39 lines
639 B
C
39 lines
639 B
C
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/*
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* Semihosting Console Test
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*
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* Copyright (c) 2019 Linaro Ltd
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <inttypes.h>
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#include <minilib.h>
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#define SYS_READC 0x7
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uintptr_t __semi_call(uintptr_t type, uintptr_t arg0)
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{
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register uintptr_t t asm("x0") = type;
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register uintptr_t a0 asm("x1") = arg0;
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asm("hlt 0xf000"
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: "=r" (t)
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: "r" (t), "r" (a0));
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return t;
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}
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int main(void)
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{
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char c;
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ml_printf("Semihosting Console Test\n");
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ml_printf("hit X to exit:");
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do {
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c = __semi_call(SYS_READC, 0);
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__sys_outc(c);
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} while (c != 'X');
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return 0;
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}
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