blob: 206dd60eed7719cd5bb9013b57cca628bb99a8c6 [file] [log] [blame]
/*
* Semihosting Console Test
*
* Copyright (c) 2019 Linaro Ltd
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdint.h>
#include <minilib.h>
#define SYS_READC 0x7
uintptr_t __semi_call(uintptr_t type, uintptr_t arg0)
{
register uintptr_t t asm("r0") = type;
register uintptr_t a0 asm("r1") = arg0;
#ifdef __thumb__
# define SVC "svc 0xab"
#else
# define SVC "svc 0x123456"
#endif
asm(SVC : "=r" (t)
: "r" (t), "r" (a0));
return t;
}
int main(void)
{
char c;
ml_printf("Semihosting Console Test\n");
ml_printf("hit X to exit:");
do {
c = __semi_call(SYS_READC, 0);
__sys_outc(c);
} while (c != 'X');
return 0;
}