diff options
Diffstat (limited to 'lib/cpus/aarch64/cortex_hayes.S')
-rw-r--r-- | lib/cpus/aarch64/cortex_hayes.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/cortex_hayes.S b/lib/cpus/aarch64/cortex_hayes.S new file mode 100644 index 0000000..445a691 --- /dev/null +++ b/lib/cpus/aarch64/cortex_hayes.S @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2021, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> +#include <common/bl_common.h> +#include <cortex_hayes.h> +#include <cpu_macros.S> +#include <plat_macros.S> + +/* Hardware handled coherency */ +#if HW_ASSISTED_COHERENCY == 0 +#error "Cortex Hayes must be compiled with HW_ASSISTED_COHERENCY enabled" +#endif + +/* 64-bit only core */ +#if CTX_INCLUDE_AARCH32_REGS == 1 +#error "Cortex Hayes supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" +#endif + + /* ---------------------------------------------------- + * HW will do the cache maintenance while powering down + * ---------------------------------------------------- + */ +func cortex_hayes_core_pwr_dwn + /* --------------------------------------------------- + * Enable CPU power down bit in power control register + * --------------------------------------------------- + */ + mrs x0, CORTEX_HAYES_CPUPWRCTLR_EL1 + orr x0, x0, #CORTEX_HAYES_CPUPWRCTLR_EL1_CORE_PWRDN_BIT + msr CORTEX_HAYES_CPUPWRCTLR_EL1, x0 + isb + ret +endfunc cortex_hayes_core_pwr_dwn + + /* + * Errata printing function for Cortex Hayes. Must follow AAPCS. + */ +#if REPORT_ERRATA +func cortex_hayes_errata_report + ret +endfunc cortex_hayes_errata_report +#endif + +func cortex_hayes_reset_func + /* Disable speculative loads */ + msr SSBS, xzr + isb + ret +endfunc cortex_hayes_reset_func + + /* --------------------------------------------- + * This function provides Cortex Hayes 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_hayes_regs, "aS" +cortex_hayes_regs: /* The ascii list of register names to be reported */ + .asciz "cpuectlr_el1", "" + +func cortex_hayes_cpu_reg_dump + adr x6, cortex_hayes_regs + mrs x8, CORTEX_HAYES_CPUECTLR_EL1 + ret +endfunc cortex_hayes_cpu_reg_dump + +declare_cpu_ops cortex_hayes, CORTEX_HAYES_MIDR, \ + cortex_hayes_reset_func, \ + cortex_hayes_core_pwr_dwn |