From db5a79460315bd12dedee5f964cd72f3a534ecb2 Mon Sep 17 00:00:00 2001 From: Atish Patra Date: Tue, 17 Mar 2020 18:11:42 -0700 Subject: RISC-V: Add SBI HSM extension definitions SBI specification defines HSM extension that allows to start/stop a hart by a supervisor anytime. The specification is available at https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc Add those definitions here. Signed-off-by: Atish Patra Reviewed-by: Anup Patel Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/sbi.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/riscv/include') diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 2bbfd6bada93..653edb25d495 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -26,6 +26,7 @@ enum sbi_ext_id { SBI_EXT_TIME = 0x54494D45, SBI_EXT_IPI = 0x735049, SBI_EXT_RFENCE = 0x52464E43, + SBI_EXT_HSM = 0x48534D, }; enum sbi_ext_base_fid { @@ -56,6 +57,19 @@ enum sbi_ext_rfence_fid { SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID, }; +enum sbi_ext_hsm_fid { + SBI_EXT_HSM_HART_START = 0, + SBI_EXT_HSM_HART_STOP, + SBI_EXT_HSM_HART_STATUS, +}; + +enum sbi_hsm_hart_status { + SBI_HSM_HART_STATUS_STARTED = 0, + SBI_HSM_HART_STATUS_STOPPED, + SBI_HSM_HART_STATUS_START_PENDING, + SBI_HSM_HART_STATUS_STOP_PENDING, +}; + #define SBI_SPEC_VERSION_DEFAULT 0x1 #define SBI_SPEC_VERSION_MAJOR_SHIFT 24 #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f -- cgit v1.2.3