Rev 4369 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3993 | rimsky | 1 | /* |
| 2 | * Copyright (c) 2006 Jakub Jermar |
||
| 3 | * Copyright (c) 2009 Pavel Rimsky |
||
| 4 | * All rights reserved. |
||
| 5 | * |
||
| 6 | * Redistribution and use in source and binary forms, with or without |
||
| 7 | * modification, are permitted provided that the following conditions |
||
| 8 | * are met: |
||
| 9 | * |
||
| 10 | * - Redistributions of source code must retain the above copyright |
||
| 11 | * notice, this list of conditions and the following disclaimer. |
||
| 12 | * - Redistributions in binary form must reproduce the above copyright |
||
| 13 | * notice, this list of conditions and the following disclaimer in the |
||
| 14 | * documentation and/or other materials provided with the distribution. |
||
| 15 | * - The name of the author may not be used to endorse or promote products |
||
| 16 | * derived from this software without specific prior written permission. |
||
| 17 | * |
||
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 28 | */ |
||
| 29 | |||
| 30 | /** @addtogroup sparc64proc |
||
| 31 | * @{ |
||
| 32 | */ |
||
| 33 | /** @file |
||
| 34 | */ |
||
| 35 | |||
| 36 | #include <proc/scheduler.h> |
||
| 37 | #include <proc/thread.h> |
||
| 38 | #include <arch.h> |
||
| 39 | #include <arch/asm.h> |
||
| 40 | #include <arch/stack.h> |
||
| 41 | #include <arch/sun4v/cpu.h> |
||
| 42 | #include <arch/sun4v/hypercall.h> |
||
| 43 | |||
| 44 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
||
| 45 | void before_task_runs_arch(void) |
||
| 46 | { |
||
| 47 | } |
||
| 48 | |||
| 49 | /** Perform sparc64 specific steps before scheduling a thread. |
||
| 50 | * |
||
| 51 | * For userspace threads, initialize pointer to the kernel stack and for the |
||
| 52 | * userspace window buffer. |
||
| 53 | */ |
||
| 54 | void before_thread_runs_arch(void) |
||
| 55 | { |
||
| 56 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
||
| 57 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
||
| 58 | (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
||
| 4369 | rimsky | 59 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK, sp); |
| 60 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_WBUF, |
||
| 61 | (uintptr_t) THREAD->arch.uspace_window_buffer); |
||
| 3993 | rimsky | 62 | } |
| 63 | } |
||
| 64 | |||
| 65 | /** Perform sparc64 specific steps before a thread stops running. */ |
||
| 66 | void after_thread_ran_arch(void) |
||
| 67 | { |
||
| 68 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
||
| 69 | /* sample the state of the userspace window buffer */ |
||
| 70 | THREAD->arch.uspace_window_buffer = |
||
| 4369 | rimsky | 71 | (uint8_t *) asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_WBUF); |
| 72 | |||
| 3993 | rimsky | 73 | } |
| 74 | } |
||
| 75 | |||
| 76 | /** @} |
||
| 77 | */ |