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riscv: add support for supervisor binary interface (SBI)

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SBI is runtime service for OS. For an introduction, please refer to
https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.md

Change-Id: Ib6c1f21d2f085f02208305dc4e3a0f970d400c27
Signed-off-by: Xiang Wang <wxjstz@126.com>
Reviewed-on: https://review.coreboot.org/28096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Xiang Wang 2018-08-15 16:27:05 +08:00 • committed by Patrick Georgi
commit 22e0c560bb
5 changed files with 187 additions and 1 deletions
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37
src/arch/riscv/include/sbi.h Normal file
View file

@ -0,0 +1,37 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 HardenedLinux
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef RISCV_SBI_H
#define RISCV_SBI_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 IPI_SOFT 1
#define IPI_FENCE_I 2
#define IPI_SFENCE_VMA 4
#define IPI_SFENCE_VMA_ASID 8
#define IPI_SHUTDOWN 16
void handle_sbi(trapframe *tf);
#endif /* RISCV_SBI_H */

8
src/arch/riscv/include/vm.h
View file

@ -102,6 +102,14 @@ DEFINE_MPRV_WRITE(mprv_write_u64, uint64_t, sd)
DEFINE_MPRV_WRITE(mprv_write_long, long, sd)
DEFINE_MPRV_WRITE(mprv_write_ulong, unsigned long, sd)
#if __riscv_xlen == 32
DEFINE_MPRV_READ(mprv_read_uintptr_t, uintptr_t, lw)
DEFINE_MPRV_READ(mprv_write_uintptr_t, uintptr_t, sw)
#elif __riscv_xlen == 64
DEFINE_MPRV_READ(mprv_read_uintptr_t, uintptr_t, ld)
DEFINE_MPRV_READ(mprv_write_uintptr_t, uintptr_t, sd)
#endif
#undef DEFINE_MPRV_READ_FLAGS
#undef DEFINE_MPRV_READ
#undef DEFINE_MPRV_READ_MXR