diff --git a/include/lib/cpus/aarch64/neoverse_zeus.h b/include/lib/cpus/aarch64/neoverse_zeus.h new file mode 100644 index 0000000..f094727 --- /dev/null +++ b/include/lib/cpus/aarch64/neoverse_zeus.h @@ -0,0 +1,23 @@ +/* + * Copyright (c) 2019, ARM Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef NEOVERSE_ZEUS_H +#define NEOVERSE_ZEUS_H + +#define NEOVERSE_ZEUS_MIDR U(0x410FD400) + +/******************************************************************************* + * CPU Extended Control register specific definitions. + ******************************************************************************/ +#define NEOVERSE_ZEUS_CPUECTLR_EL1 S3_0_C15_C1_4 + +/******************************************************************************* + * CPU Power Control register specific definitions + ******************************************************************************/ +#define NEOVERSE_ZEUS_CPUPWRCTLR_EL1 S3_0_C15_C2_7 +#define NEOVERSE_ZEUS_CPUPWRCTLR_EL1_CORE_PWRDN_BIT U(1) + +#endif /* NEOVERSE_ZEUS_H */ diff --git a/lib/cpus/aarch64/neoverse_zeus.S b/lib/cpus/aarch64/neoverse_zeus.S new file mode 100644 index 0000000..79c8b2f --- /dev/null +++ b/lib/cpus/aarch64/neoverse_zeus.S @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2019, ARM Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include +#include +#include +#include +#include + + /* --------------------------------------------- + * HW will do the cache maintenance while powering down + * --------------------------------------------- + */ +func neoverse_zeus_core_pwr_dwn + /* --------------------------------------------- + * Enable CPU power down bit in power control register + * --------------------------------------------- + */ + mrs x0, NEOVERSE_ZEUS_CPUPWRCTLR_EL1 + orr x0, x0, #NEOVERSE_ZEUS_CPUPWRCTLR_EL1_CORE_PWRDN_BIT + msr NEOVERSE_ZEUS_CPUPWRCTLR_EL1, x0 + isb + ret +endfunc neoverse_zeus_core_pwr_dwn + + /* + * Errata printing function for Neoverse Zeus. Must follow AAPCS. + */ +#if REPORT_ERRATA +func neoverse_zeus_errata_report + ret +endfunc neoverse_zeus_errata_report +#endif + + /* --------------------------------------------- + * This function provides Neoverse-Zeus 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_zeus_regs, "aS" +neoverse_zeus_regs: /* The ascii list of register names to be reported */ + .asciz "cpuectlr_el1", "" + +func neoverse_zeus_cpu_reg_dump + adr x6, neoverse_zeus_regs + mrs x8, NEOVERSE_ZEUS_CPUECTLR_EL1 + ret +endfunc neoverse_zeus_cpu_reg_dump + +declare_cpu_ops neoverse_zeus, NEOVERSE_ZEUS_MIDR, \ + CPU_NO_RESET_FUNC, \ + neoverse_zeus_core_pwr_dwn diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk index 8e69399..61a3734 100644 --- a/plat/arm/board/fvp/platform.mk +++ b/plat/arm/board/fvp/platform.mk @@ -104,7 +104,9 @@ lib/cpus/aarch64/cortex_a75.S \ lib/cpus/aarch64/cortex_a76.S \ lib/cpus/aarch64/neoverse_n1.S \ - lib/cpus/aarch64/cortex_deimos.S + lib/cpus/aarch64/cortex_deimos.S \ + lib/cpus/aarch64/neoverse_zeus.S + else FVP_CPU_LIBS += lib/cpus/aarch32/cortex_a32.S endif