83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
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#include "k_bootstrap.h"
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#include "k_main.h"
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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 "sys/cpu.h"
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#include "k_early_panic.h"
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#include "mm/mm.h"
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#include "lang/kio.h"
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#include "isr/interrupts.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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* Multiboot header data block *
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*************************************************************************/
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u32_t mb_header[] __attribute__ ((section (".multiboot_header") )) = {
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MB_HEADER_MAGIC, /* magic */
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MB_HEADER_FLAGS, /* flags */
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-(MB_HEADER_MAGIC + MB_HEADER_FLAGS) /* checksum */
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};
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/**************************************************************************
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* This function is invoked to bootstrap the kernel. *
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*************************************************************************/
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void k_bootstrap(mb_info_t * mb_info, u32_t mb_magic)
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{
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DEBUG_LETTER(1, 'b');
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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(2, 'c');
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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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DEBUG_LETTER(3, 'd');
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interrupts_bootstrap();
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DEBUG_LETTER(4, 'e');
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kio_bootstrap();
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DEBUG_LETTER(5, 'f');
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/* begin using the permanent stack */
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write_esp(KERNEL_STACK_TOP);
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k_main();
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idle_loop();
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}
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void idle_loop()
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{
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for (;;)
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{
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__asm__ __volatile__ ("hlt");
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}
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}
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} /* extern "C" */
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