Rev 993 | Rev 1187 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 901 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub 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 | |||
| 29 | #include <proc/scheduler.h> |
||
| 30 | #include <proc/thread.h> |
||
| 31 | #include <arch.h> |
||
| 911 | jermar | 32 | #include <arch/register.h> |
| 912 | jermar | 33 | #include <arch/context.h> |
| 916 | jermar | 34 | #include <arch/stack.h> |
| 901 | jermar | 35 | #include <arch/mm/tlb.h> |
| 36 | #include <config.h> |
||
| 37 | #include <align.h> |
||
| 38 | |||
| 916 | jermar | 39 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
| 901 | jermar | 40 | void before_thread_runs_arch(void) |
| 41 | { |
||
| 42 | __address base; |
||
| 43 | |||
| 44 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
||
| 45 | |||
| 1138 | jermar | 46 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
| 901 | jermar | 47 | /* |
| 903 | jermar | 48 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
| 1138 | jermar | 49 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
| 901 | jermar | 50 | */ |
| 1138 | jermar | 51 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
| 52 | dtlb_kernel_mapping_insert((__address) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
||
| 901 | jermar | 53 | } |
| 903 | jermar | 54 | |
| 55 | /* |
||
| 916 | jermar | 56 | * Record address of kernel backing store to bank 0 r22. |
| 57 | * Record address of kernel stack to bank 0 r23. |
||
| 58 | * These values will be found there after switch from userspace. |
||
| 903 | jermar | 59 | */ |
| 911 | jermar | 60 | __asm__ volatile ( |
| 61 | "bsw.0\n" |
||
| 916 | jermar | 62 | "mov r22 = %0\n" |
| 63 | "mov r23 = %1\n" |
||
| 911 | jermar | 64 | "bsw.1\n" |
| 916 | jermar | 65 | : |
| 993 | jermar | 66 | : "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
| 935 | vana | 67 | "r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
| 68 | ); |
||
| 901 | jermar | 69 | } |
| 70 | |||
| 71 | void after_thread_ran_arch(void) |
||
| 72 | { |
||
| 73 | } |