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prekern.h revision 1.17 
      1 /*	$NetBSD: prekern.h,v 1.17 2017/11/26 10:21:20 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 <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");
     41 typedef uint64_t paddr_t;
     42 typedef uint64_t vaddr_t;
     43 typedef uint64_t pt_entry_t;
     44 typedef uint64_t pte_prot_t;
     45 #define WHITE_ON_BLACK 0x07
     46 #define RED_ON_BLACK 0x04
     47 #define GREEN_ON_BLACK 0x02
     48 
     49 #define HEAD_WINDOW_BASE	(KERNBASE - NBPD_L3)
     50 #define HEAD_WINDOW_SIZE	NBPD_L3
     51 
     52 #define KASLR_WINDOW_BASE	KERNBASE		/* max - 2GB */
     53 #define KASLR_WINDOW_SIZE	(2LLU * (1 << 30))	/* 2GB */
     54 
     55 /* -------------------------------------------------------------------------- */
     56 
     57 #define BTSEG_NONE	0
     58 #define BTSEG_TEXT	1
     59 #define BTSEG_RODATA	2
     60 #define BTSEG_DATA	3
     61 #define BTSPACE_NSEGS	64
     62 struct bootspace {
     63 	struct {
     64 		vaddr_t va;
     65 		paddr_t pa;
     66 		size_t sz;
     67 	} head;
     68 	struct {
     69 		int type;
     70 		vaddr_t va;
     71 		paddr_t pa;
     72 		size_t sz;
     73 	} segs[BTSPACE_NSEGS];
     74 	struct {
     75 		vaddr_t va;
     76 		paddr_t pa;
     77 		size_t sz;
     78 	} boot;
     79 	vaddr_t spareva;
     80 	vaddr_t pdir;
     81 	vaddr_t emodule;
     82 };
     83 
     84 /* console.c */
     85 void init_cons(void);
     86 void print_ext(int, char *);
     87 void print(char *);
     88 void print_state(bool, char *);
     89 void print_banner(void);
     90 
     91 /* elf.c */
     92 size_t elf_get_head_size(vaddr_t);
     93 void elf_build_head(vaddr_t);
     94 void elf_map_sections(void);
     95 void elf_build_boot(vaddr_t, paddr_t);
     96 vaddr_t elf_kernel_reloc(void);
     97 
     98 /* locore.S */
     99 void cpuid(uint32_t, uint32_t, uint32_t *);
    100 void lidt(void *);
    101 uint64_t rdtsc(void);
    102 int rdseed(uint64_t *);
    103 int rdrand(uint64_t *);
    104 void jump_kernel(vaddr_t);
    105 
    106 /* mm.c */
    107 void mm_init(paddr_t);
    108 void mm_bootspace_mprotect(void);
    109 vaddr_t mm_map_segment(int, paddr_t, size_t, size_t);
    110 void mm_map_kernel(void);
    111 
    112 /* prekern.c */
    113 void fatal(char *);
    114