Merge branch 'devel-stable' into for-next

Conflicts:
	arch/arm/Makefile
	arch/arm/include/asm/glue-proc.h

30 files changed, 679 insertions, 42 deletions

diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 7c1bfc0aea0c..accefe099182 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -80,15 +80,6 @@ static inline u32 arch_timer_get_cntfrq(void)
         return val;
 }
 
-static inline u64 arch_counter_get_cntpct(void)
-{
-        u64 cval;
-
-        isb();
-        asm volatile("mrrc p15, 0, %Q0, %R0, c14" : "=r" (cval));
-        return cval;
-}
-
 static inline u64 arch_counter_get_cntvct(void)
 {
         u64 cval;
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h
index 05ee9eebad6b..a5fef710af32 100644
--- a/arch/arm/include/asm/assembler.h
+++ b/arch/arm/include/asm/assembler.h
@@ -136,7 +136,11 @@
  * assumes FIQs are enabled, and that the processor is in SVC mode.
  */
         .macro  save_and_disable_irqs, oldcpsr
+#ifdef CONFIG_CPU_V7M
+        mrs     \oldcpsr, primask
+#else
         mrs     \oldcpsr, cpsr
+#endif
         disable_irq
         .endm
 
@@ -150,7 +154,11 @@
  * guarantee that this will preserve the flags.
  */
         .macro  restore_irqs_notrace, oldcpsr
+#ifdef CONFIG_CPU_V7M
+        msr     primask, \oldcpsr
+#else
         msr     cpsr_c, \oldcpsr
+#endif
         .endm
 
         .macro restore_irqs, oldcpsr
@@ -229,7 +237,14 @@
 #endif
         .endm
 
-#ifdef CONFIG_THUMB2_KERNEL
+#if defined(CONFIG_CPU_V7M)
+        /*
+         * setmode is used to assert to be in svc mode during boot. For v7-M
+         * this is done in __v7m_setup, so setmode can be empty here.
+         */
+        .macro  setmode, mode, reg
+        .endm
+#elif defined(CONFIG_THUMB2_KERNEL)
         .macro  setmode, mode, reg
         mov     \reg, #\mode
         msr     cpsr_c, \reg
diff --git a/arch/arm/include/asm/cp15.h b/arch/arm/include/asm/cp15.h
index 1f3262e99d81..a524a23d8627 100644
--- a/arch/arm/include/asm/cp15.h
+++ b/arch/arm/include/asm/cp15.h
@@ -23,6 +23,11 @@
 #define CR_RR   (1 << 14)       /* Round Robin cache replacement        */
 #define CR_L4   (1 << 15)       /* LDR pc can set T bit                 */
 #define CR_DT   (1 << 16)
+#ifdef CONFIG_MMU
+#define CR_HA   (1 << 17)       /* Hardware management of Access Flag   */
+#else
+#define CR_BR   (1 << 17)       /* MPU Background region enable (PMSA)  */
+#endif
 #define CR_IT   (1 << 18)
 #define CR_ST   (1 << 19)
 #define CR_FI   (1 << 21)       /* Fast interrupt (lower latency mode)  */
diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index dba62cb1ad08..8c25dc4e9851 100644
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -8,8 +8,25 @@
 #define CPUID_CACHETYPE 1
 #define CPUID_TCM       2
 #define CPUID_TLBTYPE   3
+#define CPUID_MPUIR     4
 #define CPUID_MPIDR     5
 
+#ifdef CONFIG_CPU_V7M
+#define CPUID_EXT_PFR0  0x40
+#define CPUID_EXT_PFR1  0x44
+#define CPUID_EXT_DFR0  0x48
+#define CPUID_EXT_AFR0  0x4c
+#define CPUID_EXT_MMFR0 0x50
+#define CPUID_EXT_MMFR1 0x54
+#define CPUID_EXT_MMFR2 0x58
+#define CPUID_EXT_MMFR3 0x5c
+#define CPUID_EXT_ISAR0 0x60
+#define CPUID_EXT_ISAR1 0x64
+#define CPUID_EXT_ISAR2 0x68
+#define CPUID_EXT_ISAR3 0x6c
+#define CPUID_EXT_ISAR4 0x70
+#define CPUID_EXT_ISAR5 0x74
+#else
 #define CPUID_EXT_PFR0  "c1, 0"
 #define CPUID_EXT_PFR1  "c1, 1"
 #define CPUID_EXT_DFR0  "c1, 2"
@@ -24,6 +41,7 @@
 #define CPUID_EXT_ISAR3 "c2, 3"
 #define CPUID_EXT_ISAR4 "c2, 4"
 #define CPUID_EXT_ISAR5 "c2, 5"
+#endif
 
 #define MPIDR_SMP_BITMASK (0x3 << 30)
 #define MPIDR_SMP_VALUE (0x2 << 30)
@@ -81,7 +99,23 @@ extern unsigned int processor_id;
                 __val;                                                  \
         })
 
-#else /* ifdef CONFIG_CPU_CP15 */
+#elif defined(CONFIG_CPU_V7M)
+
+#include <asm/io.h>
+#include <asm/v7m.h>
+
+#define read_cpuid(reg)                                                 \
+        ({                                                              \
+                WARN_ON_ONCE(1);                                        \
+                0;                                                      \
+        })
+
+static inline unsigned int __attribute_const__ read_cpuid_ext(unsigned offset)
+{
+        return readl(BASEADDR_V7M_SCB + offset);
+}
+
+#else /* ifdef CONFIG_CPU_CP15 / elif defined (CONFIG_CPU_V7M) */
 
 /*
  * read_cpuid and read_cpuid_ext should only ever be called on machines that
@@ -108,7 +142,14 @@ static inline unsigned int __attribute_const__ read_cpuid_id(void)
         return read_cpuid(CPUID_ID);
 }
 
-#else /* ifdef CONFIG_CPU_CP15 */
+#elif defined(CONFIG_CPU_V7M)
+
+static inline unsigned int __attribute_const__ read_cpuid_id(void)
+{
+        return readl(BASEADDR_V7M_SCB + V7M_SCB_CPUID);
+}
+
+#else /* ifdef CONFIG_CPU_CP15 / elif defined(CONFIG_CPU_V7M) */
 
 static inline unsigned int __attribute_const__ read_cpuid_id(void)
 {
diff --git a/arch/arm/include/asm/glue-cache.h b/arch/arm/include/asm/glue-cache.h
index ea289e1435e7..c81adc08b3fb 100644
--- a/arch/arm/include/asm/glue-cache.h
+++ b/arch/arm/include/asm/glue-cache.h
@@ -117,10 +117,37 @@
 # endif
 #endif
 
+#if defined(CONFIG_CPU_V7M)
+# ifdef _CACHE
+#  define MULTI_CACHE 1
+# else
+#  define _CACHE nop
+# endif
+#endif
+
 #if !defined(_CACHE) && !defined(MULTI_CACHE)
 #error Unknown cache maintenance model
 #endif
 
+#ifndef __ASSEMBLER__
+extern inline void nop_flush_icache_all(void) { }
+extern inline void nop_flush_kern_cache_all(void) { }
+extern inline void nop_flush_kern_cache_louis(void) { }
+extern inline void nop_flush_user_cache_all(void) { }
+extern inline void nop_flush_user_cache_range(unsigned long a,
+                unsigned long b, unsigned int c) { }
+
+extern inline void nop_coherent_kern_range(unsigned long a, unsigned long b) { }
+extern inline int nop_coherent_user_range(unsigned long a,
+                unsigned long b) { return 0; }
+extern inline void nop_flush_kern_dcache_area(void *a, size_t s) { }
+
+extern inline void nop_dma_flush_range(const void *a, const void *b) { }
+
+extern inline void nop_dma_map_area(const void *s, size_t l, int f) { }
+extern inline void nop_dma_unmap_area(const void *s, size_t l, int f) { }
+#endif
+
 #ifndef MULTI_CACHE
 #define __cpuc_flush_icache_all         __glue(_CACHE,_flush_icache_all)
 #define __cpuc_flush_kern_all           __glue(_CACHE,_flush_kern_cache_all)
diff --git a/arch/arm/include/asm/glue-df.h b/arch/arm/include/asm/glue-df.h
index b6e9f2c108b5..6b70f1b46a6e 100644
--- a/arch/arm/include/asm/glue-df.h
+++ b/arch/arm/include/asm/glue-df.h
@@ -95,6 +95,14 @@
 # endif
 #endif
 
+#ifdef CONFIG_CPU_ABRT_NOMMU
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
+# else
+#  define CPU_DABORT_HANDLER nommu_early_abort
+# endif
+#endif
+
 #ifndef CPU_DABORT_HANDLER
 #error Unknown data abort handler type
 #endif
diff --git a/arch/arm/include/asm/glue-proc.h b/arch/arm/include/asm/glue-proc.h
index 8017e94acc5e..74a8b84f3cb1 100644
--- a/arch/arm/include/asm/glue-proc.h
+++ b/arch/arm/include/asm/glue-proc.h
@@ -230,6 +230,15 @@
 # endif
 #endif
 
+#ifdef CONFIG_CPU_V7M
+# ifdef CPU_NAME
+#  undef  MULTI_CPU
+#  define MULTI_CPU
+# else
+#  define CPU_NAME cpu_v7m
+# endif
+#endif
+
 #ifdef CONFIG_CPU_PJ4B
 # ifdef CPU_NAME
 #  undef  MULTI_CPU
diff --git a/arch/arm/include/asm/hugetlb-3level.h b/arch/arm/include/asm/hugetlb-3level.h
new file mode 100644
index 000000000000..d4014fbe5ea3
--- /dev/null
+++ b/arch/arm/include/asm/hugetlb-3level.h
@@ -0,0 +1,71 @@
+/*
+ * arch/arm/include/asm/hugetlb-3level.h
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * Based on arch/x86/include/asm/hugetlb.h.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _ASM_ARM_HUGETLB_3LEVEL_H
+#define _ASM_ARM_HUGETLB_3LEVEL_H
+
+
+/*
+ * If our huge pte is non-zero then mark the valid bit.
+ * This allows pte_present(huge_ptep_get(ptep)) to return true for non-zero
+ * ptes.
+ * (The valid bit is automatically cleared by set_pte_at for PROT_NONE ptes).
+ */
+static inline pte_t huge_ptep_get(pte_t *ptep)
+{
+        pte_t retval = *ptep;
+        if (pte_val(retval))
+                pte_val(retval) |= L_PTE_VALID;
+        return retval;
+}
+
+static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
+                                   pte_t *ptep, pte_t pte)
+{
+        set_pte_at(mm, addr, ptep, pte);
+}
+
+static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
+                                         unsigned long addr, pte_t *ptep)
+{
+        ptep_clear_flush(vma, addr, ptep);
+}
+
+static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
+                                           unsigned long addr, pte_t *ptep)
+{
+        ptep_set_wrprotect(mm, addr, ptep);
+}
+
+static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
+                                            unsigned long addr, pte_t *ptep)
+{
+        return ptep_get_and_clear(mm, addr, ptep);
+}
+
+static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
+                                             unsigned long addr, pte_t *ptep,
+                                             pte_t pte, int dirty)
+{
+        return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
+}
+
+#endif /* _ASM_ARM_HUGETLB_3LEVEL_H */
diff --git a/arch/arm/include/asm/hugetlb.h b/arch/arm/include/asm/hugetlb.h
new file mode 100644
index 000000000000..1f1b1cd112f3
--- /dev/null
+++ b/arch/arm/include/asm/hugetlb.h
@@ -0,0 +1,84 @@
+/*
+ * arch/arm/include/asm/hugetlb.h
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * Based on arch/x86/include/asm/hugetlb.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _ASM_ARM_HUGETLB_H
+#define _ASM_ARM_HUGETLB_H
+
+#include <asm/page.h>
+#include <asm-generic/hugetlb.h>
+
+#include <asm/hugetlb-3level.h>
+
+static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
+                                          unsigned long addr, unsigned long end,
+                                          unsigned long floor,
+                                          unsigned long ceiling)
+{
+        free_pgd_range(tlb, addr, end, floor, ceiling);
+}
+
+
+static inline int is_hugepage_only_range(struct mm_struct *mm,
+                                         unsigned long addr, unsigned long len)
+{
+        return 0;
+}
+
+static inline int prepare_hugepage_range(struct file *file,
+                                         unsigned long addr, unsigned long len)
+{
+        struct hstate *h = hstate_file(file);
+        if (len & ~huge_page_mask(h))
+                return -EINVAL;
+        if (addr & ~huge_page_mask(h))
+                return -EINVAL;
+        return 0;
+}
+
+static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
+{
+}
+
+static inline int huge_pte_none(pte_t pte)
+{
+        return pte_none(pte);
+}
+
+static inline pte_t huge_pte_wrprotect(pte_t pte)
+{
+        return pte_wrprotect(pte);
+}
+
+static inline int arch_prepare_hugepage(struct page *page)
+{
+        return 0;
+}
+
+static inline void arch_release_hugepage(struct page *page)
+{
+}
+
+static inline void arch_clear_hugepage_flags(struct page *page)
+{
+        clear_bit(PG_dcache_clean, &page->flags);
+}
+
+#endif /* _ASM_ARM_HUGETLB_H */
diff --git a/arch/arm/include/asm/irqflags.h b/arch/arm/include/asm/irqflags.h
index 1e6cca55c750..3b763d6652a0 100644
--- a/arch/arm/include/asm/irqflags.h
+++ b/arch/arm/include/asm/irqflags.h
@@ -8,6 +8,16 @@
 /*
  * CPU interrupt mask handling.
  */
+#ifdef CONFIG_CPU_V7M
+#define IRQMASK_REG_NAME_R "primask"
+#define IRQMASK_REG_NAME_W "primask"
+#define IRQMASK_I_BIT   1
+#else
+#define IRQMASK_REG_NAME_R "cpsr"
+#define IRQMASK_REG_NAME_W "cpsr_c"
+#define IRQMASK_I_BIT   PSR_I_BIT
+#endif
+
 #if __LINUX_ARM_ARCH__ >= 6
 
 static inline unsigned long arch_local_irq_save(void)
@@ -15,7 +25,7 @@ static inline unsigned long arch_local_irq_save(void)
         unsigned long flags;
 
         asm volatile(
-                "       mrs     %0, cpsr        @ arch_local_irq_save\n"
+                "       mrs     %0, " IRQMASK_REG_NAME_R "      @ arch_local_irq_save\n"
                 "       cpsid   i"
                 : "=r" (flags) : : "memory", "cc");
         return flags;
@@ -129,7 +139,7 @@ static inline unsigned long arch_local_save_flags(void)
 {
         unsigned long flags;
         asm volatile(
-                "       mrs     %0, cpsr        @ local_save_flags"
+                "       mrs     %0, " IRQMASK_REG_NAME_R "      @ local_save_flags"
                 : "=r" (flags) : : "memory", "cc");
         return flags;
 }
@@ -140,7 +150,7 @@ static inline unsigned long arch_local_save_flags(void)
 static inline void arch_local_irq_restore(unsigned long flags)
 {
         asm volatile(
-                "       msr     cpsr_c, %0      @ local_irq_restore"
+                "       msr     " IRQMASK_REG_NAME_W ", %0      @ local_irq_restore"
                 :
                 : "r" (flags)
                 : "memory", "cc");
@@ -148,8 +158,8 @@ static inline void arch_local_irq_restore(unsigned long flags)
 
 static inline int arch_irqs_disabled_flags(unsigned long flags)
 {
-        return flags & PSR_I_BIT;
+        return flags & IRQMASK_I_BIT;
 }
 
-#endif
-#endif
+#endif /* ifdef __KERNEL__ */
+#endif /* ifndef __ASM_ARM_IRQFLAGS_H */
diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 308ad7d6f98b..75bf07910b81 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -8,6 +8,8 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/types.h>
+
 #ifndef __ASSEMBLY__
 
 struct tag;
@@ -16,8 +18,10 @@ struct pt_regs;
 struct smp_operations;
 #ifdef CONFIG_SMP
 #define smp_ops(ops) (&(ops))
+#define smp_init_ops(ops) (&(ops))
 #else
 #define smp_ops(ops) (struct smp_operations *)NULL
+#define smp_init_ops(ops) (bool (*)(void))NULL
 #endif
 
 struct machine_desc {
@@ -41,6 +45,7 @@ struct machine_desc {
         unsigned char           reserve_lp2 :1; /* never has lp2        */
         char                    restart_mode;   /* default restart mode */
         struct smp_operations   *smp;           /* SMP operations       */
+        bool                    (*smp_init)(void);
         void                    (*fixup)(struct tag *, char **,
                                          struct meminfo *);
         void                    (*reserve)(void);/* reserve mem blocks  */
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 57870ab313c5..584786f740f9 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -18,6 +18,8 @@
 #include <linux/types.h>
 #include <linux/sizes.h>
 
+#include <asm/cache.h>
+
 #ifdef CONFIG_NEED_MACH_MEMORY_H
 #include <mach/memory.h>
 #endif
@@ -141,6 +143,20 @@
 #define page_to_phys(page)      (__pfn_to_phys(page_to_pfn(page)))
 #define phys_to_page(phys)      (pfn_to_page(__phys_to_pfn(phys)))
 
+/*
+ * Minimum guaranted alignment in pgd_alloc().  The page table pointers passed
+ * around in head.S and proc-*.S are shifted by this amount, in order to
+ * leave spare high bits for systems with physical address extension.  This
+ * does not fully accomodate the 40-bit addressing capability of ARM LPAE, but
+ * gives us about 38-bits or so.
+ */
+#ifdef CONFIG_ARM_LPAE
+#define ARCH_PGD_SHIFT          L1_CACHE_SHIFT
+#else
+#define ARCH_PGD_SHIFT          0
+#endif
+#define ARCH_PGD_MASK           ((1 << ARCH_PGD_SHIFT) - 1)
+
 #ifndef __ASSEMBLY__
 
 /*
@@ -207,7 +223,7 @@ static inline unsigned long __phys_to_virt(unsigned long x)
  * direct-mapped view.  We assume this is the first page
  * of RAM in the mem_map as well.
  */
-#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT)
+#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
 
 /*
  * These are *only* valid on the kernel direct mapped RAM memory.
diff --git a/arch/arm/include/asm/mpu.h b/arch/arm/include/asm/mpu.h
new file mode 100644
index 000000000000..c3247cc2fe08
--- /dev/null
+++ b/arch/arm/include/asm/mpu.h
@@ -0,0 +1,76 @@
+#ifndef __ARM_MPU_H
+#define __ARM_MPU_H
+
+#ifdef CONFIG_ARM_MPU
+
+/* MPUIR layout */
+#define MPUIR_nU                1
+#define MPUIR_DREGION           8
+#define MPUIR_IREGION           16
+#define MPUIR_DREGION_SZMASK    (0xFF << MPUIR_DREGION)
+#define MPUIR_IREGION_SZMASK    (0xFF << MPUIR_IREGION)
+
+/* ID_MMFR0 data relevant to MPU */
+#define MMFR0_PMSA              (0xF << 4)
+#define MMFR0_PMSAv7            (3 << 4)
+
+/* MPU D/I Size Register fields */
+#define MPU_RSR_SZ              1
+#define MPU_RSR_EN              0
+
+/* The D/I RSR value for an enabled region spanning the whole of memory */
+#define MPU_RSR_ALL_MEM         63
+
+/* Individual bits in the DR/IR ACR */
+#define MPU_ACR_XN              (1 << 12)
+#define MPU_ACR_SHARED          (1 << 2)
+
+/* C, B and TEX[2:0] bits only have semantic meanings when grouped */
+#define MPU_RGN_CACHEABLE       0xB
+#define MPU_RGN_SHARED_CACHEABLE (MPU_RGN_CACHEABLE | MPU_ACR_SHARED)
+#define MPU_RGN_STRONGLY_ORDERED 0
+
+/* Main region should only be shared for SMP */
+#ifdef CONFIG_SMP
+#define MPU_RGN_NORMAL          (MPU_RGN_CACHEABLE | MPU_ACR_SHARED)
+#else
+#define MPU_RGN_NORMAL          MPU_RGN_CACHEABLE
+#endif
+
+/* Access permission bits of ACR (only define those that we use)*/
+#define MPU_AP_PL1RW_PL0RW      (0x3 << 8)
+#define MPU_AP_PL1RW_PL0R0      (0x2 << 8)
+#define MPU_AP_PL1RW_PL0NA      (0x1 << 8)
+
+/* For minimal static MPU region configurations */
+#define MPU_PROBE_REGION        0
+#define MPU_BG_REGION           1
+#define MPU_RAM_REGION          2
+#define MPU_VECTORS_REGION      3
+
+/* Maximum number of regions Linux is interested in */
+#define MPU_MAX_REGIONS         16
+
+#define MPU_DATA_SIDE           0
+#define MPU_INSTR_SIDE          1
+
+#ifndef __ASSEMBLY__
+
+struct mpu_rgn {
+        /* Assume same attributes for d/i-side  */
+        u32 drbar;
+        u32 drsr;
+        u32 dracr;
+};
+
+struct mpu_rgn_info {
+        u32 mpuir;
+        struct mpu_rgn rgns[MPU_MAX_REGIONS];
+};
+extern struct mpu_rgn_info mpu_rgn_info;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* CONFIG_ARM_MPU */
+
+#endif
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
index 812a4944e783..6363f3d1d505 100644
--- a/arch/arm/include/asm/page.h
+++ b/arch/arm/include/asm/page.h
@@ -13,7 +13,7 @@
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT              12
 #define PAGE_SIZE               (_AC(1,UL) << PAGE_SHIFT)
-#define PAGE_MASK               (~(PAGE_SIZE-1))
+#define PAGE_MASK               (~((1 << PAGE_SHIFT) - 1))
 
 #ifndef __ASSEMBLY__
 
diff --git a/arch/arm/include/asm/pgtable-3level-hwdef.h b/arch/arm/include/asm/pgtable-3level-hwdef.h
index 18f5cef82ad5..626989fec4d3 100644
--- a/arch/arm/include/asm/pgtable-3level-hwdef.h
+++ b/arch/arm/include/asm/pgtable-3level-hwdef.h
@@ -30,6 +30,7 @@
 #define PMD_TYPE_FAULT          (_AT(pmdval_t, 0) << 0)
 #define PMD_TYPE_TABLE          (_AT(pmdval_t, 3) << 0)
 #define PMD_TYPE_SECT           (_AT(pmdval_t, 1) << 0)
+#define PMD_TABLE_BIT           (_AT(pmdval_t, 1) << 1)
 #define PMD_BIT4                (_AT(pmdval_t, 0))
 #define PMD_DOMAIN(x)           (_AT(pmdval_t, 0))
 #define PMD_APTABLE_SHIFT       (61)
@@ -41,6 +42,8 @@
  */
 #define PMD_SECT_BUFFERABLE     (_AT(pmdval_t, 1) << 2)
 #define PMD_SECT_CACHEABLE      (_AT(pmdval_t, 1) << 3)
+#define PMD_SECT_USER           (_AT(pmdval_t, 1) << 6)         /* AP[1] */
+#define PMD_SECT_RDONLY         (_AT(pmdval_t, 1) << 7)         /* AP[2] */
 #define PMD_SECT_S              (_AT(pmdval_t, 3) << 8)
 #define PMD_SECT_AF             (_AT(pmdval_t, 1) << 10)
 #define PMD_SECT_nG             (_AT(pmdval_t, 1) << 11)
@@ -66,6 +69,7 @@
 #define PTE_TYPE_MASK           (_AT(pteval_t, 3) << 0)
 #define PTE_TYPE_FAULT          (_AT(pteval_t, 0) << 0)
 #define PTE_TYPE_PAGE           (_AT(pteval_t, 3) << 0)
+#define PTE_TABLE_BIT           (_AT(pteval_t, 1) << 1)
 #define PTE_BUFFERABLE          (_AT(pteval_t, 1) << 2)         /* AttrIndx[0] */
 #define PTE_CACHEABLE           (_AT(pteval_t, 1) << 3)         /* AttrIndx[1] */
 #define PTE_EXT_SHARED          (_AT(pteval_t, 3) << 8)         /* SH[1:0], inner shareable */
@@ -79,4 +83,24 @@
 #define PHYS_MASK_SHIFT         (40)
 #define PHYS_MASK               ((1ULL << PHYS_MASK_SHIFT) - 1)
 
+/*
+ * TTBR0/TTBR1 split (PAGE_OFFSET):
+ *   0x40000000: T0SZ = 2, T1SZ = 0 (not used)
+ *   0x80000000: T0SZ = 0, T1SZ = 1
+ *   0xc0000000: T0SZ = 0, T1SZ = 2
+ *
+ * Only use this feature if PHYS_OFFSET <= PAGE_OFFSET, otherwise
+ * booting secondary CPUs would end up using TTBR1 for the identity
+ * mapping set up in TTBR0.
+ */
+#if defined CONFIG_VMSPLIT_2G
+#define TTBR1_OFFSET    16                      /* skip two L1 entries */
+#elif defined CONFIG_VMSPLIT_3G
+#define TTBR1_OFFSET    (4096 * (1 + 3))        /* only L2, skip pgd + 3*pmd */
+#else
+#define TTBR1_OFFSET    0
+#endif
+
+#define TTBR1_SIZE      (((PAGE_OFFSET >> 30) - 1) << 16)
+
 #endif
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 86b8fe398b95..5689c18c85f5 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -33,7 +33,7 @@
 #define PTRS_PER_PMD            512
 #define PTRS_PER_PGD            4
 
-#define PTE_HWTABLE_PTRS        (PTRS_PER_PTE)
+#define PTE_HWTABLE_PTRS        (0)
 #define PTE_HWTABLE_OFF         (0)
 #define PTE_HWTABLE_SIZE        (PTRS_PER_PTE * sizeof(u64))
 
@@ -48,20 +48,28 @@
 #define PMD_SHIFT               21
 
 #define PMD_SIZE                (1UL << PMD_SHIFT)
-#define PMD_MASK                (~(PMD_SIZE-1))
+#define PMD_MASK                (~((1 << PMD_SHIFT) - 1))
 #define PGDIR_SIZE              (1UL << PGDIR_SHIFT)
-#define PGDIR_MASK              (~(PGDIR_SIZE-1))
+#define PGDIR_MASK              (~((1 << PGDIR_SHIFT) - 1))
 
 /*
  * section address mask and size definitions.
  */
 #define SECTION_SHIFT           21
 #define SECTION_SIZE            (1UL << SECTION_SHIFT)
-#define SECTION_MASK            (~(SECTION_SIZE-1))
+#define SECTION_MASK            (~((1 << SECTION_SHIFT) - 1))
 
 #define USER_PTRS_PER_PGD       (PAGE_OFFSET / PGDIR_SIZE)
 
 /*
+ * Hugetlb definitions.
+ */
+#define HPAGE_SHIFT             PMD_SHIFT
+#define HPAGE_SIZE              (_AC(1, UL) << HPAGE_SHIFT)
+#define HPAGE_MASK              (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+
+/*
  * "Linux" PTE definitions for LPAE.
  *
  * These bits overlap with the hardware bits but the naming is preserved for
@@ -79,6 +87,11 @@
 #define L_PTE_SPECIAL           (_AT(pteval_t, 1) << 56)        /* unused */
 #define L_PTE_NONE              (_AT(pteval_t, 1) << 57)        /* PROT_NONE */
 
+#define PMD_SECT_VALID          (_AT(pmdval_t, 1) << 0)
+#define PMD_SECT_DIRTY          (_AT(pmdval_t, 1) << 55)
+#define PMD_SECT_SPLITTING      (_AT(pmdval_t, 1) << 56)
+#define PMD_SECT_NONE           (_AT(pmdval_t, 1) << 57)
+
 /*
  * To be used in assembly code with the upper page attributes.
  */
@@ -166,8 +179,83 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
                 clean_pmd_entry(pmdp);  \
         } while (0)
 
+/*
+ * For 3 levels of paging the PTE_EXT_NG bit will be set for user address ptes
+ * that are written to a page table but not for ptes created with mk_pte.
+ *
+ * In hugetlb_no_page, a new huge pte (new_pte) is generated and passed to
+ * hugetlb_cow, where it is compared with an entry in a page table.
+ * This comparison test fails erroneously leading ultimately to a memory leak.
+ *
+ * To correct this behaviour, we mask off PTE_EXT_NG for any pte that is
+ * present before running the comparison.
+ */
+#define __HAVE_ARCH_PTE_SAME
+#define pte_same(pte_a,pte_b)   ((pte_present(pte_a) ? pte_val(pte_a) & ~PTE_EXT_NG     \
+                                        : pte_val(pte_a))                               \
+                                == (pte_present(pte_b) ? pte_val(pte_b) & ~PTE_EXT_NG   \
+                                        : pte_val(pte_b)))
+
 #define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,__pte(pte_val(pte)|(ext)))
 
+#define pte_huge(pte)           (pte_val(pte) && !(pte_val(pte) & PTE_TABLE_BIT))
+#define pte_mkhuge(pte)         (__pte(pte_val(pte) & ~PTE_TABLE_BIT))
+
+#define pmd_young(pmd)          (pmd_val(pmd) & PMD_SECT_AF)
+
+#define __HAVE_ARCH_PMD_WRITE
+#define pmd_write(pmd)          (!(pmd_val(pmd) & PMD_SECT_RDONLY))
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define pmd_trans_huge(pmd)     (pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT))
+#define pmd_trans_splitting(pmd) (pmd_val(pmd) & PMD_SECT_SPLITTING)
+#endif
+
+#define PMD_BIT_FUNC(fn,op) \
+static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; }
+
+PMD_BIT_FUNC(wrprotect, |= PMD_SECT_RDONLY);
+PMD_BIT_FUNC(mkold,     &= ~PMD_SECT_AF);
+PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING);
+PMD_BIT_FUNC(mkwrite,   &= ~PMD_SECT_RDONLY);
+PMD_BIT_FUNC(mkdirty,   |= PMD_SECT_DIRTY);
+PMD_BIT_FUNC(mkyoung,   |= PMD_SECT_AF);
+
+#define pmd_mkhuge(pmd)         (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
+
+#define pmd_pfn(pmd)            (((pmd_val(pmd) & PMD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
+#define pfn_pmd(pfn,prot)       (__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)))
+#define mk_pmd(page,prot)       pfn_pmd(page_to_pfn(page),prot)
+
+/* represent a notpresent pmd by zero, this is used by pmdp_invalidate */
+#define pmd_mknotpresent(pmd)   (__pmd(0))
+
+static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
+{
+        const pmdval_t mask = PMD_SECT_USER | PMD_SECT_XN | PMD_SECT_RDONLY |
+                                PMD_SECT_VALID | PMD_SECT_NONE;
+        pmd_val(pmd) = (pmd_val(pmd) & ~mask) | (pgprot_val(newprot) & mask);
+        return pmd;
+}
+
+static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
+                              pmd_t *pmdp, pmd_t pmd)
+{
+        BUG_ON(addr >= TASK_SIZE);
+
+        /* create a faulting entry if PROT_NONE protected */
+        if (pmd_val(pmd) & PMD_SECT_NONE)
+                pmd_val(pmd) &= ~PMD_SECT_VALID;
+
+        *pmdp = __pmd(pmd_val(pmd) | PMD_SECT_nG);
+        flush_pmd_entry(pmdp);
+}
+
+static inline int has_transparent_hugepage(void)
+{
+        return 1;
+}
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_PGTABLE_3LEVEL_H */
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 9bcd262a9008..eaedce7b7e3a 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -24,6 +24,9 @@
 #include <asm/memory.h>
 #include <asm/pgtable-hwdef.h>
 
+
+#include <asm/tlbflush.h>
+
 #ifdef CONFIG_ARM_LPAE
 #include <asm/pgtable-3level.h>
 #else
diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h
index f3628fb3d2b3..5324c1112f3a 100644
--- a/arch/arm/include/asm/proc-fns.h
+++ b/arch/arm/include/asm/proc-fns.h
@@ -60,7 +60,7 @@ extern struct processor {
         /*
          * Set the page table
          */
-        void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
+        void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm);
         /*
          * Set a possibly extended PTE.  Non-extended PTEs should
          * ignore 'ext'.
@@ -82,7 +82,7 @@ extern void cpu_proc_init(void);
 extern void cpu_proc_fin(void);
 extern int cpu_do_idle(void);
 extern void cpu_dcache_clean_area(void *, int);
-extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
+extern void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
 #ifdef CONFIG_ARM_LPAE
 extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
 #else
@@ -116,13 +116,25 @@ extern void cpu_resume(void);
 #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
 
 #ifdef CONFIG_ARM_LPAE
+
+#define cpu_get_ttbr(nr)                                        \
+        ({                                                      \
+                u64 ttbr;                                       \
+                __asm__("mrrc   p15, " #nr ", %Q0, %R0, c2"     \
+                        : "=r" (ttbr));                         \
+                ttbr;                                           \
+        })
+
+#define cpu_set_ttbr(nr, val)                                   \
+        do {                                                    \
+                u64 ttbr = val;                                 \
+                __asm__("mcrr   p15, " #nr ", %Q0, %R0, c2"     \
+                        : : "r" (ttbr));                        \
+        } while (0)
+
 #define cpu_get_pgd()   \
         ({                                              \
-                unsigned long pg, pg2;                  \
-                __asm__("mrrc   p15, 0, %0, %1, c2"     \
-                        : "=r" (pg), "=r" (pg2)         \
-                        :                               \
-                        : "cc");                        \
+                u64 pg = cpu_get_ttbr(0);               \
                 pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1);  \
                 (pgd_t *)phys_to_virt(pg);              \
         })
@@ -137,6 +149,10 @@ extern void cpu_resume(void);
         })
 #endif
 
+#else   /*!CONFIG_MMU */
+
+#define cpu_switch_mm(pgd,mm)   { }
+
 #endif
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/arm/include/asm/psci.h b/arch/arm/include/asm/psci.h
index ce0dbe7c1625..c4ae171850f8 100644
--- a/arch/arm/include/asm/psci.h
+++ b/arch/arm/include/asm/psci.h
@@ -32,5 +32,14 @@ struct psci_operations {
 };
 
 extern struct psci_operations psci_ops;
+extern struct smp_operations psci_smp_ops;
+
+#ifdef CONFIG_ARM_PSCI
+void psci_init(void);
+bool psci_smp_available(void);
+#else
+static inline void psci_init(void) { }
+static inline bool psci_smp_available(void) { return false; }
+#endif
 
 #endif /* __ASM_ARM_PSCI_H */
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 3d52ee1bfb31..04c99f36ff7f 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -45,6 +45,7 @@ struct pt_regs {
  */
 static inline int valid_user_regs(struct pt_regs *regs)
 {
+#ifndef CONFIG_CPU_V7M
         unsigned long mode = regs->ARM_cpsr & MODE_MASK;
 
         /*
@@ -67,6 +68,9 @@ static inline int valid_user_regs(struct pt_regs *regs)
                 regs->ARM_cpsr |= USR_MODE;
 
         return 0;
+#else /* ifndef CONFIG_CPU_V7M */
+        return 1;
+#endif
 }
 
 static inline long regs_return_value(struct pt_regs *regs)
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index d3a22bebe6ce..a8cae71caceb 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -65,7 +65,10 @@ asmlinkage void secondary_start_kernel(void);
  * Initial data for bringing up a secondary CPU.
  */
 struct secondary_data {
-        unsigned long pgdir;
+        union {
+                unsigned long mpu_rgn_szr;
+                unsigned long pgdir;
+        };
         unsigned long swapper_pg_dir;
         void *stack;
 };
diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h
index e78983202737..6462a721ebd4 100644
--- a/arch/arm/include/asm/smp_plat.h
+++ b/arch/arm/include/asm/smp_plat.h
@@ -26,6 +26,9 @@ static inline bool is_smp(void)
 }
 
 /* all SMP configurations have the extended CPUID registers */
+#ifndef CONFIG_MMU
+#define tlb_ops_need_broadcast()        0
+#else
 static inline int tlb_ops_need_broadcast(void)
 {
         if (!is_smp())
@@ -33,6 +36,7 @@ static inline int tlb_ops_need_broadcast(void)
 
         return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
 }
+#endif
 
 #if !defined(CONFIG_SMP) || __LINUX_ARM_ARCH__ >= 7
 #define cache_ops_need_broadcast()      0
@@ -66,4 +70,22 @@ static inline int get_logical_index(u32 mpidr)
         return -EINVAL;
 }
 
+/*
+ * NOTE ! Assembly code relies on the following
+ * structure memory layout in order to carry out load
+ * multiple from its base address. For more
+ * information check arch/arm/kernel/sleep.S
+ */
+struct mpidr_hash {
+        u32     mask; /* used by sleep.S */
+        u32     shift_aff[3]; /* used by sleep.S */
+        u32     bits;
+};
+
+extern struct mpidr_hash mpidr_hash;
+
+static inline u32 mpidr_hash_size(void)
+{
+        return 1 << mpidr_hash.bits;
+}
 #endif
diff --git a/arch/arm/include/asm/suspend.h b/arch/arm/include/asm/suspend.h
index 1c0a551ae375..cd20029bcd94 100644
--- a/arch/arm/include/asm/suspend.h
+++ b/arch/arm/include/asm/suspend.h
@@ -1,6 +1,11 @@
 #ifndef __ASM_ARM_SUSPEND_H
 #define __ASM_ARM_SUSPEND_H
 
+struct sleep_save_sp {
+        u32 *save_ptr_stash;
+        u32 save_ptr_stash_phys;
+};
+
 extern void cpu_resume(void);
 extern int cpu_suspend(unsigned long, int (*)(unsigned long));
 
diff --git a/arch/arm/include/asm/system_info.h b/arch/arm/include/asm/system_info.h
index dfd386d0c022..720ea0320a6d 100644
--- a/arch/arm/include/asm/system_info.h
+++ b/arch/arm/include/asm/system_info.h
@@ -11,6 +11,7 @@
 #define CPU_ARCH_ARMv5TEJ       7
 #define CPU_ARCH_ARMv6          8
 #define CPU_ARCH_ARMv7          9
+#define CPU_ARCH_ARMv7M         10
 
 #ifndef __ASSEMBLY__
 
diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h
index bdf2b8458ec1..46e7cfb3e721 100644
--- a/arch/arm/include/asm/tlb.h
+++ b/arch/arm/include/asm/tlb.h
@@ -204,6 +204,12 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
 #endif
 }
 
+static inline void
+tlb_remove_pmd_tlb_entry(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr)
+{
+        tlb_add_flush(tlb, addr);
+}
+
 #define pte_free_tlb(tlb, ptep, addr)   __pte_free_tlb(tlb, ptep, addr)
 #define pmd_free_tlb(tlb, pmdp, addr)   __pmd_free_tlb(tlb, pmdp, addr)
 #define pud_free_tlb(tlb, pudp, addr)   pud_free((tlb)->mm, pudp)
diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h
index a3625d141c1d..fdbb9e369745 100644
--- a/arch/arm/include/asm/tlbflush.h
+++ b/arch/arm/include/asm/tlbflush.h
@@ -535,8 +535,33 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
 }
 #endif
 
+#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0)
+
 #endif
 
-#endif /* CONFIG_MMU */
+#elif defined(CONFIG_SMP)       /* !CONFIG_MMU */
+
+#ifndef __ASSEMBLY__
+
+#include <linux/mm_types.h>
+
+static inline void local_flush_tlb_all(void)                                                                    { }
+static inline void local_flush_tlb_mm(struct mm_struct *mm)                                                     { }
+static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)                        { }
+static inline void local_flush_tlb_kernel_page(unsigned long kaddr)                                             { }
+static inline void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)    { }
+static inline void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)                         { }
+static inline void local_flush_bp_all(void)                                                                     { }
+
+extern void flush_tlb_all(void);
+extern void flush_tlb_mm(struct mm_struct *mm);
+extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr);
+extern void flush_tlb_kernel_page(unsigned long kaddr);
+extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+extern void flush_bp_all(void);
+#endif  /* __ASSEMBLY__ */
+
+#endif
 
 #endif
diff --git a/arch/arm/include/asm/v7m.h b/arch/arm/include/asm/v7m.h
new file mode 100644
index 000000000000..fa88d09fa3d9
--- /dev/null
+++ b/arch/arm/include/asm/v7m.h
@@ -0,0 +1,44 @@
+/*
+ * Common defines for v7m cpus
+ */
+#define V7M_SCS_ICTR                    IOMEM(0xe000e004)
+#define V7M_SCS_ICTR_INTLINESNUM_MASK           0x0000000f
+
+#define BASEADDR_V7M_SCB                IOMEM(0xe000ed00)
+
+#define V7M_SCB_CPUID                   0x00
+
+#define V7M_SCB_ICSR                    0x04
+#define V7M_SCB_ICSR_PENDSVSET                  (1 << 28)
+#define V7M_SCB_ICSR_PENDSVCLR                  (1 << 27)
+#define V7M_SCB_ICSR_RETTOBASE                  (1 << 11)
+
+#define V7M_SCB_VTOR                    0x08
+
+#define V7M_SCB_SCR                     0x10
+#define V7M_SCB_SCR_SLEEPDEEP                   (1 << 2)
+
+#define V7M_SCB_CCR                     0x14
+#define V7M_SCB_CCR_STKALIGN                    (1 << 9)
+
+#define V7M_SCB_SHPR2                   0x1c
+#define V7M_SCB_SHPR3                   0x20
+
+#define V7M_SCB_SHCSR                   0x24
+#define V7M_SCB_SHCSR_USGFAULTENA               (1 << 18)
+#define V7M_SCB_SHCSR_BUSFAULTENA               (1 << 17)
+#define V7M_SCB_SHCSR_MEMFAULTENA               (1 << 16)
+
+#define V7M_xPSR_FRAMEPTRALIGN                  0x00000200
+#define V7M_xPSR_EXCEPTIONNO                    0x000001ff
+
+/*
+ * When branching to an address that has bits [31:28] == 0xf an exception return
+ * occurs. Bits [27:5] are reserved (SBOP). If the processor implements the FP
+ * extension Bit [4] defines if the exception frame has space allocated for FP
+ * state information, SBOP otherwise. Bit [3] defines the mode that is returned
+ * to (0 -> handler mode; 1 -> thread mode). Bit [2] defines which sp is used
+ * (0 -> msp; 1 -> psp). Bits [1:0] are fixed to 0b01.
+ */
+#define EXC_RET_STACK_MASK                      0x00000004
+#define EXC_RET_THREADMODE_PROCESSSTACK         0xfffffffd
diff --git a/arch/arm/include/debug/vexpress.S b/arch/arm/include/debug/vexpress.S
index dc8e882a6257..acafb229e2b6 100644
--- a/arch/arm/include/debug/vexpress.S
+++ b/arch/arm/include/debug/vexpress.S
@@ -16,6 +16,8 @@
 #define DEBUG_LL_PHYS_BASE_RS1          0x1c000000
 #define DEBUG_LL_UART_OFFSET_RS1        0x00090000
 
+#define DEBUG_LL_UART_PHYS_CRX          0xb0090000
+
 #define DEBUG_LL_VIRT_BASE              0xf8000000
 
 #if defined(CONFIG_DEBUG_VEXPRESS_UART0_DETECT)
@@ -67,6 +69,14 @@
 
 #include <asm/hardware/debug-pl01x.S>
 
+#elif defined(CONFIG_DEBUG_VEXPRESS_UART0_CRX)
+
+                .macro  addruart,rp,tmp,tmp2
+                ldr     \rp, =DEBUG_LL_UART_PHYS_CRX
+                .endm
+
+#include <asm/hardware/debug-pl01x.S>
+
 #else /* CONFIG_DEBUG_LL_UART_NONE */
 
                 .macro  addruart, rp, rv, tmp
diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h
index 3688fd15a32d..6d34d080372a 100644
--- a/arch/arm/include/uapi/asm/hwcap.h
+++ b/arch/arm/include/uapi/asm/hwcap.h
@@ -25,6 +25,6 @@
 #define HWCAP_IDIVT     (1 << 18)
 #define HWCAP_VFPD32    (1 << 19)       /* set if VFP has 32 regs (not 16) */
 #define HWCAP_IDIV      (HWCAP_IDIVA | HWCAP_IDIVT)
-
+#define HWCAP_LPAE      (1 << 20)
 
 #endif /* _UAPI__ASMARM_HWCAP_H */
diff --git a/arch/arm/include/uapi/asm/ptrace.h b/arch/arm/include/uapi/asm/ptrace.h
index 96ee0929790f..5af0ed1b825a 100644
--- a/arch/arm/include/uapi/asm/ptrace.h
+++ b/arch/arm/include/uapi/asm/ptrace.h
@@ -34,28 +34,47 @@
 
 /*
  * PSR bits
+ * Note on V7M there is no mode contained in the PSR
  */
 #define USR26_MODE      0x00000000
 #define FIQ26_MODE      0x00000001
 #define IRQ26_MODE      0x00000002
 #define SVC26_MODE      0x00000003
+#if defined(__KERNEL__) && defined(CONFIG_CPU_V7M)
+/*
+ * Use 0 here to get code right that creates a userspace
+ * or kernel space thread.
+ */
+#define USR_MODE        0x00000000
+#define SVC_MODE        0x00000000
+#else
 #define USR_MODE        0x00000010
+#define SVC_MODE        0x00000013
+#endif
 #define FIQ_MODE        0x00000011
 #define IRQ_MODE        0x00000012
-#define SVC_MODE        0x00000013
 #define ABT_MODE        0x00000017
 #define HYP_MODE        0x0000001a
 #define UND_MODE        0x0000001b
 #define SYSTEM_MODE     0x0000001f
 #define MODE32_BIT      0x00000010
 #define MODE_MASK       0x0000001f
-#define PSR_T_BIT       0x00000020
-#define PSR_F_BIT       0x00000040
-#define PSR_I_BIT       0x00000080
-#define PSR_A_BIT       0x00000100
-#define PSR_E_BIT       0x00000200
-#define PSR_J_BIT       0x01000000
-#define PSR_Q_BIT       0x08000000
+
+#define V4_PSR_T_BIT    0x00000020      /* >= V4T, but not V7M */
+#define V7M_PSR_T_BIT   0x01000000
+#if defined(__KERNEL__) && defined(CONFIG_CPU_V7M)
+#define PSR_T_BIT       V7M_PSR_T_BIT
+#else
+/* for compatibility */
+#define PSR_T_BIT       V4_PSR_T_BIT
+#endif
+
+#define PSR_F_BIT       0x00000040      /* >= V4, but not V7M */
+#define PSR_I_BIT       0x00000080      /* >= V4, but not V7M */
+#define PSR_A_BIT       0x00000100      /* >= V6, but not V7M */
+#define PSR_E_BIT       0x00000200      /* >= V6, but not V7M */
+#define PSR_J_BIT       0x01000000      /* >= V5J, but not V7M */
+#define PSR_Q_BIT       0x08000000      /* >= V5E, including V7M */
 #define PSR_V_BIT       0x10000000
 #define PSR_C_BIT       0x20000000
 #define PSR_Z_BIT       0x40000000