+/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef _LINUX_LMB_H
#define _LINUX_LMB_H
#ifdef __KERNEL__
-#ifdef CONFIG_LMB
#include <asm/types.h>
+#include <asm/u-boot.h>
+
/*
* Logical memory blocks.
*
* Copyright (C) 2001 Peter Bergner, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
-#define MAX_LMB_REGIONS 8
+/**
+ * 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
+ */
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;
- phys_size_t size;
- struct lmb_property region[MAX_LMB_REGIONS+1];
+ 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;
+#if !IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS)
+ struct lmb_property memory_regions[CONFIG_LMB_MEMORY_REGIONS];
+ struct lmb_property reserved_regions[CONFIG_LMB_RESERVED_REGIONS];
+#endif
};
-extern struct lmb lmb;
-
extern void lmb_init(struct lmb *lmb);
+extern void lmb_init_and_reserve(struct lmb *lmb, struct bd_info *bd,
+ void *fdt_blob);
+extern void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base,
+ phys_size_t size, void *fdt_blob);
extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
extern 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);
extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
phys_addr_t max_addr);
extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
phys_addr_t max_addr);
+extern phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
+ phys_size_t size);
+extern phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr);
extern 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 0 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);
extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
extern void lmb_dump_all(struct lmb *lmb);
+extern void lmb_dump_all_force(struct lmb *lmb);
static inline phys_size_t
lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
void board_lmb_reserve(struct lmb *lmb);
void arch_lmb_reserve(struct lmb *lmb);
-#endif /* CONFIG_LMB */
+/* Low level functions */
+
+static inline bool lmb_is_nomap(struct lmb_property *m)
+{
+ return m->flags & LMB_NOMAP;
+}
+
#endif /* __KERNEL__ */
#endif /* _LINUX_LMB_H */