基于msm-5.4
一、C代码部分
1. 调用路径
_head //head.S
stext //head.S
__primary_switch //head.S
__primary_switched //head.S
kaslr_early_init //kaslr.c 最先调用，可配置会否生效与不生效，默认生效
early_fixmap_init
start_kernel
setup_arch //setup.c 主要路径
early_fixmap_init
early_ioremap_init
setup_machine_fdt
early_init_dt_scan(params) //fdt.c
early_init_dt_scan_nodes //fdt.c
early_init_dt_scan_memory //fdt.c 解析memory内存节点，填充memory内存区
arm64_memblock_init
early_init_fdt_scan_reserved_mem //fdt.c 解析reserved内存，填充reserved内存区
paging_init
bootmem_init
memblocks_present //sparse.c
sparse_init //sparse.c
zone_sizes_init //init.c
memblock_dump_all //memblock.h dump所有memory区域和reserved区域
early_ioremap_reset //标记内存已经初始化好了
build_all_zonelists //page_alloc.c
page_alloc_init //page_alloc.c
mm_init //main.c
mem_init //init.c
kmem_cache_init //slab.c
kmemleak_init //kmemleak.c
pgtable_init //mm.h
vmalloc_init //vmalloc.c
标签：25,head,reserved,初始化,early,init,fdt,内存 From： https://www.cnblogs.com/hellokitty2/p/18340117