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debug.c 6.28 KiB
/*
* =====================================================================================
*
* Filename: debug.c
*
* Description:
*
* Version: 1.0
* Created: 16.11.2011 14:01:37
* Revision: none
* Compiler: gcc
*
* Author: Georg Wassen (gw) (wassen@lfbs.rwth-aachen.de),
* Company: Lehrstuhl für Betriebssysteme (Chair for Operating Systems)
* RWTH Aachen University
*
* Copyright (c) 2011, Georg Wassen, RWTH Aachen University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* =====================================================================================
*/
#include "stddef.h"
#include "info_struct.h"
#include "system.h"
#include "lib.h"
#include "cpu.h"
#include "multiboot_struct.h"
void print_multiboot_info(void)
{
multiboot_info_t *mbi = (multiboot_info_t*)(ptr_t)hw_info.mb_adr;
char mem_type[][10] = {"mem", "other"};
printf("Multiboot-Flags: 0x%x\n", mbi->flags);
if (mbi->flags & (1<<0)) {
printf("flags[0] - mem_lower: 0x%x=%d mem_upper: 0x%x=%d\n", mbi->mem_lower, mbi->mem_lower, mbi->mem_upper, mbi->mem_upper);
}
if (mbi->flags & (1<<1)) {
printf("flags[1] - boot_device: %x %x %x %x (Part 3/2/1 / Drive)\n", mbi->boot_device&0xFF, (mbi->boot_device>>8)&0xFF,
(mbi->boot_device>>16)&0xFF, (mbi->boot_device>>24)&0xFF);
}
if (mbi->flags & (1<<2)) {
printf("flags[2] - cmdline: '%s'\n", mbi->cmdline);
}
if (mbi->flags & (1<<3)) {
printf("flags[3] - mods_count: %d mods_addr: 0x%x\n", mbi->mods_count, mbi->mods_addr);
unsigned i;
for (i=0; i<mbi->mods_count; i++) {
printf(" mod[%d]...\n", i);
}
}
if (mbi->flags & (1<<4)) {
printf("flags[4] - Symbol table for a.out image...\n");
}
if (mbi->flags & (1<<5)) {
printf("flags[5] - Section header table for ELF kernel...\n");
}
if (mbi->flags & (1<<6)) {
printf("flags[6] - mmap_length: %d mmap_addr: 0x%x\n", mbi->mmap_length, mbi->mmap_addr);
multiboot_memory_map_t* p = (multiboot_memory_map_t*)(long)mbi->mmap_addr;
for ( ; p < (multiboot_memory_map_t*)(long)(mbi->mmap_addr+mbi->mmap_length); p = ((void*)p + p->size + 4)) {
printf(" mmap[0x%x] - addr:0x%x len:0x%x type: %d (%s)\n",
p, (multiboot_uint32_t)(p->addr), (multiboot_uint32_t)(p->len), p->type, mem_type[p->type==1?0:1]);
}
}
/* more bits available in flags, but their display is not implemented, yet */
/* see: http://www.gnu.org/software/grub/manual/multiboot/multiboot.html#Boot-information-format */
}
void print_smp_info(void)
{
unsigned eax, ebx, ecx, edx;
volatile unsigned *register_apic_id;
unsigned i;
cpuid(0x0B, &eax, &ebx, &ecx, &edx);
printf("APIC ID from CPUID.0BH:EDX[31:0]: %d\n", edx);
register_apic_id = (volatile unsigned *) (0xFEE00000 + 0x20);
i = *register_apic_id;
i = i >> 24;
printf("local APIC ID from register: %d\n", i);
cpuid(0x01, &eax, &ebx, &ecx, &edx);
printf("support SMP: %d\n", edx & (1<<28));
printf("addressable logical processors: %d\n", (ebx>>16)&0xFF);
cpuid2(0x04, 0x00, &eax, &ebx, &ecx, &edx);
i = (eax>>26)+1;
printf("addressable processor cores: %d\n", i);
}
static inline void stackdump(int from, int to)
{
long *sp;
long *p;
# ifdef __x86_64__
__asm__ volatile ("mov %%rsp, %%rax" : "=a"(sp));
# else
__asm__ volatile ("mov %%esp, %%eax" : "=a"(sp));
# endif
printf("sp: %x\n", sp);
for (p = sp-to; p <= sp-from; p++) {
printf("[%x] %x\n", p, *p);
}
}
void multiboot_info(void){
multiboot_info_t *p_mbi;
printf("hw_info.mb_adr = %x\n", hw_info.mb_adr);
p_mbi = (multiboot_info_t*)(ptr_t)hw_info.mb_adr;
printf("p_mbi->flags = %x\n", p_mbi->flags);
if (p_mbi->flags & (1<<2)) {
printf("p_mbi->cmdline = %x ", p_mbi->cmdline);
char *str = (char*)(ptr_t)p_mbi->cmdline;
printf("'%s'\n", str);
}
printf("hw_info->cmd_maxcpu = %u\n", hw_info.cmd_maxcpu);
printf("hw_info->cmd_cpumask = %u\n", hw_info.cmd_cpumask);
}
/* deactivate warning on divide-by-zero, b/c this is intentional in this function */
#pragma GCC diagnostic ignored "-Wdiv-by-zero"
void test_div_zero()
{
printf("DIV ZERO in 1 sec ");
udelay(100000);
printf("9");
udelay(100000);
printf("8");
udelay(100000);
printf("7");
udelay(100000);
printf("6");
udelay(100000);
printf("5");
udelay(100000);
printf("4");
udelay(100000);
printf("3");
udelay(100000);
printf("2");
udelay(100000);
printf("1");
udelay(100000);
printf("0");
udelay(100000);
printf("1/0 = %d", 1/0); /* divide by zero to test DIVZERO exception */
printf("\nafter DIV ZERO\n");
udelay(500000);
}