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comparison target-utils/loadagent/bindump.c @ 638:6562364b2033

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loadagent: BINDUMP command implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 01 Mar 2020 18:14:56 +0000
parents
children 963d15a808eb
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637:fa8e197a1d9b 638:6562364b2033
1 /*
2 * Here we are going to implement a new memory dump command for use by
3 * fc-loadtool, sending the dump stream to the host in binary instead of hex
4 * S-records.
5 *
6 * We could send the entire stream continuously without any structure or
7 * breaks, but if we did that, fc-loadtool would not be able to detect a slip
8 * (byte loss error) in the serial stream until the end of the dump,
9 * potentially minutes long. For this reason we are taking a different
10 * approach: we are going to send the dump stream in blocks of 8192 bytes,
11 * with each block preceded by an 8-byte binary header. Loadtool will know
12 * and expect the same block structure, and seeing our block headers in the
13 * right positions in the stream will provide assurance of synchronization.
14 */
15
16 #include <sys/types.h>
17 #include "types.h"
18
19 void
20 cmd_memdump_binary(argbulk)
21 char *argbulk;
22 {
23 char *argv[3];
24 u_long start, length;
25 u_long addr, remlen, blklen;
26 int i;
27
28 if (parse_args(argbulk, 2, 2, argv, 0) < 0)
29 return;
30 if (parse_hexarg(argv[0], 8, &start) < 0) {
31 printf("ERROR: arg1 must be a valid 32-bit hex address\n");
32 return;
33 }
34 if (parse_hexarg(argv[1], 8, &length) < 0) {
35 printf("ERROR: arg2 must be a valid 32-bit hex value (length)\n");
36 return;
37 }
38 addr = start;
39 for (remlen = length; remlen; remlen -= blklen) {
40 blklen = 8192;
41 if (remlen < blklen)
42 blklen = remlen;
43 serial_out(0x55);
44 serial_out(0xAA);
45 serial_out(addr >> 24);
46 serial_out(addr >> 16);
47 serial_out(addr >> 8);
48 serial_out(addr);
49 serial_out(blklen >> 8);
50 serial_out(blklen);
51 for (; blklen; blklen--) {
52 serial_out(*(volatile u8 *)addr);
53 addr++;
54 }
55 }
56 }