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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> 022 #include <hwcore/idt.h> 023 #include <hwcore/gdt.h> 023 #include <hwcore/gdt.h> 024 #include <hwcore/irq.h> 024 #include <hwcore/irq.h> 025 #include <hwcore/exception.h> 025 #include <hwcore/exception.h> 026 #include <hwcore/i8254.h> 026 #include <hwcore/i8254.h> 027 #include <sos/list.h> 027 #include <sos/list.h> 028 #include <sos/physmem.h> 028 #include <sos/physmem.h> 029 #include <hwcore/paging.h> 029 #include <hwcore/paging.h> 030 #include <sos/kmem_vmm.h> !! 030 #include <sos/list.h> 031 #include <sos/kmalloc.h> << 032 #include <sos/klibc.h> 031 #include <sos/klibc.h> 033 #include <sos/assert.h> 032 #include <sos/assert.h> 034 #include <drivers/x86_videomem.h> 033 #include <drivers/x86_videomem.h> 035 #include <drivers/bochs.h> 034 #include <drivers/bochs.h> 036 035 037 036 038 /* Helper function to display each bits of a 3 037 /* Helper function to display each bits of a 32bits integer on the 039 screen as dark or light carrets */ 038 screen as dark or light carrets */ 040 static void display_bits(unsigned char row, un 039 static void display_bits(unsigned char row, unsigned char col, 041 unsigned char attribu 040 unsigned char attribute, 042 sos_ui32_t integer) 041 sos_ui32_t integer) 043 { 042 { 044 int i; 043 int i; 045 /* Scan each bit of the integer, MSb first * 044 /* Scan each bit of the integer, MSb first */ 046 for (i = 31 ; i >= 0 ; i--) 045 for (i = 31 ; i >= 0 ; i--) 047 { 046 { 048 /* Test if bit i of 'integer' is set */ 047 /* Test if bit i of 'integer' is set */ 049 int bit_i = (integer & (1 << i)); 048 int bit_i = (integer & (1 << i)); 050 /* Ascii 219 => dark carret, Ascii 177 = 049 /* Ascii 219 => dark carret, Ascii 177 => light carret */ 051 unsigned char ascii_code = bit_i?219:177 050 unsigned char ascii_code = bit_i?219:177; 052 sos_x86_videomem_putchar(row, col++, 051 sos_x86_videomem_putchar(row, col++, 053 attribute, 052 attribute, 054 ascii_code); 053 ascii_code); 055 } 054 } 056 } 055 } 057 056 058 057 059 /* Clock IRQ handler */ 058 /* Clock IRQ handler */ 060 static void clk_it(int intid) 059 static void clk_it(int intid) 061 { 060 { 062 static sos_ui32_t clock_count = 0; 061 static sos_ui32_t clock_count = 0; 063 062 064 display_bits(0, 48, 063 display_bits(0, 48, 065 SOS_X86_VIDEO_FG_LTGREEN | SOS_ 064 SOS_X86_VIDEO_FG_LTGREEN | SOS_X86_VIDEO_BG_BLUE, 066 clock_count); 065 clock_count); 067 clock_count++; 066 clock_count++; 068 067 069 } 068 } 070 struct digit << 071 { << 072 struct digit *prev, *next; << 073 char value; << 074 }; << 075 << 076 /* Representation of a big (positive) integer: << 077 (MSD) is the HEAD of the list. Least Signif << 078 TAIL of the list */ << 079 typedef struct digit * big_number_t; << 080 << 081 << 082 /* Add a new digit after the LSD */ << 083 void bn_push_lsd(big_number_t * bn, char value << 084 { << 085 struct digit *d; << 086 d = (struct digit*) sos_kmalloc(sizeof(struc << 087 SOS_ASSERT_FATAL(d != NULL); << 088 d->value = value; << 089 list_add_tail(*bn, d); << 090 } << 091 << 092 << 093 /* Add a new digit before the MSD */ << 094 void bn_push_msd(big_number_t * bn, char value << 095 { << 096 struct digit *d; << 097 d = (struct digit*) sos_kmalloc(sizeof(struc << 098 SOS_ASSERT_FATAL(d != NULL); << 099 d->value = value; << 100 list_add_head(*bn, d); << 101 } << 102 << 103 << 104 /* Construct a big integer from a (machine) in << 105 big_number_t bn_new(unsigned long int i) << 106 { << 107 big_number_t retval; << 108 << 109 list_init(retval); << 110 do << 111 { << 112 bn_push_msd(&retval, i%10); << 113 i /= 10; << 114 } << 115 while (i != 0); << 116 << 117 return retval; << 118 } << 119 << 120 << 121 /* Create a new big integer from another big i << 122 big_number_t bn_copy(const big_number_t bn) << 123 { << 124 big_number_t retval; << 125 int nb_elts; << 126 struct digit *d; << 127 << 128 list_init(retval); << 129 list_foreach(bn, d, nb_elts) << 130 { << 131 bn_push_lsd(&retval, d->value); << 132 } << 133 << 134 return retval; << 135 } << 136 << 137 << 138 /* Free the memory used by a big integer */ << 139 void bn_del(big_number_t * bn) << 140 { << 141 struct digit *d; << 142 << 143 list_collapse(*bn, d) << 144 { << 145 sos_kfree((sos_vaddr_t)d); << 146 } << 147 } << 148 << 149 << 150 /* Shift left a big integer: bn := bn*10^shift << 151 void bn_shift(big_number_t *bn, int shift) << 152 { << 153 for ( ; shift > 0 ; shift --) << 154 { << 155 bn_push_lsd(bn, 0); << 156 } << 157 } << 158 << 159 << 160 /* Dump the big integer in bochs */ << 161 void bn_print_bochs(const big_number_t bn) << 162 { << 163 int nb_elts; << 164 const struct digit *d; << 165 << 166 if (list_is_empty(bn)) << 167 sos_bochs_printf("0"); << 168 else << 169 list_foreach(bn, d, nb_elts) << 170 sos_bochs_printf("%d", d->value); << 171 } << 172 069 173 /* Dump the big integer on the console */ !! 070 /* Page fault exception handler */ 174 void bn_print_console(unsigned char row, unsig !! 071 static void pgflt_ex(int exid) 175 unsigned char attribute, << 176 const big_number_t bn, << 177 int nb_decimals) << 178 { 072 { 179 if (list_is_empty(bn)) !! 073 sos_bochs_printf("Got page fault\n"); 180 sos_x86_videomem_printf(row, col, attribut !! 074 sos_x86_videomem_printf(10, 30, 181 else !! 075 SOS_X86_VIDEO_FG_LTRED | SOS_X86_VIDEO_BG_BLUE, 182 { !! 076 "Got EXPECTED (?) Page fault ! But where ???"); 183 int nb_elts; !! 077 for (;;) ; 184 const struct digit *d; << 185 unsigned char x = col; << 186 << 187 list_foreach(bn, d, nb_elts) << 188 { << 189 if (nb_elts == 0) << 190 { << 191 sos_x86_videomem_printf(row, x, << 192 x += 2; << 193 } << 194 else if (nb_elts < nb_decimals) << 195 { << 196 sos_x86_videomem_printf(row, x, << 197 x ++; << 198 } << 199 } << 200 << 201 sos_x86_videomem_printf(row, x, attribut << 202 } << 203 } 078 } 204 079 205 !! 080 static void test_paging(sos_vaddr_t sos_kernel_core_top_vaddr) 206 /* Result is the addition of 2 big integers */ << 207 big_number_t bn_add (const big_number_t bn1, c << 208 { 081 { 209 big_number_t retval; !! 082 /* The (linear) address of the page holding the code we are 210 const struct digit *d1, *d2; !! 083 currently executing */ 211 sos_bool_t bn1_end = FALSE, bn2_end = FALSE !! 084 sos_vaddr_t vpage_code = SOS_PAGE_ALIGN_INF(test_paging); 212 char carry = 0; << 213 << 214 list_init(retval); << 215 d1 = list_get_tail(bn1); << 216 bn1_end = list_is_empty(bn1); << 217 d2 = list_get_tail(bn2); << 218 bn2_end = list_is_empty(bn2); << 219 do << 220 { << 221 if (! bn1_end) << 222 carry += d1->value; << 223 if (! bn2_end) << 224 carry += d2->value; << 225 << 226 bn_push_msd(&retval, carry % 10); << 227 carry /= 10; << 228 << 229 if (! bn1_end) << 230 d1 = d1->prev; << 231 if (! bn2_end) << 232 d2 = d2->prev; << 233 if (d1 == list_get_tail(bn1)) << 234 bn1_end = TRUE; << 235 if (d2 == list_get_tail(bn2)) << 236 bn2_end = TRUE; << 237 } << 238 while (!bn1_end || !bn2_end); << 239 << 240 if (carry > 0) << 241 { << 242 bn_push_msd(&retval, carry); << 243 } << 244 085 245 return retval; !! 086 /* The new physical page that will hold the code */ 246 } !! 087 sos_paddr_t ppage_new; 247 << 248 << 249 /* Result is the multiplication of a big integ << 250 big_number_t bn_muli (const big_number_t bn, c << 251 { << 252 big_number_t retval; << 253 int nb_elts; << 254 char carry = 0; << 255 const struct digit *d; << 256 088 257 list_init(retval); !! 089 /* Where this page will be mapped temporarily in order to copy the 258 list_foreach_backward(bn, d, nb_elts) !! 090 code into it: right after the kernel code/data */ 259 { !! 091 sos_vaddr_t vpage_tmp = sos_kernel_core_top_vaddr; 260 carry += d->value * digit; << 261 bn_push_msd(&retval, carry % 10); << 262 carry /= 10; << 263 } << 264 092 265 if (carry > 0) !! 093 unsigned i; 266 { << 267 bn_push_msd(&retval, carry); << 268 } << 269 094 270 return retval; !! 095 /* Bind the page fault exception to one of our routines */ 271 } !! 096 sos_exception_set_routine(SOS_EXCEPT_PAGE_FAULT, >> 097 pgflt_ex); 272 098 >> 099 /* >> 100 * Test 1: move the page where we execute the code elsewhere in >> 101 * physical memory >> 102 */ >> 103 sos_x86_videomem_printf(4, 0, >> 104 SOS_X86_VIDEO_FG_LTGREEN | SOS_X86_VIDEO_BG_BLUE, >> 105 "Moving current code elsewhere in physical memory:"); 273 106 274 /* Result is the multiplication of 2 big integ << 275 big_number_t bn_mult(const big_number_t bn1, c << 276 { << 277 int shift = 0; << 278 big_number_t retval; << 279 int nb_elts; << 280 struct digit *d; << 281 107 282 list_init(retval); !! 108 /* Allocate a new physical page */ 283 list_foreach_backward(bn2, d, nb_elts) !! 109 ppage_new = sos_physmem_ref_physpage_new(FALSE); >> 110 if (! ppage_new) 284 { 111 { 285 big_number_t retmult = bn_muli(bn1, d->v !! 112 /* STOP ! No memory left */ 286 big_number_t old_retval = retval; !! 113 sos_x86_videomem_putstring(20, 0, 287 bn_shift(& retmult, shift); !! 114 SOS_X86_VIDEO_FG_LTRED 288 retval = bn_add(old_retval, retmult); !! 115 | SOS_X86_VIDEO_BG_BLUE, 289 bn_del(& retmult); !! 116 "test_paging : Cannot allocate page"); 290 bn_del(& old_retval); !! 117 return; 291 shift ++; << 292 } 118 } 293 119 294 return retval; !! 120 sos_x86_videomem_printf(5, 0, 295 } !! 121 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, >> 122 "Hello from the address 0x%x in physical memory", >> 123 sos_paging_get_paddr(vpage_code)); 296 124 >> 125 sos_x86_videomem_printf(6, 0, >> 126 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, >> 127 "Transfer vpage 0x%x: ppage 0x%x -> 0x%x (tmp vpage 0x%x)", >> 128 vpage_code, >> 129 sos_paging_get_paddr(vpage_code), >> 130 ppage_new, >> 131 (unsigned)vpage_tmp); >> 132 >> 133 /* Map the page somewhere (right after the kernel mapping) in order >> 134 to copy the code we are currently executing */ >> 135 sos_paging_map(ppage_new, vpage_tmp, >> 136 FALSE, >> 137 SOS_VM_MAP_ATOMIC >> 138 | SOS_VM_MAP_PROT_READ >> 139 | SOS_VM_MAP_PROT_WRITE); >> 140 >> 141 /* Ok, the new page is referenced by the mapping, we can release our >> 142 reference to it */ >> 143 sos_physmem_unref_physpage(ppage_new); >> 144 >> 145 /* Copy the contents of the current page of code to this new page >> 146 mapping */ >> 147 memcpy((void*)vpage_tmp, >> 148 (void*)vpage_code, >> 149 SOS_PAGE_SIZE); >> 150 >> 151 /* Transfer the mapping of the current page of code to this new page */ >> 152 sos_paging_map(ppage_new, vpage_code, >> 153 FALSE, >> 154 SOS_VM_MAP_ATOMIC >> 155 | SOS_VM_MAP_PROT_READ >> 156 | SOS_VM_MAP_PROT_WRITE); >> 157 >> 158 /* Ok, here we are: we have changed the physcal page that holds the >> 159 code we are executing ;). However, this new page is mapped at 2 >> 160 virtual addresses: >> 161 - vpage_tmp >> 162 - vpage_code >> 163 We can safely unmap it from sos_kernel_core_top_vaddr, while >> 164 still keeping the vpage_code mapping */ >> 165 sos_paging_unmap(vpage_tmp); 297 166 298 /* Result is the factorial of an integer */ !! 167 sos_x86_videomem_printf(7, 0, 299 big_number_t bn_fact(unsigned long int v) !! 168 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, 300 { !! 169 "Hello from the address 0x%x in physical memory", 301 unsigned long int i; !! 170 sos_paging_get_paddr(vpage_code)); 302 big_number_t retval = bn_new(1); << 303 for (i = 1 ; i <= v ; i++) << 304 { << 305 big_number_t I = bn_new(i); << 306 big_number_t tmp = bn_mult(retval, I); << 307 sos_x86_videomem_printf(4, 0, << 308 SOS_X86_VIDEO_BG << 309 "%d! = ", (int)i << 310 bn_print_console(4, 8, SOS_X86_VIDEO_BG_ << 311 tmp, 55); << 312 bn_del(& I); << 313 bn_del(& retval); << 314 retval = tmp; << 315 } << 316 171 317 return retval; !! 172 sos_x86_videomem_printf(9, 0, 318 } !! 173 SOS_X86_VIDEO_FG_LTGREEN | SOS_X86_VIDEO_BG_BLUE, >> 174 "Provoking a page fault:"); 319 175 >> 176 /* >> 177 * Test 2: make sure the #PF handler works >> 178 */ 320 179 321 void bn_test() !! 180 /* Scan part of the kernel up to a page fault. This page fault 322 { !! 181 should occur on the first page unmapped after the kernel area, 323 big_number_t bn = bn_fact(1000); !! 182 which is exactly the page we temporarily mapped/unmapped 324 sos_bochs_printf("1000! = "); !! 183 (vpage_tmp) above to move the kernel code we are executing */ 325 bn_print_bochs(bn); !! 184 for (i = vpage_code ; /* none */ ; i += SOS_PAGE_SIZE) 326 sos_bochs_printf("\n"); !! 185 { 327 !! 186 unsigned *pint = (unsigned *)SOS_PAGE_ALIGN_INF(i); >> 187 sos_bochs_printf("Test vaddr 0x%x : val=", (unsigned)pint); >> 188 sos_x86_videomem_printf(10, 0, >> 189 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, >> 190 "Test vaddr 0x%x : val= ", >> 191 (unsigned)pint); >> 192 sos_bochs_printf("0x%x\n", *pint); >> 193 sos_x86_videomem_printf(10, 30, >> 194 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, >> 195 "0x%x ", *pint); >> 196 } >> 197 >> 198 /* BAD ! Did not get the page fault... */ >> 199 sos_x86_videomem_printf(20, 0, >> 200 SOS_X86_VIDEO_FG_LTRED | SOS_X86_VIDEO_BG_BLUE, >> 201 "We should have had a #PF at vaddr 0x%x !", >> 202 vpage_tmp); 328 } 203 } 329 204 330 << 331 /* The C entry point of our operating system * 205 /* The C entry point of our operating system */ 332 void sos_main(unsigned long magic, unsigned lo 206 void sos_main(unsigned long magic, unsigned long addr) 333 { 207 { 334 unsigned i; 208 unsigned i; 335 sos_paddr_t sos_kernel_core_base_paddr, sos_ 209 sos_paddr_t sos_kernel_core_base_paddr, sos_kernel_core_top_paddr; 336 210 337 /* Grub sends us a structure, called multibo 211 /* Grub sends us a structure, called multiboot_info_t with a lot of 338 precious informations about the system, s 212 precious informations about the system, see the multiboot 339 documentation for more information. */ 213 documentation for more information. */ 340 multiboot_info_t *mbi; 214 multiboot_info_t *mbi; 341 mbi = (multiboot_info_t *) addr; 215 mbi = (multiboot_info_t *) addr; 342 216 343 /* Setup bochs and console, and clear the co 217 /* Setup bochs and console, and clear the console */ 344 sos_bochs_setup(); 218 sos_bochs_setup(); 345 219 346 sos_x86_videomem_setup(); 220 sos_x86_videomem_setup(); 347 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE); 221 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE); 348 222 349 /* Greetings from SOS */ 223 /* Greetings from SOS */ 350 if (magic == MULTIBOOT_BOOTLOADER_MAGIC) 224 if (magic == MULTIBOOT_BOOTLOADER_MAGIC) 351 /* Loaded with Grub */ 225 /* Loaded with Grub */ 352 sos_x86_videomem_printf(1, 0, 226 sos_x86_videomem_printf(1, 0, 353 SOS_X86_VIDEO_FG_Y 227 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, 354 "Welcome From GRUB 228 "Welcome From GRUB to %s%c RAM is %dMB (upper mem = 0x%x kB)", 355 "SOS", ',', 229 "SOS", ',', 356 (unsigned)(mbi->me 230 (unsigned)(mbi->mem_upper >> 10) + 1, 357 (unsigned)mbi->mem 231 (unsigned)mbi->mem_upper); 358 else 232 else 359 /* Not loaded with grub */ 233 /* Not loaded with grub */ 360 sos_x86_videomem_printf(1, 0, 234 sos_x86_videomem_printf(1, 0, 361 SOS_X86_VIDEO_FG_Y 235 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, 362 "Welcome to SOS"); 236 "Welcome to SOS"); 363 237 364 sos_bochs_putstring("Message in a bochs\n"); 238 sos_bochs_putstring("Message in a bochs\n"); 365 239 366 /* Setup CPU segmentation and IRQ subsystem 240 /* Setup CPU segmentation and IRQ subsystem */ 367 sos_gdt_setup(); 241 sos_gdt_setup(); 368 sos_idt_setup(); 242 sos_idt_setup(); 369 243 370 /* Setup SOS IRQs and exceptions subsystem * 244 /* Setup SOS IRQs and exceptions subsystem */ 371 sos_exceptions_setup(); 245 sos_exceptions_setup(); 372 sos_irq_setup(); 246 sos_irq_setup(); 373 247 374 /* Configure the timer so as to raise the IR 248 /* Configure the timer so as to raise the IRQ0 at a 100Hz rate */ 375 sos_i8254_set_frequency(100); 249 sos_i8254_set_frequency(100); 376 250 377 251 378 /* We need a multiboot-compliant boot loader 252 /* We need a multiboot-compliant boot loader to get the size of the RAM */ 379 if (magic != MULTIBOOT_BOOTLOADER_MAGIC) 253 if (magic != MULTIBOOT_BOOTLOADER_MAGIC) 380 { 254 { 381 sos_x86_videomem_putstring(20, 0, 255 sos_x86_videomem_putstring(20, 0, 382 SOS_X86_VIDEO 256 SOS_X86_VIDEO_FG_LTRED 383 | SOS_X86_V 257 | SOS_X86_VIDEO_BG_BLUE 384 | SOS_X86_V 258 | SOS_X86_VIDEO_FG_BLINKING, 385 "I'm not load 259 "I'm not loaded with Grub !"); 386 /* STOP ! */ 260 /* STOP ! */ 387 for (;;) 261 for (;;) 388 continue; 262 continue; 389 } 263 } 390 264 391 /* Binding some HW interrupts and exceptions 265 /* Binding some HW interrupts and exceptions to software routines */ 392 sos_irq_set_routine(SOS_IRQ_TIMER, 266 sos_irq_set_routine(SOS_IRQ_TIMER, 393 clk_it); 267 clk_it); 394 /* Enabling the HW interrupts here, this wil 268 /* Enabling the HW interrupts here, this will make the timer HW 395 interrupt call our clk_it handler */ 269 interrupt call our clk_it handler */ 396 asm volatile ("sti\n"); 270 asm volatile ("sti\n"); 397 /* Multiboot says: "The value returned for u 271 /* Multiboot says: "The value returned for upper memory is maximally 398 the address of the first upper memory hol 272 the address of the first upper memory hole minus 1 megabyte.". It 399 also adds: "It is not guaranteed to be th 273 also adds: "It is not guaranteed to be this value." aka "YMMV" ;) */ 400 sos_physmem_setup((mbi->mem_upper<<10) + (1< 274 sos_physmem_setup((mbi->mem_upper<<10) + (1<<20), 401 & sos_kernel_core_base_pad 275 & sos_kernel_core_base_paddr, 402 & sos_kernel_core_top_padd 276 & sos_kernel_core_top_paddr); 403 277 404 /* 278 /* 405 * Switch to paged-memory mode 279 * Switch to paged-memory mode 406 */ 280 */ 407 281 408 /* Disabling interrupts should seem more cor 282 /* Disabling interrupts should seem more correct, but it's not really 409 necessary at this stage */ 283 necessary at this stage */ 410 if (sos_paging_setup(sos_kernel_core_base_pa 284 if (sos_paging_setup(sos_kernel_core_base_paddr, 411 sos_kernel_core_top_pad 285 sos_kernel_core_top_paddr)) 412 sos_bochs_printf("Could not setup paged me 286 sos_bochs_printf("Could not setup paged memory mode\n"); 413 sos_x86_videomem_printf(2, 0, 287 sos_x86_videomem_printf(2, 0, 414 SOS_X86_VIDEO_FG_YEL 288 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE, 415 "Paged-memory mode i 289 "Paged-memory mode is activated"); 416 290 417 !! 291 test_paging(sos_kernel_core_top_paddr); 418 if (sos_kmem_vmm_setup(sos_kernel_core_base_ << 419 sos_kernel_core_top_p << 420 sos_bochs_printf("Could not setup the Kern << 421 << 422 if (sos_kmalloc_setup()) << 423 sos_bochs_printf("Could not setup the Kmal << 424 << 425 /* Run some kmalloc tests */ << 426 bn_test(); << 427 292 428 /* An operatig system never ends */ 293 /* An operatig system never ends */ 429 for (;;) 294 for (;;) 430 continue; 295 continue; 431 296 432 return; 297 return; 433 } 298 }
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