wok annotate linld/stuff/src/LINLD.CPP @ rev 21984

linld: x86 support
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Oct 14 11:20:06 2019 +0200 (2019-10-14)
parents e93e6b4d565f
children a0dccc5d133d
rev   line source
pascal@19515 1 // This file is distributed under GPL
pascal@19515 2 //
pascal@19515 3 // LINLD main() lives here
pascal@19515 4
pascal@19515 5 #include "crtl.h"
pascal@19515 6 #include "common.h"
pascal@19515 7
pascal@21984 8 const char* cmdline = "auto";
pascal@19515 9 const char* kernel_name = "bzImage";
pascal@21984 10 #ifdef USE_ARGSTR
pascal@21984 11 const char* initrd_name = NULL;
pascal@21984 12 #else
pascal@19515 13 const char* initrd_name;
pascal@21984 14 #endif
pascal@20528 15 u32 root_dev;
pascal@20528 16 u32 vid_mode; // -3 = ask
pascal@20528 17 // -2 = Extended VGA
pascal@20528 18 // -1 = Normal VGA
pascal@20528 19 // n = as "n" was pressed
pascal@20528 20 u32 topmem;
pascal@21569 21 u32 base_himem;
pascal@19515 22
pascal@19515 23 inline void syntax() {
pascal@19515 24 die("Syntax:" NL
pascal@19515 25 "LINLD [image=file] [initrd=files] [vga=mode] [root=num] [mem=max] [cl=cmdline]" NL
pascal@19515 26 "vga mode: ask,extended,normal or dec/oct/hex number" NL
pascal@19538 27 "-f force" NL
pascal@21984 28 "-64 for cpu64 only" NL
pascal@19515 29 "Defaults:" NL
pascal@19515 30 "\timage=bzImage" NL
pascal@19515 31 "\tinitrd,vga,root=(void)" NL
pascal@19515 32 "\tmem=256m" NL
pascal@19515 33 "\tcl=auto" NL
pascal@19580 34 "\t-b 1088k" NL
pascal@19515 35 "Use quotes: \"cl=...\" if you need spaces in cmdline" NL
pascal@19538 36 "Use cl=@filename to get it from a file"
pascal@19515 37 #if 1
pascal@19515 38 NL NL "Examples:" NL
pascal@21569 39 "\tLINLD -f -b 64m "
pascal@21569 40 "initrd=rootfs4.gz,rootfs3.gz,rootfs2.gz,rootfs1.gz "
pascal@21822 41 "\"cl=video=-32\""
pascal@20451 42 NL NL "\tLINLD image=memtest"
pascal@19515 43 #endif
pascal@19515 44 );
pascal@19515 45 }
pascal@19515 46
pascal@20453 47 static char buf_cmdline[128];
pascal@19515 48 int main(int argc, char *argv[]) {
pascal@19571 49
pascal@19571 50 (void) argc;
pascal@19571 51
pascal@21569 52 ((u16*) &base_himem)[1] |= (_1m+_64k)>>16; // base_himem = _1m+_64k
pascal@19515 53 puts("LINLD v" VERSION_STR "+");
pascal@19515 54
pascal@19538 55 // Parse command line
pascal@20751 56 #ifdef USE_ARGSTR
pascal@21576 57 if (!argv[1]) syntax();
pascal@21984 58 for (;;) {
pascal@20751 59 const char **clp = &cmdline;
pascal@20751 60 argv++;
pascal@21984 61 if (!*argv) goto boot;
pascal@21984 62 if ((*(u16 *)*argv|2) == 0x362F) { // -64 /64
pascal@21984 63 if (cpuhaslm() == 0) exit();
pascal@21984 64 }
pascal@21984 65 if ((*(u16 *)*argv|0x2002) == 0x662F) { // -F /f
pascal@21984 66 skip_alloc++;
pascal@21984 67 }
pascal@21984 68 else if (argstr(*argv,"cl|image|initrd",clp) != -1);
pascal@21984 69 else if (fileexist(*argv) != -1)
pascal@21984 70 kernel_name=*argv;
pascal@21984 71 else if (argnum(*argv,"root|vga|mem|-b",&root_dev) != -1);
pascal@21984 72 else {
pascal@21984 73 *clp = (const char *) buf_cmdline + 1;
pascal@21984 74 strcatb((const char *) buf_cmdline,*argv);
pascal@21984 75 boot:
pascal@20751 76 puts(*clp);
pascal@20751 77 set_cmdline(*clp);
pascal@20751 78 puts(load_kernel());
pascal@20751 79 load_initrd();
pascal@20751 80 boot_kernel();
pascal@20751 81 }
pascal@20751 82 }
pascal@20751 83 #else
pascal@21576 84 if (!argv[1]) syntax();
pascal@21576 85 while (1) {
pascal@19571 86 char *s;
pascal@19580 87 next:
pascal@19571 88 argv++;
pascal@19571 89 s=*argv;
pascal@19538 90 if (!s) {
pascal@19538 91 puts(load_kernel());
pascal@19538 92 load_initrd();
pascal@19538 93 boot_kernel();
pascal@19538 94 }
pascal@21791 95 if(strhead(s,"initrd=") != -1) {
pascal@21569 96 initrd_name=s+7;
pascal@19538 97 }
pascal@21628 98 else if(strhead(s,"vga=") != -1) {
pascal@21569 99 *(u16*)&vid_mode = (u16)strtol(s+7); // support normal, extended & ask
pascal@19515 100 }
pascal@19580 101 else switch (*(u16 *)s|0x2002) {
pascal@21984 102 case 0x362F: // -64 /64
pascal@21984 103 if (cpuhaslm() == 0) exit();
pascal@21984 104 goto next;
pascal@19580 105 case 0x662F: // -F /f
pascal@19580 106 skip_alloc++;
pascal@19580 107 goto next;
pascal@19580 108 case 0x622F: // -B /b
pascal@19580 109 argv++;
pascal@21569 110 ((u16 *)&base_himem)[1] = (u16)(strtol(*argv)>>16);
pascal@19580 111 goto next;
pascal@19580 112 default:
pascal@21628 113 if(strhead(s,"cl=") != -1) {
pascal@20793 114 cmdline=s+=3;
pascal@20793 115 if (*s == '@') {
pascal@20793 116 static struct image_himem image;
pascal@20793 117 char c;
pascal@19538 118
pascal@20793 119 s++;
pascal@20793 120 image.errmsg = "Error in cl=@file";
pascal@21649 121 open_image(&image, s);
pascal@21569 122 s+=read(image.fd, (void *)cmdline=s=
pascal@21569 123 (char *)malloc_or_die(image.size), image.size);
pascal@20793 124 // Strip any trailing cr/lf
pascal@20793 125 c='\0';
pascal@20793 126 do {
pascal@19538 127 // Replace all other cr/lfs with spaces
pascal@19538 128 s--;
pascal@19538 129 if(*s>=' ') c=' ';
pascal@19538 130 else *s = c;
pascal@20793 131 } while (s>cmdline);
pascal@20793 132 puts("Kernel command line:");
pascal@20793 133 puts(cmdline);
pascal@20793 134 }
pascal@20793 135 }
pascal@21628 136 else if(strhead(s,"root=") != -1) {
pascal@21569 137 *(u16*)&root_dev = (u16)strtol(s+5);
pascal@20793 138 goto addincmdline;
pascal@20793 139 }
pascal@21628 140 else if(strhead(s,"mem=") != -1) {
pascal@21569 141 ((u16 *)&topmem)[1] = (u16)(strtol(s+4)>>16);
pascal@20793 142 goto addincmdline;
pascal@20793 143 }
pascal@21791 144 else if(strhead(s,"image=") != -1) {
pascal@21791 145 s+=6;
pascal@21791 146 set_kernel_name:
pascal@21791 147 kernel_name=s;
pascal@21791 148 }
pascal@20793 149 else {
pascal@20793 150 addincmdline:
pascal@20793 151 if(cmdline == (const char *) buf_cmdline + 1) {
pascal@20793 152 strcatb(buf_cmdline,*argv);
pascal@20793 153 }
pascal@20793 154 else {
pascal@20793 155 if(fileexist(s) != -1) goto set_kernel_name;
pascal@20793 156 cmdline = (const char *) buf_cmdline + 1;
pascal@20793 157 goto addincmdline;
pascal@20793 158 }
pascal@20793 159 }
pascal@19580 160 }
pascal@20793 161 }
pascal@20751 162 #endif
pascal@19515 163
pascal@19515 164 // Let compiler be happy
pascal@19571 165 return _AX;
pascal@19515 166 }