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annotate gsm-fw/lldbg/serio.S @ 865:f5affe83ba2d

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lldbg hack (poor girl's substitute for JTAG) implemented
author Space Falcon <falcon@ivan.Harhan.ORG>
date Fri, 15 May 2015 00:02:03 +0000
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865
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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1 #include "../include/config.h"
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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2 #include "ns16550.h"
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3
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4 /* this module implements the elementary serial I/O operations */
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
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5
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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6 .text
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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7 .code 32
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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8 .globl lldbg_serial_out
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Space Falcon <falcon@ivan.Harhan.ORG>
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9 lldbg_serial_out:
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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10 ldr r2, =CONFIG_LLDBG_UART_BASE
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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11 1: ldrb r3, [r2, #NS16550_LSR]
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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12 tst r3, #NS16550_LSR_THRE
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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13 beq 1b
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Space Falcon <falcon@ivan.Harhan.ORG>
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14 strb r0, [r2, #NS16550_THR]
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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15 bx lr
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16
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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17 .globl lldbg_serial_in_poll
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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18 lldbg_serial_in_poll:
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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19 ldr r2, =CONFIG_LLDBG_UART_BASE
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
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20 ldrb r3, [r2, #NS16550_LSR]
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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21 tst r3, #NS16550_LSR_DR
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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22 ldrneb r0, [r2, #NS16550_RBR]
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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23 mvneq r0, #0
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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24 bx lr
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
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25
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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26 #if 0 // not needed currently
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Space Falcon <falcon@ivan.Harhan.ORG>
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27 .globl lldbg_serial_flush
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Space Falcon <falcon@ivan.Harhan.ORG>
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28 lldbg_serial_flush:
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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29 ldr r2, =CONFIG_LLDBG_UART_BASE
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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30 1: ldrb r3, [r2, #NS16550_LSR]
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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31 tst r3, #NS16550_LSR_TEMP
f5affe83ba2d lldbg hack (poor girl's substitute for JTAG) implemented
Space Falcon <falcon@ivan.Harhan.ORG>
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32 beq 1b
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Space Falcon <falcon@ivan.Harhan.ORG>
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33 bx lr
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34 #endif