Subversion Repositories HelenOS

/*

 * 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>

#include <string.h>

bootinfo_t bootinfo;

/** UltraSPARC subarchitecture - 1 for US, 3 for US3 */

uint8_t subarchitecture;

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);

}

/* the lowest ID (read from the VER register) of some US3 CPU model */

#define FIRST_US3_CPU 0x14

/* the greatest ID (read from the VER register) of some US3 CPU model */

#define LAST_US3_CPU 0x19

/**

 * Sets the global variable "subarchitecture" to the correct value.

 */

static void detect_subarchitecture(void)

{

	uint64_t v;

	asm volatile ("rdpr %%ver, %0\n" : "=r" (v));

	v = (v << 16) >> 48;

	if ((v >= FIRST_US3_CPU) && (v <= LAST_US3_CPU)) {

		subarchitecture = SUBARCH_US3;

	} else if (v < FIRST_US3_CPU) {

		subarchitecture = SUBARCH_US;

	}

}

void bootstrap(void)

{

	void *base = (void *) KERNEL_VIRTUAL_ADDRESS;

	void *balloc_base;

	unsigned int top = 0;

	int i, j;

	version_print();

	detect_subarchitecture();

	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;

		/* Install 1:1 mapping for the ramdisk. */

		if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),

		    (void *)((uintptr_t)silo_ramdisk_image),

		    silo_ramdisk_size, -1) != 0) {

			printf("Failed to map ramdisk.\n");

			halt();

		}

	}

	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);

	/*

	 * Figure out destination address for each component.

	 * In this phase, we don't copy the components yet because we want to

	 * to be careful not to overwrite anything, especially the components

	 * which haven't been copied yet.

	 */

	bootinfo.taskmap.count = 0;

	for (i = 0; i < COMPONENTS; i++) {

		printf(" %P: %s image (size %d bytes)\n", components[i].start,

		    components[i].name, components[i].size);

		top = ALIGN_UP(top, PAGE_SIZE);

		if (i > 0) {

			if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {

				printf("Skipping superfluous components.\n");

				break;

			}

			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;

	}

	j = bootinfo.taskmap.count - 1;	/* do not consider ramdisk */

	if (silo_ramdisk_image) {

		/* Treat the ramdisk as the last bootinfo task. */

		if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {

			printf("Skipping ramdisk.\n");

			goto skip_ramdisk;

		}

		top = ALIGN_UP(top, PAGE_SIZE);

		bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = 

		    base + top;

		bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =

		    silo_ramdisk_size;

		bootinfo.taskmap.count++;

		printf("\nCopying ramdisk...");

		/*

		 * Claim and map the whole ramdisk as it may exceed the area

		 * given to us by SILO.

		 */

		(void) ofw_claim_phys(base + top, silo_ramdisk_size);

		(void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);

		memmove(base + top, (void *)((uintptr_t)silo_ramdisk_image),

		    silo_ramdisk_size);

		printf("done.\n");

		top += silo_ramdisk_size;

	}

skip_ramdisk:

	/*

	 * Now we can proceed to copy the components. We do it in reverse order

	 * so that we don't overwrite anything even if the components overlap

	 * with base.

	 */

	printf("\nCopying bootinfo tasks\n");

	for (i = COMPONENTS - 1; i > 0; i--, j--) {

		printf(" %s...", components[i].name);

		/*

		 * 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].

		 *

		 * XXX We don't map this piece of memory. We simply rely on

		 *     SILO to have it done for us already in this case.

		 */

		(void) ofw_claim_phys(bootinfo.physmem_start +

		    bootinfo.taskmap.tasks[j].addr,

		    ALIGN_UP(components[i].size, PAGE_SIZE));

		memcpy((void *)bootinfo.taskmap.tasks[j].addr,

		    components[i].start, components[i].size);

		printf("done.\n");

	}

	printf("\nCopying kernel...");

	(void) ofw_claim_phys(bootinfo.physmem_start + base,

	    ALIGN_UP(components[0].size, PAGE_SIZE));

	memcpy(base, components[0].start, components[0].size);

	printf("done.\n");

	/*

	 * Claim and map the physical memory for the boot allocator.

	 * Initialize the boot allocator.

	 */

	balloc_base = base + ALIGN_UP(top, PAGE_SIZE);

	(void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,

	    BALLOC_MAX_SIZE);

	(void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);

	balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);

	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));

}