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x86: add prep_c function

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Assembly language start code will enter here, which sets up
early kernel initialization and then calls z_cstart() when
finished.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-08-05 16:17:48 -07:00 • committed by Andrew Boie
commit 02629b69b5
4 changed files with 32 additions and 19 deletions
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15
arch/x86/include/ia32/kernel_arch_func.h
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@ -43,20 +43,7 @@ void z_x86_paging_init(void);
*/
static inline void kernel_arch_init(void)
{
_kernel.nested = 0;
_kernel.irq_stack = Z_THREAD_STACK_BUFFER(_interrupt_stack) +
CONFIG_ISR_STACK_SIZE;
#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
z_x86_early_serial_init();
#endif
#ifdef CONFIG_X86_MMU
z_x86_paging_init();
#endif
#if CONFIG_X86_STACK_PROTECTION
z_x86_mmu_set_flags(&z_x86_kernel_pdpt, _interrupt_stack, MMU_PAGE_SIZE,
MMU_ENTRY_READ, MMU_PTE_RW_MASK, true);
#endif
/* No-op on this arch */
}
/**