4 files changed, 31 insertions, 17 deletions

diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 704849bd0c7..b3e5d24a322 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -360,6 +360,7 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
 #ifdef CONFIG_CPU_V7M
 	ulong addr = (ulong)kernel_entry | 1;
 	kernel_entry = (void *)addr;
+	dcache_disable();
 #endif
 	s = getenv("machid");
 	if (s) {
diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c
index e9bbcf51220..f0c1b03728b 100644
--- a/arch/arm/lib/cache-cp15.c
+++ b/arch/arm/lib/cache-cp15.c
@@ -22,16 +22,6 @@ __weak void arm_init_domains(void)
 {
 }
 
-static void cp_delay (void)
-{
-	volatile int i;
-
-	/* copro seems to need some delay between reading and writing */
-	for (i = 0; i < 100; i++)
-		nop();
-	asm volatile("" : : : "memory");
-}
-
 void set_section_dcache(int section, enum dcache_option option)
 {
 #ifdef CONFIG_ARMV7_LPAE
@@ -129,7 +119,7 @@ static inline void mmu_setup(void)
 		dram_bank_mmu_setup(i);
 	}
 
-#ifdef CONFIG_ARMV7_LPAE
+#if defined(CONFIG_ARMV7_LPAE) && __LINUX_ARM_ARCH__ != 4
 	/* Set up 4 PTE entries pointing to our 4 1GB page tables */
 	for (i = 0; i < 4; i++) {
 		u64 *page_table = (u64 *)(gd->arch.tlb_addr + (4096 * 4));
@@ -147,7 +137,7 @@ static inline void mmu_setup(void)
 #endif
 
 	if (is_hyp()) {
-		/* Set HCTR to enable LPAE */
+		/* Set HTCR to enable LPAE */
 		asm volatile("mcr p15, 4, %0, c2, c0, 2"
 			: : "r" (reg) : "memory");
 		/* Set HTTBR0 */
@@ -172,6 +162,15 @@ static inline void mmu_setup(void)
 			: : "r" (MEMORY_ATTRIBUTES) : "memory");
 	}
 #elif defined(CONFIG_CPU_V7)
+	if (is_hyp()) {
+		/* Set HTCR to disable LPAE */
+		asm volatile("mcr p15, 4, %0, c2, c0, 2"
+			: : "r" (0) : "memory");
+	} else {
+		/* Set TTBCR to disable LPAE */
+		asm volatile("mcr p15, 0, %0, c2, c0, 2"
+			: : "r" (0) : "memory");
+	}
 	/* Set TTBR0 */
 	reg = gd->arch.tlb_addr & TTBR0_BASE_ADDR_MASK;
 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
@@ -196,7 +195,6 @@ static inline void mmu_setup(void)
 
 	/* and enable the mmu */
 	reg = get_cr();	/* get control reg. */
-	cp_delay();
 	set_cr(reg | CR_M);
 }
 
@@ -214,7 +212,6 @@ static void cache_enable(uint32_t cache_bit)
 	if ((cache_bit == CR_C) && !mmu_enabled())
 		mmu_setup();
 	reg = get_cr();	/* get control reg. */
-	cp_delay();
 	set_cr(reg | cache_bit);
 }
 
@@ -224,7 +221,6 @@ static void cache_disable(uint32_t cache_bit)
 	uint32_t reg;
 
 	reg = get_cr();
-	cp_delay();
 
 	if (cache_bit == CR_C) {
 		/* if cache isn;t enabled no need to disable */
@@ -234,7 +230,7 @@ static void cache_disable(uint32_t cache_bit)
 		cache_bit |= CR_M;
 	}
 	reg = get_cr();
-	cp_delay();
+
 	if (cache_bit == (CR_C | CR_M))
 		flush_dcache_all();
 	set_cr(reg & ~cache_bit);
diff --git a/arch/arm/lib/interrupts.c b/arch/arm/lib/interrupts.c
index 066c172bb32..80869adb610 100644
--- a/arch/arm/lib/interrupts.c
+++ b/arch/arm/lib/interrupts.c
@@ -93,10 +93,18 @@ void show_regs (struct pt_regs *regs)
 		thumb_mode (regs) ? " (T)" : "");
 }
 
+/* fixup PC to point to the instruction leading to the exception */
+static inline void fixup_pc(struct pt_regs *regs, int offset)
+{
+	uint32_t pc = instruction_pointer(regs) + offset;
+	regs->ARM_pc = pc | (regs->ARM_pc & PCMASK);
+}
+
 void do_undefined_instruction (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("undefined instruction\n");
+	fixup_pc(pt_regs, -4);
 	show_regs (pt_regs);
 	bad_mode ();
 }
@@ -105,6 +113,7 @@ void do_software_interrupt (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("software interrupt\n");
+	fixup_pc(pt_regs, -4);
 	show_regs (pt_regs);
 	bad_mode ();
 }
@@ -113,6 +122,7 @@ void do_prefetch_abort (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("prefetch abort\n");
+	fixup_pc(pt_regs, -8);
 	show_regs (pt_regs);
 	bad_mode ();
 }
@@ -121,6 +131,7 @@ void do_data_abort (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("data abort\n");
+	fixup_pc(pt_regs, -8);
 	show_regs (pt_regs);
 	bad_mode ();
 }
@@ -129,6 +140,7 @@ void do_not_used (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("not used\n");
+	fixup_pc(pt_regs, -8);
 	show_regs (pt_regs);
 	bad_mode ();
 }
@@ -137,6 +149,7 @@ void do_fiq (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("fast interrupt request\n");
+	fixup_pc(pt_regs, -8);
 	show_regs (pt_regs);
 	bad_mode ();
 }
@@ -145,6 +158,7 @@ void do_irq (struct pt_regs *pt_regs)
 {
 	efi_restore_gd();
 	printf ("interrupt request\n");
+	fixup_pc(pt_regs, -8);
 	show_regs (pt_regs);
 	bad_mode ();
 }
diff --git a/arch/arm/lib/vectors.S b/arch/arm/lib/vectors.S
index f53b1e9a2bc..101909103e4 100644
--- a/arch/arm/lib/vectors.S
+++ b/arch/arm/lib/vectors.S
@@ -117,7 +117,6 @@ data_abort:
 not_used:
 irq:
 fiq:
-
 1:
 	bl	1b			/* hang and never return */
 
@@ -126,7 +125,11 @@ fiq:
 /* IRQ stack memory (calculated at run-time) + 8 bytes */
 .globl IRQ_STACK_START_IN
 IRQ_STACK_START_IN:
+#ifdef IRAM_BASE_ADDR
+	.word   IRAM_BASE_ADDR + 0x20
+#else
 	.word	0x0badc0de
+#endif
 
 @
 @ IRQ stack frame.