diff options
Diffstat (limited to 'sw/z80/build/kernel/memory.asm')
| -rw-r--r-- | sw/z80/build/kernel/memory.asm | 186 |
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) |