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devmem2: import from OE rev d4f0211e2078d5033ae0dee74664de5520d8392d

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Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
This commit is contained in:
Martin Jansa
2011-05-29 21:49:19 +02:00
committed by Koen Kooi
parent 9ebce78b17
commit 7974647f5e
2 changed files with 113 additions and 0 deletions
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meta-oe/recipes-support/devmem2/devmem2.bb
+22
View File
@@ -0,0 +1,22 @@
DESCRIPTION = "Simple program to read/write from/to any location in memory."
LICENSE = "GPLv2+"
LIC_FILES_CHKSUM = "file://devmem2.c;endline=28;md5=dd68f2b0a5184b3db3dc25c99e0bd0cd"
PR = "r7"
SRC_URI = "http://www.lartmaker.nl/lartware/port/devmem2.c \
file://devmem2-fixups-2.patch;apply=yes;striplevel=0"
S = "${WORKDIR}"
CFLAGS += "-DFORCE_STRICT_ALIGNMENT"
do_compile() {
${CC} -o devmem2 devmem2.c ${CFLAGS} ${LDFLAGS}
}
do_install() {
install -d ${D}${bindir}
install devmem2 ${D}${bindir}
}
SRC_URI[md5sum] = "be12c0132a1ae118cbf5e79d98427c1d"
SRC_URI[sha256sum] = "ec382c90af3ef2f49695ff14a4d6521e58ac482c4e29d6c9ebca8768f699c191"
meta-oe/recipes-support/devmem2/devmem2/devmem2-fixups-2.patch
+91
View File
@@ -0,0 +1,91 @@
--- devmem2.c 2004-08-05 01:55:25.000000000 +0200
+++ devmem2_modif.c 2011-01-13 15:48:37.798799784 +0100
@@ -45,12 +45,16 @@
#define MAP_SIZE 4096UL
#define MAP_MASK (MAP_SIZE - 1)
+static inline void *fixup_addr(void *addr, size_t size);
+
int main(int argc, char **argv) {
int fd;
void *map_base, *virt_addr;
- unsigned long read_result, writeval;
+ unsigned long read_result, write_val;
off_t target;
int access_type = 'w';
+ char fmt_str[128];
+ size_t data_size;
if(argc < 2) {
fprintf(stderr, "\nUsage:\t%s { address } [ type [ data ] ]\n"
@@ -79,38 +83,51 @@
virt_addr = map_base + (target & MAP_MASK);
switch(access_type) {
case 'b':
+ data_size = sizeof(unsigned char);
+ virt_addr = fixup_addr(virt_addr, data_size);
read_result = *((unsigned char *) virt_addr);
break;
case 'h':
+ data_size = sizeof(unsigned short);
+ virt_addr = fixup_addr(virt_addr, data_size);
read_result = *((unsigned short *) virt_addr);
break;
case 'w':
+ data_size = sizeof(unsigned long);
+ virt_addr = fixup_addr(virt_addr, data_size);
read_result = *((unsigned long *) virt_addr);
break;
default:
fprintf(stderr, "Illegal data type '%c'.\n", access_type);
exit(2);
}
- printf("Value at address 0x%X (%p): 0x%X\n", target, virt_addr, read_result);
+ sprintf(fmt_str, "Read at address 0x%%08lX (%%p): 0x%%0%dlX\n", 2*data_size);
+ printf(fmt_str, (unsigned long)target, virt_addr, read_result);
fflush(stdout);
if(argc > 3) {
- writeval = strtoul(argv[3], 0, 0);
+ write_val = strtoul(argv[3], 0, 0);
switch(access_type) {
case 'b':
- *((unsigned char *) virt_addr) = writeval;
+ virt_addr = fixup_addr(virt_addr, sizeof(unsigned char));
+ *((unsigned char *) virt_addr) = write_val;
read_result = *((unsigned char *) virt_addr);
break;
case 'h':
- *((unsigned short *) virt_addr) = writeval;
+ virt_addr = fixup_addr(virt_addr, sizeof(unsigned short));
+ *((unsigned short *) virt_addr) = write_val;
read_result = *((unsigned short *) virt_addr);
break;
case 'w':
- *((unsigned long *) virt_addr) = writeval;
+ virt_addr = fixup_addr(virt_addr, sizeof(unsigned long));
+ *((unsigned long *) virt_addr) = write_val;
read_result = *((unsigned long *) virt_addr);
break;
}
- printf("Written 0x%X; readback 0x%X\n", writeval, read_result);
+ sprintf(fmt_str, "Write at address 0x%%08lX (%%p): 0x%%0%dlX, "
+ "readback 0x%%0%dlX\n", 2*data_size, 2*data_size);
+ printf(fmt_str, (unsigned long)target, virt_addr,
+ write_val, read_result);
fflush(stdout);
}
@@ -119,3 +136,12 @@
return 0;
}
+static inline void *fixup_addr(void *addr, size_t size)
+{
+#ifdef FORCE_STRICT_ALIGNMENT
+ unsigned long aligned_addr = (unsigned long)addr;
+ aligned_addr &= ~(size - 1);
+ addr = (void *)aligned_addr;
+#endif
+ return addr;
+}