FreeCalypso > hg > freecalypso-citrine

annotate lldbg/cmd_w16.c @ 26:51e1a3b213a3

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started re-adding documentation
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Jun 2016 07:01:34 +0000
parents 75a11d740a02
children
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * w16 hexaddr xxxx -- write a 16-bit register or memory location
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3 */
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4
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5 #include <sys/types.h>
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6 #include "types.h"
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7
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8 void
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9 lldbg_cmd_w16(argbulk)
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10 char *argbulk;
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11 {
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12 char *argv[3];
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13 u_long addr, data;
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14
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15 if (lldbg_parse_args(argbulk, 2, 2, argv, 0) < 0)
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16 return;
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17 if (lldbg_parse_hexarg(argv[0], 8, &addr) < 0) {
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18 lldbg_printf("ERROR: arg1 must be a valid 32-bit hex address\n");
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19 return;
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20 }
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21 if (addr & 1) {
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22 lldbg_printf("ERROR: unaligned address\n");
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23 return;
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24 }
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25 if (lldbg_parse_hexarg(argv[1], 4, &data) < 0) {
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26 lldbg_printf("ERROR: arg2 must be a valid 16-bit hex value\n");
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27 return;
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28 }
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29 *(volatile u16 *)addr = data;
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30 }