copy.c

来自「mips架构的bootloader,99左右的版本 但源代码现在没人更新了」· C语言 代码 · 共 87 行

/*************************************************************
 * File: mon/copy.c
 * Purpose: Part of core Monitor
 * Author: Phil Bunce ([e-mail])
 * Revision History:
 *	970304	Start of revision history
 *	980406	Added blksz.
 */

#include <mon.h>

Optdesc copy_opts[] = {
	{"[-f] from to siz","copy memory"},
	{"from","source of copy"},
	{"to","destination of copy"},
	{"cnt","copy cnt bytes"},
	{"-f","write to flash"},
	{0}};

/*************************************************************
*  copy(ac,av)
*	the 'copy' command 
*/
copy(ac,av)
int ac;
char *av[];
{
Ulong from, to, n;
int i,fflag,blksz;
char buf[100];

if (!regChain) {
	printf("Target Description Driver not loaded\n");
	return(1);
	}

fflag = 0;
for (i=1;i<ac;i++) {
	if (av[i][0] == '-') {
		if (strequ(av[i],"-f")) fflag++;
		else {
			printf("%s: bad option\n",av[i]);
			return(1);
			}
		}
	else break;
	}

if (ac-i != 3) {
	printf("bad argument count\n");
	return(1);
	}

if(!get_rsa(&from,av[i]) || !get_rsa(&to,av[i+1]) || !get_rsa(&n,av[i+2]))
	return(1);

if (fflag) {
#ifdef NVRAM
	if (fflag < 2) {
	   /* use 2 -f flags to skip this warning */
	   printf("Are you sure that you want to write to the flashes (y/n)?");
		gets(buf);
		if (!strequ(buf,"y")) return;
		}

	blksz = nvInfo.width*nvInfo.type->se; /* 980406 */
	if (to&(blksz-1)) {
		printf("error: flash write must start on a %dKB boundary.\n",
								blksz/1024);
		return(1);
		}
	while(n-- > 0) writeFlash(to++, read_target(XT_MEM,from++,1));
	return(0);
#else
	printf("write to NVRAM not supported with this configuration.\n");
	return(1);
#endif
	}

if (to < from)
	while(n-- > 0) write_target(XT_MEM,to++, read_target(XT_MEM,from++,1),1);
else
	for (from += n,to += n;n-- > 0;) 
		write_target(XT_MEM,--to, read_target(XT_MEM,--from,1),1);
return(0);
}