diff options
author | Sylvain Munaut <tnt@246tNt.com> | 2007-09-16 12:53:27 +0200 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2007-10-17 01:09:34 +0200 |
commit | 2f9ea1bde0d12d8fb5a7bdc7ab6834275d456262 (patch) | |
tree | f24cbb1c117788dd8cb529bf7812f4567f962812 /arch/powerpc/sysdev/bestcomm/sram.h | |
parent | [POWERPC] mpc52xx: Update mpc52xx_psc structure with B revision changes (diff) | |
download | linux-2f9ea1bde0d12d8fb5a7bdc7ab6834275d456262.tar.xz linux-2f9ea1bde0d12d8fb5a7bdc7ab6834275d456262.zip |
[POWERPC] bestcomm: core bestcomm support for Freescale MPC5200
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>
Diffstat (limited to 'arch/powerpc/sysdev/bestcomm/sram.h')
-rw-r--r-- | arch/powerpc/sysdev/bestcomm/sram.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/bestcomm/sram.h b/arch/powerpc/sysdev/bestcomm/sram.h new file mode 100644 index 000000000000..b6d668963cce --- /dev/null +++ b/arch/powerpc/sysdev/bestcomm/sram.h @@ -0,0 +1,54 @@ +/* + * Handling of a sram zone for bestcomm + * + * + * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#ifndef __BESTCOMM_SRAM_H__ +#define __BESTCOMM_SRAM_H__ + +#include <asm/rheap.h> +#include <asm/mmu.h> +#include <linux/spinlock.h> + + +/* Structure used internally */ + /* The internals are here for the inline functions + * sake, certainly not for the user to mess with ! + */ +struct bcom_sram { + phys_addr_t base_phys; + void *base_virt; + unsigned int size; + rh_info_t *rh; + spinlock_t lock; +}; + +extern struct bcom_sram *bcom_sram; + + +/* Public API */ +extern int bcom_sram_init(struct device_node *sram_node, char *owner); +extern void bcom_sram_cleanup(void); + +extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys); +extern void bcom_sram_free(void *ptr); + +static inline phys_addr_t bcom_sram_va2pa(void *va) { + return bcom_sram->base_phys + + (unsigned long)(va - bcom_sram->base_virt); +} + +static inline void *bcom_sram_pa2va(phys_addr_t pa) { + return bcom_sram->base_virt + + (unsigned long)(pa - bcom_sram->base_phys); +} + + +#endif /* __BESTCOMM_SRAM_H__ */ + |