Subversion Repositories HelenOS-historic

Rev

Rev 573 | Rev 590 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 573 Rev 575
1
/*
1
/*
2
 * Copyright (C) 2003-2004 Jakub Jermar
2
 * Copyright (C) 2003-2004 Jakub Jermar
3
 * All rights reserved.
3
 * All rights reserved.
4
 *
4
 *
5
 * Redistribution and use in source and binary forms, with or without
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
6
 * modification, are permitted provided that the following conditions
7
 * are met:
7
 * are met:
8
 *
8
 *
9
 * - Redistributions of source code must retain the above copyright
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
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
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.
15
 *   derived from this software without specific prior written permission.
16
 *
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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
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.
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
27
 */
28
 
28
 
-
 
29
 
29
#include <arch.h>
30
#include <arch.h>
30
#include <arch/cp0.h>
31
#include <arch/cp0.h>
31
#include <arch/exception.h>
32
#include <arch/exception.h>
32
#include <arch/asm/regname.h>
-
 
33
#include <arch/asm.h>
33
#include <arch/asm.h>
34
#include <mm/vm.h>
34
#include <mm/vm.h>
-
 
35
 
35
#include <userspace.h>
36
#include <userspace.h>
36
#include <arch/console.h>
37
#include <arch/console.h>
37
#include <memstr.h>
38
#include <memstr.h>
38
#include <arch/interrupt.h>
-
 
39
#include <arch/drivers/arc.h>
-
 
40
#include <arch/drivers/keyboard.h>
-
 
41
#include <proc/thread.h>
39
#include <proc/thread.h>
42
#include <print.h>
40
#include <print.h>
43
 
41
 
-
 
42
#include <arch/interrupt.h>
-
 
43
#include <arch/drivers/arc.h>
-
 
44
#include <console/chardev.h>
-
 
45
 
-
 
46
#include <arch/asm/regname.h>
-
 
47
 
44
/* Size of the code jumping to the exception handler code
48
/* Size of the code jumping to the exception handler code
45
 * - J+NOP
49
 * - J+NOP
46
 */
50
 */
47
#define EXCEPTION_JUMP_SIZE    8
51
#define EXCEPTION_JUMP_SIZE    8
48
 
52
 
49
#define TLB_EXC ((char *) 0x80000000)
53
#define TLB_EXC ((char *) 0x80000000)
50
#define NORM_EXC ((char *) 0x80000180)
54
#define NORM_EXC ((char *) 0x80000180)
51
#define CACHE_EXC ((char *) 0x80000100)
55
#define CACHE_EXC ((char *) 0x80000100)
52
 
56
 
53
void arch_pre_mm_init(void)
57
void arch_pre_mm_init(void)
54
{
58
{
55
    /* It is not assumed by default */
59
    /* It is not assumed by default */
56
    interrupts_disable();
60
    interrupts_disable();
-
 
61
   
-
 
62
    /* Initialize dispatch table */
-
 
63
    interrupt_init();
57
 
64
 
58
    arc_init();
65
    arc_init();
59
 
66
 
60
    /* Copy the exception vectors to the right places */
67
    /* Copy the exception vectors to the right places */
61
    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
68
    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
62
    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
69
    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
63
    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
70
    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
64
 
71
 
65
    /*
72
    /*
66
     * Switch to BEV normal level so that exception vectors point to the kernel.
73
     * Switch to BEV normal level so that exception vectors point to the kernel.
67
     * Clear the error level.
74
     * Clear the error level.
68
     */
75
     */
69
    cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit));
76
    cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit));
70
 
77
 
71
    /*
78
    /*
72
     * Mask all interrupts
79
     * Mask all interrupts
73
     */
80
     */
74
    cp0_mask_all_int();
81
    cp0_mask_all_int();
75
    /*
82
    /*
76
     * Unmask hardware clock interrupt.
83
     * Unmask hardware clock interrupt.
77
     */
84
     */
78
    cp0_unmask_int(TIMER_IRQ);
85
    cp0_unmask_int(TIMER_IRQ);
79
 
86
 
80
    /*
87
    /*
81
     * Start hardware clock.
88
     * Start hardware clock.
82
     */
89
     */
83
    cp0_compare_write(cp0_compare_value + cp0_count_read());
90
    cp0_compare_write(cp0_compare_value + cp0_count_read());
84
 
91
 
85
    console_init();
92
    console_init();
86
    keyboard_init();
-
 
87
    arc_print_memory_map();
93
    arc_print_memory_map();
88
    arc_print_devices();
94
    arc_print_devices();
89
}
95
}
90
 
96
 
91
void arch_post_mm_init(void)
97
void arch_post_mm_init(void)
92
{
98
{
93
}
99
}
94
 
100
 
95
void arch_pre_smp_init(void)
101
void arch_pre_smp_init(void)
96
{
102
{
97
}
103
}
98
 
104
 
99
void arch_post_smp_init(void)
105
void arch_post_smp_init(void)
100
{
106
{
101
}
107
}
102
 
108
 
103
void userspace(void)
109
void userspace(void)
104
{
110
{
105
    /* EXL=1, UM=1, IE=1 */
111
    /* EXL=1, UM=1, IE=1 */
106
    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
112
    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
107
                          cp0_status_um_bit |
113
                          cp0_status_um_bit |
108
                          cp0_status_ie_enabled_bit));
114
                          cp0_status_ie_enabled_bit));
109
   
115
   
110
    cp0_epc_write(UTEXT_ADDRESS);
116
    cp0_epc_write(UTEXT_ADDRESS);
111
    userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
117
    userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
112
    while (1)
118
    while (1)
113
        ;
119
        ;
114
}
120
}
115
 
121
 
116
/* Stack pointer saved when entering user mode */
122
/* Stack pointer saved when entering user mode */
117
/* TODO: How do we do it on SMP system???? */
123
/* TODO: How do we do it on SMP system???? */
118
__address supervisor_sp;
124
__address supervisor_sp;
119
 
125
 
120
void before_thread_runs_arch(void)
126
void before_thread_runs_arch(void)
121
{
127
{
122
    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
128
    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
123
}
129
}
124
 
130