash_bits = 12				/* e.g. 256kB hash table */
 Hash_msk = (((1 << Hash_bits) - 1) * 64)
 
-#ifndef CONFIG_PPC64BRIDGE
 /* defines for the PTE format for 32-bit PPCs */
 #define PTE_SIZE	8
 #define PTEG_SIZE	64
@@ -317,21 +310,6 @@ Hash_msk = (((1 << Hash_bits) - 1) * 64)
 #define SET_V(r)	oris r,r,PTE_V@h
 #define CLR_V(r,t)	rlwinm r,r,0,1,31
 
-#else
-/* defines for the PTE format for 64-bit PPCs */
-#define PTE_SIZE	16
-#define PTEG_SIZE	128
-#define LG_PTEG_SIZE	7
-#define LDPTEu		ldu
-#define STPTE		std
-#define CMPPTE		cmpd
-#define PTE_H		2
-#define PTE_V		1
-#define TST_V(r)	andi. r,r,PTE_V
-#define SET_V(r)	ori r,r,PTE_V
-#define CLR_V(r,t)	li t,PTE_V; andc r,r,t
-#endif /* CONFIG_PPC64BRIDGE */
-
 #define HASH_LEFT	31-(LG_PTEG_SIZE+Hash_bits-1)
 #define HASH_RIGHT	31-LG_PTEG_SIZE
 
@@ -349,14 +327,8 @@ BEGIN_FTR_SECTION
 END_FTR_SECTION_IFSET(CPU_FTR_NEED_COHERENT)
 
 	/* Construct the high word of the PPC-style PTE (r5) */
-#ifndef CONFIG_PPC64BRIDGE
 	rlwinm	r5,r3,7,1,24		/* put VSID in 0x7fffff80 bits */
 	rlwimi	r5,r4,10,26,31		/* put in API (abbrev page index) */
-#else /* CONFIG_PPC64BRIDGE */
-	clrlwi	r3,r3,8			/* reduce vsid to 24 bits */
-	sldi	r5,r3,12		/* shift vsid into position */
-	rlwimi	r5,r4,16,20,24		/* put in API (abbrev page index) */
-#endif /* CONFIG_PPC64BRIDGE */
 	SET_V(r5)			/* set V (valid) bit */
 
 	/* Get the address of the primary PTE group in the hash table (r3) */
@@ -540,14 +512,8 @@ _GLOBAL(flush_hash_pages)
 	add	r3,r3,r0		/* note code below trims to 24 bits */
 
 	/* Construct the high word of the PPC-style PTE (r11) */
-#ifndef CONFIG_PPC64BRIDGE
 	rlwinm	r11,r3,7,1,24		/* put VSID in 0x7fffff80 bits */
 	rlwimi	r11,r4,10,26,31		/* put in API (abbrev page index) */
-#else /* CONFIG_PPC64BRIDGE */
-	clrlwi	r3,r3,8			/* reduce vsid to 24 bits */
-	sldi	r11,r3,12		/* shift vsid into position */
-	rlwimi	r11,r4,16,20,24		/* put in API (abbrev page index) */
-#endif /* CONFIG_PPC64BRIDGE */
 	SET_V(r11)			/* set V (valid) bit */
 
 #ifdef CONFIG_SMP
diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
index cb1c294fb93..386e000bcb7 100644
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c
@@ -412,14 +412,6 @@ void __init mem_init(void)
 	}
 #endif /* CONFIG_BLK_DEV_INITRD */
 
-#ifdef CONFIG_PPC_OF
-	/* mark the RTAS pages as reserved */
-	if ( rtas_data )
-		for (addr = (ulong)__va(rtas_data);
-		     addr < PAGE_ALIGN((ulong)__va(rtas_data)+rtas_size) ;
-		     addr += PAGE_SIZE)
-			SetPageReserved(virt_to_page(addr));
-#endif
 	for (addr = PAGE_OFFSET; addr < (unsigned long)high_memory;
 	     addr += PAGE_SIZE) {
 		if (!PageReserved(virt_to_page(addr)))
@@ -494,11 +486,6 @@ set_phys_avail(unsigned long total_memory)
 				  initrd_end - initrd_start, 1);
 	}
 #endif /* CONFIG_BLK_DEV_INITRD */
-#ifdef CONFIG_PPC_OF
-	/* remove the RTAS pages from the available memory */
-	if (rtas_data)
-		mem_pieces_remove(&phys_avail, rtas_data, rtas_size, 1);
-#endif
 }
 
 /* Mark some memory as reserved by removing it from phys_avail. */
diff --git a/arch/ppc/mm/mmu_context.c b/arch/ppc/mm/mmu_context.c
index a8816e0f6a8..b4a4b3f02a1 100644
--- a/arch/ppc/mm/mmu_context.c
+++ b/arch/ppc/mm/mmu_context.c
@@ -2,7 +2,7 @@
  * This file contains the routines for handling the MMU on those
  * PowerPC implementations where the MMU substantially follows the
  * architecture specification.  This includes the 6xx, 7xx, 7xxx,
- * 8260, and POWER3 implementations but excludes the 8xx and 4xx.
+ * 8260, and 83xx implementations but excludes the 8xx and 4xx.
  *  -- paulus
  *
  *  Derived from arch/ppc/mm/init.c:
diff --git a/arch/ppc/mm/pgtable.c b/arch/ppc/mm/pgtable.c
index 6ea9185fd12..706bca8eb14 100644
--- a/arch/ppc/mm/pgtable.c
+++ b/arch/ppc/mm/pgtable.c
@@ -39,7 +39,7 @@ unsigned long ioremap_base;
 unsigned long ioremap_bot;
 int io_bat_index;
 
-#if defined(CONFIG_6xx) || defined(CONFIG_POWER3)
+#if defined(CONFIG_6xx)
 #define HAVE_BATS	1
 #endif
 
@@ -368,7 +368,7 @@ void __init io_block_mapping(unsigned long virt, phys_addr_t phys,
  * the PTE pointer is unmodified if PTE is not found.
  */
 int
-get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep)
+get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, pmd_t **pmdp)
 {
         pgd_t	*pgd;
         pmd_t	*pmd;
@@ -383,6 +383,8 @@ get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep)
                         if (pte) {
 				retval = 1;
 				*ptep = pte;
+				if (pmdp)
+					*pmdp = pmd;
 				/* XXX caller needs to do pte_unmap, yuck */
                         }
                 }
@@ -420,7 +422,7 @@ unsigned long iopa(unsigned long addr)
 		mm = &init_mm;
 
 	pa = 0;
-	if (get_pteptr(mm, addr, &pte)) {
+	if (get_pteptr(mm, addr, &pte, NULL)) {
 		pa = (pte_val(*pte) & PAGE_MASK) | (addr & ~PAGE_MASK);
 		pte_unmap(pte);
 	}
diff --git a/arch/ppc/mm/ppc_mmu.c b/arch/ppc/mm/ppc_mmu.c
index 9a381ed5eb2..25bb6f3347c 100644
--- a/arch/ppc/mm/ppc_mmu.c
+++ b/arch/ppc/mm/ppc_mmu.c
@@ -2,7 +2,7 @@
  * This file contains the routines for handling the MMU on those
  * PowerPC implementations where the MMU substantially follows the
  * architecture specification.  This includes the 6xx, 7xx, 7xxx,
- * 8260, and POWER3 implementations but excludes the 8xx and 4xx.
+ * 8260, and 83xx implementations but excludes the 8xx and 4xx.
  *  -- paulus
  *
  *  Derived from arch/ppc/mm/init.c:
@@ -42,11 +42,7 @@ unsigned long _SDR1;
 
 union ubat {			/* BAT register values to be loaded */
 	BAT	bat;
-#ifdef CONFIG_PPC64BRIDGE
-	u64	word[2];
-#else
 	u32	word[2];
-#endif
 } BATS[4][2];			/* 4 pairs of IBAT, DBAT */
 
 struct batrange {		/* stores address ranges mapped by BATs */
@@ -83,9 +79,6 @@ unsigned long p_mapped_by_bats(unsigned long pa)
 
 unsigned long __init mmu_mapin_ram(void)
 {
-#ifdef CONFIG_POWER4
-	return 0;
-#else
 	unsigned long tot, bl, done;
 	unsigned long max_size = (256<<20);
 	unsigned long align;
@@ -122,7 +115,6 @@ unsigned long __init mmu_mapin_ram(void)
 	}
 
 	return done;
-#endif
 }
 
 /*
@@ -205,27 +197,10 @@ void __init MMU_init_hw(void)
 
 	if ( ppc_md.progress ) ppc_md.progress("hash:enter", 0x105);
 
-#ifdef CONFIG_PPC64BRIDGE
-#define LG_HPTEG_SIZE	7		/* 128 bytes per HPTEG */
-#define SDR1_LOW_BITS	(lg_n_hpteg - 11)
-#define MIN_N_HPTEG	2048		/* min 256kB hash table */
-#else
 #define LG_HPTEG_SIZE	6		/* 64 bytes per HPTEG */
 #define SDR1_LOW_BITS	((n_hpteg - 1) >> 10)
 #define MIN_N_HPTEG	1024		/* min 64kB hash table */
-#endif
-
-#ifdef CONFIG_POWER4
-	/* The hash table has already been allocated and initialized
-	   in prom.c */
-	n_hpteg = Hash_size >> LG_HPTEG_SIZE;
-	lg_n_hpteg = __ilog2(n_hpteg);
-
-	/* Remove the hash table from the available memory */
-	if (Hash)
-		reserve_phys_mem(__pa(Hash), Hash_size);
 
-#else /* CONFIG_POWER4 */
 	/*
 	 * Allow 1 HPTE (1/8 HPTEG) for each page of memory.
 	 * This is less than the recommended amount, but then
@@ -248,7 +223,6 @@ void __init MMU_init_hw(void)
 	Hash = mem_pieces_find(Hash_size, Hash_size);
 	cacheable_memzero(Hash, Hash_size);
 	_SDR1 = __pa(Hash) | SDR1_LOW_BITS;
-#endif /* CONFIG_POWER4 */
 
 	Hash_end = (PTE *) ((unsigned long)Hash + Hash_size);