| /* |
| * Copyright (c) 2019-2020, ARM Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <common/bl_common.h> |
| #include <neoverse_v1.h> |
| #include <cpu_macros.S> |
| #include <plat_macros.S> |
| |
| /* Hardware handled coherency */ |
| #if HW_ASSISTED_COHERENCY == 0 |
| #error "Neoverse V1 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| #endif |
| |
| /* 64-bit only core */ |
| #if CTX_INCLUDE_AARCH32_REGS == 1 |
| #error "Neoverse-V1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| #endif |
| |
| /* -------------------------------------------------- |
| * Errata Workaround for Neoverse V1 Errata #1791573. |
| * This applies to revisions r0p0 and r1p0, fixed in r1p1. |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0-x17 |
| * -------------------------------------------------- |
| */ |
| func errata_neoverse_v1_1791573_wa |
| /* Check workaround compatibility. */ |
| mov x17, x30 |
| bl check_errata_1791573 |
| cbz x0, 1f |
| |
| /* Set bit 2 in ACTLR2_EL1 */ |
| mrs x1, NEOVERSE_V1_ACTLR2_EL1 |
| orr x1, x1, #NEOVERSE_V1_ACTLR2_EL1_BIT_2 |
| msr NEOVERSE_V1_ACTLR2_EL1, x1 |
| isb |
| 1: |
| ret x17 |
| endfunc errata_neoverse_v1_1791573_wa |
| |
| func check_errata_1791573 |
| /* Applies to r0p0 and r1p0. */ |
| mov x1, #0x10 |
| b cpu_rev_var_ls |
| endfunc check_errata_1791573 |
| |
| /* --------------------------------------------- |
| * HW will do the cache maintenance while powering down |
| * --------------------------------------------- |
| */ |
| func neoverse_v1_core_pwr_dwn |
| /* --------------------------------------------- |
| * Enable CPU power down bit in power control register |
| * --------------------------------------------- |
| */ |
| mrs x0, NEOVERSE_V1_CPUPWRCTLR_EL1 |
| orr x0, x0, #NEOVERSE_V1_CPUPWRCTLR_EL1_CORE_PWRDN_BIT |
| msr NEOVERSE_V1_CPUPWRCTLR_EL1, x0 |
| isb |
| ret |
| endfunc neoverse_v1_core_pwr_dwn |
| |
| /* |
| * Errata printing function for Neoverse V1. Must follow AAPCS. |
| */ |
| #if REPORT_ERRATA |
| func neoverse_v1_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_V1_1791573, neoverse_v1, 1791573 |
| |
| ldp x8, x30, [sp], #16 |
| ret |
| endfunc neoverse_v1_errata_report |
| #endif |
| |
| func neoverse_v1_reset_func |
| mov x19, x30 |
| |
| /* Disable speculative loads */ |
| msr SSBS, xzr |
| isb |
| |
| #if ERRATA_V1_1791573 |
| mov x0, x18 |
| bl errata_neoverse_v1_1791573_wa |
| #endif |
| |
| ret x19 |
| endfunc neoverse_v1_reset_func |
| |
| /* --------------------------------------------- |
| * This function provides Neoverse-V1 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.neoverse_v1_regs, "aS" |
| neoverse_v1_regs: /* The ascii list of register names to be reported */ |
| .asciz "cpuectlr_el1", "" |
| |
| func neoverse_v1_cpu_reg_dump |
| adr x6, neoverse_v1_regs |
| mrs x8, NEOVERSE_V1_CPUECTLR_EL1 |
| ret |
| endfunc neoverse_v1_cpu_reg_dump |
| |
| declare_cpu_ops neoverse_v1, NEOVERSE_V1_MIDR, \ |
| neoverse_v1_reset_func, \ |
| neoverse_v1_core_pwr_dwn |