devmem2: ensure word is 32-bit, add support for 64-bit long

Since sizeof(unsigned long) can be 8-byte on 64-bit architectures, use
uint32_t instead for "word" access to always be 4-byte/32-bit long.

Also introduce proper "long" 8-byte/64-bit access by using uint64_t.

Signed-off-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 73 insertions, 1 deletions

diff --git a/meta-oe/recipes-support/devmem2/devmem2.bb b/meta-oe/recipes-support/devmem2/devmem2.bb
index c86eb2e4bb..9bd1eb73d7 100644
--- a/meta-oe/recipes-support/devmem2/devmem2.bb
+++ b/meta-oe/recipes-support/devmem2/devmem2.bb
@@ -4,7 +4,9 @@ LIC_FILES_CHKSUM = "file://devmem2.c;endline=38;md5=a9eb9f3890384519f435aedf9862
 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://devmem2-fixups-2.patch;apply=yes;striplevel=0 \
+           file://0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch"
+
 S = "${WORKDIR}"
 
 CFLAGS += "-DFORCE_STRICT_ALIGNMENT"
diff --git a/meta-oe/recipes-support/devmem2/devmem2/0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch b/meta-oe/recipes-support/devmem2/devmem2/0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch
new file mode 100644
index 0000000000..2a57f29891
--- /dev/null
+++ b/meta-oe/recipes-support/devmem2/devmem2/0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch
@@ -0,0 +1,70 @@
+From 1360a907879dd24041797a3b709d49aeac2ab444 Mon Sep 17 00:00:00 2001
+From: Denys Dmytriyenko <denys@ti.com>
+Date: Tue, 29 May 2018 16:55:42 -0400
+Subject: [PATCH] devmem.c: ensure word is 32-bit and add support for 64-bit
+ long
+
+Signed-off-by: Denys Dmytriyenko <denys@ti.com>
+---
+ devmem2.c | 23 +++++++++++++++++------
+ 1 file changed, 17 insertions(+), 6 deletions(-)
+
+diff --git a/devmem2.c b/devmem2.c
+index 5845381..68131b2 100644
+--- a/devmem2.c
++++ b/devmem2.c
+@@ -39,6 +39,7 @@
+ 
+ #include <stdio.h>
+ #include <stdlib.h>
++#include <stdint.h>
+ #include <unistd.h>
+ #include <string.h>
+ #include <errno.h>
+@@ -69,7 +70,7 @@ int main(int argc, char **argv) {
+        if(argc < 2) {
+                fprintf(stderr, "\nUsage:\t%s { address } [ type [ data ] ]\n"
+                        "\taddress : memory address to act upon\n"
+-                       "\ttype    : access operation type : [b]yte, [h]alfword, [w]ord\n"
++                       "\ttype    : access operation type : [b]yte, [h]alfword, [w]ord, [l]ong\n"
+                        "\tdata    : data to be written\n\n",
+                        argv[0]);
+                exit(1);
+@@ -103,9 +104,14 @@ int main(int argc, char **argv) {
+                        read_result = *((unsigned short *) virt_addr);
+                        break;
+                case 'w':
+-                       data_size = sizeof(unsigned long);
++                       data_size = sizeof(uint32_t);
+                        virt_addr = fixup_addr(virt_addr, data_size);
+-                       read_result = *((unsigned long *) virt_addr);
++                       read_result = *((uint32_t *) virt_addr);
++                       break;
++               case 'l':
++                       data_size = sizeof(uint64_t);
++                       virt_addr = fixup_addr(virt_addr, data_size);
++                       read_result = *((uint64_t *) virt_addr);
+                        break;
+                default:
+                        fprintf(stderr, "Illegal data type '%c'.\n", access_type);
+@@ -129,9 +135,14 @@ int main(int argc, char **argv) {
+                                read_result = *((unsigned short *) virt_addr);
+                                break;
+                        case 'w':
+-                               virt_addr = fixup_addr(virt_addr, sizeof(unsigned long));
+-                               *((unsigned long *) virt_addr) = write_val;
+-                               read_result = *((unsigned long *) virt_addr);
++                               virt_addr = fixup_addr(virt_addr, sizeof(uint32_t));
++                               *((uint32_t *) virt_addr) = write_val;
++                               read_result = *((uint32_t *) virt_addr);
++                               break;
++                       case 'l':
++                               virt_addr = fixup_addr(virt_addr, sizeof(uint64_t));
++                               *((uint64_t *) virt_addr) = write_val;
++                               read_result = *((uint64_t *) virt_addr);
+                                break;
+                }
+                sprintf(fmt_str, "Write at address 0x%%08lX (%%p): 0x%%0%dlX, "
+-- 
+2.7.4
+