mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-14 15:21:32 +00:00
Split UNDI load/unload out into undiload.c.
This commit is contained in:
Michael Brown
parent
359c888aec
commit
afc01a1a7f
189
src/arch/i386/drivers/net/undiload.c
Normal file
189
src/arch/i386/drivers/net/undiload.c
Normal file
@ -0,0 +1,189 @@
|
||||
/*
|
||||
* Copyright (C) 2007 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 <stdint.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <pxe.h>
|
||||
#include <realmode.h>
|
||||
#include <bios.h>
|
||||
#include <pnpbios.h>
|
||||
#include <gpxe/pci.h>
|
||||
#include <undi.h>
|
||||
#include <undirom.h>
|
||||
#include <undiload.h>
|
||||
|
||||
/** @file
|
||||
*
|
||||
* UNDI load/unload
|
||||
*
|
||||
*/
|
||||
|
||||
/** Parameter block for calling UNDI loader */
|
||||
static struct s_UNDI_LOADER __data16 ( undi_loader );
|
||||
#define undi_loader __use_data16 ( undi_loader )
|
||||
|
||||
/** UNDI loader entry point */
|
||||
static SEGOFF16_t __data16 ( undi_loader_entry );
|
||||
#define undi_loader_entry __use_data16 ( undi_loader_entry )
|
||||
|
||||
/**
|
||||
* Call UNDI loader to create a pixie
|
||||
*
|
||||
* @v undi UNDI device
|
||||
* @v undirom UNDI ROM
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
static int undi_load ( struct undi_device *undi, struct undi_rom *undirom ) {
|
||||
struct s_PXE ppxe;
|
||||
uint16_t fbms;
|
||||
unsigned int fbms_seg;
|
||||
uint16_t exit;
|
||||
int rc;
|
||||
|
||||
/* Set up START_UNDI parameters */
|
||||
memset ( &undi_loader, 0, sizeof ( undi_loader ) );
|
||||
undi_loader.AX = undi->pci_busdevfn;
|
||||
undi_loader.BX = undi->isapnp_csn;
|
||||
undi_loader.DX = undi->isapnp_read_port;
|
||||
undi_loader.ES = BIOS_SEG;
|
||||
undi_loader.DI = find_pnp_bios();
|
||||
|
||||
/* Allocate base memory for PXE stack */
|
||||
get_real ( fbms, BDA_SEG, BDA_FBMS );
|
||||
undi->restore_fbms = fbms;
|
||||
fbms_seg = ( fbms << 6 );
|
||||
fbms_seg -= ( ( undirom->code_size + 0x0f ) >> 4 );
|
||||
undi_loader.UNDI_CS = fbms_seg;
|
||||
fbms_seg -= ( ( undirom->data_size + 0x0f ) >> 4 );
|
||||
undi_loader.UNDI_DS = fbms_seg;
|
||||
|
||||
/* Debug info */
|
||||
DBGC ( undi, "UNDI %p loading UNDI ROM %p to CS %04x DS %04x for ",
|
||||
undi, undirom, undi_loader.UNDI_CS, undi_loader.UNDI_DS );
|
||||
if ( undi->pci_busdevfn ) {
|
||||
unsigned int bus = ( undi->pci_busdevfn >> 8 );
|
||||
unsigned int devfn = ( undi->pci_busdevfn & 0xff );
|
||||
DBGC ( undi, "PCI %02x:%02x.%x\n",
|
||||
bus, PCI_SLOT ( devfn ), PCI_FUNC ( devfn ) );
|
||||
}
|
||||
if ( undi->isapnp_csn != -1U ) {
|
||||
DBGC ( undi, "ISAPnP(%04x) CSN %04x\n",
|
||||
undi->isapnp_read_port, undi->isapnp_csn );
|
||||
}
|
||||
|
||||
/* Call loader */
|
||||
undi_loader_entry = undirom->loader_entry;
|
||||
__asm__ __volatile__ ( REAL_CODE ( "pushw %%ds\n\t"
|
||||
"pushw %%ax\n\t"
|
||||
"lcall *%c2\n\t"
|
||||
"addw $4, %%sp\n\t" )
|
||||
: "=a" ( exit )
|
||||
: "a" ( & __from_data16 ( undi_loader ) ),
|
||||
"p" ( & __from_data16 ( undi_loader_entry ) )
|
||||
: "ebx", "ecx", "edx", "esi", "edi", "ebp" );
|
||||
|
||||
/* UNDI API calls may rudely change the status of A20 and not
|
||||
* bother to restore it afterwards. Intel is known to be
|
||||
* guilty of this.
|
||||
*
|
||||
* Note that we will return to this point even if A20 gets
|
||||
* screwed up by the UNDI driver, because Etherboot always
|
||||
* resides in an even megabyte of RAM.
|
||||
*/
|
||||
gateA20_set();
|
||||
|
||||
if ( exit != PXENV_EXIT_SUCCESS ) {
|
||||
rc = -undi_loader.Status;
|
||||
if ( rc == 0 ) /* Paranoia */
|
||||
rc = -EIO;
|
||||
DBGC ( undi, "UNDI %p loader failed: %s\n",
|
||||
undi, strerror ( rc ) );
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Populate PXE device structure */
|
||||
undi->pxenv = undi_loader.PXENVptr;
|
||||
undi->ppxe = undi_loader.PXEptr;
|
||||
copy_from_real ( &ppxe, undi->ppxe.segment, undi->ppxe.offset,
|
||||
sizeof ( ppxe ) );
|
||||
undi->entry = ppxe.EntryPointSP;
|
||||
DBGC ( undi, "UNDI %p loaded PXENV+ %04x:%04x !PXE %04x:%04x "
|
||||
"entry %04x:%04x\n", undi, undi->pxenv.segment,
|
||||
undi->pxenv.offset, undi->ppxe.segment, undi->ppxe.offset,
|
||||
undi->entry.segment, undi->entry.offset );
|
||||
|
||||
/* Update free base memory counter */
|
||||
fbms = ( fbms_seg >> 6 );
|
||||
put_real ( fbms, BDA_SEG, BDA_FBMS );
|
||||
undi->fbms = fbms;
|
||||
DBGC ( undi, "UNDI %p using %dkB-%dkB\n",
|
||||
undi, undi->fbms, undi->restore_fbms );
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Call UNDI loader to create a pixie
|
||||
*
|
||||
* @v undi UNDI device
|
||||
* @v undirom UNDI ROM
|
||||
* @v pci_busdevfn PCI bus:dev.fn
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
int undi_load_pci ( struct undi_device *undi, struct undi_rom *undirom,
|
||||
unsigned int bus, unsigned int devfn ) {
|
||||
undi->pci_busdevfn = ( ( bus << 8 ) | devfn );
|
||||
undi->isapnp_csn = -1U;
|
||||
undi->isapnp_read_port = -1U;
|
||||
return undi_load ( undi, undirom );
|
||||
}
|
||||
|
||||
/**
|
||||
* Unload a pixie
|
||||
*
|
||||
* @v undi UNDI device
|
||||
* @ret rc Return status code
|
||||
*
|
||||
* Erases the PXENV+ and !PXE signatures, and frees the used base
|
||||
* memory (if possible).
|
||||
*/
|
||||
int undi_unload ( struct undi_device *undi ) {
|
||||
static uint32_t dead = 0xdeaddead;
|
||||
uint16_t fbms;
|
||||
|
||||
DBGC ( undi, "UNDI %p unloading\n", undi );
|
||||
|
||||
/* Erase signatures */
|
||||
put_real ( dead, undi->pxenv.segment, undi->pxenv.offset );
|
||||
put_real ( dead, undi->ppxe.segment, undi->ppxe.offset );
|
||||
|
||||
/* Free base memory, if possible */
|
||||
get_real ( fbms, BDA_SEG, BDA_FBMS );
|
||||
if ( fbms == undi->fbms ) {
|
||||
DBGC ( undi, "UNDI %p freeing %dkB-%dkB\n",
|
||||
undi, undi->fbms, undi->restore_fbms );
|
||||
fbms = undi->restore_fbms;
|
||||
put_real ( fbms, BDA_SEG, BDA_FBMS );
|
||||
return 0;
|
||||
} else {
|
||||
DBGC ( undi, "UNDI %p leaking %dkB-%dkB\n",
|
||||
undi, undi->fbms, undi->restore_fbms );
|
||||
return -EBUSY;
|
||||
}
|
||||
}
|
||||
14
src/arch/i386/include/undiload.h
Normal file
14
src/arch/i386/include/undiload.h
Normal file
@ -0,0 +1,14 @@
|
||||
#ifndef _UNDILOAD_H
|
||||
#define _UNDILOAD_H
|
||||
|
||||
/** @file
|
||||
*
|
||||
* UNDI load/unload
|
||||
*
|
||||
*/
|
||||
|
||||
extern int undi_load_pci ( struct undi_device *undi, struct undi_rom *undirom,
|
||||
unsigned int bus, unsigned int devfn );
|
||||
extern int undi_unload ( struct undi_device *undi );
|
||||
|
||||
#endif /* _UNDILOAD_H */
|
||||
Loading…
Reference in New Issue
Block a user