1
2 #include <linux/linkage.h>
3 #include <asm/assembler.h>
4
5 #ifndef CONFIG_DEBUG_SEMIHOSTING
6
7 #include CONFIG_DEBUG_LL_INCLUDE
8
9 ENTRY(putc)
10 addruart r1, r2, r3
11 waituart r3, r1
12 senduart r0, r1
13 busyuart r3, r1
14 mov pc, lr
15 ENDPROC(putc)
16
17 #else
18
19 ENTRY(putc)
20 adr r1, 1f
21 ldmia r1, {r2, r3}
22 add r2, r2, r1
23 ldr r1, [r2, r3]
24 strb r0, [r1]
25 mov r0, #0x03 @ SYS_WRITEC
26 ARM( svc #0x123456 )
27 #ifdef CONFIG_CPU_V7M
28 THUMB( bkpt #0xab )
29 #else
30 THUMB( svc #0xab )
31 #endif
32 mov pc, lr
33 .align 2
34 1: .word _GLOBAL_OFFSET_TABLE_ - .
35 .word semi_writec_buf(GOT)
36 ENDPROC(putc)
37
38 .bss
39 .global semi_writec_buf
40 .type semi_writec_buf, %object
41 semi_writec_buf:
42 .space 4
43 .size semi_writec_buf, 4
44
45 #endif