The attached patch adds a new option, CONFIG_XMODEM_ROM_STREAM, that
allows LinuxBIOS to download its payload from the console via the
XMODEM file transfer protocol.
This is handy if you want to try out a payload that's too big to fit
into ROM, and you haven't yet gotten IDE or USB devices to work.
I chose to hook this into the ROM stream code so it can take advantage
of the usual compression methods, but one could imagine moving it to a
separate "serial stream" mechanism.
Comments are welcome.
--Ed
--- LinuxBIOSv2.old/src/stream/rom_stream.c 2006-10-05 17:30:22.000000000 -0700
+++ LinuxBIOSv2/src/stream/rom_stream.c 2006-10-05 17:22:47.000000000 -0700
@@ -49,6 +49,8 @@
static const unsigned char *rom;
+extern int xmodemReceive(unsigned char *, int);
+
#if UNCOMPRESSER
unsigned long
uncompress(uint8_t * rom_start, uint8_t *dest )
@@ -65,8 +67,23 @@
int stream_init(void)
{
#if (UNCOMPRESSER)
- unsigned char *dest;
- unsigned long olen;
+ unsigned char *dest;
+ unsigned long olen;
+#endif
+
+#if (CONFIG_XMODEM_ROM_STREAM)
+ unsigned char *x_start = (unsigned char *) (32 * 1024 * 1024);
+ int x_len;
+
+ printk_debug("rom_stream: start XMODEM transfer now!\n");
+ if ((x_len = xmodemReceive(x_start, 8 * 1024 * 1024)) > 0) {
+ printk_debug("rom_stream: XMODEM transfer complete; %d bytes received\n", x_len);
+ rom_start = x_start;
+ rom_end = x_start + x_len;
+ }
+ else {
+ printk_debug("rom_stream: XMODEM transfer failed\n");
+ }
#endif
printk_debug("rom_stream: 0x%08lx - 0x%08lx\n",
--- LinuxBIOSv2.old/src/lib/xmodem.c 1969-12-31 16:00:00.000000000 -0800
+++ LinuxBIOSv2/src/lib/xmodem.c 2006-10-05 17:22:36.000000000 -0700
@@ -0,0 +1,355 @@
+/*
+ Copyright 2006 Arastra, Inc.
+ Copyright 2001, 2002 Georges Menie (www.menie.org)
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <string.h>
+#include <delay.h>
+
+extern void uart8250_tx_byte(unsigned, unsigned char);
+extern int uart8250_can_rx_byte(unsigned);
+extern unsigned char uart8250_rx_byte(unsigned);
+
+static int _inbyte(int msec)
+{
+ while (!uart8250_can_rx_byte(TTYS0_BASE)) {
+ udelay(1000);
+ if (msec-- <= 0)
+ return -1;
+ }
+ return uart8250_rx_byte(TTYS0_BASE);
+}
+
+static void _outbyte(unsigned char c)
+{
+ uart8250_tx_byte(TTYS0_BASE, c);
+}
+
+/* CRC16 implementation acording to CCITT standards */
+
+static const unsigned short crc16tab[256]= {
+ 0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,
+ 0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,
+ 0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,0x72f7,0x62d6,
+ 0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,
+ 0x2462,0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,
+ 0xa56a,0xb54b,0x8528,0x9509,0xe5ee,0xf5cf,0xc5ac,0xd58d,
+ 0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,0x46b4,
+ 0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,
+ 0x48c4,0x58e5,0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,
+ 0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,0x9969,0xa90a,0xb92b,
+ 0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,
+ 0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,
+ 0x6ca6,0x7c87,0x4ce4,0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,
+ 0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,0x8d68,0x9d49,
+ 0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,
+ 0xff9f,0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,
+ 0x9188,0x81a9,0xb1ca,0xa1eb,0xd10c,0xc12d,0xf14e,0xe16f,
+ 0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,0x6067,
+ 0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,
+ 0x02b1,0x1290,0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,
+ 0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,0xe54f,0xd52c,0xc50d,
+ 0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
+ 0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,
+ 0x26d3,0x36f2,0x0691,0x16b0,0x6657,0x7676,0x4615,0x5634,
+ 0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,0xb98a,0xa9ab,
+ 0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,
+ 0xcb7d,0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,
+ 0x4a75,0x5a54,0x6a37,0x7a16,0x0af1,0x1ad0,0x2ab3,0x3a92,
+ 0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,0x8dc9,
+ 0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,
+ 0xef1f,0xff3e,0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,
+ 0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,0x3eb2,0x0ed1,0x1ef0
+};
+
+static unsigned short crc16_ccitt(const void *buf, int len)
+{
+ register int counter;
+ register unsigned short crc = 0;
+ for( counter = 0; counter < len; counter++)
+ crc = (crc<<8) ^ crc16tab[((crc>>8) ^ *(char *)buf++)&0x00FF];
+ return crc;
+}
+
+#define SOH 0x01
+#define STX 0x02
+#define EOT 0x04
+#define ACK 0x06
+#define NAK 0x15
+#define CAN 0x18
+#define CTRLZ 0x1A
+
+#define DLY_1S 1000
+#define MAXRETRANS 25
+
+static int check(int crc, const unsigned char *buf, int sz)
+{
+ if (crc) {
+ unsigned short crc = crc16_ccitt(buf, sz);
+ unsigned short tcrc = (buf[sz]<<8)+buf[sz+1];
+ if (crc == tcrc)
+ return 1;
+ }
+ else {
+ int i;
+ unsigned char cks = 0;
+ for (i = 0; i < sz; ++i) {
+ cks += buf[i];
+ }
+ if (cks == buf[sz])
+ return 1;
+ }
+
+ return 0;
+}
+
+static void flushinput(void)
+{
+ while (_inbyte(((DLY_1S)*3)>>1) >= 0)
+ ;
+}
+
+int xmodemReceive(unsigned char *dest, int destsz)
+{
+ unsigned char xbuff[1030]; /* 1024 for XModem 1k + 3 head chars + 2 crc + nul */
+ unsigned char *p;
+ int bufsz, crc = 0;
+ unsigned char trychar = 'C';
+ unsigned char packetno = 1;
+ int i, c, len = 0;
+ int retry, retrans = MAXRETRANS;
+
+ for(;;) {
+ for( retry = 0; retry < 16; ++retry) {
+ if (trychar) _outbyte(trychar);
+ if ((c = _inbyte((DLY_1S)<<1)) >= 0) {
+ switch (c) {
+ case SOH:
+ bufsz = 128;
+ goto start_recv;
+ case STX:
+ bufsz = 1024;
+ goto start_recv;
+ case EOT:
+ flushinput();
+ _outbyte(ACK);
+ return len; /* normal end */
+ case CAN:
+ if ((c = _inbyte(DLY_1S)) == CAN) {
+ flushinput();
+ _outbyte(ACK);
+ return -1; /* canceled by remote */
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ if (trychar == 'C') { trychar = NAK; continue; }
+ flushinput();
+ _outbyte(CAN);
+ _outbyte(CAN);
+ _outbyte(CAN);
+ return -2; /* sync error */
+
+ start_recv:
+ if (trychar == 'C') crc = 1;
+ trychar = 0;
+ p = xbuff;
+ *p++ = c;
+ for (i = 0; i < (bufsz+(crc?1:0)+3); ++i) {
+ if ((c = _inbyte(DLY_1S)) < 0) goto reject;
+ *p++ = c;
+ }
+
+ if (xbuff[1] == (unsigned char)(~xbuff[2]) &&
+ (xbuff[1] == packetno || xbuff[1] == (unsigned char)packetno-1) &&
+ check(crc, &xbuff[3], bufsz)) {
+ if (xbuff[1] == packetno) {
+ register int count = destsz - len;
+ if (count > bufsz) count = bufsz;
+ if (count > 0) {
+ memcpy (&dest[len], &xbuff[3], count);
+ len += count;
+ }
+ ++packetno;
+ retrans = MAXRETRANS+1;
+ }
+ if (--retrans <= 0) {
+ flushinput();
+ _outbyte(CAN);
+ _outbyte(CAN);
+ _outbyte(CAN);
+ return -3; /* too many retry error */
+ }
+ _outbyte(ACK);
+ continue;
+ }
+ reject:
+ flushinput();
+ _outbyte(NAK);
+ }
+}
+
+int xmodemTransmit(unsigned char *src, int srcsz)
+{
+ unsigned char xbuff[1030]; /* 1024 for XModem 1k + 3 head chars + 2 crc + nul */
+ int bufsz, crc = -1;
+ unsigned char packetno = 1;
+ int i, c, len = 0;
+ int retry;
+
+ for(;;) {
+ for( retry = 0; retry < 16; ++retry) {
+ if ((c = _inbyte((DLY_1S)<<1)) >= 0) {
+ switch (c) {
+ case 'C':
+ crc = 1;
+ goto start_trans;
+ case NAK:
+ crc = 0;
+ goto start_trans;
+ case CAN:
+ if ((c = _inbyte(DLY_1S)) == CAN) {
+ _outbyte(ACK);
+ flushinput();
+ return -1; /* canceled by remote */
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ _outbyte(CAN);
+ _outbyte(CAN);
+ _outbyte(CAN);
+ flushinput();
+ return -2; /* no sync */
+
+ for(;;) {
+ start_trans:
+ xbuff[0] = SOH; bufsz = 128;
+ xbuff[1] = packetno;
+ xbuff[2] = ~packetno;
+ c = srcsz - len;
+ if (c > bufsz) c = bufsz;
+ if (c >= 0) {
+ memset (&xbuff[3], 0, bufsz);
+ if (c == 0) {
+ xbuff[3] = CTRLZ;
+ }
+ else {
+ memcpy (&xbuff[3], &src[len], c);
+ if (c < bufsz) xbuff[3+c] = CTRLZ;
+ }
+ if (crc) {
+ unsigned short ccrc = crc16_ccitt(&xbuff[3], bufsz);
+ xbuff[bufsz+3] = (ccrc>>8) & 0xFF;
+ xbuff[bufsz+4] = ccrc & 0xFF;
+ }
+ else {
+ unsigned char ccks = 0;
+ for (i = 3; i < bufsz+3; ++i) {
+ ccks += xbuff[i];
+ }
+ xbuff[bufsz+3] = ccks;
+ }
+ for (retry = 0; retry < MAXRETRANS; ++retry) {
+ for (i = 0; i < bufsz+4+(crc?1:0); ++i) {
+ _outbyte(xbuff[i]);
+ }
+ if ((c = _inbyte(DLY_1S)) >= 0 ) {
+ switch (c) {
+ case ACK:
+ ++packetno;
+ len += bufsz;
+ goto start_trans;
+ case CAN:
+ if ((c = _inbyte(DLY_1S)) == CAN) {
+ _outbyte(ACK);
+ flushinput();
+ return -1; /* canceled by remote */
+ }
+ break;
+ case NAK:
+ default:
+ break;
+ }
+ }
+ }
+ _outbyte(CAN);
+ _outbyte(CAN);
+ _outbyte(CAN);
+ flushinput();
+ return -4; /* xmit error */
+ }
+ else {
+ for (retry = 0; retry < 10; ++retry) {
+ _outbyte(EOT);
+ if ((c = _inbyte((DLY_1S)<<1)) == ACK) break;
+ }
+ flushinput();
+ return (c == ACK)?len:-5;
+ }
+ }
+ }
+}
+
+#ifdef TEST_XMODEM_RECEIVE
+int main(void)
+{
+ int st;
+
+ printf ("Send data using the xmodem protocol from your terminal emulator now...\n");
+ /* the following should be changed for your environment:
+ 0x30000 is the download address,
+ 65536 is the maximum size to be written at this address
+ */
+ st = xmodemReceive((char *)0x30000, 65536);
+ if (st < 0) {
+ printf ("Xmodem receive error: status: %d\n", st);
+ }
+ else {
+ printf ("Xmodem successfully received %d bytes\n", st);
+ }
+
+ return 0;
+}
+#endif
+#ifdef TEST_XMODEM_SEND
+int main(void)
+{
+ int st;
+
+ printf ("Prepare your terminal emulator to receive data now...\n");
+ /* the following should be changed for your environment:
+ 0x30000 is the download address,
+ 12000 is the maximum size to be send from this address
+ */
+ st = xmodemTransmit((char *)0x30000, 12000);
+ if (st < 0) {
+ printf ("Xmodem transmit error: status: %d\n", st);
+ }
+ else {
+ printf ("Xmodem successfully transmitted %d bytes\n", st);
+ }
+
+ return 0;
+}
+#endif
--- LinuxBIOSv2.old/src/lib/Config.lb 2006-10-05 17:30:31.000000000 -0700
+++ LinuxBIOSv2/src/lib/Config.lb 2006-10-05 16:13:37.000000000 -0700
@@ -13,6 +13,7 @@
object fallback_boot.o
object compute_ip_checksum.o
object version.o
+object xmodem.o
# Force version.o to recompile every time
makedefine .PHONY : version.o
--- LinuxBIOSv2.old/src/config/Options.lb 2006-10-05 17:30:31.000000000 -0700
+++ LinuxBIOSv2/src/config/Options.lb 2006-10-05 16:53:12.000000000 -0700
@@ -629,6 +629,11 @@
export always
comment "boot image is already compressed"
end
+define CONFIG_XMODEM_ROM_STREAM
+ default 0
+ export always
+ comment "First try downloading boot image from console via XMODEM"
+end
define CONFIG_FS_STREAM
default 0
export always
--- LinuxBIOSv2.old/src/lib/uart8250.c 2006-10-05 17:30:31.000000000 -0700
+++ LinuxBIOSv2/src/lib/uart8250.c 2006-10-05 16:10:49.000000000 -0700
@@ -64,6 +64,8 @@
outb(0x0, base_port + UART_IER);
/* enable fifo's */
outb(0x01, base_port + UART_FCR);
+ /* assert DTR and RTS so the other end is happy */
+ outb(0x03, base_port + UART_MCR);
/* Set Baud Rate Divisor to 12 ==> 115200 Baud */
outb(0x80 | lcs, base_port + UART_LCR);
outb(divisor & 0xFF, base_port + UART_DLL);
--
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