/* * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include /* Hardware handled coherency */ #if HW_ASSISTED_COHERENCY == 0 #error "Cortex-A77 must be compiled with HW_ASSISTED_COHERENCY enabled" #endif /* 64-bit only core */ #if CTX_INCLUDE_AARCH32_REGS == 1 #error "Cortex-A77 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" #endif /* -------------------------------------------------- * Errata Workaround for Cortex A77 Errata #1508412. * This applies only to revision <= r1p0 of Cortex A77. * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: x0-x17 * -------------------------------------------------- */ func errata_a77_1508412_wa /* * Compare x0 against revision r1p0 */ mov x17, x30 bl check_errata_1508412 cbz x0, 3f /* * Compare x0 against revision r0p0 */ bl check_errata_1508412_0 cbz x0, 1f ldr x0, =0x0 msr CORTEX_A77_CPUPSELR_EL3, x0 ldr x0, =0x00E8400000 msr CORTEX_A77_CPUPOR_EL3, x0 ldr x0, =0x00FFE00000 msr CORTEX_A77_CPUPMR_EL3, x0 ldr x0, =0x4004003FF msr CORTEX_A77_CPUPCR_EL3, x0 ldr x0, =0x1 msr CORTEX_A77_CPUPSELR_EL3, x0 ldr x0, =0x00E8C00040 msr CORTEX_A77_CPUPOR_EL3, x0 ldr x0, =0x00FFE00040 msr CORTEX_A77_CPUPMR_EL3, x0 b 2f 1: ldr x0, =0x0 msr CORTEX_A77_CPUPSELR_EL3, x0 ldr x0, =0x00E8400000 msr CORTEX_A77_CPUPOR_EL3, x0 ldr x0, =0x00FF600000 msr CORTEX_A77_CPUPMR_EL3, x0 ldr x0, =0x00E8E00080 msr CORTEX_A77_CPUPOR2_EL3, x0 ldr x0, =0x00FFE000C0 msr CORTEX_A77_CPUPMR2_EL3, x0 2: ldr x0, =0x04004003FF msr CORTEX_A77_CPUPCR_EL3, x0 isb 3: ret x17 endfunc errata_a77_1508412_wa func check_errata_1508412 mov x1, #0x10 b cpu_rev_var_ls endfunc check_errata_1508412 func check_errata_1508412_0 mov x1, #0x0 b cpu_rev_var_ls endfunc check_errata_1508412_0 /* -------------------------------------------------- * Errata Workaround for Cortex A77 Errata #1800714. * This applies to revision <= r1p1 of Cortex A77. * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: x0-x17 * -------------------------------------------------- */ func errata_a77_1800714_wa /* Compare x0 against revision <= r1p1 */ mov x17, x30 bl check_errata_1800714 cbz x0, 1f /* Disable allocation of splintered pages in the L2 TLB */ mrs x1, CORTEX_A77_CPUECTLR_EL1 orr x1, x1, CORTEX_A77_CPUECTLR_EL1_BIT_53 msr CORTEX_A77_CPUECTLR_EL1, x1 isb 1: ret x17 endfunc errata_a77_1800714_wa func check_errata_1800714 /* Applies to everything <= r1p1 */ mov x1, #0x11 b cpu_rev_var_ls endfunc check_errata_1800714 /* -------------------------------------------------- * Errata Workaround for Cortex A77 Errata #1925769. * This applies to revision <= r1p1 of Cortex A77. * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: x0-x17 * -------------------------------------------------- */ func errata_a77_1925769_wa /* Compare x0 against revision <= r1p1 */ mov x17, x30 bl check_errata_1925769 cbz x0, 1f /* Set bit 8 in ECTLR_EL1 */ mrs x1, CORTEX_A77_CPUECTLR_EL1 orr x1, x1, #CORTEX_A77_CPUECTLR_EL1_BIT_8 msr CORTEX_A77_CPUECTLR_EL1, x1 isb 1: ret x17 endfunc errata_a77_1925769_wa func check_errata_1925769 /* Applies to everything <= r1p1 */ mov x1, #0x11 b cpu_rev_var_ls endfunc check_errata_1925769 /* ------------------------------------------------- * The CPU Ops reset function for Cortex-A77. * Shall clobber: x0-x19 * ------------------------------------------------- */ func cortex_a77_reset_func mov x19, x30 bl cpu_get_rev_var mov x18, x0 #if ERRATA_A77_1508412 mov x0, x18 bl errata_a77_1508412_wa #endif #if ERRATA_A77_1800714 mov x0, x18 bl errata_a77_1800714_wa #endif #if ERRATA_A77_1925769 mov x0, x18 bl errata_a77_1925769_wa #endif ret x19 endfunc cortex_a77_reset_func /* --------------------------------------------- * HW will do the cache maintenance while powering down * --------------------------------------------- */ func cortex_a77_core_pwr_dwn /* --------------------------------------------- * Enable CPU power down bit in power control register * --------------------------------------------- */ mrs x0, CORTEX_A77_CPUPWRCTLR_EL1 orr x0, x0, #CORTEX_A77_CPUPWRCTLR_EL1_CORE_PWRDN_BIT msr CORTEX_A77_CPUPWRCTLR_EL1, x0 isb ret endfunc cortex_a77_core_pwr_dwn #if REPORT_ERRATA /* * Errata printing function for Cortex-A77. Must follow AAPCS. */ func cortex_a77_errata_report stp x8, x30, [sp, #-16]! bl cpu_get_rev_var mov x8, x0 /* * Report all errata. The revision-variant information is passed to * checking functions of each errata. */ report_errata ERRATA_A77_1508412, cortex_a77, 1508412 report_errata ERRATA_A77_1800714, cortex_a77, 1800714 report_errata ERRATA_A77_1925769, cortex_a77, 1925769 ldp x8, x30, [sp], #16 ret endfunc cortex_a77_errata_report #endif /* --------------------------------------------- * This function provides Cortex-A77 specific * register information for crash reporting. * It needs to return with x6 pointing to * a list of register names in ascii and * x8 - x15 having values of registers to be * reported. * --------------------------------------------- */ .section .rodata.cortex_a77_regs, "aS" cortex_a77_regs: /* The ascii list of register names to be reported */ .asciz "cpuectlr_el1", "" func cortex_a77_cpu_reg_dump adr x6, cortex_a77_regs mrs x8, CORTEX_A77_CPUECTLR_EL1 ret endfunc cortex_a77_cpu_reg_dump declare_cpu_ops cortex_a77, CORTEX_A77_MIDR, \ cortex_a77_reset_func, \ cortex_a77_core_pwr_dwn