Subversion Repositories HelenOS-historic

Rev

Rev 1066 | Rev 1112 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1 
/*
319 jermar 2 
 * Copyright (C) 2003-2004 Jakub Jermar
1 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 
 
575 palkovsky 29 
 
1 jermar 30 
#include <arch.h>
31 
#include <arch/cp0.h>
32 
#include <arch/exception.h>
313 palkovsky 33 
#include <arch/asm.h>
703 jermar 34 
#include <mm/as.h>
575 palkovsky 35 
 
313 palkovsky 36 
#include <userspace.h>
324 palkovsky 37 
#include <arch/console.h>
326 palkovsky 38 
#include <memstr.h>
391 jermar 39 
#include <proc/thread.h>
1078 jermar 40 
#include <proc/uarg.h>
330 palkovsky 41 
#include <print.h>
42 
 
575 palkovsky 43 
#include <arch/interrupt.h>
44 
#include <arch/drivers/arc.h>
45 
#include <console/chardev.h>
614 palkovsky 46 
#include <arch/debugger.h>
575 palkovsky 47 
 
48 
#include <arch/asm/regname.h>
49 
 
326 palkovsky 50 
/* Size of the code jumping to the exception handler code
51 
 * - J+NOP
52 
 */
53 
#define EXCEPTION_JUMP_SIZE    8
54 
 
55 
#define TLB_EXC ((char *) 0x80000000)
56 
#define NORM_EXC ((char *) 0x80000180)
57 
#define CACHE_EXC ((char *) 0x80000100)
58 
 
26 jermar 59 
void arch_pre_mm_init(void)
1 jermar 60 
{
329 palkovsky 61 
    /* It is not assumed by default */
413 jermar 62 
    interrupts_disable();
575 palkovsky 63 
 
64 
    /* Initialize dispatch table */
590 palkovsky 65 
    exception_init();
575 palkovsky 66 
    interrupt_init();
329 palkovsky 67 
 
573 palkovsky 68 
    arc_init();
332 palkovsky 69 
 
326 palkovsky 70 
    /* Copy the exception vectors to the right places */
71 
    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
72 
    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
73 
    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
74 
 
1 jermar 75 
    /*
76 
     * Switch to BEV normal level so that exception vectors point to the kernel.
77 
     * Clear the error level.
78 
     */
79 
    cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit));
125 jermar 80 
 
329 palkovsky 81 
    /*
82 
     * Mask all interrupts
83 
     */
84 
    cp0_mask_all_int();
1 jermar 85 
    /*
86 
     * Unmask hardware clock interrupt.
87 
     */
509 jermar 88 
    cp0_unmask_int(TIMER_IRQ);
125 jermar 89 
 
1 jermar 90 
    /*
91 
     * Start hardware clock.
92 
     */
324 palkovsky 93 
    cp0_compare_write(cp0_compare_value + cp0_count_read());
94 
 
95 
    console_init();
614 palkovsky 96 
    debugger_init();
1037 decky 97 
 
98 
    /* Setup usermode */
99 
    init.cnt = 1;
100 
    init.tasks[0].addr = INIT_ADDRESS;
101 
    init.tasks[0].size = INIT_SIZE;
1 jermar 102 
}
23 jermar 103 
 
104 
void arch_post_mm_init(void)
105 
{
106 
}
32 jermar 107 
 
503 jermar 108 
void arch_pre_smp_init(void)
32 jermar 109 
{
110 
}
313 palkovsky 111 
 
503 jermar 112 
void arch_post_smp_init(void)
113 
{
114 
}
115 
 
794 palkovsky 116 
/* Stack pointer saved when entering user mode */
117 
/* TODO: How do we do it on SMP system???? */
118 
 
812 jermar 119 
/* Why the linker moves the variable 64K away in assembler
794 palkovsky 120 
 * when not in .text section ????????
121 
 */
122 
__address supervisor_sp __attribute__ ((section (".text")));
123 
 
1078 jermar 124 
void userspace(uspace_arg_t *kernel_uarg)
313 palkovsky 125 
{
126 
    /* EXL=1, UM=1, IE=1 */
127 
    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
128 
                          cp0_status_um_bit |
129 
                          cp0_status_ie_enabled_bit));
1078 jermar 130 
    cp0_epc_write((__address) kernel_uarg->uspace_entry);
131 
    userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE), (__address) kernel_uarg->uspace_uarg);
313 palkovsky 132 
    while (1)
133 
        ;
134 
}
135 
 
136 
void before_thread_runs_arch(void)
137 
{
138 
    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
139 
}
897 jermar 140 
 
141 
void after_thread_ran_arch(void)
142 
{
143 
}