LXR linux/arch/arm/boot/compressed/debug.S

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#include <linux/linkage.h>
   3#include <asm/assembler.h>
   4
   5#ifndef CONFIG_DEBUG_SEMIHOSTING
   6
   7#include CONFIG_DEBUG_LL_INCLUDE
   8
   9ENTRY(putc)
  10        addruart r1, r2, r3
  11#ifdef CONFIG_DEBUG_UART_FLOW_CONTROL
  12        waituartcts r3, r1
  13#endif
  14        waituarttxrdy r3, r1
  15        senduart r0, r1
  16        busyuart r3, r1
  17        mov      pc, lr
  18ENDPROC(putc)
  19
  20#else
  21
  22ENTRY(putc)
  23        adr     r1, 1f
  24        ldmia   r1, {r2, r3}
  25        add     r2, r2, r1
  26        ldr     r1, [r2, r3]
  27        strb    r0, [r1]
  28        mov     r0, #0x03               @ SYS_WRITEC
  29   ARM( svc     #0x123456       )
  30#ifdef CONFIG_CPU_V7M
  31 THUMB( bkpt    #0xab           )
  32#else
  33 THUMB( svc     #0xab           )
  34#endif
  35        mov     pc, lr
  36        .align  2
  371:      .word   _GLOBAL_OFFSET_TABLE_ - .
  38        .word   semi_writec_buf(GOT)
  39ENDPROC(putc)
  40
  41        .bss
  42        .global semi_writec_buf
  43        .type   semi_writec_buf, %object
  44semi_writec_buf:
  45        .space  4
  46        .size   semi_writec_buf, 4
  47
  48#endif
  49