diff options
Diffstat (limited to 'src/arch/arm64/cpu/cortex_a57.S')
| -rw-r--r-- | src/arch/arm64/cpu/cortex_a57.S | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/src/arch/arm64/cpu/cortex_a57.S b/src/arch/arm64/cpu/cortex_a57.S index 08c22a84fd..80707caadf 100644 --- a/src/arch/arm64/cpu/cortex_a57.S +++ b/src/arch/arm64/cpu/cortex_a57.S @@ -14,7 +14,6 @@ */ #include <arch/asm.h> -#include <arch/cache_helpers.h> #include <cpu/cortex_a57.h> ENTRY(arm64_cpu_early_setup) @@ -24,97 +23,3 @@ ENTRY(arm64_cpu_early_setup) isb ret ENDPROC(arm64_cpu_early_setup) - -/* - * CPU power down sequence as per A57/A53/A72 TRM - * - * x0 - L2 flush by HW(0) or SW(1), if system/HW driven L2 flush is supported - * - */ -#if IS_ENABLED(CONFIG_ARCH_ARM64_CORTEX_A57_POWER_DOWN_SUPPORT) -ENTRY(cortex_a57_cpu_power_down) - /* Store L2 cache flush request */ - mov x13, x0 - - /* 1. Stop allocations to our data cache */ - mrs x0, sctlr_el1 - bic x0, x0, #1 << 2 // clear SCTLR.C - msr sctlr_el1, x0 - isb - - mrs x0, sctlr_el3 - bic x0, x0, #1 << 2 // clear SCTLR.C - msr sctlr_el3, x0 - isb - - mrs x0, midr_el1 - ubfx x0, x0, #4, #12 - cmp x0, #CORTEX_A53_PN - b.eq a53 - - /* 2. Disable L2 prefetch */ - mrs x0, CPUECTLR_EL1 // CPUECTLR_EL1 - /* CPUECTLR[38], disable table walk descriptor access L2 prefetch */ - orr x0, x0, #1 << 38 - /* - * CPUECTLR[36:35] L2 instruction fetch prefetch distance - * 0 => disable instruction prefetch - */ - bic x0, x0, #3 << 35 - /* - * CPUECTLR[33:32] L2 load/store prefetch distance - * 0 => disable instruction prefetch - */ - bic x0, x0, #3 << 32 - msr CPUECTLR_EL1, x0 - - /* 3. ISB to ensure ectlr write is complete */ - isb - - /* 4. DSB to ensure prior prefetches are complete */ - dsb sy - -a53: - /* 5. Clean and invalidate L1 and L2 if X13 == 1 */ - mov x0, #DCCISW - cmp x13, #1 - bne 1f - bl flush_dcache_all - b 2f -1: - bl flush_dcache_louis -2: - - /* 6. Leave coherency, clear SMPEN */ - mrs x0, CPUECTLR_EL1 - bic x0, x0, #(1 << SMPEN_SHIFT) - msr CPUECTLR_EL1, x0 - - /* 7. Set the DBGOSDLR.DLK, Double lock control bit */ - mrs x0, osdlr_el1 - orr x0, x0, #OSDLR_DBL_LOCK_BIT - msr osdlr_el1, x0 - - /* - * 9. Execute an ISB instruction to ensure that all of the - * System register changes from the previous steps have - * been committed. - */ - isb - - /* - * 10. Execute a DSB instruction to ensure that all - * instruction cache, TLB, and branch predictor - * maintenance operations issued by any processor in the - * multiprocessor before the SMPEN bit was cleared have - * completed. - */ - dsb sy - - /* 11. wfi */ -3: wfi - - /* we never return here */ - b 3b -ENDPROC(cortex_a57_cpu_power_down) -#endif |