[6/6] ti/mem_util: new developer tool to dbg entire mem incl cpu regs.

Submitted by Kim B√łndergaard on Aug. 29, 2014, 12:30 p.m.

Details

Message ID 84c79cdb83ccdff7014f94b75f124ffb870c1240.1409312414.git.kibo@prevas.dk
State Under Review
Delegated to: Kim
Headers show

Commit Message

Kim B√łndergaard Aug. 29, 2014, 12:30 p.m.
From: Jacob Kjaergaard <jacob.kjaergaard@prevas.dk>

---
 recipes/ti/files/mem_util.c | 131 ++++++++++++++++++++++++++++++++++++++++++++
 recipes/ti/mem-util.oe      |  26 +++++++++
 2 files changed, 157 insertions(+)
 create mode 100755 recipes/ti/files/mem_util.c
 create mode 100644 recipes/ti/mem-util.oe

Patch hide | download patch | download mbox

diff --git a/recipes/ti/files/mem_util.c b/recipes/ti/files/mem_util.c
new file mode 100755
index 0000000..33639b6
--- /dev/null
+++ b/recipes/ti/files/mem_util.c
@@ -0,0 +1,131 @@ 
+/*
+ * Module: mem_util.c
+ *
+ * Description: This program is used to read/write from/to any location in memory.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *    Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ *    Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the
+ *    distribution.
+ *
+ *    Neither the name of Texas Instruments Incorporated nor the names of
+ *    its contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <termios.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+
+#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)
+
+int main(int argc, char **argv) {
+    int fd;
+    void *map_base, *virt_addr;
+	unsigned long read_result, writeval;
+	off_t target;
+	int access_type = 'w';
+
+	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"
+			"\tdata    : data to be written\n\n",
+			argv[0]);
+		exit(1);
+	}
+	target = strtoul(argv[1], 0, 0);
+
+	if(argc > 2)
+		access_type = tolower(argv[2][0]);
+
+
+    if((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1) FATAL;
+    //printf("/dev/mem opened.\n");
+    fflush(stdout);
+
+    /* Map one page */
+    map_base = mmap(0, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, target & ~MAP_MASK);
+    if(map_base == (void *) -1) FATAL;
+    //printf("Memory mapped at address %p.\n", map_base);
+    fflush(stdout);
+
+    virt_addr = map_base + (target & MAP_MASK);
+    switch(access_type) {
+		case 'b':
+			read_result = *((unsigned char *) virt_addr);
+			break;
+		case 'h':
+			read_result = *((unsigned short *) virt_addr);
+			break;
+		case 'w':
+			read_result = *((unsigned long *) virt_addr);
+			break;
+		default:
+			fprintf(stderr, "Illegal data type '%c'.\n", access_type);
+			exit(2);
+	}
+    printf("%X\n", read_result);
+    fflush(stdout);
+
+	if(argc > 3) {
+		writeval = strtoul(argv[3], 0, 0);
+		switch(access_type) {
+			case 'b':
+				*((unsigned char *) virt_addr) = writeval;
+				read_result = *((unsigned char *) virt_addr);
+				break;
+			case 'h':
+				*((unsigned short *) virt_addr) = writeval;
+				read_result = *((unsigned short *) virt_addr);
+				break;
+			case 'w':
+				*((unsigned long *) virt_addr) = writeval;
+				read_result = *((unsigned long *) virt_addr);
+				break;
+		}
+		printf("Written 0x%X; readback 0x%X\n", writeval, read_result);
+		fflush(stdout);
+	}
+
+	if(munmap(map_base, MAP_SIZE) == -1) FATAL;
+    close(fd);
+    return 0;
+}
+
diff --git a/recipes/ti/mem-util.oe b/recipes/ti/mem-util.oe
new file mode 100644
index 0000000..46709cf
--- /dev/null
+++ b/recipes/ti/mem-util.oe
@@ -0,0 +1,26 @@ 
+DESCRIPTION = "his program is used to read/write from/to any location in memory."
+
+SECTION = "Memory util"
+
+LICENSE = "TI"
+
+SRC_URI += " file://mem_util.c"
+
+S= "${SRCDIR}"
+
+do_compile() {
+
+    ${CC} ${CFLAGS} ${LDFLAGS} mem_util.c -o mem_util
+
+}
+
+do_install(){
+
+    install -d ${D}${bindir}
+    install -m 0755 mem_util ${D}${bindir}
+
+}
+
+RDEPENDS_${PN} += "libc"
+
+inherit c