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/* 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;
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);
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 */
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