dma.c (c95baf12f5077419db01313ab61c2aac007d40cd) dma.c (68fbb9721ea76b2a3088b749e004456f2de05b9f)
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/dma-direct.h>
3#include <linux/init.h>
4#include <linux/swiotlb.h>
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/dma-direct.h>
3#include <linux/init.h>
4#include <linux/swiotlb.h>
5#include <boot_param.h>
5
6dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
7{
8 /* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
9 * Loongson-3's 48bit address space and embed it into 40bit */
10 long nid = (paddr >> 44) & 0x3;
6
7dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
8{
9 /* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
10 * Loongson-3's 48bit address space and embed it into 40bit */
11 long nid = (paddr >> 44) & 0x3;
11 return ((nid << 44) ^ paddr) | (nid << 37);
12
13 return ((nid << 44) ^ paddr) | (nid << node_id_offset);
12}
13
14phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr)
15{
16 /* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
17 * Loongson-3's 48bit address space and embed it into 40bit */
14}
15
16phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr)
17{
18 /* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
19 * Loongson-3's 48bit address space and embed it into 40bit */
18 long nid = (daddr >> 37) & 0x3;
19 return ((nid << 37) ^ daddr) | (nid << 44);
20 long nid = (daddr >> node_id_offset) & 0x3;
21
22 return ((nid << node_id_offset) ^ daddr) | (nid << 44);
20}
21
22void __init plat_swiotlb_setup(void)
23{
24 swiotlb_init(1);
25}
23}
24
25void __init plat_swiotlb_setup(void)
26{
27 swiotlb_init(1);
28}