Function _rt_hw_mmu_map

libcpu/mips/gs264/mmu.c:484–527

#ifdef RT_USING_SMART
void *_rt_hw_mmu_map(rt_mmu_info *mmu_info, void *v_addr, void* p_addr, size_t size, size_t attr)
{
    size_t pa_s, pa_e;
    size_t vaddr;
    int pages;
    int ret;

    if (!size)
    {
        return 0;
    }
    pa_s = (size_t)p_addr;
    pa_e = (size_t)p_addr + size - 1;
    pa_s >>= ARCH_PAGE_SHIFT;
    pa_e >>= ARCH_PAGE_SHIFT;
    pages = pa_e - pa_s + 1;
    if (v_addr)
    {
        vaddr = (size_t)v_addr;
        pa_s = (size_t)p_addr;
        if ((vaddr & ARCH_PAGE_MASK) != (pa_s & ARCH_PAGE_MASK))
        {
            return 0;
        }
        vaddr &= ~ARCH_PAGE_MASK;
        if (check_vaddr(mmu_info, (void*)vaddr, pages) != 0)
        {
            return 0;
        }
    }
    else
    {
        vaddr = find_vaddr(mmu_info, pages);
    }
    if (vaddr) {
        ret = __rt_hw_mmu_map(mmu_info, (void*)vaddr, p_addr, pages, attr);
        if (ret == 0)
        {
            rt_hw_cpu_tlb_invalidate();
            return (void*)(vaddr + ((size_t)p_addr & ARCH_PAGE_MASK));
        }
    }
    return 0;
}
#else
void *_rt_hw_mmu_map(rt_mmu_info *mmu_info, void* p_addr, size_t size, size_t attr)
{