/* SPDX-License-Identifier: GPL-2.0 */ /* * Support for Medifield PNW Camera Imaging ISP subsystem. * * Copyright (c) 2010 Intel Corporation. All Rights Reserved. * * Copyright (c) 2010 Silicon Hive www.siliconhive.com. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * */ /* * ISP MMU driver for classic two-level page tables */ #ifndef __ISP_MMU_H__ #define __ISP_MMU_H__ #include <linux/types.h> #include <linux/mutex.h> #include <linux/slab.h> /* * do not change these values, the page size for ISP must be the * same as kernel's page size. */ #define ISP_PAGE_OFFSET … #define ISP_PAGE_SIZE … #define ISP_PAGE_MASK … #define ISP_L1PT_OFFSET … #define ISP_L1PT_MASK … #define ISP_L2PT_OFFSET … #define ISP_L2PT_MASK … #define ISP_L1PT_PTES … #define ISP_L2PT_PTES … #define ISP_PTR_TO_L1_IDX(x) … #define ISP_PTR_TO_L2_IDX(x) … #define ISP_PAGE_ALIGN(x) … #define ISP_PT_TO_VIRT(l1_idx, l2_idx, offset) … #define pgnr_to_size(pgnr) … #define size_to_pgnr_ceil(size) … #define size_to_pgnr_bottom(size) … struct isp_mmu; struct isp_mmu_client { … }; struct isp_mmu { … }; /* flags for PDE and PTE */ #define ISP_PTE_VALID_MASK(mmu) … #define ISP_PTE_VALID(mmu, pte) … #define NULL_PAGE … #define PAGE_VALID(page) … /* * init mmu with specific mmu driver. */ int isp_mmu_init(struct isp_mmu *mmu, struct isp_mmu_client *driver); /* * cleanup all mmu related things. */ void isp_mmu_exit(struct isp_mmu *mmu); /* * setup/remove address mapping for pgnr continuous physical pages * and isp_virt. * * map/unmap is mutex lock protected, and caller does not have * to do lock/unlock operation. * * map/unmap will not flush tlb, and caller needs to deal with * this itself. */ int isp_mmu_map(struct isp_mmu *mmu, unsigned int isp_virt, phys_addr_t phys, unsigned int pgnr); void isp_mmu_unmap(struct isp_mmu *mmu, unsigned int isp_virt, unsigned int pgnr); static inline void isp_mmu_flush_tlb_all(struct isp_mmu *mmu) { … } #define isp_mmu_flush_tlb … static inline void isp_mmu_flush_tlb_range(struct isp_mmu *mmu, unsigned int start, unsigned int size) { … } #endif /* ISP_MMU_H_ */
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