1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Handling of a sram zone for bestcomm 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com> 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * This file is licensed under the terms of the GNU General Public License 8*4882a593Smuzhiyun * version 2. This program is licensed "as is" without any warranty of any 9*4882a593Smuzhiyun * kind, whether express or implied. 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef __BESTCOMM_SRAM_H__ 13*4882a593Smuzhiyun #define __BESTCOMM_SRAM_H__ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <asm/rheap.h> 16*4882a593Smuzhiyun #include <asm/mmu.h> 17*4882a593Smuzhiyun #include <linux/spinlock.h> 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun /* Structure used internally */ 21*4882a593Smuzhiyun /* The internals are here for the inline functions 22*4882a593Smuzhiyun * sake, certainly not for the user to mess with ! 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun struct bcom_sram { 25*4882a593Smuzhiyun phys_addr_t base_phys; 26*4882a593Smuzhiyun void *base_virt; 27*4882a593Smuzhiyun unsigned int size; 28*4882a593Smuzhiyun rh_info_t *rh; 29*4882a593Smuzhiyun spinlock_t lock; 30*4882a593Smuzhiyun }; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun extern struct bcom_sram *bcom_sram; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun /* Public API */ 36*4882a593Smuzhiyun extern int bcom_sram_init(struct device_node *sram_node, char *owner); 37*4882a593Smuzhiyun extern void bcom_sram_cleanup(void); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys); 40*4882a593Smuzhiyun extern void bcom_sram_free(void *ptr); 41*4882a593Smuzhiyun bcom_sram_va2pa(void * va)42*4882a593Smuzhiyunstatic inline phys_addr_t bcom_sram_va2pa(void *va) { 43*4882a593Smuzhiyun return bcom_sram->base_phys + 44*4882a593Smuzhiyun (unsigned long)(va - bcom_sram->base_virt); 45*4882a593Smuzhiyun } 46*4882a593Smuzhiyun bcom_sram_pa2va(phys_addr_t pa)47*4882a593Smuzhiyunstatic inline void *bcom_sram_pa2va(phys_addr_t pa) { 48*4882a593Smuzhiyun return bcom_sram->base_virt + 49*4882a593Smuzhiyun (unsigned long)(pa - bcom_sram->base_phys); 50*4882a593Smuzhiyun } 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #endif /* __BESTCOMM_SRAM_H__ */ 54*4882a593Smuzhiyun 55