[linux-2.6-block.git] / arch / powerpc / include / asm / drmem.h

/*
 * 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

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;
	u32                     lmb_size;
};

extern struct drmem_lmb_info *drmem_info;

#define for_each_drmem_lmb_in_range(lmb, start, end)		\
	for ((lmb) = (start); (lmb) <= (end); (lmb)++)

#define for_each_drmem_lmb(lmb)					\
	for_each_drmem_lmb_in_range((lmb),			\
		&drmem_info->lmbs[0],				\
		&drmem_info->lmbs[drmem_info->n_lmbs - 1])

/*
 * 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 u32 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 */
Commit	Line	Data
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 */