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打算借linux移植学习内核启动过程，及4412各外设驱动原理
移植时，先修改一些config，然后解决编译出现的问题
System Type-->Multiple platform selection
[*]ARMv7 based platforms(Cortex-A,PJ4,Scorpion, Krait) System Type--->Samsung EXYNOS [*]SAMSUNG EXYNOS4 [*]SAMSUNG EXYNOS4412 File systems--->Network File Systems---> <>NFS client support for NFS version 2 <*>NFS client support for NFS version 3 []NFS server support for NFS version 3 []NFS server support for NFS version 4 编译出现错误： scripts/sign-file.c:23:30: fatal error: openssl/opensslv.h: No such file or directory 解决：apt-get install libssl-dev /tmp/ccKduzSd.s: Assembler messages: /tmp/ccKduzSd.s:869: Error: garbage following instruction -- `dmb ishst' /tmp/ccKduzSd.s:888: Error: garbage following instruction -- `dmb ishst' /tmp/ccKduzSd.s:919: Error: garbage following instruction -- `dmb ish' /tmp/ccKduzSd.s:931: Error: garbage following instruction -- `dsb ishst' 解决： System Type->ARM system type (ARM Ltd. Vesatile family) 配置改为 [*] MMU-based Paged Memory Management Support ARM system type (Allow multiple platforms to be selected) [*] Samsung EXYNOS ---> SAMSUNG EXYNOS4 SAMSUNG EXYNOS4412 问题： CC arch/arm/kernel/suspend.o /tmp/ccgcmPjb.s: Assembler messages: /tmp/ccgcmPjb.s:243: Error: garbage following instruction -- `dsb nshst' /tmp/ccgcmPjb.s:251: Error: garbage following instruction -- `dsb nsh' 解决： Power management options ---> [] Suspend to RAM and standby 问题： CC arch/arm/mm/fault.o /tmp/ccEM41mf.s: Assembler messages: /tmp/ccEM41mf.s:632: Error: garbage following instruction -- `dsb ishst' make[1]: *** [arch/arm/mm/fault.o] Error 1 解决： 替换函数 static inline void flush_pmd_entry(pmd_t *pmd) { const unsigned int __tlb_flag = __cpu_tlb_flags; if (tlb_flag(TLB_DCLEAN)) asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pmd" : : "r" (pmd) : "cc"); if (tlb_flag(TLB_L2CLEAN_FR)) asm("mcr p15, 1, %0, c15, c9, 1 @ L2 flush_pmd" : : "r" (pmd) : "cc"); if (tlb_flag(TLB_WB)) dsb(); } 出错： CC arch/arm/mm/flush.o /tmp/ccobT12L.s: Assembler messages: /tmp/ccobT12L.s:99: Error: garbage following instruction -- `dsb nshst' /tmp/ccobT12L.s:107: Error: garbage following instruction -- `dsb nsh' /tmp/ccobT12L.s:223: Error: garbage following instruction -- `dsb ishst' /tmp/ccobT12L.s:308: Error: garbage following instruction -- `dsb nshst' /tmp/ccobT12L.s:314: Error: garbage following instruction -- `dsb nsh' /tmp/ccobT12L.s:386: Error: garbage following instruction -- `dsb nshst' /tmp/ccobT12L.s:392: Error: garbage following instruction -- `dsb nsh' /tmp/ccobT12L.s:427: Error: garbage following instruction -- `dsb ishst' /tmp/ccobT12L.s:461: Error: garbage following instruction -- `dsb ishst' /tmp/ccobT12L.s:516: Error: garbage following instruction -- `dsb ishst' /tmp/ccobT12L.s:569: Error: garbage following instruction -- `dsb ishst' make[1]: *** [arch/arm/mm/flush.o] Error 1 解决： barrier.h #if __LINUX_ARM_ARCH__ >= 7 #ifdef CONFIG_ARCH_EXYNOS #define isb(option) __asm__ __volatile__ ("isb" : : : "memory") #define dsb(option) __asm__ __volatile__ ("dsb" : : : "memory") #define dmb(option) __asm__ __volatile__ ("dmb" : : : "memory") #else #define isb(option) __asm__ __volatile__ ("isb " #option : : : "memory")aa #define dsb(option) __asm__ __volatile__ ("dsb " #option : : : "memory") #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") #endif 问题： arch/arm/mm/tlb-v7.S: Assembler messages: arch/arm/mm/tlb-v7.S:38: Error: garbage following instruction -- `dsb ish' arch/arm/mm/tlb-v7.S:59: Error: garbage following instruction -- `dsb ish' arch/arm/mm/tlb-v7.S:72: Error: garbage following instruction -- `dsb ish' arch/arm/mm/tlb-v7.S:87: Error: garbage following instruction -- `dsb ish' make[1]: *** [arch/arm/mm/tlb-v7.o] Error 1 proc-v7.S与cache-v7.S也有相同问题 解决： 在对应文件中找到dsb ishst 替换为dsb 编译出错： arch/arm/lib/testchangebit.S: Assembler messages: arch/arm/lib/testchangebit.S:15: Error: garbage following instruction -- `dmb ish' arch/arm/lib/testchangebit.S:15: Error: garbage following instruction -- `dmb ish' make[1]: *** [arch/arm/lib/testchangebit.o] Error 1 修改arch\arm\include\asm\assembler.h 去掉ish 查看代码发现有个angel模式，不明白什么是这个模式，搜了下发现这个模式即ARM's standard semihosting interface ，用于外部调试， 是一种旧办法，现在基本不使用了。（参考：http://stackoverflow.com/questions/38550715/linux-booting-angel-booting） 至此编译通过转载地址：http://tadmz.baihongyu.com/