FreeCalypso > hg > freecalypso-tools
view target-utils/libload/cmd_memload.c @ 92:bfed7a5c21a6
target-utils/libc/bzero.S: changed signed conditions to unsigned
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 28 Oct 2016 23:45:49 +0000 |
parents | e7502631a0f9 |
children | 9214118ae941 |
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/* * This module implements the ML (memory load) command, which will be * used by fc-chainload. * * The sole argument to the ML command is the body of an S3 record * with the initial "S3" characters stripped, i.e., starting with the * "count" byte, followed by the address, data and checksum bytes * exactly as in the original S3 record. */ #include "types.h" void cmd_memload(argbulk) char *argbulk; { char *argv[2], *s; u8 srecbin[256], cksum; int len, i, c; u32 addr; if (parse_args(argbulk, 1, 1, argv, 0) < 0) return; s = argv[0]; if (decode_hex_digits(s, 2, &len) < 0) { inv: printf("ERROR: ML argument is invalid\n"); return; } s += 2; if (len < 6) goto inv; srecbin[0] = len; for (i = 1; i <= len; i++) { if (decode_hex_digits(s, 2, &c) < 0) goto inv; s += 2; srecbin[i] = c; } cksum = 0; for (i = 0; i <= len; i++) cksum += srecbin[i]; if (cksum != 0xFF) { printf("ERROR: bad ML S-record checksum\n"); return; } len -= 5; addr = ((u32)srecbin[1] << 24) | ((u32)srecbin[2] << 16) | ((u32)srecbin[3] << 8) | (u32)srecbin[4]; bcopy(srecbin + 5, addr, len); }