WebSVN – HelenOS-historic – Diff – /boot/trunk/arch/ppc32/loader/main.c


/*
 * Copyright (C) 2005 Martin Decky
 * 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"
 
#define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start)
#define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end)
#define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)
 
#define HEAP_GAP 1024000
 
 
 
 
 
 
bootinfo_t bootinfo;
 
 
static void check_align(const void *addr, const char *desc)
{
    if ((unsigned int) addr % PAGE_SIZE != 0) {
        printf("Error: %s not on page boundary\n", desc);
        halt();
    }
}
 
 
static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top)
{
    if ((unsigned int) *pa + PAGE_SIZE < *top) {
        printf("Warning: %s overlaps kernel physical area\n", desc);
       
        void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top);
        void *new_pa = (void *) (HEAP_GAP + *top);
        *top += PAGE_SIZE;
       
        if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) {
            printf("Error: Unable to map page aligned memory at %L (physical %L)\n", new_va, new_pa);
            halt();
        }
       
        if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) {
            printf("Error: %s cannot be relocated\n", desc);
            halt();
        }
       
        printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa);
        *pa = new_pa;
        memcpy(new_va, va, PAGE_SIZE);
    }
}
 
 
void bootstrap(void)
{
    printf("\nHelenOS PPC Bootloader\n");
   
    check_align(KERNEL_START, "Kernel image");
    check_align(&real_mode, "Bootstrap trampoline");
    check_align(&trans, "Translation table");
   
    if (!ofw_memmap(&bootinfo.memmap)) {
        printf("Error: Unable to get memory map\n");
        halt();
    }
   
    if (!ofw_screen(&bootinfo.screen)) {
        printf("Error: Unable to get screen properties\n");
        halt();
    }
   
    printf("\nDevice statistics\n");
    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);
   
    void *real_mode_pa = ofw_translate(&real_mode);
    void *trans_pa = ofw_translate(&trans);
    void *bootinfo_pa = ofw_translate(&bootinfo);
   
    printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20);
    printf(" kernel image         at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE);
    printf(" boot info            at %L (physical %L)\n", &bootinfo, bootinfo_pa);
    printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa);
    printf(" translation table    at %L (physical %L)\n", &trans, trans_pa);
   
    unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE);
    unsigned int addr;
    for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) {
        void *pa = ofw_translate(KERNEL_START + addr);
        fix_overlap(KERNEL_START + addr, &pa, "Kernel image", &top);
        trans[addr >> PAGE_WIDTH] = pa;
    }
   
    fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top);
    fix_overlap(&trans, &trans_pa, "Translation table", &top);
    fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top);
   
    printf("\nBooting the kernel...\n");
    jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, KERNEL_SIZE, real_mode_pa);
}
 

Subversion Repositories HelenOS-historic

(root)/boot/trunk/arch/ppc32/loader/main.c – Rev 1130 → 1131

Rev 1130		Rev 1131
1	/*	1	/*
2	* Copyright (C) 2005 Martin Decky	2	* Copyright (C) 2005 Martin Decky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include "main.h"	29	#include "main.h"
30	#include "printf.h"	30	#include "printf.h"
31	#include "asm.h"	31	#include "asm.h"
32		32
33	#define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start)	33	#define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start)
34	#define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end)	34	#define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end)
35	#define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)	35	#define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)
36		36
37	#define HEAP_GAP 1024000	37	#define HEAP_GAP 1024000
38		38
39	typedef struct {	-
40	memmap_t memmap;	-
41	screen_t screen;	-
42	} bootinfo_t;	-
43		-
44	bootinfo_t bootinfo;	39	bootinfo_t bootinfo;
45		40
46		41
47	static void check_align(const void addr, const char desc)	42	static void check_align(const void addr, const char desc)
48	{	43	{
49	if ((unsigned int) addr % PAGE_SIZE != 0) {	44	if ((unsigned int) addr % PAGE_SIZE != 0) {
50	printf("Error: %s not on page boundary\n", desc);	45	printf("Error: %s not on page boundary\n", desc);
51	halt();	46	halt();
52	}	47	}
53	}	48	}
54		49
55		50
56	static void fix_overlap(void va, void pa, const char desc, unsigned int *top)	51	static void fix_overlap(void va, void pa, const char desc, unsigned int *top)
57	{	52	{
58	if ((unsigned int) pa + PAGE_SIZE < top) {	53	if ((unsigned int) pa + PAGE_SIZE < top) {
59	printf("Warning: %s overlaps kernel physical area\n", desc);	54	printf("Warning: %s overlaps kernel physical area\n", desc);
60		55
61	void new_va = (void ) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top);	56	void new_va = (void ) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top);
62	void new_pa = (void ) (HEAP_GAP + *top);	57	void new_pa = (void ) (HEAP_GAP + *top);
63	*top += PAGE_SIZE;	58	*top += PAGE_SIZE;
64		59
65	if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) {	60	if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) {
66	printf("Error: Unable to map page aligned memory at %L (physical %L)\n", new_va, new_pa);	61	printf("Error: Unable to map page aligned memory at %L (physical %L)\n", new_va, new_pa);
67	halt();	62	halt();
68	}	63	}
69		64
70	if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) {	65	if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) {
71	printf("Error: %s cannot be relocated\n", desc);	66	printf("Error: %s cannot be relocated\n", desc);
72	halt();	67	halt();
73	}	68	}
74		69
75	printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa);	70	printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa);
76	*pa = new_pa;	71	*pa = new_pa;
77	memcpy(new_va, va, PAGE_SIZE);	72	memcpy(new_va, va, PAGE_SIZE);
78	}	73	}
79	}	74	}
80		75
81		76
82	void bootstrap(void)	77	void bootstrap(void)
83	{	78	{
84	printf("\nHelenOS PPC Bootloader\n");	79	printf("\nHelenOS PPC Bootloader\n");
85		80
86	check_align(KERNEL_START, "Kernel image");	81	check_align(KERNEL_START, "Kernel image");
87	check_align(&real_mode, "Bootstrap trampoline");	82	check_align(&real_mode, "Bootstrap trampoline");
88	check_align(&trans, "Translation table");	83	check_align(&trans, "Translation table");
89		84
90	if (!ofw_memmap(&bootinfo.memmap)) {	85	if (!ofw_memmap(&bootinfo.memmap)) {
91	printf("Error: Unable to get memory map\n");	86	printf("Error: Unable to get memory map\n");
92	halt();	87	halt();
93	}	88	}
94		89
95	if (!ofw_screen(&bootinfo.screen)) {	90	if (!ofw_screen(&bootinfo.screen)) {
96	printf("Error: Unable to get screen properties\n");	91	printf("Error: Unable to get screen properties\n");
97	halt();	92	halt();
98	}	93	}
99		94
100	printf("\nDevice statistics\n");	95	printf("\nDevice statistics\n");
101	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);	96	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);
102		97
103	void *real_mode_pa = ofw_translate(&real_mode);	98	void *real_mode_pa = ofw_translate(&real_mode);
104	void *trans_pa = ofw_translate(&trans);	99	void *trans_pa = ofw_translate(&trans);
105	void *bootinfo_pa = ofw_translate(&bootinfo);	100	void *bootinfo_pa = ofw_translate(&bootinfo);
106		101
107	printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20);	102	printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20);
108	printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE);	103	printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE);
109	printf(" boot info at %L (physical %L)\n", &bootinfo, bootinfo_pa);	104	printf(" boot info at %L (physical %L)\n", &bootinfo, bootinfo_pa);
110	printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa);	105	printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa);
111	printf(" translation table at %L (physical %L)\n", &trans, trans_pa);	106	printf(" translation table at %L (physical %L)\n", &trans, trans_pa);
112		107
113	unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE);	108	unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE);
114	unsigned int addr;	109	unsigned int addr;
115	for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) {	110	for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) {
116	void *pa = ofw_translate(KERNEL_START + addr);	111	void *pa = ofw_translate(KERNEL_START + addr);
117	fix_overlap(KERNEL_START + addr, &pa, "Kernel image", &top);	112	fix_overlap(KERNEL_START + addr, &pa, "Kernel image", &top);
118	trans[addr >> PAGE_WIDTH] = pa;	113	trans[addr >> PAGE_WIDTH] = pa;
119	}	114	}
120		115
121	fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top);	116	fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top);
122	fix_overlap(&trans, &trans_pa, "Translation table", &top);	117	fix_overlap(&trans, &trans_pa, "Translation table", &top);
123	fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top);	118	fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top);
124		119
125	printf("\nBooting the kernel...\n");	120	printf("\nBooting the kernel...\n");
126	jump_to_kernel(bootinfo_pa, trans_pa, KERNEL_SIZE, real_mode_pa);	121	jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, KERNEL_SIZE, real_mode_pa);
127	}	122	}
128		123