Initial commit of Open Source release

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/include/mem_region.h b/include/mem_region.h
new file mode 100644
index 0000000..b2547e5
--- /dev/null
+++ b/include/mem_region.h
@@ -0,0 +1,69 @@
+/* Copyright 2013-2014 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.
+ */
+
+#ifndef __MEMORY_REGION
+#define __MEMORY_REGION
+#include <ccan/list/list.h>
+#include <stdint.h>
+
+enum mem_region_type {
+	/* ranges allocatable by mem_alloc: this will be most of memory */
+	REGION_SKIBOOT_HEAP,
+
+	/* ranges used explicitly for skiboot, but not allocatable. eg .text */
+	REGION_SKIBOOT_FIRMWARE,
+
+	/* ranges reserved, possibly before skiboot init, eg HW framebuffer */
+	REGION_RESERVED,
+
+	/* ranges available for the OS, created by mem_region_release_unused */
+	REGION_OS,
+};
+
+/* An area of physical memory. */
+struct mem_region {
+	struct list_node list;
+	const char *name;
+	uint64_t start, len;
+	struct dt_node *mem_node;
+	enum mem_region_type type;
+	struct list_head free_list;
+};
+
+extern struct lock mem_region_lock;
+void *mem_alloc(struct mem_region *region, size_t size, size_t align,
+		const char *location);
+void mem_free(struct mem_region *region, void *mem,
+	      const char *location);
+bool mem_resize(struct mem_region *region, void *mem, size_t len,
+		const char *location);
+size_t mem_size(const struct mem_region *region, const void *ptr);
+bool mem_check(const struct mem_region *region);
+void mem_region_release_unused(void);
+
+/* Specifically for working on the heap. */
+extern struct mem_region skiboot_heap;
+
+void mem_region_init(void);
+
+void mem_region_add_dt_reserved(void);
+
+/* Mark memory as reserved */
+void mem_reserve(const char *name, uint64_t start, uint64_t len);
+
+struct mem_region *find_mem_region(const char *name);
+
+#endif /* __MEMORY_REGION */