Rev 2927 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2927 | Rev 4338 | ||
|---|---|---|---|
| Line 45... | Line 45... | ||
| 45 | /** Perform ia64 specific tasks needed before the new task is run. */ |
45 | /** Perform ia64 specific tasks needed before the new task is run. */ |
| 46 | void before_task_runs_arch(void) |
46 | void before_task_runs_arch(void) |
| 47 | { |
47 | { |
| 48 | } |
48 | } |
| 49 | 49 | ||
| 50 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
50 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack |
| - | 51 | * is mapped in DTR. |
|
| - | 52 | */ |
|
| 51 | void before_thread_runs_arch(void) |
53 | void before_thread_runs_arch(void) |
| 52 | { |
54 | { |
| 53 | uintptr_t base; |
55 | uintptr_t base; |
| 54 | 56 | ||
| 55 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
57 | base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH); |
| 56 | 58 | ||
| - | 59 | if ((uintptr_t) THREAD->kstack < base || |
|
| 57 | if ((uintptr_t) THREAD->kstack < base || (uintptr_t) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
60 | (uintptr_t) THREAD->kstack > base + (1 << (KERNEL_PAGE_WIDTH))) { |
| 58 | /* |
61 | /* |
| 59 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
62 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
| 60 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
63 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
| 61 | */ |
64 | */ |
| 62 | 65 | ||
| 63 | /* purge DTR[TR_STACK1] and DTR[TR_STACK2] */ |
66 | /* purge DTR[TR_STACK1] and DTR[TR_STACK2] */ |
| 64 | dtr_purge((uintptr_t) THREAD->kstack, PAGE_WIDTH+1); |
67 | dtr_purge((uintptr_t) THREAD->kstack, PAGE_WIDTH+1); |
| 65 | 68 | ||
| 66 | /* insert DTR[TR_STACK1] and DTR[TR_STACK2] */ |
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); |
|
| 67 | dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
72 | dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack + |
| 68 | dtlb_kernel_mapping_insert((uintptr_t) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
73 | PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, |
| - | 74 | DTR_KSTACK2); |
|
| 69 | } |
75 | } |
| 70 | 76 | ||
| 71 | /* |
77 | /* |
| 72 | * Record address of kernel backing store to bank 0 r22. |
78 | * Record address of kernel backing store to bank 0 r22. |
| 73 | * Record address of kernel stack to bank 0 r23. |
79 | * Record address of kernel stack to bank 0 r23. |