| /* SPDX-License-Identifier: GPL-2.0 */ | |
| #include <linux/linkage.h> | |
| #include <asm/assembler.h> | |
| #ifndef CONFIG_DEBUG_SEMIHOSTING | |
| #include CONFIG_DEBUG_LL_INCLUDE | |
| ENTRY(putc) | |
| addruart r1, r2, r3 | |
| waituart r3, r1 | |
| senduart r0, r1 | |
| busyuart r3, r1 | |
| mov pc, lr | |
| ENDPROC(putc) | |
| #else | |
| ENTRY(putc) | |
| adr r1, 1f | |
| ldmia r1, {r2, r3} | |
| add r2, r2, r1 | |
| ldr r1, [r2, r3] | |
| strb r0, [r1] | |
| mov r0, #0x03 @ SYS_WRITEC | |
| ARM( svc #0x123456 ) | |
| #ifdef CONFIG_CPU_V7M | |
| THUMB( bkpt #0xab ) | |
| #else | |
| THUMB( svc #0xab ) | |
| #endif | |
| mov pc, lr | |
| .align 2 | |
| 1: .word _GLOBAL_OFFSET_TABLE_ - . | |
| .word semi_writec_buf(GOT) | |
| ENDPROC(putc) | |
| .bss | |
| .global semi_writec_buf | |
| .type semi_writec_buf, %object | |
| semi_writec_buf: | |
| .space 4 | |
| .size semi_writec_buf, 4 | |
| #endif |