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Trouble starting debugger wit secondary jtag

Daniel Ljubonic

I am having trouble starting a debugger with secondary jtag on LPC2106. I have included a proper set of instructions in 'Startup.s' to enable the secondary jtag:

; Pin definitions
PINSEL1         EQU     0xE002C004      ; PINSEL1 Address
PINSEL1_Val     EQU     0x55400000      ; Secondary JTAG

                LDR     R0, =PINSEL1
                LDR     R1, =PINSEL1_Val
                STR     R1, [R0]


This works fine for a simple test program, such as 'blinky', but not for more advanced application which uses RL-ARM RTX kernel. Such an application requires SWI_Handler from RealView Real-Time Library so I added the following code to 'Startup.s':

IMPORT  SWI_Handler

Undef_Handler   B       Undef_Handler
;SWI_Handler    B       SWI_Handler            ; Part of RTL

This however causes the communication over jtag to break for some reason and the debugger cannot start.
As soon as I remove imported SWI_Handler the debugger starts working. Of course, the application now hangs on SWI_Handler. Any thoughts why this is happening and what might be the solution to the problem?