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https://github.com/riscv-software-src/opensbi.git
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a9cffd6532
As the the "Console Putchar" extension is already legacy and may be removed in the furture. So replace it with the SBI v2.0 "DBCN" extension. Signed-off-by: Inochi Amaoto <inochiama@outlook.com> Reviewed-by: Anup Patel <anup@brainfault.org>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#include <sbi/sbi_ecall_interface.h>
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#include <sbi/sbi_string.h>
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struct sbiret {
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unsigned long error;
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unsigned long value;
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};
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struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
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unsigned long arg1, unsigned long arg2,
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unsigned long arg3, unsigned long arg4,
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unsigned long arg5)
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{
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struct sbiret ret;
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register unsigned long a0 asm ("a0") = (unsigned long)(arg0);
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register unsigned long a1 asm ("a1") = (unsigned long)(arg1);
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register unsigned long a2 asm ("a2") = (unsigned long)(arg2);
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register unsigned long a3 asm ("a3") = (unsigned long)(arg3);
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register unsigned long a4 asm ("a4") = (unsigned long)(arg4);
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register unsigned long a5 asm ("a5") = (unsigned long)(arg5);
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register unsigned long a6 asm ("a6") = (unsigned long)(fid);
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register unsigned long a7 asm ("a7") = (unsigned long)(ext);
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asm volatile ("ecall"
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: "+r" (a0), "+r" (a1)
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: "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r" (a6), "r" (a7)
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: "memory");
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ret.error = a0;
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ret.value = a1;
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return ret;
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}
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static inline void sbi_ecall_console_puts(const char *str)
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{
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sbi_ecall(SBI_EXT_DBCN, SBI_EXT_DBCN_CONSOLE_WRITE,
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sbi_strlen(str), (unsigned long)str, 0, 0, 0, 0);
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}
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#define wfi() \
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do { \
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__asm__ __volatile__("wfi" ::: "memory"); \
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} while (0)
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void test_main(unsigned long a0, unsigned long a1)
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{
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sbi_ecall_console_puts("\nTest payload running\n");
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while (1)
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wfi();
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}
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