1 #include <machine/asm.h>
    2 __FBSDID("$FreeBSD$");
    3 
    4 /*
    5  * This is cribbed from the Linux thinkpad-4.1 driver by
    6  * Thomas Hood.
    7  */
    8 
    9 smapi32_entry:                                  /* far pointer to SMAPI entry */
   10         .globl  smapi32_offset
   11 smapi32_offset:         .long   0x00000000      /* set by caller */
   12 smapi32_segment:        .word   0x0000          /* %cs stored here */
   13 
   14         .text
   15 /*
   16  * smapi32(input_param, output_param)
   17  *      struct smapi_bios_parameter *input_parm;
   18  *      struct smapi_bios_parameter *output_parm;
   19  *
   20  *      stack frame:
   21  *              0x00 : saved ebp
   22  *              0x04 : return EIP
   23  *              0x08 : input_parm
   24  *              0x0c : output_parm
   25  */
   26 ENTRY(smapi32)
   27         pushl   %ebp                    /* Save frame */
   28         movl    %esp,%ebp
   29 
   30         pushl   %ds
   31         pushl   0x0c(%ebp)              /* Output Param */
   32         pushl   %ds
   33         pushl   0x08(%ebp)              /* Input Param */
   34 
   35         movl    $0,%eax                 /* Clear EAX (return 0) */
   36         movw    %cs,smapi32_segment     /* Save CS */
   37         lcall   *(smapi32_offset)
   38 
   39         leave
   40         ret
   41 END(smapi32)
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