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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 <ddi/device.h>

#include <arch/bootinfo.h>

#include <arch/drivers/ega.h>

#include <genarch/drivers/ega/ega.h>

#include <genarch/kbd/i8042.h>

#include <genarch/kbd/ns16550.h>

#include <smp/smp.h>

#include <smp/ipi.h>

#include <arch/atomic.h>

#include <panic.h>

#include <print.h>

#include <sysinfo/sysinfo.h>

/* NS16550 as a COM 1 */

#define NS16550_IRQ	(4 + LEGACY_INTERRUPT_BASE)

#define NS16550_PORT	0x3f8

bootinfo_t *bootinfo;

static uint64_t iosapic_base = 0xfec00000;

void arch_pre_main(void)

{

	/* Setup usermode init tasks. */

	unsigned int i;

	init.cnt = bootinfo->taskmap.count;

	for (i = 0; i < init.cnt; i++) {

		init.tasks[i].addr =

		    ((unsigned long) bootinfo->taskmap.tasks[i].addr) |

		    VRN_MASK;

		init.tasks[i].size = bootinfo->taskmap.tasks[i].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();

}

static void iosapic_init(void)

{

	uint64_t IOSAPIC = PA2KA((unative_t)(iosapic_base)) | FW_OFFSET;

	int i;

	int myid, myeid;

	myid = ia64_get_cpu_id();

	myeid = ia64_get_cpu_eid();

	for (i = 0; i < 16; i++) { 

		if (i == 2)

			continue;	 /* Disable Cascade interrupt */

		((uint32_t *)(IOSAPIC + 0x00))[0] = 0x10 + 2 * i;

		srlz_d();

		((uint32_t *)(IOSAPIC + 0x10))[0] = LEGACY_INTERRUPT_BASE + i;

		srlz_d();

		((uint32_t *)(IOSAPIC + 0x00))[0] = 0x10 + 2 * i + 1;

		srlz_d();

		((uint32_t *)(IOSAPIC + 0x10))[0] = myid << (56 - 32) |

		    myeid << (48 - 32);

		srlz_d();

	}

}

void arch_post_mm_init(void)

{

	if (config.cpu_active == 1) {

		iosapic_init();

		irq_init(INR_COUNT, INR_COUNT);

#ifdef SKI

		ski_init_console();

#else

		ega_init(EGA_BASE, EGA_VIDEORAM);

#endif

	}

	it_init();

}

void arch_post_cpu_init(void)

{

}

void arch_pre_smp_init(void)

{

}

void arch_post_smp_init(void)

{

	/*

	 * Create thread that polls keyboard.

	 */

#ifdef SKI

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

	if (!t)

		panic("Cannot create kkbdpoll.");

	thread_ready(t);

#endif		

#ifdef I460GX

	devno_t kbd = device_assign_devno();

#ifdef CONFIG_NS16550

	ns16550_init(kbd, NS16550_PORT, NS16550_IRQ, NULL, NULL);

#else

	devno_t mouse = device_assign_devno();

	i8042_init(kbd, IRQ_KBD, mouse, IRQ_MOUSE);

#endif

#endif

	sysinfo_set_item_val("ia64_iospace", NULL, true);

	sysinfo_set_item_val("ia64_iospace.address", NULL, true);

	sysinfo_set_item_val("ia64_iospace.address.virtual", NULL, IO_OFFSET);

}

/** 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();

#else

#ifdef CONFIG_NS16550

	ns16550_grab();

#else

	i8042_grab();

#endif

#endif

}

/** Return console to userspace

 *

 */

void arch_release_console(void)

{

#ifdef SKI

	ski_kbd_release();

#else

#ifdef CONFIG_NS16550

	ns16550_release();

#else

	i8042_release();

#endif

#endif

}

void arch_reboot(void)

{

	pio_write_8(0x64, 0xfe);

	while (1)

		;

}

/** Construct function pointer

 *

 * @param fptr   function pointer structure

 * @param addr   function address

 * @param caller calling function address

 *

 * @return address of the function pointer

 *

 */

void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)

{

	fptr->fnc = (unative_t) addr;

	fptr->gp = ((unative_t *) caller)[1];

	return (void *) fptr;

}

/** @}

 */