Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze

* 'next' of git://git.monstr.eu/linux-2.6-microblaze: (33 commits)
  microblaze: Do not copy reset vectors/manual reset vector setup
  microblaze: Fix _reset function
  microblaze: Fix microblaze init vectors
  microblaze: Fix circular headers dependency when ftrace is enabled.
  microblaze: Fix typo in Kconfig
  microblaze: Add missing export symbols for lib functions
  microblaze: Fix /dev/zero corruption from __clear_user()
  microblaze: Convert irq_chip to new functions
  microblaze: Select GENERIC_HARDIRQS_NO_DEPRECATED
  microblaze: Remove stale irq_chip.end
  microblaze: Fix sparse warnings - signal.c
  microblaze: Fix sparse warning - fault.c
  microblaze: Fix missing microblaze specific syscalls declaration
  microblaze: Fix sparse warnings - cache.c
  microblaze: Fix sparse warning - cpuinfo.h
  microblaze: Fix sparse warning - unwind.c
  microblaze: Fix sparse warning - consistent_alloc function
  microblaze: Fix sparse warnings - ptrace
  microblaze: Fix sparse warning - sw_exceptions
  microblaze: Fix sparse warning - timer.c
  ...

20 files changed, 287 insertions, 252 deletions

diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
index 109876e..cf0afd9 100644
--- a/arch/microblaze/kernel/cpu/cache.c
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -519,7 +519,7 @@ static void __flush_dcache_range_wb(unsigned long start, unsigned long end)
 struct scache *mbc;
 
 /* new wb cache model */
-const struct scache wb_msr = {
+static const struct scache wb_msr = {
 	.ie = __enable_icache_msr,
 	.id = __disable_icache_msr,
 	.ifl = __flush_icache_all_noirq,
@@ -535,7 +535,7 @@ const struct scache wb_msr = {
 };
 
 /* There is only difference in ie, id, de, dd functions */
-const struct scache wb_nomsr = {
+static const struct scache wb_nomsr = {
 	.ie = __enable_icache_nomsr,
 	.id = __disable_icache_nomsr,
 	.ifl = __flush_icache_all_noirq,
@@ -551,7 +551,7 @@ const struct scache wb_nomsr = {
 };
 
 /* Old wt cache model with disabling irq and turn off cache */
-const struct scache wt_msr = {
+static const struct scache wt_msr = {
 	.ie = __enable_icache_msr,
 	.id = __disable_icache_msr,
 	.ifl = __flush_icache_all_msr_irq,
@@ -566,7 +566,7 @@ const struct scache wt_msr = {
 	.dinr = __invalidate_dcache_range_msr_irq_wt,
 };
 
-const struct scache wt_nomsr = {
+static const struct scache wt_nomsr = {
 	.ie = __enable_icache_nomsr,
 	.id = __disable_icache_nomsr,
 	.ifl = __flush_icache_all_nomsr_irq,
@@ -582,7 +582,7 @@ const struct scache wt_nomsr = {
 };
 
 /* New wt cache model for newer Microblaze versions */
-const struct scache wt_msr_noirq = {
+static const struct scache wt_msr_noirq = {
 	.ie = __enable_icache_msr,
 	.id = __disable_icache_msr,
 	.ifl = __flush_icache_all_noirq,
@@ -597,7 +597,7 @@ const struct scache wt_msr_noirq = {
 	.dinr = __invalidate_dcache_range_nomsr_wt,
 };
 
-const struct scache wt_nomsr_noirq = {
+static const struct scache wt_nomsr_noirq = {
 	.ie = __enable_icache_nomsr,
 	.id = __disable_icache_nomsr,
 	.ifl = __flush_icache_all_noirq,
@@ -624,7 +624,7 @@ void microblaze_cache_init(void)
 		if (cpuinfo.dcache_wb) {
 			INFO("wb_msr");
 			mbc = (struct scache *)&wb_msr;
-			if (cpuinfo.ver_code < CPUVER_7_20_D) {
+			if (cpuinfo.ver_code <= CPUVER_7_20_D) {
 				/* MS: problem with signal handling - hw bug */
 				INFO("WB won't work properly");
 			}
@@ -641,7 +641,7 @@ void microblaze_cache_init(void)
 		if (cpuinfo.dcache_wb) {
 			INFO("wb_nomsr");
 			mbc = (struct scache *)&wb_nomsr;
-			if (cpuinfo.ver_code < CPUVER_7_20_D) {
+			if (cpuinfo.ver_code <= CPUVER_7_20_D) {
 				/* MS: problem with signal handling - hw bug */
 				INFO("WB won't work properly");
 			}
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
index 2c309fc..c1640c5 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -33,6 +33,7 @@ const struct cpu_ver_key cpu_ver_lookup[] = {
 	{"7.30.b", 0x11},
 	{"8.00.a", 0x12},
 	{"8.00.b", 0x13},
+	{"8.10.a", 0x14},
 	{NULL, 0},
 };
 
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index 79c7465..393e6b2 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -26,6 +26,7 @@ static inline void __dma_sync_page(unsigned long paddr, unsigned long offset,
 {
 	switch (direction) {
 	case DMA_TO_DEVICE:
+	case DMA_BIDIRECTIONAL:
 		flush_dcache_range(paddr + offset, paddr + offset + size);
 		break;
 	case DMA_FROM_DEVICE:
diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
index ca84368..34b526f 100644
--- a/arch/microblaze/kernel/entry-nommu.S
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -115,7 +115,7 @@ ENTRY(_interrupt)
 	/* restore r31 */
 	lwi	r31, r0, PER_CPU(CURRENT_SAVE)
 	/* prepare the link register, the argument and jump */
-	la	r15, r0, ret_from_intr - 8
+	addik	r15, r0, ret_from_intr - 8
 	addk	r6, r0, r15
 	braid	do_IRQ
 	add	r5, r0, r1
@@ -283,7 +283,7 @@ ENTRY(_user_exception)
 	add	r12, r12, r12			/* convert num -> ptr */
 	add	r12, r12, r12
 	lwi	r12, r12, sys_call_table	/* Get function pointer */
-	la	r15, r0, ret_to_user-8		/* set return address */
+	addik	r15, r0, ret_to_user-8		/* set return address */
 	bra	r12				/* Make the system call. */
 	bri	0				/* won't reach here */
 1:
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 41c30cd..ca15bc5 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -33,11 +33,14 @@
 
 #undef DEBUG
 
-/* The size of a state save frame. */
-#define STATE_SAVE_SIZE		(PT_SIZE + STATE_SAVE_ARG_SPACE)
-
-/* The offset of the struct pt_regs in a `state save frame' on the stack. */
-#define PTO	STATE_SAVE_ARG_SPACE /* 24 the space for args */
+#ifdef DEBUG
+/* Create space for syscalls counting. */
+.section .data
+.global syscall_debug_table
+.align 4
+syscall_debug_table:
+	.space	(__NR_syscalls * 4)
+#endif /* DEBUG */
 
 #define C_ENTRY(name)	.globl name; .align 4; name
 
@@ -172,72 +175,72 @@
 1:
 
 #define SAVE_REGS \
-	swi	r2, r1, PTO+PT_R2;	/* Save SDA */			\
-	swi	r3, r1, PTO+PT_R3;					\
-	swi	r4, r1, PTO+PT_R4;					\
-	swi	r5, r1, PTO+PT_R5;					\
-	swi	r6, r1, PTO+PT_R6;					\
-	swi	r7, r1, PTO+PT_R7;					\
-	swi	r8, r1, PTO+PT_R8;					\
-	swi	r9, r1, PTO+PT_R9;					\
-	swi	r10, r1, PTO+PT_R10;					\
-	swi	r11, r1, PTO+PT_R11;	/* save clobbered regs after rval */\
-	swi	r12, r1, PTO+PT_R12;					\
-	swi	r13, r1, PTO+PT_R13;	/* Save SDA2 */			\
-	swi	r14, r1, PTO+PT_PC;	/* PC, before IRQ/trap */	\
-	swi	r15, r1, PTO+PT_R15;	/* Save LP */			\
-	swi	r16, r1, PTO+PT_R16;					\
-	swi	r17, r1, PTO+PT_R17;					\
-	swi	r18, r1, PTO+PT_R18;	/* Save asm scratch reg */	\
-	swi	r19, r1, PTO+PT_R19;					\
-	swi	r20, r1, PTO+PT_R20;					\
-	swi	r21, r1, PTO+PT_R21;					\
-	swi	r22, r1, PTO+PT_R22;					\
-	swi	r23, r1, PTO+PT_R23;					\
-	swi	r24, r1, PTO+PT_R24;					\
-	swi	r25, r1, PTO+PT_R25;					\
-	swi	r26, r1, PTO+PT_R26;					\
-	swi	r27, r1, PTO+PT_R27;					\
-	swi	r28, r1, PTO+PT_R28;					\
-	swi	r29, r1, PTO+PT_R29;					\
-	swi	r30, r1, PTO+PT_R30;					\
-	swi	r31, r1, PTO+PT_R31;	/* Save current task reg */	\
+	swi	r2, r1, PT_R2;	/* Save SDA */			\
+	swi	r3, r1, PT_R3;					\
+	swi	r4, r1, PT_R4;					\
+	swi	r5, r1, PT_R5;					\
+	swi	r6, r1, PT_R6;					\
+	swi	r7, r1, PT_R7;					\
+	swi	r8, r1, PT_R8;					\
+	swi	r9, r1, PT_R9;					\
+	swi	r10, r1, PT_R10;					\
+	swi	r11, r1, PT_R11;	/* save clobbered regs after rval */\
+	swi	r12, r1, PT_R12;					\
+	swi	r13, r1, PT_R13;	/* Save SDA2 */			\
+	swi	r14, r1, PT_PC;	/* PC, before IRQ/trap */	\
+	swi	r15, r1, PT_R15;	/* Save LP */			\
+	swi	r16, r1, PT_R16;					\
+	swi	r17, r1, PT_R17;					\
+	swi	r18, r1, PT_R18;	/* Save asm scratch reg */	\
+	swi	r19, r1, PT_R19;					\
+	swi	r20, r1, PT_R20;					\
+	swi	r21, r1, PT_R21;					\
+	swi	r22, r1, PT_R22;					\
+	swi	r23, r1, PT_R23;					\
+	swi	r24, r1, PT_R24;					\
+	swi	r25, r1, PT_R25;					\
+	swi	r26, r1, PT_R26;					\
+	swi	r27, r1, PT_R27;					\
+	swi	r28, r1, PT_R28;					\
+	swi	r29, r1, PT_R29;					\
+	swi	r30, r1, PT_R30;					\
+	swi	r31, r1, PT_R31;	/* Save current task reg */	\
 	mfs	r11, rmsr;		/* save MSR */			\
-	swi	r11, r1, PTO+PT_MSR;
+	swi	r11, r1, PT_MSR;
 
 #define RESTORE_REGS \
-	lwi	r11, r1, PTO+PT_MSR;					\
+	lwi	r11, r1, PT_MSR;					\
 	mts	rmsr , r11;						\
-	lwi	r2, r1, PTO+PT_R2;	/* restore SDA */		\
-	lwi	r3, r1, PTO+PT_R3;					\
-	lwi	r4, r1, PTO+PT_R4;					\
-	lwi	r5, r1, PTO+PT_R5;					\
-	lwi	r6, r1, PTO+PT_R6;					\
-	lwi	r7, r1, PTO+PT_R7;					\
-	lwi	r8, r1, PTO+PT_R8;					\
-	lwi	r9, r1, PTO+PT_R9;					\
-	lwi	r10, r1, PTO+PT_R10;					\
-	lwi	r11, r1, PTO+PT_R11;	/* restore clobbered regs after rval */\
-	lwi	r12, r1, PTO+PT_R12;					\
-	lwi	r13, r1, PTO+PT_R13;	/* restore SDA2 */		\
-	lwi	r14, r1, PTO+PT_PC;	/* RESTORE_LINK PC, before IRQ/trap */\
-	lwi	r15, r1, PTO+PT_R15;	/* restore LP */		\
-	lwi	r16, r1, PTO+PT_R16;					\
-	lwi	r17, r1, PTO+PT_R17;					\
-	lwi	r18, r1, PTO+PT_R18;	/* restore asm scratch reg */	\
-	lwi	r19, r1, PTO+PT_R19;					\
-	lwi	r20, r1, PTO+PT_R20;					\
-	lwi	r21, r1, PTO+PT_R21;					\
-	lwi	r22, r1, PTO+PT_R22;					\
-	lwi	r23, r1, PTO+PT_R23;					\
-	lwi	r24, r1, PTO+PT_R24;					\
-	lwi	r25, r1, PTO+PT_R25;					\
-	lwi	r26, r1, PTO+PT_R26;					\
-	lwi	r27, r1, PTO+PT_R27;					\
-	lwi	r28, r1, PTO+PT_R28;					\
-	lwi	r29, r1, PTO+PT_R29;					\
-	lwi	r30, r1, PTO+PT_R30;					\
-	lwi	r31, r1, PTO+PT_R31;	/* Restore cur task reg */
+	lwi	r2, r1, PT_R2;	/* restore SDA */		\
+	lwi	r3, r1, PT_R3;					\
+	lwi	r4, r1, PT_R4;					\
+	lwi	r5, r1, PT_R5;					\
+	lwi	r6, r1, PT_R6;					\
+	lwi	r7, r1, PT_R7;					\
+	lwi	r8, r1, PT_R8;					\
+	lwi	r9, r1, PT_R9;					\
+	lwi	r10, r1, PT_R10;					\
+	lwi	r11, r1, PT_R11;	/* restore clobbered regs after rval */\
+	lwi	r12, r1, PT_R12;					\
+	lwi	r13, r1, PT_R13;	/* restore SDA2 */		\
+	lwi	r14, r1, PT_PC;	/* RESTORE_LINK PC, before IRQ/trap */\
+	lwi	r15, r1, PT_R15;	/* restore LP */		\
+	lwi	r16, r1, PT_R16;					\
+	lwi	r17, r1, PT_R17;					\
+	lwi	r18, r1, PT_R18;	/* restore asm scratch reg */	\
+	lwi	r19, r1, PT_R19;					\
+	lwi	r20, r1, PT_R20;					\
+	lwi	r21, r1, PT_R21;					\
+	lwi	r22, r1, PT_R22;					\
+	lwi	r23, r1, PT_R23;					\
+	lwi	r24, r1, PT_R24;					\
+	lwi	r25, r1, PT_R25;					\
+	lwi	r26, r1, PT_R26;					\
+	lwi	r27, r1, PT_R27;					\
+	lwi	r28, r1, PT_R28;					\
+	lwi	r29, r1, PT_R29;					\
+	lwi	r30, r1, PT_R30;					\
+	lwi	r31, r1, PT_R31;	/* Restore cur task reg */
 
 #define SAVE_STATE	\
 	swi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* save stack */	\
@@ -250,11 +253,11 @@
 	lwi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP));			\
 	/* FIXME: I can add these two lines to one */			\
 	/* tophys(r1,r1); */						\
-	/* addik	r1, r1, -STATE_SAVE_SIZE; */			\
-	addik	r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE; \
+	/* addik	r1, r1, -PT_SIZE; */				\
+	addik	r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - PT_SIZE; \
 	SAVE_REGS							\
 	brid	2f;							\
-	swi	r1, r1, PTO+PT_MODE; 	 				\
+	swi	r1, r1, PT_MODE; 	 				\
 1:	/* User-mode state save.  */					\
 	lwi	r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\
 	tophys(r1,r1);							\
@@ -262,12 +265,12 @@
 	/* MS these three instructions can be added to one */		\
 	/* addik	r1, r1, THREAD_SIZE; */				\
 	/* tophys(r1,r1); */						\
-	/* addik	r1, r1, -STATE_SAVE_SIZE; */			\
-	addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE; \
+	/* addik	r1, r1, -PT_SIZE; */			\
+	addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - PT_SIZE; \
 	SAVE_REGS							\
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));			\
-	swi	r11, r1, PTO+PT_R1; /* Store user SP.  */		\
-	swi	r0, r1, PTO + PT_MODE; /* Was in user-mode.  */		\
+	swi	r11, r1, PT_R1; /* Store user SP.  */		\
+	swi	r0, r1, PT_MODE; /* Was in user-mode.  */		\
 	/* MS: I am clearing UMS even in case when I come from kernel space */ \
 	clear_ums; 							\
 2:	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
@@ -299,10 +302,10 @@ C_ENTRY(_user_exception):
 	lwi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
 	tophys(r1,r1);
 
-	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
+	addik	r1, r1, -PT_SIZE; /* Make room on the stack. */
 	SAVE_REGS
 
-	swi	r1, r1, PTO + PT_MODE; /* pt_regs -> kernel mode */
+	swi	r1, r1, PT_MODE; /* pt_regs -> kernel mode */
 	brid	2f;
 	nop;				/* Fill delay slot */
 
@@ -315,18 +318,18 @@ C_ENTRY(_user_exception):
 	addik	r1, r1, THREAD_SIZE;
 	tophys(r1,r1);
 
-	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack.  */
+	addik	r1, r1, -PT_SIZE; /* Make room on the stack.  */
 	SAVE_REGS
-	swi	r0, r1, PTO + PT_R3
-	swi	r0, r1, PTO + PT_R4
+	swi	r0, r1, PT_R3
+	swi	r0, r1, PT_R4
 
-	swi	r0, r1, PTO + PT_MODE;			/* Was in user-mode. */
+	swi	r0, r1, PT_MODE;			/* Was in user-mode. */
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
-	swi	r11, r1, PTO+PT_R1;		/* Store user SP.  */
+	swi	r11, r1, PT_R1;		/* Store user SP.  */
 	clear_ums;
 2:	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
 	/* Save away the syscall number.  */
-	swi	r12, r1, PTO+PT_R0;
+	swi	r12, r1, PT_R0;
 	tovirt(r1,r1)
 
 /* where the trap should return need -8 to adjust for rtsd r15, 8*/
@@ -345,18 +348,18 @@ C_ENTRY(_user_exception):
 	beqi	r11, 4f
 
 	addik	r3, r0, -ENOSYS
-	swi	r3, r1, PTO + PT_R3
+	swi	r3, r1, PT_R3
 	brlid	r15, do_syscall_trace_enter
-	addik	r5, r1, PTO + PT_R0
+	addik	r5, r1, PT_R0
 
 	# do_syscall_trace_enter returns the new syscall nr.
 	addk	r12, r0, r3
-	lwi	r5, r1, PTO+PT_R5;
-	lwi	r6, r1, PTO+PT_R6;
-	lwi	r7, r1, PTO+PT_R7;
-	lwi	r8, r1, PTO+PT_R8;
-	lwi	r9, r1, PTO+PT_R9;
-	lwi	r10, r1, PTO+PT_R10;
+	lwi	r5, r1, PT_R5;
+	lwi	r6, r1, PT_R6;
+	lwi	r7, r1, PT_R7;
+	lwi	r8, r1, PT_R8;
+	lwi	r9, r1, PT_R9;
+	lwi	r10, r1, PT_R10;
 4:
 /* Jump to the appropriate function for the system call number in r12
  * (r12 is not preserved), or return an error if r12 is not valid.
@@ -371,10 +374,14 @@ C_ENTRY(_user_exception):
 	add	r12, r12, r12;
 
 #ifdef DEBUG
-	/* Trac syscalls and stored them to r0_ram */
-	lwi	r3, r12, 0x400 + r0_ram
+	/* Trac syscalls and stored them to syscall_debug_table */
+	/* The first syscall location stores total syscall number */
+	lwi	r3, r0, syscall_debug_table
+	addi	r3, r3, 1
+	swi	r3, r0, syscall_debug_table
+	lwi	r3, r12, syscall_debug_table
 	addi	r3, r3, 1
-	swi	r3, r12, 0x400 + r0_ram
+	swi	r3, r12, syscall_debug_table
 #endif
 
 	# Find and jump into the syscall handler.
@@ -391,10 +398,10 @@ C_ENTRY(_user_exception):
 /* Entry point used to return from a syscall/trap */
 /* We re-enable BIP bit before state restore */
 C_ENTRY(ret_from_trap):
-	swi	r3, r1, PTO + PT_R3
-	swi	r4, r1, PTO + PT_R4
+	swi	r3, r1, PT_R3
+	swi	r4, r1, PT_R4
 
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 /* See if returning to kernel mode, if so, skip resched &c.  */
 	bnei	r11, 2f;
 	/* We're returning to user mode, so check for various conditions that
@@ -406,7 +413,7 @@ C_ENTRY(ret_from_trap):
 	beqi	r11, 1f
 
 	brlid	r15, do_syscall_trace_leave
-	addik	r5, r1, PTO + PT_R0
+	addik	r5, r1, PT_R0
 1:
 	/* We're returning to user mode, so check for various conditions that
 	 * trigger rescheduling. */
@@ -426,7 +433,7 @@ C_ENTRY(ret_from_trap):
 	andi	r11, r11, _TIF_SIGPENDING;
 	beqi	r11, 1f;		/* Signals to handle, handle them */
 
-	addik	r5, r1, PTO;		/* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	addi	r7, r0, 1;		/* Arg 3: int in_syscall */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0;		/* Arg 2: sigset_t *oldset */
@@ -437,7 +444,7 @@ C_ENTRY(ret_from_trap):
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 	lwi	r1, r1, PT_R1 - PT_SIZE;/* Restore user stack pointer. */
 	bri	6f;
 
@@ -446,7 +453,7 @@ C_ENTRY(ret_from_trap):
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 	tovirt(r1,r1);
 6:
 TRAP_return:		/* Make global symbol for debugging */
@@ -459,8 +466,8 @@ TRAP_return:		/* Make global symbol for debugging */
 
 C_ENTRY(sys_fork_wrapper):
 	addi	r5, r0, SIGCHLD			/* Arg 0: flags */
-	lwi	r6, r1, PTO+PT_R1	/* Arg 1: child SP (use parent's) */
-	addik	r7, r1, PTO			/* Arg 2: parent context */
+	lwi	r6, r1, PT_R1	/* Arg 1: child SP (use parent's) */
+	addik	r7, r1, 0			/* Arg 2: parent context */
 	add	r8. r0, r0			/* Arg 3: (unused) */
 	add	r9, r0, r0;			/* Arg 4: (unused) */
 	brid	do_fork		/* Do real work (tail-call) */
@@ -480,12 +487,12 @@ C_ENTRY(ret_from_fork):
 
 C_ENTRY(sys_vfork):
 	brid	microblaze_vfork	/* Do real work (tail-call) */
-	addik	r5, r1, PTO
+	addik	r5, r1, 0
 
 C_ENTRY(sys_clone):
 	bnei	r6, 1f;			/* See if child SP arg (arg 1) is 0. */
-	lwi	r6, r1, PTO + PT_R1;	/* If so, use paret's stack ptr */
-1:	addik	r7, r1, PTO;			/* Arg 2: parent context */
+	lwi	r6, r1, PT_R1;	/* If so, use paret's stack ptr */
+1:	addik	r7, r1, 0;			/* Arg 2: parent context */
 	add	r8, r0, r0;			/* Arg 3: (unused) */
 	add	r9, r0, r0;			/* Arg 4: (unused) */
 	brid	do_fork		/* Do real work (tail-call) */
@@ -493,11 +500,11 @@ C_ENTRY(sys_clone):
 
 C_ENTRY(sys_execve):
 	brid	microblaze_execve;	/* Do real work (tail-call).*/
-	addik	r8, r1, PTO;		/* add user context as 4th arg */
+	addik	r8, r1, 0;		/* add user context as 4th arg */
 
 C_ENTRY(sys_rt_sigreturn_wrapper):
 	brid	sys_rt_sigreturn	/* Do real work */
-	addik	r5, r1, PTO;		/* add user context as 1st arg */
+	addik	r5, r1, 0;		/* add user context as 1st arg */
 
 /*
  * HW EXCEPTION rutine start
@@ -508,7 +515,7 @@ C_ENTRY(full_exception_trap):
 	addik	r17, r17, -4
 	SAVE_STATE /* Save registers */
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* FIXME this can be store directly in PT_ESR reg.
 	 * I tested it but there is a fault */
@@ -518,7 +525,7 @@ C_ENTRY(full_exception_trap):
 	mfs	r7, rfsr;		/* save FSR */
 	mts	rfsr, r0;	/* Clear sticky fsr */
 	rted	r0, full_exception
-	addik	r5, r1, PTO		 /* parameter struct pt_regs * regs */
+	addik	r5, r1, 0		 /* parameter struct pt_regs * regs */
 
 /*
  * Unaligned data trap.
@@ -544,14 +551,14 @@ C_ENTRY(unaligned_data_trap):
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
 	SAVE_STATE		/* Save registers.*/
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
 	addik	r15, r0, ret_from_exc-8
 	mfs	r3, resr		/* ESR */
 	mfs	r4, rear		/* EAR */
 	rtbd	r0, _unaligned_data_exception
-	addik	r7, r1, PTO		/* parameter struct pt_regs * regs */
+	addik	r7, r1, 0		/* parameter struct pt_regs * regs */
 
 /*
  * Page fault traps.
@@ -574,30 +581,30 @@ C_ENTRY(unaligned_data_trap):
 C_ENTRY(page_fault_data_trap):
 	SAVE_STATE		/* Save registers.*/
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
 	addik	r15, r0, ret_from_exc-8
 	mfs	r6, rear		/* parameter unsigned long address */
 	mfs	r7, resr		/* parameter unsigned long error_code */
 	rted	r0, do_page_fault
-	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */
+	addik	r5, r1, 0		/* parameter struct pt_regs * regs */
 
 C_ENTRY(page_fault_instr_trap):
 	SAVE_STATE		/* Save registers.*/
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
 	addik	r15, r0, ret_from_exc-8
 	mfs	r6, rear		/* parameter unsigned long address */
 	ori	r7, r0, 0		/* parameter unsigned long error_code */
 	rted	r0, do_page_fault
-	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */
+	addik	r5, r1, 0		/* parameter struct pt_regs * regs */
 
 /* Entry point used to return from an exception.  */
 C_ENTRY(ret_from_exc):
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;		/* See if returning to kernel mode, */
 					/* ... if so, skip resched &c.  */
 
@@ -629,7 +636,7 @@ C_ENTRY(ret_from_exc):
 	 * complete register state.  Here we save anything not saved by
 	 * the normal entry sequence, so that it may be safely restored
 	 * (in a possibly modified form) after do_signal returns. */
-	addik	r5, r1, PTO;		/* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	addi	r7, r0, 0;		/* Arg 3: int in_syscall */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0;		/* Arg 2: sigset_t *oldset */
@@ -641,7 +648,7 @@ C_ENTRY(ret_from_exc):
 	tophys(r1,r1);
 
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 
 	lwi	r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer. */
 	bri	6f;
@@ -650,7 +657,7 @@ C_ENTRY(ret_from_exc):
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 
 	tovirt(r1,r1);
 6:
@@ -683,10 +690,10 @@ C_ENTRY(_interrupt):
 	tophys(r1,r1); /* MS: I have in r1 physical address where stack is */
 	/* save registers */
 /* MS: Make room on the stack -> activation record */
-	addik	r1, r1, -STATE_SAVE_SIZE;
+	addik	r1, r1, -PT_SIZE;
 	SAVE_REGS
 	brid	2f;
-	swi	r1, r1, PTO + PT_MODE; /* 0 - user mode, 1 - kernel mode */
+	swi	r1, r1, PT_MODE; /* 0 - user mode, 1 - kernel mode */
 1:
 /* User-mode state save. */
  /* MS: get the saved current */
@@ -696,23 +703,23 @@ C_ENTRY(_interrupt):
 	addik	r1, r1, THREAD_SIZE;
 	tophys(r1,r1);
 	/* save registers */
-	addik	r1, r1, -STATE_SAVE_SIZE;
+	addik	r1, r1, -PT_SIZE;
 	SAVE_REGS
 	/* calculate mode */
-	swi	r0, r1, PTO + PT_MODE;
+	swi	r0, r1, PT_MODE;
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
-	swi	r11, r1, PTO+PT_R1;
+	swi	r11, r1, PT_R1;
 	clear_ums;
 2:
 	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
 	tovirt(r1,r1)
 	addik	r15, r0, irq_call;
 irq_call:rtbd	r0, do_IRQ;
-	addik	r5, r1, PTO;
+	addik	r5, r1, 0;
 
 /* MS: we are in virtual mode */
 ret_from_irq:
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;
 
 	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;
@@ -729,7 +736,7 @@ ret_from_irq:
 	beqid	r11, no_intr_resched
 /* Handle a signal return; Pending signals should be in r18. */
 	addi	r7, r0, 0; /* Arg 3: int in_syscall */
-	addik	r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0; /* Arg 1: struct pt_regs *regs */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0; /* Arg 2: sigset_t *oldset */
 
@@ -741,7 +748,7 @@ no_intr_resched:
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS
-	addik	r1, r1, STATE_SAVE_SIZE /* MS: Clean up stack space. */
+	addik	r1, r1, PT_SIZE /* MS: Clean up stack space. */
 	lwi	r1, r1, PT_R1 - PT_SIZE;
 	bri	6f;
 /* MS: Return to kernel state. */
@@ -769,7 +776,7 @@ restore:
 	VM_OFF /* MS: turn off MMU */
 	tophys(r1,r1)
 	RESTORE_REGS
-	addik	r1, r1, STATE_SAVE_SIZE	/* MS: Clean up stack space. */
+	addik	r1, r1, PT_SIZE	/* MS: Clean up stack space. */
 	tovirt(r1,r1);
 6:
 IRQ_return: /* MS: Make global symbol for debugging */
@@ -792,29 +799,29 @@ C_ENTRY(_debug_exception):
 	lwi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
 
 	/* BIP bit is set on entry, no interrupts can occur */
-	addik   r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE;
+	addik   r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - PT_SIZE;
 	SAVE_REGS;
 	/* save all regs to pt_reg structure */
-	swi	r0, r1, PTO+PT_R0;	/* R0 must be saved too */
-	swi	r14, r1, PTO+PT_R14	/* rewrite saved R14 value */
-	swi	r16, r1, PTO+PT_PC; /* PC and r16 are the same */
+	swi	r0, r1, PT_R0;	/* R0 must be saved too */
+	swi	r14, r1, PT_R14	/* rewrite saved R14 value */
+	swi	r16, r1, PT_PC; /* PC and r16 are the same */
 	/* save special purpose registers to pt_regs */
 	mfs	r11, rear;
-	swi	r11, r1, PTO+PT_EAR;
+	swi	r11, r1, PT_EAR;
 	mfs	r11, resr;
-	swi	r11, r1, PTO+PT_ESR;
+	swi	r11, r1, PT_ESR;
 	mfs	r11, rfsr;
-	swi	r11, r1, PTO+PT_FSR;
+	swi	r11, r1, PT_FSR;
 
 	/* stack pointer is in physical address at it is decrease
-	 * by STATE_SAVE_SIZE but we need to get correct R1 value */
-	addik   r11, r1, CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR + STATE_SAVE_SIZE;
-	swi	r11, r1, PTO+PT_R1
+	 * by PT_SIZE but we need to get correct R1 value */
+	addik   r11, r1, CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR + PT_SIZE;
+	swi	r11, r1, PT_R1
 	/* MS: r31 - current pointer isn't changed */
 	tovirt(r1,r1)
 #ifdef CONFIG_KGDB
-	addi	r5, r1, PTO /* pass pt_reg address as the first arg */
-	la	r15, r0, dbtrap_call; /* return address */
+	addi	r5, r1, 0 /* pass pt_reg address as the first arg */
+	addik	r15, r0, dbtrap_call; /* return address */
 	rtbd	r0, microblaze_kgdb_break
 	nop;
 #endif
@@ -829,16 +836,16 @@ C_ENTRY(_debug_exception):
 	addik	r1, r1, THREAD_SIZE;	/* calculate kernel stack pointer */
 	tophys(r1,r1);
 
-	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack.  */
+	addik	r1, r1, -PT_SIZE; /* Make room on the stack.  */
 	SAVE_REGS;
-	swi	r16, r1, PTO+PT_PC;	/* Save LP */
-	swi	r0, r1, PTO + PT_MODE; /* Was in user-mode.  */
+	swi	r16, r1, PT_PC;	/* Save LP */
+	swi	r0, r1, PT_MODE; /* Was in user-mode.  */
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
-	swi	r11, r1, PTO+PT_R1; /* Store user SP.  */
+	swi	r11, r1, PT_R1; /* Store user SP.  */
 	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
 	tovirt(r1,r1)
 	set_vms;
-	addik	r5, r1, PTO;
+	addik	r5, r1, 0;
 	addik	r15, r0, dbtrap_call;
 dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	rtbd	r0, sw_exception
@@ -846,7 +853,7 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 
 	/* MS: The first instruction for the second part of the gdb/kgdb */
 	set_bip; /* Ints masked for state restore */
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;
 /* MS: Return to user space - gdb */
 	/* Get current task ptr into r11 */
@@ -865,7 +872,7 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	andi	r11, r11, _TIF_SIGPENDING;
 	beqi	r11, 1f;		/* Signals to handle, handle them */
 
-	addik	r5, r1, PTO;		/* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	addi  r7, r0, 0;	/* Arg 3: int in_syscall */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0;		/* Arg 2: sigset_t *oldset */
@@ -876,7 +883,7 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	tophys(r1,r1);
 	/* MS: Restore all regs */
 	RESTORE_REGS
-	addik	r1, r1, STATE_SAVE_SIZE	 /* Clean up stack space */
+	addik	r1, r1, PT_SIZE	 /* Clean up stack space */
 	lwi	r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer */
 DBTRAP_return_user: /* MS: Make global symbol for debugging */
 	rtbd	r16, 0; /* MS: Instructions to return from a debug trap */
@@ -887,9 +894,9 @@ DBTRAP_return_user: /* MS: Make global symbol for debugging */
 	tophys(r1,r1);
 	/* MS: Restore all regs */
 	RESTORE_REGS
-	lwi	r14, r1, PTO+PT_R14;
-	lwi	r16, r1, PTO+PT_PC;
-	addik	r1, r1, STATE_SAVE_SIZE; /* MS: Clean up stack space */
+	lwi	r14, r1, PT_R14;
+	lwi	r16, r1, PT_PC;
+	addik	r1, r1, PT_SIZE; /* MS: Clean up stack space */
 	tovirt(r1,r1);
 DBTRAP_return_kernel: /* MS: Make global symbol for debugging */
 	rtbd	r16, 0; /* MS: Instructions to return from a debug trap */
@@ -981,20 +988,22 @@ ENTRY(_switch_to)
 	nop
 
 ENTRY(_reset)
-	brai	0x70; /* Jump back to FS-boot */
+	brai	0; /* Jump to reset vector */
 
 	/* These are compiled and loaded into high memory, then
 	 * copied into place in mach_early_setup */
 	.section	.init.ivt, "ax"
+#if CONFIG_MANUAL_RESET_VECTOR
 	.org	0x0
-	/* this is very important - here is the reset vector */
-	/* in current MMU branch you don't care what is here - it is
-	 * used from bootloader site - but this is correct for FS-BOOT */
-	brai	0x70
-	nop
+	brai	CONFIG_MANUAL_RESET_VECTOR
+#endif
+	.org	0x8
 	brai	TOPHYS(_user_exception); /* syscall handler */
+	.org	0x10
 	brai	TOPHYS(_interrupt);	/* Interrupt handler */
+	.org	0x18
 	brai	TOPHYS(_debug_exception);	/* debug trap handler */
+	.org	0x20
 	brai	TOPHYS(_hw_exception_handler);	/* HW exception handler */
 
 .section .rodata,"a"
diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c
index a7fa6ae7..66fad23 100644
--- a/arch/microblaze/kernel/exceptions.c
+++ b/arch/microblaze/kernel/exceptions.c
@@ -50,7 +50,7 @@ void die(const char *str, struct pt_regs *fp, long err)
 }
 
 /* for user application debugging */
-void sw_exception(struct pt_regs *regs)
+asmlinkage void sw_exception(struct pt_regs *regs)
 {
 	_exception(SIGTRAP, regs, TRAP_BRKPT, regs->r16);
 	flush_dcache_range(regs->r16, regs->r16 + 0x4);
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index 778a5ce..77320b8 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -39,7 +39,7 @@
 #include <asm/mmu.h>
 #include <asm/processor.h>
 
-.data
+.section .data
 .global empty_zero_page
 .align 12
 empty_zero_page:
@@ -50,6 +50,11 @@ swapper_pg_dir:
 
 #endif /* CONFIG_MMU */
 
+.section .rodata
+.align 4
+endian_check:
+	.word	1
+
 	__HEAD
 ENTRY(_start)
 #if CONFIG_KERNEL_BASE_ADDR == 0
@@ -79,10 +84,7 @@ real_start:
 /* Does r7 point to a valid FDT? Load HEADER magic number */
 	/* Run time Big/Little endian platform */
 	/* Save 1 as word and load byte - 0 - BIG, 1 - LITTLE */
-	addik	r11, r0, 0x1 /* BIG/LITTLE checking value */
-	/* __bss_start will be zeroed later - it is just temp location */
-	swi	r11, r0, TOPHYS(__bss_start)
-	lbui	r11, r0, TOPHYS(__bss_start)
+	lbui	r11, r0, TOPHYS(endian_check)
 	beqid	r11, big_endian /* DO NOT break delay stop dependency */
 	lw	r11, r0, r7 /* Big endian load in delay slot */
 	lwr	r11, r0, r7 /* Little endian load */
@@ -222,26 +224,26 @@ start_here:
 #endif /* CONFIG_MMU */
 
 	/* Initialize small data anchors */
-	la	r13, r0, _KERNEL_SDA_BASE_
-	la	r2, r0, _KERNEL_SDA2_BASE_
+	addik	r13, r0, _KERNEL_SDA_BASE_
+	addik	r2, r0, _KERNEL_SDA2_BASE_
 
 	/* Initialize stack pointer */
-	la	r1, r0, init_thread_union + THREAD_SIZE - 4
+	addik	r1, r0, init_thread_union + THREAD_SIZE - 4
 
 	/* Initialize r31 with current task address */
-	la	r31, r0, init_task
+	addik	r31, r0, init_task
 
 	/*
 	 * Call platform dependent initialize function.
 	 * Please see $(ARCH)/mach-$(SUBARCH)/setup.c for
 	 * the function.
 	 */
-	la	r9, r0, machine_early_init
+	addik	r9, r0, machine_early_init
 	brald	r15, r9
 	nop
 
 #ifndef CONFIG_MMU
-	la	r15, r0, machine_halt
+	addik	r15, r0, machine_halt
 	braid	start_kernel
 	nop
 #else
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 782680d..56572e9 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -77,6 +77,8 @@
 #include <asm/signal.h>
 #include <asm/asm-offsets.h>
 
+#undef DEBUG
+
 /* Helpful Macros */
 #define NUM_TO_REG(num)		r ## num
 
@@ -91,7 +93,7 @@
 		lwi	r6, r1, PT_R6;		\
 		lwi	r11, r1, PT_R11;	\
 		lwi	r31, r1, PT_R31;	\
-		lwi	r1, r0, TOPHYS(r0_ram + 0);
+		lwi	r1, r1, PT_R1;
 #endif /* CONFIG_MMU */
 
 #define LWREG_NOP			\
@@ -206,8 +208,8 @@
  *      |      .      |
  *      |      .      |
  *
- * NO_MMU kernel use the same r0_ram pointed space - look to vmlinux.lds.S
- * which is used for storing register values - old style was, that value were
+ * MMU kernel uses the same 'pt_pool_space' pointed space
+ * which is used for storing register values - noMMu style was, that values were
  * stored in stack but in case of failure you lost information about register.
  * Currently you can see register value in memory in specific place.
  * In compare to with previous solution the speed should be the same.
@@ -226,8 +228,22 @@
  */
 
 /* wrappers to restore state before coming to entry.S */
-
 #ifdef CONFIG_MMU
+.section .data
+.align 4
+pt_pool_space:
+	.space	PT_SIZE
+
+#ifdef DEBUG
+/* Create space for exception counting. */
+.section .data
+.global exception_debug_table
+.align 4
+exception_debug_table:
+	/* Look at exception vector table. There is 32 exceptions * word size */
+	.space	(32 * 4)
+#endif /* DEBUG */
+
 .section .rodata
 .align 4
 _MB_HW_ExceptionVectorTable:
@@ -287,10 +303,10 @@ _hw_exception_handler:
 #ifndef CONFIG_MMU
 	addik	r1, r1, -(EX_HANDLER_STACK_SIZ); /* Create stack frame */
 #else
-	swi	r1, r0, TOPHYS(r0_ram + 0); /* GET_SP */
+	swi	r1, r0, TOPHYS(pt_pool_space + PT_R1); /* GET_SP */
 	/* Save date to kernel memory. Here is the problem
 	 * when you came from user space */
-	ori	r1, r0, TOPHYS(r0_ram + 28);
+	ori	r1, r0, TOPHYS(pt_pool_space);
 #endif
 	swi	r3, r1, PT_R3
 	swi	r4, r1, PT_R4
@@ -329,12 +345,12 @@ not_in_delay_slot:
 
 #ifdef DEBUG
 /* counting which exception happen */
-	lwi	r5, r0, 0x200 + TOPHYS(r0_ram)
+	lwi	r5, r0, TOPHYS(exception_debug_table)
 	addi	r5, r5, 1
-	swi	r5, r0, 0x200 + TOPHYS(r0_ram)
-	lwi	r5, r6, 0x200 + TOPHYS(r0_ram)
+	swi	r5, r0, TOPHYS(exception_debug_table)
+	lwi	r5, r6, TOPHYS(exception_debug_table)
 	addi	r5, r5, 1
-	swi	r5, r6, 0x200 + TOPHYS(r0_ram)
+	swi	r5, r6, TOPHYS(exception_debug_table)
 #endif
 /* end */
 	/* Load the HW Exception vector */
@@ -474,7 +490,7 @@ ex_lw_tail:
 	/* Get the destination register number into r5 */
 	lbui	r5, r0, TOPHYS(ex_reg_op);
 	/* Form load_word jump table offset (lw_table + (8 * regnum)) */
-	la	r6, r0, TOPHYS(lw_table);
+	addik	r6, r0, TOPHYS(lw_table);
 	addk	r5, r5, r5;
 	addk	r5, r5, r5;
 	addk	r5, r5, r5;
@@ -485,7 +501,7 @@ ex_sw:
 	/* Get the destination register number into r5 */
 	lbui	r5, r0, TOPHYS(ex_reg_op);
 	/* Form store_word jump table offset (sw_table + (8 * regnum)) */
-	la	r6, r0, TOPHYS(sw_table);
+	addik	r6, r0, TOPHYS(sw_table);
 	add	r5, r5, r5;
 	add	r5, r5, r5;
 	add	r5, r5, r5;
@@ -896,7 +912,7 @@ ex_lw_vm:
 	beqid	r6, ex_lhw_vm;
 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;
+	addik	r6, r0, ex_tmp_data_loc_0;
 	sbi	r5, r6, 0;
 load2:	lbui	r5, r4, 1;
 	sbi	r5, r6, 1;
@@ -910,7 +926,7 @@ load4:	lbui	r5, r4, 3;
 ex_lhw_vm:
 	/* Load a half-word, byte-by-byte from destination address and
 	 * save it in tmp space */
-	la	r6, r0, ex_tmp_data_loc_0;
+	addik	r6, r0, ex_tmp_data_loc_0;
 	sbi	r5, r6, 0;
 load5:	lbui	r5, r4, 1;
 	sbi	r5, r6, 1;
@@ -926,7 +942,7 @@ ex_sw_vm:
 	addik	r5, r8, sw_table_vm;
 	bra	r5;
 ex_sw_tail_vm:
-	la	r5, r0, ex_tmp_data_loc_0;
+	addik	r5, r0, ex_tmp_data_loc_0;
 	beqid	r6, ex_shw_vm;
 	swi	r3, r5, 0;	/* Get the word - delay slot */
 	/* Store the word, byte-by-byte into destination address */
@@ -969,7 +985,7 @@ ex_unaligned_fixup:
 	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 */
+	addik	r15, r0, ret_from_exc-8 /* setup return address */
 	brid	bad_page_fault
 	nop
 
diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
index d61ea33..e466128 100644
--- a/arch/microblaze/kernel/intc.c
+++ b/arch/microblaze/kernel/intc.c
@@ -40,59 +40,46 @@ unsigned int nr_irq;
 #define MER_ME (1<<0)
 #define MER_HIE (1<<1)
 
-static void intc_enable_or_unmask(unsigned int irq)
+static void intc_enable_or_unmask(struct irq_data *d)
 {
-	unsigned long mask = 1 << irq;
-	pr_debug("enable_or_unmask: %d\n", irq);
+	unsigned long mask = 1 << d->irq;
+	pr_debug("enable_or_unmask: %d\n", d->irq);
 	out_be32(INTC_BASE + SIE, mask);
 
 	/* ack level irqs because they can't be acked during
 	 * ack function since the handle_level_irq function
 	 * acks the irq before calling the interrupt handler
 	 */
-	if (irq_desc[irq].status & IRQ_LEVEL)
+	if (irq_to_desc(d->irq)->status & IRQ_LEVEL)
 		out_be32(INTC_BASE + IAR, mask);
 }
 
-static void intc_disable_or_mask(unsigned int irq)
+static void intc_disable_or_mask(struct irq_data *d)
 {
-	pr_debug("disable: %d\n", irq);
-	out_be32(INTC_BASE + CIE, 1 << irq);
+	pr_debug("disable: %d\n", d->irq);
+	out_be32(INTC_BASE + CIE, 1 << d->irq);
 }
 
-static void intc_ack(unsigned int irq)
+static void intc_ack(struct irq_data *d)
 {
-	pr_debug("ack: %d\n", irq);
-	out_be32(INTC_BASE + IAR, 1 << irq);
+	pr_debug("ack: %d\n", d->irq);
+	out_be32(INTC_BASE + IAR, 1 << d->irq);
 }
 
-static void intc_mask_ack(unsigned int irq)
+static void intc_mask_ack(struct irq_data *d)
 {
-	unsigned long mask = 1 << irq;
-	pr_debug("disable_and_ack: %d\n", irq);
+	unsigned long mask = 1 << d->irq;
+	pr_debug("disable_and_ack: %d\n", d->irq);
 	out_be32(INTC_BASE + CIE, mask);
 	out_be32(INTC_BASE + IAR, mask);
 }
 
-static void intc_end(unsigned int irq)
-{
-	unsigned long mask = 1 << irq;
-	pr_debug("end: %d\n", irq);
-	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
-		out_be32(INTC_BASE + SIE, mask);
-		/* ack level sensitive intr */
-		if (irq_desc[irq].status & IRQ_LEVEL)
-			out_be32(INTC_BASE + IAR, mask);
-	}
-}
-
 static struct irq_chip intc_dev = {
 	.name = "Xilinx INTC",
-	.unmask = intc_enable_or_unmask,
-	.mask = intc_disable_or_mask,
-	.ack = intc_ack,
-	.mask_ack = intc_mask_ack,
-	.end = intc_end,
+	.irq_unmask = intc_enable_or_unmask,
+	.irq_mask = intc_disable_or_mask,
+	.irq_ack = intc_ack,
+	.irq_mask_ack = intc_mask_ack,
 };
 
 unsigned int get_irq(struct pt_regs *regs)
@@ -172,11 +159,11 @@ void __init init_IRQ(void)
 		if (intr_type & (0x00000001 << i)) {
 			set_irq_chip_and_handler_name(i, &intc_dev,
 				handle_edge_irq, intc_dev.name);
-			irq_desc[i].status &= ~IRQ_LEVEL;
+			irq_clear_status_flags(i, IRQ_LEVEL);
 		} else {
 			set_irq_chip_and_handler_name(i, &intc_dev,
 				handle_level_irq, intc_dev.name);
-			irq_desc[i].status |= IRQ_LEVEL;
+			irq_set_status_flags(i, IRQ_LEVEL);
 		}
 	}
 }
diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c
index a9345fb..0988224 100644
--- a/arch/microblaze/kernel/irq.c
+++ b/arch/microblaze/kernel/irq.c
@@ -50,6 +50,7 @@ next_irq:
 int show_interrupts(struct seq_file *p, void *v)
 {
 	int i = *(loff_t *) v, j;
+	struct irq_desc *desc;
 	struct irqaction *action;
 	unsigned long flags;
 
@@ -61,8 +62,9 @@ int show_interrupts(struct seq_file *p, void *v)
 	}
 
 	if (i < nr_irq) {
-		raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
-		action = irq_desc[i].action;
+		desc = irq_to_desc(i);
+		raw_spin_lock_irqsave(&desc->lock, flags);
+		action = desc->action;
 		if (!action)
 			goto skip;
 		seq_printf(p, "%3d: ", i);
@@ -72,9 +74,9 @@ int show_interrupts(struct seq_file *p, void *v)
 		for_each_online_cpu(j)
 			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
 #endif
-		seq_printf(p, " %8s", irq_desc[i].status &
+		seq_printf(p, " %8s", desc->status &
 					IRQ_LEVEL ? "level" : "edge");
-		seq_printf(p, " %8s", irq_desc[i].chip->name);
+		seq_printf(p, " %8s", desc->irq_data.chip->name);
 		seq_printf(p, "  %s", action->name);
 
 		for (action = action->next; action; action = action->next)
@@ -82,7 +84,7 @@ int show_interrupts(struct seq_file *p, void *v)
 
 		seq_putc(p, '\n');
 skip:
-		raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+		raw_spin_unlock_irqrestore(&desc->lock, flags);
 	}
 	return 0;
 }
diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c
index 5cb0341..49faeb4 100644
--- a/arch/microblaze/kernel/microblaze_ksyms.c
+++ b/arch/microblaze/kernel/microblaze_ksyms.c
@@ -24,6 +24,7 @@
 
 extern char *_ebss;
 EXPORT_SYMBOL_GPL(_ebss);
+
 #ifdef CONFIG_FUNCTION_TRACER
 extern void _mcount(void);
 EXPORT_SYMBOL(_mcount);
@@ -45,3 +46,14 @@ EXPORT_SYMBOL(empty_zero_page);
 #endif
 
 EXPORT_SYMBOL(mbc);
+
+extern void __divsi3(void);
+EXPORT_SYMBOL(__divsi3);
+extern void __modsi3(void);
+EXPORT_SYMBOL(__modsi3);
+extern void __mulsi3(void);
+EXPORT_SYMBOL(__mulsi3);
+extern void __udivsi3(void);
+EXPORT_SYMBOL(__udivsi3);
+extern void __umodsi3(void);
+EXPORT_SYMBOL(__umodsi3);
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index ba7c4b1..968648a 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -159,7 +159,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 	}
 
 	/* FIXME STATE_SAVE_PT_OFFSET; */
-	ti->cpu_context.r1  = (unsigned long)childregs - STATE_SAVE_ARG_SPACE;
+	ti->cpu_context.r1  = (unsigned long)childregs;
 	/* we should consider the fact that childregs is a copy of the parent
 	 * regs which were saved immediately after entering the kernel state
 	 * before enabling VM. This MSR will be restored in switch_to and
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index bceaa55..00ee90f 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -59,7 +59,7 @@ static int __init early_init_dt_scan_serial(unsigned long node,
 {
 	unsigned long l;
 	char *p;
-	int *addr;
+	const __be32 *addr;
 
 	pr_debug("search \"serial\", depth: %d, uname: %s\n", depth, uname);
 
diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c
index 05ac8cc..6a8e0cc 100644
--- a/arch/microblaze/kernel/ptrace.c
+++ b/arch/microblaze/kernel/ptrace.c
@@ -39,6 +39,7 @@
 #include <linux/uaccess.h>
 #include <asm/asm-offsets.h>
 #include <asm/cacheflush.h>
+#include <asm/syscall.h>
 #include <asm/io.h>
 
 /* Returns the address where the register at REG_OFFS in P is stashed away. */
@@ -123,7 +124,7 @@ long arch_ptrace(struct task_struct *child, long request,
 			rval = -EIO;
 
 		if (rval == 0 && request == PTRACE_PEEKUSR)
-			rval = put_user(val, (unsigned long *)data);
+			rval = put_user(val, (unsigned long __user *)data);
 		break;
 	default:
 		rval = ptrace_request(child, request, addr, data);
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index 9312fbb..8e2c09b 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -95,7 +95,8 @@ inline unsigned get_romfs_len(unsigned *addr)
 void __init machine_early_init(const char *cmdline, unsigned int ram,
 		unsigned int fdt, unsigned int msr)
 {
-	unsigned long *src, *dst = (unsigned long *)0x0;
+	unsigned long *src, *dst;
+	unsigned int offset = 0;
 
 	/* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the
 	 * end of kernel. There are two position which we want to check.
@@ -168,7 +169,14 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
 				"CPU have it %x\n", msr);
 #endif
 
-	for (src = __ivt_start; src < __ivt_end; src++, dst++)
+	/* Do not copy reset vectors. offset = 0x2 means skip the first
+	 * two instructions. dst is pointer to MB vectors which are placed
+	 * in block ram. If you want to copy reset vector setup offset to 0x0 */
+#if !CONFIG_MANUAL_RESET_VECTOR
+	offset = 0x2;
+#endif
+	dst = (unsigned long *) (offset * sizeof(u32));
+	for (src = __ivt_start + offset; src < __ivt_end; src++, dst++)
 		*dst = *src;
 
 	/* Initialize global data */
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index d8d3bb3..5996711 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -93,7 +93,7 @@ static int restore_sigcontext(struct pt_regs *regs,
 asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame =
-		(struct rt_sigframe __user *)(regs->r1 + STATE_SAVE_ARG_SPACE);
+		(struct rt_sigframe __user *)(regs->r1);
 
 	sigset_t set;
 	int rval;
@@ -197,8 +197,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	/* Create the ucontext. */
 	err |= __put_user(0, &frame->uc.uc_flags);
-	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
+	err |= __put_user(NULL, &frame->uc.uc_link);
+	err |= __put_user((void __user *)current->sas_ss_sp,
 			&frame->uc.uc_stack.ss_sp);
 	err |= __put_user(sas_ss_flags(regs->r1),
 			&frame->uc.uc_stack.ss_flags);
@@ -247,7 +247,7 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		goto give_sigsegv;
 
 	/* Set up registers for signal handler */
-	regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
+	regs->r1 = (unsigned long) frame;
 
 	/* Signal handler args: */
 	regs->r5 = signal; /* arg 0: signum */
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
index 2250fe9..e5b154f 100644
--- a/arch/microblaze/kernel/sys_microblaze.c
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -40,7 +40,8 @@ asmlinkage long microblaze_vfork(struct pt_regs *regs)
 						regs, 0, NULL, NULL);
 }
 
-asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs)
+asmlinkage long microblaze_clone(int flags, unsigned long stack,
+							struct pt_regs *regs)
 {
 	if (!stack)
 		stack = regs->r1;
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index a5aa33d..d8a214f 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -38,8 +38,8 @@ static unsigned int timer_baseaddr;
 #define TIMER_BASE	timer_baseaddr
 #endif
 
-unsigned int freq_div_hz;
-unsigned int timer_clock_freq;
+static unsigned int freq_div_hz;
+static unsigned int timer_clock_freq;
 
 #define TCSR0	(0x00)
 #define TLR0	(0x04)
@@ -202,7 +202,7 @@ static struct cyclecounter microblaze_cc = {
 	.shift = 8,
 };
 
-int __init init_microblaze_timecounter(void)
+static int __init init_microblaze_timecounter(void)
 {
 	microblaze_cc.mult = div_sc(timer_clock_freq, NSEC_PER_SEC,
 				microblaze_cc.shift);
diff --git a/arch/microblaze/kernel/unwind.c b/arch/microblaze/kernel/unwind.c
index fefac5c..9781a52 100644
--- a/arch/microblaze/kernel/unwind.c
+++ b/arch/microblaze/kernel/unwind.c
@@ -183,7 +183,7 @@ static inline void unwind_trap(struct task_struct *task, unsigned long pc,
  * @trace : Where to store stack backtrace (PC values).
  *	    NULL == print backtrace to kernel log
  */
-void microblaze_unwind_inner(struct task_struct *task,
+static void microblaze_unwind_inner(struct task_struct *task,
 			     unsigned long pc, unsigned long fp,
 			     unsigned long leaf_return,
 			     struct stack_trace *trace)
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index 3451bde..ac0e1a5 100644
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -70,11 +70,6 @@ SECTIONS {
 	RW_DATA_SECTION(32, PAGE_SIZE, THREAD_SIZE)
 	_edata = . ;
 
-	/* Reserve some low RAM for r0 based memory references */
-	. = ALIGN(0x4) ;
-	r0_ram = . ;
-	. = . +  PAGE_SIZE;	/* a page should be enough */
-
 	/* Under the microblaze ABI, .sdata and .sbss must be contiguous */
 	. = ALIGN(8);
 	.sdata : AT(ADDR(.sdata) - LOAD_OFFSET) {