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/*

 * Copyright (c) 2005 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/** @addtogroup ia64

 * @{

 */

/** @file

 */

#include <arch.h>

#include <arch/ski/ski.h>

#include <arch/drivers/it.h>

#include <arch/interrupt.h>

#include <arch/barrier.h>

#include <arch/asm.h>

#include <arch/register.h>

#include <arch/types.h>

#include <arch/context.h>

#include <arch/stack.h>

#include <arch/mm/page.h>

#include <mm/as.h>

#include <config.h>

#include <userspace.h>

#include <console/console.h>

#include <proc/uarg.h>

#include <syscall/syscall.h>

#include <ddi/irq.h>

#include <arch/simics/ega.h>

void arch_pre_main(void)

{

	/* Setup usermode init tasks. */

	init.cnt = 8;

	init.tasks[0].addr = INIT0_ADDRESS;

	init.tasks[0].size = INIT0_SIZE;

	init.tasks[1].addr = INIT0_ADDRESS + 0x400000;

	init.tasks[1].size = INIT0_SIZE;

	init.tasks[2].addr = INIT0_ADDRESS + 0x800000;

	init.tasks[2].size = INIT0_SIZE;

	init.tasks[3].addr = INIT0_ADDRESS + 0xc00000;

	init.tasks[3].size = INIT0_SIZE;

	init.tasks[4].addr = INIT0_ADDRESS + 0x1000000;

	init.tasks[4].size = INIT0_SIZE;

	init.tasks[5].addr = INIT0_ADDRESS + 0x1400000;

	init.tasks[5].size = INIT0_SIZE;

	init.tasks[6].addr = INIT0_ADDRESS + 0x1800000;

	init.tasks[6].size = INIT0_SIZE;

	init.tasks[7].addr = INIT0_ADDRESS + 0x1c00000;

	init.tasks[7].size = INIT0_SIZE;

}

void arch_pre_mm_init(void)

{

	/* Set Interruption Vector Address (i.e. location of interruption vector table). */

	iva_write((uintptr_t) &ivt);

	srlz_d();

}

void arch_post_mm_init(void)

{

	irq_init(INR_COUNT, INR_COUNT);

#ifdef SKI

	ski_init_console();

#else	

	ega_init();

#endif	

	it_init();	

}

void arch_post_cpu_init(void)

{

}

void arch_pre_smp_init(void)

{

}

void arch_post_smp_init(void)

{

	if (config.cpu_active == 1) {

		/*

		 * Create thread that polls keyboard.

		 */

#ifdef SKI

		thread_t *t;

		t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);

		if (!t)

			panic("cannot create kkbdpoll\n");

		thread_ready(t);

#endif		

	}

}

/** Enter userspace and never return. */

void userspace(uspace_arg_t *kernel_uarg)

{

	psr_t psr;

	rsc_t rsc;

	psr.value = psr_read();

	psr.cpl = PL_USER;

	psr.i = true;				/* start with interrupts enabled */

	psr.ic = true;

	psr.ri = 0;				/* start with instruction #0 */

	psr.bn = 1;				/* start in bank 0 */

	asm volatile ("mov %0 = ar.rsc\n" : "=r" (rsc.value));

	rsc.loadrs = 0;

	rsc.be = false;

	rsc.pl = PL_USER;

	rsc.mode = 3;				/* eager mode */

	switch_to_userspace((uintptr_t) kernel_uarg->uspace_entry,

			    ((uintptr_t) kernel_uarg->uspace_stack)+PAGE_SIZE-ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),

			    ((uintptr_t) kernel_uarg->uspace_stack)+PAGE_SIZE,

			    (uintptr_t) kernel_uarg->uspace_uarg,

			    psr.value, rsc.value);

	while (1) {

		;

	}

}

/** Set thread-local-storage pointer.

 *

 * We use r13 (a.k.a. tp) for this purpose.

 */

unative_t sys_tls_set(unative_t addr)

{

        return 0;

}

/** Acquire console back for kernel

 *

 */

void arch_grab_console(void)

{

#ifdef SKI

	ski_kbd_grab();

#endif	

}

/** Return console to userspace

 *

 */

void arch_release_console(void)

{

#ifdef SKI

	ski_kbd_release();

#endif

}

/** @}

 */