mirror of
https://github.com/RT-Thread/rt-thread.git
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127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*
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* Copyright (C) 2015 Regents of the University of California
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*/
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#ifndef _ASM_RISCV_SBI_H
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#define _ASM_RISCV_SBI_H
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#include <asm/sbidef.h>
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#include <sys/types.h>
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#define SBI_CALL(which, arg0, arg1, arg2) \
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({ \
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register uintptr_t a0 asm("a0") = (uintptr_t)(arg0); \
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register uintptr_t a1 asm("a1") = (uintptr_t)(arg1); \
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register uintptr_t a2 asm("a2") = (uintptr_t)(arg2); \
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register uintptr_t a7 asm("a7") = (uintptr_t)(which); \
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asm volatile("ecall" \
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: "+r"(a0) \
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: "r"(a1), "r"(a2), "r"(a7) \
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: "memory"); \
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a0; \
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})
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/* Lazy implementations until SBI is finalized */
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#define SBI_CALL_0(which) SBI_CALL(which, 0, 0, 0)
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#define SBI_CALL_1(which, arg0) SBI_CALL(which, arg0, 0, 0)
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#define SBI_CALL_2(which, arg0, arg1) \
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SBI_CALL(which, arg0, arg1, 0)
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#define SBI_CALL_3(which, arg0, arg1, arg2) \
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SBI_CALL(which, arg0, arg1, arg2)
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static inline void sbi_console_putstr(char *str)
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{
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// FIXME: machine mode cannot access `str`
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// if `str` is a virtual address. So we use
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// SBI_CONSOLE_PUTCHAR to implement this function.
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while (*str != '\0') {
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SBI_CALL_1(SBI_CONSOLE_PUTCHAR, *str++);
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}
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}
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static inline uintptr_t sbi_sd_write(
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unsigned int mem_address, unsigned int num_of_blocks,
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unsigned int block_id)
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{
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return SBI_CALL_3(
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SBI_SD_WRITE, mem_address, num_of_blocks, block_id);
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}
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static inline uintptr_t sbi_sd_read(
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unsigned int mem_address, unsigned int num_of_blocks,
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unsigned int block_id)
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{
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return SBI_CALL_3(
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SBI_SD_READ, mem_address, num_of_blocks, block_id);
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}
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static inline void sbi_console_putchar(int ch)
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{
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SBI_CALL_1(SBI_CONSOLE_PUTCHAR, ch);
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}
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static inline int sbi_console_getchar(void)
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{
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return SBI_CALL_0(SBI_CONSOLE_GETCHAR);
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}
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static inline void sbi_set_timer(uint64_t stime_value)
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{
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#if __riscv_xlen == 32
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SBI_CALL_2(SBI_SET_TIMER, stime_value, stime_value >> 32);
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#else
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SBI_CALL_1(SBI_SET_TIMER, stime_value);
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#endif
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}
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static inline void sbi_shutdown(void) { SBI_CALL_0(SBI_SHUTDOWN); }
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static inline void sbi_clear_ipi(void)
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{
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SBI_CALL_0(SBI_CLEAR_IPI);
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}
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static inline void sbi_send_ipi(const unsigned long *hart_mask)
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{
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SBI_CALL_1(SBI_SEND_IPI, hart_mask);
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}
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static inline void sbi_remote_fence_i(
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const unsigned long *hart_mask)
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{
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SBI_CALL_1(SBI_REMOTE_FENCE_I, hart_mask);
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}
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static inline void sbi_remote_sfence_vma(
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const unsigned long *hart_mask, unsigned long start,
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unsigned long size)
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{
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SBI_CALL_1(SBI_REMOTE_SFENCE_VMA, hart_mask);
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}
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static inline void sbi_remote_sfence_vma_asid(
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const unsigned long *hart_mask, unsigned long start,
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unsigned long size, unsigned long asid)
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{
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SBI_CALL_1(SBI_REMOTE_SFENCE_VMA_ASID, hart_mask);
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}
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static inline void sbi_net_write(char * buffer, int length) {
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SBI_CALL_2(SBI_NET_WRITE, buffer, length);
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}
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static inline void sbi_net_read() {
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SBI_CALL_0(SBI_NET_READ);
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}
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#endif
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