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prekern.h revision 1.24 
      1 /*	$NetBSD: prekern.h,v 1.24 2021/05/04 21:09:16 khorben Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2017-2020 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 <lib/libkern/libkern.h>
     35 #include <machine/pte.h>
     36 
     37 #include "pdir.h"
     38 #include "redef.h"
     39 
     40 #define ASSERT(a) if (!(a)) fatal("ASSERT: " #a);
     41 typedef uint64_t pte_prot_t;
     42 #define WHITE_ON_BLACK 0x07
     43 #define RED_ON_BLACK 0x04
     44 #define GREEN_ON_BLACK 0x02
     45 #define YELLOW_ON_BLACK 0x0e
     46 
     47 #define HEAD_WINDOW_BASE	(KERNBASE - NBPD_L3)
     48 #define HEAD_WINDOW_SIZE	NBPD_L3
     49 
     50 #define KASLR_WINDOW_BASE	KERNBASE		/* max - 2GB */
     51 #define KASLR_WINDOW_SIZE	(2LLU * (1 << 30))	/* 2GB */
     52 
     53 typedef enum
     54 {
     55 	STATE_NORMAL = 0,
     56 	STATE_ERROR,
     57 	STATE_WARNING
     58 } state_t;
     59 
     60 /* -------------------------------------------------------------------------- */
     61 
     62 #define BTSEG_NONE	0
     63 #define BTSEG_TEXT	1
     64 #define BTSEG_RODATA	2
     65 #define BTSEG_DATA	3
     66 #define BTSPACE_NSEGS	64
     67 struct bootspace {
     68 	struct {
     69 		vaddr_t va;
     70 		paddr_t pa;
     71 		size_t sz;
     72 	} head;
     73 	struct {
     74 		int type;
     75 		vaddr_t va;
     76 		paddr_t pa;
     77 		size_t sz;
     78 	} segs[BTSPACE_NSEGS];
     79 	struct {
     80 		vaddr_t va;
     81 		paddr_t pa;
     82 		size_t sz;
     83 	} boot;
     84 	vaddr_t spareva;
     85 	vaddr_t pdir;
     86 	vaddr_t smodule;
     87 	vaddr_t emodule;
     88 };
     89 
     90 /* console.c */
     91 void init_cons(void);
     92 void print_ext(int, char *);
     93 void print(char *);
     94 void print_state(state_t, char *);
     95 void print_banner(void);
     96 
     97 /* elf.c */
     98 size_t elf_get_head_size(vaddr_t);
     99 void elf_build_head(vaddr_t);
    100 void elf_fixup_boot(vaddr_t, paddr_t);
    101 void elf_map_sections(void);
    102 void elf_build_info(void);
    103 vaddr_t elf_kernel_reloc(void);
    104 
    105 /* locore.S */
    106 void cpuid(uint32_t, uint32_t, uint32_t *);
    107 void lidt(void *);
    108 uint64_t rdtsc(void);
    109 int rdseed(uint64_t *);
    110 int rdrand(uint64_t *);
    111 void jump_kernel(vaddr_t);
    112 
    113 /* mm.c */
    114 void mm_init(paddr_t);
    115 void mm_bootspace_mprotect(void);
    116 vaddr_t mm_map_segment(int, paddr_t, size_t, size_t);
    117 void mm_map_kernel(void);
    118 
    119 /* prekern.c */
    120 void fatal(char *);
    121 
    122 /* prng.c */
    123 void prng_init(void);
    124 void prng_get_rand(void *, size_t);
    125