forked from KolibriOS/kolibrios
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
|
|
|
|
#include <types.h>
|
|
#include <core.h>
|
|
|
|
#include "multiboot.h"
|
|
|
|
extern u32_t pg_balloc;
|
|
|
|
extern u32_t mem_amount;
|
|
extern u32_t rd_base;
|
|
extern u32_t rd_fat ;
|
|
extern u32_t rd_fat_end ;
|
|
extern u32_t rd_root ;
|
|
extern u32_t rd_root_end ;
|
|
|
|
extern multiboot_info_t *boot_mbi;
|
|
|
|
/* Check if the bit BIT in FLAGS is set. */
|
|
#define CHECK_FLAG(flags,bit) ((flags) & (1 << (bit)))
|
|
|
|
void init()
|
|
{
|
|
u32_t last_page = 0;
|
|
|
|
if (CHECK_FLAG (boot_mbi->flags, 1))
|
|
DBG ("boot_device = 0x%x\n", (unsigned) boot_mbi->boot_device);
|
|
|
|
/* Is the command line passed? */
|
|
if (CHECK_FLAG (boot_mbi->flags, 2))
|
|
DBG ("cmdline = %s\n", (char *) boot_mbi->cmdline);
|
|
|
|
/* Are mods_* valid? */
|
|
if (CHECK_FLAG (boot_mbi->flags, 3))
|
|
{
|
|
module_t *mod;
|
|
int i;
|
|
|
|
DBG ("mods_count = %d, mods_addr = 0x%x\n",
|
|
(u32_t) boot_mbi->mods_count, (u32_t) boot_mbi->mods_addr);
|
|
for (i = 0, mod = (module_t *) boot_mbi->mods_addr;
|
|
i < boot_mbi->mods_count;i++, mod++)
|
|
{
|
|
pg_balloc = mod->mod_end;
|
|
DBG (" mod_start = 0x%x, mod_end = 0x%x, string = %s\n",
|
|
(u32_t) mod->mod_start,(u32_t) mod->mod_end, (char *) mod->string);
|
|
};
|
|
mod--;
|
|
rd_base = mod->mod_start+OS_BASE;
|
|
rd_fat = rd_base + 512;
|
|
rd_fat_end = rd_base + 512 + 4278;
|
|
rd_root = rd_base + 512*19;
|
|
rd_root_end = rd_base + 512*33;
|
|
// printf(" rd_base = %x\n", rd_base);
|
|
}
|
|
|
|
if (CHECK_FLAG (boot_mbi->flags, 6))
|
|
{
|
|
memory_map_t *mmap;
|
|
u32_t page;
|
|
|
|
DBG("mmap_addr = 0x%x, mmap_length = 0x%x\n",
|
|
(unsigned) boot_mbi->mmap_addr, (unsigned) boot_mbi->mmap_length);
|
|
|
|
for (mmap = (memory_map_t *) boot_mbi->mmap_addr;
|
|
(u32_t) mmap < boot_mbi->mmap_addr + boot_mbi->mmap_length;
|
|
mmap = (memory_map_t *) ((u32_t) mmap
|
|
+ mmap->size + sizeof (mmap->size)))
|
|
{
|
|
u32_t page;
|
|
|
|
DBG (" size = 0x%x, base_addr = 0x%x%x,"
|
|
" length = 0x%x%x, type = 0x%x\n",
|
|
(unsigned) mmap->size,
|
|
(unsigned) mmap->base_addr_high,
|
|
(unsigned) mmap->base_addr_low,
|
|
(unsigned) mmap->length_high,
|
|
(unsigned) mmap->length_low,
|
|
(unsigned) mmap->type);
|
|
|
|
if( mmap->type != 1)
|
|
continue;
|
|
page = (mmap->base_addr_low+mmap->length_low)&(~4095);
|
|
if(page > last_page)
|
|
last_page = page;
|
|
}
|
|
}
|
|
|
|
if(last_page > 256*1024*1024)
|
|
last_page = 256*1024*1024;
|
|
|
|
mem_amount = last_page;
|
|
|
|
};
|
|
|