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/*
* Copyright (c) 1996-1999 The University of Utah and the Flux Group.
*
* This file is part of the OSKit Linux Glue Libraries, which are free
* software, also known as "open source;" you can redistribute them and/or
* modify them under the terms of the GNU General Public License (GPL),
* version 2, as published by the Free Software Foundation (FSF).
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Initalization routines.
*/
/* Note: oskit PAGE_MASK is bit-inverse of Linux definition */
#include <asm/page.h> /* linux PAGE_MASK def */
#include <oskit/dev/isa.h>
#include <oskit/dev/native.h>
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <asm/system.h>
#define trunc_page(x) ((x) & PAGE_MASK)
#define round_page(x) (((x)+ ~PAGE_MASK) & PAGE_MASK)
#include "init.h"
#include "sched.h"
#include "shared.h"
#include "osenv.h"
#define PHYS_BIOS_START 0xe0000
unsigned BIOS_START; /* VA for BIOS */
#define BIOS_SIZE 0x20000
#if 0
#define DEBUG_MSG() osenv_log(OSENV_LOG_DEBUG,"%s:%d:\n", __FILE__, __LINE__);
#else
#define DEBUG_MSG()
#endif
/*
* Set if the machine has an EISA bus. Note, this can be a macro that
* hardwires EISA_bus on or off.
*/
#ifndef OSKIT_ARM32_SHARK
int EISA_bus = 0;
#endif
/*
* Hard drive parameters obtained from the BIOS.
*/
struct drive_info_struct {
char dummy[32];
} drive_info;
/*
* Linux initialization.
*/
oskit_error_t
oskit_linux_dev_init(void)
{
static int inited = 0;
char *p;
oskit_addr_t addr, x;
void *kaddr;
struct task_struct ts;
if (inited)
return 0;
inited = 1;
oskit_linux_init();
linux_intr_init();
OSKIT_LINUX_CREATE_CURRENT(ts);
/*
* Register the Linux clock interrupt handler.
*/
osenv_timer_register(linux_timer_intr, HZ);
current = &ts; /* restore current pointer after possibly blocking */
#ifndef OSKIT_ARM32_SHARK
/*
* Check if the machine has an EISA bus.
*/
/* Map the 128k BIOS region. kvtophys() should equate
* BIOS_START & PHYS_BIOS_START, but just in case, we
* track them both.
*/
if (osenv_mem_map_phys(PHYS_BIOS_START, BIOS_SIZE,
(void**)&BIOS_START, 0))
panic("linux_init: unable to map physical memory");
osenv_log(OSENV_LOG_DEBUG, "BIOS mapped to 0x%x\n", BIOS_START);
kaddr = (void *) (BIOS_START + trunc_page(0xFFFD9) - PHYS_BIOS_START);
current = &ts; /* restore current pointer after possibly blocking */
p = kaddr + (0xFFFD9 & (~PAGE_MASK));
if (*p++ == 'E' && *p++ == 'I' && *p++ == 'S' && *p == 'A')
EISA_bus = 1;
#endif
/*
* Install software interrupt handlers.
*/
init_bh(TIMER_BH, timer_bh);
init_bh(TQUEUE_BH, tqueue_bh);
init_bh(IMMEDIATE_BH, immediate_bh);
#ifndef OSKIT_ARM32_SHARK
/*
* Initialize drive info.
*/
if (osenv_mem_map_phys(0, PAGE_SIZE, &kaddr, 0))
panic("%s:%d: unable to map phys memory", __FILE__, __LINE__);
x = *((unsigned *)(kaddr + 0x104));
addr = ((x >> 12) & 0xFFFF0) + (x & 0xFFFF);
if (osenv_mem_map_phys(trunc_page(addr), PAGE_SIZE, (void **)&x, 0))
panic("%s:%d: unable to map phys memory", __FILE__, __LINE__);
memcpy(&drive_info, (void *)(x + (addr & (~PAGE_MASK))), 16);
x = *((unsigned *)(kaddr + 0x118));
addr = ((x >> 12) & 0xFFFF0) + (x & 0xFFFF);
if (osenv_mem_map_phys(trunc_page(addr), PAGE_SIZE, (void **)&x, 0))
panic("%s:%d: unable to map phys memory", __FILE__, __LINE__);
memcpy((char *)&drive_info + 16,
(void *)(x + (addr & (~PAGE_MASK))), 16);
current = &ts; /* restore current pointer after possibly blocking */
#endif
DEBUG_MSG();
/*
* Allocate contiguous memory.
*/
#ifndef OSKIT_ARM32_SHARK
#ifdef CONFIG_PCI
/*
* Initialize PCI bus.
*/
pci_init();
DEBUG_MSG();
#endif /* CONFIG_PCI */
#endif
DEBUG_MSG();
#ifdef CPUNITS
/*
* There really isn't anything to do - all that device_setup is
* going to do is fiddle around and, eventually, reenable
* interrupts. We can cut out the middle-man and avoid
* hideous dependencies.
*/
#else
/*
* Initialize devices.
*/
osenv_intr_disable();
/* XXX shouldn't need the full genhd.c at all */
device_setup();
#endif
OSKIT_LINUX_DESTROY_CURRENT();
return 0;
}
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