libpdbg: Add a more complete fake backend

The fake backend we had couldn't be used as src/main.c was missing the option to
enable it. It was also missing an implementation of a fake pib so add that too.

Signed-off-by: Alistair Popple <alistair@popple.id.au>

5 files changed, 75 insertions, 39 deletions

diff --git a/Makefile.am b/Makefile.am
index 9b1ccd9..c96203d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -33,7 +33,7 @@ libfdt_la_SOURCES = \
 
 libpdbg_la_SOURCES = \
 	libpdbg/kernel.c \
-	libpdbg/fakepib.c \
+	libpdbg/fake.c \
 	libpdbg/chip.c \
 	libpdbg/p8chip.c \
 	libpdbg/p9chip.c \
diff --git a/fake.dts b/fake.dts
index e6dd958..f647491 100644
--- a/fake.dts
+++ b/fake.dts
@@ -12,5 +12,11 @@
 
 		index = <0x0>;
 		status = "hidden";
+
+		pib@0 {
+		      compatible = "ibm,fake-pib";
+		      reg = <0x0 0x0 0x0>;
+		      index = <0x0>;
+		};
 	};
 };
diff --git a/libpdbg/fake.c b/libpdbg/fake.c
new file mode 100644
index 0000000..5e5571c
--- /dev/null
+++ b/libpdbg/fake.c
@@ -0,0 +1,66 @@
+/* copyright 2016 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 "operations.h"
+#include <stdio.h>
+#include <inttypes.h>
+
+static int fake_fsi_read(struct fsi *fsi, uint32_t addr, uint32_t *value)
+{
+	*value = 0xfeed0cfa;
+	printf("fake_fsi_read(0x%04" PRIx32 ", 0x%04" PRIx32 ")\n", addr, *value);
+	return 0;
+}
+
+static int fake_fsi_write(struct fsi *fsi, uint32_t addr, uint32_t value)
+{
+	printf("fake_fsi_write(0x%04" PRIx32 ", 0x%04" PRIx32 ")\n", addr, value);
+	return 0;
+}
+
+struct fsi fake_fsi = {
+	.target = {
+		.name =	"Fake FSI",
+		.compatible = "ibm,fake-fsi",
+		.class = "fsi",
+	},
+	.read = fake_fsi_read,
+	.write = fake_fsi_write,
+};
+DECLARE_HW_UNIT(fake_fsi);
+
+static int fake_pib_read(struct pib *pib, uint64_t addr, uint64_t *value)
+{
+	*value = 0xdeadbeef;
+	printf("fake_pib_read(0x%08" PRIx64 ", 0x%08" PRIx64 ")\n", addr, *value);
+	return 0;
+}
+
+static int fake_pib_write(struct pib *pib, uint64_t addr, uint64_t value)
+{
+	printf("fake_pib_write(0x%08" PRIx64 ", 0x%08" PRIx64 ")\n", addr, value);
+	return 0;
+}
+
+struct pib fake_pib = {
+	.target = {
+		.name =	"Fake PIB",
+		.compatible = "ibm,fake-pib",
+		.class = "pib",
+	},
+	.read = fake_pib_read,
+	.write = fake_pib_write,
+};
+DECLARE_HW_UNIT(fake_pib);
diff --git a/libpdbg/fakepib.c b/libpdbg/fakepib.c
deleted file mode 100644
index 22ea3e7..0000000
--- a/libpdbg/fakepib.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/* Copyright 2016 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 "operations.h"
-
-static int fake_read(struct pib *pib, uint64_t addr, uint64_t *value)
-{
-	*value = 0xdeadbeef;
-	return 0;
-}
-
-static int fake_write(struct pib *pib, uint64_t addr, uint64_t value)
-{
-	return 0;
-}
-
-struct pib fake_pib = {
-	.target = {
-		.name =	"Fake PIB",
-		.compatible = "ibm,fake-fsi",
-		.class = "fsi",
-	},
-	.read = fake_read,
-	.write = fake_write,
-};
-DECLARE_HW_UNIT(fake_pib);
diff --git a/src/main.c b/src/main.c
index 67b4055..7517cf2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -286,6 +286,8 @@ static bool parse_options(int argc, char *argv[])
 				backend = KERNEL;
 				/* TODO: use device node to point at a slave
 				 * other than the first? */
+			} else if (strcmp(optarg, "fake") == 0) {
+				backend = FAKE;
 			} else
 				opt_error = true;
 			break;