Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze

* 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Makefile cleanup
  microblaze: Typo fix for cpu param inconsistency
  microblaze: Add support for R_MICROBLAZE_64_NONE
  microblaze: Get module loading working
  microblaze: remove sys_ipc
  microblaze: Support unaligned address for put/get_user macros
  microblaze: Detect new Microblaze 7.20 versions
  microblaze: Fix do_page_fault for no context
  microblaze: Add _PAGE_FILE macros to pgtable.h
  microblaze: Fix put_user macro for 64bits arguments
  microblaze: Clear print messages for DTB passing via r7
  microblaze: Not to clear r7 after copying DTB to kernel
  microblaze: Add messages about FDT blob
  microblaze: Final support for statically linked DTB
  microblaze: remove duplicated #include
  microblaze: Define tlb_flush macro

17 files changed, 126 insertions, 220 deletions

diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile
index d0bcf80a1136..8439598d4655 100644
--- a/arch/microblaze/Makefile
+++ b/arch/microblaze/Makefile
@@ -6,14 +6,16 @@ endif
 
 # What CPU vesion are we building for, and crack it open
 # as major.minor.rev
-CPU_VER=$(subst ",,$(CONFIG_XILINX_MICROBLAZE0_HW_VER) )
-CPU_MAJOR=$(shell echo $(CPU_VER) | cut -d '.' -f 1)
-CPU_MINOR=$(shell echo $(CPU_VER) | cut -d '.' -f 2)
-CPU_REV=$(shell echo $(CPU_VER) | cut -d '.' -f 3)
+CPU_VER   := $(shell echo $(CONFIG_XILINX_MICROBLAZE0_HW_VER))
+CPU_MAJOR := $(shell echo $(CPU_VER) | cut -d '.' -f 1)
+CPU_MINOR := $(shell echo $(CPU_VER) | cut -d '.' -f 2)
+CPU_REV   := $(shell echo $(CPU_VER) | cut -d '.' -f 3)
 
 export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
 
 # Use cpu-related CONFIG_ vars to set compile options.
+# The various CONFIG_XILINX cpu features options are integers 0/1/2...
+# rather than bools y/n
 
 # Work out HW multipler support.  This is icky.
 # 1. Spartan2 has no HW multiplers.
@@ -34,30 +36,29 @@ CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
 
 CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
 
-# The various CONFIG_XILINX cpu features options are integers 0/1/2...
-# rather than bools y/n
-
 # r31 holds current when in kernel mode
-CFLAGS_KERNEL += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2)
+KBUILD_KERNEL += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2)
 
 LDFLAGS         :=
 LDFLAGS_vmlinux :=
-LDFLAGS_BLOB := --format binary --oformat elf32-microblaze
 
-LIBGCC := $(shell $(CC) $(CFLAGS_KERNEL) -print-libgcc-file-name)
+LIBGCC := $(shell $(CC) $(KBUILD_KERNEL) -print-libgcc-file-name)
 
-head-y          := arch/microblaze/kernel/head.o
-libs-y          += arch/microblaze/lib/ $(LIBGCC)
-core-y          += arch/microblaze/kernel/ arch/microblaze/mm/ \
-                   arch/microblaze/platform/
+head-y := arch/microblaze/kernel/head.o
+libs-y += arch/microblaze/lib/
+libs-y += $(LIBGCC)
+core-y += arch/microblaze/kernel/
+core-y += arch/microblaze/mm/
+core-y += arch/microblaze/platform/
 
-boot := arch/$(ARCH)/boot
+boot := arch/microblaze/boot
 
 # defines filename extension depending memory management type
 ifeq ($(CONFIG_MMU),)
-MMUEXT          := -nommu
+MMU := -nommu
 endif
-export  MMUEXT
+
+export MMU
 
 all: linux.bin
 
diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h
index 5c173424d074..7c3ec13b44d8 100644
--- a/arch/microblaze/include/asm/io.h
+++ b/arch/microblaze/include/asm/io.h
@@ -14,7 +14,6 @@
 #include <asm/byteorder.h>
 #include <asm/page.h>
 #include <linux/types.h>
-#include <asm/byteorder.h>
 #include <linux/mm.h>          /* Get struct page {...} */
 
 
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index 4c57a586a989..cc3a4dfc3eaa 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -185,6 +185,7 @@ static inline pte_t pte_mkspecial(pte_t pte)	{ return pte; }
 
 /* Definitions for MicroBlaze. */
 #define _PAGE_GUARDED   0x001   /* G: page is guarded from prefetch */
+#define _PAGE_FILE      0x001   /* when !present: nonlinear file mapping */
 #define _PAGE_PRESENT   0x002   /* software: PTE contains a translation */
 #define _PAGE_NO_CACHE  0x004   /* I: caching is inhibited */
 #define _PAGE_WRITETHRU 0x008   /* W: caching is write-through */
@@ -320,8 +321,7 @@ static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
 static inline int pte_exec(pte_t pte)  { return pte_val(pte) & _PAGE_EXEC; }
 static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
 static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
-/* FIXME */
-static inline int pte_file(pte_t pte)           { return 0; }
+static inline int pte_file(pte_t pte)  { return pte_val(pte) & _PAGE_FILE; }
 
 static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; }
 static inline void pte_cache(pte_t pte)   { pte_val(pte) &= ~_PAGE_NO_CACHE; }
@@ -488,7 +488,7 @@ static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
 /* Encode and decode a nonlinear file mapping entry */
 #define PTE_FILE_MAX_BITS       29
 #define pte_to_pgoff(pte)       (pte_val(pte) >> 3)
-#define pgoff_to_pte(off)       ((pte_t) { ((off) << 3) })
+#define pgoff_to_pte(off)       ((pte_t) { ((off) << 3) | _PAGE_FILE })
 
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 
diff --git a/arch/microblaze/include/asm/prom.h b/arch/microblaze/include/asm/prom.h
index 20f7b3a926e8..37e6f305a68e 100644
--- a/arch/microblaze/include/asm/prom.h
+++ b/arch/microblaze/include/asm/prom.h
@@ -16,6 +16,18 @@
 #define _ASM_MICROBLAZE_PROM_H
 #ifdef __KERNEL__
 
+/* Definitions used by the flattened device tree */
+#define OF_DT_HEADER            0xd00dfeed /* marker */
+#define OF_DT_BEGIN_NODE        0x1 /* Start of node, full name */
+#define OF_DT_END_NODE          0x2 /* End node */
+#define OF_DT_PROP              0x3 /* Property: name off, size, content */
+#define OF_DT_NOP               0x4 /* nop */
+#define OF_DT_END               0x9
+
+#define OF_DT_VERSION           0x10
+
+#ifndef __ASSEMBLY__
+
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <linux/platform_device.h>
@@ -29,16 +41,6 @@
 #define of_prop_cmp(s1, s2)             strcmp((s1), (s2))
 #define of_node_cmp(s1, s2)             strcasecmp((s1), (s2))
 
-/* Definitions used by the flattened device tree */
-#define OF_DT_HEADER            0xd00dfeed /* marker */
-#define OF_DT_BEGIN_NODE        0x1 /* Start of node, full name */
-#define OF_DT_END_NODE          0x2 /* End node */
-#define OF_DT_PROP              0x3 /* Property: name off, size, content */
-#define OF_DT_NOP               0x4 /* nop */
-#define OF_DT_END               0x9
-
-#define OF_DT_VERSION           0x10
-
 /*
  * This is what gets passed to the kernel by prom_init or kexec
  *
@@ -309,5 +311,6 @@ extern void __iomem *of_iomap(struct device_node *device, int index);
  */
 #include <linux/of.h>
 
+#endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
 #endif /* _ASM_MICROBLAZE_PROM_H */
diff --git a/arch/microblaze/include/asm/tlb.h b/arch/microblaze/include/asm/tlb.h
index c472d2801132..e8abd4a0349c 100644
--- a/arch/microblaze/include/asm/tlb.h
+++ b/arch/microblaze/include/asm/tlb.h
@@ -11,7 +11,7 @@
 #ifndef _ASM_MICROBLAZE_TLB_H
 #define _ASM_MICROBLAZE_TLB_H
 
-#define tlb_flush(tlb)  do {} while (0)
+#define tlb_flush(tlb)  flush_tlb_mm((tlb)->mm)
 
 #include <asm-generic/tlb.h>
 
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 65adad61e7e9..5431b4631a7a 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -189,7 +189,7 @@ extern long strnlen_user(const char *src, long count);
 
 #define __put_user(x, ptr)                                              \
 ({                                                                      \
-        __typeof__(*(ptr)) __gu_val = x;                                \
+        __typeof__(*(ptr)) volatile __gu_val = (x);                     \
         long __gu_err = 0;                                              \
         switch (sizeof(__gu_val)) {                                     \
         case 1:                                                         \
diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile
index f4a5e19a20eb..d487729683de 100644
--- a/arch/microblaze/kernel/Makefile
+++ b/arch/microblaze/kernel/Makefile
@@ -17,4 +17,4 @@ obj-$(CONFIG_HEART_BEAT)	+= heartbeat.o
 obj-$(CONFIG_MODULES)           += microblaze_ksyms.o module.o
 obj-$(CONFIG_MMU)               += misc.o
 
-obj-y   += entry$(MMUEXT).o
+obj-y   += entry$(MMU).o
diff --git a/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c
index 153f57c57b6d..c259786e7faa 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c
@@ -22,7 +22,7 @@
 
 #define CI(c, p) { ci->c = PVR_##p(pvr); }
 #define err_printk(x) \
-        early_printk("ERROR: Microblaze " x " - different for PVR and DTS\n");
+        early_printk("ERROR: Microblaze " x "-different for PVR and DTS\n");
 
 void set_cpuinfo_pvr_full(struct cpuinfo *ci, struct device_node *cpu)
 {
diff --git a/arch/microblaze/kernel/cpu/cpuinfo-static.c b/arch/microblaze/kernel/cpu/cpuinfo-static.c
index 450ca6bb828d..adb448f93d5f 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo-static.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo-static.c
@@ -18,7 +18,7 @@ static const char family_string[] = CONFIG_XILINX_MICROBLAZE0_FAMILY;
 static const char cpu_ver_string[] = CONFIG_XILINX_MICROBLAZE0_HW_VER;
 
 #define err_printk(x) \
-        early_printk("ERROR: Microblaze " x "- different for kernel and DTS\n");
+        early_printk("ERROR: Microblaze " x "-different for kernel and DTS\n");
 
 void __init set_cpuinfo_static(struct cpuinfo *ci, struct device_node *cpu)
 {
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
index a10bea119b94..c411c6757deb 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -26,6 +26,8 @@ const struct cpu_ver_key cpu_ver_lookup[] = {
         {"7.10.b", 0x09},
         {"7.10.c", 0x0a},
         {"7.10.d", 0x0b},
+        {"7.20.a", 0x0c},
+        {"7.20.b", 0x0d},
         /* FIXME There is no keycode defined in MBV for these versions */
         {"2.10.a", 0x10},
         {"3.00.a", 0x20},
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index e568d6ec621b..e41c6ce2a7be 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -31,6 +31,7 @@
 #include <linux/linkage.h>
 #include <asm/thread_info.h>
 #include <asm/page.h>
+#include <asm/prom.h>           /* for OF_DT_HEADER */
 
 #ifdef CONFIG_MMU
 #include <asm/setup.h> /* COMMAND_LINE_SIZE */
@@ -54,11 +55,19 @@ ENTRY(_start)
         andi    r1, r1, ~2
         mts     rmsr, r1
 
-/* save fdt to kernel location */
-/* r7 stores pointer to fdt blob */
-        beqi    r7, no_fdt_arg
+/* r7 may point to an FDT, or there may be one linked in.
+   if it's in r7, we've got to save it away ASAP.
+   We ensure r7 points to a valid FDT, just in case the bootloader
+   is broken or non-existent */
+        beqi    r7, no_fdt_arg                  /* NULL pointer?  don't copy */
+        lw      r11, r0, r7                     /* Does r7 point to a */
+        rsubi   r11, r11, OF_DT_HEADER          /* valid FDT? */
+        beqi    r11, _prepare_copy_fdt
+        or      r7, r0, r0              /* clear R7 when not valid DTB */
+        bnei    r11, no_fdt_arg                 /* No - get out of here */
+_prepare_copy_fdt:
         or      r11, r0, r0 /* incremment */
-        ori     r4, r0, TOPHYS(_fdt_start) /* save bram context */
+        ori     r4, r0, TOPHYS(_fdt_start)
         ori     r3, r0, (0x4000 - 4)
 _copy_fdt:
         lw      r12, r7, r11 /* r12 = r7 + r11 */
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 9d591cd74fc2..3288c9737671 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -74,6 +74,7 @@
 
 #include <asm/mmu.h>
 #include <asm/pgtable.h>
+#include <asm/signal.h>
 #include <asm/asm-offsets.h>
 
 /* Helpful Macros */
@@ -428,19 +429,9 @@ handle_unaligned_ex:
         mfs     r17, rbtr;      /* ESR[DS] set - return address in BTR */
         nop
 _no_delayslot:
-#endif
-
-#ifdef CONFIG_MMU
-        /* Check if unaligned address is last on a 4k page */
-                andi    r5, r4, 0xffc
-                xori    r5, r5, 0xffc
-                bnei    r5, _unaligned_ex2
-        _unaligned_ex1:
-                RESTORE_STATE;
-/* Another page must be accessed or physical address not in page table */
-                bri     unaligned_data_trap
-
-        _unaligned_ex2:
+        /* jump to high level unaligned handler */
+        RESTORE_STATE;
+        bri     unaligned_data_trap
 #endif
         andi    r6, r3, 0x3E0; /* Mask and extract the register operand */
         srl     r6, r6; /* r6 >> 5 */
@@ -450,45 +441,6 @@ _no_delayslot:
         srl     r6, r6;
         /* Store the register operand in a temporary location */
         sbi     r6, r0, TOPHYS(ex_reg_op);
-#ifdef CONFIG_MMU
-        /* Get physical address */
-        /* If we are faulting a kernel address, we have to use the
-         * kernel page tables.
-         */
-        ori     r5, r0, CONFIG_KERNEL_START
-        cmpu    r5, r4, r5
-        bgti    r5, _unaligned_ex3
-        ori     r5, r0, swapper_pg_dir
-        bri     _unaligned_ex4
-
-        /* Get the PGD for the current thread. */
-_unaligned_ex3: /* user thread */
-        addi    r5 ,CURRENT_TASK, TOPHYS(0); /* get current task address */
-        lwi     r5, r5, TASK_THREAD + PGDIR
-_unaligned_ex4:
-        tophys(r5,r5)
-        BSRLI(r6,r4,20)                 /* Create L1 (pgdir/pmd) address */
-        andi    r6, r6, 0xffc
-/* Assume pgdir aligned on 4K boundary, no need for "andi r5,r5,0xfffff003" */
-        or      r5, r5, r6
-        lwi     r6, r5, 0               /* Get L1 entry */
-        andi    r5, r6, 0xfffff000      /* Extract L2 (pte) base address. */
-        beqi    r5, _unaligned_ex1      /* Bail if no table */
-
-        tophys(r5,r5)
-        BSRLI(r6,r4,10)                 /* Compute PTE address */
-        andi    r6, r6, 0xffc
-        andi    r5, r5, 0xfffff003
-        or      r5, r5, r6
-        lwi     r5, r5, 0               /* Get Linux PTE */
-
-        andi    r6, r5, _PAGE_PRESENT
-        beqi    r6, _unaligned_ex1      /* Bail if no page */
-
-        andi    r5, r5, 0xfffff000      /* Extract RPN */
-        andi    r4, r4, 0x00000fff      /* Extract offset */
-        or      r4, r4, r5              /* Create physical address */
-#endif /* CONFIG_MMU */
 
         andi    r6, r3, 0x400; /* Extract ESR[S] */
         bnei    r6, ex_sw;
@@ -959,15 +911,15 @@ _unaligned_data_exception:
         andi    r6, r3, 0x800;  /* Extract ESR[W] - delay slot */
 ex_lw_vm:
         beqid   r6, ex_lhw_vm;
-        lbui    r5, r4, 0;      /* Exception address in r4 - delay slot */
+load1:  lbui    r5, r4, 0;      /* Exception address in r4 - delay slot */
 /* Load a word, byte-by-byte from destination address and save it in tmp space*/
         la      r6, r0, ex_tmp_data_loc_0;
         sbi     r5, r6, 0;
-        lbui    r5, r4, 1;
+load2:  lbui    r5, r4, 1;
         sbi     r5, r6, 1;
-        lbui    r5, r4, 2;
+load3:  lbui    r5, r4, 2;
         sbi     r5, r6, 2;
-        lbui    r5, r4, 3;
+load4:  lbui    r5, r4, 3;
         sbi     r5, r6, 3;
         brid    ex_lw_tail_vm;
 /* Get the destination register value into r3 - delay slot */
@@ -977,7 +929,7 @@ ex_lhw_vm:
          * save it in tmp space */
         la      r6, r0, ex_tmp_data_loc_0;
         sbi     r5, r6, 0;
-        lbui    r5, r4, 1;
+load5:  lbui    r5, r4, 1;
         sbi     r5, r6, 1;
         lhui    r3, r6, 0;      /* Get the destination register value into r3 */
 ex_lw_tail_vm:
@@ -996,22 +948,53 @@ ex_sw_tail_vm:
         swi     r3, r5, 0;      /* Get the word - delay slot */
         /* Store the word, byte-by-byte into destination address */
         lbui    r3, r5, 0;
-        sbi     r3, r4, 0;
+store1: sbi     r3, r4, 0;
         lbui    r3, r5, 1;
-        sbi     r3, r4, 1;
+store2: sbi     r3, r4, 1;
         lbui    r3, r5, 2;
-        sbi     r3, r4, 2;
+store3: sbi     r3, r4, 2;
         lbui    r3, r5, 3;
         brid    ret_from_exc;
-        sbi     r3, r4, 3;      /* Delay slot */
+store4: sbi     r3, r4, 3;      /* Delay slot */
 ex_shw_vm:
         /* Store the lower half-word, byte-by-byte into destination address */
         lbui    r3, r5, 2;
-        sbi     r3, r4, 0;
+store5: sbi     r3, r4, 0;
         lbui    r3, r5, 3;
         brid    ret_from_exc;
-        sbi     r3, r4, 1;      /* Delay slot */
+store6: sbi     r3, r4, 1;      /* Delay slot */
 ex_sw_end_vm:                   /* Exception handling of store word, ends. */
+
+/* We have to prevent cases that get/put_user macros get unaligned pointer
+ * to bad page area. We have to find out which origin instruction caused it
+ * and called fixup for that origin instruction not instruction in unaligned
+ * handler */
+ex_unaligned_fixup:
+        ori     r5, r7, 0 /* setup pointer to pt_regs */
+        lwi     r6, r7, PT_PC; /* faulting address is one instruction above */
+        addik   r6, r6, -4 /* for finding proper fixup */
+        swi     r6, r7, PT_PC; /* a save back it to PT_PC */
+        addik   r7, r0, SIGSEGV
+        /* call bad_page_fault for finding aligned fixup, fixup address is saved
+         * in PT_PC which is used as return address from exception */
+        la      r15, r0, ret_from_exc-8 /* setup return address */
+        brid    bad_page_fault
+        nop
+
+/* We prevent all load/store because it could failed any attempt to access */
+.section __ex_table,"a";
+        .word   load1,ex_unaligned_fixup;
+        .word   load2,ex_unaligned_fixup;
+        .word   load3,ex_unaligned_fixup;
+        .word   load4,ex_unaligned_fixup;
+        .word   load5,ex_unaligned_fixup;
+        .word   store1,ex_unaligned_fixup;
+        .word   store2,ex_unaligned_fixup;
+        .word   store3,ex_unaligned_fixup;
+        .word   store4,ex_unaligned_fixup;
+        .word   store5,ex_unaligned_fixup;
+        .word   store6,ex_unaligned_fixup;
+.previous;
 .end _unaligned_data_exception
 #endif /* CONFIG_MMU */
 
diff --git a/arch/microblaze/kernel/module.c b/arch/microblaze/kernel/module.c
index 51414171326f..5a45b1adfef1 100644
--- a/arch/microblaze/kernel/module.c
+++ b/arch/microblaze/kernel/module.c
@@ -57,7 +57,6 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
         Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
         Elf32_Sym *sym;
         unsigned long int *location;
-        unsigned long int locoffs;
         unsigned long int value;
 #if __GNUC__ < 4
         unsigned long int old_value;
@@ -113,10 +112,12 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
                         break;
 
                 case R_MICROBLAZE_64_PCREL:
-                        locoffs = (location[0] & 0xFFFF) << 16 |
+#if __GNUC__ < 4
+                        old_value = (location[0] & 0xFFFF) << 16 |
                                 (location[1] & 0xFFFF);
-                        value -= (unsigned long int)(location) + 4 +
-                                locoffs;
+                        value -= old_value;
+#endif
+                        value -= (unsigned long int)(location) + 4;
                         location[0] = (location[0] & 0xFFFF0000) |
                                         (value >> 16);
                         location[1] = (location[1] & 0xFFFF0000) |
@@ -125,6 +126,14 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
                                 value);
                         break;
 
+                case R_MICROBLAZE_32_PCREL_LO:
+                        pr_debug("R_MICROBLAZE_32_PCREL_LO\n");
+                        break;
+
+                case R_MICROBLAZE_64_NONE:
+                        pr_debug("R_MICROBLAZE_NONE\n");
+                        break;
+
                 case R_MICROBLAZE_NONE:
                         pr_debug("R_MICROBLAZE_NONE\n");
                         break;
@@ -133,7 +142,7 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
                         printk(KERN_ERR "module %s: "
                                 "Unknown relocation: %u\n",
                                 module->name,
-                                ELF32_R_TYPE(rela->r_info));
+                                ELF32_R_TYPE(rela[i].r_info));
                         return -ENOEXEC;
                 }
         }
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index 8709bea09604..2a97bf513b64 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -138,8 +138,12 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
         setup_early_printk(NULL);
 #endif
 
-        early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);
-        printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);
+        early_printk("Ramdisk addr 0x%08x, ", ram);
+        if (fdt)
+                early_printk("FDT at 0x%08x\n", fdt);
+        else
+                early_printk("Compiled-in FDT at 0x%08x\n",
+                                        (unsigned int)_fdt_start);
 
 #ifdef CONFIG_MTD_UCLINUX
         early_printk("Found romfs @ 0x%08x (0x%08x)\n",
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
index e000bce09b2b..b96f1682bb24 100644
--- a/arch/microblaze/kernel/sys_microblaze.c
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -33,105 +33,6 @@
 #include <linux/unistd.h>
 
 #include <asm/syscalls.h>
-/*
- * sys_ipc() is the de-multiplexer for the SysV IPC calls..
- *
- * This is really horribly ugly. This will be remove with new toolchain.
- */
-asmlinkage long
-sys_ipc(uint call, int first, int second, int third, void *ptr, long fifth)
-{
-        int version, ret;
-
-        version = call >> 16; /* hack for backward compatibility */
-        call &= 0xffff;
-
-        ret = -EINVAL;
-        switch (call) {
-        case SEMOP:
-                ret = sys_semop(first, (struct sembuf *)ptr, second);
-                break;
-        case SEMGET:
-                ret = sys_semget(first, second, third);
-                break;
-        case SEMCTL:
-        {
-                union semun fourth;
-
-                if (!ptr)
-                        break;
-                ret = (access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT)
-                                || (get_user(fourth.__pad, (void **)ptr)) ;
-                if (ret)
-                        break;
-                ret = sys_semctl(first, second, third, fourth);
-                break;
-        }
-        case MSGSND:
-                ret = sys_msgsnd(first, (struct msgbuf *) ptr, second, third);
-                break;
-        case MSGRCV:
-                switch (version) {
-                case 0: {
-                        struct ipc_kludge tmp;
-
-                        if (!ptr)
-                                break;
-                        ret = (access_ok(VERIFY_READ, ptr, sizeof(tmp))
-                                ? 0 : -EFAULT) || copy_from_user(&tmp,
-                                (struct ipc_kludge *) ptr, sizeof(tmp));
-                        if (ret)
-                                break;
-                        ret = sys_msgrcv(first, tmp.msgp, second, tmp.msgtyp,
-                                        third);
-                        break;
-                        }
-                default:
-                        ret = sys_msgrcv(first, (struct msgbuf *) ptr,
-                                        second, fifth, third);
-                        break;
-                }
-                break;
-        case MSGGET:
-                ret = sys_msgget((key_t) first, second);
-                break;
-        case MSGCTL:
-                ret = sys_msgctl(first, second, (struct msqid_ds *) ptr);
-                break;
-        case SHMAT:
-                switch (version) {
-                default: {
-                        ulong raddr;
-                        ret = access_ok(VERIFY_WRITE, (ulong *) third,
-                                        sizeof(ulong)) ? 0 : -EFAULT;
-                        if (ret)
-                                break;
-                        ret = do_shmat(first, (char *) ptr, second, &raddr);
-                        if (ret)
-                                break;
-                        ret = put_user(raddr, (ulong *) third);
-                        break;
-                        }
-                case 1: /* iBCS2 emulator entry point */
-                        if (!segment_eq(get_fs(), get_ds()))
-                                break;
-                        ret = do_shmat(first, (char *) ptr, second,
-                                        (ulong *) third);
-                        break;
-                }
-                break;
-        case SHMDT:
-                ret = sys_shmdt((char *)ptr);
-                break;
-        case SHMGET:
-                ret = sys_shmget(first, second, third);
-                break;
-        case SHMCTL:
-                ret = sys_shmctl(first, second, (struct shmid_ds *) ptr);
-                break;
-        }
-        return ret;
-}
 
 asmlinkage long microblaze_vfork(struct pt_regs *regs)
 {
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
index 31b32a6c5f4e..216db817beb6 100644
--- a/arch/microblaze/kernel/syscall_table.S
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -121,7 +121,7 @@ ENTRY(sys_call_table)
         .long sys_wait4
         .long sys_swapoff               /* 115 */
         .long sys_sysinfo
-        .long sys_ipc
+        .long sys_ni_syscall            /* old sys_ipc */
         .long sys_fsync
         .long sys_ni_syscall            /* sys_sigreturn_wrapper */
         .long sys_clone         /* 120 */
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index 956607a63f4c..d9d249a66ff2 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -69,7 +69,7 @@ static int store_updates_sp(struct pt_regs *regs)
  * It is called from do_page_fault above and from some of the procedures
  * in traps.c.
  */
-static void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
+void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
 {
         const struct exception_table_entry *fixup;
 /* MS: no context */
@@ -122,15 +122,10 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
         }
 #endif /* CONFIG_KGDB */
 
-        if (in_atomic() || mm == NULL) {
-                /* FIXME */
-                if (kernel_mode(regs)) {
-                        printk(KERN_EMERG
-                                "Page fault in kernel mode - Oooou!!! pid %d\n",
-                                current->pid);
-                        _exception(SIGSEGV, regs, code, address);
-                        return;
-                }
+        if (in_atomic() || !mm) {
+                if (kernel_mode(regs))
+                        goto bad_area_nosemaphore;
+
                 /* in_atomic() in user mode is really bad,
                    as is current->mm == NULL. */
                 printk(KERN_EMERG "Page fault in user mode with "