Changes in boot/arch/arm32/src/asm.S [b5a3b50:cfeb368] in mainline
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boot/arch/arm32/src/asm.S
rb5a3b50 rcfeb368 61 61 # 62 62 63 #if defined(MACHINE_gta02) 63 # 64 # r0 is kernel entry point 65 # r1 is pointer to the bootinfo structure 64 66 65 67 #define CP15_C1_IC 12 68 #define CP15_C1_BP 11 66 69 #define CP15_C1_DC 2 67 #define CP15_C7_SEG_SHIFT 568 #define CP15_C7_SEG_SIZE 369 #define CP15_C7_IDX_SHIFT 2670 71 70 # Disable I-cache and D-cache before the kernel is started. 72 71 mrc p15, 0, r4, c1, c0, 0 73 72 bic r4, r4, #(1 << CP15_C1_DC) 74 73 bic r4, r4, #(1 << CP15_C1_IC) 74 bic r4, r4, #(1 << CP15_C1_BP) 75 75 mcr p15, 0, r4, c1, c0, 0 76 77 78 #Wait for the operations to complete 79 #ifdef PROCESSOR_ARCH_armv7_a 80 dsb 81 #else 82 #cp15 dsb, r4 is ignored (should be zero) 83 mcr p15, 0, r4, c7, c10, 4 84 #endif 85 86 # Clean ICache and BPredictors, r4 ignored (SBZ) 87 mcr p15, 0, r4, c7, c5, 0 88 nop 89 90 #Wait for the operations to complete 91 #ifdef PROCESSOR_ARCH_armv7_a 92 isb 93 nop 94 #else 95 # cp15 isb 96 mcr p15, 0, r4, c7, c5, 4 97 nop 98 #endif 99 100 #TODO:This should not be necessary 101 102 #if defined(MACHINE_gta02) 103 104 #define CP15_C7_SEG_SHIFT 5 105 #define CP15_C7_SEG_SIZE 3 106 #define CP15_C7_IDX_SHIFT 26 76 107 77 108 # Now clean D-cache to guarantee coherency between I-cache and D-cache.
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