c6x/mm/dma-coherent.c

1 // SPDX-License-Identifier: GPL-2.0-only
8  *  DMA uncached mapping support.
11  *  Copyright (C) 2000-2004 Russell King
18 #include <linux/dma-map-ops.h>
26  * DMA coherent memory management, can be redefined using the memdma=
41  * Return a DMA coherent and contiguous memory chunk from the DMA memory
58 	u32 pos = (addr - dma_base) >> PAGE_SHIFT;  in __free_dma_pages()
71  * Allocate DMA coherent memory space and return both the kernel
72  * virtual and DMA address for that space.
84 	order = get_count_order(((size - 1) >> PAGE_SHIFT) + 1);  in arch_dma_alloc()
100  * Free DMA coherent memory as defined by the above mapping.
110 	order = get_count_order(((size - 1) >> PAGE_SHIFT) + 1);  in arch_dma_free()
116  * Initialise the coherent DMA memory allocator using the given uncached region.
124 	       "Coherent memory (DMA) region start=0x%x size=0x%x\n",  in coherent_mem_init()
132 	if (dma_size & (PAGE_SIZE - 1))  in coherent_mem_init()