File system initialization

Simple I/O (sio) interfaced, not yet implemented

1 files changed, 186 insertions, 0 deletions

diff --git a/sw/z80/build/kernel/memory.asm b/sw/z80/build/kernel/memory.asm
new file mode 100644
index 0000000..ffa5214
--- /dev/null
+++ b/sw/z80/build/kernel/memory.asm
@@ -0,0 +1,186 @@
+;--------------------------------------------------------
+; 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)