Subversion Repositories Spectranet

[/] [trunk/] [installer/] [baseinst.asm] - Rev 570

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;The MIT License
;
;Copyright (c) 2010 Dylan Smith
;
;Permission is hereby granted, free of charge, to any person obtaining a copy
;of this software and associated documentation files (the "Software"), to deal
;in the Software without restriction, including without limitation the rights
;to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
;copies of the Software, and to permit persons to whom the Software is
;furnished to do so, subject to the following conditions:
;
;The above copyright notice and this permission notice shall be included in
;all copies or substantial portions of the Software.
;
;THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
;OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
;THE SOFTWARE.
.include        "ctrlchars.inc"
.include        "spectranet.inc"

; Spectranet firmware installer.
.section main
F_main:
        call F_pagein                   ; page in and disable interrupts
        call F_clear_impl
        ld hl, 0
        add hl, sp
        ld (v_stack), hl                ; save stack

        call F_erase
        call F_writepages

        jp F_exit
.text
;---------------------------
; Erase all the sectors that we will occupy.
F_erase:
        ld hl, STR_erase0
        call F_print
        xor a
        call F_FlashEraseSector
        ret nc
.erasefail:
        ld hl, STR_erasefailed
        call F_print
        jp F_exit

F_writepages:
        ld hl, STR_page0
        call F_print
        ld a, 0x00
        call F_setpageB
        ld hl, PAGE0
        ld de, 0x2000
        ld bc, PAGE0LEN
        call F_FlashWriteBlock
        jp c, .writefailed

        ld hl, STR_page1
        call F_print
        ld a, 0x01
        call F_setpageB
        ld hl, PAGE1
        ld de, 0x2000
        ld bc, PAGE1LEN
        call F_FlashWriteBlock
        jp c, .writefailed

        ld hl, STR_page2
        call F_print
        ld a, 0x02
        call F_setpageB
        ld hl, PAGE2
        ld de, 0x2000
        ld bc, PAGE2LEN
        call F_FlashWriteBlock
        jp c, .writefailed

        ld hl, STR_page3
        call F_print
        ld a, 0x03
        call F_setpageB
        ld hl, PAGE3
        ld de, 0x2000
        ld bc, PAGE3LEN
        call F_FlashWriteBlock
        jr c, .writefailed

        ld hl, STR_jumptable
        call F_print
        ld hl, JUMPTABLE
        ld de, 0x2F00
        ld bc, JUMPTABLELEN
        call F_FlashWriteBlock

        ret nc

.writefailed:
        ld hl, STR_writefailed
        call F_print
        jp F_exit

;---------------------
; Restore stack and leave.
F_exit:
        ld sp, (v_stack)
        ld bc, CTRLREG
        xor a
        out (c), a
        ei
        ret

F_pagein:
        di
        ld bc, CTRLREG
        ld a, 1
        out (c), a
        ret

F_print:
.loop:
        ld a, (hl)
        and a
        ret z
        call F_putc_5by8_impl
        inc hl
        jr .loop

.data
STR_erase0:     defb "Erasing sector 0",NEWLINE,0
STR_erasefailed: defb "Erase failed.",NEWLINE,0
STR_page0:      defb "Writing page 0", NEWLINE,0
STR_page1:      defb "Writing page 1", NEWLINE,0
STR_page2:      defb "Writing page 2", NEWLINE,0
STR_page3:      defb "Writing page 3", NEWLINE,0
STR_jumptable:  defb "Writing jump table", NEWLINE,0
STR_writefailed: defb "Write failed.",NEWLINE,0

.bss
v_stack:        defw 0

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