2f9ea1bde0
This patch adds support for the core of the BestComm API for the Freescale MPC5200(b). The BestComm engine is a microcode-controlled / tasks-based DMA used by several of the onchip devices. Setting up the tasks / memory allocation and all common low level functions are handled by this patch. The specifics details of each tasks and their microcode are split-out in separate patches. This is not the official API, but a much cleaner one. (hopefully) Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
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* Handling of a sram zone for bestcomm
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*
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*
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* Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#ifndef __BESTCOMM_SRAM_H__
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#define __BESTCOMM_SRAM_H__
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#include <asm/rheap.h>
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#include <asm/mmu.h>
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#include <linux/spinlock.h>
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/* Structure used internally */
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/* The internals are here for the inline functions
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* sake, certainly not for the user to mess with !
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*/
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struct bcom_sram {
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phys_addr_t base_phys;
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void *base_virt;
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unsigned int size;
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rh_info_t *rh;
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spinlock_t lock;
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};
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extern struct bcom_sram *bcom_sram;
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/* Public API */
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extern int bcom_sram_init(struct device_node *sram_node, char *owner);
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extern void bcom_sram_cleanup(void);
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extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys);
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extern void bcom_sram_free(void *ptr);
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static inline phys_addr_t bcom_sram_va2pa(void *va) {
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return bcom_sram->base_phys +
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(unsigned long)(va - bcom_sram->base_virt);
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}
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static inline void *bcom_sram_pa2va(phys_addr_t pa) {
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return bcom_sram->base_virt +
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(unsigned long)(pa - bcom_sram->base_phys);
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}
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#endif /* __BESTCOMM_SRAM_H__ */
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