Espresso/arch/x86/misc_asm.s

/*
  A bunch of functions I could have written in C (or not), but decided not to,
  Mostly so I could get more experience in assembler.
*/


.section .text

.global _enable_paging_asm

.global _hang_asm
.global _halt_asm

.global _sti_asm
.global _cli_asm


_enable_paging_asm:
    push %eax
    
    mov %cr0, %eax
    or $0x80000000, %eax
    mov %eax, %cr0
    
    pop %eax
    
    ret
    
_hang_asm:
    hlt
    jmp _hang_asm
  
_halt_asm:
    nop
    ret

_sti_asm:
    sti
    ret
    
_cli_asm:
    cli
    ret