linux-yocto_3.10: Backport patches for MicroBlaze

* The linux-yocto 3.10 kernel is missing a patch that should be in 3.10,
  backport the patch from mainline
* Backport some patches from mainline to fix issues with MicroBlaze

Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com>

4 files changed, 128 insertions, 1 deletions

diff --git a/recipes-kernel/linux/linux-yocto/218a12f1f41f6fdce18d084e5ddd3c6439db0983.patch b/recipes-kernel/linux/linux-yocto/218a12f1f41f6fdce18d084e5ddd3c6439db0983.patch
new file mode 100644
index 00000000..9f113815
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto/218a12f1f41f6fdce18d084e5ddd3c6439db0983.patch
@@ -0,0 +1,32 @@
+From 218a12f1f41f6fdce18d084e5ddd3c6439db0983 Mon Sep 17 00:00:00 2001
+From: Graeme Smecher <gsmecher@threespeedlogic.com>
+Date: Sat, 8 Jun 2013 09:52:08 -0700
+Subject: microblaze: Don't mark arch_kgdb_ops as const.
+
+Other architectures don't do it, and it conflicts with the extern'd definition
+in include/linux/kgdb.h.
+
+The patch fails checkpatch but it reflects current
+functions declaration and solved compilation error.
+
+Signed-off-by: Graeme Smecher <gsmecher@threespeedlogic.com>
+CC: Michal Simek <monstr@monstr.eu>
+CC: linux-kernel@vger.kernel.org
+Signed-off-by: Michal Simek <michal.simek@xilinx.com>
+Upstream-Status: Backport
+---
+diff --git a/arch/microblaze/kernel/kgdb.c b/arch/microblaze/kernel/kgdb.c
+index 8adc9244..09a5e82 100644
+--- a/arch/microblaze/kernel/kgdb.c
++++ b/arch/microblaze/kernel/kgdb.c
+@@ -141,7 +141,7 @@ void kgdb_arch_exit(void)
+ /*
+  * Global data
+  */
+-const struct kgdb_arch arch_kgdb_ops = {
++struct kgdb_arch arch_kgdb_ops = {
+ #ifdef __MICROBLAZEEL__
+        .gdb_bpt_instr = {0x18, 0x00, 0x0c, 0xba}, /* brki r16, 0x18 */
+ #else
+-- 
+
diff --git a/recipes-kernel/linux/linux-yocto/7f15a256b556bf26780d7a0bd03c88914a852022.patch b/recipes-kernel/linux/linux-yocto/7f15a256b556bf26780d7a0bd03c88914a852022.patch
new file mode 100644
index 00000000..509b1f17
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto/7f15a256b556bf26780d7a0bd03c88914a852022.patch
@@ -0,0 +1,44 @@
+From 7f15a256b556bf26780d7a0bd03c88914a852022 Mon Sep 17 00:00:00 2001
+From: Michal Simek <michal.simek@xilinx.com>
+Date: Wed, 6 Nov 2013 16:36:08 +0100
+Subject: microblaze: Calculate kernel pad automatically
+
+The kernel needs to setup the first two tlbs with pad
+which is used for early page allocation which is used
+by mapin_ram() to allocate tables for lowmem memory
+before memory initialisation is done.
+Calculate pad directly from lowmem size.
+
+Signed-off-by: Michal Simek <michal.simek@xilinx.com>
+Upstream-Status: Backport
+---
+diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
+index d8ec74b..655e1ca 100644
+--- a/arch/microblaze/Kconfig
++++ b/arch/microblaze/Kconfig
+@@ -245,10 +245,6 @@ config MICROBLAZE_64K_PAGES
+ 
+ endchoice
+ 
+-config KERNEL_PAD
+-       hex "Kernel PAD for unpacking" if ADVANCED_OPTIONS
+-       default "0x80000" if MMU
+-
+ endmenu
+ 
+ source "mm/Kconfig"
+diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
+index fcc797f..817b7ee 100644
+--- a/arch/microblaze/kernel/head.S
++++ b/arch/microblaze/kernel/head.S
+@@ -176,7 +176,7 @@ _invalidate:
+        /* start to do TLB calculation */
+        addik   r12, r0, _end
+        rsub    r12, r3, r12
+-       addik   r12, r12, CONFIG_KERNEL_PAD /* that's the pad */
++       addik   r12, r12, CONFIG_LOWMEM_SIZE >> PTE_SHIFT /* that's the pad */
+ 
+        or r9, r0, r0 /* TLB0 = 0 */
+        or r10, r0, r0 /* TLB1 = 0 */
+-- 
+
diff --git a/recipes-kernel/linux/linux-yocto/99399545d62533b4ae742190b5c6b11f7a5826d9.patch b/recipes-kernel/linux/linux-yocto/99399545d62533b4ae742190b5c6b11f7a5826d9.patch
new file mode 100644
index 00000000..e81caf11
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto/99399545d62533b4ae742190b5c6b11f7a5826d9.patch
@@ -0,0 +1,46 @@
+From 99399545d62533b4ae742190b5c6b11f7a5826d9 Mon Sep 17 00:00:00 2001
+From: Michal Simek <michal.simek@xilinx.com>
+Date: Mon, 16 Sep 2013 07:46:23 +0200
+Subject: microblaze: Fix bug with mmap2 syscall MB implementation
+
+Fix mmap2 behaviour which incorrectly works with pgoff
+not in 4k units.
+
+Reported-by: Rich Felker <dalias@aerifal.cx>
+Signed-off-by: Michal Simek <michal.simek@xilinx.com>
+Upstream-Status: Backport
+---
+diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
+index e80a6c0..f1e1f66 100644
+--- a/arch/microblaze/kernel/sys_microblaze.c
++++ b/arch/microblaze/kernel/sys_microblaze.c
+@@ -42,3 +42,14 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
+ 
+        return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
+ }
++
++SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
++               unsigned long, prot, unsigned long, flags, unsigned long, fd,
++               unsigned long, pgoff)
++{
++       if (pgoff & (~PAGE_MASK >> 12))
++               return -EINVAL;
++
++       return sys_mmap_pgoff(addr, len, prot, flags, fd,
++                             pgoff >> (PAGE_SHIFT - 12));
++}
+diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
+index 4fca56c..b882ad5 100644
+--- a/arch/microblaze/kernel/syscall_table.S
++++ b/arch/microblaze/kernel/syscall_table.S
+@@ -192,7 +192,7 @@ ENTRY(sys_call_table)
+        .long sys_ni_syscall            /* reserved for streams2 */
+        .long sys_vfork         /* 190 */
+        .long sys_getrlimit
+-       .long sys_mmap_pgoff            /* mmap2 */
++       .long sys_mmap2
+        .long sys_truncate64
+        .long sys_ftruncate64
+        .long sys_stat64                /* 195 */
+-- 
+
diff --git a/recipes-kernel/linux/linux-yocto_3.10.bbappend b/recipes-kernel/linux/linux-yocto_3.10.bbappend
index a8b72e04..03a5da7d 100644
--- a/recipes-kernel/linux/linux-yocto_3.10.bbappend
+++ b/recipes-kernel/linux/linux-yocto_3.10.bbappend
@@ -3,4 +3,9 @@ require linux-xilinx-configs.inc
 require linux-xilinx-machines.inc
 
 FILESEXTRAPATHS_prepend := "${THISDIR}/linux-yocto:"
-SRC_URI_append_microblaze += "file://ec2eba55f0c0e74dd39aca14dcc597583cf1eb67.patch"
+SRC_URI_append_microblaze += " \
+                file://ec2eba55f0c0e74dd39aca14dcc597583cf1eb67.patch \
+                file://218a12f1f41f6fdce18d084e5ddd3c6439db0983.patch \
+                file://7f15a256b556bf26780d7a0bd03c88914a852022.patch \
+                file://99399545d62533b4ae742190b5c6b11f7a5826d9.patch \
+                "