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devmem2: add support for different page sizes

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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>
This commit is contained in:
Denys Dmytriyenko
2022-05-05 21:51:26 +00:00
committed by Khem Raj
parent e192bd13ff
commit 3af1d119de
2 changed files with 38 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta-oe/recipes-support/devmem2/devmem2.bb
+3 -1
View File
@@ -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}"
meta-oe/recipes-support/devmem2/devmem2/0001-devmem2-support-different-page-sizes-at-run-time.patch
+35
View File
@@ -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