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 
sh_phys_to_pte(struct isp_mmu * mmu,phys_addr_t phys)31 static unsigned int sh_phys_to_pte(struct isp_mmu *mmu,
32 				   phys_addr_t phys)
33 {
34 	return phys >> ISP_PAGE_OFFSET;
35 }
36 
sh_pte_to_phys(struct isp_mmu * mmu,unsigned int pte)37 static 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 
sh_get_pd_base(struct isp_mmu * mmu,phys_addr_t phys)45 static 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  */
sh_tlb_flush(struct isp_mmu * mmu)64 static void sh_tlb_flush(struct isp_mmu *mmu)
65 {
66 	ia_css_mmu_invalidate_cache();
67 }
68 
69 struct 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