146 lines
5.1 KiB
C
146 lines
5.1 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-05-12 RT-Thread the first version
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*/
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#ifndef __MMU_H_
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#define __MMU_H_
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#include <rtthread.h>
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/* normal memory wra mapping type */
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#define NORMAL_MEM 0
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/* normal nocache memory mapping type */
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#define NORMAL_NOCACHE_MEM 1
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/* device mapping type */
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#define DEVICE_MEM 2
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struct mem_desc
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{
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unsigned long vaddr_start;
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unsigned long vaddr_end;
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unsigned long paddr_start;
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unsigned long attr;
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};
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#define MMU_AF_SHIFT 10
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#define MMU_SHARED_SHIFT 8
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#define MMU_AP_SHIFT 6
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#define MMU_MA_SHIFT 2
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#define MMU_AP_KAUN 0UL /* kernel r/w, user none */
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#define MMU_AP_KAUA 1UL /* kernel r/w, user r/w */
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#define MMU_AP_KRUN 2UL /* kernel r, user none */
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#define MMU_AP_KRUR 3UL /* kernel r, user r */
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#define MMU_MAP_K_RO (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KRUN << MMU_AP_SHIFT) |\
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(NORMAL_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_K_RWCB (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KAUN << MMU_AP_SHIFT) |\
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(NORMAL_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_K_RW (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KAUN << MMU_AP_SHIFT) |\
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(NORMAL_NOCACHE_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_K_DEVICE (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KAUN << MMU_AP_SHIFT) |\
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(DEVICE_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_U_RO (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KRUR << MMU_AP_SHIFT) |\
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(NORMAL_NOCACHE_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_U_RWCB (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KAUA << MMU_AP_SHIFT) |\
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(NORMAL_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_U_RW (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KAUA << MMU_AP_SHIFT) |\
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(NORMAL_NOCACHE_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_U_DEVICE (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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(MMU_AP_KAUA << MMU_AP_SHIFT) |\
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(DEVICE_MEM << MMU_MA_SHIFT)\
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)
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#define MMU_MAP_CUSTOM(ap, mtype) (\
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(0x1UL << MMU_AF_SHIFT) |\
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(0x2UL << MMU_SHARED_SHIFT) |\
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((ap) << MMU_AP_SHIFT) |\
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((mtype) << MMU_MA_SHIFT)\
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)
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#define ARCH_SECTION_SHIFT 21
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#define ARCH_SECTION_SIZE (1 << ARCH_SECTION_SHIFT)
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#define ARCH_SECTION_MASK (ARCH_SECTION_SIZE - 1)
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#define ARCH_PAGE_SHIFT 12
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#define ARCH_PAGE_SIZE (1 << ARCH_PAGE_SHIFT)
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#define ARCH_PAGE_MASK (ARCH_PAGE_SIZE - 1)
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#define ARCH_PAGE_TBL_SHIFT 12
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#define ARCH_PAGE_TBL_SIZE (1 << ARCH_PAGE_TBL_SHIFT)
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#define ARCH_PAGE_TBL_MASK (ARCH_PAGE_TBL_SIZE - 1)
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#define ARCH_ADDRESS_WIDTH_BITS 64
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#define MMU_MAP_ERROR_VANOTALIGN -1
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#define MMU_MAP_ERROR_PANOTALIGN -2
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#define MMU_MAP_ERROR_NOPAGE -3
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#define MMU_MAP_ERROR_CONFLICT -4
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typedef struct
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{
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size_t *vtable;
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size_t vstart;
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size_t vend;
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size_t pv_off;
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} rt_mmu_info;
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void rt_hw_mmu_setup_early(unsigned long *tbl0, unsigned long *tbl1, unsigned long size, unsigned long pv_off);
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void rt_hw_mmu_setup(struct mem_desc *mdesc, int desc_nr);
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int rt_hw_mmu_map_init(rt_mmu_info *mmu_info, void* v_address, size_t size, size_t *vtable, size_t pv_off);
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int rt_hw_mmu_ioremap_init(rt_mmu_info *mmu_info, void* v_address, size_t size);
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#ifdef RT_USING_SMART
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void *rt_hw_mmu_map(rt_mmu_info *mmu_info, void *v_addr, void* p_addr, size_t size, size_t attr);
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void *rt_hw_mmu_map_auto(rt_mmu_info *mmu_info, void *v_addr, size_t size, size_t attr);
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#else
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void *rt_hw_mmu_map(rt_mmu_info *mmu_info, void* p_addr, size_t size, size_t attr);
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#endif
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void rt_hw_mmu_unmap(rt_mmu_info *mmu_info, void* v_addr, size_t size);
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void *rt_hw_mmu_v2p(rt_mmu_info *mmu_info, void* v_addr);
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void rt_hw_mmu_ktbl_set(unsigned long tbl);
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void *rt_hw_mmu_tbl_get();
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void rt_hw_mmu_switch(void *mmu_table);
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void rt_hw_init_mmu_table(struct mem_desc *mdesc, rt_size_t desc_nr);
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void rt_hw_mmu_init(void);
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extern rt_mmu_info mmu_info;
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#endif
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