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885 decky 1
/*
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 * Copyright (C) 2005 Martin Decky
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 * 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 30
#include <printf.h>
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#include "asm.h"
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#include "_components.h"
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#define HEAP_GAP 1024000
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bootinfo_t bootinfo;
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static void check_align(const void *addr, const char *desc)
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{
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	if ((unsigned int) addr % PAGE_SIZE != 0) {
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		printf("Error: %s not on page boundary, halting.\n", desc);
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		halt();
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	}
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}
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static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top)
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{
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	if ((unsigned int) *pa + PAGE_SIZE < *top) {
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		printf("Warning: %s overlaps kernel physical area\n", desc);
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		void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top);
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		void *new_pa = (void *) (HEAP_GAP + *top);
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		*top += PAGE_SIZE;
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		if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) {
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			printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa);
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			halt();
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		}
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		if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) {
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			printf("Error: %s cannot be relocated, halting.\n", desc);
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			halt();	
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		}
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		printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa);
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		*pa = new_pa;
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		memcpy(new_va, va, PAGE_SIZE);
1068 decky 70
	}
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}
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885 decky 74
void bootstrap(void)
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{
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	printf("\nHelenOS PPC Bootloader\n");
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	init_components();
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1369 decky 80
	unsigned int i;
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	for (i = 0; i < COMPONENTS; i++)
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		check_align(components[i].start, components[i].name);
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	check_align(&real_mode, "bootstrap trampoline");
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	check_align(&trans, "translation table");
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1130 decky 88
	if (!ofw_memmap(&bootinfo.memmap)) {
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		printf("Error: unable to get memory map, halting.\n");
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		halt();
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	}
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1146 decky 93
	if (bootinfo.memmap.total == 0) {
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		printf("Error: no memory detected, halting.\n");
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		halt();
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	}
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1130 decky 98
	if (!ofw_screen(&bootinfo.screen)) {
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		printf("Error: unable to get screen properties, halting.\n");
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		halt();
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	}
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	if (!ofw_keyboard(&bootinfo.keyboard)) {
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		printf("Error: unable to get keyboard properties, halting.\n");
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		halt();
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	}
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	printf("\nDevice statistics\n");
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	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);
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	printf(" keyboard at %L (size %d bytes)\n", bootinfo.keyboard.addr, bootinfo.keyboard.size);
1130 decky 111
 
1058 decky 112
	void *real_mode_pa = ofw_translate(&real_mode);
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	void *trans_pa = ofw_translate(&trans);
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	void *bootinfo_pa = ofw_translate(&bootinfo);
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1130 decky 116
	printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20);
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	printf(" %L: boot info structure (physical %L)\n", &bootinfo, bootinfo_pa);
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	printf(" %L: bootstrap trampoline (physical %L)\n", &real_mode, real_mode_pa);
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	printf(" %L: translation table (physical %L)\n", &trans, trans_pa);
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	for (i = 0; i < COMPONENTS; i++)
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		printf(" %L: %s image (size %d bytes)\n", components[i].start, components[i].name, components[i].size);
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1369 decky 123
	unsigned int top = 0;
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	for (i = 0; i < COMPONENTS; i++)
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		top += ALIGN_UP(components[i].size, PAGE_SIZE);
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	unsigned int pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH;
1219 decky 128
 
1369 decky 129
	for (i = 0; i < pages; i++) {
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		void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH));
1369 decky 131
		fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "kernel", &top);
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		trans[i] = pa;
885 decky 133
	}
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1369 decky 135
	bootinfo.taskmap.count = 0;
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	for (i = 1; i < COMPONENTS; i++) {
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		unsigned int component_pages = ALIGN_UP(components[i].size, PAGE_SIZE) >> PAGE_WIDTH;
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		unsigned int j;
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140
		for (j = 0; j < component_pages; j++) {
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			void *pa = ofw_translate(components[i].start + (j << PAGE_WIDTH));
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			fix_overlap(components[i].start + (j << PAGE_WIDTH), &pa, components[i].name, &top);
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			trans[pages + j] = pa;
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			if (j == 0) {
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				bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = (void *) (pages << PAGE_WIDTH);
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				bootinfo.taskmap.tasks[bootinfo.taskmap.count].size = components[i].size;
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				bootinfo.taskmap.count++;
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			}
1219 decky 149
		}
1369 decky 150
 
151
		pages += component_pages;
1219 decky 152
	}
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1369 decky 154
	fix_overlap(&real_mode, &real_mode_pa, "bootstrap trampoline", &top);
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	fix_overlap(&trans, &trans_pa, "translation table", &top);
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	fix_overlap(&bootinfo, &bootinfo_pa, "boot info", &top);
1075 decky 157
 
1130 decky 158
	printf("\nBooting the kernel...\n");
1783 jermar 159
	jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, pages << PAGE_WIDTH, real_mode_pa, (void *) bootinfo.screen.addr, bootinfo.screen.scanline);
885 decky 160
}