1 files changed, 77 insertions, 0 deletions
diff --git a/roms/skiboot/include/mem_region.h b/roms/skiboot/include/mem_region.h
new file mode 100644
index 000000000..3e3818a66
--- /dev/null
+++ b/roms/skiboot/include/mem_region.h
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+/* Copyright 2013-2018 IBM Corp. */
+
+#ifndef __MEMORY_REGION
+#define __MEMORY_REGION
+#include <ccan/list/list.h>
+#include <stdint.h>
+
+#include <lock.h>
+
+enum mem_region_type {
+	/* ranges allocatable by mem_alloc: this will be most of memory */
+	REGION_SKIBOOT_HEAP,
+
+	/* ranges allocatable by mem_alloc but shrunk (e.g. whole memory) */
+	REGION_MEMORY,
+
+	/* ranges used explicitly for skiboot, but not allocatable. eg .text */
+	REGION_SKIBOOT_FIRMWARE,
+
+	/* ranges reserved before skiboot init, eg HBRT memory */
+	REGION_FW_RESERVED,
+
+	/* ranges reserved, 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 *node;
+	enum mem_region_type type;
+	struct list_head free_list;
+	struct lock free_list_lock;
+};
+
+extern struct lock mem_region_lock;
+extern unsigned long top_of_ram;
+
+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_allocated_size(const void *ptr);
+bool mem_check(const struct mem_region *region);
+bool mem_check_all(void);
+void mem_region_release_unused(void);
+void start_mem_region_clear_unused(void);
+void wait_mem_region_clear_unused(void);
+int64_t mem_dump_free(void);
+void mem_dump_allocs(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_fw(const char *name, uint64_t start, uint64_t len);
+void mem_reserve_hwbuf(const char *name, uint64_t start, uint64_t len);
+
+struct mem_region *find_mem_region(const char *name);
+
+bool mem_range_is_reserved(uint64_t start, uint64_t size);
+
+/* Read-only memory checksum */
+bool verify_romem(void);
+
+#endif /* __MEMORY_REGION */