| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * mach/sram.h - DaVinci simple SRAM allocator |
| * |
| * Copyright (C) 2009 David Brownell |
| */ |
| #ifndef __MACH_SRAM_H |
| #define __MACH_SRAM_H |
| |
| /* ARBITRARY: SRAM allocations are multiples of this 2^N size */ |
| #define SRAM_GRANULARITY 512 |
| |
| /* |
| * SRAM allocations return a CPU virtual address, or NULL on error. |
| * If a DMA address is requested and the SRAM supports DMA, its |
| * mapped address is also returned. |
| * |
| * Errors include SRAM memory not being available, and requesting |
| * DMA mapped SRAM on systems which don't allow that. |
| */ |
| extern void *sram_alloc(size_t len, dma_addr_t *dma); |
| extern void sram_free(void *addr, size_t len); |
| |
| /* Get the struct gen_pool * for use in platform data */ |
| extern struct gen_pool *sram_get_gen_pool(void); |
| |
| #endif /* __MACH_SRAM_H */ |
