FreeCalypso > hg > freecalypso-tools

annotate target-utils/loadagent/serextra.S @ 736:7d1df6d831e4

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libpwon: added -Pdtr and -Prts support for DUART28C
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 16 Sep 2020 03:40:51 +0000
parents 3229940734e5
children
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3229940734e5 loadagent: binary memload command implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 #include "ns16550.h"
3229940734e5 loadagent: binary memload command implemented
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2
3229940734e5 loadagent: binary memload command implemented
Mychaela Falconia <falcon@freecalypso.org>
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3 @ extra serial I/O functions for loadagent binary operations
3229940734e5 loadagent: binary memload command implemented
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4
3229940734e5 loadagent: binary memload command implemented
Mychaela Falconia <falcon@freecalypso.org>
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5 .text
3229940734e5 loadagent: binary memload command implemented
Mychaela Falconia <falcon@freecalypso.org>
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6 .code 32
3229940734e5 loadagent: binary memload command implemented
Mychaela Falconia <falcon@freecalypso.org>
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7 .globl serial_out_if_empty
3229940734e5 loadagent: binary memload command implemented
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8 serial_out_if_empty:
3229940734e5 loadagent: binary memload command implemented
Mychaela Falconia <falcon@freecalypso.org>
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9 ldr r1, =uart_base
3229940734e5 loadagent: binary memload command implemented
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10 ldr r2, [r1]
3229940734e5 loadagent: binary memload command implemented
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11 ldrb r3, [r2, #NS16550_LSR]
3229940734e5 loadagent: binary memload command implemented
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12 tst r3, #NS16550_LSR_THRE
3229940734e5 loadagent: binary memload command implemented
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13 strneb r0, [r2, #NS16550_THR]
3229940734e5 loadagent: binary memload command implemented
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14 bx lr