Subversion Repositories HelenOS

Rev

Rev 1474 | Rev 1642 | 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>
1112 palkovsky 42
#include <syscall/syscall.h>
330 palkovsky 43
 
575 palkovsky 44
#include <arch/interrupt.h>
45
#include <arch/drivers/arc.h>
46
#include <console/chardev.h>
614 palkovsky 47
#include <arch/debugger.h>
1396 palkovsky 48
#include <genarch/fb/fb.h>
575 palkovsky 49
 
50
#include <arch/asm/regname.h>
51
 
326 palkovsky 52
/* Size of the code jumping to the exception handler code
53
 * - J+NOP
54
 */
55
#define EXCEPTION_JUMP_SIZE    8
56
 
57
#define TLB_EXC ((char *) 0x80000000)
58
#define NORM_EXC ((char *) 0x80000180)
59
#define CACHE_EXC ((char *) 0x80000100)
60
 
1222 decky 61
void arch_pre_main(void)
62
{
63
    /* Setup usermode */
1537 palkovsky 64
    init.cnt = 6;
1222 decky 65
    init.tasks[0].addr = INIT_ADDRESS;
66
    init.tasks[0].size = INIT_SIZE;
1332 palkovsky 67
    init.tasks[1].addr = INIT_ADDRESS + 0x100000;
68
    init.tasks[1].size = INIT_SIZE;
69
    init.tasks[2].addr = INIT_ADDRESS + 0x200000;
70
    init.tasks[2].size = INIT_SIZE;
1432 jermar 71
    init.tasks[3].addr = INIT_ADDRESS + 0x300000;
72
    init.tasks[3].size = INIT_SIZE;
1458 palkovsky 73
    init.tasks[4].addr = INIT_ADDRESS + 0x400000;
74
    init.tasks[4].size = INIT_SIZE;
1537 palkovsky 75
    init.tasks[5].addr = INIT_ADDRESS + 0x500000;
76
    init.tasks[5].size = INIT_SIZE;
1222 decky 77
}
78
 
26 jermar 79
void arch_pre_mm_init(void)
1 jermar 80
{
329 palkovsky 81
    /* It is not assumed by default */
413 jermar 82
    interrupts_disable();
575 palkovsky 83
 
84
    /* Initialize dispatch table */
590 palkovsky 85
    exception_init();
573 palkovsky 86
    arc_init();
332 palkovsky 87
 
326 palkovsky 88
    /* Copy the exception vectors to the right places */
89
    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
90
    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
91
    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
92
 
1434 palkovsky 93
    interrupt_init();
1 jermar 94
    /*
95
     * Switch to BEV normal level so that exception vectors point to the kernel.
96
     * Clear the error level.
97
     */
98
    cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit));
125 jermar 99
 
329 palkovsky 100
    /*
101
     * Mask all interrupts
102
     */
103
    cp0_mask_all_int();
1434 palkovsky 104
 
1 jermar 105
    /*
106
     * Unmask hardware clock interrupt.
107
     */
509 jermar 108
    cp0_unmask_int(TIMER_IRQ);
125 jermar 109
 
324 palkovsky 110
    console_init();
614 palkovsky 111
    debugger_init();
1 jermar 112
}
23 jermar 113
 
114
void arch_post_mm_init(void)
115
{
1396 palkovsky 116
#ifdef CONFIG_FB
117
        fb_init(0x12000000, 640, 480, 24, 1920); // gxemul framebuffer
118
#endif
23 jermar 119
}
32 jermar 120
 
503 jermar 121
void arch_pre_smp_init(void)
32 jermar 122
{
123
}
313 palkovsky 124
 
503 jermar 125
void arch_post_smp_init(void)
126
{
127
}
128
 
794 palkovsky 129
/* Stack pointer saved when entering user mode */
130
/* TODO: How do we do it on SMP system???? */
131
 
812 jermar 132
/* Why the linker moves the variable 64K away in assembler
794 palkovsky 133
 * when not in .text section ????????
134
 */
135
__address supervisor_sp __attribute__ ((section (".text")));
136
 
1078 jermar 137
void userspace(uspace_arg_t *kernel_uarg)
313 palkovsky 138
{
139
    /* EXL=1, UM=1, IE=1 */
140
    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
141
                          cp0_status_um_bit |
142
                          cp0_status_ie_enabled_bit));
1078 jermar 143
    cp0_epc_write((__address) kernel_uarg->uspace_entry);
1122 palkovsky 144
    userspace_asm(((__address) kernel_uarg->uspace_stack+PAGE_SIZE),
145
              (__address) kernel_uarg->uspace_uarg,
146
              (__address) kernel_uarg->uspace_entry);
313 palkovsky 147
    while (1)
148
        ;
149
}
150
 
1187 jermar 151
/** Perform mips32 specific tasks needed before the new task is run. */
152
void before_task_runs_arch(void)
153
{
154
}
155
 
156
/** Perform mips32 specific tasks needed before the new thread is scheduled. */
313 palkovsky 157
void before_thread_runs_arch(void)
158
{
159
    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
160
}
897 jermar 161
 
162
void after_thread_ran_arch(void)
163
{
164
}
1112 palkovsky 165
 
1121 jermar 166
/** Set thread-local-storage pointer
1112 palkovsky 167
 *
168
 * We have it currently in K1, it is
169
 * possible to have it separately in the future.
170
 */
171
__native sys_tls_set(__native addr)
172
{
173
    return 0;
174
}
1474 palkovsky 175