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- From 34a0626fc344f51cd768efecdd52628b677fb9a8 Mon Sep 17 00:00:00 2001
- From: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
- Date: Sun, 17 Mar 2019 19:28:33 +0100
- Subject: [PATCH 02/18] riscv: import the supervisor binary interface header
- file
- Import the supervisor binary interface (SBI) header file from Linux
- (arch/riscv/include/asm/sbi.h). The last change to it was in commit
- 6d60b6ee0c97 ("RISC-V: Device, timer, IRQs, and the SBI").
- Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
- Reviewed-by: Anup Patel <anup.patel@wdc.com>
- Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
- Reviewed-by: Atish Patra <atish.patra@wdc.com>
- ---
- arch/riscv/include/asm/sbi.h | 94 ++++++++++++++++++++++++++++++++++++
- 1 file changed, 94 insertions(+)
- create mode 100644 arch/riscv/include/asm/sbi.h
- diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
- new file mode 100644
- index 0000000000..ced57defdd
- --- /dev/null
- +++ b/arch/riscv/include/asm/sbi.h
- @@ -0,0 +1,94 @@
- +/* SPDX-License-Identifier: GPL-2.0 */
- +/*
- + * Copyright (C) 2015 Regents of the University of California
- + *
- + * Taken from Linux arch/riscv/include/asm/sbi.h
- + */
- +
- +#ifndef _ASM_RISCV_SBI_H
- +#define _ASM_RISCV_SBI_H
- +
- +#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
- +
- +#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; \
- +})
- +
- +/* 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)
- +
- +static inline void sbi_console_putchar(int ch)
- +{
- + SBI_CALL_1(SBI_CONSOLE_PUTCHAR, ch);
- +}
- +
- +static inline int sbi_console_getchar(void)
- +{
- + return SBI_CALL_0(SBI_CONSOLE_GETCHAR);
- +}
- +
- +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);
- +#else
- + SBI_CALL_1(SBI_SET_TIMER, stime_value);
- +#endif
- +}
- +
- +static inline void sbi_shutdown(void)
- +{
- + SBI_CALL_0(SBI_SHUTDOWN);
- +}
- +
- +static inline void sbi_clear_ipi(void)
- +{
- + SBI_CALL_0(SBI_CLEAR_IPI);
- +}
- +
- +static inline void sbi_send_ipi(const unsigned long *hart_mask)
- +{
- + SBI_CALL_1(SBI_SEND_IPI, hart_mask);
- +}
- +
- +static inline void sbi_remote_fence_i(const unsigned long *hart_mask)
- +{
- + SBI_CALL_1(SBI_REMOTE_FENCE_I, hart_mask);
- +}
- +
- +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);
- +}
- +
- +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);
- +}
- +
- +#endif
- --
- 2.21.0
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