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 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 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 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 */ 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