diff options
Diffstat (limited to 'arch/riscv/include/asm/sbi.h')
| -rw-r--r-- | arch/riscv/include/asm/sbi.h | 163 |
1 files changed, 96 insertions, 67 deletions
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index ced57defdd..3595ee8bf7 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2015 Regents of the University of California + * Copyright (c) 2020 Western Digital Corporation or its affiliates. * * Taken from Linux arch/riscv/include/asm/sbi.h */ @@ -10,85 +11,113 @@ #include <linux/types.h> -#define SBI_SET_TIMER 0 -#define SBI_CONSOLE_PUTCHAR 1 -#define SBI_CONSOLE_GETCHAR 2 -#define SBI_CLEAR_IPI 3 -#define SBI_SEND_IPI 4 -#define SBI_REMOTE_FENCE_I 5 -#define SBI_REMOTE_SFENCE_VMA 6 -#define SBI_REMOTE_SFENCE_VMA_ASID 7 -#define SBI_SHUTDOWN 8 +enum sbi_ext_id { +#ifdef CONFIG_SBI_V01 + SBI_EXT_0_1_SET_TIMER = 0x0, + SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1, + SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2, + SBI_EXT_0_1_CLEAR_IPI = 0x3, + SBI_EXT_0_1_SEND_IPI = 0x4, + SBI_EXT_0_1_REMOTE_FENCE_I = 0x5, + SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6, + SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7, + SBI_EXT_0_1_SHUTDOWN = 0x8, +#endif + SBI_EXT_BASE = 0x10, + SBI_EXT_TIME = 0x54494D45, + SBI_EXT_IPI = 0x735049, + SBI_EXT_RFENCE = 0x52464E43, +}; -#define SBI_CALL(which, arg0, arg1, arg2) ({ \ - register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0); \ - register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1); \ - register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2); \ - register uintptr_t a7 asm ("a7") = (uintptr_t)(which); \ - asm volatile ("ecall" \ - : "+r" (a0) \ - : "r" (a1), "r" (a2), "r" (a7) \ - : "memory"); \ - a0; \ -}) +enum sbi_ext_base_fid { + SBI_EXT_BASE_GET_SPEC_VERSION = 0, + SBI_EXT_BASE_GET_IMP_ID, + SBI_EXT_BASE_GET_IMP_VERSION, + SBI_EXT_BASE_PROBE_EXT, + SBI_EXT_BASE_GET_MVENDORID, + SBI_EXT_BASE_GET_MARCHID, + SBI_EXT_BASE_GET_MIMPID, +}; -/* Lazy implementations until SBI is finalized */ -#define SBI_CALL_0(which) SBI_CALL(which, 0, 0, 0) -#define SBI_CALL_1(which, arg0) SBI_CALL(which, arg0, 0, 0) -#define SBI_CALL_2(which, arg0, arg1) SBI_CALL(which, arg0, arg1, 0) +enum sbi_ext_time_fid { + SBI_EXT_TIME_SET_TIMER = 0, +}; -static inline void sbi_console_putchar(int ch) -{ - SBI_CALL_1(SBI_CONSOLE_PUTCHAR, ch); -} +enum sbi_ext_ipi_fid { + SBI_EXT_IPI_SEND_IPI = 0, +}; -static inline int sbi_console_getchar(void) -{ - return SBI_CALL_0(SBI_CONSOLE_GETCHAR); -} +enum sbi_ext_rfence_fid { + SBI_EXT_RFENCE_REMOTE_FENCE_I = 0, + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA, + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID, +}; -static inline void sbi_set_timer(uint64_t stime_value) -{ -#if __riscv_xlen == 32 - SBI_CALL_2(SBI_SET_TIMER, stime_value, stime_value >> 32); +#ifdef CONFIG_SBI_V01 +#define SBI_EXT_SET_TIMER SBI_EXT_0_1_SET_TIMER +#define SBI_FID_SET_TIMER 0 +#define SBI_EXT_SEND_IPI SBI_EXT_0_1_SEND_IPI +#define SBI_FID_SEND_IPI 0 +#define SBI_EXT_REMOTE_FENCE_I SBI_EXT_0_1_REMOTE_FENCE_I +#define SBI_FID_REMOTE_FENCE_I 0 +#define SBI_EXT_REMOTE_SFENCE_VMA SBI_EXT_0_1_REMOTE_SFENCE_VMA +#define SBI_FID_REMOTE_SFENCE_VMA 0 +#define SBI_EXT_REMOTE_SFENCE_VMA_ASID SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID +#define SBI_FID_REMOTE_SFENCE_VMA_ASID 0 #else - SBI_CALL_1(SBI_SET_TIMER, stime_value); +#define SBI_EXT_SET_TIMER SBI_EXT_TIME +#define SBI_FID_SET_TIMER SBI_EXT_TIME_SET_TIMER +#define SBI_EXT_SEND_IPI SBI_EXT_IPI +#define SBI_FID_SEND_IPI SBI_EXT_IPI_SEND_IPI +#define SBI_EXT_REMOTE_FENCE_I SBI_EXT_RFENCE +#define SBI_FID_REMOTE_FENCE_I SBI_EXT_RFENCE_REMOTE_FENCE_I +#define SBI_EXT_REMOTE_SFENCE_VMA SBI_EXT_RFENCE +#define SBI_FID_REMOTE_SFENCE_VMA SBI_EXT_RFENCE_REMOTE_SFENCE_VMA +#define SBI_EXT_REMOTE_SFENCE_VMA_ASID SBI_EXT_RFENCE +#define SBI_FID_REMOTE_SFENCE_VMA_ASID SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID #endif -} -static inline void sbi_shutdown(void) -{ - SBI_CALL_0(SBI_SHUTDOWN); -} +#define SBI_SPEC_VERSION_DEFAULT 0x1 +#define SBI_SPEC_VERSION_MAJOR_SHIFT 24 +#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f +#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff -static inline void sbi_clear_ipi(void) -{ - SBI_CALL_0(SBI_CLEAR_IPI); -} +/* SBI return error codes */ +#define SBI_SUCCESS 0 +#define SBI_ERR_FAILURE -1 +#define SBI_ERR_NOT_SUPPORTED -2 +#define SBI_ERR_INVALID_PARAM -3 +#define SBI_ERR_DENIED -4 +#define SBI_ERR_INVALID_ADDRESS -5 -static inline void sbi_send_ipi(const unsigned long *hart_mask) -{ - SBI_CALL_1(SBI_SEND_IPI, hart_mask); -} +extern unsigned long sbi_spec_version; +struct sbiret { + long error; + long value; +}; -static inline void sbi_remote_fence_i(const unsigned long *hart_mask) -{ - SBI_CALL_1(SBI_REMOTE_FENCE_I, hart_mask); -} +struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, + unsigned long arg1, unsigned long arg2, + unsigned long arg3, unsigned long arg4, + unsigned long arg5); -static inline void sbi_remote_sfence_vma(const unsigned long *hart_mask, - unsigned long start, - unsigned long size) -{ - SBI_CALL_1(SBI_REMOTE_SFENCE_VMA, hart_mask); -} +#ifdef CONFIG_SBI_V01 +void sbi_console_putchar(int ch); +int sbi_console_getchar(void); +void sbi_clear_ipi(void); +void sbi_shutdown(void); +#endif +void sbi_set_timer(uint64_t stime_value); +void sbi_send_ipi(const unsigned long *hart_mask); +void sbi_remote_fence_i(const unsigned long *hart_mask); +void sbi_remote_sfence_vma(const unsigned long *hart_mask, + unsigned long start, + unsigned long size); +void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, + unsigned long start, + unsigned long size, + unsigned long asid); -static inline void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, - unsigned long start, - unsigned long size, - unsigned long asid) -{ - SBI_CALL_1(SBI_REMOTE_SFENCE_VMA_ASID, hart_mask); -} +int sbi_probe_extension(int ext); #endif |