FreeCalypso > hg > freecalypso-tools
view target-utils/libload/cmd_memload.c @ 416:30f6d1c32c6f
doc/Flash-boot-defect article removed (no longer relevant)
This article is no longer relevant because the issue in question
only affected one (1) defective FCDEV3B board which was not
and never will be sold.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 26 Oct 2018 07:11:08 +0000 |
parents | 9214118ae941 |
children |
line wrap: on
line source
/* * 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]; memcpy(addr, srecbin + 5, len); }