2
* Copyright (c) 2006 Jakub Jermar
5
* Redistribution and use in source and binary forms, with or without
6
* modification, are permitted provided that the following conditions
9
* - Redistributions of source code must retain the above copyright
10
* notice, this list of conditions and the following disclaimer.
11
* - Redistributions in binary form must reproduce the above copyright
12
* notice, this list of conditions and the following disclaimer in the
13
* documentation and/or other materials provided with the distribution.
14
* - The name of the author may not be used to endorse or promote products
15
* derived from this software without specific prior written permission.
17
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
/** @addtogroup ia64proc
35
#include <proc/scheduler.h>
36
#include <proc/thread.h>
38
#include <arch/register.h>
39
#include <arch/context.h>
40
#include <arch/stack.h>
41
#include <arch/mm/tlb.h>
45
/** Perform ia64 specific tasks needed before the new task is run. */
46
void before_task_runs_arch(void)
50
/** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack
53
void before_thread_runs_arch(void)
57
base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
59
if ((uintptr_t) THREAD->kstack < base ||
60
(uintptr_t) THREAD->kstack > base + (1 << (KERNEL_PAGE_WIDTH))) {
62
* Kernel stack of this thread is not mapped by DTR[TR_KERNEL].
63
* Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it.
66
/* purge DTR[TR_STACK1] and DTR[TR_STACK2] */
67
dtr_purge((uintptr_t) THREAD->kstack, PAGE_WIDTH+1);
69
/* insert DTR[TR_STACK1] and DTR[TR_STACK2] */
70
dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack,
71
KA2PA(THREAD->kstack), true, DTR_KSTACK1);
72
dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack +
73
PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true,
78
* Record address of kernel backing store to bank 0 r22.
79
* Record address of kernel stack to bank 0 r23.
80
* These values will be found there after switch from userspace.
88
: "r" (&THREAD->kstack[THREAD_STACK_SIZE]),
89
"r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA])
93
void after_thread_ran_arch(void)