kernel/arch/sparc64/src/sparc64.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 sparc64
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #include <arch.h>
  36 #include <debug.h>
  37 #include <config.h>
  38 #include <arch/trap/trap.h>
  39 #include <arch/console.h>
  40 #include <proc/thread.h>
  41 #include <console/console.h>
  42 #include <arch/boot/boot.h>
  43 #include <arch/arch.h>
  44 #include <arch/asm.h>
  45 #include <arch/mm/page.h>
  46 #include <arch/stack.h>
  47 #include <genarch/ofw/ofw_tree.h>
  48 #include <userspace.h>
  49 #include <ddi/irq.h>
  50
  51 bootinfo_t bootinfo;
  52
  53 /** Perform sparc64 specific initialization before main_bsp() is called. */
  54 void arch_pre_main(void)
  55 {
  56         /* Copy init task info. */
  57         init.cnt = bootinfo.taskmap.count;
  58
  59         uint32_t i;
  60
  61         for (i = 0; i < bootinfo.taskmap.count; i++) {
  62                 init.tasks[i].addr = (uintptr_t) bootinfo.taskmap.tasks[i].addr;
  63                 init.tasks[i].size = bootinfo.taskmap.tasks[i].size;
  64         }
  65
  66         /* Copy boot allocations info. */
  67         ballocs.base = bootinfo.ballocs.base;
  68         ballocs.size = bootinfo.ballocs.size;
  69
  70         ofw_tree_init(bootinfo.ofw_root);
  71 }
  72
  73 /** Perform sparc64 specific initialization before mm is initialized. */
  74 void arch_pre_mm_init(void)
  75 {
  76         if (config.cpu_active == 1)
  77                 trap_init();
  78 }
  79
  80 /** Perform sparc64 specific initialization afterr mm is initialized. */
  81 void arch_post_mm_init(void)
  82 {
  83         if (config.cpu_active == 1) {
  84                 /*
  85                  * We have 2^11 different interrupt vectors.
  86                  * But we only create 128 buckets.
  87                  */
  88                 irq_init(1 << 11, 128);
  89
  90                 standalone_sparc64_console_init();
  91         }
  92 }
  93
  94 void arch_post_cpu_init(void)
  95 {
  96 }
  97
  98 void arch_pre_smp_init(void)
  99 {
 100 }
 101
 102 void arch_post_smp_init(void)
 103 {
 104         static thread_t *t = NULL;
 105
 106
 107         if (!t) {
 108                 /*
 109                  * Create thread that polls keyboard.
 110                  */
 111                 t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);
 112                 if (!t)
 113                         panic("cannot create kkbdpoll\n");
 114                 thread_ready(t);
 115         }
 116 }
 117
 118 /** Calibrate delay loop.
 119  *
 120  * On sparc64, we implement delay() by waiting for the TICK register to
 121  * reach a pre-computed value, as opposed to performing some pre-computed
 122  * amount of instructions of known duration. We set the delay_loop_const
 123  * to 1 in order to neutralize the multiplication done by delay().
 124  */
 125 void calibrate_delay_loop(void)
 126 {
 127         CPU->delay_loop_const = 1;
 128 }
 129
 130 /** Wait several microseconds.
 131  *
 132  * We assume that interrupts are already disabled.
 133  *
 134  * @param t Microseconds to wait.
 135  */
 136 void asm_delay_loop(const uint32_t usec)
 137 {
 138         uint64_t stop = tick_read() + (uint64_t) usec * (uint64_t)
 139             CPU->arch.clock_frequency / 1000000;
 140
 141         while (tick_read() < stop)
 142                 ;
 143 }
 144
 145 /** Switch to userspace. */
 146 void userspace(uspace_arg_t *kernel_uarg)
 147 {
 148         switch_to_userspace((uintptr_t) kernel_uarg->uspace_entry,
 149             ((uintptr_t) kernel_uarg->uspace_stack) + STACK_SIZE
 150             - (ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT) + STACK_BIAS),
 151             (uintptr_t) kernel_uarg->uspace_uarg);
 152
 153         for (;;)
 154                 ;
 155         /* not reached */
 156 }
 157
 158 /** @}
 159  */