Rev 2071 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 901 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 901 | jermar | 3 | * All rights reserved. |
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 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. |
||
| 16 | * |
||
| 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. |
||
| 27 | */ |
||
| 28 | |||
| 1888 | jermar | 29 | /** @addtogroup ia64proc |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
||
| 32 | /** @file |
||
| 33 | */ |
||
| 34 | |||
| 901 | jermar | 35 | #include <proc/scheduler.h> |
| 36 | #include <proc/thread.h> |
||
| 37 | #include <arch.h> |
||
| 911 | jermar | 38 | #include <arch/register.h> |
| 912 | jermar | 39 | #include <arch/context.h> |
| 916 | jermar | 40 | #include <arch/stack.h> |
| 901 | jermar | 41 | #include <arch/mm/tlb.h> |
| 42 | #include <config.h> |
||
| 43 | #include <align.h> |
||
| 44 | |||
| 1187 | jermar | 45 | /** Perform ia64 specific tasks needed before the new task is run. */ |
| 46 | void before_task_runs_arch(void) |
||
| 47 | { |
||
| 48 | } |
||
| 49 | |||
| 916 | jermar | 50 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
| 901 | jermar | 51 | void before_thread_runs_arch(void) |
| 52 | { |
||
| 1780 | jermar | 53 | uintptr_t base; |
| 901 | jermar | 54 | |
| 55 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
||
| 56 | |||
| 1780 | jermar | 57 | if ((uintptr_t) THREAD->kstack < base || (uintptr_t) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
| 901 | jermar | 58 | /* |
| 903 | jermar | 59 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
| 1138 | jermar | 60 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
| 901 | jermar | 61 | */ |
| 1675 | jermar | 62 | |
| 63 | /* purge DTR[TR_STACK1] and DTR[TR_STACK2] */ |
||
| 1780 | jermar | 64 | dtr_purge((uintptr_t) THREAD->kstack, PAGE_WIDTH+1); |
| 1675 | jermar | 65 | |
| 66 | /* insert DTR[TR_STACK1] and DTR[TR_STACK2] */ |
||
| 1780 | jermar | 67 | dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
| 68 | dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
||
| 901 | jermar | 69 | } |
| 903 | jermar | 70 | |
| 71 | /* |
||
| 916 | jermar | 72 | * Record address of kernel backing store to bank 0 r22. |
| 73 | * Record address of kernel stack to bank 0 r23. |
||
| 74 | * These values will be found there after switch from userspace. |
||
| 903 | jermar | 75 | */ |
| 2082 | decky | 76 | asm volatile ( |
| 911 | jermar | 77 | "bsw.0\n" |
| 916 | jermar | 78 | "mov r22 = %0\n" |
| 79 | "mov r23 = %1\n" |
||
| 911 | jermar | 80 | "bsw.1\n" |
| 916 | jermar | 81 | : |
| 993 | jermar | 82 | : "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
| 935 | vana | 83 | "r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
| 84 | ); |
||
| 901 | jermar | 85 | } |
| 86 | |||
| 87 | void after_thread_ran_arch(void) |
||
| 88 | { |
||
| 89 | } |
||
| 1702 | cejka | 90 | |
| 1888 | jermar | 91 | /** @} |
| 1702 | cejka | 92 | */ |