| Govindraj Raja | 7beabfd | 2023-06-27 10:07:23 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2023, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
| 9 | #include <common/bl_common.h> |
| 10 | #include <neoverse_hermes.h> |
| 11 | #include <cpu_macros.S> |
| 12 | #include <plat_macros.S> |
| 13 | |
| 14 | /* Hardware handled coherency */ |
| 15 | #if HW_ASSISTED_COHERENCY == 0 |
| 16 | #error "Neoverse Hermes must be compiled with HW_ASSISTED_COHERENCY enabled" |
| 17 | #endif |
| 18 | |
| 19 | /* 64-bit only core */ |
| 20 | #if CTX_INCLUDE_AARCH32_REGS == 1 |
| 21 | #error "Neoverse Hermes supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| 22 | #endif |
| 23 | |
| 24 | cpu_reset_func_start neoverse_hermes |
| 25 | /* Disable speculative loads */ |
| 26 | msr SSBS, xzr |
| 27 | cpu_reset_func_end neoverse_hermes |
| 28 | |
| 29 | /* ---------------------------------------------------- |
| 30 | * HW will do the cache maintenance while powering down |
| 31 | * ---------------------------------------------------- |
| 32 | */ |
| 33 | func neoverse_hermes_core_pwr_dwn |
| 34 | /* --------------------------------------------------- |
| 35 | * Enable CPU power down bit in power control register |
| 36 | * --------------------------------------------------- |
| 37 | */ |
| 38 | sysreg_bit_set NEOVERSE_HERMES_CPUPWRCTLR_EL1, NEOVERSE_HERMES_CPUPWRCTLR_EL1_CORE_PWRDN_BIT |
| 39 | isb |
| 40 | ret |
| 41 | endfunc neoverse_hermes_core_pwr_dwn |
| 42 | |
| 43 | errata_report_shim neoverse_hermes |
| 44 | |
| 45 | /* --------------------------------------------- |
| 46 | * This function provides Neoverse Hermes specific |
| 47 | * register information for crash reporting. |
| 48 | * It needs to return with x6 pointing to |
| 49 | * a list of register names in ascii and |
| 50 | * x8 - x15 having values of registers to be |
| 51 | * reported. |
| 52 | * --------------------------------------------- |
| 53 | */ |
| 54 | .section .rodata.neoverse_hermes_regs, "aS" |
| 55 | neoverse_hermes_regs: /* The ascii list of register names to be reported */ |
| 56 | .asciz "cpuectlr_el1", "" |
| 57 | |
| 58 | func neoverse_hermes_cpu_reg_dump |
| 59 | adr x6, neoverse_hermes_regs |
| 60 | mrs x8, NEOVERSE_HERMES_CPUECTLR_EL1 |
| 61 | ret |
| 62 | endfunc neoverse_hermes_cpu_reg_dump |
| 63 | |
| 64 | declare_cpu_ops neoverse_hermes, NEOVERSE_HERMES_MIDR, \ |
| 65 | neoverse_hermes_reset_func, \ |
| 66 | neoverse_hermes_core_pwr_dwn |