FreeCalypso > hg > freecalypso-tools
comparison target-utils/loadagent/serextra.S @ 648:3229940734e5
loadagent: binary memload command implemented
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Mon, 02 Mar 2020 02:32:18 +0000 |
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| children |
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| 647:dfe6ba3611cd | 648:3229940734e5 |
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| 1 #include "ns16550.h" | |
| 2 | |
| 3 @ extra serial I/O functions for loadagent binary operations | |
| 4 | |
| 5 .text | |
| 6 .code 32 | |
| 7 .globl serial_out_if_empty | |
| 8 serial_out_if_empty: | |
| 9 ldr r1, =uart_base | |
| 10 ldr r2, [r1] | |
| 11 ldrb r3, [r2, #NS16550_LSR] | |
| 12 tst r3, #NS16550_LSR_THRE | |
| 13 strneb r0, [r2, #NS16550_THR] | |
| 14 bx lr |