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authorNicolas Pitre <nicolas.pitre@linaro.org>2013-05-29 16:57:30 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-06-05 23:32:24 +0100
commit275236797916924103e133e3d7a7ea777c951273 (patch)
tree60d7703653b50684b221689f0ff8d6463bf716f0 /arch/arm/boot
parentd683b96b072dc4680fc74964eca77e6a23d1fa6e (diff)
downloadvexpress-lsk-275236797916924103e133e3d7a7ea777c951273.tar.gz
ARM: 7737/1: fix kernel decompressor compilation error with CONFIG_DEBUG_SEMIHOSTING
Selecting this option produces: AS arch/arm/boot/compressed/debug.o arch/arm/boot/compressed/debug.S:4:33: fatal error: mach/debug-macro.S: No such file or directory compilation terminated. make[3]: *** [arch/arm/boot/compressed/debug.o] Error 1 The semihosting support cannot be modelled into a senduart macro as it requires memory space for argument passing. So the CONFIG_DEBUG_LL_INCLUDE may not have any sensible value and the include directive should be omitted. While at it, let's add proper semihosting output support to the decompressor. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/boot')
-rw-r--r--arch/arm/boot/compressed/debug.S28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/debug.S b/arch/arm/boot/compressed/debug.S
index 6e8382d5b7a..5392ee63338 100644
--- a/arch/arm/boot/compressed/debug.S
+++ b/arch/arm/boot/compressed/debug.S
@@ -1,6 +1,8 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
+#ifndef CONFIG_DEBUG_SEMIHOSTING
+
#include CONFIG_DEBUG_LL_INCLUDE
ENTRY(putc)
@@ -10,3 +12,29 @@ ENTRY(putc)
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 )
+ THUMB( svc #0xab )
+ 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