Subversion Repositories HelenOS-historic

Rev

Rev 1372 | Rev 1620 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
885 decky 1
/*
2
 * Copyright (C) 2005 Martin Decky
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
#include "main.h" 
30
#include "printf.h"
913 decky 31
#include "asm.h"
1369 decky 32
#include "_components.h"
885 decky 33
 
1075 decky 34
#define HEAP_GAP 1024000
35
 
1130 decky 36
bootinfo_t bootinfo;
1058 decky 37
 
1130 decky 38
 
1058 decky 39
static void check_align(const void *addr, const char *desc)
40
{
41
    if ((unsigned int) addr % PAGE_SIZE != 0) {
1146 decky 42
        printf("Error: %s not on page boundary, halting.\n", desc);
1058 decky 43
        halt();
44
    }
45
}
46
 
47
 
1075 decky 48
static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top)
1068 decky 49
{
1075 decky 50
    if ((unsigned int) *pa + PAGE_SIZE < *top) {
51
        printf("Warning: %s overlaps kernel physical area\n", desc);
52
 
53
        void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top);
54
        void *new_pa = (void *) (HEAP_GAP + *top);
55
        *top += PAGE_SIZE;
56
 
57
        if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) {
1146 decky 58
            printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa);
1075 decky 59
            halt();
60
        }
61
 
62
        if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) {
1146 decky 63
            printf("Error: %s cannot be relocated, halting.\n", desc);
1075 decky 64
            halt();
65
        }
66
 
67
        printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa);
68
        *pa = new_pa;
69
        memcpy(new_va, va, PAGE_SIZE);
1068 decky 70
    }
71
}
72
 
73
 
885 decky 74
void bootstrap(void)
75
{
953 decky 76
    printf("\nHelenOS PPC Bootloader\n");
885 decky 77
 
1369 decky 78
    init_components();
953 decky 79
 
1369 decky 80
    unsigned int i;
81
 
82
    for (i = 0; i < COMPONENTS; i++)
83
        check_align(components[i].start, components[i].name);
84
 
85
    check_align(&real_mode, "bootstrap trampoline");
86
    check_align(&trans, "translation table");
87
 
1130 decky 88
    if (!ofw_memmap(&bootinfo.memmap)) {
1369 decky 89
        printf("Error: unable to get memory map, halting.\n");
1068 decky 90
        halt();
91
    }
92
 
1146 decky 93
    if (bootinfo.memmap.total == 0) {
1369 decky 94
        printf("Error: no memory detected, halting.\n");
1146 decky 95
        halt();
96
    }
97
 
1130 decky 98
    if (!ofw_screen(&bootinfo.screen)) {
1369 decky 99
        printf("Error: unable to get screen properties, halting.\n");
1130 decky 100
        halt();
101
    }
102
 
103
    printf("\nDevice statistics\n");
104
    printf(" screen at %L, resolution %dx%d, %d bpp (scanline %d bytes)\n", bootinfo.screen.addr, bootinfo.screen.width, bootinfo.screen.height, bootinfo.screen.bpp, bootinfo.screen.scanline);
105
 
1058 decky 106
    void *real_mode_pa = ofw_translate(&real_mode);
107
    void *trans_pa = ofw_translate(&trans);
1130 decky 108
    void *bootinfo_pa = ofw_translate(&bootinfo);
1058 decky 109
 
1130 decky 110
    printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20);
1369 decky 111
    printf(" %L: boot info structure (physical %L)\n", &bootinfo, bootinfo_pa);
112
    printf(" %L: bootstrap trampoline (physical %L)\n", &real_mode, real_mode_pa);
113
    printf(" %L: translation table (physical %L)\n", &trans, trans_pa);
114
    for (i = 0; i < COMPONENTS; i++)
115
        printf(" %L: %s image (size %d bytes)\n", components[i].start, components[i].name, components[i].size);
1058 decky 116
 
1369 decky 117
    unsigned int top = 0;
118
    for (i = 0; i < COMPONENTS; i++)
119
        top += ALIGN_UP(components[i].size, PAGE_SIZE);
1219 decky 120
 
1369 decky 121
    unsigned int pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH;
1219 decky 122
 
1369 decky 123
    for (i = 0; i < pages; i++) {
1219 decky 124
        void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH));
1369 decky 125
        fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "kernel", &top);
1219 decky 126
        trans[i] = pa;
885 decky 127
    }
128
 
1369 decky 129
    bootinfo.taskmap.count = 0;
130
    for (i = 1; i < COMPONENTS; i++) {
131
        unsigned int component_pages = ALIGN_UP(components[i].size, PAGE_SIZE) >> PAGE_WIDTH;
132
        unsigned int j;
133
 
134
        for (j = 0; j < component_pages; j++) {
135
            void *pa = ofw_translate(components[i].start + (j << PAGE_WIDTH));
136
            fix_overlap(components[i].start + (j << PAGE_WIDTH), &pa, components[i].name, &top);
137
            trans[pages + j] = pa;
138
            if (j == 0) {
139
                bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = (void *) (pages << PAGE_WIDTH);
140
                bootinfo.taskmap.tasks[bootinfo.taskmap.count].size = components[i].size;
141
                bootinfo.taskmap.count++;
142
            }
1219 decky 143
        }
1369 decky 144
 
145
        pages += component_pages;
1219 decky 146
    }
147
 
1369 decky 148
    fix_overlap(&real_mode, &real_mode_pa, "bootstrap trampoline", &top);
149
    fix_overlap(&trans, &trans_pa, "translation table", &top);
150
    fix_overlap(&bootinfo, &bootinfo_pa, "boot info", &top);
1075 decky 151
 
1130 decky 152
    printf("\nBooting the kernel...\n");
1478 decky 153
    jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, pages << PAGE_WIDTH, real_mode_pa, bootinfo.screen.addr, bootinfo.screen.scanline);
885 decky 154
}