234 lines
4.4 KiB
ArmAsm
234 lines
4.4 KiB
ArmAsm
// APM BIOS support for the Bochs BIOS
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// Copyright (C) 2004 Fabrice Bellard
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#if defined(APM_REAL)
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#define APMSYM(s) apmreal_ ## s
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#elif defined(APM_PROT16)
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#define APMSYM(s) apm16_ ## s
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#elif defined(APM_PROT32)
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#define APMSYM(s) apm32_ ## s
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#else
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#error unsupported APM mode
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#endif
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#if DEBUG_APM
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APMSYM(put_str):
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push eax
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push ebx
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push edx
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mov ebx, eax
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mov dx, #INFO_PORT
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APMSYM(put_str1):
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SEG CS
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mov al, byte ptr [bx]
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cmp al, #0
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je APMSYM(put_str2)
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outb dx, al
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inc ebx
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jmp APMSYM(put_str1)
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APMSYM(put_str2):
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pop edx
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pop ebx
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pop eax
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ret
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; print the hex number in eax
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APMSYM(put_num):
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push eax
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push ebx
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push ecx
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push edx
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mov ecx, eax
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mov bx, #8
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mov dx, #INFO_PORT
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APMSYM(put_num1):
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mov eax, ecx
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shr eax, #28
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add al, #0x30
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cmp al, #0x39
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jbe APMSYM(put_num2)
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add al, #0x27
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APMSYM(put_num2):
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outb dx, al
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shl ecx, #4
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dec bx
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jne APMSYM(put_num1)
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mov al, #0x0a
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outb dx, al
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pop edx
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pop ecx
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pop ebx
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pop eax
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ret
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APMSYM(msg_ax):
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.ascii "APM: EAX="
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db 0
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#endif
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#if defined(APM_PROT32)
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_apm32_entry:
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#endif
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#if defined(APM_PROT16)
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_apm16_entry:
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#endif
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pushf
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#if defined(APM_REAL)
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_apmreal_entry:
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#endif
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#if DEBUG_APM
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push eax
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mov eax, #APMSYM(msg_ax)
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call APMSYM(put_str)
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pop eax
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call APMSYM(put_num)
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#endif
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#if defined(APM_REAL)
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;-----------------
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; APM installation check
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APMSYM(00):
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cmp al, #0x00
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jne APMSYM(01)
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mov ah, #1 // APM major version
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mov al, #2 // APM minor version
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mov bh, #0x50 // 'P'
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mov bl, #0x4d // 'M'
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// bit 0 : 16 bit interface supported
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// bit 1 : 32 bit interface supported
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mov cx, #0x2
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jmp APMSYM(ok)
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;-----------------
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; APM real mode interface connect
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APMSYM(01):
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cmp al, #0x01
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jne APMSYM(03)
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jmp APMSYM(ok)
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;-----------------
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; APM 32 bit protected mode interface connect
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APMSYM(03):
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cmp al, #0x03
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jne APMSYM(04)
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mov ax, #0xf000 // 32 bit code segment base
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mov ebx, #_apm32_entry
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mov cx, #0xf000 // 16 bit code segment base
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// 32 bit code segment size (low 16 bits)
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// 16 bit code segment size (high 16 bits)
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mov esi, #0xfff0fff0
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mov dx, #0xf000 // data segment address
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mov di, #0xfff0 // data segment length
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jmp APMSYM(ok)
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#endif
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;-----------------
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; APM interface disconnect
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APMSYM(04):
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cmp al, #0x04
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jne APMSYM(07)
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jmp APMSYM(ok)
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;-----------------
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; APM Set Power State
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APMSYM(07):
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cmp al, #0x07
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jne APMSYM(0a)
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cmp bx, #1
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jne APMSYM(ok)
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cmp cx, #3
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jne APMSYM(ok)
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// send power off event to emulator
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cli
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mov dx, #0x8900
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mov al, #0x53 // 'S'
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out dx, al
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mov al, #0x68 // 'h'
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out dx, al
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mov al, #0x75 // 'u'
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out dx, al
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mov al, #0x74 // 't'
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out dx, al
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mov al, #0x64 // 'd'
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out dx, al
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mov al, #0x6f // 'o'
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out dx, al
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mov al, #0x77 // 'w'
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out dx, al
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mov al, #0x6e // 'n'
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out dx, al
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APMSYM(07_1):
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hlt
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jmp APMSYM(07_1)
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;-----------------
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; Get Power Status
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APMSYM(0a):
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cmp al, #0x0a
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jne APMSYM(0b)
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mov bh, #0x01 // on line
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mov bl, #0xff // unknown battery status
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mov ch, #0x80 // no system battery
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mov cl, #0xff // unknown remaining time
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mov dx, #0xffff // unknown remaining time
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mov si, #0 // zero battery
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jmp APMSYM(ok)
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;-----------------
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; Get PM Event
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APMSYM(0b):
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cmp al, #0x0b
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jne APMSYM(0e)
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mov ah, #0x80 // no event pending
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jmp APMSYM(error)
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;-----------------
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; APM Driver Version
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APMSYM(0e):
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cmp al, #0x0e
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jne APMSYM(unimplemented)
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mov ah, ch
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mov al, cl
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jmp APMSYM(ok)
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;-----------------
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APMSYM(ok):
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popf
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clc
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#if defined(APM_REAL)
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jmp iret_modify_cf
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#else
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retf
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#endif
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APMSYM(unimplemented):
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APMSYM(error):
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popf
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stc
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#if defined(APM_REAL)
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jmp iret_modify_cf
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#else
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retf
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#endif
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#undef APM_PROT32
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#undef APM_PROT16
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#undef APM_REAL
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#undef APMSYM
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