Function lwp_map_user_phy

components/lwp/lwp_user_mm.c:337–384

}

void *lwp_map_user_phy(struct rt_lwp *lwp, void *map_va, void *map_pa,
                       size_t map_size, int cached)
{
    int err;
    char *va;
    size_t offset = 0;

    if (!map_size)
    {
        return 0;
    }
    if (map_va)
    {
        if (((size_t)map_va & ARCH_PAGE_MASK) !=
            ((size_t)map_pa & ARCH_PAGE_MASK))
        {
            return 0;
        }
    }
    offset = (size_t)map_pa & ARCH_PAGE_MASK;
    map_size += (offset + ARCH_PAGE_SIZE - 1);
    map_size &= ~ARCH_PAGE_MASK;
    map_pa = (void *)((size_t)map_pa & ~ARCH_PAGE_MASK);

    struct rt_mm_va_hint hint = {.flags = 0,
                                 .limit_range_size = lwp->aspace->size,
                                 .limit_start = lwp->aspace->start,
                                 .prefer = map_va,
                                 .map_size = map_size};
    if (map_va != RT_NULL)
        hint.flags |= MMF_MAP_FIXED;

    rt_size_t attr = cached ? MMU_MAP_U_RWCB : MMU_MAP_U_RW;

    err =
        rt_aspace_map_phy(lwp->aspace, &hint, attr, MM_PA_TO_OFF(map_pa), (void **)&va);
    if (err != RT_EOK)
    {
        va = RT_NULL;
        LOG_W("%s", __func__);
    }
    else
    {
        va += offset;
    }

    return va;
}

rt_base_t lwp_brk(void *addr)
{