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