95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
|
/* 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
|