1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * drmem.h: Power specific logical memory block representation 4 * 5 * Copyright 2017 IBM Corporation 6 */ 7 8 #ifndef _ASM_POWERPC_LMB_H 9 #define _ASM_POWERPC_LMB_H 10 11 struct drmem_lmb { 12 u64 base_addr; 13 u32 drc_index; 14 u32 aa_index; 15 u32 flags; 16 #ifdef CONFIG_MEMORY_HOTPLUG 17 int nid; 18 #endif 19 }; 20 21 struct drmem_lmb_info { 22 struct drmem_lmb *lmbs; 23 int n_lmbs; 24 u32 lmb_size; 25 }; 26 27 extern struct drmem_lmb_info *drmem_info; 28 29 #define for_each_drmem_lmb_in_range(lmb, start, end) \ 30 for ((lmb) = (start); (lmb) < (end); (lmb)++) 31 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]) 36 37 /* 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 42 * per LMB. 43 */ 44 struct of_drconf_cell_v1 { 45 __be64 base_addr; 46 __be32 drc_index; 47 __be32 reserved; 48 __be32 aa_index; 49 __be32 flags; 50 }; 51 52 /* 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. 56 */ 57 struct of_drconf_cell_v2 { 58 u32 seq_lmbs; 59 u64 base_addr; 60 u32 drc_index; 61 u32 aa_index; 62 u32 flags; 63 } __packed; 64 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 69 70 static inline u32 drmem_lmb_size(void) 71 { 72 return drmem_info->lmb_size; 73 } 74 75 #define DRMEM_LMB_RESERVED 0x80000000 76 77 static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb) 78 { 79 lmb->flags |= DRMEM_LMB_RESERVED; 80 } 81 82 static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb) 83 { 84 lmb->flags &= ~DRMEM_LMB_RESERVED; 85 } 86 87 static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb) 88 { 89 return lmb->flags & DRMEM_LMB_RESERVED; 90 } 91 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); 96 97 #ifdef CONFIG_PPC_PSERIES 98 void __init walk_drmem_lmbs_early(unsigned long node, 99 void (*func)(struct drmem_lmb *, const __be32 **)); 100 #endif 101 102 static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb) 103 { 104 lmb->aa_index = 0xffffffff; 105 } 106 107 #ifdef CONFIG_MEMORY_HOTPLUG 108 static inline void lmb_set_nid(struct drmem_lmb *lmb) 109 { 110 lmb->nid = memory_add_physaddr_to_nid(lmb->base_addr); 111 } 112 static inline void lmb_clear_nid(struct drmem_lmb *lmb) 113 { 114 lmb->nid = -1; 115 } 116 #else 117 static inline void lmb_set_nid(struct drmem_lmb *lmb) 118 { 119 } 120 static inline void lmb_clear_nid(struct drmem_lmb *lmb) 121 { 122 } 123 #endif 124 125 #endif /* _ASM_POWERPC_LMB_H */ 126