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#define FOOLOS_MODULE_NAME "kernel"
#ifdef __linux__
#error "Watchout! this is not Linux but FoolOS. Use a cross-compiler"
#endif
#include <stdint.h>
#include "config.h"
#include "lib/logger/log.h"
#include "timer.h"
#include "mem.h"
#include "vmem.h"
#include "interrupts.h"
#include "syscalls.h" // for syscall_execve
#include "console.h"
// for built-in shell
#include "lib/buffer/ringbuffer.h"
#include "task.h"
// CODE FOR Stack Smashing Protector, TODO: MOVE / and do not duplicate
// with sys.c
// http://wiki.osdev.org/Stack_Smashing_Protector
#if UINT32_MAX == UINTPTR_MAX
#define STACK_CHK_GUARD 0xe2dee396
#else
#define STACK_CHK_GUARD 0x595e9fbd94fda766
#endif
uintptr_t __stack_chk_guard = STACK_CHK_GUARD;
__attribute__((noreturn))
void __stack_chk_fail(void)
{
panic(FOOLOS_MODULE_NAME,"Stack smashing detected");
}
//
// mp informs us if this if this is the main processor
void kernel_main(uint32_t initial_stack, int mp)
{
//
// Configuring the PIT timer.
//
timer_init();
//
// Memory Init
//
// after this is set up we will be able to allocate and deallocate
// blocks of physical memory :)
//
// we know that here, the bootloader placed the memory map and
// the number of entries.
//
mem_init(0xa001,*((uint16_t *)(0xa000)));
//
// Activate Virtual Memory (paging)
// 0x8048000 is where user programms start!
vmem_init();
//
// init output to screen
//
console_init();
// log buffered messages to console
log_log();
//
// Setup Interrupts (code segment: 0x08)
//
int_init(0x08);
//
// Gather Info about other processors. (APs)
// ACPI or MP
//
//
/*
smp_processors procdata;
if(!acpi_find(&procdata))
if(!mp_find(&procdata))
panic(FOOLOS_MODULE_NAME,"ACPI and MP search failed! I do not want to continue!");
*/
task_init();
while(1);
// load and run foolshell
// we will come back into the kernel only on interrupts...
/*
static char *argv[]={"/bin/foolshell",NULL};
static char *env[]={"PATH=/bin","PWD=/home/miguel","PS1=$ ",NULL};
syscall_execve("/bin/foolshell",argv,env);
*/
//
// Start the other Processors (also before paging for some reason!)
//
//smp_log_procdata(&procdata);
//smp_start_aps(&procdata,0x80000); // starts at 0x80000
// but it will be copied over mbr
//
// Scan the PCI Bus
//
// We are interested in the E1000 Network Adapter in particular
// Its driver will be hopefully implemented one day ;) TODO
//
//pci_init();
//
// Initialize Multitasking
//
// For now this starts three "tasks" which are scheduled
// round robin style.
//
//task_init();
// Just hang around here, if its reached.
// we do our tasks anyway. on the next clock tick.
// while(1);
}
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