Function rt_hw_mmu_map

libcpu/risc-v/common64/mmu.c:182–217

* @brief Maps a virtual address space to a physical address space. * * This function maps a specified range of virtual addresses to a range of physical addresses * and sets the attributes of the page table entries (PTEs). If an error occurs during the * mapping process, the function will automatically roll back any partially completed mappings. * * @param aspace Pointer to the address space

 *
 */
void *rt_hw_mmu_map(struct rt_aspace *aspace, void *v_addr, void *p_addr,
                    size_t size, size_t attr)
{
    int ret = -1;
    void *unmap_va = v_addr;
    size_t npages = size >> ARCH_PAGE_SHIFT;

    /* TODO trying with HUGEPAGE here */
    while (npages--)
    {
        MM_PGTBL_LOCK(aspace);
        ret = _map_one_page(aspace, v_addr, p_addr, attr);
        MM_PGTBL_UNLOCK(aspace);
        if (ret != 0)
        {
            /* error, undo map */
            while (unmap_va != v_addr)
            {
                MM_PGTBL_LOCK(aspace);
                _unmap_area(aspace, unmap_va);
                MM_PGTBL_UNLOCK(aspace);
                unmap_va += ARCH_PAGE_SIZE;
            }
            break;
        }
        v_addr += ARCH_PAGE_SIZE;
        p_addr += ARCH_PAGE_SIZE;
    }

    if (ret == 0)
    {
        return unmap_va;
    }

    return NULL;
}

/* unmap page table entry */
static void _unmap_pte(rt_ubase_t *pentry, rt_ubase_t *lvl_entry[], int level)