| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * mach/sram.h - DaVinci simple SRAM allocator |
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| 4 | * |
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| 5 | * Copyright (C) 2009 David Brownell |
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| 6 | */ |
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| 7 | #ifndef __MACH_SRAM_H |
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| 8 | #define __MACH_SRAM_H |
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| 9 | |
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| 10 | /* ARBITRARY: SRAM allocations are multiples of this 2^N size */ |
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| 11 | #define SRAM_GRANULARITY 512 |
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| 12 | |
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| 13 | /* |
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| 14 | * SRAM allocations return a CPU virtual address, or NULL on error. |
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| 15 | * If a DMA address is requested and the SRAM supports DMA, its |
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| 16 | * mapped address is also returned. |
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| 17 | * |
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| 18 | * Errors include SRAM memory not being available, and requesting |
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| 19 | * DMA mapped SRAM on systems which don't allow that. |
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| 20 | */ |
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| 21 | extern void *sram_alloc(size_t len, dma_addr_t *dma); |
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| 22 | extern void sram_free(void *addr, size_t len); |
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| 23 | |
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| 24 | /* Get the struct gen_pool * for use in platform data */ |
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| 25 | extern struct gen_pool *sram_get_gen_pool(void); |
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| 26 | |
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| 27 | #endif /* __MACH_SRAM_H */ |
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| 28 | |
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