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/*
* Handling of a sram zone for bestcomm
*
*
* Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#ifndef __BESTCOMM_SRAM_H__
#define __BESTCOMM_SRAM_H__
#include <asm/rheap.h>
#include <asm/mmu.h>
#include <linux/spinlock.h>
/* Structure used internally */
/* The internals are here for the inline functions
* sake, certainly not for the user to mess with !
*/
struct bcom_sram {
phys_addr_t base_phys;
void *base_virt;
unsigned int size;
rh_info_t *rh;
spinlock_t lock;
};
extern struct bcom_sram *bcom_sram;
/* Public API */
extern int bcom_sram_init(struct device_node *sram_node, char *owner);
extern void bcom_sram_cleanup(void);
extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys);
extern void bcom_sram_free(void *ptr);
static inline phys_addr_t bcom_sram_va2pa(void *va) {
return bcom_sram->base_phys +
(unsigned long)(va - bcom_sram->base_virt);
}
static inline void *bcom_sram_pa2va(phys_addr_t pa) {
return bcom_sram->base_virt +
(unsigned long)(pa - bcom_sram->base_phys);
}
#endif /* __BESTCOMM_SRAM_H__ */