diff options
Diffstat (limited to 'sys/i386/bios/smapi_bios.S')
| -rw-r--r-- | sys/i386/bios/smapi_bios.S | 45 |
1 files changed, 17 insertions, 28 deletions
diff --git a/sys/i386/bios/smapi_bios.S b/sys/i386/bios/smapi_bios.S index 3e24a4ed0ace..3a280055902b 100644 --- a/sys/i386/bios/smapi_bios.S +++ b/sys/i386/bios/smapi_bios.S @@ -3,11 +3,28 @@ __FBSDID("$FreeBSD$"); #include <machine/asmacros.h> +/* + * This is cribbed from the Linux thinkpad-4.1 driver by + * Thomas Hood. + */ + + .align +smapi32_entry: /* far pointer to SMAPI entry */ + .globl smapi32_offset +smapi32_offset: .long 0x00000000 /* set by caller */ +smapi32_segment: .word 0x0000 /* %cs stored here */ + .text /* * smapi32(input_param, output_param) * struct smapi_bios_parameter *input_parm; * struct smapi_bios_parameter *output_parm; + * + * stack frame: + * 0x00 : saved ebp + * 0x04 : return EIP + * 0x08 : input_parm + * 0x0c : output_parm */ ENTRY(smapi32) pushl %ebp /* Save frame */ @@ -24,31 +41,3 @@ ENTRY(smapi32) leave ret - -/* - * smapi32(offset, segment, input_param, output_param) - * u_int offset; - * u_short segment; - * struct smapi_bios_parameter *input_parm; - * struct smapi_bios_parameter *output_parm; - */ -ENTRY(smapi32_new) - pushl %ebp /* Save frame */ - movl %esp,%ebp - - movl 0x08(%ebp),%eax - movl %eax,smapi32_offset - movw 0x0c(%ebp),%ax - movw %ax,smapi32_segment - - pushl %ds - pushl 0x20(%ebp) /* Output Param */ - pushl %ds - pushl 0x10(%ebp) /* Input Param */ - - movl $0,%eax - movw %cs,smapi32_segment - lcall *(smapi32_offset) - - leave - ret |