| Sylvain Munaut | 2f9ea1b | 2007-09-16 20:53:27 +1000 | [diff] [blame] | 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 | |