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- /** @file
- *
- * PXE Preboot API
- *
- */
-
- /* PXE API interface for Etherboot.
- *
- * Copyright (C) 2004 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or 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
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include "pxe.h"
- #include "pxe_callbacks.h"
-
- /**
- * UNLOAD BASE CODE STACK
- *
- * @v None -
- * @ret ...
- *
- */
- PXENV_EXIT_t pxenv_unload_stack ( struct s_PXENV_UNLOAD_STACK *unload_stack ) {
- int success;
-
- DBG ( "PXENV_UNLOAD_STACK" );
- success = ensure_pxe_state ( CAN_UNLOAD );
-
- /* We need to call cleanup() at some point. The network card
- * has already been disabled by ENSURE_CAN_UNLOAD(), but for
- * the sake of completeness we should call the console_fini()
- * etc. that are part of cleanup().
- *
- * There seems to be a lack of consensus on which is the final
- * PXE API call to make, but it's a fairly safe bet that all
- * the potential shutdown sequences will include a call to
- * PXENV_UNLOAD_STACK at some point, so we may as well do it
- * here.
- */
- cleanup();
-
- if ( ! success ) {
- unload_stack->Status = PXENV_STATUS_KEEP_ALL;
- return PXENV_EXIT_FAILURE;
- }
-
- unload_stack->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /* PXENV_GET_CACHED_INFO
- *
- * Status: working
- */
- PXENV_EXIT_t pxenv_get_cached_info ( struct s_PXENV_GET_CACHED_INFO
- *get_cached_info ) {
- BOOTPLAYER_t *cached_info = &pxe_stack->cached_info;
- DBG ( "PXENV_GET_CACHED_INFO %d", get_cached_info->PacketType );
- ENSURE_READY ( get_cached_info );
-
- /* Fill in cached_info structure in our pxe_stack */
-
- /* I don't think there's actually any way we can be called in
- * the middle of a DHCP request...
- */
- cached_info->opcode = BOOTP_REP;
- /* We only have Ethernet drivers */
- cached_info->Hardware = ETHER_TYPE;
- cached_info->Hardlen = ETH_ALEN;
- /* PXESPEC: "Client sets" says the spec, but who's filling in
- * this structure? It ain't the client.
- */
- cached_info->Gatehops = 0;
- cached_info->ident = 0;
- cached_info->seconds = 0;
- cached_info->Flags = BOOTP_BCAST;
- /* PXESPEC: What do 'Client' and 'Your' IP address refer to? */
- cached_info->cip = arptable[ARP_CLIENT].ipaddr.s_addr;
- cached_info->yip = arptable[ARP_CLIENT].ipaddr.s_addr;
- cached_info->sip = arptable[ARP_SERVER].ipaddr.s_addr;
- /* PXESPEC: Does "GIP" mean "Gateway" or "Relay agent"? */
- cached_info->gip = arptable[ARP_GATEWAY].ipaddr.s_addr;
- memcpy ( cached_info->CAddr, arptable[ARP_CLIENT].node, ETH_ALEN );
- /* Nullify server name */
- cached_info->Sname[0] = '\0';
- memcpy ( cached_info->bootfile, KERNEL_BUF,
- sizeof(cached_info->bootfile) );
- /* Copy DHCP vendor options */
- memcpy ( &cached_info->vendor.d, bootp_data.bootp_reply.bp_vend,
- sizeof(cached_info->vendor.d) );
-
- /* Copy to user-specified buffer, or set pointer to our buffer */
- get_cached_info->BufferLimit = sizeof(*cached_info);
- /* PXESPEC: says to test for Buffer == NULL *and* BufferSize =
- * 0, but what are we supposed to do with a null buffer of
- * non-zero size?!
- */
- if ( IS_NULL_SEGOFF16 ( get_cached_info->Buffer ) ) {
- /* Point back to our buffer */
- PTR_TO_SEGOFF16 ( cached_info, get_cached_info->Buffer );
- get_cached_info->BufferSize = sizeof(*cached_info);
- } else {
- /* Copy to user buffer */
- size_t size = sizeof(*cached_info);
- void *buffer = SEGOFF16_TO_PTR ( get_cached_info->Buffer );
- if ( get_cached_info->BufferSize < size )
- size = get_cached_info->BufferSize;
- DBG ( " to %x", virt_to_phys ( buffer ) );
- memcpy ( buffer, cached_info, size );
- /* PXESPEC: Should we return an error if the user
- * buffer is too small? We do return the actual size
- * of the buffer via BufferLimit, so the user does
- * have a way to detect this already.
- */
- }
-
- get_cached_info->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /* PXENV_RESTART_TFTP
- *
- * Status: working
- */
- PXENV_EXIT_t pxenv_restart_tftp ( struct s_PXENV_TFTP_READ_FILE
- *restart_tftp ) {
- PXENV_EXIT_t tftp_exit;
-
- DBG ( "PXENV_RESTART_TFTP" );
- ENSURE_READY ( restart_tftp );
-
- /* Words cannot describe the complete mismatch between the PXE
- * specification and any possible version of reality...
- */
- restart_tftp->Buffer = PXE_LOAD_ADDRESS; /* Fixed by spec, apparently */
- restart_tftp->BufferSize = get_free_base_memory() - PXE_LOAD_ADDRESS; /* Near enough */
- DBG ( "(" );
- tftp_exit = pxe_api_call ( PXENV_TFTP_READ_FILE, (union u_PXENV_ANY*)restart_tftp );
- DBG ( ")" );
- if ( tftp_exit != PXENV_EXIT_SUCCESS ) return tftp_exit;
-
- /* Fire up the new NBP */
- restart_tftp->Status = xstartpxe();
-
- /* Not sure what "SUCCESS" actually means, since we can only
- * return if the new NBP failed to boot...
- */
- return PXENV_EXIT_SUCCESS;
- }
-
- /* PXENV_START_UNDI
- *
- * Status: working
- */
- PXENV_EXIT_t pxenv_start_undi ( struct s_PXENV_START_UNDI *start_undi ) {
- unsigned char bus, devfn;
-
- DBG ( "PXENV_START_UNDI" );
- ENSURE_MIDWAY(start_undi);
-
- /* Record PCI bus & devfn passed by caller, so we know which
- * NIC they want to use.
- *
- * If they don't match our already-existing NIC structure, set
- * values to ensure that the specified NIC is used at the next
- * call to pxe_intialise_nic().
- */
- bus = ( start_undi->AX >> 8 ) & 0xff;
- devfn = start_undi->AX & 0xff;
-
- #warning "device probing mechanism has completely changed"
- #if 0
- if ( ( pci->dev.driver == NULL ) ||
- ( pci->dev.bus != bus ) || ( pci->dev.devfn != devfn ) ) {
- /* This is quite a bit of a hack and relies on
- * knowledge of the internal operation of Etherboot's
- * probe mechanism.
- */
- DBG ( " set PCI %hhx:%hhx.%hhx",
- bus, PCI_SLOT(devfn), PCI_FUNC(devfn) );
- dev->type = BOOT_NIC;
- dev->to_probe = PROBE_PCI;
- memset ( &dev->state, 0, sizeof(dev->state) );
- pci->advance = 1;
- pci->dev.use_specified = 1;
- pci->dev.bus = bus;
- pci->dev.devfn = devfn;
- }
- #endif
-
- start_undi->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /* PXENV_STOP_UNDI
- *
- * Status: working
- */
- PXENV_EXIT_t pxenv_stop_undi ( struct s_PXENV_STOP_UNDI *stop_undi ) {
- DBG ( "PXENV_STOP_UNDI" );
-
- if ( ! ensure_pxe_state(CAN_UNLOAD) ) {
- stop_undi->Status = PXENV_STATUS_KEEP_UNDI;
- return PXENV_EXIT_FAILURE;
- }
-
- stop_undi->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /* PXENV_START_BASE
- *
- * Status: won't implement (requires major structural changes)
- */
- PXENV_EXIT_t pxenv_start_base ( struct s_PXENV_START_BASE *start_base ) {
- DBG ( "PXENV_START_BASE" );
- /* ENSURE_READY ( start_base ); */
- start_base->Status = PXENV_STATUS_UNSUPPORTED;
- return PXENV_EXIT_FAILURE;
- }
-
- /* PXENV_STOP_BASE
- *
- * Status: working
- */
- PXENV_EXIT_t pxenv_stop_base ( struct s_PXENV_STOP_BASE *stop_base ) {
- DBG ( "PXENV_STOP_BASE" );
-
- /* The only time we will be called is when the NBP is trying
- * to shut down the PXE stack. There's nothing we need to do
- * in this call.
- */
-
- stop_base->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
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