40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_INT86
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*
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* The parameters for this kernel call are:
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* m1_p1: INT86_REG86
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*/
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#include "kernel/system.h"
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#include <minix/type.h>
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#include <minix/endpoint.h>
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#include <machine/int86.h>
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#include "arch_proto.h"
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struct reg86u reg86;
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/*===========================================================================*
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* do_int86 *
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*===========================================================================*/
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PUBLIC int do_int86(struct proc * caller, message * m_ptr)
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{
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data_copy(caller->p_endpoint, (vir_bytes) m_ptr->INT86_REG86,
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KERNEL, (vir_bytes) ®86, sizeof(reg86));
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int86();
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/* Copy results back to the caller */
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data_copy(KERNEL, (vir_bytes) ®86,
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caller->p_endpoint, (vir_bytes) m_ptr->INT86_REG86, sizeof(reg86));
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/* The BIOS call eats interrupts. Call get_randomness to generate some
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* entropy. Normally, get_randomness is called from an interrupt handler.
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* Figuring out the exact source is too complicated. CLOCK_IRQ is normally
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* not very random.
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*/
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get_randomness(&krandom, CLOCK_IRQ);
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return(OK);
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}
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