int cleanup_before_linux (void) { /* * this function is called just before we call linux * it prepares the processor for linux * * we turn off caches etc ... */ disable_interrupts (); #ifdef CONFIG_LCD { extern void lcd_disable(void); extern void lcd_panel_disable(void); lcd_disable(); /* proper disable of lcd & panel */ lcd_panel_disable(); } #endif /* turn off I/D-cache */ icache_disable(); dcache_disable(); /* flush I/D-cache */ cache_flush(); /*Workaround to enable L2CC during kernel decompressing*/ #ifdef fixup_before_linux fixup_before_linux; #endif return 0; }
int cleanup_before_linux(void) { /* * this function is called just before we call linux * it prepares the processor for linux * * we turn off caches etc ... */ #ifndef CONFIG_SPL_BUILD disable_interrupts(); #ifdef CONFIG_LCD { /* switch off LCD panel */ lcd_panel_disable(); /* disable LCD controller */ lcd_disable(); } #endif /* CONFIG_LCD */ #endif /* CONFIG_SPL_BUILD */ /* * Turn off I-cache and invalidate it */ icache_disable(); invalidate_icache_all(); /* * turn off D-cache * dcache_disable() in turn flushes the d-cache and disables MMU */ dcache_disable(); v7_outer_cache_disable(); /* * After D-cache is flushed and before it is disabled there may * be some new valid entries brought into the cache. We are sure * that these lines are not dirty and will not affect our execution. * (because unwinding the call-stack and setting a bit in CP15 SCTRL * is all we did during this. We have not pushed anything on to the * stack. Neither have we affected any static data) * So just invalidate the entire d-cache again to avoid coherency * problems for kernel */ invalidate_dcache_all(); /* * Some CPU need more cache attention before starting the kernel. */ cpu_cache_initialization(); return 0; }