2 files changed, 68 insertions, 32 deletions

diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index 81f4a8a2d34..4b39d867ac1 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -45,7 +45,7 @@
 
 #define LDST_P_EQ_U(i)	((((i) ^ ((i) >> 1)) & (1 << 23)) == 0)
 
-#define LDSTH_I_BIT(i)	(i & (1 << 22))		/* half-word immed	*/
+#define LDSTHD_I_BIT(i)	(i & (1 << 22))		/* double/half-word immed */
 #define LDM_S_BIT(i)	(i & (1 << 22))		/* write CPSR from SPSR	*/
 
 #define RN_BITS(i)	((i >> 16) & 15)	/* Rn			*/
@@ -68,6 +68,7 @@ static unsigned long ai_sys;
 static unsigned long ai_skipped;
 static unsigned long ai_half;
 static unsigned long ai_word;
+static unsigned long ai_dword;
 static unsigned long ai_multi;
 static int ai_usermode;
 
@@ -93,6 +94,8 @@ proc_alignment_read(char *page, char **start, off_t off, int count, int *eof,
 	p += sprintf(p, "Skipped:\t%lu\n", ai_skipped);
 	p += sprintf(p, "Half:\t\t%lu\n", ai_half);
 	p += sprintf(p, "Word:\t\t%lu\n", ai_word);
+	if (cpu_architecture() >= CPU_ARCH_ARMv5TE)
+		p += sprintf(p, "DWord:\t\t%lu\n", ai_dword);
 	p += sprintf(p, "Multi:\t\t%lu\n", ai_multi);
 	p += sprintf(p, "User faults:\t%i (%s)\n", ai_usermode,
 			usermode_action[ai_usermode]);
@@ -283,12 +286,6 @@ do_alignment_ldrhstrh(unsigned long addr, unsigned long instr, struct pt_regs *r
 {
 	unsigned int rd = RD_BITS(instr);
 
-	if ((instr & 0x01f00ff0) == 0x01000090)
-		goto swp;
-
-	if ((instr & 0x90) != 0x90 || (instr & 0x60) == 0)
-		goto bad;
-
 	ai_half += 1;
 
 	if (user_mode(regs))
@@ -323,10 +320,47 @@ do_alignment_ldrhstrh(unsigned long addr, unsigned long instr, struct pt_regs *r
 
  	return TYPE_LDST;
 
- swp:
-	printk(KERN_ERR "Alignment trap: not handling swp instruction\n");
- bad:
-	return TYPE_ERROR;
+ fault:
+	return TYPE_FAULT;
+}
+
+static int
+do_alignment_ldrdstrd(unsigned long addr, unsigned long instr,
+		      struct pt_regs *regs)
+{
+	unsigned int rd = RD_BITS(instr);
+
+	ai_dword += 1;
+
+	if (user_mode(regs))
+		goto user;
+
+	if ((instr & 0xf0) == 0xd0) {
+		unsigned long val;
+		get32_unaligned_check(val, addr);
+		regs->uregs[rd] = val;
+		get32_unaligned_check(val, addr+4);
+		regs->uregs[rd+1] = val;
+	} else {
+		put32_unaligned_check(regs->uregs[rd], addr);
+		put32_unaligned_check(regs->uregs[rd+1], addr+4);
+	}
+
+	return TYPE_LDST;
+
+ user:
+	if ((instr & 0xf0) == 0xd0) {
+		unsigned long val;
+		get32t_unaligned_check(val, addr);
+		regs->uregs[rd] = val;
+		get32t_unaligned_check(val, addr+4);
+		regs->uregs[rd+1] = val;
+	} else {
+		put32t_unaligned_check(regs->uregs[rd], addr);
+		put32t_unaligned_check(regs->uregs[rd+1], addr+4);
+	}
+
+	return TYPE_LDST;
 
  fault:
 	return TYPE_FAULT;
@@ -617,12 +651,20 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	regs->ARM_pc += thumb_mode(regs) ? 2 : 4;
 
 	switch (CODING_BITS(instr)) {
-	case 0x00000000:	/* ldrh or strh */
-		if (LDSTH_I_BIT(instr))
+	case 0x00000000:	/* 3.13.4 load/store instruction extensions */
+		if (LDSTHD_I_BIT(instr))
 			offset.un = (instr & 0xf00) >> 4 | (instr & 15);
 		else
 			offset.un = regs->uregs[RM_BITS(instr)];
-		handler = do_alignment_ldrhstrh;
+
+		if ((instr & 0x000000f0) == 0x000000b0 || /* LDRH, STRH */
+		    (instr & 0x001000f0) == 0x001000f0)   /* LDRSH */
+			handler = do_alignment_ldrhstrh;
+		else if ((instr & 0x001000f0) == 0x000000d0 || /* LDRD */
+			 (instr & 0x001000f0) == 0x000000f0)   /* STRD */
+			handler = do_alignment_ldrdstrd;
+		else
+			goto bad;
 		break;
 
 	case 0x04000000:	/* ldr or str immediate */
diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index 3c655c54e23..d125a3dc061 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -275,11 +275,9 @@ alloc_init_supersection(unsigned long virt, unsigned long phys, int prot)
 	int i;
 
 	for (i = 0; i < 16; i += 1) {
-		alloc_init_section(virt, phys & SUPERSECTION_MASK,
-				   prot | PMD_SECT_SUPER);
+		alloc_init_section(virt, phys, prot | PMD_SECT_SUPER);
 
 		virt += (PGDIR_SIZE / 2);
-		phys += (PGDIR_SIZE / 2);
 	}
 }
 
@@ -297,14 +295,10 @@ alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pg
 	pte_t *ptep;
 
 	if (pmd_none(*pmdp)) {
-		unsigned long pmdval;
 		ptep = alloc_bootmem_low_pages(2 * PTRS_PER_PTE *
 					       sizeof(pte_t));
 
-		pmdval = __pa(ptep) | prot_l1;
-		pmdp[0] = __pmd(pmdval);
-		pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
-		flush_pmd_entry(pmdp);
+		__pmd_populate(pmdp, __pa(ptep) | prot_l1);
 	}
 	ptep = pte_offset_kernel(pmdp, virt);
 
@@ -459,7 +453,7 @@ static void __init build_mem_type_table(void)
 
 	for (i = 0; i < 16; i++) {
 		unsigned long v = pgprot_val(protection_map[i]);
-		v &= (~(PTE_BUFFERABLE|PTE_CACHEABLE)) | user_pgprot;
+		v = (v & ~(PTE_BUFFERABLE|PTE_CACHEABLE)) | user_pgprot;
 		protection_map[i] = __pgprot(v);
 	}
 
@@ -583,23 +577,23 @@ static void __init create_mapping(struct map_desc *md)
  */
 void setup_mm_for_reboot(char mode)
 {
-	unsigned long pmdval;
+	unsigned long base_pmdval;
 	pgd_t *pgd;
-	pmd_t *pmd;
 	int i;
-	int cpu_arch = cpu_architecture();
 
 	if (current->mm && current->mm->pgd)
 		pgd = current->mm->pgd;
 	else
 		pgd = init_mm.pgd;
 
-	for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++) {
-		pmdval = (i << PGDIR_SHIFT) |
-			 PMD_SECT_AP_WRITE | PMD_SECT_AP_READ |
-			 PMD_TYPE_SECT;
-		if (cpu_arch <= CPU_ARCH_ARMv5TEJ)
-			pmdval |= PMD_BIT4;
+	base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT;
+	if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ)
+		base_pmdval |= PMD_BIT4;
+
+	for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) {
+		unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval;
+		pmd_t *pmd;
+
 		pmd = pmd_off(pgd, i << PGDIR_SHIFT);
 		pmd[0] = __pmd(pmdval);
 		pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1)));