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xen32os
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main
xenia 2024-02-07 19:32:27 +01:00
commit ddbf083d1b
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1
.envrc 100644
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use flake

4
.gitignore vendored 100644
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.direnv
inc
ultlf
xenrom/data

459
flake.lock 100644
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{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_2": {
"inputs": {
"systems": "systems_2"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_3": {
"inputs": {
"systems": "systems_3"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_4": {
"inputs": {
"systems": "systems_4"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_5": {
"inputs": {
"systems": "systems_5"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_6": {
"inputs": {
"systems": "systems_6"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_7": {
"inputs": {
"systems": "systems_7"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"fox32": {
"inputs": {
"flake-utils": "flake-utils_2",
"fox32rom": "fox32rom",
"nixpkgs": "nixpkgs_3"
},
"locked": {
"dirtyRev": "7777dfd3ae2dd85b12dcd60335214a78c7774c60-dirty",
"dirtyShortRev": "7777dfd-dirty",
"lastModified": 1690147702,
"narHash": "sha256-Tn99hPzeOzZ2PaU/22HNO7VoZlMbWUAzPuMV/hfYxS8=",
"type": "git",
"url": "file:../fox32"
},
"original": {
"type": "git",
"url": "file:../fox32"
}
},
"fox32asm": {
"inputs": {
"flake-utils": "flake-utils_4",
"nixpkgs": "nixpkgs"
},
"locked": {
"lastModified": 1706813730,
"narHash": "sha256-U1fg1EId3JOl5hKvMMBGKTMBJ/b94TCL7Z0+NLa/m6M=",
"ref": "refs/heads/main",
"rev": "30da72b3c70a1f43b0de4ee8e2e9d190be1d9bb9",
"revCount": 58,
"type": "git",
"url": "file:../fox32asm/"
},
"original": {
"type": "git",
"url": "file:../fox32asm/"
}
},
"fox32asm_2": {
"inputs": {
"flake-utils": "flake-utils_5",
"nixpkgs": "nixpkgs_4"
},
"locked": {
"dirtyRev": "30da72b3c70a1f43b0de4ee8e2e9d190be1d9bb9-dirty",
"dirtyShortRev": "30da72b-dirty",
"lastModified": 1706813730,
"narHash": "sha256-HfMO2G4V3RiGrAPrhlpi5yziTONpyxs/M4RjyuGmMHE=",
"type": "git",
"url": "file:../fox32asm"
},
"original": {
"type": "git",
"url": "file:../fox32asm"
}
},
"fox32asm_3": {
"inputs": {
"flake-utils": "flake-utils_7",
"nixpkgs": "nixpkgs_5"
},
"locked": {
"lastModified": 1706813730,
"narHash": "sha256-U1fg1EId3JOl5hKvMMBGKTMBJ/b94TCL7Z0+NLa/m6M=",
"ref": "refs/heads/main",
"rev": "30da72b3c70a1f43b0de4ee8e2e9d190be1d9bb9",
"revCount": 58,
"type": "git",
"url": "file:../fox32asm/"
},
"original": {
"type": "git",
"url": "file:../fox32asm/"
}
},
"fox32rom": {
"inputs": {
"flake-utils": "flake-utils_3",
"fox32asm": "fox32asm",
"nixpkgs": "nixpkgs_2"
},
"locked": {
"lastModified": 1706819209,
"narHash": "sha256-yOOADll1zrrpuVtLC1SS/bSTzmNTZBUUXhAAiTVz7PU=",
"ref": "refs/heads/main",
"rev": "b53476353d99cadafba216cddcb29e83326685e4",
"revCount": 180,
"type": "git",
"url": "file:../fox32rom/"
},
"original": {
"type": "git",
"url": "file:../fox32rom/"
}
},
"fox32rom_2": {
"inputs": {
"flake-utils": "flake-utils_6",
"fox32asm": "fox32asm_3",
"nixpkgs": "nixpkgs_6"
},
"locked": {
"lastModified": 1706819209,
"narHash": "sha256-yOOADll1zrrpuVtLC1SS/bSTzmNTZBUUXhAAiTVz7PU=",
"ref": "refs/heads/main",
"rev": "b53476353d99cadafba216cddcb29e83326685e4",
"revCount": 180,
"type": "git",
"url": "file:../fox32rom"
},
"original": {
"type": "git",
"url": "file:../fox32rom"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_2": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_3": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_4": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_5": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_6": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_7": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"fox32": "fox32",
"fox32asm": "fox32asm_2",
"fox32rom": "fox32rom_2",
"nixpkgs": "nixpkgs_7"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_2": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_3": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_4": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_5": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_6": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_7": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

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flake.nix 100644
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{
description = "test stuff for fox32";
inputs = {
fox32asm.url = "git+file:../fox32asm";
fox32.url = "git+file:../fox32";
fox32rom.url = "git+file:../fox32rom";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, fox32asm, fox32, fox32rom, flake-utils }:
flake-utils.lib.eachDefaultSystem (sys:
let pkgs = import nixpkgs { system = sys; };
asm = fox32asm.packages.${sys}.fox32asm;
emulator = fox32.packages.${sys}.fox32;
romdev = fox32rom.packages.${sys}.fox32rom-dev;
py = pkgs.python310;
ultlf = pkgs.stdenv.mkDerivation {
name = "ultlf";
src = pkgs.fetchFromGitHub {
owner = "ultlang"; repo = "ultlf";
rev = "9b867a6cd04a2daf6d44ab9731ecf426d535a8a2";
hash = "sha256-Y7WrkvC+GNZluqzIuXm/2WIlFj/nvJNWTXU6gCvOf5E=";
};
dontBuild = true;
installPhase = ''
mkdir -p $out/data
cp ultlf-data/{codepoints.json,trimmed_baselines.json,data.json} $out/data
'';
};
rom = pkgs.stdenv.mkDerivation rec {
pname = "xen32";
version = "0.0-alpha";
src = ./. ;
buildPhase = ''
mkdir -p inc
mkdir -p xenrom/data
cp ${romdev}/dev/fox32rom.def inc
mkdir -p ultlf
cp ${ultlf}/data/* ultlf
mkdir -p $out/bin/
${py}/bin/python3 ./gen/fontgen.py
${py}/bin/python3 ./gen/logogen.py
${py}/bin/python3 ./gen/vergen.py
${asm}/bin/fox32asm xenrom/main.asm $out/bin/xen32.rom
'';
NIX_SEMVER = version;
NIX_GIT_SHA_SHORT = if self ? rev then builtins.substring 0 7 self.rev else "dirty";
};
in rec {
packages.rom = rom;
packages.run = pkgs.writeScriptBin "xen32-run" ''
${emulator}/bin/fox32 --rom ${packages.rom}/bin/xen32.rom
'';
packages.ultlf = ultlf;
devShells.default = pkgs.mkShell {
packages = [ asm emulator py ];
shellHook = ''
mkdir -p inc
mkdir -p xenrom/data
cp ${romdev}/dev/fox32rom.def inc
mkdir -p ultlf
cp ${ultlf}/data/* ultlf
${py}/bin/python3 ./gen/fontgen.py
${py}/bin/python3 ./gen/logogen.py
'';
};
}
);
}

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gen/fontgen.py 100644
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import json
import struct
# generates:
# font_data.dat (binary file, expected to load at location 0xf000_0100)
# font_data.inc (fox32 assembly)
# font_data.inc defines constants
# N_CHARS: number of defined characters (u32)
# CHAR_TABLE: pointer to main char table (&Char)
# UNKNOWN_CHAR: pointer to unknown character (&Char)
#
# struct Char {
# width: u8, height: u8, baseline: u8,
# data_ptr: &[u8],
# } (7 bytes)
DATA_FILE_ORIGIN = 0xf000_0100
BASELINE = 7
N_CHARS = 127
codepoints = json.load(open("ultlf/codepoints.json"))
font_data = json.load(open("ultlf/data.json"))
baselines = json.load(open("ultlf/trimmed_baselines.json"))
UNKNOWN = [
"# ### #",
"# # # #",
"# # #",
"# # #",
"# # #",
"# #",
"# # #",
]
with open("xenrom/data/font_data.inc", "w") as inc, open("xenrom/data/font_data.dat", "wb") as dat:
table = b''
char_data = b''
for ch in [None] + list(range(N_CHARS)):
if ch in codepoints:
i = codepoints.index(ch)
glyph = font_data[i]
baseline = baselines[i]
if '?' in "".join(glyph):
print(f"Font doesn't have char {ch}")
glyph = UNKNOWN
baseline = 6
else:
glyph = UNKNOWN
baseline = 6
print(f"Couldn't find char {ch}")
table += struct.pack("BBBI", len(glyph[0]), len(glyph), baseline, DATA_FILE_ORIGIN + len(char_data))
for line in glyph:
for ch in glyph:
char_data += b'\x00' if ch == ' ' else b'\x01'
dat.write(char_data + table)
inc.write(f'''
const N_CHARS: {N_CHARS}
const CHAR_TABLE: {hex(DATA_FILE_ORIGIN + len(char_data))}
const UNKNOWN_CHAR: {hex(DATA_FILE_ORIGIN)}
''')

73
gen/logogen.py 100644
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import struct
import math
import random
random.seed(0)
LOGO = '''
BBBB BBBB BB B
B B B
BB BBBB B B
B B B
BBBB BBBB B BB
WWWW WWWW
W W
WWWW WWWW
W W
WWWW WWWW
'''[1:-1]
LOGO = '''
RRRR RRRR RR R BBBB BBBB
R R R B B
RR RRRR R R BBBB BBBB
R R R B B
RRRR RRRR R RR BBBB BBBB
WWWW WWWW
W W W
W W WWWW
W W W
WWWW WWWW
'''[1:-1]
LOGO = LOGO.split("\n")
print(LOGO)
width = max(len(row) for row in LOGO)
height = len(LOGO)
print("width =", width)
print("height =", height)
with open("xenrom/data/logo.dat", "wb") as data_out, open("xenrom/data/logo.inc", "w") as inc:
for y in range(height):
row = LOGO[y]
for x in range(width):
c = row[x] if x < len(row) else ' '
data_out.write(b'\x00' if c == ' ' else b'\x01' if c == 'B' else b'\x02' if c == 'W' else b'\x03')
inc.write(f"const LOGO_WIDTH: {hex(width)}\n")
inc.write(f"const LOGO_HEIGHT: {hex(height)}\n")
with open("xenrom/data/logo_cycle.dat", "wb") as data, open("xenrom/data/logo_cycle.inc", "w") as inc:
T = 60
N = T * 4
r = 0
for i in range(N):
if i < T or i > 3 * T:
f = 0.5 - (1/2 * math.cos((i/T) * math.pi))
elif i < 180:
f = 0.75 - (1/4 * math.cos((i/T) * math.pi))
if i == 3 * T - 10:
r = 1
if i == 3 * T:
r = 2
if i == 3 * T + 10:
r = 0
data.write(struct.pack("BB", min(255, int(256 * f)), r))
inc.write(f"const LOGO_LENGTH: {N}")

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gen/vergen.py 100644
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import os
with open("xenrom/data/version.inc", "w") as f:
version = os.getenv("NIX_SEMVER", "(unknown version)")
git_sha = os.getenv("NIX_GIT_SHA_SHORT", "(unknown git hash)")
f.write(f'version_str: data.str "{version}" data.8 0\n')
f.write(f'sha_str: data.str "{git_sha}" data.8 0\n')

183
xenrom/logo.asm 100644
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show_logo:
icl ; disable interrupts
; Save old interrupt handler
mov r0, [0x3fc]
push r0
; Set vsync interrupt handler to logo display
mov [0x3fc], intr_vsync_logo
mov [SHOWING_LOGO], 1
mov [FRAMENR], 0
ise ; Enable interrupts
; Wait for logo display interrupt to return
show_logo_wait:
cmp [SHOWING_LOGO], 1
ifz jmp show_logo_wait
icl ; Restore interrupt handler
pop r0
mov [0x3fc], r0
; Draw logo in black (clear)
mov r0, 0
mov r1, 0
call draw_logo
ret
cycle_data: #include_bin "data/logo_cycle.dat"
; defines LOGO_LENGTH
#include "data/logo_cycle.inc"
intr_vsync_logo:
; [rsp] = interrupt number
; [rsp+4] = flags
; [rsp+8] = previous instuction
inc [FRAMENR]
mov r2, [FRAMENR]
cmp r2, LOGO_LENGTH
ifgteq mov [SHOWING_LOGO], 0
; fetch brightness and glitchiness
mul r2, 2
add r2, cycle_data
movz.8 r0, [r2]
inc r2
movz.8 r1, [r2]
call draw_logo
add rsp, 4 ; pop interrupt number
reti
boot_logo: #include_bin "data/logo.dat"
; defines LOGO_WIDTH, LOGO_HEIGHT:
#include "data/logo.inc"
const LOGO_SCALE: 8 ; pixels per pixel in logo
; input: r0: 0-255 color multiplier
; input: r1: glitch effect
draw_logo:
mov r31, r0
mov r30, r1
; r0: x counter
; r1: y counter
; r2: pointer to current boot logo index
; r5: x on screen start
; r6: y on screen start
mov r5, SCREEN_WIDTH
mov r6, LOGO_WIDTH
mul r6, LOGO_SCALE
sub r5, r6
ror r5, 1
mov r6, SCREEN_HEIGHT
mov r7, LOGO_HEIGHT
mul r7, LOGO_SCALE
sub r6, r7
ror r6, 1
mov r2, boot_logo
mov r1, 0
draw_loop_y:
cmp r1, LOGO_HEIGHT
ifz jmp draw_logo_done
mov r0, 0
draw_loop_x:
cmp r0, LOGO_WIDTH
ifz jmp draw_loop_x_done
; r3: color to draw
mov r3, 0x00000000 ; black
xor r2, r30
cmp.8 [r2], 1
ifz mov r3, 0x00040401 ; blue
cmp.8 [r2], 2
ifz mov r3, 0x00040403; white
cmp.8 [r2], 3
ifz mov r3, 0x00010204; orange
xor r2, r30
cmp r30, 0
ifz jmp no_color_glitch
cmp r3, 0
ifnz xor r3, r0
ifnz xor r3, r1
no_color_glitch:
mov r28, r31
srl r28, 2
mul r3, r28 ; brightness
xor r3, r29
or r3, 0xff000000
; r4: screen buffer index of top left
mov r4, r6
mov r7, r1
mul r7, LOGO_SCALE
add r4, r7
mul r4, 640
add r4, r5
mov r7, r0
mul r7, LOGO_SCALE
add r4, r7
mul r4, 4
add r4, BG_FRAMEBUFFER
; r7: paint x
; r8: point y
mov r7, 0
draw_loop_px:
cmp r7, LOGO_SCALE
ifz jmp draw_loop_px_done
mov r8, 0
draw_loop_py:
cmp r8, LOGO_SCALE
ifz jmp draw_loop_py_done
mov r9, r8
mul r9, 640
add r9, r7
mul r9, 4
add r9, r4
mov [r9], r3
inc r8
jmp draw_loop_py
draw_loop_py_done:
inc r7
jmp draw_loop_px
draw_loop_px_done:
inc r2
inc r0
jmp draw_loop_x
draw_loop_x_done:
inc r1
jmp draw_loop_y
draw_logo_done:
ret

99
xenrom/main.asm 100644
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; Constants
const SYS_STACK_START: 0x03fffff0
const BG_FRAMEBUFFER: 0x2000000
const SCREEN_WIDTH: 640
const SCREEN_HEIGHT: 480
; Globals
const FRAMENR: 0x00000000
const SHOWING_LOGO: 0x00000004
org 0xf0000000
entry:
mcl ; disable MMU
mov rsp, SYS_STACK_START ; set stack pointer
mov r0, entry_str
call serial_print
mov r0, version_str_1
call serial_print
mov r0, version_str
call serial_print
mov r0, version_str_2
call serial_print
mov r0, sha_str
call serial_print
mov r0, version_str_3
call serial_print
call show_logo
mov r0, booting_str
call serial_print
halt
entry_str: data.str "== Welcome to Xen32OS" data.8 0
; defines version_str, sha_str
#include "data/version.inc"
version_str_1: data.str " - version " data.8 0
version_str_2: data.str " (" data.8 0
version_str_3: data.str ") ==" data.8 10 data.8 0
booting_str: data.str "booting..." data.8 10 data.8 0
; input:
; str: &str0 @ r0
; returns:
; nothing
; clobbers:
; r0
serial_print:
cmp.8 [r0], 0
ifz ret
out 0x00000000, [r0]
inc r0
jmp serial_print
; input:
; n: u64 @ r0
; returns
; nothing
; clobbers:
; r0
serial_print_num:
cmp r0, 0
ifz jmp serial_print_num_zero
call serial_print_num_nonzero
ret
serial_print_num_nonzero:
cmp r0, 0
ifz ret
push r0
div r0, 10
call serial_print_num_nonzero
pop r0
rem r0, 10
add r0, 48
out 0x00000000, r0
ret
serial_print_num_zero:
mov r0, serial_print_num_str_zero
jmp serial_print ; tail call
serial_print_num_str_zero: data.str "0" data.8 0
serial_print_nl:
out 0x00000000, 10
ret
#include "logo.asm"

1
xenrom/text.asm 100644
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