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36 jermar 1 
/*
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 * Copyright (C) 2005 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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78 jermar 29 
#include <arch.h>
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#include <arch/ski/ski.h>
435 jermar 31 
#include <arch/drivers/it.h>
470 jermar 32 
#include <arch/interrupt.h>
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#include <arch/barrier.h>
919 jermar 34 
#include <arch/asm.h>
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#include <arch/register.h>
470 jermar 36 
#include <arch/types.h>
919 jermar 37 
#include <arch/context.h>
962 jermar 38 
#include <arch/stack.h>
919 jermar 39 
#include <arch/mm/page.h>
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#include <mm/as.h>
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#include <config.h>
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#include <userspace.h>
519 vana 43 
#include <console/console.h>
1078 jermar 44 
#include <proc/uarg.h>
1121 jermar 45 
#include <syscall/syscall.h>
519 vana 46 
 
1223 jermar 47 
void arch_pre_main(void)
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{
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	/* Setup usermode init tasks. */
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	init.cnt = 2;
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	init.tasks[0].addr = INIT0_ADDRESS;
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	init.tasks[0].size = INIT0_SIZE;
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	init.tasks[1].addr = INIT1_ADDRESS;
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	init.tasks[1].size = INIT1_SIZE;
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}
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78 jermar 57 
void arch_pre_mm_init(void)
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{
470 jermar 59 
	/* Set Interruption Vector Address (i.e. location of interruption vector table). */
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	iva_write((__address) &ivt);
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	srlz_d();
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102 jermar 63 
	ski_init_console();
1223 jermar 64 
	it_init();
78 jermar 65 
}
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void arch_post_mm_init(void)
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{
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}
503 jermar 70 
 
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void arch_pre_smp_init(void)
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{
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}
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void arch_post_smp_init(void)
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{
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}
919 jermar 78 
 
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/** Enter userspace and never return. */
1078 jermar 80 
void userspace(uspace_arg_t *kernel_uarg)
919 jermar 81 
{
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	psr_t psr;
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	rsc_t rsc;
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	psr.value = psr_read();
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	psr.cpl = PL_USER;
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	psr.i = true;				/* start with interrupts enabled */
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	psr.ic = true;
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	psr.ri = 0;				/* start with instruction #0 */
993 jermar 90 
	psr.bn = 1;				/* start in bank 0 */
919 jermar 91 
 
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	__asm__ volatile ("mov %0 = ar.rsc\n" : "=r" (rsc.value));
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	rsc.loadrs = 0;
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	rsc.be = false;
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	rsc.pl = PL_USER;
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	rsc.mode = 3;				/* eager mode */
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1078 jermar 98 
	switch_to_userspace((__address) kernel_uarg->uspace_entry,
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			    ((__address) kernel_uarg->uspace_stack)+PAGE_SIZE-ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),
1168 vana 100 
			    ((__address) kernel_uarg->uspace_stack)+PAGE_SIZE,
1078 jermar 101 
			    (__address) kernel_uarg->uspace_uarg,
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			    psr.value, rsc.value);
919 jermar 103 
 
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	while (1) {
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		;
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	}
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}
1121 jermar 108 
 
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/** Set thread-local-storage pointer.
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 *
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 * We use r13 (a.k.a. tp) for this purpose.
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 */
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__native sys_tls_set(__native addr)
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{
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        return 0;
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}
1474 palkovsky 117 
 
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/** Acquire console back for kernel
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 *
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 */
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void arch_grab_console(void)
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{
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}
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/** Return console to userspace
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 *
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 */
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void arch_release_console(void)
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{
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}