| 0,0 → 1,93 |
|---|
| /* |
| * 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. |
| */ |
| |
| /** @addtogroup ia64proc |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #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) |
| { |
| uintptr_t base; |
| |
| base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
| |
| if ((uintptr_t) THREAD->kstack < base || (uintptr_t) 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((uintptr_t) THREAD->kstack, PAGE_WIDTH+1); |
| |
| /* insert DTR[TR_STACK1] and DTR[TR_STACK2] */ |
| dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
| dtlb_kernel_mapping_insert((uintptr_t) 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) |
| { |
| } |
| |
| /** @} |
| */ |
| |