1/* 2 **************************************************************************** 3 * (C) 2005 - Grzegorz Milos - Intel Research Cambridge 4 **************************************************************************** 5 * 6 * File: sched.c 7 * Author: Grzegorz Milos 8 * Changes: Robert Kaiser 9 * 10 * Date: Aug 2005 11 * 12 * Environment: Xen Minimal OS 13 * Description: simple scheduler for Mini-Os 14 * 15 * The scheduler is non-preemptive (cooperative), and schedules according 16 * to Round Robin algorithm. 17 * 18 **************************************************************************** 19 * Permission is hereby granted, free of charge, to any person obtaining a copy 20 * of this software and associated documentation files (the "Software"), to 21 * deal in the Software without restriction, including without limitation the 22 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 23 * sell copies of the Software, and to permit persons to whom the Software is 24 * furnished to do so, subject to the following conditions: 25 * 26 * The above copyright notice and this permission notice shall be included in 27 * all copies or substantial portions of the Software. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 30 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 31 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 32 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 33 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 34 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 35 * DEALINGS IN THE SOFTWARE. 36 */ 37 38#include <mini-os/os.h> 39#include <mini-os/hypervisor.h> 40#include <mini-os/time.h> 41#include <mini-os/mm.h> 42#include <mini-os/types.h> 43#include <mini-os/lib.h> 44#include <mini-os/semaphore.h> 45 46#include <bmk-core/memalloc.h> 47#include <bmk-core/sched.h> 48 49#if 0 50void dump_stack(struct thread *thread_md) 51{ 52 unsigned long *bottom = (unsigned long *)(thread->stack + STACK_SIZE); 53 unsigned long *pointer = (unsigned long *)thread->thr_sp; 54 int count; 55 if(thread == bmk_current) 56 { 57#ifdef __i386__ 58 asm("movl %%esp,%0" 59 : "=r"(pointer)); 60#else 61 asm("movq %%rsp,%0" 62 : "=r"(pointer)); 63#endif 64 } 65 minios_printk("The stack for \"%s\"\n", thread->name); 66 for(count = 0; count < 25 && pointer < bottom; count ++) 67 { 68 minios_printk("[0x%lx] 0x%lx\n", pointer, *pointer); 69 pointer++; 70 } 71 72 if(pointer < bottom) minios_printk(" ... continues.\n"); 73} 74#endif 75 76void 77bmk_platform_cpu_sched_settls(struct bmk_tcb *next) 78{ 79 80#if defined(__i386__) 81 tlsswitch32(next->btcb_tp); 82#else /* x86_64 */ 83 wrmsrl(0xc0000100, next->btcb_tp); 84#endif 85} 86