Commit | Line | Data |
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6c6ea537 NF |
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 | ||
2c777215 NF |
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 | ||
2b31e3ae NF |
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 | ||
2c777215 NF |
66 | #define DRCONF_MEM_ASSIGNED 0x00000008 |
67 | #define DRCONF_MEM_AI_INVALID 0x00000040 | |
68 | #define DRCONF_MEM_RESERVED 0x00000080 | |
69 | ||
6c6ea537 NF |
70 | static inline u32 drmem_lmb_size(void) |
71 | { | |
72 | return drmem_info->lmb_size; | |
73 | } | |
74 | ||
6195a500 NF |
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 | ||
514a9cb3 NF |
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 **)); | |
6195a500 | 95 | int drmem_update_dt(void); |
514a9cb3 | 96 | |
6c6ea537 NF |
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 | ||
063b8b12 NF |
102 | static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb) |
103 | { | |
104 | lmb->aa_index = 0xffffffff; | |
105 | } | |
106 | ||
6c6ea537 | 107 | #endif /* _ASM_POWERPC_LMB_H */ |