1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * drmem.h: Power specific logical memory block representation
5 * Copyright 2017 IBM Corporation
8 #ifndef _ASM_POWERPC_LMB_H
9 #define _ASM_POWERPC_LMB_H
16 #ifdef CONFIG_MEMORY_HOTPLUG
21 struct drmem_lmb_info {
22 struct drmem_lmb *lmbs;
27 extern struct drmem_lmb_info *drmem_info;
29 #define for_each_drmem_lmb_in_range(lmb, start, end) \
30 for ((lmb) = (start); (lmb) < (end); (lmb)++)
32 #define for_each_drmem_lmb(lmb) \
33 for_each_drmem_lmb_in_range((lmb), \
34 &drmem_info->lmbs[0], \
35 &drmem_info->lmbs[drmem_info->n_lmbs])
38 * The of_drconf_cell_v1 struct defines the layout of the LMB data
39 * specified in the ibm,dynamic-memory device tree property.
40 * The property itself is a 32-bit value specifying the number of
41 * LMBs followed by an array of of_drconf_cell_v1 entries, one
44 struct of_drconf_cell_v1 {
53 * Version 2 of the ibm,dynamic-memory property is defined as a
54 * 32-bit value specifying the number of LMB sets followed by an
55 * array of of_drconf_cell_v2 entries, one per LMB set.
57 struct of_drconf_cell_v2 {
65 #define DRCONF_MEM_ASSIGNED 0x00000008
66 #define DRCONF_MEM_AI_INVALID 0x00000040
67 #define DRCONF_MEM_RESERVED 0x00000080
68 #define DRCONF_MEM_HOTREMOVABLE 0x00000100
70 static inline u32 drmem_lmb_size(void)
72 return drmem_info->lmb_size;
75 #define DRMEM_LMB_RESERVED 0x80000000
77 static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb)
79 lmb->flags |= DRMEM_LMB_RESERVED;
82 static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb)
84 lmb->flags &= ~DRMEM_LMB_RESERVED;
87 static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb)
89 return lmb->flags & DRMEM_LMB_RESERVED;
92 u64 drmem_lmb_memory_max(void);
93 void __init walk_drmem_lmbs(struct device_node *dn,
94 void (*func)(struct drmem_lmb *, const __be32 **));
95 int drmem_update_dt(void);
97 #ifdef CONFIG_PPC_PSERIES
98 void __init walk_drmem_lmbs_early(unsigned long node,
99 void (*func)(struct drmem_lmb *, const __be32 **));
102 static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb)
104 lmb->aa_index = 0xffffffff;
107 #ifdef CONFIG_MEMORY_HOTPLUG
108 static inline void lmb_set_nid(struct drmem_lmb *lmb)
110 lmb->nid = memory_add_physaddr_to_nid(lmb->base_addr);
112 static inline void lmb_clear_nid(struct drmem_lmb *lmb)
117 static inline void lmb_set_nid(struct drmem_lmb *lmb)
120 static inline void lmb_clear_nid(struct drmem_lmb *lmb)
125 #endif /* _ASM_POWERPC_LMB_H */