1 /* 2 * drmem.h: Power specific logical memory block representation 3 * 4 * Copyright 2017 IBM Corporation 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #ifndef _ASM_POWERPC_LMB_H 13 #define _ASM_POWERPC_LMB_H 14 15 struct drmem_lmb { 16 u64 base_addr; 17 u32 drc_index; 18 u32 aa_index; 19 u32 flags; 20 #ifdef CONFIG_MEMORY_HOTPLUG 21 int nid; 22 #endif 23 }; 24 25 struct drmem_lmb_info { 26 struct drmem_lmb *lmbs; 27 int n_lmbs; 28 u32 lmb_size; 29 }; 30 31 extern struct drmem_lmb_info *drmem_info; 32 33 #define for_each_drmem_lmb_in_range(lmb, start, end) \ 34 for ((lmb) = (start); (lmb) <= (end); (lmb)++) 35 36 #define for_each_drmem_lmb(lmb) \ 37 for_each_drmem_lmb_in_range((lmb), \ 38 &drmem_info->lmbs[0], \ 39 &drmem_info->lmbs[drmem_info->n_lmbs - 1]) 40 41 /* 42 * The of_drconf_cell_v1 struct defines the layout of the LMB data 43 * specified in the ibm,dynamic-memory device tree property. 44 * The property itself is a 32-bit value specifying the number of 45 * LMBs followed by an array of of_drconf_cell_v1 entries, one 46 * per LMB. 47 */ 48 struct of_drconf_cell_v1 { 49 __be64 base_addr; 50 __be32 drc_index; 51 __be32 reserved; 52 __be32 aa_index; 53 __be32 flags; 54 }; 55 56 /* 57 * Version 2 of the ibm,dynamic-memory property is defined as a 58 * 32-bit value specifying the number of LMB sets followed by an 59 * array of of_drconf_cell_v2 entries, one per LMB set. 60 */ 61 struct of_drconf_cell_v2 { 62 u32 seq_lmbs; 63 u64 base_addr; 64 u32 drc_index; 65 u32 aa_index; 66 u32 flags; 67 } __packed; 68 69 #define DRCONF_MEM_ASSIGNED 0x00000008 70 #define DRCONF_MEM_AI_INVALID 0x00000040 71 #define DRCONF_MEM_RESERVED 0x00000080 72 73 static inline u32 drmem_lmb_size(void) 74 { 75 return drmem_info->lmb_size; 76 } 77 78 #define DRMEM_LMB_RESERVED 0x80000000 79 80 static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb) 81 { 82 lmb->flags |= DRMEM_LMB_RESERVED; 83 } 84 85 static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb) 86 { 87 lmb->flags &= ~DRMEM_LMB_RESERVED; 88 } 89 90 static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb) 91 { 92 return lmb->flags & DRMEM_LMB_RESERVED; 93 } 94 95 u64 drmem_lmb_memory_max(void); 96 void __init walk_drmem_lmbs(struct device_node *dn, 97 void (*func)(struct drmem_lmb *, const __be32 **)); 98 int drmem_update_dt(void); 99 100 #ifdef CONFIG_PPC_PSERIES 101 void __init walk_drmem_lmbs_early(unsigned long node, 102 void (*func)(struct drmem_lmb *, const __be32 **)); 103 #endif 104 105 static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb) 106 { 107 lmb->aa_index = 0xffffffff; 108 } 109 110 #ifdef CONFIG_MEMORY_HOTPLUG 111 static inline void lmb_set_nid(struct drmem_lmb *lmb) 112 { 113 lmb->nid = memory_add_physaddr_to_nid(lmb->base_addr); 114 } 115 static inline void lmb_clear_nid(struct drmem_lmb *lmb) 116 { 117 lmb->nid = -1; 118 } 119 #else 120 static inline void lmb_set_nid(struct drmem_lmb *lmb) 121 { 122 } 123 static inline void lmb_clear_nid(struct drmem_lmb *lmb) 124 { 125 } 126 #endif 127 128 #endif /* _ASM_POWERPC_LMB_H */ 129