main: Attempt to automatically discover target

Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Alistair Popple <alistair@popple.id.au>

1 files changed, 92 insertions, 0 deletions

diff --git a/src/options_ppc.c b/src/options_ppc.c
new file mode 100644
index 0000000..30ed5bb
--- /dev/null
+++ b/src/options_ppc.c
@@ -0,0 +1,92 @@
+/* Copyright 2017 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * 	http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "main.h"
+
+static const char p8[] = "p8";
+static const char p9[] = "p9";
+
+enum backend default_backend(void)
+{
+	return HOST;
+}
+
+bool backend_is_possible(enum backend backend)
+{
+	/* TODO */
+	return backend == HOST;
+}
+
+void print_backends(FILE *stream)
+{
+	fprintf(stream, "HOST");
+}
+
+const char *default_target(enum backend backend)
+{
+	const char *pos = NULL;
+	char line[256];
+	FILE *cpuinfo;
+
+	cpuinfo = fopen("/proc/cpuinfo", "r");
+	if (!cpuinfo)
+		return NULL;
+
+	while ((pos = fgets(line, sizeof(line), cpuinfo)))
+		if (strncmp(line, "cpu", 3) == 0)
+			break;
+	fclose(cpuinfo);
+
+	if (!pos) /* Got to EOF without a break */
+		return NULL;
+
+	pos = strchr(line, ':');
+	if (!pos)
+		return NULL;
+
+	if (*(pos + 1) == '\0')
+		return NULL;
+	pos += 2;
+
+	if (strncmp(pos, "POWER8", 6) == 0)
+		return p8;
+
+	if (strncmp(pos, "POWER9", 6) == 0)
+		return p9;
+
+	return NULL;
+}
+
+void print_targets(FILE *stream)
+{
+	fprintf(stream, "HOST: p8 p9\n");
+}
+
+bool target_is_possible(enum backend backend, const char *target)
+{
+	const char *def;
+
+	if (!backend_is_possible(backend))
+		return false;
+
+	def = default_target(backend);
+	if (!def || !target)
+		return false;
+
+	return strcmp(def, target) == 0;
+}