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6d66502bc7
Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS
to change independently the max number of the regions in lmb
library.
When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to
struct lmb and manage the array size with the element 'max' of struct
lmb_region; their are still allocated in stack.
When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in
struct lmb_region to allow compiler optimization.
Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in
bootm when the number of reserved regions (not adjacent) is reached:
+ 1 region for relocated U-Boot
+ 1 region for initrd
+ 1 region for relocated linux device tree
+ reserved memory regions present in Linux device tree.
The current limit of 8 regions is reached with only 5 reserved regions
in DT.
see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays
to static storage in memblock.c and make their size a variable")
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef _LINUX_LMB_H
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#define _LINUX_LMB_H
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#ifdef __KERNEL__
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#include <asm/types.h>
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#include <asm/u-boot.h>
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/*
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* Logical memory blocks.
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*
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* Copyright (C) 2001 Peter Bergner, IBM Corp.
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*/
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/**
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* struct lmb_property - Description of one region.
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*
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* @base: Base address of the region.
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* @size: Size of the region
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*/
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struct lmb_property {
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phys_addr_t base;
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phys_size_t size;
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};
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/**
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* struct lmb_region - Description of a set of region.
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*
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* @cnt: Number of regions.
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* @max: Size of the region array, max value of cnt.
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* @region: Array of the region properties
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*/
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struct lmb_region {
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unsigned long cnt;
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unsigned long max;
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#if IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS)
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struct lmb_property region[CONFIG_LMB_MAX_REGIONS];
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#else
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struct lmb_property *region;
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#endif
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};
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/**
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* struct lmb - Logical memory block handle.
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*
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* Clients provide storage for Logical memory block (lmb) handles.
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* The content of the structure is managed by the lmb library.
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* A lmb struct is initialized by lmb_init() functions.
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* The lmb struct is passed to all other lmb APIs.
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*
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* @memory: Description of memory regions.
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* @reserved: Description of reserved regions.
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* @memory_regions: Array of the memory regions (statically allocated)
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* @reserved_regions: Array of the reserved regions (statically allocated)
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*/
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struct lmb {
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struct lmb_region memory;
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struct lmb_region reserved;
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#if !IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS)
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struct lmb_property memory_regions[CONFIG_LMB_MEMORY_REGIONS];
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struct lmb_property reserved_regions[CONFIG_LMB_RESERVED_REGIONS];
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#endif
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};
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extern void lmb_init(struct lmb *lmb);
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extern void lmb_init_and_reserve(struct lmb *lmb, struct bd_info *bd,
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void *fdt_blob);
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extern void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base,
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phys_size_t size, void *fdt_blob);
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extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
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extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
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extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
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extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
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phys_addr_t max_addr);
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extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
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phys_addr_t max_addr);
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extern phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
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phys_size_t size);
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extern phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr);
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extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
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extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
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extern void lmb_dump_all(struct lmb *lmb);
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extern void lmb_dump_all_force(struct lmb *lmb);
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static inline phys_size_t
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lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
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{
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return type->region[region_nr].size;
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}
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void board_lmb_reserve(struct lmb *lmb);
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void arch_lmb_reserve(struct lmb *lmb);
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#endif /* __KERNEL__ */
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#endif /* _LINUX_LMB_H */
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