kernel/arch/ia64/src/ia64.c

   1 /*
   2  * Copyright (c) 2005 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 /** @addtogroup ia64
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #include <arch.h>
  36 #include <arch/ski/ski.h>
  37 #include <arch/drivers/it.h>
  38 #include <arch/interrupt.h>
  39 #include <arch/barrier.h>
  40 #include <arch/asm.h>
  41 #include <arch/register.h>
  42 #include <arch/types.h>
  43 #include <arch/context.h>
  44 #include <arch/stack.h>
  45 #include <arch/mm/page.h>
  46 #include <mm/as.h>
  47 #include <config.h>
  48 #include <userspace.h>
  49 #include <console/console.h>
  50 #include <proc/uarg.h>
  51 #include <syscall/syscall.h>
  52 #include <ddi/irq.h>
  53 #include <arch/simics/ega.h>
  54
  55 void arch_pre_main(void)
  56 {
  57         /* Setup usermode init tasks. */
  58         init.cnt = 8;
  59         init.tasks[0].addr = INIT0_ADDRESS;
  60         init.tasks[0].size = INIT0_SIZE;
  61         init.tasks[1].addr = INIT0_ADDRESS + 0x400000;
  62         init.tasks[1].size = INIT0_SIZE;
  63         init.tasks[2].addr = INIT0_ADDRESS + 0x800000;
  64         init.tasks[2].size = INIT0_SIZE;
  65         init.tasks[3].addr = INIT0_ADDRESS + 0xc00000;
  66         init.tasks[3].size = INIT0_SIZE;
  67         init.tasks[4].addr = INIT0_ADDRESS + 0x1000000;
  68         init.tasks[4].size = INIT0_SIZE;
  69         init.tasks[5].addr = INIT0_ADDRESS + 0x1400000;
  70         init.tasks[5].size = INIT0_SIZE;
  71         init.tasks[6].addr = INIT0_ADDRESS + 0x1800000;
  72         init.tasks[6].size = INIT0_SIZE;
  73         init.tasks[7].addr = INIT0_ADDRESS + 0x1c00000;
  74         init.tasks[7].size = INIT0_SIZE;
  75 }
  76
  77 void arch_pre_mm_init(void)
  78 {
  79         /* Set Interruption Vector Address (i.e. location of interruption vector table). */
  80         iva_write((uintptr_t) &ivt);
  81         srlz_d();
  82
  83 }
  84
  85
  86
  87 void arch_post_mm_init(void)
  88 {
  89         irq_init(INR_COUNT, INR_COUNT);
  90 #ifdef SKI
  91         ski_init_console();
  92 #else
  93         ega_init();
  94 #endif
  95         it_init();
  96 }
  97
  98 void arch_post_cpu_init(void)
  99 {
 100 }
 101
 102 void arch_pre_smp_init(void)
 103 {
 104 }
 105
 106 void arch_post_smp_init(void)
 107 {
 108
 109         if (config.cpu_active == 1) {
 110                 /*
 111                  * Create thread that polls keyboard.
 112                  */
 113 #ifdef SKI
 114                 thread_t *t;
 115                 t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);
 116                 if (!t)
 117                         panic("cannot create kkbdpoll\n");
 118                 thread_ready(t);
 119 #endif
 120         }
 121 }
 122
 123 /** Enter userspace and never return. */
 124 void userspace(uspace_arg_t *kernel_uarg)
 125 {
 126         psr_t psr;
 127         rsc_t rsc;
 128
 129         psr.value = psr_read();
 130         psr.cpl = PL_USER;
 131         psr.i = true;                           /* start with interrupts enabled */
 132         psr.ic = true;
 133         psr.ri = 0;                             /* start with instruction #0 */
 134         psr.bn = 1;                             /* start in bank 0 */
 135
 136         __asm__ volatile ("mov %0 = ar.rsc\n" : "=r" (rsc.value));
 137         rsc.loadrs = 0;
 138         rsc.be = false;
 139         rsc.pl = PL_USER;
 140         rsc.mode = 3;                           /* eager mode */
 141
 142         switch_to_userspace((uintptr_t) kernel_uarg->uspace_entry,
 143                             ((uintptr_t) kernel_uarg->uspace_stack)+PAGE_SIZE-ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),
 144                             ((uintptr_t) kernel_uarg->uspace_stack)+PAGE_SIZE,
 145                             (uintptr_t) kernel_uarg->uspace_uarg,
 146                             psr.value, rsc.value);
 147
 148         while (1) {
 149                 ;
 150         }
 151 }
 152
 153 /** Set thread-local-storage pointer.
 154  *
 155  * We use r13 (a.k.a. tp) for this purpose.
 156  */
 157 unative_t sys_tls_set(unative_t addr)
 158 {
 159         return 0;
 160 }
 161
 162 /** Acquire console back for kernel
 163  *
 164  */
 165 void arch_grab_console(void)
 166 {
 167 #ifdef SKI
 168         ski_kbd_grab();
 169 #endif
 170 }
 171 /** Return console to userspace
 172  *
 173  */
 174 void arch_release_console(void)
 175 {
 176 #ifdef SKI
 177         ski_kbd_release();
 178 #endif
 179 }
 180
 181 /** @}
 182  */