Merge tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze

Pull Microblaze update from Michal Simek:

 - enable CMA

 - add support for MB v11

 - defconfig updates

 - minor fixes

* tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Add ID for Microblaze v11
  microblaze: Prevent the overflow of the start
  microblaze: Wire CMA allocator
  asm-generic: Make dma-contiguous.h a mandatory include/asm header
  microblaze: Sync defconfig with latest Kconfig layout
  microblaze: defconfig: Disable EXT2 driver and Enable EXT3 & EXT4 drivers
  microblaze: Align comments with register usage

7 files changed, 19 insertions, 10 deletions

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index a105f113fd67..6a331bd57ea8 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -27,6 +27,7 @@ config MICROBLAZE
 	select HAVE_ARCH_HASH
 	select HAVE_ARCH_KGDB
 	select HAVE_DEBUG_KMEMLEAK
+	select HAVE_DMA_CONTIGUOUS
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_FUNCTION_GRAPH_TRACER
diff --git a/arch/microblaze/configs/mmu_defconfig b/arch/microblaze/configs/mmu_defconfig
index b3b433db89d8..9b8a50f30662 100644
--- a/arch/microblaze/configs/mmu_defconfig
+++ b/arch/microblaze/configs/mmu_defconfig
@@ -26,6 +26,7 @@ CONFIG_MODULE_UNLOAD=y
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_PARTITION_ADVANCED=y
 # CONFIG_EFI_PARTITION is not set
+CONFIG_CMA=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
@@ -73,7 +74,7 @@ CONFIG_FB_XILINX=y
 CONFIG_UIO=y
 CONFIG_UIO_PDRV_GENIRQ=y
 CONFIG_UIO_DMEM_GENIRQ=y
-CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
 # CONFIG_DNOTIFY is not set
 CONFIG_TMPFS=y
 CONFIG_CRAMFS=y
@@ -82,10 +83,11 @@ CONFIG_NFS_FS=y
 CONFIG_CIFS=y
 CONFIG_CIFS_STATS2=y
 CONFIG_ENCRYPTED_KEYS=y
+CONFIG_DMA_CMA=y
 CONFIG_DEBUG_INFO=y
-CONFIG_DEBUG_SLAB=y
-CONFIG_DETECT_HUNG_TASK=y
-CONFIG_DEBUG_SPINLOCK=y
 CONFIG_KGDB=y
 CONFIG_KGDB_TESTS=y
 CONFIG_KGDB_KDB=y
+CONFIG_DEBUG_SLAB=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_DEBUG_SPINLOCK=y
diff --git a/arch/microblaze/configs/nommu_defconfig b/arch/microblaze/configs/nommu_defconfig
index 377de39ccb8c..8c420782d6e4 100644
--- a/arch/microblaze/configs/nommu_defconfig
+++ b/arch/microblaze/configs/nommu_defconfig
@@ -70,7 +70,7 @@ CONFIG_XILINX_WATCHDOG=y
 CONFIG_FB=y
 CONFIG_FB_XILINX=y
 # CONFIG_USB_SUPPORT is not set
-CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
 # CONFIG_DNOTIFY is not set
 CONFIG_CRAMFS=y
 CONFIG_ROMFS_FS=y
diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
index 0bde47e4fa69..dcba53803fa5 100644
--- a/arch/microblaze/kernel/cpu/cache.c
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -92,7 +92,8 @@ static inline void __disable_dcache_nomsr(void)
 #define CACHE_LOOP_LIMITS(start, end, cache_line_length, cache_size)	\
 do {									\
 	int align = ~(cache_line_length - 1);				\
-	end = min(start + cache_size, end);				\
+	if (start <  UINT_MAX - cache_size)				\
+		end = min(start + cache_size, end);			\
 	start &= align;							\
 } while (0)
 
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
index ef2f49471a2a..cd9b4450763b 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -51,6 +51,7 @@ const struct cpu_ver_key cpu_ver_lookup[] = {
 	{"9.5", 0x22},
 	{"9.6", 0x23},
 	{"10.0", 0x24},
+	{"11.0", 0x25},
 	{NULL, 0},
 };
 
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index 7d2894418691..14b276406153 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -121,10 +121,10 @@ no_fdt_arg:
 	tophys(r4,r4)			/* convert to phys address */
 	ori	r3, r0, COMMAND_LINE_SIZE - 1 /* number of loops */
 _copy_command_line:
-	/* r2=r5+r6 - r5 contain pointer to command line */
+	/* r2=r5+r11 - r5 contain pointer to command line */
 	lbu	r2, r5, r11
 	beqid	r2, skip		/* Skip if no data */
-	sb	r2, r4, r11		/* addr[r4+r6]= r2 */
+	sb	r2, r4, r11		/* addr[r4+r11]= r2 */
 	addik	r11, r11, 1		/* increment counting */
 	bgtid	r3, _copy_command_line	/* loop for all entries       */
 	addik	r3, r3, -1		/* decrement loop */
@@ -139,8 +139,8 @@ skip:
 	ori	r4, r0, TOPHYS(_bram_load_start)	/* save bram context */
 	ori	r3, r0, (LMB_SIZE - 4)
 _copy_bram:
-	lw	r7, r0, r11		/* r7 = r0 + r6 */
-	sw	r7, r4, r11		/* addr[r4 + r6] = r7 */
+	lw	r7, r0, r11		/* r7 = r0 + r11 */
+	sw	r7, r4, r11		/* addr[r4 + r11] = r7 */
 	addik	r11, r11, 4		/* increment counting */
 	bgtid	r3, _copy_bram		/* loop for all entries */
 	addik	r3, r3, -4		/* descrement loop */
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 050fc621c920..1056f1674065 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -7,6 +7,7 @@
  * for more details.
  */
 
+#include <linux/dma-contiguous.h>
 #include <linux/memblock.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -345,6 +346,9 @@ asmlinkage void __init mmu_init(void)
 	/* This will also cause that unflatten device tree will be allocated
 	 * inside 768MB limit */
 	memblock_set_current_limit(memory_start + lowmem_size - 1);
+
+	/* CMA initialization */
+	dma_contiguous_reserve(memory_start + lowmem_size - 1);
 }
 
 /* This is only called until mem_init is done. */