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arch/arm/cpu/armv7/start.S

1    ENTRY(c_runtime_cpu_setup)
2    /*
3     * If I-cache is enabled invalidate it
4     */
5    #ifndef CONFIG_SYS_ICACHE_OFF
6            mcr     p15, 0, r0, c7, c5, 0   @ invalidate icache
7            mcr     p15, 0, r0, c7, c10, 4  @ DSB
8            mcr     p15, 0, r0, c7, c5, 4   @ ISB
9    #endif
10
11            bx      lr
12
13    ENDPROC(c_runtime_cpu_setup)

• 5번 줄의 CONFIG_SYS_ICACHE_OFF은 정의되어 있지 않아 if문이 수행됩니다.

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