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prekern.h revision 1.6 
      1 /*	$NetBSD: prekern.h,v 1.6 2017/11/09 15:56:56 maxv Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2017 The NetBSD Foundation, Inc. All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Maxime Villard.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 #include <sys/param.h>
     33 #include <sys/stdbool.h>
     34 #include <machine/pte.h>
     35 
     36 #include "pdir.h"
     37 #include "redef.h"
     38 
     39 #define MM_PROT_READ	0x00
     40 #define MM_PROT_WRITE	0x01
     41 #define MM_PROT_EXECUTE	0x02
     42 
     43 #define ASSERT(a) if (!(a)) fatal("ASSERT");
     44 #define memcpy(d, v, l) __builtin_memcpy(d, v, l)
     45 typedef uint64_t paddr_t;
     46 typedef uint64_t vaddr_t;
     47 typedef uint64_t pt_entry_t;
     48 typedef uint64_t pd_entry_t;
     49 typedef uint64_t pte_prot_t;
     50 #define WHITE_ON_BLACK 0x07
     51 #define RED_ON_BLACK 0x04
     52 #define GREEN_ON_BLACK 0x02
     53 
     54 #define HEAD_WINDOW_BASE	(KERNBASE - NBPD_L3)
     55 #define HEAD_WINDOW_SIZE	NBPD_L3
     56 
     57 #define KASLR_WINDOW_BASE	KERNBASE		/* max - 2GB */
     58 #define KASLR_WINDOW_SIZE	(2LLU * (1 << 30))	/* 2GB */
     59 
     60 /* -------------------------------------------------------------------------- */
     61 
     62 static inline void
     63 memset(void *dst, char c, size_t sz)
     64 {
     65 	char *bdst = dst;
     66 	while (sz > 0) {
     67 		*bdst = c;
     68 		bdst++, sz--;
     69 	}
     70 }
     71 
     72 static inline int
     73 memcmp(const char *a, const char *b, size_t c)
     74 {
     75 	size_t i;
     76 	for (i = 0; i < c; i++) {
     77 		if (a[i] != b[i])
     78 			return 1;
     79 	}
     80 	return 0;
     81 }
     82 
     83 static inline int
     84 strcmp(char *a, char *b)
     85 {
     86 	size_t i;
     87 	for (i = 0; a[i] != '\0'; i++) {
     88 		if (a[i] != b[i])
     89 			return 1;
     90 	}
     91 	return 0;
     92 }
     93 
     94 /* -------------------------------------------------------------------------- */
     95 
     96 struct bootspace {
     97 	struct {
     98 		vaddr_t va;
     99 		paddr_t pa;
    100 		size_t sz;
    101 	} head;
    102 	struct {
    103 		vaddr_t va;
    104 		paddr_t pa;
    105 		size_t sz;
    106 	} text;
    107 	struct {
    108 		vaddr_t va;
    109 		paddr_t pa;
    110 		size_t sz;
    111 	} rodata;
    112 	struct {
    113 		vaddr_t va;
    114 		paddr_t pa;
    115 		size_t sz;
    116 	} data;
    117 	struct {
    118 		vaddr_t va;
    119 		paddr_t pa;
    120 		size_t sz;
    121 	} boot;
    122 	vaddr_t spareva;
    123 	vaddr_t pdir;
    124 	vaddr_t emodule;
    125 };
    126 
    127 /* console.c */
    128 void init_cons();
    129 void print_ext(int, char *);
    130 void print(char *);
    131 void print_state(bool, char *);
    132 void print_banner();
    133 
    134 /* elf.c */
    135 size_t elf_get_head_size(vaddr_t);
    136 void elf_build_head(vaddr_t);
    137 void elf_get_text(paddr_t *, size_t *);
    138 void elf_build_text(vaddr_t, paddr_t);
    139 void elf_get_rodata(paddr_t *, size_t *);
    140 void elf_build_rodata(vaddr_t, paddr_t);
    141 void elf_get_data(paddr_t *, size_t *);
    142 void elf_build_data(vaddr_t, paddr_t);
    143 void elf_build_boot(vaddr_t, paddr_t);
    144 vaddr_t elf_kernel_reloc();
    145 
    146 /* locore.S */
    147 void lidt(void *);
    148 uint64_t rdtsc();
    149 void jump_kernel();
    150 
    151 /* mm.c */
    152 void mm_init(paddr_t);
    153 paddr_t mm_vatopa(vaddr_t);
    154 void mm_bootspace_mprotect();
    155 void mm_map_kernel();
    156 
    157 /* prekern.c */
    158 void fatal(char *);
    159