devmem2: add support for different page sizes

Instead of hardcoding 4K page size, query the system and use the value for
memory mapping.

Signed-off-by: Denys Dmytriyenko <denis@denix.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit 3af1d119de53a92f4d0fbfb8a61f999d1d541253)
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 38 insertions, 1 deletions

diff --git a/meta-oe/recipes-support/devmem2/devmem2.bb b/meta-oe/recipes-support/devmem2/devmem2.bb
index c6b8df5e47..ba7aad8ab9 100644
--- a/meta-oe/recipes-support/devmem2/devmem2.bb
+++ b/meta-oe/recipes-support/devmem2/devmem2.bb
@@ -5,7 +5,9 @@ PR = "r7"
 
 SRC_URI = "http://www.free-electrons.com/pub/mirror/devmem2.c;downloadfilename=devmem2-new.c \
            file://devmem2-fixups-2.patch;apply=yes;striplevel=0 \
-           file://0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch"
+           file://0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch \
+           file://0001-devmem2-support-different-page-sizes-at-run-time.patch \
+"
 
 S = "${WORKDIR}"
 
diff --git a/meta-oe/recipes-support/devmem2/devmem2/0001-devmem2-support-different-page-sizes-at-run-time.patch b/meta-oe/recipes-support/devmem2/devmem2/0001-devmem2-support-different-page-sizes-at-run-time.patch
new file mode 100644
index 0000000000..0da0732c57
--- /dev/null
+++ b/meta-oe/recipes-support/devmem2/devmem2/0001-devmem2-support-different-page-sizes-at-run-time.patch
@@ -0,0 +1,35 @@
+From 0f6af48b2fbc71ec8abe862d3e9eb6da7b03538b Mon Sep 17 00:00:00 2001
+From: Denys Dmytriyenko <denys@ti.com>
+Date: Wed, 8 Aug 2018 14:38:00 -0400
+Subject: [PATCH] devmem2: support different page sizes at run-time
+
+Signed-off-by: Denys Dmytriyenko <denys@ti.com>
+---
+ devmem2.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/devmem2.c b/devmem2.c
+index 68131b2..76af2d6 100644
+--- a/devmem2.c
++++ b/devmem2.c
+@@ -53,8 +53,6 @@
+ #define FATAL do { fprintf(stderr, "Error at line %d, file %s (%d) [%s]\n", \
+   __LINE__, __FILE__, errno, strerror(errno)); exit(1); } while(0)
+  
+-#define MAP_SIZE 4096UL
+-#define MAP_MASK (MAP_SIZE - 1)
+ 
+ static inline void *fixup_addr(void *addr, size_t size);
+ 
+@@ -66,6 +64,8 @@ int main(int argc, char **argv) {
+        int access_type = 'w';
+        char fmt_str[128];
+        size_t data_size;
++       unsigned long MAP_SIZE = sysconf(_SC_PAGE_SIZE);
++       unsigned long MAP_MASK = (MAP_SIZE - 1);
+        
+        if(argc < 2) {
+                fprintf(stderr, "\nUsage:\t%s { address } [ type [ data ] ]\n"
+-- 
+2.7.4
+