Merge tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux

Pull Xtensa fixes from Chris Zankel:
 - fix nommu support
 - remove s6000 variant and s6105 platform
 - fix permissions for kmapped pages so that copy_to_user_page works with them
 - add power management menu to Kconfig to allow use of runtime PM
 - disable linker optimizations because of a linker bug
 - fix sparse error

* tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux:
  xtensa: disable link optimization
  xtensa/uaccess: fix sparse errors
  xtensa: fix kmap_prot definition
  xtensa: add power management menu to Kconfig
  xtensa: remove s6000 variant and s6105 platform
  xtensa: make PLATFORM_DEFAULT_MEM parameters configurable
  xtensa: nommu: clean up memory map dump
  xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_START
  xtensa: nommu: set up cache and atomctl in initialize_mmu
  xtensa: move vecbase SR initialization to _startup
  xtensa: nommu: fix uImage load address
  xtensa: nommu: fix load address definitions
  xtensa: nommu: fix Image.elf reset code and ld script
  xtensa: nommu: add MMU dependency to DEBUG_TLB_SANITY
  xtensa: nommu: don't build most of the cache flushing code
  xtensa: nommu: don't provide arch_get_unmapped_area
  xtensa: nommu: provide MAP_UNINITIALIZED definition
  xtensa: nommu: provide _PAGE_CHG_MASK definition
  xtensa: nommu: provide __invalidate_dcache_page_alias stub
  xtensa: nommu: move init_mmu stub to nommu_context.h

10 files changed, 65 insertions, 22 deletions

diff --git a/arch/xtensa/include/asm/cacheflush.h b/arch/xtensa/include/asm/cacheflush.h
index e72aaca7a77f..5f67ace97b32 100644
--- a/arch/xtensa/include/asm/cacheflush.h
+++ b/arch/xtensa/include/asm/cacheflush.h
@@ -67,6 +67,8 @@ extern void __invalidate_dcache_page_alias(unsigned long, unsigned long);
 #else
 static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
                                                         unsigned long phys) { }
+static inline void __invalidate_dcache_page_alias(unsigned long virt,
+                                                  unsigned long phys) { }
 #endif
 #if defined(CONFIG_MMU) && (ICACHE_WAY_SIZE > PAGE_SIZE)
 extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
@@ -84,7 +86,8 @@ static inline void __invalidate_icache_page_alias(unsigned long virt,
  * (see also Documentation/cachetlb.txt)
  */
 
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP)
+#if defined(CONFIG_MMU) && \
+        ((DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP))
 
 #ifdef CONFIG_SMP
 void flush_cache_all(void);
@@ -150,7 +153,7 @@ void local_flush_cache_page(struct vm_area_struct *vma,
 #define flush_dcache_mmap_lock(mapping)                 do { } while (0)
 #define flush_dcache_mmap_unlock(mapping)               do { } while (0)
 
-#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
 
 extern void copy_to_user_page(struct vm_area_struct*, struct page*,
                 unsigned long, void*, const void*, unsigned long);
diff --git a/arch/xtensa/include/asm/highmem.h b/arch/xtensa/include/asm/highmem.h
index 2c7901edffaf..01cef6b40829 100644
--- a/arch/xtensa/include/asm/highmem.h
+++ b/arch/xtensa/include/asm/highmem.h
@@ -25,7 +25,7 @@
 #define PKMAP_NR(virt)          (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
 #define PKMAP_ADDR(nr)          (PKMAP_BASE + ((nr) << PAGE_SHIFT))
 
-#define kmap_prot               PAGE_KERNEL
+#define kmap_prot               PAGE_KERNEL_EXEC
 
 #if DCACHE_WAY_SIZE > PAGE_SIZE
 #define get_pkmap_color get_pkmap_color
diff --git a/arch/xtensa/include/asm/initialize_mmu.h b/arch/xtensa/include/asm/initialize_mmu.h
index 600781edc8a3..e256f2270ec9 100644
--- a/arch/xtensa/include/asm/initialize_mmu.h
+++ b/arch/xtensa/include/asm/initialize_mmu.h
@@ -26,8 +26,16 @@
 #include <asm/pgtable.h>
 #include <asm/vectors.h>
 
+#if XCHAL_HAVE_PTP_MMU
 #define CA_BYPASS       (_PAGE_CA_BYPASS | _PAGE_HW_WRITE | _PAGE_HW_EXEC)
 #define CA_WRITEBACK    (_PAGE_CA_WB     | _PAGE_HW_WRITE | _PAGE_HW_EXEC)
+#else
+#define CA_WRITEBACK    (0x4)
+#endif
+
+#ifndef XCHAL_SPANNING_WAY
+#define XCHAL_SPANNING_WAY 0
+#endif
 
 #ifdef __ASSEMBLY__
 
@@ -75,7 +83,7 @@
 
         /* Step 1: invalidate mapping at 0x40000000..0x5FFFFFFF. */
 
-        movi    a2, 0x40000006
+        movi    a2, 0x40000000 | XCHAL_SPANNING_WAY
         idtlb   a2
         iitlb   a2
         isync
@@ -141,9 +149,6 @@
         jx      a4
 
 1:
-        movi    a2, VECBASE_RESET_VADDR
-        wsr     a2, vecbase
-
         /* Step 5: remove temporary mapping. */
         idtlb   a7
         iitlb   a7
@@ -156,6 +161,33 @@
 #endif /* defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU &&
           XCHAL_HAVE_SPANNING_WAY */
 
+#if !defined(CONFIG_MMU) && XCHAL_HAVE_TLBS
+        /* Enable data and instruction cache in the DEFAULT_MEMORY region
+         * if the processor has DTLB and ITLB.
+         */
+
+        movi    a5, PLATFORM_DEFAULT_MEM_START | XCHAL_SPANNING_WAY
+        movi    a6, ~_PAGE_ATTRIB_MASK
+        movi    a7, CA_WRITEBACK
+        movi    a8, 0x20000000
+        movi    a9, PLATFORM_DEFAULT_MEM_SIZE
+        j       2f
+1:
+        sub     a9, a9, a8
+2:
+        rdtlb1  a3, a5
+        ritlb1  a4, a5
+        and     a3, a3, a6
+        and     a4, a4, a6
+        or      a3, a3, a7
+        or      a4, a4, a7
+        wdtlb   a3, a5
+        witlb   a4, a5
+        add     a5, a5, a8
+        bltu    a8, a9, 1b
+
+#endif
+
         .endm
 
 #endif /*__ASSEMBLY__*/
diff --git a/arch/xtensa/include/asm/mmu_context.h b/arch/xtensa/include/asm/mmu_context.h
index d33c71a8c9ec..04c8ebdc4517 100644
--- a/arch/xtensa/include/asm/mmu_context.h
+++ b/arch/xtensa/include/asm/mmu_context.h
@@ -50,11 +50,7 @@ DECLARE_PER_CPU(unsigned long, asid_cache);
 #define ASID_MASK       ((1 << XCHAL_MMU_ASID_BITS) - 1)
 #define ASID_INSERT(x)  (0x03020001 | (((x) & ASID_MASK) << 8))
 
-#ifdef CONFIG_MMU
 void init_mmu(void);
-#else
-static inline void init_mmu(void) { }
-#endif
 
 static inline void set_rasid_register (unsigned long val)
 {
diff --git a/arch/xtensa/include/asm/nommu_context.h b/arch/xtensa/include/asm/nommu_context.h
index 3407cf7989b7..22984fd1d846 100644
--- a/arch/xtensa/include/asm/nommu_context.h
+++ b/arch/xtensa/include/asm/nommu_context.h
@@ -1,3 +1,7 @@
+static inline void init_mmu(void)
+{
+}
+
 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 {
 }
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
index abe24c6f8b2f..ad38500471fa 100644
--- a/arch/xtensa/include/asm/page.h
+++ b/arch/xtensa/include/asm/page.h
@@ -20,10 +20,10 @@
  * Fixed TLB translations in the processor.
  */
 
-#define XCHAL_KSEG_CACHED_VADDR 0xd0000000
-#define XCHAL_KSEG_BYPASS_VADDR 0xd8000000
-#define XCHAL_KSEG_PADDR        0x00000000
-#define XCHAL_KSEG_SIZE         0x08000000
+#define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xd0000000)
+#define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xd8000000)
+#define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(0x00000000)
+#define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x08000000)
 
 /*
  * PAGE_SHIFT determines the page size
@@ -37,7 +37,7 @@
 #define PAGE_OFFSET     XCHAL_KSEG_CACHED_VADDR
 #define MAX_MEM_PFN     XCHAL_KSEG_SIZE
 #else
-#define PAGE_OFFSET     0
+#define PAGE_OFFSET     __XTENSA_UL_CONST(0)
 #define MAX_MEM_PFN     (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE)
 #endif
 
@@ -145,7 +145,7 @@ extern void copy_page(void *to, void *from);
  * some extra work
  */
 
-#if DCACHE_WAY_SIZE > PAGE_SIZE
+#if defined(CONFIG_MMU) && DCACHE_WAY_SIZE > PAGE_SIZE
 extern void clear_page_alias(void *vaddr, unsigned long paddr);
 extern void copy_page_alias(void *to, void *from,
                             unsigned long to_paddr, unsigned long from_paddr);
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 0383aed59121..872bf0194e6d 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -178,6 +178,7 @@
 
 #else /* no mmu */
 
+# define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
 # define PAGE_NONE       __pgprot(0)
 # define PAGE_SHARED     __pgprot(0)
 # define PAGE_COPY       __pgprot(0)
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index c7211e7e182d..876eb380aa26 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -320,7 +320,7 @@ __asm__ __volatile__(					\
 ({                                                              \
         long __gu_err, __gu_val;                                \
         __get_user_size(__gu_val,(ptr),(size),__gu_err);        \
-        (x) = (__typeof__(*(ptr)))__gu_val;                     \
+        (x) = (__force __typeof__(*(ptr)))__gu_val;                     \
         __gu_err;                                               \
 })
 
@@ -330,7 +330,7 @@ __asm__ __volatile__(					\
         const __typeof__(*(ptr)) *__gu_addr = (ptr);                    \
         if (access_ok(VERIFY_READ,__gu_addr,size))                      \
                 __get_user_size(__gu_val,__gu_addr,(size),__gu_err);    \
-        (x) = (__typeof__(*(ptr)))__gu_val;                             \
+        (x) = (__force __typeof__(*(ptr)))__gu_val;                             \
         __gu_err;                                                       \
 })
 
diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h
index f74ddfbb92ef..a46c53f36113 100644
--- a/arch/xtensa/include/asm/vectors.h
+++ b/arch/xtensa/include/asm/vectors.h
@@ -19,6 +19,7 @@
 #define _XTENSA_VECTORS_H
 
 #include <variant/core.h>
+#include <platform/hardware.h>
 
 #define XCHAL_KIO_CACHED_VADDR          0xe0000000
 #define XCHAL_KIO_BYPASS_VADDR          0xf0000000
@@ -51,13 +52,13 @@
   /* MMU Not being used - Virtual == Physical */
 
   /* VECBASE */
-  #define VIRTUAL_MEMORY_ADDRESS        0x00002000
+  #define VIRTUAL_MEMORY_ADDRESS        (PLATFORM_DEFAULT_MEM_START + 0x2000)
 
   /* Location of the start of the kernel text, _start */
-  #define KERNELOFFSET                  0x00003000
+  #define KERNELOFFSET                  (PLATFORM_DEFAULT_MEM_START + 0x3000)
 
   /* Loaded just above possibly live vectors */
-  #define LOAD_MEMORY_ADDRESS           0x00003000
+  #define LOAD_MEMORY_ADDRESS           (PLATFORM_DEFAULT_MEM_START + 0x3000)
 
 #endif /* CONFIG_MMU */
 
diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h
index 00eed6786d7e..201aec0e0446 100644
--- a/arch/xtensa/include/uapi/asm/mman.h
+++ b/arch/xtensa/include/uapi/asm/mman.h
@@ -55,6 +55,12 @@
 #define MAP_NONBLOCK    0x20000         /* do not block on IO */
 #define MAP_STACK       0x40000         /* give out an address that is best suited for process/thread stacks */
 #define MAP_HUGETLB     0x80000         /* create a huge page mapping */
+#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
+# define MAP_UNINITIALIZED 0x4000000    /* For anonymous mmap, memory could be
+                                         * uninitialized */
+#else
+# define MAP_UNINITIALIZED 0x0          /* Don't support this flag */
+#endif
 
 /*
  * Flags for msync