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prekern.h revision 1.13 
      1 /*	$NetBSD: prekern.h,v 1.13 2017/11/15 18:02:36 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 MM_PROT_READ	0x00
     41 #define MM_PROT_WRITE	0x01
     42 #define MM_PROT_EXECUTE	0x02
     43 
     44 #define ASSERT(a) if (!(a)) fatal("ASSERT");
     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 #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 emodule;
     87 };
     88 
     89 /* console.c */
     90 void init_cons(void);
     91 void print_ext(int, char *);
     92 void print(char *);
     93 void print_state(bool, char *);
     94 void print_banner(void);
     95 
     96 /* elf.c */
     97 size_t elf_get_head_size(vaddr_t);
     98 void elf_build_head(vaddr_t);
     99 void elf_map_sections(void);
    100 void elf_build_boot(vaddr_t, paddr_t);
    101 vaddr_t elf_kernel_reloc(void);
    102 
    103 /* locore.S */
    104 void cpuid(uint32_t, uint32_t, uint32_t *);
    105 void lidt(void *);
    106 uint64_t rdtsc(void);
    107 int rdseed(uint64_t *);
    108 void jump_kernel(vaddr_t);
    109 
    110 /* mm.c */
    111 void mm_init(paddr_t);
    112 paddr_t mm_vatopa(vaddr_t);
    113 void mm_bootspace_mprotect(void);
    114 vaddr_t mm_map_segment(int, paddr_t, size_t, size_t);
    115 void mm_map_kernel(void);
    116 
    117 /* prekern.c */
    118 void fatal(char *);
    119