Add devmem2 backend

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/memory_devmem2.c b/memory_devmem2.c
new file mode 100644
index 0000000..ac25fc2
--- /dev/null
+++ b/memory_devmem2.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2021 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include "devmem2.h"
+#include "memory.h"
+
+int init_memory_mapping(int debug, struct memory_mapping **memory_mapping_pp)
+{
+	return 0;
+}
+
+int read_word(int debug, struct memory_mapping *memory_mapping,
+	      off_t addr, unsigned long *result)
+{
+	int rc;
+
+	rc = devmem2(debug, addr, 'w', result, NULL);
+	if (rc)
+		printf("%s: devmem2 failed with error %d\n", __func__, rc);
+
+	return rc;
+}