Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / boot / compressed / debug.S

diff --git a/kernel/arch/arm/boot/compressed/debug.S b/kernel/arch/arm/boot/compressed/debug.S
new file mode 100644 (file)
index 0000000..5392ee6
--- /dev/null
+++ b/kernel/arch/arm/boot/compressed/debug.S
@@ -0,0 +1,40 @@
+#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       )
+ 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