| 0,0 → 1,95 |
|---|
| |
| |
| #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)) |
| printf ("boot_device = 0x%x\n", (unsigned) boot_mbi->boot_device); |
| |
| /* Is the command line passed? */ |
| if (CHECK_FLAG (boot_mbi->flags, 2)) |
| printf ("cmdline = %s\n", (char *) boot_mbi->cmdline); |
| |
| /* Are mods_* valid? */ |
| if (CHECK_FLAG (boot_mbi->flags, 3)) |
| { |
| module_t *mod; |
| int i; |
| |
| printf ("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; |
| printf (" 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; |
| |
| printf ("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; |
| |
| printf (" 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; |
| |
| }; |
| |