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Add (untested) UNDI loader C-level implementation.
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src
@ -298,6 +298,31 @@ void pxe_api_call ( struct i386_all_regs *ix86 ) {
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ix86->regs.ax = ret;
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}
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/**
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* Dispatch PXE loader call
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*
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* @v es:di Address of PXE parameter block
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* @ret ax PXE exit code
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*/
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void pxe_loader_call ( struct i386_all_regs *ix86 ) {
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userptr_t uparams = real_to_user ( ix86->segs.es, ix86->regs.di );
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struct s_UNDI_LOADER params;
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PXENV_EXIT_t ret;
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/* Copy parameter block from caller */
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copy_from_user ( ¶ms, uparams, 0, sizeof ( params ) );
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/* Set default status in case child routine fails to do so */
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params.Status = PXENV_STATUS_FAILURE;
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/* Call UNDI loader */
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ret = undi_loader ( ¶ms );
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/* Copy modified parameter block back to caller and return */
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copy_to_user ( uparams, 0, ¶ms, sizeof ( params ) );
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ix86->regs.ax = ret;
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}
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/**
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* Hook INT 1A for PXE
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*
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@ -1,11 +1,5 @@
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/** @file
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*
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* PXE UNDI loader
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*
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*/
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/*
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* Copyright (C) 2004 Michael Brown <mbrown@fensystems.co.uk>.
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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@ -22,65 +16,37 @@
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#warning "Currently broken"
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#if 0
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#include <gpxe/init.h>
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#include "pxe.h"
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#include "pxe_call.h"
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/** @file
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*
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* PXE UNDI loader
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*
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*/
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/* PXENV_UNDI_LOADER
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*
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* Status: working
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*
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* NOTE: This is not a genuine PXE API call; the loader has a separate
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* entry point. However, to simplify the mapping of the PXE API to
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* the internal Etherboot API, both are directed through the same
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* interface.
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*/
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PXENV_EXIT_t undi_loader ( struct s_UNDI_LOADER *undi_loader ) {
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uint32_t loader_phys = virt_to_phys ( undi_loader );
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DBG ( "PXENV_UNDI_LOADER" );
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/* Set UNDI DS as our real-mode stack */
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use_undi_ds_for_rm_stack ( undi_loader->undi_ds );
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DBG ( "[PXENV_UNDI_LOADER]" );
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/* FIXME: These lines are borrowed from main.c. There should
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* probably be a single initialise() function that does all
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* this, but it's currently split interestingly between main()
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* and main_loop()...
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*/
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/* Perform one-time initialisation (e.g. heap) */
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initialise();
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/* Set up PXE data structures */
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pxe_init_structures();
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/* CHECKME: Our init functions have probably already been
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called by the ROM prefix's call to setup(), haven't
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they? */
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/* Fill in UNDI loader structure */
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undi_loader->PXEptr.segment = rm_ds;
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undi_loader->PXEptr.offset =
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( ( unsigned ) & __from_text16 ( ppxe ) );
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undi_loader->PXENVptr.segment = rm_ds;
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undi_loader->PXENVptr.offset =
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( ( unsigned ) & __from_text16 ( pxenv ) );
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/* We have relocated; the loader pointer is now invalid */
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undi_loader = phys_to_virt ( loader_phys );
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/* Install PXE stack to area specified by NBP */
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install_pxe_stack ( VIRTUAL ( undi_loader->undi_cs, 0 ) );
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/* Call pxenv_start_undi to set parameters. Why the hell PXE
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* requires these parameters to be provided twice is beyond
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* the wit of any sane man. Don't worry if it fails; the NBP
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* should call PXENV_START_UNDI separately anyway.
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*/
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pxenv_start_undi ( &undi_loader->u.start_undi );
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/* Unhook stack; the loader is not meant to hook int 1a etc,
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* but the call the pxenv_start_undi will cause it to happen.
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*/
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/* FIXME: can't use ENSURE_CAN_UNLOAD() thanks to newer gcc's
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* barfing on unnamed struct/unions. */
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/* ENSURE_CAN_UNLOAD ( undi_loader ); */
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/* Fill in addresses of !PXE and PXENV+ structures */
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PTR_TO_SEGOFF16 ( &pxe_stack->pxe, undi_loader->pxe_ptr );
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PTR_TO_SEGOFF16 ( &pxe_stack->pxenv, undi_loader->pxenv_ptr );
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undi_loader->u.Status = PXENV_STATUS_SUCCESS;
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undi_loader->Status = PXENV_STATUS_SUCCESS;
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return PXENV_EXIT_SUCCESS;
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}
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#endif
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@ -45,6 +45,9 @@
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*/
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static char *pxe_ris_filename = NULL;
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/* Avoid dragging in isapnp.o unnecessarily */
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uint16_t isapnp_read_port;
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/**
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* UNLOAD BASE CODE STACK
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*
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@ -180,9 +183,6 @@ PXENV_EXIT_t pxenv_restart_tftp ( struct s_PXENV_TFTP_READ_FILE
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* Status: working
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*/
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PXENV_EXIT_t pxenv_start_undi ( struct s_PXENV_START_UNDI *start_undi ) {
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unsigned int isapnp_read_port;
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unsigned int isapnp_csn;
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unsigned int pci_busdevfn;
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unsigned int bus_type;
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unsigned int location;
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struct net_device *netdev;
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@ -190,26 +190,25 @@ PXENV_EXIT_t pxenv_start_undi ( struct s_PXENV_START_UNDI *start_undi ) {
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DBG ( "PXENV_START_UNDI %04x:%04x:%04x",
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start_undi->AX, start_undi->BX, start_undi->DX );
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/* Probe for devices, etc. */
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startup();
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/* Determine bus type and location */
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isapnp_read_port = start_undi->DX;
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isapnp_csn = start_undi->BX;
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pci_busdevfn = start_undi->AX;
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/* Use a heuristic to decide whether we are PCI or ISAPnP */
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if ( ( isapnp_read_port >= ISAPNP_READ_PORT_MIN ) &&
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( isapnp_read_port <= ISAPNP_READ_PORT_MAX ) &&
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( isapnp_csn >= ISAPNP_CSN_MIN ) &&
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( isapnp_csn <= ISAPNP_CSN_MAX ) ) {
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/* Determine bus type and location. Use a heuristic to decide
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* whether we are PCI or ISAPnP
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*/
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if ( ( start_undi->DX >= ISAPNP_READ_PORT_MIN ) &&
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( start_undi->DX <= ISAPNP_READ_PORT_MAX ) &&
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( start_undi->BX >= ISAPNP_CSN_MIN ) &&
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( start_undi->BX <= ISAPNP_CSN_MAX ) ) {
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bus_type = BUS_TYPE_ISAPNP;
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location = isapnp_csn;
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location = start_undi->BX;
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/* Record ISAPnP read port for use by isapnp.c */
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isapnp_read_port = start_undi->DX;
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} else {
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bus_type = BUS_TYPE_PCI;
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location = pci_busdevfn;
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location = start_undi->AX;
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}
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/* Probe for devices, etc. */
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startup();
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/* Look for a matching net device */
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netdev = find_netdev_by_location ( bus_type, location );
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if ( ! netdev ) {
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