Fix remoteproc to work with the PRU GNU Binutils port

merge: beagleboard/linux#47

fixes: dinuxbg/pru-gcc-examples#2
Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

patch.sh

@@ -210,6 +210,8 @@ fixes () {
 		start_cleanup
 	fi
 
+	${git} "${DIR}/patches/fixes/0001-Fix-remoteproc-to-work-with-the-PRU-GNU-Binutils-por.patch"
+
 	if [ "x${regenerate}" = "xenable" ] ; then
 		number=1
 		cleanup

patches/fixes/0001-Fix-remoteproc-to-work-with-the-PRU-GNU-Binutils-por.patch

@@ -0,0 +1,36 @@
+From 848d67b7b9810319f60f589e9dc4aa002824c14d Mon Sep 17 00:00:00 2001
+From: Dimitar Dimitrov <dinuxbg@gmail.com>
+Date: Sun, 11 Oct 2015 10:22:42 +0300
+Subject: [PATCH] Fix remoteproc to work with the PRU GNU Binutils port
+
+PRU IRAM addresses need to be masked before being handled to
+remoteproc. This is due to PRU Binutils' lack of separate address
+spaces for IRAM and DRAM.
+
+Signed-off-by: Dimitar Dimitrov <dinuxbg@gmail.com>
+---
+ drivers/remoteproc/pruss_remoteproc.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/drivers/remoteproc/pruss_remoteproc.c b/drivers/remoteproc/pruss_remoteproc.c
+index c465dea..3752378 100644
+--- a/drivers/remoteproc/pruss_remoteproc.c
++++ b/drivers/remoteproc/pruss_remoteproc.c
+@@ -313,6 +313,14 @@ static void *pru_i_da_to_va(struct pru_rproc *pru, u32 da, int len)
+ {
+ 	u32 offset;
+
++	/* GNU binutils do not support multiple address spaces. The
++	 * default linker script from the unofficial GNU pru-ld places
++	 * IRAM at an arbitrary high offset, in order to differentiate it
++	 * from DRAM. Hence we need to strip the artificial offset
++	 * from the IRAM address.
++	 */
++	da &= ~0xf0000000u;
++
+ 	if (len > 0 && da >= pru->iram_da &&
+ 	    da + len <= pru->iram_da + pru->mem_size[PRU_MEM_IRAM]) {
+ 		offset = da - pru->iram_da;
+-- 
+2.6.1
+

version.sh

@@ -19,7 +19,7 @@ toolchain="gcc_linaro_gnueabihf_4_9"
 #Kernel/Build
 KERNEL_REL=4.1
 KERNEL_TAG=${KERNEL_REL}.10
-BUILD=${build_prefix}-r23
+BUILD=${build_prefix}-r23.1
 kernel_rt=".7-rt8"
 
 #v4.X-rcX + upto SHA