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 }; 21 22 struct drmem_lmb_info { 23 struct drmem_lmb *lmbs; 24 int n_lmbs; 25 u32 lmb_size; 26 }; 27 28 extern struct drmem_lmb_info *drmem_info; 29 30 #define for_each_drmem_lmb_in_range(lmb, start, end) \ 31 for ((lmb) = (start); (lmb) <= (end); (lmb)++) 32 33 #define for_each_drmem_lmb(lmb) \ 34 for_each_drmem_lmb_in_range((lmb), \ 35 &drmem_info->lmbs[0], \ 36 &drmem_info->lmbs[drmem_info->n_lmbs - 1]) 37 38 /* 39 * The of_drconf_cell_v1 struct defines the layout of the LMB data 40 * specified in the ibm,dynamic-memory device tree property. 41 * The property itself is a 32-bit value specifying the number of 42 * LMBs followed by an array of of_drconf_cell_v1 entries, one 43 * per LMB. 44 */ 45 struct of_drconf_cell_v1 { 46 __be64 base_addr; 47 __be32 drc_index; 48 __be32 reserved; 49 __be32 aa_index; 50 __be32 flags; 51 }; 52 53 /* 54 * Version 2 of the ibm,dynamic-memory property is defined as a 55 * 32-bit value specifying the number of LMB sets followed by an 56 * array of of_drconf_cell_v2 entries, one per LMB set. 57 */ 58 struct of_drconf_cell_v2 { 59 u32 seq_lmbs; 60 u64 base_addr; 61 u32 drc_index; 62 u32 aa_index; 63 u32 flags; 64 } __packed; 65 66 #define DRCONF_MEM_ASSIGNED 0x00000008 67 #define DRCONF_MEM_AI_INVALID 0x00000040 68 #define DRCONF_MEM_RESERVED 0x00000080 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 #endif /* _ASM_POWERPC_LMB_H */ 103