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|
;--------------------------------------------------------
; File Created by SDCC : free open source ANSI-C Compiler
; Version 3.5.0 #9253 (Mar 24 2016) (Linux)
; This file was generated Wed Aug 23 21:44:59 2017
;--------------------------------------------------------
.module memory
.optsdcc -mz80
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
.globl _pages_table
.globl _mmu_write_table
.globl _page_map
.globl _page_unmap
;--------------------------------------------------------
; special function registers
;--------------------------------------------------------
;--------------------------------------------------------
; ram data
;--------------------------------------------------------
.area _DATA
_pages_table::
.ds 192
;--------------------------------------------------------
; ram data
;--------------------------------------------------------
.area _INITIALIZED
;--------------------------------------------------------
; absolute external ram data
;--------------------------------------------------------
.area _DABS (ABS)
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
.area _HOME
.area _GSINIT
.area _GSFINAL
.area _GSINIT
;--------------------------------------------------------
; Home
;--------------------------------------------------------
.area _HOME
.area _HOME
;--------------------------------------------------------
; code
;--------------------------------------------------------
.area _CODE
;kernel/memory.c:5: int mmu_write_table(void)
; ---------------------------------
; Function mmu_write_table
; ---------------------------------
_mmu_write_table::
;kernel/memory.c:9: for (i = 0; i < PAGES_MAX_COUNT; i++) {
ld hl,#0x0000
00102$:
inc hl
ld a,l
sub a, #0x20
ld a,h
rla
ccf
rra
sbc a, #0x80
jr C,00102$
;kernel/memory.c:15: return 0;
ld hl,#0x0000
ret
;kernel/memory.c:18: int page_map(int page, int pid, uint16_t addr)
; ---------------------------------
; Function page_map
; ---------------------------------
_page_map::
push ix
ld ix,#0
add ix,sp
;kernel/memory.c:20: if (page >= PAGES_MAX_COUNT)
ld a,4 (ix)
sub a, #0x20
ld a,5 (ix)
rla
ccf
rra
sbc a, #0x80
jr C,00102$
;kernel/memory.c:21: return -1;
ld hl,#0xFFFF
jr 00105$
00102$:
;kernel/memory.c:23: if (pages_table[page].used)
ld de,#_pages_table+0
ld c,4 (ix)
ld b,5 (ix)
ld l, c
ld h, b
add hl, hl
add hl, bc
add hl, hl
add hl,de
ld c,l
ld b,h
ld a,(hl)
and a,#0x01
jr Z,00104$
;kernel/memory.c:24: return -2;
ld hl,#0xFFFE
jr 00105$
00104$:
;kernel/memory.c:26: pages_table[page].addr = addr;
ld e, c
ld d, b
inc de
inc de
push bc
ld hl, #0x000A
add hl, sp
ld bc, #0x0004
ldir
pop bc
;kernel/memory.c:27: pages_table[page].pid = pid;
ld l, c
ld h, b
inc hl
ld a,6 (ix)
ld (hl),a
;kernel/memory.c:29: pages_table[page].used = 1;
ld a,(bc)
or a,#0x01
ld (bc),a
;kernel/memory.c:30: return 0;
ld hl,#0x0000
00105$:
pop ix
ret
;kernel/memory.c:33: int page_unmap(int page)
; ---------------------------------
; Function page_unmap
; ---------------------------------
_page_unmap::
push ix
ld ix,#0
add ix,sp
;kernel/memory.c:35: if (page >= PAGES_MAX_COUNT)
ld a,4 (ix)
sub a, #0x20
ld a,5 (ix)
rla
ccf
rra
sbc a, #0x80
jr C,00102$
;kernel/memory.c:36: return -1;
ld hl,#0xFFFF
jr 00105$
00102$:
;kernel/memory.c:38: if (pages_table[page].used == 0)
ld de,#_pages_table+0
ld c,4 (ix)
ld b,5 (ix)
ld l, c
ld h, b
add hl, hl
add hl, bc
add hl, hl
add hl,de
ld e,l
ld d,h
ld a,(hl)
and a,#0x01
jr NZ,00104$
;kernel/memory.c:39: return -2;
ld hl,#0xFFFE
jr 00105$
00104$:
;kernel/memory.c:41: pages_table[page].used = 0;
ld a,(de)
and a,#0xFE
ld (de),a
;kernel/memory.c:42: return 0;
ld hl,#0x0000
00105$:
pop ix
ret
.area _CODE
.area _INITIALIZER
.area _CABS (ABS)
|
