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annotate target-utils/libcommon/uartsel.c @ 873:3be5a1b4c91a

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rvinterf/Makefile: asyncshell added
author Space Falcon <falcon@ivan.Harhan.ORG>
date Sat, 30 May 2015 06:45:21 +0000
parents 40f607bb0a2c
children a7b0b426f9ca
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1 /*
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2 * uart_select_init() figures out which UART was used to load us
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3 * through the boot ROM, and sets things up for us to use the same
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4 * UART for our communication.
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5 */
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6
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7 #include "types.h"
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8 #include "romvars.h"
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9 #include "ns16550.h"
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10 #include "halt.h"
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11
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12 extern struct boot_rom_vars rom_vars;
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13
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14 struct ns16550_regs *uart_base;
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15 char *uart_name;
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16
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17 uart_select_init()
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18 {
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19 switch (rom_vars.uart_id) {
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20 case 0:
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21 uart_base = (struct ns16550_regs *) 0xFFFF5800;
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22 uart_name = "MODEM";
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23 break;
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24 case 1:
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25 uart_base = (struct ns16550_regs *) 0xFFFF5000;
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26 uart_name = "IrDA";
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27 break;
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28 default:
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29 _exit(HALTCODE_INVALIDUART);
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30 }
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31 }