initial test commit of devmem2 utility

4 files changed, 159 insertions, 0 deletions

diff --git a/dev-util/devmem2/Manifest b/dev-util/devmem2/Manifest
new file mode 100644
index 0000000..f4a19e5
--- /dev/null
+++ b/dev-util/devmem2/Manifest
@@ -0,0 +1,3 @@
+AUX Makefile 72 SHA256 e550bd019879bec56592cf44d967f7bda3abd8f75687694a7cc9d9cb8208d02d SHA512 b2b42ae47c9f0724309bce4e4aff611b650f746d17984b131554068e6bcabe67e7c92d885d0cc55034b46ba476e37b4fb3b338a3a3f7c7e3ccef539185db427f WHIRLPOOL 06fbadd1ea7b363d124454ccffe6086ed336b79d66fcdaa62accecde8ac753bce2f4588d3dd9af446261d414363bd119bfeb1552836a033bf94ceaa581f2571b
+AUX devmem2.c 3551 SHA256 ec382c90af3ef2f49695ff14a4d6521e58ac482c4e29d6c9ebca8768f699c191 SHA512 e3e46203492a1b4c9a292f59b2d998e79fd40dd82b5b8c99ce52af466819e34b3ccc3234b726560264a744716955fe24d69685760ae431fefef87237b4e5f83d WHIRLPOOL 38e964718116bd52d1ca9e3af950b9730dbcc36e078572c6d32d41cb4ccaa69a9212bae47ebd9a85b6a33216dc229e5d3810f38dda86f4da8e7f6021a08c996a
+EBUILD devmem2-20040805.ebuild 566 SHA256 386ec90bd495d490f1ac562b056dc6f7899bb11af681d7322dd06f81b30df125 SHA512 7ffe3138b80ad6e61723ea47ce0274bc8244fdfd3a274cbd228946ad0baa6832338b25be7e751fe18c2fdcca12b1c7cb0c5ae7f1d2ea04f00aad111943b1e80d WHIRLPOOL 16e89f9d540c307b75ff9a43cd085b430782522985bfa7015bedfc0f296b1d33c43882b656d4802e14cf5c389dd8a7a574195b7689ea8a2fe80c684499575070
diff --git a/dev-util/devmem2/devmem2-20040805.ebuild b/dev-util/devmem2/devmem2-20040805.ebuild
new file mode 100644
index 0000000..31d0f42
--- /dev/null
+++ b/dev-util/devmem2/devmem2-20040805.ebuild
@@ -0,0 +1,31 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+inherit toolchain-funcs
+
+DESCRIPTION="Simple program to read/write from/to any location in memory."
+HOMEPAGE="http://www.lartmaker.nl/lartware/port/"
+
+KEYWORDS="~arm"
+
+SLOT="0"
+LICENSE="GPL-2"
+IUSE=""
+
+DEPEND=""
+
+S="${WORKDIR}"
+
+src_unpack() {
+	cp "${FILESDIR}"/Makefile "${FILESDIR}"/devmem2.c "${S}"/
+}
+
+src_compile() {
+	emake CC=$(tc-getCC) || die "make failed..."
+}
+
+src_install() {
+	dobin "${WORKDIR}/devmem2" || die "install failed..."
+}
+
diff --git a/dev-util/devmem2/files/Makefile b/dev-util/devmem2/files/Makefile
new file mode 100644
index 0000000..bdcac70
--- /dev/null
+++ b/dev-util/devmem2/files/Makefile
@@ -0,0 +1,4 @@
+SRC=devmem2.c
+
+devmem2: $(SRC)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(SRC)
diff --git a/dev-util/devmem2/files/devmem2.c b/dev-util/devmem2/files/devmem2.c
new file mode 100644
index 0000000..9bcb79d
--- /dev/null
+++ b/dev-util/devmem2/files/devmem2.c
@@ -0,0 +1,121 @@
+/*
+ * devmem2.c: Simple program to read/write from/to any location in memory.
+ *
+ *  Copyright (C) 2000, Jan-Derk Bakker (jdb@lartmaker.nl)
+ *
+ *
+ * This software has been developed for the LART computing board
+ * (http://www.lart.tudelft.nl/). The development has been sponsored by
+ * the Mobile MultiMedia Communications (http://www.mmc.tudelft.nl/)
+ * and Ubiquitous Communications (http://www.ubicom.tudelft.nl/)
+ * projects.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#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("Value at address 0x%X (%p): 0x%X\n", target, virt_addr, 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;
+}
+