arc: axs10x - bump u-boot to 2016.03 release

Updating u-boot version to one of the latest stable versions.

Add u-boot patch to fix verifying checksum problem with the latest bit-file:
[U-Boot] arc/cache: really do flush_dcache_all() even if IOC exists,
u-boot patch which adds virt_to_phys() stub for ARC:
[U-Boot] arc: Add virt_to_phys() stub,
u-boot patch which disables IOC in U-Boot:
[PATCH] arc/cache: Disable IOC

Signed-off-by: Lada Trimasova <ltrimas@synopsys.com>

boot/uboot/U-Boot-arc-Add-virt_to_phys-stub.patch

@@ -0,0 +1,44 @@
+From patchwork Fri Apr 8 17:00:07 2016
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [U-Boot] arc: Add virt_to_phys() stub
+From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
+X-Patchwork-Id: 608123
+Message-Id: <1460134807-16503-1-git-send-email-abrodkin@synopsys.com>
+To: u-boot@lists.denx.de
+Cc: Marek Vasut <marex@denx.de>, Alexey Brodkin <Alexey.Brodkin@synopsys.com>
+Date: Fri, 8 Apr 2016 10:00:07 -0700
+
+Commit cf7c93cdd755 "usb: ehci: Implement V2P mapping"
+introduced usage of virt_to_phys() in ehci-hcd.
+
+Since there was no implementation of virt_to_phys() for ARC
+compilation of the ehci-generic driver failed.
+
+This change adds virt_to_phys() stub for ARC so now
+USB driver for AXS101 board could be built again.
+
+Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
+Cc: Marek Vasut <marex@denx.de>
+Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
+Cc: Hans de Goede <hdegoede@redhat.com>
+Acked-by: Marek Vasut <marex@denx.de>
+---
+ arch/arc/include/asm/io.h | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
+index 281682c..b6f7724 100644
+--- a/arch/arc/include/asm/io.h
++++ b/arch/arc/include/asm/io.h
+@@ -239,4 +239,9 @@ static inline int __raw_writesl(unsigned int addr, void *data, int longlen)
+ #define setbits_8(addr, set) setbits(8, addr, set)
+ #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
+
++static inline phys_addr_t virt_to_phys(void *vaddr)
++{
++ return (phys_addr_t)((unsigned long)vaddr);
++}
++
+ #endif /* __ASM_ARC_IO_H */

boot/uboot/U-Boot-arc-cache-Disable-IOC.patch

@@ -0,0 +1,58 @@
+From 9a6dd15b56b5bb005290d0e4f51e76d384b6c1e6 Mon Sep 17 00:00:00 2001
+From: Alexey Brodkin <abrodkin@synopsys.com>
+Date: Mon, 25 Apr 2016 13:21:01 +0300
+Subject: [PATCH] arc/cache: Disable IOC
+
+As of today there's no way in U-Boot to distinguish
+cache operations on data being DMAed to or from memory
+and all those CPUs do them selves on memory.
+
+If IOC block was detected we disabled all cache operations
+and that was completely fine for data being transferred
+by means of DMA simply because IOC did its work and
+made sure data is coherent.
+
+But except DMA that changes memory in U-Boot
+we sometimes need to alter memory contents as well.
+And it applies not only to data but to instructions as well.
+These are 2 very good examples:
+ 1) U-Boot's self relocation
+ 2) Kick-start of slave cores in SMP systems
+
+In both above cases we modify code and if instructions
+caches of CPUs won't be updated until that new code gets
+pushed out of data cache of the core which made modification
+to either SLC or in external memory (if there's no SLC).
+
+So until there's a good and clean solution on cache management for
+2 separate cases (DMA and instructions) we'll disable IOC in U-Boot.
+
+Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
+---
+ arch/arc/lib/cache.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
+index d1fb661..b52d7be 100644
+--- a/arch/arc/lib/cache.c
++++ b/arch/arc/lib/cache.c
+@@ -148,7 +148,7 @@ static void read_decode_cache_bcr_arcv2(void)
+ slc_exists = 1;
+ slc_line_sz = (slc_cfg.fields.lsz == 0) ? 128 : 64;
+ }
+-
++#if 0 /* Disable IOC due to inability to distinguish ops on DMA data and not */
+ union {
+ struct bcr_clust_cfg {
+ #ifdef CONFIG_CPU_BIG_ENDIAN
+@@ -163,6 +163,7 @@ static void read_decode_cache_bcr_arcv2(void)
+ cbcr.word = read_aux_reg(ARC_BCR_CLUSTER);
+ if (cbcr.fields.c)
+ ioc_exists = 1;
++#endif
+ }
+ #endif
+
+-- 
+2.5.0
+

boot/uboot/U-Boot-arc-cache-really-do-flush_dcache_all-even-if-IOC-exists.patch

@@ -0,0 +1,45 @@
+From patchwork Mon Apr 18 10:28:39 2016
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [U-Boot] arc/cache: really do flush_dcache_all() even if IOC exists
+From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
+X-Patchwork-Id: 611647
+Message-Id: <1460975319-6187-1-git-send-email-abrodkin@synopsys.com>
+To: u-boot@lists.denx.de
+Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
+Date: Mon, 18 Apr 2016 13:28:39 +0300
+
+flush_dcache_all() is used in the very end of U-Boot self relocation
+to write back all copied and then patched code and data to their
+new location in the very end of available memory space.
+
+Since that has nothing to do with IO (i.e. no external DMA happens
+here) IOC won't help here and we need to write back data cache contents
+manually.
+
+Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
+---
+ arch/arc/lib/cache.c | 7 ++-----
+ 1 file changed, 2 insertions(+), 5 deletions(-)
+
+diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
+index 56988dd..d1fb661 100644
+--- a/arch/arc/lib/cache.c
++++ b/arch/arc/lib/cache.c
+@@ -430,13 +430,10 @@ void invalidate_dcache_all(void)
+
+ void flush_dcache_all(void)
+ {
+-#ifdef CONFIG_ISA_ARCV2
+- if (!ioc_exists)
+-#endif
+- __dc_entire_op(OP_FLUSH);
++ __dc_entire_op(OP_FLUSH);
+
+ #ifdef CONFIG_ISA_ARCV2
+- if (slc_exists && !ioc_exists)
++ if (slc_exists)
+ __slc_entire_op(OP_FLUSH);
+ #endif
+ }

configs/snps_axs101_defconfig

@@ -21,7 +21,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="axs101"
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2015.07"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2016.03"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="axs101"
 
 # Extra toolchain options for HS38 VDK release

configs/snps_axs103_defconfig

@@ -22,7 +22,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="axs103_smp"
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2015.07"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2016.03"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="axs103"
 
 # Extra toolchain options for HS38 VDK release