source: mainline/boot/arch/sparc64/loader/main.c@ a9ddab2

/*
 * Copyright (c) 2005 Martin Decky
 * Copyright (c) 2006 Jakub Jermar 
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "main.h" 
#include <printf.h>
#include "asm.h"
#include "_components.h"
#include <balloc.h>
#include <ofw.h>
#include <ofw_tree.h>
#include "ofwarch.h"
#include <align.h>

bootinfo_t bootinfo;
component_t components[COMPONENTS];

char *release = RELEASE;

#ifdef REVISION
        char *revision = ", revision " REVISION;
#else
        char *revision = "";
#endif

#ifdef TIMESTAMP
        char *timestamp = "\nBuilt on " TIMESTAMP;
#else
        char *timestamp = "";
#endif

/** Print version information. */
static void version_print(void)
{
        printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
            "Copyright (c) 2006 HelenOS project\n",
            release, revision, timestamp);
}

void bootstrap(void)
{
        version_print();
        
        init_components(components);

        if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
                printf("Error: unable to get start of physical memory.\n");
                halt();
        }

        if (!ofw_memmap(&bootinfo.memmap)) {
                printf("Error: unable to get memory map, halting.\n");
                halt();
        }
        
        if (bootinfo.memmap.total == 0) {
                printf("Error: no memory detected, halting.\n");
                halt();
        }

        /*
         * SILO for some reason adds 0x400000 and subtracts
         * bootinfo.physmem_start to/from silo_ramdisk_image.
         * We just need plain physical address so we fix it up.
         */
        if (silo_ramdisk_image) {
                silo_ramdisk_image += bootinfo.physmem_start;
                silo_ramdisk_image -= 0x400000;
        }
        
        printf("\nSystem info\n");
        printf(" memory: %dM starting at %P\n",
            bootinfo.memmap.total >> 20, bootinfo.physmem_start);

        printf("\nMemory statistics\n");
        printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
        printf(" %P: boot info structure\n", &bootinfo);
        
        unsigned int i;
        for (i = 0; i < COMPONENTS; i++)
                printf(" %P: %s image (size %d bytes)\n", components[i].start,
                    components[i].name, components[i].size);

        void * base = (void *) KERNEL_VIRTUAL_ADDRESS;
        unsigned int top = 0;

        printf("\nCopying components\n");
        bootinfo.taskmap.count = 0;
        for (i = 0; i < COMPONENTS; i++) {
                printf(" %s...", components[i].name);
                top = ALIGN_UP(top, PAGE_SIZE);

                /*
                 * At this point, we claim the physical memory that we are
                 * going to use. We should be safe in case of the virtual
                 * address space because the OpenFirmware, according to its
                 * SPARC binding, should restrict its use of virtual memory
                 * to addresses from [0xffd00000; 0xffefffff] and
                 * [0xfe000000; 0xfeffffff].
                 */
                (void) ofw_claim_phys(bootinfo.physmem_start + base + top,
                    ALIGN_UP(components[i].size, PAGE_SIZE));
                    
                memcpy(base + top, components[i].start, components[i].size);
                if (i > 0) {
                        bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
                            base + top;
                        bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
                            components[i].size;
                        bootinfo.taskmap.count++;
                }
                top += components[i].size;
                printf("done.\n");
        }

        /*
         * Claim the physical memory for the boot allocator.
         * Initialize the boot allocator.
         */
        (void) ofw_claim_phys(bootinfo.physmem_start +
            base + ALIGN_UP(top, PAGE_SIZE), BALLOC_MAX_SIZE);
        balloc_init(&bootinfo.ballocs, ALIGN_UP(((uintptr_t) base) + top,
            PAGE_SIZE));

        printf("\nCanonizing OpenFirmware device tree...");
        bootinfo.ofw_root = ofw_tree_build();
        printf("done.\n");

#ifdef CONFIG_SMP
        printf("\nChecking for secondary processors...");
        if (!ofw_cpu())
                printf("Error: unable to get CPU properties\n");
        printf("done.\n");
#endif

        printf("\nBooting the kernel...\n");
        jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
            bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
            sizeof(bootinfo));
}