0,0 → 1,83 |
/* |
* Copyright (C) 2006 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. |
*/ |
|
#include <proc/scheduler.h> |
#include <proc/thread.h> |
#include <arch.h> |
#include <arch/register.h> |
#include <arch/context.h> |
#include <arch/stack.h> |
#include <arch/mm/tlb.h> |
#include <config.h> |
#include <align.h> |
|
/** Perform ia64 specific tasks needed before the new task is run. */ |
void before_task_runs_arch(void) |
{ |
} |
|
/** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
void before_thread_runs_arch(void) |
{ |
__address base; |
|
base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
|
if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
/* |
* Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
* Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
*/ |
|
/* purge DTR[TR_STACK1] and DTR[TR_STACK2] */ |
dtr_purge((__address) THREAD->kstack, PAGE_WIDTH+1); |
|
/* insert DTR[TR_STACK1] and DTR[TR_STACK2] */ |
dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
dtlb_kernel_mapping_insert((__address) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
} |
|
/* |
* Record address of kernel backing store to bank 0 r22. |
* Record address of kernel stack to bank 0 r23. |
* These values will be found there after switch from userspace. |
*/ |
__asm__ volatile ( |
"bsw.0\n" |
"mov r22 = %0\n" |
"mov r23 = %1\n" |
"bsw.1\n" |
: |
: "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
"r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
); |
} |
|
void after_thread_ran_arch(void) |
{ |
} |