| David Brownell | 20e9969 | 2009-05-07 09:31:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * mach/sram.h - DaVinci simple SRAM allocator |
| 3 | * |
| 4 | * Copyright (C) 2009 David Brownell |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #ifndef __MACH_SRAM_H |
| 11 | #define __MACH_SRAM_H |
| 12 | |
| 13 | /* ARBITRARY: SRAM allocations are multiples of this 2^N size */ |
| 14 | #define SRAM_GRANULARITY 512 |
| 15 | |
| 16 | /* |
| 17 | * SRAM allocations return a CPU virtual address, or NULL on error. |
| 18 | * If a DMA address is requested and the SRAM supports DMA, its |
| 19 | * mapped address is also returned. |
| 20 | * |
| 21 | * Errors include SRAM memory not being available, and requesting |
| 22 | * DMA mapped SRAM on systems which don't allow that. |
| 23 | */ |
| 24 | extern void *sram_alloc(size_t len, dma_addr_t *dma); |
| 25 | extern void sram_free(void *addr, size_t len); |
| 26 | |
| 27 | #endif /* __MACH_SRAM_H */ |