Permalink
Switch branches/tags
Nothing to show
Find file
Fetching contributors…
Cannot retrieve contributors at this time
181 lines (146 sloc) 4.84 KB
/******************************************************************************
* kernel.c
*
* Assorted crap goes here, including the initial C entry point, jumped at
* from head.S.
*
* Copyright (c) 2002-2003, K A Fraser & R Neugebauer
* Copyright (c) 2005, Grzegorz Milos, Intel Research Cambridge
* Copyright (c) 2006, Robert Kaiser, FH Wiesbaden
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <mini-os/os.h>
#include <mini-os/hypervisor.h>
#include <mini-os/mm.h>
#include <mini-os/events.h>
#include <mini-os/time.h>
#include <mini-os/types.h>
#include <mini-os/lib.h>
#include <mini-os/sched.h>
#include <mini-os/xenbus.h>
#include <mini-os/gnttab.h>
#include <mini-os/netfront.h>
#include <mini-os/blkfront.h>
#include <mini-os/fbfront.h>
#include <mini-os/pcifront.h>
#include <mini-os/xmalloc.h>
#include <fcntl.h>
#include <xen/features.h>
#include <xen/version.h>
uint8_t xen_features[XENFEAT_NR_SUBMAPS * 32];
void setup_xen_features(void)
{
xen_feature_info_t fi;
int i, j;
for (i = 0; i < XENFEAT_NR_SUBMAPS; i++)
{
fi.submap_idx = i;
if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
break;
for (j=0; j<32; j++)
xen_features[i*32+j] = !!(fi.submap & 1<<j);
}
}
/* This should be overridden by the application we are linked against. */
__attribute__((weak)) int app_main(start_info_t *si)
{
printk("Dummy main: start_info=%p\n", si);
return 0;
}
/*
* INITIAL C ENTRY POINT.
*/
void start_kernel(start_info_t *si)
{
static char hello[] = "Bootstrapping...\n";
(void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(hello), hello);
arch_init(si);
trap_init();
/* print out some useful information */
printk("Xen Minimal OS!\n");
printk(" start_info: %p(VA)\n", si);
printk(" nr_pages: 0x%lx\n", si->nr_pages);
printk(" shared_inf: 0x%08lx(MA)\n", si->shared_info);
printk(" pt_base: %p(VA)\n", (void *)si->pt_base);
printk("nr_pt_frames: 0x%lx\n", si->nr_pt_frames);
printk(" mfn_list: %p(VA)\n", (void *)si->mfn_list);
printk(" mod_start: 0x%lx(VA)\n", si->mod_start);
printk(" mod_len: %lu\n", si->mod_len);
printk(" flags: 0x%x\n", (unsigned int)si->flags);
printk(" cmd_line: %s\n",
si->cmd_line ? (const char *)si->cmd_line : "NULL");
/* Set up events. */
init_events();
/* ENABLE EVENT DELIVERY. This is disabled at start of day. */
__sti();
arch_print_info();
setup_xen_features();
/* Init memory management. */
init_mm();
/* Init time and timers. */
init_time();
/* Init the console driver. */
init_console();
/* Init grant tables */
init_gnttab();
/* Init scheduler. */
init_sched();
/* Init XenBus */
init_xenbus();
/* Call (possibly overridden) app_main() */
app_main(&start_info);
/* Everything initialised, start idle thread */
run_idle_thread();
}
void stop_kernel(void)
{
/* TODO: fs import */
local_irq_disable();
/* Reset grant tables */
fini_gnttab();
/* Reset XenBus */
fini_xenbus();
/* Reset timers */
fini_time();
/* Reset memory management. */
fini_mm();
/* Reset events. */
fini_events();
/* Reset traps */
trap_fini();
/* Reset arch details */
arch_fini();
}
/*
* do_exit: This is called whenever an IRET fails in entry.S.
* This will generally be because an application has got itself into
* a really bad state (probably a bad CS or SS). It must be killed.
* Of course, minimal OS doesn't have applications :-)
*/
void do_exit(void)
{
printk("Do_exit called!\n");
stack_walk();
for( ;; )
{
struct sched_shutdown sched_shutdown = { .reason = SHUTDOWN_crash };
HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
}
}