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121 lines
2.9 KiB
121 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* drmem.h: Power specific logical memory block representation |
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* |
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* Copyright 2017 IBM Corporation |
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*/ |
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#ifndef _ASM_POWERPC_LMB_H |
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#define _ASM_POWERPC_LMB_H |
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#include <linux/sched.h> |
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struct drmem_lmb { |
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u64 base_addr; |
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u32 drc_index; |
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u32 aa_index; |
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u32 flags; |
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}; |
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struct drmem_lmb_info { |
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struct drmem_lmb *lmbs; |
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int n_lmbs; |
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u64 lmb_size; |
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}; |
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extern struct drmem_lmb_info *drmem_info; |
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static inline struct drmem_lmb *drmem_lmb_next(struct drmem_lmb *lmb, |
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const struct drmem_lmb *start) |
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{ |
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/* |
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* DLPAR code paths can take several milliseconds per element |
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* when interacting with firmware. Ensure that we don't |
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* unfairly monopolize the CPU. |
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*/ |
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if (((++lmb - start) % 16) == 0) |
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cond_resched(); |
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return lmb; |
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} |
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#define for_each_drmem_lmb_in_range(lmb, start, end) \ |
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for ((lmb) = (start); (lmb) < (end); lmb = drmem_lmb_next(lmb, start)) |
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#define for_each_drmem_lmb(lmb) \ |
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for_each_drmem_lmb_in_range((lmb), \ |
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&drmem_info->lmbs[0], \ |
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&drmem_info->lmbs[drmem_info->n_lmbs]) |
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/* |
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* The of_drconf_cell_v1 struct defines the layout of the LMB data |
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* specified in the ibm,dynamic-memory device tree property. |
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* The property itself is a 32-bit value specifying the number of |
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* LMBs followed by an array of of_drconf_cell_v1 entries, one |
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* per LMB. |
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*/ |
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struct of_drconf_cell_v1 { |
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__be64 base_addr; |
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__be32 drc_index; |
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__be32 reserved; |
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__be32 aa_index; |
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__be32 flags; |
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}; |
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/* |
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* Version 2 of the ibm,dynamic-memory property is defined as a |
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* 32-bit value specifying the number of LMB sets followed by an |
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* array of of_drconf_cell_v2 entries, one per LMB set. |
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*/ |
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struct of_drconf_cell_v2 { |
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u32 seq_lmbs; |
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u64 base_addr; |
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u32 drc_index; |
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u32 aa_index; |
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u32 flags; |
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} __packed; |
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#define DRCONF_MEM_ASSIGNED 0x00000008 |
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#define DRCONF_MEM_AI_INVALID 0x00000040 |
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#define DRCONF_MEM_RESERVED 0x00000080 |
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#define DRCONF_MEM_HOTREMOVABLE 0x00000100 |
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static inline u64 drmem_lmb_size(void) |
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{ |
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return drmem_info->lmb_size; |
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} |
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#define DRMEM_LMB_RESERVED 0x80000000 |
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static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb) |
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{ |
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lmb->flags |= DRMEM_LMB_RESERVED; |
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} |
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static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb) |
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{ |
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lmb->flags &= ~DRMEM_LMB_RESERVED; |
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} |
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static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb) |
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{ |
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return lmb->flags & DRMEM_LMB_RESERVED; |
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} |
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u64 drmem_lmb_memory_max(void); |
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int walk_drmem_lmbs(struct device_node *dn, void *data, |
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int (*func)(struct drmem_lmb *, const __be32 **, void *)); |
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int drmem_update_dt(void); |
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#ifdef CONFIG_PPC_PSERIES |
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int __init |
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walk_drmem_lmbs_early(unsigned long node, void *data, |
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int (*func)(struct drmem_lmb *, const __be32 **, void *)); |
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#endif |
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static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb) |
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{ |
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lmb->aa_index = 0xffffffff; |
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} |
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#endif /* _ASM_POWERPC_LMB_H */
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