216 lines
7.9 KiB
C
216 lines
7.9 KiB
C
/*
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* Copyright (c) 2006-2023, 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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* 2019-03-25 quanzhao the first version
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* 2023-10-10 Shell Add permission control API
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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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#include <mm_aspace.h>
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#define DESC_SEC (0x2)
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#define MEMWBWA ((1<<12)|(3<<2)) /* write back, write allocate */
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#define MEMWB (3<<2) /* write back, no write allocate */
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#define MEMWT (2<<2) /* write through, no write allocate */
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#define SHAREDEVICE (1<<2) /* shared device */
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#define STRONGORDER (0<<2) /* strong ordered */
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#define XN (1<<4) /* eXecute Never */
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#ifdef RT_USING_SMART
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#define AP_RW (1<<10) /* supervisor=RW, user=No */
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#define AP_RO ((1<<10) |(1 << 15)) /* supervisor=RW, user=No */
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#else
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#define AP_RW (3<<10) /* supervisor=RW, user=RW */
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#define AP_RO (2<<10) /* supervisor=RW, user=RO */
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#endif
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#define SHARED (1<<16) /* shareable */
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#define DOMAIN_FAULT (0x0)
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#define DOMAIN_CHK (0x1)
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#define DOMAIN_NOTCHK (0x3)
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#define DOMAIN0 (0x0<<5)
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#define DOMAIN1 (0x1<<5)
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#define DOMAIN0_ATTR (DOMAIN_CHK<<0)
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#define DOMAIN1_ATTR (DOMAIN_FAULT<<2)
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/* device mapping type */
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#define DEVICE_MEM (SHARED|AP_RW|DOMAIN0|SHAREDEVICE|DESC_SEC|XN)
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/* normal memory mapping type */
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#define NORMAL_MEM (SHARED|AP_RW|DOMAIN0|MEMWBWA|DESC_SEC)
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#define STRONG_ORDER_MEM (SHARED|AP_RO|XN|DESC_SEC)
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struct mem_desc
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{
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rt_uint32_t vaddr_start;
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rt_uint32_t vaddr_end;
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rt_uint32_t paddr_start;
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rt_uint32_t attr;
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struct rt_varea varea;
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};
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#define MMU_MAP_MTBL_XN (1<<0)
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#define MMU_MAP_MTBL_A (1<<1)
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#define MMU_MAP_MTBL_B (1<<2)
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#define MMU_MAP_MTBL_C (1<<3)
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#define MMU_MAP_MTBL_AP01(x) (x<<4)
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#define MMU_MAP_MTBL_TEX(x) (x<<6)
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#define MMU_MAP_MTBL_AP2(x) (x<<9)
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#define MMU_MAP_MTBL_SHARE (1<<10)
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#define MMU_MAP_MTBL_NG(x) (x<<11)
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#define MMU_MAP_K_ROCB ((MMU_MAP_MTBL_NG(0))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(1)|MMU_MAP_MTBL_AP01(1)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_B|MMU_MAP_MTBL_C|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_K_RO ((MMU_MAP_MTBL_NG(0))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(1)|MMU_MAP_MTBL_AP01(1)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_C|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_K_RWCB ((MMU_MAP_MTBL_NG(0))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(1)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_B|MMU_MAP_MTBL_C|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_K_RW ((MMU_MAP_MTBL_NG(0))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(1)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_K_DEVICE ((MMU_MAP_MTBL_NG(0))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(1)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_B|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_U_ROCB ((MMU_MAP_MTBL_NG(1))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(2)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_B|MMU_MAP_MTBL_C|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_U_RO ((MMU_MAP_MTBL_NG(1))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(2)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_C|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_U_RWCB ((MMU_MAP_MTBL_NG(1))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(3)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_B|MMU_MAP_MTBL_C|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_U_RW ((MMU_MAP_MTBL_NG(1))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(3)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_U_DEVICE ((MMU_MAP_MTBL_NG(1))|(MMU_MAP_MTBL_A|MMU_MAP_MTBL_AP2(0)|MMU_MAP_MTBL_AP01(3)|MMU_MAP_MTBL_TEX(0)|MMU_MAP_MTBL_B|MMU_MAP_MTBL_SHARE))
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#define MMU_MAP_TRACE(attr) (attr)
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#define ARCH_SECTION_SHIFT 20
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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 10
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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_MMU_USED_MASK 3
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#define ARCH_TYPE_SUPERSECTION (1 << 18)
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#define ARCH_ADDRESS_WIDTH_BITS 32
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#define ARCH_VADDR_WIDTH 32
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/**
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* *info it's possible to map (-1ul & ~ARCH_PAGE_MASK) but a not aligned -1 is
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* never returned on a successful mapping
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*/
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#define ARCH_MAP_FAILED ((void *)-1)
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#define RT_HW_MMU_PROT_READ 1
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#define RT_HW_MMU_PROT_WRITE 2
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#define RT_HW_MMU_PROT_EXECUTE 4
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#define RT_HW_MMU_PROT_KERNEL 8
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#define RT_HW_MMU_PROT_USER 16
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#define RT_HW_MMU_PROT_CACHE 32
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int rt_hw_mmu_ioremap_init(struct rt_aspace *aspace, void *v_address, size_t size);
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void rt_hw_init_mmu_table(struct mem_desc *mdesc, rt_uint32_t size);
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void rt_hw_mmu_setup(struct rt_aspace *aspace, struct mem_desc *mdesc, int desc_nr);
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int rt_hw_mmu_map_init(struct rt_aspace *aspace, void *v_address, size_t size, size_t *vtable, size_t pv_off);
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void *rt_hw_mmu_map(struct rt_aspace *aspace, void *v_addr, void *p_addr, size_t size, size_t attr);
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void rt_hw_mmu_unmap(struct rt_aspace *aspace, void *v_addr, size_t size);
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void rt_hw_aspace_switch(struct rt_aspace *aspace);
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void rt_hw_mmu_switch(void *tbl);
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void *rt_hw_mmu_v2p(struct rt_aspace *aspace, void *vaddr);
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void rt_hw_mmu_kernel_map_init(struct rt_aspace *aspace, size_t vaddr_start, size_t size);
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void *rt_hw_mmu_tbl_get(void);
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int rt_hw_mmu_control(struct rt_aspace *aspace, void *vaddr, size_t size, enum rt_mmu_cntl cmd);
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void *rt_hw_mmu_pgtbl_create(void);
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void rt_hw_mmu_pgtbl_delete(void *pgtbl);
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#define AP_APX_MASK (MMU_MAP_MTBL_AP2(0x1) | MMU_MAP_MTBL_AP01(0x3))
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#define AP_APX_URW_KRW (MMU_MAP_MTBL_AP2(0x0) | MMU_MAP_MTBL_AP01(0x3))
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#define AP_APX_URO_KRO (MMU_MAP_MTBL_AP2(0x1) | MMU_MAP_MTBL_AP01(0x2))
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/**
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* @brief Remove permission from attribution
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*
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* @param attr architecture specified mmu attribution
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* @param prot protect that will be removed
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* @return size_t returned attribution
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*/
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rt_inline size_t rt_hw_mmu_attr_rm_perm(size_t attr, rt_base_t prot)
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{
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switch (prot)
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{
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/* remove write permission for user */
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case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_USER:
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if ((attr & AP_APX_MASK) == AP_APX_URW_KRW)
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attr &= ~MMU_MAP_MTBL_AP01(0x1);
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break;
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case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_KERNEL:
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switch (attr & AP_APX_MASK)
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{
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case MMU_MAP_MTBL_AP01(0):
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break;
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case MMU_MAP_MTBL_AP01(3):
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attr = (attr & AP_APX_MASK) | AP_APX_URO_KRO;
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default:
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attr |= MMU_MAP_MTBL_AP2(0x1);
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break;
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}
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break;
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default:
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RT_ASSERT(0);
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}
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return attr;
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}
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/**
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* @brief Add permission from attribution
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*
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* @param attr architecture specified mmu attribution
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* @param prot protect that will be added
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* @return size_t returned attribution
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*/
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rt_inline size_t rt_hw_mmu_attr_add_perm(size_t attr, rt_base_t prot)
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{
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switch (prot)
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{
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/* add write permission for user */
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case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_USER:
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case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_KERNEL:
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attr |= MMU_MAP_MTBL_AP01(0x3);
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attr &= ~MMU_MAP_MTBL_AP2(0x1);
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break;
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default:
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RT_ASSERT(0);
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}
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return attr;
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}
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/**
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* @brief Test permission from attribution
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*
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* @param attr architecture specified mmu attribution
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* @param prot protect that will be test
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* @return rt_bool_t RT_TRUE if the prot is allowed, otherwise RT_FALSE
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*/
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rt_inline rt_bool_t rt_hw_mmu_attr_test_perm(size_t attr, rt_base_t prot)
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{
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rt_bool_t rc = 0;
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switch (prot)
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{
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/* test write permission for user */
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case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_USER:
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rc = (AP_APX_MASK & attr) == (AP_APX_URW_KRW);
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break;
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default:
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RT_ASSERT(0);
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}
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return rc;
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}
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#endif
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