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 | */ |
24 | struct 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 | |
32 | extern struct bcom_sram *bcom_sram; |
33 | |
34 | |
35 | /* Public API */ |
36 | extern int bcom_sram_init(struct device_node *sram_node, char *owner); |
37 | extern void bcom_sram_cleanup(void); |
38 | |
39 | extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys); |
40 | extern void bcom_sram_free(void *ptr); |
41 | |
42 | static 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 | |
47 | static 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 | |