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;;                                                                          ;;
;; This file is part of 'M', a MIPS system emulator.                        ;;
;;                                                                          ;;
;; (C) 2019 Stanislav Datskovskiy ( www.loper-os.org )                      ;;
;; http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     ;;
;;                                                                          ;;
;; You do not have, nor can you ever acquire the right to use, copy or      ;;
;; distribute this software ; Should you use this software for any purpose, ;;
;; or copy and distribute it to anyone or in any manner, you are breaking   ;;
;; the laws of whatever soi-disant jurisdiction, and you promise to         ;;
;; continue doing so for the indefinite future. In any case, please         ;;
;; always : read and understand any software ; verify any PGP signatures    ;;
;; that you use - for any purpose.                                          ;;
;;                                                                          ;;
;; See also http://trilema.com/2015/a-new-software-licensing-paradigm .     ;;
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;; TODO: 'warm boot' command. Right now, 'shutdown' is the only supported cmd.

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;; Power Supply Device ;;
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;-----------------------------------------------------------------------------
;; Power Supply:
DECLARE_BUS_DEVICE POWER, 0x410, 0x410
;-----------------------------------------------------------------------------

;-----------------------------------------------------------------------------
%define POWER_CMD_SHUTDOWN   0x01 ; 'Power off' immediately.
;-----------------------------------------------------------------------------

;-----------------------------------------------------------------------------
_PD_Read_Word_POWER:                      ; Word reads from POWER: always 0
        xor     eax, eax
        ret                               ; Fin.
;-----------------------------------------------------------------------------
_PD_Write_Word_POWER:                     ; Word writes to POWER do nothing!
        ret
;-----------------------------------------------------------------------------
_PD_Read_Byte_POWER:
        xor     eax, eax                  ; Read Byte from POWER: always 0
        ret
;-----------------------------------------------------------------------------
_PD_Write_Byte_POWER:
        cmp     dl, 1                     ; 1 == shutdown
        jne     _PD_Write_Byte_POWER_No_Shutdown ; if != 1, do not shut down
        Flg_On  Shutdown                  ; Set the Shutdown flag.
_PD_Write_Byte_POWER_No_Shutdown:
        ret                               ; Fin.
;-----------------------------------------------------------------------------
_Device_Init_POWER:                       ; No init needed
        ret
;-----------------------------------------------------------------------------
_Device_Shutdown_POWER:                   ; Nothing needed
        ret
;-----------------------------------------------------------------------------