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1018 decky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Martin Decky
3
 * Copyright (c) 2006 Jakub Jermar
1018 decky 4
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include "main.h" 
1764 jermar 31
#include <printf.h>
1018 decky 32
#include "asm.h"
1685 decky 33
#include "_components.h"
1894 jermar 34
#include <balloc.h>
1782 jermar 35
#include <ofw.h>
1894 jermar 36
#include <ofw_tree.h>
1837 jermar 37
#include "ofwarch.h"
1789 jermar 38
#include <align.h>
3408 jermar 39
#include <string.h>
1018 decky 40
 
1782 jermar 41
bootinfo_t bootinfo;
3672 jermar 42
 
1972 jermar 43
component_t components[COMPONENTS];
1782 jermar 44
 
1997 decky 45
char *release = RELEASE;
46
 
47
#ifdef REVISION
48
    char *revision = ", revision " REVISION;
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#else
50
    char *revision = "";
51
#endif
52
 
53
#ifdef TIMESTAMP
54
    char *timestamp = "\nBuilt on " TIMESTAMP;
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#else
56
    char *timestamp = "";
57
#endif
58
 
3672 jermar 59
/** UltraSPARC subarchitecture - 1 for US, 3 for US3 */
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uint8_t subarchitecture;
61
 
62
/**
63
 * mask of the MID field inside the ICBUS_CONFIG register shifted by
64
 * MID_SHIFT bits to the right
65
 */
66
uint16_t mid_mask;
67
 
1997 decky 68
/** Print version information. */
69
static void version_print(void)
70
{
3388 jermar 71
    printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
72
        "Copyright (c) 2006 HelenOS project\n",
73
        release, revision, timestamp);
1997 decky 74
}
75
 
3672 jermar 76
/* the lowest ID (read from the VER register) of some US3 CPU model */
77
#define FIRST_US3_CPU   0x14
78
 
79
/* the greatest ID (read from the VER register) of some US3 CPU model */
80
#define LAST_US3_CPU    0x19
81
 
82
/* UltraSPARC IIIi processor implementation code */
83
#define US_IIIi_CODE    0x15
84
 
85
/**
86
 * Sets the global variables "subarchitecture" and "mid_mask" to
87
 * correct values.
88
 */
89
static void detect_subarchitecture(void)
90
{
91
    uint64_t v;
92
    asm volatile ("rdpr %%ver, %0\n" : "=r" (v));
93
 
94
    v = (v << 16) >> 48;
95
    if ((v >= FIRST_US3_CPU) && (v <= LAST_US3_CPU)) {
96
        subarchitecture = SUBARCH_US3;
97
        if (v == US_IIIi_CODE)
98
            mid_mask = (1 << 5) - 1;
99
        else
100
            mid_mask = (1 << 10) - 1;
101
    } else if (v < FIRST_US3_CPU) {
102
        subarchitecture = SUBARCH_US;
103
        mid_mask = (1 << 5) - 1;
104
    } else {
105
        printf("\nThis CPU is not supported by HelenOS.");
106
    }
107
}
108
 
1018 decky 109
void bootstrap(void)
110
{
3399 jermar 111
    void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
112
    void *balloc_base;
113
    unsigned int top = 0;
114
    int i, j;
115
 
1997 decky 116
    version_print();
1972 jermar 117
 
3672 jermar 118
    detect_subarchitecture();
1685 decky 119
    init_components(components);
1782 jermar 120
 
1978 jermar 121
    if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
122
        printf("Error: unable to get start of physical memory.\n");
123
        halt();
124
    }
125
 
1789 jermar 126
    if (!ofw_memmap(&bootinfo.memmap)) {
127
        printf("Error: unable to get memory map, halting.\n");
128
        halt();
129
    }
3672 jermar 130
 
1789 jermar 131
    if (bootinfo.memmap.total == 0) {
132
        printf("Error: no memory detected, halting.\n");
133
        halt();
134
    }
3388 jermar 135
 
136
    /*
137
     * SILO for some reason adds 0x400000 and subtracts
138
     * bootinfo.physmem_start to/from silo_ramdisk_image.
139
     * We just need plain physical address so we fix it up.
140
     */
141
    if (silo_ramdisk_image) {
142
        silo_ramdisk_image += bootinfo.physmem_start;
143
        silo_ramdisk_image -= 0x400000;
3399 jermar 144
        /* Install 1:1 mapping for the ramdisk. */
145
        if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),
146
            (void *)((uintptr_t)silo_ramdisk_image),
147
            silo_ramdisk_size, -1) != 0) {
148
            printf("Failed to map ramdisk.\n");
149
            halt();
150
        }
3388 jermar 151
    }
1789 jermar 152
 
1899 jermar 153
    printf("\nSystem info\n");
1978 jermar 154
    printf(" memory: %dM starting at %P\n",
3388 jermar 155
        bootinfo.memmap.total >> 20, bootinfo.physmem_start);
1789 jermar 156
 
1685 decky 157
    printf("\nMemory statistics\n");
1789 jermar 158
    printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
159
    printf(" %P: boot info structure\n", &bootinfo);
1685 decky 160
 
3399 jermar 161
    /*
162
     * Figure out destination address for each component.
163
     * In this phase, we don't copy the components yet because we want to
164
     * to be careful not to overwrite anything, especially the components
165
     * which haven't been copied yet.
166
     */
167
    bootinfo.taskmap.count = 0;
168
    for (i = 0; i < COMPONENTS; i++) {
1978 jermar 169
        printf(" %P: %s image (size %d bytes)\n", components[i].start,
2250 jermar 170
            components[i].name, components[i].size);
3399 jermar 171
        top = ALIGN_UP(top, PAGE_SIZE);
172
        if (i > 0) {
173
            if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
174
                printf("Skipping superfluous components.\n");
175
                break;
176
            }
177
            bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
178
                base + top;
179
            bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
180
                components[i].size;
181
            bootinfo.taskmap.count++;
182
        }
183
        top += components[i].size;
184
    }
1782 jermar 185
 
3399 jermar 186
    j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
1894 jermar 187
 
3399 jermar 188
    if (silo_ramdisk_image) {
189
        /* Treat the ramdisk as the last bootinfo task. */
190
        if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
191
            printf("Skipping ramdisk.\n");
192
            goto skip_ramdisk;
193
        }
1685 decky 194
        top = ALIGN_UP(top, PAGE_SIZE);
3399 jermar 195
        bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
196
            base + top;
197
        bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
198
            silo_ramdisk_size;
199
        bootinfo.taskmap.count++;
200
        printf("\nCopying ramdisk...");
201
        /*
202
         * Claim and map the whole ramdisk as it may exceed the area
203
         * given to us by SILO.
204
         */
205
        (void) ofw_claim_phys(base + top, silo_ramdisk_size);
206
        (void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);
3408 jermar 207
        memmove(base + top, (void *)((uintptr_t)silo_ramdisk_image),
3399 jermar 208
            silo_ramdisk_size);
209
        printf("done.\n");
210
        top += silo_ramdisk_size;
211
    }
212
skip_ramdisk:
2250 jermar 213
 
3399 jermar 214
    /*
215
     * Now we can proceed to copy the components. We do it in reverse order
216
     * so that we don't overwrite anything even if the components overlap
217
     * with base.
218
     */
219
    printf("\nCopying bootinfo tasks\n");
220
    for (i = COMPONENTS - 1; i > 0; i--, j--) {
221
        printf(" %s...", components[i].name);
222
 
2250 jermar 223
        /*
224
         * At this point, we claim the physical memory that we are
225
         * going to use. We should be safe in case of the virtual
226
         * address space because the OpenFirmware, according to its
227
         * SPARC binding, should restrict its use of virtual memory
228
         * to addresses from [0xffd00000; 0xffefffff] and
229
         * [0xfe000000; 0xfeffffff].
3399 jermar 230
         *
231
         * XXX We don't map this piece of memory. We simply rely on
232
         *     SILO to have it done for us already in this case.
2250 jermar 233
         */
3399 jermar 234
        (void) ofw_claim_phys(bootinfo.physmem_start +
235
            bootinfo.taskmap.tasks[j].addr,
2250 jermar 236
            ALIGN_UP(components[i].size, PAGE_SIZE));
237
 
3399 jermar 238
        memcpy((void *)bootinfo.taskmap.tasks[j].addr,
239
            components[i].start, components[i].size);
1685 decky 240
        printf("done.\n");
1018 decky 241
    }
1782 jermar 242
 
3399 jermar 243
    printf("\nCopying kernel...");
244
    (void) ofw_claim_phys(bootinfo.physmem_start + base,
245
        ALIGN_UP(components[0].size, PAGE_SIZE));
246
    memcpy(base, components[0].start, components[0].size);
247
    printf("done.\n");
248
 
2250 jermar 249
    /*
3399 jermar 250
     * Claim and map the physical memory for the boot allocator.
2250 jermar 251
     * Initialize the boot allocator.
252
     */
3399 jermar 253
    balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
254
    (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
255
        BALLOC_MAX_SIZE);
256
    (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
257
    balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
1894 jermar 258
 
259
    printf("\nCanonizing OpenFirmware device tree...");
260
    bootinfo.ofw_root = ofw_tree_build();
261
    printf("done.\n");
262
 
1979 jermar 263
#ifdef CONFIG_SMP
1899 jermar 264
    printf("\nChecking for secondary processors...");
265
    if (!ofw_cpu())
1978 jermar 266
        printf("Error: unable to get CPU properties\n");
1899 jermar 267
    printf("done.\n");
1979 jermar 268
#endif
1899 jermar 269
 
1018 decky 270
    printf("\nBooting the kernel...\n");
1978 jermar 271
    jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
2250 jermar 272
        bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
273
        sizeof(bootinfo));
1018 decky 274
}
2250 jermar 275