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/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef _LINUX_LMB_H
#define _LINUX_LMB_H
#ifdef __KERNEL__
#include <asm/types.h>
#include <asm/u-boot.h>
/*
* Logical memory blocks.
*
* Copyright (C) 2001 Peter Bergner, IBM Corp.
*/
/**
* enum lmb_flags - definition of memory region attributes
* @LMB_NONE: no special request
* @LMB_NOMAP: don't add to mmu configuration
*/
enum lmb_flags {
LMB_NONE = 0x0,
LMB_NOMAP = 0x4,
};
/**
* struct lmb_property - Description of one region.
*
* @base: Base address of the region.
* @size: Size of the region
* @flags: memory region attributes
*/
struct lmb_property {
phys_addr_t base;
phys_size_t size;
enum lmb_flags flags;
};
/**
* struct lmb_region - Description of a set of region.
*
* @cnt: Number of regions.
* @max: Size of the region array, max value of cnt.
* @region: Array of the region properties
*/
struct lmb_region {
unsigned long cnt;
unsigned long max;
#if IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS)
struct lmb_property region[CONFIG_LMB_MAX_REGIONS];
#else
struct lmb_property *region;
#endif
};
/**
* struct lmb - Logical memory block handle.
*
* Clients provide storage for Logical memory block (lmb) handles.
* The content of the structure is managed by the lmb library.
* A lmb struct is initialized by lmb_init() functions.
* The lmb struct is passed to all other lmb APIs.
*
* @memory: Description of memory regions.
* @reserved: Description of reserved regions.
* @memory_regions: Array of the memory regions (statically allocated)
* @reserved_regions: Array of the reserved regions (statically allocated)
*/
struct lmb {
struct lmb_region memory;
struct lmb_region reserved;
#ifdef CONFIG_LMB_MEMORY_REGIONS
struct lmb_property memory_regions[CONFIG_LMB_MEMORY_REGIONS];
struct lmb_property reserved_regions[CONFIG_LMB_RESERVED_REGIONS];
#endif
};
void lmb_init(struct lmb *lmb);
void lmb_init_and_reserve(struct lmb *lmb, struct bd_info *bd, void *fdt_blob);
void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base,
phys_size_t size, void *fdt_blob);
long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
/**
* lmb_reserve_flags - Reserve one region with a specific flags bitfield.
*
* @lmb: the logical memory block struct
* @base: base address of the memory region
* @size: size of the memory region
* @flags: flags for the memory region
* Return: 0 if OK, > 0 for coalesced region or a negative error code.
*/
long lmb_reserve_flags(struct lmb *lmb, phys_addr_t base,
phys_size_t size, enum lmb_flags flags);
phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
phys_addr_t max_addr);
phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
phys_addr_t max_addr);
phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base, phys_size_t size);
phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr);
int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
/**
* lmb_is_reserved_flags - test if tha address is in reserved region with a bitfield flag
*
* @lmb: the logical memory block struct
* @addr: address to be tested
* @flags: flags bitfied to be tested
* Return: if not reserved or reserved without the requested flag else 1
*/
int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags);
long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
void lmb_dump_all(struct lmb *lmb);
void lmb_dump_all_force(struct lmb *lmb);
void board_lmb_reserve(struct lmb *lmb);
void arch_lmb_reserve(struct lmb *lmb);
void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align);
#endif /* __KERNEL__ */
#endif /* _LINUX_LMB_H */
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