1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Support for Merrifield PNW Camera Imaging ISP subsystem.
4 *
5 * Copyright (c) 2012 Intel Corporation. All Rights Reserved.
6 *
7 * Copyright (c) 2012 Silicon Hive www.siliconhive.com.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License version
11 * 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 *
19 */
20#include "type_support.h"
21#include "mmu/isp_mmu.h"
22#include "mmu/sh_mmu_mrfld.h"
23#include "atomisp_compat.h"
24
25#define MERR_VALID_PTE_MASK	0x80000000
26
27/*
28 * include SH header file here
29 */
30
31static unsigned int sh_phys_to_pte(struct isp_mmu *mmu,
32				   phys_addr_t phys)
33{
34	return phys >> ISP_PAGE_OFFSET;
35}
36
37static phys_addr_t sh_pte_to_phys(struct isp_mmu *mmu,
38				  unsigned int pte)
39{
40	unsigned int mask = mmu->driver->pte_valid_mask;
41
42	return (phys_addr_t)((pte & ~mask) << ISP_PAGE_OFFSET);
43}
44
45static unsigned int sh_get_pd_base(struct isp_mmu *mmu,
46				   phys_addr_t phys)
47{
48	unsigned int pte = sh_phys_to_pte(mmu, phys);
49
50	return HOST_ADDRESS(pte);
51}
52
53/*
54 * callback to flush tlb.
55 *
56 * tlb_flush_range will at least flush TLBs containing
57 * address mapping from addr to addr + size.
58 *
59 * tlb_flush_all will flush all TLBs.
60 *
61 * tlb_flush_all is must be provided. if tlb_flush_range is
62 * not valid, it will set to tlb_flush_all by default.
63 */
64static void sh_tlb_flush(struct isp_mmu *mmu)
65{
66	ia_css_mmu_invalidate_cache();
67}
68
69struct isp_mmu_client sh_mmu_mrfld = {
70	.name = "Silicon Hive ISP3000 MMU",
71	.pte_valid_mask = MERR_VALID_PTE_MASK,
72	.null_pte = ~MERR_VALID_PTE_MASK,
73	.get_pd_base = sh_get_pd_base,
74	.tlb_flush_all = sh_tlb_flush,
75	.phys_to_pte = sh_phys_to_pte,
76	.pte_to_phys = sh_pte_to_phys,
77};
78