85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/**
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* @file mm_space.c
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* @author ATShining (1358745329@qq.com)
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* @brief
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* @version 0.1
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* @date 2023-09-29
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*
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* @copyright Copyright (c) 2023
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*
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*/
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#include "types.h"
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#include "util.h"
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#include "mm_space.h"
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#include "mpu.h"
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#include "assert.h"
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void mm_space_init(mm_space_t *mm_space, int is_knl)
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{
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// region_info_t *regi_info;
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for (int i = 0; i < CONFIG_REGION_NUM; i++)
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{
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mm_space->pt_regions[i].region_inx = -1;
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}
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if (!is_knl)
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{
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// regi_info = mm_space_alloc_pt_region(mm_space);
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// assert(regi_info);
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// mm_pages_init(&mm_space->mm_pages, regi_info);
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}
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}
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region_info_t *mm_space_alloc_pt_region(mm_space_t *m_space)
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{
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for (int i = 0; i < CONFIG_REGION_NUM; i++)
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{
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/*TODO:原子操作*/
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if (m_space->pt_regions[i].region_inx < 0)
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{
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m_space->pt_regions[i].region_inx = (int16_t)i;
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return &m_space->pt_regions[i];
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}
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}
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return NULL;
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}
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void mm_space_free_pt_region(mm_space_t *m_space, region_info_t *ri)
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{
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ri->region_inx = -1;
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}
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bool_t mm_space_add(mm_space_t *m_space,
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umword_t addr,
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umword_t size,
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uint8_t attrs)
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{
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region_info_t *ri = mm_space_alloc_pt_region(m_space);
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if (!ri)
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{
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return FALSE;
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}
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if (!is_power_of_2(size) || (addr & (!(size - 1))) != 0)
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{
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//!< 申请的大小必须是2的整数倍，而且地址也必须是2的整数倍
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mm_space_free_pt_region(m_space, ri);
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return FALSE;
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}
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mpu_calc_regs(ri, addr, ffs(size), attrs, 0);
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ri->start_addr = addr;
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ri->size = size;
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return TRUE;
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}
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void mm_space_del(mm_space_t *m_space, umword_t addr)
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{
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for (int i = 0; i < CONFIG_REGION_NUM; i++)
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{
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if (m_space->pt_regions[i].region_inx >= 0 &&
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m_space->pt_regions[i].start_addr == addr)
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{
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m_space->pt_regions[i].region_inx = -1;
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m_space->pt_regions[i].start_addr = 0;
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break;
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}
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}
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}
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