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