代码如下: voidmem_init(void){structmem*mem;LWIP_ASSERT("Sanity check alignment",(SIZEOF_STRUCT_MEM&(MEM_ALIGNMENT-1))==0);/* align the heap */ram=(u8_t*)LWIP_MEM_ALIGN(LWIP_RAM_HEAP_POINTER);/* initialize the start of the heap */mem=(structmem*)(void*)ram;mem->next=MEM_SIZE...
LWIP_ASSERT("Sanity check alignment", (SIZEOF_STRUCT_MEM & (MEM_ALIGNMENT-1)) == 0); /* align the heap */ ram = LWIP_MEM_ALIGN(ram_heap); /* initialize the start of the heap */ mem = (structmem *)ram;//ram为全局变量//next和prev并不是指针,他们只是代表下一个(前一个)可使用...
关于页表项就按unicore的理解,比较简单.||--->sanity_check_meminfo();| 以一块2G DRAM为例,前期meminfo.nr_banks =1;|开启高端内处支持,则需将meminfo分成两个bank,|(为什么以bank作为变量名,DRAM的物理组成就有bank的概念,|此处需要作出区分)|--->structmembank *bank = &meminfo.bank[0];| memove(b...
sanity_check_meminfo(mi); prepare_page_table(mi); bootmem_init(mi); devicemaps_init(mdesc); top_pmd = pmd_off_k(0xffff0000); zero_page = alloc_bootmem_low_pages(PAGE_SIZE); memzero(zero_page, PAGE_SIZE); empty_zero_page = virt_to_page(zero_page); flush_dcache_page(empty_zero...
LWIP_ASSERT("Sanity check alignment", (SIZEOF_STRUCT_MEM & (MEM_ALIGNMENT-1)) == 0); /* align the heap */ ram = LWIP_MEM_ALIGN(ram_heap); //将堆空间首地址ram_heap按4字节地址对齐 /* initialize the start of the heap */
7、_ALIGNED 为对齐后的数据空间为 8192 / 堆内存的大小为MEM_SIZE_ALIGNED+(2*SIZEOF_STRUCT_MEM)+MEMALIGNMENT=8192+2*MEN 结构体的大小 +4voidmem_init(void) struct mem *mem;/ 定义一个 mem结构体指针变量LWIP_ASSERT("Sanity checkalignment",(SIZEOF_STRUCT_MEM &(MEM_ALIGNMENT-1) = 0);...
# (and called to re-check before build) # This script does some sanity checks on some of the data # Usage: # devel-check-sanity.sh [batch at pos1] # * argument 1 can be "batch" then script works more as not-interactive one source 'support.sh' || { echo "Can not load lib" ...
sanity_check_meminfo(mi); prepare_page_table(mi); bootmem_init(mi); devicemaps_init(mdesc); top_pmd = pmd_off_k(0xffff0000); zero_page = alloc_bootmem_low_pages(PAGE_SIZE); memzero(zero_page, PAGE_SIZE); empty_zero_page = virt_to_page(zero_page); ...
MEM_SIZE_ALIGNED+(2*SIZEOF_STRUCT_MEM)+MEM _ALIGNMENT=8192+2*MEN结构体的大小+4 void mem_init(void) { struct mem *mem; //定义一个mem 结构体指针变量LWIP_ASSERT("Sanity check alignment", (SIZEOF_STRUCT_MEM & (MEM_ALIGNMENT-1)) == 0); /* align the heap */ ...
*/ vm_flags = vma->vm_flags; goto unmap_writable; } } vm_flags = vma->vm_flags; } else if (vm_flags & VM_SHARED) { error = shmem_zero_setup(vma); //9 if (error) goto free_vma; } else { vma_set_anonymous(vma); //10 } /* Allow architectures to sanity-check the vm_...