1/*
2 * Handling of a sram zone for bestcomm
3 *
4 *
5 * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
6 *
7 * This file is licensed under the terms of the GNU General Public License
8 * version 2. This program is licensed "as is" without any warranty of any
9 * kind, whether express or implied.
10 */
11
12#ifndef __BESTCOMM_SRAM_H__
13#define __BESTCOMM_SRAM_H__
14
15#include <asm/rheap.h>
16#include <asm/mmu.h>
17#include <linux/spinlock.h>
18
19
20/* Structure used internally */
21	/* The internals are here for the inline functions
22	 * sake, certainly not for the user to mess with !
23	 */
24struct bcom_sram {
25	phys_addr_t		 base_phys;
26	void 			*base_virt;
27	unsigned int		 size;
28	rh_info_t		*rh;
29	spinlock_t		 lock;
30};
31
32extern struct bcom_sram *bcom_sram;
33
34
35/* Public API */
36extern int  bcom_sram_init(struct device_node *sram_node, char *owner);
37extern void bcom_sram_cleanup(void);
38
39extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys);
40extern void  bcom_sram_free(void *ptr);
41
42static inline phys_addr_t bcom_sram_va2pa(void *va) {
43	return bcom_sram->base_phys +
44		(unsigned long)(va - bcom_sram->base_virt);
45}
46
47static inline void *bcom_sram_pa2va(phys_addr_t pa) {
48	return bcom_sram->base_virt +
49		(unsigned long)(pa - bcom_sram->base_phys);
50}
51
52
53#endif  /* __BESTCOMM_SRAM_H__ */
54
55