nrf5: Comment the flash loader
Change-Id: Ia84b5b8ede53f59299a02dc6163d6bbaa31e0fbd Signed-off-by: Aurélien Martin <martaurel@gmail.com> Reviewed-on: http://openocd.zylin.com/5272 Tested-by: jenkins Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
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@ -35,24 +35,35 @@
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.global _start
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.global _start
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_start:
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_start:
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wait_fifo:
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wait_fifo:
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// Kick the watchdog
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str r6, [r7, #0]
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str r6, [r7, #0]
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// Load write pointer
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ldr r5, [r1, #0]
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ldr r5, [r1, #0]
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// Abort if it is NULL
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cmp r5, #0
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cmp r5, #0
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beq.n exit
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beq.n exit
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// Load read pointer
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ldr r4, [r1, #4]
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ldr r4, [r1, #4]
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// Continue waiting if it equals the write pointer
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cmp r4, r5
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cmp r4, r5
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beq.n wait_fifo
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beq.n wait_fifo
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// Copy one word from buffer to target, and increment pointers
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ldmia r4!, {r5}
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ldmia r4!, {r5}
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stmia r3!, {r5}
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stmia r3!, {r5}
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// If at end of buffer, wrap back to buffer start
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cmp r4, r2
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cmp r4, r2
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bcc.n no_wrap
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bcc.n no_wrap
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mov r4, r1
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mov r4, r1
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adds r4, #8
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adds r4, #8
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no_wrap:
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no_wrap:
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// Update read pointer inside the buffer
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str r4, [r1, #4]
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str r4, [r1, #4]
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// Deduce the word transferred from the byte count
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subs r0, #4
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subs r0, #4
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// Start again
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bne.n wait_fifo
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bne.n wait_fifo
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exit:
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exit:
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// Wait for OpenOCD
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bkpt #0x00
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bkpt #0x00
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.pool
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.pool
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