mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-14 07:11:32 +00:00
Make shutdown functions callable by OS image's exec methods.
This commit is contained in:
Michael Brown
parent
c088ecf042
commit
c2708df14a
359
src/core/main.c
359
src/core/main.c
@ -14,145 +14,44 @@ Literature dealing with the network protocols:
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**************************************************************************/
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/* #define MDEBUG */
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#include "etherboot.h"
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#include "dev.h"
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#include "nic.h"
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#include "disk.h"
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#include "timer.h"
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#include "cpu.h"
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#include "cmdline.h"
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#include "console.h"
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#include <gpxe/init.h>
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#include <stdarg.h>
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#include <gpxe/device.h>
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#include <gpxe/heap.h>
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#include <gpxe/netdevice.h>
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#include <gpxe/init.h>
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#include <gpxe/device.h>
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#include <gpxe/shell.h>
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#include <gpxe/shell_banner.h>
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#include <gpxe/shutdown.h>
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#include <usr/autoboot.h>
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/* Linker symbols */
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extern char _bss[], _ebss[];
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jmp_buf restart_etherboot;
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int url_port;
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char as_main_program = 1;
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#if 0
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static inline unsigned long ask_boot(unsigned *index)
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{
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unsigned long order = DEFAULT_BOOT_ORDER;
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*index = DEFAULT_BOOT_INDEX;
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#ifdef LINUXBIOS
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order = get_boot_order(order, index);
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#endif
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#if defined(ASK_BOOT)
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#if ASK_BOOT >= 0
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while(1) {
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int c = 0;
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printf(ASK_PROMPT);
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#if ASK_BOOT > 0
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{
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unsigned long time;
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for ( time = currticks() + ASK_BOOT*TICKS_PER_SEC;
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!c && !iskey(); ) {
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if (currticks() > time) c = ANS_DEFAULT;
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}
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}
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#endif /* ASK_BOOT > 0 */
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if ( !c ) c = getchar();
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if ((c >= 'a') && (c <= 'z')) c &= 0x5F;
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if ((c >= ' ') && (c <= '~')) putchar(c);
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putchar('\n');
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switch(c) {
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default:
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/* Nothing useful try again */
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continue;
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case ANS_QUIT:
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order = BOOT_NOTHING;
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*index = 0;
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break;
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case ANS_DEFAULT:
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/* Preserve the default boot order */
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break;
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case ANS_NETWORK:
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order = (BOOT_NIC << (0*BOOT_BITS)) |
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(BOOT_NOTHING << (1*BOOT_BITS));
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*index = 0;
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break;
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case ANS_DISK:
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order = (BOOT_DISK << (0*BOOT_BITS)) |
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(BOOT_NOTHING << (1*BOOT_BITS));
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*index = 0;
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break;
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case ANS_FLOPPY:
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order = (BOOT_FLOPPY << (0*BOOT_BITS)) |
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(BOOT_NOTHING << (1*BOOT_BITS));
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*index = 0;
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break;
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}
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break;
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}
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putchar('\n');
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#endif /* ASK_BOOT >= 0 */
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#endif /* defined(ASK_BOOT) */
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return order;
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}
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static inline void try_floppy_first(void)
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{
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#if (TRY_FLOPPY_FIRST > 0)
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int i;
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printf("Trying floppy");
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disk_init();
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for (i = TRY_FLOPPY_FIRST; i-- > 0; ) {
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putchar('.');
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if (pcbios_disk_read(0, 0, 0, 0, ((char *)FLOPPY_BOOT_LOCATION)) != 0x8000) {
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printf("using floppy\n");
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exit(0);
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}
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}
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printf("no floppy\n");
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#endif /* TRY_FLOPPY_FIRST */
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}
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static struct class_operations {
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struct dev *dev;
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int (*probe)(struct dev *dev);
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int (*load_configuration)(struct dev *dev);
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int (*load)(struct dev *dev);
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}
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operations[] = {
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{ &nic.dev, eth_probe, eth_load_configuration, eth_load },
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{ &disk.dev, disk_probe, disk_load_configuration, disk_load },
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{ &disk.dev, disk_probe, disk_load_configuration, disk_load },
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};
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#endif
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#if 0
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static int main_loop(int state);
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static int exit_ok;
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static int initialized;
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#endif
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static int exit_status;
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/**************************************************************************
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MAIN - Kick off routine
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**************************************************************************/
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int main ( void ) {
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/* Call all registered initialisation functions */
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/**
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* Start up Etherboot
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*
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* Call this function only once, before doing (almost) anything else.
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*/
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static void startup ( void ) {
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init_heap();
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call_init_fns ();
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probe_devices();
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}
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/**
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* Shut down Etherboot
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*
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* Call this function only once, before either exiting main() or
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* starting up a non-returnable image.
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*/
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void shutdown ( void ) {
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remove_devices();
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call_exit_fns ();
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}
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/**
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* Main entry point
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*
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* @ret rc Return status code
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*/
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int main ( void ) {
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startup();
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/* Try autobooting if we're not going straight to the shell */
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if ( ! shell_banner() ) {
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@ -162,201 +61,7 @@ int main ( void ) {
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/* Autobooting failed or the user wanted the shell */
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shell();
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remove_devices();
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call_exit_fns ();
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shutdown();
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return exit_status;
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return 0;
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}
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#if 0
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void exit(int status)
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{
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while(!exit_ok)
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;
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exit_status = status;
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longjmp(restart_etherboot, 255);
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}
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static int main_loop(int state)
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{
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/* Splitting main into 2 pieces makes the semantics of
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* which variables are preserved across a longjmp clean
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* and predictable.
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*/
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static unsigned long order;
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static unsigned boot_index;
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static struct dev * dev = 0;
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static struct class_operations *ops;
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static int type;
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static int i;
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if (!initialized) {
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initialized = 1;
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if (dev && (state >= 1) && (state <= 2)) {
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dev->how_probe = PROBE_AWAKE;
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dev->how_probe = ops->probe(dev);
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if (dev->how_probe == PROBE_FAILED) {
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state = -1;
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}
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if (state == 1) {
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/* The bootp reply might have been changed, re-parse. */
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decode_rfc1533(bootp_data.bootp_reply.bp_vend, 0,
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#ifdef NO_DHCP_SUPPORT
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BOOTP_VENDOR_LEN + MAX_BOOTP_EXTLEN,
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#else
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DHCP_OPT_LEN + MAX_BOOTP_EXTLEN,
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#endif /* NO_DHCP_SUPPORT */
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1);
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}
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}
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}
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switch(state) {
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case 0:
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{
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static int firsttime = 1;
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/* First time through */
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if (firsttime) {
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cleanup();
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firsttime = 0;
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}
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#ifdef EXIT_IF_NO_OFFER
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else {
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cleanup();
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exit(0);
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}
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#endif
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i = -1;
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state = 4;
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dev = 0;
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/* We just called setjmp ... */
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order = ask_boot(&boot_index);
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try_floppy_first();
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break;
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}
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case 4:
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cleanup();
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call_reset_fns();
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/* Find a dev entry to probe with */
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if (!dev) {
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int boot;
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int failsafe;
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/* Advance to the next device type */
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i++;
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boot = (order >> (i * BOOT_BITS)) & BOOT_MASK;
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type = boot & BOOT_TYPE_MASK;
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failsafe = (boot & BOOT_FAILSAFE) != 0;
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if (i >= MAX_BOOT_ENTRIES) {
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type = BOOT_NOTHING;
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}
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if ((i == 0) && (type == BOOT_NOTHING)) {
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/* Return to caller */
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exit(0);
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}
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if (type >= BOOT_NOTHING) {
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interruptible_sleep(2);
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state = 0;
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break;
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}
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ops = &operations[type];
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dev = ops->dev;
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dev->how_probe = PROBE_FIRST;
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dev->type = type;
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dev->failsafe = failsafe;
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dev->type_index = 0;
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} else {
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/* Advance to the next device of the same type */
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dev->how_probe = PROBE_NEXT;
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}
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state = 3;
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break;
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case 3:
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state = -1;
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/* Removed the following line because it was causing
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* heap.o to be dragged in unnecessarily. It's also
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* slightly puzzling: by resetting heap_base, doesn't
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* this mean that we permanently leak memory?
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*/
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/* heap_base = allot(0); */
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dev->how_probe = ops->probe(dev);
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if (dev->how_probe == PROBE_FAILED) {
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dev = 0;
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state = 4;
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} else if (boot_index && (i == 0) && (boot_index != (unsigned)dev->type_index)) {
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printf("Wrong index\n");
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state = 4;
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}
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else {
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state = 2;
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}
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break;
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case 2:
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state = -1;
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if (ops->load_configuration(dev) >= 0) {
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state = 1;
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}
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break;
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case 1:
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/* Any return from load is a failure */
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ops->load(dev);
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state = -1;
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break;
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case 256:
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state = 0;
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break;
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case -3:
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i = MAX_BOOT_ENTRIES;
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type = BOOT_NOTHING;
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/* fall through */
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default:
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printf("<abort>\n");
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state = 4;
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/* At the end goto state 0 */
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if ((type >= BOOT_NOTHING) || (i >= MAX_BOOT_ENTRIES)) {
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state = 0;
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}
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break;
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}
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return state;
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}
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#endif
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/**************************************************************************
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LOADKERNEL - Try to load kernel image
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**************************************************************************/
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#if 0
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/* To be split out into individual files */
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static const struct proto protos[] = {
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{ "x-tftm", url_tftm },
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{ "x-slam", url_slam },
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{ "nfs", nfs },
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{ "file", url_file },
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{ "tftp", tftp },
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{ "http", http },
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};
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#endif
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/**************************************************************************
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CLEANUP - shut down networking and console so that the OS may be called
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**************************************************************************/
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#if 0
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void cleanup(void)
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{
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/* Stop receiving packets */
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disable ( &dev );
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initialized = 0;
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}
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#endif
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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@ -94,32 +94,6 @@ void interruptible_sleep(int secs)
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sleep(secs);
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}
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/**************************************************************************
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TWIDDLE
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**************************************************************************/
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void twiddle(void)
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{
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#ifdef BAR_PROGRESS
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static int count=0;
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static const char tiddles[]="-\\|/";
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static unsigned long lastticks = 0;
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unsigned long ticks;
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#endif
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if ( ! as_main_program ) return;
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#ifdef BAR_PROGRESS
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/* Limit the maximum rate at which characters are printed */
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ticks = currticks();
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if ((lastticks + (TICKS_PER_SEC/18)) > ticks)
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return;
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lastticks = ticks;
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putchar(tiddles[(count++)&3]);
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putchar('\b');
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#else
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putchar('.');
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#endif /* BAR_PROGRESS */
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}
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/**************************************************************************
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STRCASECMP (not entirely correct, but this will do for our purposes)
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**************************************************************************/
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10
src/include/gpxe/shutdown.h
Normal file
10
src/include/gpxe/shutdown.h
Normal file
@ -0,0 +1,10 @@
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#ifndef _GPXE_SHUTDOWN_H
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#define _GPXE_SHUTDOWN_H
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/**
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* Shut down before exit
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*/
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extern void shutdown ( void );
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#endif /* _GPXE_SHUTDOWN_H */
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