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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 "types.h"
#include "lib/logger/log.h"
#include "timer.h"
#include "mem.h"
#include "vmem.h"
#include "interrupts.h"
#include "multiboot.h"
#include "console.h"
#include <stddef.h>
// for built-in shell
#include "lib/buffer/ringbuffer.h"
#include "task.h"
void kernel_main(uint32_t eax,uint32_t ebx)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"kernel_main: eax=0x%08X ebx=0x%08X",eax,ebx);
//
// Configuring the PIT timer.
//
timer_init();
//
// Process Multiboot Header
//
if(eax!=0x2badb002)panic(FOOLOS_MODULE_NAME,"EAX was not set properly by your bootlaoder!");
multiboot_information *info;
info=ebx;
if(info->flags&&1<<9)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Loaded by: \"%s\"",info->boot_loader_name);
}
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"multiboot flags: 0x%08X",info->flags);
if(info->flags&&1<<0)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mem_lower: %d KB",info->mem_lower);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mem_upper: %d KB",info->mem_upper);
}
if(info->flags&&1<<2)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"cmdline: \"%s\"",info->cmdline);
}
if(info->flags&&1<<3)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d modules loaded",info->mods_count);
multiboot_mod *mod=info->mods_addr;
for(int i=0;i<info->mods_count;i++)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mod at 0x%08X-0x%08X : %s",
mod->mod_start,mod->mod_end, mod->string);
mod++;
}
}
if(info->flags&&1<<6)
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"memory map of length %d provided by bootloader",info->mmap_length);
uint32_t mmap_addr=info->mmap_addr;
while(mmap_addr<info->mmap_addr+info->mmap_length)
{
multiboot_mmap *mmap=mmap_addr;
uint32_t mem_start=mmap->base_addr;
uint32_t mem_end=mmap->base_addr+mmap->length;
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%08X - %08X / type: %d, size: %d",
mem_start, mem_end, mmap->type, mmap->size);
mmap_addr+=mmap->size+4;
}
}
else panic(FOOLOS_MODULE_NAME,"Unable to continue without memory map, sorry!");
//
// 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((physical_address)0xa001,(int)(*((uint16_t *)(0xa000))));
//
// init output to screen
//
uint32_t physbase=console_init();
//
// Activate Virtual Memory (paging)
// pdirectory *dir=vmem_init(physbase);
// log buffered messages to console
log_log();
while(1);
//
// Setup Interrupts (code segment: 0x08)
//
int_init(0x08);
//
// 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();
//
// 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!");
*/
//
// 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
//
// Initialize Multitasking
//
//task_init(dir); //; this will never return!
}
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