57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
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#include "hos_types.h"
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#include "hos_defines.h"
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#include "multiboot.h"
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#include "k_early_panic.h"
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#include "mm/mm.h"
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#include "mm/stack.h"
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#include "lang/kio.h"
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#define DEBUG_LETTER(col,chr) *(u16_t *)(KERNEL_OFFSET + CONSOLE_MEMORY \
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+ 160 * 8 + (col) * 2) \
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= 0x0700 | (chr)
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extern "C" {
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u8_t bootstrap_stack[4096];
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/**************************************************************************
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* This function is invoked before paging is enabled. Segmentation is *
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* utilized to map virtual address 0xE000_0000 to physical address 0x0. *
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*************************************************************************/
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u32_t k_bootstrap(mb_info_t * mb_info, u32_t mb_magic)
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{
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DEBUG_LETTER(2, 'c');
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if (mb_magic != MB_BOOTLOADER_MAGIC)
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{
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k_early_panic("Bad multiboot magic identifier!");
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}
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if ( ! (mb_info->flags & MB_BOOTLOADER_MMAP) )
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{
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k_early_panic("No memory map provided by bootloader!");
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}
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mb_mmap_t * mmap = (mb_mmap_t *) (mb_info->mmap_addr + KERNEL_OFFSET - 4);
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for (unsigned int sz = 0; sz < mb_info->mmap_length; sz += mmap->size + 4)
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{
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mm_record_mmap_entry(mmap);
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mmap = (mb_mmap_t *) (((u32_t)mmap) + mmap->size + 4);
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}
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DEBUG_LETTER(3, 'd');
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/*
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* These functions could destroy the multiboot information block and
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* associated structures, so we must be finished reading those structures
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* before calling them.
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*/
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mm_bootstrap();
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stack_bootstrap();
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kio_bootstrap();
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return 0;
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}
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} /* extern "C" */
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