Navigation
- Accueil
- Présentation :
- FAQ
- Bugs et errata
- Contributions de lecteurs
- Téléchargements
- LXR (référencement des sources)
- Mailing-list
- Liens et Projets reliés
Site hébergé par :
Site hébergé par :
|
[ source navigation ] [ diff markup ] [ identifier search ] [ general search ] |
|||
|
||||
001 /* Copyright (C) 2004 The SOS Team 001 /* Copyright (C) 2004 The SOS Team 002 Copyright (C) 1999 Free Software Foundatio 002 Copyright (C) 1999 Free Software Foundation, Inc. 003 003 004 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 005 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 006 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 007 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 008 008 009 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU General Public License for more details 012 GNU General Public License for more details. 013 013 014 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 015 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 017 USA. 017 USA. 018 */ 018 */ 019 019 020 /* Include definitions of the multiboot standa 020 /* Include definitions of the multiboot standard */ 021 #include <bootstrap/multiboot.h> 021 #include <bootstrap/multiboot.h> 022 #include <hwcore/idt.h> << 023 #include <hwcore/gdt.h> << 024 #include <hwcore/irq.h> << 025 #include <hwcore/exception.h> << 026 #include <hwcore/i8254.h> << 027 #include <sos/list.h> << 028 #include <sos/physmem.h> << 029 #include <sos/klibc.h> 022 #include <sos/klibc.h> 030 #include <sos/assert.h> 023 #include <sos/assert.h> 031 #include <drivers/x86_videomem.h> 024 #include <drivers/x86_videomem.h> 032 #include <drivers/bochs.h> 025 #include <drivers/bochs.h> 033 026 034 027 035 /* Helper function to display each bits of a 3 << 036 screen as dark or light carrets */ << 037 static void display_bits(unsigned char row, un << 038 unsigned char attribu << 039 sos_ui32_t integer) << 040 { << 041 int i; << 042 /* Scan each bit of the integer, MSb first * << 043 for (i = 31 ; i >= 0 ; i--) << 044 { << 045 /* Test if bit i of 'integer' is set */ << 046 int bit_i = (integer & (1 << i)); << 047 /* Ascii 219 => dark carret, Ascii 177 = << 048 unsigned char ascii_code = bit_i?219:177 << 049 sos_x86_videomem_putchar(row, col++, << 050 attribute, << 051 ascii_code); << 052 } << 053 } << 054 << 055 << 056 /* Clock IRQ handler */ << 057 static void clk_it(int intid) << 058 { << 059 static sos_ui32_t clock_count = 0; << 060 << 061 display_bits(0, 48, << 062 SOS_X86_VIDEO_FG_LTGREEN | SOS_ << 063 clock_count); << 064 clock_count++; << 065 << 066 } << 067 << 068 #define MY_PPAGE_NUM_INT 511 << 069 struct my_ppage << 070 { << 071 sos_ui32_t before[MY_PPAGE_NUM_INT]; << 072 struct my_ppage *prev, *next; << 073 sos_ui32_t after[MY_PPAGE_NUM_INT]; << 074 }; /* sizeof() Must be <= 4kB */ << 075 << 076 static void test_physmem() << 077 { << 078 /* We place the pages we did allocate here * << 079 struct my_ppage *ppage_list, *my_ppage; << 080 sos_count_t num_alloc_ppages = 0, num_free_p << 081 << 082 ppage_list = NULL; << 083 while ((my_ppage = (struct my_ppage*)sos_phy << 084 != NULL) << 085 { << 086 int i; << 087 num_alloc_ppages++; << 088 << 089 /* Print the allocation status */ << 090 sos_x86_videomem_printf(2, 0, << 091 SOS_X86_VIDEO_FG << 092 | SOS_X86_VIDEO_ << 093 "Could allocate << 094 num_alloc_ppages << 095 << 096 /* We fill this page with its address */ << 097 for (i = 0 ; i < MY_PPAGE_NUM_INT ; i++) << 098 my_ppage->before[i] = my_ppage->after[ << 099 << 100 /* We add this page at the tail of our l << 101 list_add_tail(ppage_list, my_ppage); << 102 } << 103 << 104 /* Now we release these pages in FIFO order << 105 while ((my_ppage = list_pop_head(ppage_list) << 106 { << 107 /* We make sure this page was not overwr << 108 value */ << 109 int i; << 110 for (i = 0 ; i < MY_PPAGE_NUM_INT ; i++) << 111 { << 112 /* We don't get what we expect ! */ << 113 if ((my_ppage->before[i] != (sos_ui << 114 || (my_ppage->after[i] != (sos_ << 115 { << 116 /* STOP ! */ << 117 sos_x86_videomem_putstring(20, 0 << 118 SOS_X << 119 | S << 120 "Page << 121 return; << 122 } << 123 } << 124 << 125 /* Release the descriptor */ << 126 if (sos_physmem_unref_physpage((sos_padd << 127 { << 128 /* STOP ! */ << 129 sos_x86_videomem_putstring(20, 0, << 130 SOS_X86_V << 131 | SOS_X << 132 "Cannot r << 133 return; << 134 } << 135 << 136 /* Print the deallocation status */ << 137 num_free_ppages ++; << 138 sos_x86_videomem_printf(2, 0, << 139 SOS_X86_VIDEO_FG << 140 | SOS_X86_VIDEO_ << 141 "Could free %d p << 142 num_free_ppages) << 143 } << 144 << 145 /* Print the overall stats */ << 146 sos_x86_videomem_printf(2, 0, << 147 SOS_X86_VIDEO_FG_LTG << 148 | SOS_X86_VIDEO_BG_B << 149 "Could allocate %d b << 150 num_alloc_ppages << << 151 num_free_ppages << S << 152 << 153 SOS_ASSERT_FATAL(num_alloc_ppages == num_fre << 154 } << 155 << 156 028 157 /* The C entry point of our operating system * 029 /* The C entry point of our operating system */ 158 void sos_main(unsigned long magic, unsigned lo 030 void sos_main(unsigned long magic, unsigned long addr) 159 { 031 { 160 unsigned i; 032 unsigned i; 161 sos_paddr_t sos_kernel_core_base_paddr, sos_ << 162 033 163 /* Grub sends us a structure, called multibo 034 /* Grub sends us a structure, called multiboot_info_t with a lot of 164 precious informations about the system, s 035 precious informations about the system, see the multiboot 165 documentation for more information. */ 036 documentation for more information. */ 166 multiboot_info_t *mbi; 037 multiboot_info_t *mbi; 167 mbi = (multiboot_info_t *) addr; 038 mbi = (multiboot_info_t *) addr; 168 039 169 /* Setup bochs and console, and clear the co 040 /* Setup bochs and console, and clear the console */ 170 sos_bochs_setup(); 041 sos_bochs_setup(); 171 042 172 sos_x86_videomem_setup(); 043 sos_x86_videomem_setup(); 173 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE); 044 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE); 174 045 175 /* Greetings from SOS */ 046 /* Greetings from SOS */ 176 if (magic == MULTIBOOT_BOOTLOADER_MAGIC) 047 if (magic == MULTIBOOT_BOOTLOADER_MAGIC) 177 /* Loaded with Grub */ 048 /* Loaded with Grub */ 178 sos_x86_videomem_printf(1, 0, 049 sos_x86_videomem_printf(1, 0, 179 SOS_X86_VIDEO_FG_Y 050 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, 180 "Welcome From GRUB 051 "Welcome From GRUB to %s%c RAM is %dMB (upper mem = 0x%x kB)", 181 "SOS", ',', 052 "SOS", ',', 182 (unsigned)(mbi->me 053 (unsigned)(mbi->mem_upper >> 10) + 1, 183 (unsigned)mbi->mem 054 (unsigned)mbi->mem_upper); 184 else 055 else 185 /* Not loaded with grub */ 056 /* Not loaded with grub */ 186 sos_x86_videomem_printf(1, 0, 057 sos_x86_videomem_printf(1, 0, 187 SOS_X86_VIDEO_FG_Y 058 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, 188 "Welcome to SOS"); 059 "Welcome to SOS"); 189 060 190 sos_bochs_putstring("Message in a bochs\n"); 061 sos_bochs_putstring("Message in a bochs\n"); 191 062 192 /* Setup CPU segmentation and IRQ subsystem << 193 sos_gdt_setup(); << 194 sos_idt_setup(); << 195 << 196 /* Setup SOS IRQs and exceptions subsystem * << 197 sos_exceptions_setup(); << 198 sos_irq_setup(); << 199 << 200 /* Configure the timer so as to raise the IR << 201 sos_i8254_set_frequency(100); << 202 << 203 << 204 /* We need a multiboot-compliant boot loader << 205 if (magic != MULTIBOOT_BOOTLOADER_MAGIC) << 206 { << 207 sos_x86_videomem_putstring(20, 0, << 208 SOS_X86_VIDEO << 209 | SOS_X86_V << 210 | SOS_X86_V << 211 "I'm not load << 212 /* STOP ! */ << 213 for (;;) << 214 continue; << 215 } << 216 << 217 /* Binding some HW interrupts and exceptions << 218 sos_irq_set_routine(SOS_IRQ_TIMER, << 219 clk_it); << 220 /* Enabling the HW interrupts here, this wil << 221 interrupt call our clk_it handler */ << 222 asm volatile ("sti\n"); << 223 /* Multiboot says: "The value returned for u << 224 the address of the first upper memory hol << 225 also adds: "It is not guaranteed to be th << 226 sos_physmem_setup((mbi->mem_upper<<10) + (1< << 227 & sos_kernel_core_base_pad << 228 & sos_kernel_core_top_padd << 229 test_physmem(); << 230 063 231 /* An operatig system never ends */ 064 /* An operatig system never ends */ 232 for (;;) 065 for (;;) 233 continue; 066 continue; 234 067 235 return; 068 return; 236 } 069 }
| [ source navigation ] | [ diff markup ] | [ identifier search ] | [ general search ] |