Merge branch 'master' into for-next

Pull linus#master to merge PER_CPU_DEF_ATTRIBUTES and alpha build fix
changes.  As alpha in percpu tree uses 'weak' attribute instead of
inline assembly, there's no need for __used attribute.

Conflicts:
	arch/alpha/include/asm/percpu.h
	arch/mn10300/kernel/vmlinux.lds.S
	include/linux/percpu-defs.h

10 files changed, 406 insertions, 462 deletions

diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
index 3731088e181b..141d9281e4b0 100644
--- a/arch/blackfin/kernel/Makefile
+++ b/arch/blackfin/kernel/Makefile
@@ -20,7 +20,6 @@ obj-$(CONFIG_FUNCTION_GRAPH_TRACER)  += ftrace.o
 CFLAGS_REMOVE_ftrace.o = -pg
 
 obj-$(CONFIG_IPIPE)                  += ipipe.o
-obj-$(CONFIG_IPIPE_TRACE_MCOUNT)     += mcount.o
 obj-$(CONFIG_BFIN_GPTIMERS)          += gptimers.o
 obj-$(CONFIG_CPLB_INFO)              += cplbinfo.o
 obj-$(CONFIG_MODULES)                += module.o
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
index c006a44527bf..36193eed9a1f 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
@@ -46,13 +46,13 @@ void __init generate_cplb_tables_cpu(unsigned int cpu)
 
 	printk(KERN_INFO "MPU: setting up cplb tables with memory protection\n");
 
-#ifdef CONFIG_BFIN_ICACHE
+#ifdef CONFIG_BFIN_EXTMEM_ICACHEABLE
 	i_cache = CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND;
 #endif
 
-#ifdef CONFIG_BFIN_DCACHE
+#ifdef CONFIG_BFIN_EXTMEM_DCACHEABLE
 	d_cache = CPLB_L1_CHBL;
-#ifdef CONFIG_BFIN_WT
+#ifdef CONFIG_BFIN_EXTMEM_WRITETROUGH
 	d_cache |= CPLB_L1_AOW | CPLB_WT;
 #endif
 #endif
@@ -91,9 +91,9 @@ void __init generate_cplb_tables_cpu(unsigned int cpu)
 	/* Cover L2 memory */
 #if L2_LENGTH > 0
 	dcplb_tbl[cpu][i_d].addr = L2_START;
-	dcplb_tbl[cpu][i_d++].data = L2_DMEMORY | PAGE_SIZE_1MB;
+	dcplb_tbl[cpu][i_d++].data = L2_DMEMORY;
 	icplb_tbl[cpu][i_i].addr = L2_START;
-	icplb_tbl[cpu][i_i++].data = L2_IMEMORY | PAGE_SIZE_1MB;
+	icplb_tbl[cpu][i_i++].data = L2_IMEMORY;
 #endif
 
 	first_mask_dcplb = i_d;
diff --git a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
index 784923e52a9a..bcdfe9b0b71f 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c
@@ -150,15 +150,19 @@ static noinline int dcplb_miss(unsigned int cpu)
 	nr_dcplb_miss[cpu]++;
 
 	d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB;
-#ifdef CONFIG_BFIN_DCACHE
+#ifdef CONFIG_BFIN_EXTMEM_DCACHEABLE
 	if (bfin_addr_dcacheable(addr)) {
 		d_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND;
-#ifdef CONFIG_BFIN_WT
+# ifdef CONFIG_BFIN_EXTMEM_WRITETHROUGH
 		d_data |= CPLB_L1_AOW | CPLB_WT;
-#endif
+# endif
 	}
 #endif
-	if (addr >= physical_mem_end) {
+
+	if (L2_LENGTH && addr >= L2_START && addr < L2_START + L2_LENGTH) {
+		addr = L2_START;
+		d_data = L2_DMEMORY;
+	} else if (addr >= physical_mem_end) {
 		if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE
 		    && (status & FAULT_USERSUPV)) {
 			addr &= ~0x3fffff;
@@ -235,7 +239,7 @@ static noinline int icplb_miss(unsigned int cpu)
 
 	i_data = CPLB_VALID | CPLB_PORTPRIO | PAGE_SIZE_4KB;
 
-#ifdef CONFIG_BFIN_ICACHE
+#ifdef CONFIG_BFIN_EXTMEM_ICACHEABLE
 	/*
 	 * Normal RAM, and possibly the reserved memory area, are
 	 * cacheable.
@@ -245,7 +249,10 @@ static noinline int icplb_miss(unsigned int cpu)
 		i_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND;
 #endif
 
-	if (addr >= physical_mem_end) {
+	if (L2_LENGTH && addr >= L2_START && addr < L2_START + L2_LENGTH) {
+		addr = L2_START;
+		i_data = L2_IMEMORY;
+	} else if (addr >= physical_mem_end) {
 		if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH
 		    && (status & FAULT_USERSUPV)) {
 			addr &= ~(1 * 1024 * 1024 - 1);
@@ -365,13 +372,18 @@ void set_mask_dcplbs(unsigned long *masks, unsigned int cpu)
 	local_irq_save_hw(flags);
 	current_rwx_mask[cpu] = masks;
 
-	d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB;
-#ifdef CONFIG_BFIN_DCACHE
-	d_data |= CPLB_L1_CHBL;
-#ifdef CONFIG_BFIN_WT
-	d_data |= CPLB_L1_AOW | CPLB_WT;
-#endif
+	if (L2_LENGTH && addr >= L2_START && addr < L2_START + L2_LENGTH) {
+		addr = L2_START;
+		d_data = L2_DMEMORY;
+	} else {
+		d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB;
+#ifdef CONFIG_BFIN_EXTMEM_DCACHEABLE
+		d_data |= CPLB_L1_CHBL;
+# ifdef CONFIG_BFIN_EXTMEM_WRITETHROUGH
+		d_data |= CPLB_L1_AOW | CPLB_WT;
+# endif
 #endif
+	}
 
 	disable_dcplb();
 	for (i = first_mask_dcplb; i < first_switched_dcplb; i++) {
diff --git a/arch/blackfin/kernel/ipipe.c b/arch/blackfin/kernel/ipipe.c
index d8cde1fc5cb9..b8d22034b9a6 100644
--- a/arch/blackfin/kernel/ipipe.c
+++ b/arch/blackfin/kernel/ipipe.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__ipipe_freq_scale);
 
 atomic_t __ipipe_irq_lvdepth[IVG15 + 1];
 
-unsigned long __ipipe_irq_lvmask = __all_masked_irq_flags;
+unsigned long __ipipe_irq_lvmask = bfin_no_irqs;
 EXPORT_SYMBOL(__ipipe_irq_lvmask);
 
 static void __ipipe_ack_irq(unsigned irq, struct irq_desc *desc)
@@ -342,8 +342,3 @@ void ___ipipe_sync_pipeline(unsigned long syncmask)
 }
 
 EXPORT_SYMBOL(show_stack);
-
-#ifdef CONFIG_IPIPE_TRACE_MCOUNT
-void notrace _mcount(void);
-EXPORT_SYMBOL(_mcount);
-#endif /* CONFIG_IPIPE_TRACE_MCOUNT */
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 6e31e935bb31..4b5fd36187d9 100644
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -38,38 +38,15 @@
 #include <asm/pda.h>
 
 static atomic_t irq_err_count;
-static spinlock_t irq_controller_lock;
-
-/*
- * Dummy mask/unmask handler
- */
-void dummy_mask_unmask_irq(unsigned int irq)
-{
-}
-
 void ack_bad_irq(unsigned int irq)
 {
 	atomic_inc(&irq_err_count);
 	printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
 }
 
-static struct irq_chip bad_chip = {
-	.ack = dummy_mask_unmask_irq,
-	.mask = dummy_mask_unmask_irq,
-	.unmask = dummy_mask_unmask_irq,
-};
-
-static int bad_stats;
 static struct irq_desc bad_irq_desc = {
-	.status = IRQ_DISABLED,
-	.chip = &bad_chip,
 	.handle_irq = handle_bad_irq,
-	.depth = 1,
 	.lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock),
-	.kstat_irqs = &bad_stats,
-#ifdef CONFIG_SMP
-	.affinity = CPU_MASK_ALL
-#endif
 };
 
 #ifdef CONFIG_CPUMASK_OFFSTACK
@@ -77,6 +54,7 @@ static struct irq_desc bad_irq_desc = {
 #error "Blackfin architecture does not support CONFIG_CPUMASK_OFFSTACK."
 #endif
 
+#ifdef CONFIG_PROC_FS
 int show_interrupts(struct seq_file *p, void *v)
 {
 	int i = *(loff_t *) v, j;
@@ -108,50 +86,29 @@ int show_interrupts(struct seq_file *p, void *v)
 	}
 	return 0;
 }
-
-/*
- * do_IRQ handles all hardware IRQs.  Decoded IRQs should not
- * come via this function.  Instead, they should provide their
- * own 'handler'
- */
-#ifdef CONFIG_DO_IRQ_L1
-__attribute__((l1_text))
-#endif
-asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
-{
-	struct pt_regs *old_regs;
-	struct irq_desc *desc = irq_desc + irq;
-#ifndef CONFIG_IPIPE
-	unsigned short pending, other_ints;
 #endif
-	old_regs = set_irq_regs(regs);
 
-	/*
-	 * Some hardware gives randomly wrong interrupts.  Rather
-	 * than crashing, do something sensible.
-	 */
-	if (irq >= NR_IRQS)
-		desc = &bad_irq_desc;
-
-	irq_enter();
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
+static void check_stack_overflow(int irq)
+{
 	/* Debugging check for stack overflow: is there less than STACK_WARN free? */
-	{
-		long sp;
-
-		sp = __get_SP() & (THREAD_SIZE-1);
+	long sp = __get_SP() & (THREAD_SIZE - 1);
 
-		if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
-			dump_stack();
-			printk(KERN_EMERG "%s: possible stack overflow while handling irq %i "
-					" only %ld bytes free\n",
-				__func__, irq, sp - sizeof(struct thread_info));
-		}
+	if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
+		dump_stack();
+		pr_emerg("irq%i: possible stack overflow only %ld bytes free\n",
+			irq, sp - sizeof(struct thread_info));
 	}
+}
+#else
+static inline void check_stack_overflow(int irq) { }
 #endif
-	generic_handle_irq(irq);
 
 #ifndef CONFIG_IPIPE
+static void maybe_lower_to_irq14(void)
+{
+	unsigned short pending, other_ints;
+
 	/*
 	 * If we're the only interrupt running (ignoring IRQ15 which
 	 * is for syscalls), lower our priority to IRQ14 so that
@@ -165,7 +122,38 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 	other_ints = pending & (pending - 1);
 	if (other_ints == 0)
 		lower_to_irq14();
-#endif /* !CONFIG_IPIPE */
+}
+#else
+static inline void maybe_lower_to_irq14(void) { }
+#endif
+
+/*
+ * do_IRQ handles all hardware IRQs.  Decoded IRQs should not
+ * come via this function.  Instead, they should provide their
+ * own 'handler'
+ */
+#ifdef CONFIG_DO_IRQ_L1
+__attribute__((l1_text))
+#endif
+asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
+{
+	struct pt_regs *old_regs = set_irq_regs(regs);
+
+	irq_enter();
+
+	check_stack_overflow(irq);
+
+	/*
+	 * Some hardware gives randomly wrong interrupts.  Rather
+	 * than crashing, do something sensible.
+	 */
+	if (irq >= NR_IRQS)
+		handle_bad_irq(irq, &bad_irq_desc);
+	else
+		generic_handle_irq(irq);
+
+	maybe_lower_to_irq14();
+
 	irq_exit();
 
 	set_irq_regs(old_regs);
@@ -173,14 +161,6 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 
 void __init init_IRQ(void)
 {
-	struct irq_desc *desc;
-	int irq;
-
-	spin_lock_init(&irq_controller_lock);
-	for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++) {
-		*desc = bad_irq_desc;
-	}
-
 	init_arch_irq();
 
 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index da28f796ad78..cce79d05b90b 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -34,15 +34,6 @@ int gdb_bfin_vector = -1;
 #error change the definition of slavecpulocks
 #endif
 
-#define IN_MEM(addr, size, l1_addr, l1_size) \
-({ \
-	unsigned long __addr = (unsigned long)(addr); \
-	(l1_size && __addr >= l1_addr && __addr + (size) <= l1_addr + l1_size); \
-})
-#define ASYNC_BANK_SIZE \
-	(ASYNC_BANK0_SIZE + ASYNC_BANK1_SIZE + \
-	 ASYNC_BANK2_SIZE + ASYNC_BANK3_SIZE)
-
 void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
 {
 	gdb_regs[BFIN_R0] = regs->r0;
@@ -463,41 +454,88 @@ static int hex(char ch)
 
 static int validate_memory_access_address(unsigned long addr, int size)
 {
-	int cpu = raw_smp_processor_id();
-
-	if (size < 0)
+	if (size < 0 || addr == 0)
 		return -EFAULT;
-	if (addr >= 0x1000 && (addr + size) <= physical_mem_end)
-		return 0;
-	if (addr >= SYSMMR_BASE)
-		return 0;
-	if (IN_MEM(addr, size, ASYNC_BANK0_BASE, ASYNC_BANK_SIZE))
-		return 0;
-	if (cpu == 0) {
-		if (IN_MEM(addr, size, L1_SCRATCH_START, L1_SCRATCH_LENGTH))
-			return 0;
-		if (IN_MEM(addr, size, L1_CODE_START, L1_CODE_LENGTH))
-			return 0;
-		if (IN_MEM(addr, size, L1_DATA_A_START, L1_DATA_A_LENGTH))
-			return 0;
-		if (IN_MEM(addr, size, L1_DATA_B_START, L1_DATA_B_LENGTH))
-			return 0;
-#ifdef CONFIG_SMP
-	} else if (cpu == 1) {
-		if (IN_MEM(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
+	return bfin_mem_access_type(addr, size);
+}
+
+static int bfin_probe_kernel_read(char *dst, char *src, int size)
+{
+	unsigned long lsrc = (unsigned long)src;
+	int mem_type;
+
+	mem_type = validate_memory_access_address(lsrc, size);
+	if (mem_type < 0)
+		return mem_type;
+
+	if (lsrc >= SYSMMR_BASE) {
+		if (size == 2 && lsrc % 2 == 0) {
+			u16 mmr = bfin_read16(src);
+			memcpy(dst, &mmr, sizeof(mmr));
 			return 0;
-		if (IN_MEM(addr, size, COREB_L1_CODE_START, L1_CODE_LENGTH))
+		} else if (size == 4 && lsrc % 4 == 0) {
+			u32 mmr = bfin_read32(src);
+			memcpy(dst, &mmr, sizeof(mmr));
 			return 0;
-		if (IN_MEM(addr, size, COREB_L1_DATA_A_START, L1_DATA_A_LENGTH))
+		}
+	} else {
+		switch (mem_type) {
+			case BFIN_MEM_ACCESS_CORE:
+			case BFIN_MEM_ACCESS_CORE_ONLY:
+				return probe_kernel_read(dst, src, size);
+			/* XXX: should support IDMA here with SMP */
+			case BFIN_MEM_ACCESS_DMA:
+				if (dma_memcpy(dst, src, size))
+					return 0;
+				break;
+			case BFIN_MEM_ACCESS_ITEST:
+				if (isram_memcpy(dst, src, size))
+					return 0;
+				break;
+		}
+	}
+
+	return -EFAULT;
+}
+
+static int bfin_probe_kernel_write(char *dst, char *src, int size)
+{
+	unsigned long ldst = (unsigned long)dst;
+	int mem_type;
+
+	mem_type = validate_memory_access_address(ldst, size);
+	if (mem_type < 0)
+		return mem_type;
+
+	if (ldst >= SYSMMR_BASE) {
+		if (size == 2 && ldst % 2 == 0) {
+			u16 mmr;
+			memcpy(&mmr, src, sizeof(mmr));
+			bfin_write16(dst, mmr);
 			return 0;
-		if (IN_MEM(addr, size, COREB_L1_DATA_B_START, L1_DATA_B_LENGTH))
+		} else if (size == 4 && ldst % 4 == 0) {
+			u32 mmr;
+			memcpy(&mmr, src, sizeof(mmr));
+			bfin_write32(dst, mmr);
 			return 0;
-#endif
+		}
+	} else {
+		switch (mem_type) {
+			case BFIN_MEM_ACCESS_CORE:
+			case BFIN_MEM_ACCESS_CORE_ONLY:
+				return probe_kernel_write(dst, src, size);
+			/* XXX: should support IDMA here with SMP */
+			case BFIN_MEM_ACCESS_DMA:
+				if (dma_memcpy(dst, src, size))
+					return 0;
+				break;
+			case BFIN_MEM_ACCESS_ITEST:
+				if (isram_memcpy(dst, src, size))
+					return 0;
+				break;
+		}
 	}
 
-	if (IN_MEM(addr, size, L2_START, L2_LENGTH))
-		return 0;
-
 	return -EFAULT;
 }
 
@@ -509,14 +547,6 @@ int kgdb_mem2hex(char *mem, char *buf, int count)
 {
 	char *tmp;
 	int err;
-	unsigned char *pch;
-	unsigned short mmr16;
-	unsigned long mmr32;
-	int cpu = raw_smp_processor_id();
-
-	err = validate_memory_access_address((unsigned long)mem, count);
-	if (err)
-		return err;
 
 	/*
 	 * We use the upper half of buf as an intermediate buffer for the
@@ -524,44 +554,7 @@ int kgdb_mem2hex(char *mem, char *buf, int count)
 	 */
 	tmp = buf + count;
 
-	if ((unsigned int)mem >= SYSMMR_BASE) { /*access MMR registers*/
-		switch (count) {
-		case 2:
-			if ((unsigned int)mem % 2 == 0) {
-				mmr16 = *(unsigned short *)mem;
-				pch = (unsigned char *)&mmr16;
-				*tmp++ = *pch++;
-				*tmp++ = *pch++;
-				tmp -= 2;
-			} else
-				err = -EFAULT;
-			break;
-		case 4:
-			if ((unsigned int)mem % 4 == 0) {
-				mmr32 = *(unsigned long *)mem;
-				pch = (unsigned char *)&mmr32;
-				*tmp++ = *pch++;
-				*tmp++ = *pch++;
-				*tmp++ = *pch++;
-				*tmp++ = *pch++;
-				tmp -= 4;
-			} else
-				err = -EFAULT;
-			break;
-		default:
-			err = -EFAULT;
-		}
-	} else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH))
-#ifdef CONFIG_SMP
-		|| (cpu == 1 && IN_MEM(mem, count, COREB_L1_CODE_START, L1_CODE_LENGTH))
-#endif
-		) {
-		/* access L1 instruction SRAM*/
-		if (dma_memcpy(tmp, mem, count) == NULL)
-			err = -EFAULT;
-	} else
-		err = probe_kernel_read(tmp, mem, count);
-
+	err = bfin_probe_kernel_read(tmp, mem, count);
 	if (!err) {
 		while (count > 0) {
 			buf = pack_hex_byte(buf, *tmp);
@@ -582,13 +575,8 @@ int kgdb_mem2hex(char *mem, char *buf, int count)
  */
 int kgdb_ebin2mem(char *buf, char *mem, int count)
 {
-	char *tmp_old;
-	char *tmp_new;
-	unsigned short *mmr16;
-	unsigned long *mmr32;
-	int err;
+	char *tmp_old, *tmp_new;
 	int size;
-	int cpu = raw_smp_processor_id();
 
 	tmp_old = tmp_new = buf;
 
@@ -601,41 +589,7 @@ int kgdb_ebin2mem(char *buf, char *mem, int count)
 		tmp_old++;
 	}
 
-	err = validate_memory_access_address((unsigned long)mem, size);
-	if (err)
-		return err;
-
-	if ((unsigned int)mem >= SYSMMR_BASE) { /*access MMR registers*/
-		switch (size) {
-		case 2:
-			if ((unsigned int)mem % 2 == 0) {
-				mmr16 = (unsigned short *)buf;
-				*(unsigned short *)mem = *mmr16;
-			} else
-				err = -EFAULT;
-			break;
-		case 4:
-			if ((unsigned int)mem % 4 == 0) {
-				mmr32 = (unsigned long *)buf;
-				*(unsigned long *)mem = *mmr32;
-			} else
-				err = -EFAULT;
-			break;
-		default:
-			err = -EFAULT;
-		}
-	} else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH))
-#ifdef CONFIG_SMP
-		|| (cpu == 1 && IN_MEM(mem, count, COREB_L1_CODE_START, L1_CODE_LENGTH))
-#endif
-		) {
-		/* access L1 instruction SRAM */
-		if (dma_memcpy(mem, buf, size) == NULL)
-			err = -EFAULT;
-	} else
-		err = probe_kernel_write(mem, buf, size);
-
-	return err;
+	return bfin_probe_kernel_write(mem, buf, count);
 }
 
 /*
@@ -645,16 +599,7 @@ int kgdb_ebin2mem(char *buf, char *mem, int count)
  */
 int kgdb_hex2mem(char *buf, char *mem, int count)
 {
-	char *tmp_raw;
-	char *tmp_hex;
-	unsigned short *mmr16;
-	unsigned long *mmr32;
-	int err;
-	int cpu = raw_smp_processor_id();
-
-	err = validate_memory_access_address((unsigned long)mem, count);
-	if (err)
-		return err;
+	char *tmp_raw, *tmp_hex;
 
 	/*
 	 * We use the upper half of buf as an intermediate buffer for the
@@ -669,39 +614,18 @@ int kgdb_hex2mem(char *buf, char *mem, int count)
 		*tmp_raw |= hex(*tmp_hex--) << 4;
 	}
 
-	if ((unsigned int)mem >= SYSMMR_BASE) { /*access MMR registers*/
-		switch (count) {
-		case 2:
-			if ((unsigned int)mem % 2 == 0) {
-				mmr16 = (unsigned short *)tmp_raw;
-				*(unsigned short *)mem = *mmr16;
-			} else
-				err = -EFAULT;
-			break;
-		case 4:
-			if ((unsigned int)mem % 4 == 0) {
-				mmr32 = (unsigned long *)tmp_raw;
-				*(unsigned long *)mem = *mmr32;
-			} else
-				err = -EFAULT;
-			break;
-		default:
-			err = -EFAULT;
-		}
-	} else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH))
-#ifdef CONFIG_SMP
-		|| (cpu == 1 && IN_MEM(mem, count, COREB_L1_CODE_START, L1_CODE_LENGTH))
-#endif
-		) {
-		/* access L1 instruction SRAM */
-		if (dma_memcpy(mem, tmp_raw, count) == NULL)
-			err = -EFAULT;
-	} else
-		err = probe_kernel_write(mem, tmp_raw, count);
-
-	return err;
+	return bfin_probe_kernel_write(mem, tmp_raw, count);
 }
 
+#define IN_MEM(addr, size, l1_addr, l1_size) \
+({ \
+	unsigned long __addr = (unsigned long)(addr); \
+	(l1_size && __addr >= l1_addr && __addr + (size) <= l1_addr + l1_size); \
+})
+#define ASYNC_BANK_SIZE \
+	(ASYNC_BANK0_SIZE + ASYNC_BANK1_SIZE + \
+	 ASYNC_BANK2_SIZE + ASYNC_BANK3_SIZE)
+
 int kgdb_validate_break_address(unsigned long addr)
 {
 	int cpu = raw_smp_processor_id();
@@ -724,46 +648,17 @@ int kgdb_validate_break_address(unsigned long addr)
 
 int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)
 {
-	int err;
-	int cpu = raw_smp_processor_id();
-
-	if ((cpu == 0 && IN_MEM(addr, BREAK_INSTR_SIZE, L1_CODE_START, L1_CODE_LENGTH))
-#ifdef CONFIG_SMP
-		|| (cpu == 1 && IN_MEM(addr, BREAK_INSTR_SIZE, COREB_L1_CODE_START, L1_CODE_LENGTH))
-#endif
-		) {
-		/* access L1 instruction SRAM */
-		if (dma_memcpy(saved_instr, (void *)addr, BREAK_INSTR_SIZE)
-			== NULL)
-			return -EFAULT;
-
-		if (dma_memcpy((void *)addr, arch_kgdb_ops.gdb_bpt_instr,
-			BREAK_INSTR_SIZE) == NULL)
-			return -EFAULT;
-
-		return 0;
-	} else {
-		err = probe_kernel_read(saved_instr, (char *)addr,
-			BREAK_INSTR_SIZE);
-		if (err)
-			return err;
-
-		return probe_kernel_write((char *)addr,
-			arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
-	}
+	int err = bfin_probe_kernel_read(saved_instr, (char *)addr,
+	                                 BREAK_INSTR_SIZE);
+	if (err)
+		return err;
+	return bfin_probe_kernel_write((char *)addr, arch_kgdb_ops.gdb_bpt_instr,
+	                               BREAK_INSTR_SIZE);
 }
 
 int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle)
 {
-	if (IN_MEM(addr, BREAK_INSTR_SIZE, L1_CODE_START, L1_CODE_LENGTH)) {
-		/* access L1 instruction SRAM */
-		if (dma_memcpy((void *)addr, bundle, BREAK_INSTR_SIZE) == NULL)
-			return -EFAULT;
-
-		return 0;
-	} else
-		return probe_kernel_write((char *)addr,
-				(char *)bundle, BREAK_INSTR_SIZE);
+	return bfin_probe_kernel_write((char *)addr, bundle, BREAK_INSTR_SIZE);
 }
 
 int kgdb_arch_init(void)
diff --git a/arch/blackfin/kernel/mcount.S b/arch/blackfin/kernel/mcount.S
deleted file mode 100644
index edcfb3865f46..000000000000
--- a/arch/blackfin/kernel/mcount.S
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * linux/arch/blackfin/mcount.S
- *
- * Copyright (C) 2006 Analog Devices Inc.
- *
- * 2007/04/12 Save index, length, modify and base registers. --rpm
- */
-
-#include <linux/linkage.h>
-#include <asm/blackfin.h>
-
-.text
-
-.align 4 	/* just in case */
-
-ENTRY(__mcount)
-	[--sp] = i0;
-	[--sp] = i1;
-	[--sp] = i2;
-	[--sp] = i3;
-	[--sp] = l0;
-	[--sp] = l1;
-	[--sp] = l2;
-	[--sp] = l3;
-	[--sp] = m0;
-	[--sp] = m1;
-	[--sp] = m2;
-	[--sp] = m3;
-	[--sp] = b0;
-	[--sp] = b1;
-	[--sp] = b2;
-	[--sp] = b3;
-	[--sp] = ( r7:0, p5:0 );
-	[--sp] = ASTAT;
-
-	p1.L = _ipipe_trace_enable;
-	p1.H = _ipipe_trace_enable;
-	r7 = [p1];
-	CC = r7 == 0;
-	if CC jump out;
-	link 0x10;
-	r0 = 0x0;
-	[sp + 0xc] = r0; /* v */
-	r0 = 0x0;	/* type: IPIPE_TRACE_FN */
-	r1 = rets;
-	p0 = [fp];	/* p0: Prior FP */
-	r2 = [p0 + 4];	/* r2: Prior RETS */
-	call ___ipipe_trace;
-	unlink;
-out:
-	ASTAT = [sp++];
-	( r7:0, p5:0 ) = [sp++];
-	b3 = [sp++];
-	b2 = [sp++];
-	b1 = [sp++];
-	b0 = [sp++];
-	m3 = [sp++];
-	m2 = [sp++];
-	m1 = [sp++];
-	m0 = [sp++];
-	l3 = [sp++];
-	l2 = [sp++];
-	l1 = [sp++];
-	l0 = [sp++];
-	i3 = [sp++];
-	i2 = [sp++];
-	i1 = [sp++];
-	i0 = [sp++];
-	rts;
-ENDPROC(__mcount)
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 3e1d86e456f6..79cad0ac5892 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -344,6 +344,87 @@ void finish_atomic_sections (struct pt_regs *regs)
 	}
 }
 
+static inline
+int in_mem(unsigned long addr, unsigned long size,
+           unsigned long start, unsigned long end)
+{
+	return addr >= start && addr + size <= end;
+}
+static inline
+int in_mem_const_off(unsigned long addr, unsigned long size, unsigned long off,
+                     unsigned long const_addr, unsigned long const_size)
+{
+	return const_size &&
+	       in_mem(addr, size, const_addr + off, const_addr + const_size);
+}
+static inline
+int in_mem_const(unsigned long addr, unsigned long size,
+                 unsigned long const_addr, unsigned long const_size)
+{
+	return in_mem_const_off(addr, 0, size, const_addr, const_size);
+}
+#define IN_ASYNC(bnum, bctlnum) \
+({ \
+	(bfin_read_EBIU_AMGCTL() & 0xe) < ((bnum + 1) << 1) ? -EFAULT : \
+	bfin_read_EBIU_AMBCTL##bctlnum() & B##bnum##RDYEN ? -EFAULT : \
+	BFIN_MEM_ACCESS_CORE; \
+})
+
+int bfin_mem_access_type(unsigned long addr, unsigned long size)
+{
+	int cpu = raw_smp_processor_id();
+
+	/* Check that things do not wrap around */
+	if (addr > ULONG_MAX - size)
+		return -EFAULT;
+
+	if (in_mem(addr, size, FIXED_CODE_START, physical_mem_end))
+		return BFIN_MEM_ACCESS_CORE;
+
+	if (in_mem_const(addr, size, L1_CODE_START, L1_CODE_LENGTH))
+		return cpu == 0 ? BFIN_MEM_ACCESS_ITEST : BFIN_MEM_ACCESS_IDMA;
+	if (in_mem_const(addr, size, L1_SCRATCH_START, L1_SCRATCH_LENGTH))
+		return cpu == 0 ? BFIN_MEM_ACCESS_CORE_ONLY : -EFAULT;
+	if (in_mem_const(addr, size, L1_DATA_A_START, L1_DATA_A_LENGTH))
+		return cpu == 0 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
+	if (in_mem_const(addr, size, L1_DATA_B_START, L1_DATA_B_LENGTH))
+		return cpu == 0 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
+#ifdef COREB_L1_CODE_START
+	if (in_mem_const(addr, size, COREB_L1_CODE_START, L1_CODE_LENGTH))
+		return cpu == 1 ? BFIN_MEM_ACCESS_ITEST : BFIN_MEM_ACCESS_IDMA;
+	if (in_mem_const(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
+		return cpu == 1 ? BFIN_MEM_ACCESS_CORE_ONLY : -EFAULT;
+	if (in_mem_const(addr, size, COREB_L1_DATA_A_START, L1_DATA_A_LENGTH))
+		return cpu == 1 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
+	if (in_mem_const(addr, size, COREB_L1_DATA_B_START, L1_DATA_B_LENGTH))
+		return cpu == 1 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
+#endif
+	if (in_mem_const(addr, size, L2_START, L2_LENGTH))
+		return BFIN_MEM_ACCESS_CORE;
+
+	if (addr >= SYSMMR_BASE)
+		return BFIN_MEM_ACCESS_CORE_ONLY;
+
+	/* We can't read EBIU banks that aren't enabled or we end up hanging
+	 * on the access to the async space.
+	 */
+	if (in_mem_const(addr, size, ASYNC_BANK0_BASE, ASYNC_BANK0_SIZE))
+		return IN_ASYNC(0, 0);
+	if (in_mem_const(addr, size, ASYNC_BANK1_BASE, ASYNC_BANK1_SIZE))
+		return IN_ASYNC(1, 0);
+	if (in_mem_const(addr, size, ASYNC_BANK2_BASE, ASYNC_BANK2_SIZE))
+		return IN_ASYNC(2, 1);
+	if (in_mem_const(addr, size, ASYNC_BANK3_BASE, ASYNC_BANK3_SIZE))
+		return IN_ASYNC(3, 1);
+
+	if (in_mem_const(addr, size, BOOT_ROM_START, BOOT_ROM_LENGTH))
+		return BFIN_MEM_ACCESS_CORE;
+	if (in_mem_const(addr, size, L1_ROM_START, L1_ROM_LENGTH))
+		return BFIN_MEM_ACCESS_DMA;
+
+	return -EFAULT;
+}
+
 #if defined(CONFIG_ACCESS_CHECK)
 #ifdef CONFIG_ACCESS_OK_L1
 __attribute__((l1_text))
@@ -353,51 +434,61 @@ int _access_ok(unsigned long addr, unsigned long size)
 {
 	if (size == 0)
 		return 1;
-	if (addr > (addr + size))
+	/* Check that things do not wrap around */
+	if (addr > ULONG_MAX - size)
 		return 0;
 	if (segment_eq(get_fs(), KERNEL_DS))
 		return 1;
 #ifdef CONFIG_MTD_UCLINUX
-	if (addr >= memory_start && (addr + size) <= memory_end)
-		return 1;
-	if (addr >= memory_mtd_end && (addr + size) <= physical_mem_end)
+	if (1)
+#else
+	if (0)
+#endif
+	{
+		if (in_mem(addr, size, memory_start, memory_end))
+			return 1;
+		if (in_mem(addr, size, memory_mtd_end, physical_mem_end))
+			return 1;
+# ifndef CONFIG_ROMFS_ON_MTD
+		if (0)
+# endif
+			/* For XIP, allow user space to use pointers within the ROMFS.  */
+			if (in_mem(addr, size, memory_mtd_start, memory_mtd_end))
+				return 1;
+	} else {
+		if (in_mem(addr, size, memory_start, physical_mem_end))
+			return 1;
+	}
+
+	if (in_mem(addr, size, (unsigned long)__init_begin, (unsigned long)__init_end))
 		return 1;
 
-#ifdef CONFIG_ROMFS_ON_MTD
-	/* For XIP, allow user space to use pointers within the ROMFS.  */
-	if (addr >= memory_mtd_start && (addr + size) <= memory_mtd_end)
+	if (in_mem_const(addr, size, L1_CODE_START, L1_CODE_LENGTH))
 		return 1;
-#endif
-#else
-	if (addr >= memory_start && (addr + size) <= physical_mem_end)
+	if (in_mem_const_off(addr, size, _etext_l1 - _stext_l1, L1_CODE_START, L1_CODE_LENGTH))
 		return 1;
-#endif
-	if (addr >= (unsigned long)__init_begin &&
-	    addr + size <= (unsigned long)__init_end)
+	if (in_mem_const_off(addr, size, _ebss_l1 - _sdata_l1, L1_DATA_A_START, L1_DATA_A_LENGTH))
 		return 1;
-	if (addr >= get_l1_scratch_start()
-	    && addr + size <= get_l1_scratch_start() + L1_SCRATCH_LENGTH)
+	if (in_mem_const_off(addr, size, _ebss_b_l1 - _sdata_b_l1, L1_DATA_B_START, L1_DATA_B_LENGTH))
 		return 1;
-#if L1_CODE_LENGTH != 0
-	if (addr >= get_l1_code_start() + (_etext_l1 - _stext_l1)
-	    && addr + size <= get_l1_code_start() + L1_CODE_LENGTH)
+#ifdef COREB_L1_CODE_START
+	if (in_mem_const(addr, size, COREB_L1_CODE_START, L1_CODE_LENGTH))
 		return 1;
-#endif
-#if L1_DATA_A_LENGTH != 0
-	if (addr >= get_l1_data_a_start() + (_ebss_l1 - _sdata_l1)
-	    && addr + size <= get_l1_data_a_start() + L1_DATA_A_LENGTH)
+	if (in_mem_const(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
 		return 1;
-#endif
-#if L1_DATA_B_LENGTH != 0
-	if (addr >= get_l1_data_b_start() + (_ebss_b_l1 - _sdata_b_l1)
-	    && addr + size <= get_l1_data_b_start() + L1_DATA_B_LENGTH)
+	if (in_mem_const(addr, size, COREB_L1_DATA_A_START, L1_DATA_A_LENGTH))
 		return 1;
-#endif
-#if L2_LENGTH != 0
-	if (addr >= L2_START + (_ebss_l2 - _stext_l2)
-	    && addr + size <= L2_START + L2_LENGTH)
+	if (in_mem_const(addr, size, COREB_L1_DATA_B_START, L1_DATA_B_LENGTH))
 		return 1;
 #endif
+	if (in_mem_const_off(addr, size, _ebss_l2 - _stext_l2, L2_START, L2_LENGTH))
+		return 1;
+
+	if (in_mem_const(addr, size, BOOT_ROM_START, BOOT_ROM_LENGTH))
+		return 1;
+	if (in_mem_const(addr, size, L1_ROM_START, L1_ROM_LENGTH))
+		return 1;
+
 	return 0;
 }
 EXPORT_SYMBOL(_access_ok);
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 6454babdfaff..298f023bcc09 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -117,15 +117,49 @@ void __cpuinit bfin_setup_caches(unsigned int cpu)
 	 */
 #ifdef CONFIG_BFIN_ICACHE
 	printk(KERN_INFO "Instruction Cache Enabled for CPU%u\n", cpu);
+	printk(KERN_INFO "  External memory:"
+# ifdef CONFIG_BFIN_EXTMEM_ICACHEABLE
+	       " cacheable"
+# else
+	       " uncacheable"
+# endif
+	       " in instruction cache\n");
+	if (L2_LENGTH)
+		printk(KERN_INFO "  L2 SRAM        :"
+# ifdef CONFIG_BFIN_L2_ICACHEABLE
+		       " cacheable"
+# else
+		       " uncacheable"
+# endif
+		       " in instruction cache\n");
+
+#else
+	printk(KERN_INFO "Instruction Cache Disabled for CPU%u\n", cpu);
 #endif
+
 #ifdef CONFIG_BFIN_DCACHE
-	printk(KERN_INFO "Data Cache Enabled for CPU%u"
-# if defined CONFIG_BFIN_WB
-		" (write-back)"
-# elif defined CONFIG_BFIN_WT
-		" (write-through)"
+	printk(KERN_INFO "Data Cache Enabled for CPU%u\n", cpu);
+	printk(KERN_INFO "  External memory:"
+# if defined CONFIG_BFIN_EXTMEM_WRITEBACK
+	       " cacheable (write-back)"
+# elif defined CONFIG_BFIN_EXTMEM_WRITETHROUGH
+	       " cacheable (write-through)"
+# else
+	       " uncacheable"
 # endif
-		"\n", cpu);
+	       " in data cache\n");
+	if (L2_LENGTH)
+		printk(KERN_INFO "  L2 SRAM        :"
+# if defined CONFIG_BFIN_L2_WRITEBACK
+		       " cacheable (write-back)"
+# elif defined CONFIG_BFIN_L2_WRITETHROUGH
+		       " cacheable (write-through)"
+# else
+		       " uncacheable"
+# endif
+		       " in data cache\n");
+#else
+	printk(KERN_INFO "Data Cache Disabled for CPU%u\n", cpu);
 #endif
 }
 
@@ -443,9 +477,11 @@ static __init void parse_cmdline_early(char *cmdline_p)
 			} else if (!memcmp(to, "clkin_hz=", 9)) {
 				to += 9;
 				early_init_clkin_hz(to);
+#ifdef CONFIG_EARLY_PRINTK
 			} else if (!memcmp(to, "earlyprintk=", 12)) {
 				to += 12;
 				setup_early_printk(to);
+#endif
 			} else if (!memcmp(to, "memmap=", 7)) {
 				to += 7;
 				parse_memmap(to);
@@ -516,7 +552,7 @@ static __init void memory_setup(void)
 	    && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
 		mtd_size =
 		    PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
-#  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
+#  if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
 	/* Due to a Hardware Anomaly we need to limit the size of usable
 	 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 	 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
@@ -544,7 +580,7 @@ static __init void memory_setup(void)
 	dma_memcpy((void *)uclinux_ram_map.phys, _end, uclinux_ram_map.size);
 #endif				/* CONFIG_MTD_UCLINUX */
 
-#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
+#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
 	/* Due to a Hardware Anomaly we need to limit the size of usable
 	 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 	 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
@@ -764,6 +800,11 @@ void __init setup_arch(char **cmdline_p)
 {
 	unsigned long sclk, cclk;
 
+	/* Check to make sure we are running on the right processor */
+	if (unlikely(CPUID != bfin_cpuid()))
+		printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
+			CPU, bfin_cpuid(), bfin_revid());
+
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif
@@ -778,14 +819,17 @@ void __init setup_arch(char **cmdline_p)
 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
 
-	/* setup memory defaults from the user config */
-	physical_mem_end = 0;
-	_ramend = get_mem_size() * 1024 * 1024;
-
 	memset(&bfin_memmap, 0, sizeof(bfin_memmap));
 
+	/* If the user does not specify things on the command line, use
+	 * what the bootloader set things up as
+	 */
+	physical_mem_end = 0;
 	parse_cmdline_early(&command_line[0]);
 
+	if (_ramend == 0)
+		_ramend = get_mem_size() * 1024 * 1024;
+
 	if (physical_mem_end == 0)
 		physical_mem_end = _ramend;
 
@@ -837,7 +881,8 @@ void __init setup_arch(char **cmdline_p)
     defined(CONFIG_BF538) || defined(CONFIG_BF539)
 	_bfin_swrst = bfin_read_SWRST();
 #else
-	_bfin_swrst = bfin_read_SYSCR();
+	/* Clear boot mode field */
+	_bfin_swrst = bfin_read_SYSCR() & ~0xf;
 #endif
 
 #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
@@ -875,10 +920,7 @@ void __init setup_arch(char **cmdline_p)
 	else
 		printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
 
-	if (unlikely(CPUID != bfin_cpuid()))
-		printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
-			CPU, bfin_cpuid(), bfin_revid());
-	else {
+	if (likely(CPUID == bfin_cpuid())) {
 		if (bfin_revid() != bfin_compiled_revid()) {
 			if (bfin_compiled_revid() == -1)
 				printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
@@ -1157,16 +1199,25 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		icache_size = 0;
 
 	seq_printf(m, "cache size\t: %d KB(L1 icache) "
-		"%d KB(L1 dcache%s) %d KB(L2 cache)\n",
-		icache_size, dcache_size,
-#if defined CONFIG_BFIN_WB
-		"-wb"
-#elif defined CONFIG_BFIN_WT
-		"-wt"
-#endif
-		"", 0);
-
+		"%d KB(L1 dcache) %d KB(L2 cache)\n",
+		icache_size, dcache_size, 0);
 	seq_printf(m, "%s\n", cache);
+	seq_printf(m, "external memory\t: "
+#if defined(CONFIG_BFIN_EXTMEM_ICACHEABLE)
+		   "cacheable"
+#else
+		   "uncacheable"
+#endif
+		   " in instruction cache\n");
+	seq_printf(m, "external memory\t: "
+#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK)
+		      "cacheable (write-back)"
+#elif defined(CONFIG_BFIN_EXTMEM_WRITETHROUGH)
+		      "cacheable (write-through)"
+#else
+		      "uncacheable"
+#endif
+		      " in data cache\n");
 
 	if (icache_size)
 		seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
@@ -1239,8 +1290,25 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	if (cpu_num != num_possible_cpus() - 1)
 		return 0;
 
-	if (L2_LENGTH)
+	if (L2_LENGTH) {
 		seq_printf(m, "L2 SRAM\t\t: %dKB\n", L2_LENGTH/0x400);
+		seq_printf(m, "L2 SRAM\t\t: "
+#if defined(CONFIG_BFIN_L2_ICACHEABLE)
+			      "cacheable"
+#else
+			      "uncacheable"
+#endif
+			      " in instruction cache\n");
+		seq_printf(m, "L2 SRAM\t\t: "
+#if defined(CONFIG_BFIN_L2_WRITEBACK)
+			      "cacheable (write-back)"
+#elif defined(CONFIG_BFIN_L2_WRITETHROUGH)
+			      "cacheable (write-through)"
+#else
+			      "uncacheable"
+#endif
+			      " in data cache\n");
+	}
 	seq_printf(m, "board name\t: %s\n", bfin_board_name);
 	seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
 		 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index d279552fe9b0..8eeb457ce5d5 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -37,6 +37,7 @@
 #include <asm/traps.h>
 #include <asm/cacheflush.h>
 #include <asm/cplb.h>
+#include <asm/dma.h>
 #include <asm/blackfin.h>
 #include <asm/irq_handler.h>
 #include <linux/irq.h>
@@ -636,57 +637,30 @@ asmlinkage void trap_c(struct pt_regs *fp)
  */
 static bool get_instruction(unsigned short *val, unsigned short *address)
 {
-
-	unsigned long addr;
-
-	addr = (unsigned long)address;
+	unsigned long addr = (unsigned long)address;
 
 	/* Check for odd addresses */
 	if (addr & 0x1)
 		return false;
 
-	/* Check that things do not wrap around */
-	if (addr > (addr + 2))
+	/* MMR region will never have instructions */
+	if (addr >= SYSMMR_BASE)
 		return false;
 
-	/*
-	 * Since we are in exception context, we need to do a little address checking
-	 * We need to make sure we are only accessing valid memory, and
-	 * we don't read something in the async space that can hang forever
-	 */
-	if ((addr >= FIXED_CODE_START && (addr + 2) <= physical_mem_end) ||
-#if L2_LENGTH != 0
-	    (addr >= L2_START && (addr + 2) <= (L2_START + L2_LENGTH)) ||
-#endif
-	    (addr >= BOOT_ROM_START && (addr + 2) <= (BOOT_ROM_START + BOOT_ROM_LENGTH)) ||
-#if L1_DATA_A_LENGTH != 0
-	    (addr >= L1_DATA_A_START && (addr + 2) <= (L1_DATA_A_START + L1_DATA_A_LENGTH)) ||
-#endif
-#if L1_DATA_B_LENGTH != 0
-	    (addr >= L1_DATA_B_START && (addr + 2) <= (L1_DATA_B_START + L1_DATA_B_LENGTH)) ||
-#endif
-	    (addr >= L1_SCRATCH_START && (addr + 2) <= (L1_SCRATCH_START + L1_SCRATCH_LENGTH)) ||
-	    (!(bfin_read_EBIU_AMBCTL0() & B0RDYEN) &&
-	       addr >= ASYNC_BANK0_BASE && (addr + 2) <= (ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE)) ||
-	    (!(bfin_read_EBIU_AMBCTL0() & B1RDYEN) &&
-	       addr >= ASYNC_BANK1_BASE && (addr + 2) <= (ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE)) ||
-	    (!(bfin_read_EBIU_AMBCTL1() & B2RDYEN) &&
-	       addr >= ASYNC_BANK2_BASE && (addr + 2) <= (ASYNC_BANK2_BASE + ASYNC_BANK1_SIZE)) ||
-	    (!(bfin_read_EBIU_AMBCTL1() & B3RDYEN) &&
-	      addr >= ASYNC_BANK3_BASE && (addr + 2) <= (ASYNC_BANK3_BASE + ASYNC_BANK1_SIZE))) {
-		*val = *address;
-		return true;
+	switch (bfin_mem_access_type(addr, 2)) {
+		case BFIN_MEM_ACCESS_CORE:
+		case BFIN_MEM_ACCESS_CORE_ONLY:
+			*val = *address;
+			return true;
+		case BFIN_MEM_ACCESS_DMA:
+			dma_memcpy(val, address, 2);
+			return true;
+		case BFIN_MEM_ACCESS_ITEST:
+			isram_memcpy(val, address, 2);
+			return true;
+		default: /* invalid access */
+			return false;
 	}
-
-#if L1_CODE_LENGTH != 0
-	if (addr >= L1_CODE_START && (addr + 2) <= (L1_CODE_START + L1_CODE_LENGTH)) {
-		isram_memcpy(val, address, 2);
-		return true;
-	}
-#endif
-
-
-	return false;
 }
 
 /*