diff --git a/include/lib/cpus/aarch64/cortex_chaberton.h b/include/lib/cpus/aarch64/cortex_chaberton.h new file mode 100644 index 000000000..8f10b6876 --- /dev/null +++ b/include/lib/cpus/aarch64/cortex_chaberton.h @@ -0,0 +1,23 @@ +/* + * Copyright (c) 2023, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef CORTEX_CHABERTON_H +#define CORTEX_CHABERTON_H + +#define CORTEX_CHABERTON_MIDR U(0x410FD870) + +/******************************************************************************* + * CPU Extended Control register specific definitions + ******************************************************************************/ +#define CORTEX_CHABERTON_CPUECTLR_EL1 S3_0_C15_C1_4 + +/******************************************************************************* + * CPU Power Control register specific definitions + ******************************************************************************/ +#define CORTEX_CHABERTON_CPUPWRCTLR_EL1 S3_0_C15_C2_7 +#define CORTEX_CHABERTON_CPUPWRCTLR_EL1_CORE_PWRDN_BIT U(1) + +#endif /* CORTEX_CHABERTON_H */ diff --git a/lib/cpus/aarch64/cortex_chaberton.S b/lib/cpus/aarch64/cortex_chaberton.S new file mode 100644 index 000000000..2c47bd381 --- /dev/null +++ b/lib/cpus/aarch64/cortex_chaberton.S @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2023, Arm Limited. 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 Chaberton must be compiled with HW_ASSISTED_COHERENCY enabled" +#endif + +/* 64-bit only core */ +#if CTX_INCLUDE_AARCH32_REGS == 1 +#error "Cortex Chaberton supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" +#endif + +func cortex_chaberton_reset_func + /* Disable speculative loads */ + msr SSBS, xzr + isb + ret +endfunc cortex_chaberton_reset_func + + /* ---------------------------------------------------- + * HW will do the cache maintenance while powering down + * ---------------------------------------------------- + */ +func cortex_chaberton_core_pwr_dwn + /* --------------------------------------------------- + * Enable CPU power down bit in power control register + * --------------------------------------------------- + */ + mrs x0, CORTEX_CHABERTON_CPUPWRCTLR_EL1 + orr x0, x0, #CORTEX_CHABERTON_CPUPWRCTLR_EL1_CORE_PWRDN_BIT + msr CORTEX_CHABERTON_CPUPWRCTLR_EL1, x0 + isb + ret +endfunc cortex_chaberton_core_pwr_dwn + +#if REPORT_ERRATA +/* + * Errata printing function for Cortex Chaberton. Must follow AAPCS. + */ +func cortex_chaberton_errata_report + ret +endfunc cortex_chaberton_errata_report +#endif + + /* --------------------------------------------- + * This function provides Cortex Chaberton 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_chaberton_regs, "aS" +cortex_chaberton_regs: /* The ascii list of register names to be reported */ + .asciz "cpuectlr_el1", "" + +func cortex_chaberton_cpu_reg_dump + adr x6, cortex_chaberton_regs + mrs x8, CORTEX_CHABERTON_CPUECTLR_EL1 + ret +endfunc cortex_chaberton_cpu_reg_dump + +declare_cpu_ops cortex_chaberton, CORTEX_CHABERTON_MIDR, \ + cortex_chaberton_reset_func, \ + cortex_chaberton_core_pwr_dwn diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk index e5091c3b3..728225ae3 100644 --- a/plat/arm/board/fvp/platform.mk +++ b/plat/arm/board/fvp/platform.mk @@ -198,7 +198,8 @@ else lib/cpus/aarch64/cortex_hunter.S \ lib/cpus/aarch64/cortex_hunter_elp_arm.S \ lib/cpus/aarch64/cortex_x2.S \ - lib/cpus/aarch64/neoverse_poseidon.S + lib/cpus/aarch64/neoverse_poseidon.S \ + lib/cpus/aarch64/cortex_chaberton.S endif # AArch64/AArch32 cores FVP_CPU_LIBS += lib/cpus/aarch64/cortex_a55.S \