diff options
author | Dinh Nguyen <Dinh.Nguyen@freescale.com> | 2010-10-12 11:29:01 -0500 |
---|---|---|
committer | Sascha Hauer <s.hauer@pengutronix.de> | 2010-10-19 18:44:57 +0200 |
commit | 68a2f7301ae3a97bf7b1713d20de7618c9b9a5f5 (patch) | |
tree | 88551319ae3eda9fe9a1939682026040d1f74f47 /arch/arm/plat-mxc/include/mach/iram.h | |
parent | 81490fcdf406f42fff9d9f57d541788f90242885 (diff) |
ARM: imx: Add iram allocator functions
Add IRAM(Internal RAM) allocation functions using GENERIC_ALLOCATOR.
The allocation size is 4KB multiples to guarantee alignment. The
idea for these functions is for i.MX platforms to use them
to dynamically allocate IRAM usage.
Applies on 2.6.36-rc7
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Reviewed-by: Amit Kucheria <amit.kucheria@canonical.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc/include/mach/iram.h')
-rw-r--r-- | arch/arm/plat-mxc/include/mach/iram.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/iram.h b/arch/arm/plat-mxc/include/mach/iram.h new file mode 100644 index 00000000000..022690c3370 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/iram.h @@ -0,0 +1,41 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ +#include <linux/errno.h> + +#ifdef CONFIG_IRAM_ALLOC + +int __init iram_init(unsigned long base, unsigned long size); +void __iomem *iram_alloc(unsigned int size, unsigned long *dma_addr); +void iram_free(unsigned long dma_addr, unsigned int size); + +#else + +static inline int __init iram_init(unsigned long base, unsigned long size) +{ + return -ENOMEM; +} + +static inline void __iomem *iram_alloc(unsigned int size, unsigned long *dma_addr) +{ + return NULL; +} + +static inline void iram_free(unsigned long base, unsigned long size) {} + +#endif |