/**************************************************************************
Etherboot - Network Bootstrap Program
Literature dealing with the network protocols:
ARP - RFC826
RARP - RFC903
UDP - RFC768
BOOTP - RFC951, RFC2132 (vendor extensions)
DHCP - RFC2131, RFC2132 (options)
TFTP - RFC1350, RFC2347 (options), RFC2348 (blocksize), RFC2349 (tsize)
RPC - RFC1831, RFC1832 (XDR), RFC1833 (rpcbind/portmapper)
NFS - RFC1094, RFC1813 (v3, useful for clarifications, not implemented)
IGMP - RFC1112
**************************************************************************/
/* #define MDEBUG */
#include "etherboot.h"
#include "dev.h"
#include "nic.h"
#include "disk.h"
#include "timer.h"
#include "cpu.h"
#include "cmdline.h"
#include "console.h"
#include <gpxe/init.h>
#include "image.h"
#include <stdarg.h>
#include <gpxe/device.h>
#include <gpxe/heap.h>
#include <gpxe/netdevice.h>
#include <gpxe/shell.h>
#include <gpxe/shell_banner.h>
#include <gpxe/autoboot.h>
/* Linker symbols */
extern char _bss[], _ebss[];
jmp_buf restart_etherboot;
int url_port;
char as_main_program = 1;
#if 0
static inline unsigned long ask_boot(unsigned *index)
{
unsigned long order = DEFAULT_BOOT_ORDER;
*index = DEFAULT_BOOT_INDEX;
#ifdef LINUXBIOS
order = get_boot_order(order, index);
#endif
#if defined(ASK_BOOT)
#if ASK_BOOT >= 0
while(1) {
int c = 0;
printf(ASK_PROMPT);
#if ASK_BOOT > 0
{
unsigned long time;
for ( time = currticks() + ASK_BOOT*TICKS_PER_SEC;
!c && !iskey(); ) {
if (currticks() > time) c = ANS_DEFAULT;
}
}
#endif /* ASK_BOOT > 0 */
if ( !c ) c = getchar();
if ((c >= 'a') && (c <= 'z')) c &= 0x5F;
if ((c >= ' ') && (c <= '~')) putchar(c);
putchar('\n');
switch(c) {
default:
/* Nothing useful try again */
continue;
case ANS_QUIT:
order = BOOT_NOTHING;
*index = 0;
break;
case ANS_DEFAULT:
/* Preserve the default boot order */
break;
case ANS_NETWORK:
order = (BOOT_NIC << (0*BOOT_BITS)) |
(BOOT_NOTHING << (1*BOOT_BITS));
*index = 0;
break;
case ANS_DISK:
order = (BOOT_DISK << (0*BOOT_BITS)) |
(BOOT_NOTHING << (1*BOOT_BITS));
*index = 0;
break;
case ANS_FLOPPY:
order = (BOOT_FLOPPY << (0*BOOT_BITS)) |
(BOOT_NOTHING << (1*BOOT_BITS));
*index = 0;
break;
}
break;
}
putchar('\n');
#endif /* ASK_BOOT >= 0 */
#endif /* defined(ASK_BOOT) */
return order;
}
static inline void try_floppy_first(void)
{
#if (TRY_FLOPPY_FIRST > 0)
int i;
printf("Trying floppy");
disk_init();
for (i = TRY_FLOPPY_FIRST; i-- > 0; ) {
putchar('.');
if (pcbios_disk_read(0, 0, 0, 0, ((char *)FLOPPY_BOOT_LOCATION)) != 0x8000) {
printf("using floppy\n");
exit(0);
}
}
printf("no floppy\n");
#endif /* TRY_FLOPPY_FIRST */
}
static struct class_operations {
struct dev *dev;
int (*probe)(struct dev *dev);
int (*load_configuration)(struct dev *dev);
int (*load)(struct dev *dev);
}
operations[] = {
{ &nic.dev, eth_probe, eth_load_configuration, eth_load },
{ &disk.dev, disk_probe, disk_load_configuration, disk_load },
{ &disk.dev, disk_probe, disk_load_configuration, disk_load },
};
#endif
#if 0
static int main_loop(int state);
static int exit_ok;
static int initialized;
#endif
static int exit_status;
/**************************************************************************
MAIN - Kick off routine
**************************************************************************/
int main ( void ) {
/* Call all registered initialisation functions */
init_heap();
call_init_fns ();
probe_devices();
/* Try autobooting if we're not going straight to the shell */
if ( ! shell_banner() ) {
autoboot();
}
/* Autobooting failed or the user wanted the shell */
shell();
remove_devices();
call_exit_fns ();
return exit_status;
}
#if 0
void exit(int status)
{
while(!exit_ok)
;
exit_status = status;
longjmp(restart_etherboot, 255);
}
static int main_loop(int state)
{
/* Splitting main into 2 pieces makes the semantics of
* which variables are preserved across a longjmp clean
* and predictable.
*/
static unsigned long order;
static unsigned boot_index;
static struct dev * dev = 0;
static struct class_operations *ops;
static int type;
static int i;
if (!initialized) {
initialized = 1;
if (dev && (state >= 1) && (state <= 2)) {
dev->how_probe = PROBE_AWAKE;
dev->how_probe = ops->probe(dev);
if (dev->how_probe == PROBE_FAILED) {
state = -1;
}
if (state == 1) {
/* The bootp reply might have been changed, re-parse. */
decode_rfc1533(bootp_data.bootp_reply.bp_vend, 0,
#ifdef NO_DHCP_SUPPORT
BOOTP_VENDOR_LEN + MAX_BOOTP_EXTLEN,
#else
DHCP_OPT_LEN + MAX_BOOTP_EXTLEN,
#endif /* NO_DHCP_SUPPORT */
1);
}
}
}
switch(state) {
case 0:
{
static int firsttime = 1;
/* First time through */
if (firsttime) {
cleanup();
firsttime = 0;
}
#ifdef EXIT_IF_NO_OFFER
else {
cleanup();
exit(0);
}
#endif
i = -1;
state = 4;
dev = 0;
/* We just called setjmp ... */
order = ask_boot(&boot_index);
try_floppy_first();
break;
}
case 4:
cleanup();
call_reset_fns();
/* Find a dev entry to probe with */
if (!dev) {
int boot;
int failsafe;
/* Advance to the next device type */
i++;
boot = (order >> (i * BOOT_BITS)) & BOOT_MASK;
type = boot & BOOT_TYPE_MASK;
failsafe = (boot & BOOT_FAILSAFE) != 0;
if (i >= MAX_BOOT_ENTRIES) {
type = BOOT_NOTHING;
}
if ((i == 0) && (type == BOOT_NOTHING)) {
/* Return to caller */
exit(0);
}
if (type >= BOOT_NOTHING) {
interruptible_sleep(2);
state = 0;
break;
}
ops = &operations[type];
dev = ops->dev;
dev->how_probe = PROBE_FIRST;
dev->type = type;
dev->failsafe = failsafe;
dev->type_index = 0;
} else {
/* Advance to the next device of the same type */
dev->how_probe = PROBE_NEXT;
}
state = 3;
break;
case 3:
state = -1;
/* Removed the following line because it was causing
* heap.o to be dragged in unnecessarily. It's also
* slightly puzzling: by resetting heap_base, doesn't
* this mean that we permanently leak memory?
*/
/* heap_base = allot(0); */
dev->how_probe = ops->probe(dev);
if (dev->how_probe == PROBE_FAILED) {
dev = 0;
state = 4;
} else if (boot_index && (i == 0) && (boot_index != (unsigned)dev->type_index)) {
printf("Wrong index\n");
state = 4;
}
else {
state = 2;
}
break;
case 2:
state = -1;
if (ops->load_configuration(dev) >= 0) {
state = 1;
}
break;
case 1:
/* Any return from load is a failure */
ops->load(dev);
state = -1;
break;
case 256:
state = 0;
break;
case -3:
i = MAX_BOOT_ENTRIES;
type = BOOT_NOTHING;
/* fall through */
default:
printf("<abort>\n");
state = 4;
/* At the end goto state 0 */
if ((type >= BOOT_NOTHING) || (i >= MAX_BOOT_ENTRIES)) {
state = 0;
}
break;
}
return state;
}
#endif
/**************************************************************************
LOADKERNEL - Try to load kernel image
**************************************************************************/
#if 0
/* To be split out into individual files */
static const struct proto protos[] = {
{ "x-tftm", url_tftm },
{ "x-slam", url_slam },
{ "nfs", nfs },
{ "file", url_file },
{ "tftp", tftp },
{ "http", http },
};
#endif
/**************************************************************************
CLEANUP - shut down networking and console so that the OS may be called
**************************************************************************/
#if 0
void cleanup(void)
{
/* Stop receiving packets */
disable ( &dev );
initialized = 0;
}
#endif
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
