| /* 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 |
