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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
| commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
| tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/boot/compressed/debug.S | |
| parent | Initial commit. (diff) | |
| download | linux-upstream.tar.xz linux-upstream.zip | |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/boot/compressed/debug.S')
| -rw-r--r-- | arch/arm/boot/compressed/debug.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/debug.S b/arch/arm/boot/compressed/debug.S new file mode 100644 index 000000000..fac40a717 --- /dev/null +++ b/arch/arm/boot/compressed/debug.S @@ -0,0 +1,48 @@ +/* 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 +#ifdef CONFIG_DEBUG_UART_FLOW_CONTROL + waituartcts r3, r1 +#endif + waituarttxrdy 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 |