aarch64/fb: add 8x16 font

kernel/src/arch/aarch64/board/raspi3/fb.rs

@@ -198,6 +198,6 @@ pub fn init() {
             info!("framebuffer: init end\n{:#x?}", fb);
             *FRAME_BUFFER.lock() = Some(fb);
         }
-        Err(err) => error!("framebuffer init failed: {}", err),
+        Err(err) => warn!("framebuffer init failed: {}", err),
     }
 }

kernel/src/arch/aarch64/driver/console.rs

@@ -1,9 +1,12 @@
 //! Framebuffer console display driver for ARM64
 
-use super::board::fb::{FramebufferInfo, FRAME_BUFFER};
+use super::fb::{FramebufferInfo, FRAME_BUFFER};
+use super::fonts::{Font, Font8x16};
 use alloc::vec::Vec;
-use core::fmt::{self, Write};
+use core::fmt;
+use core::marker::PhantomData;
 use lazy_static::lazy_static;
+use log::*;
 use spin::Mutex;
 
 #[derive(Debug, Clone, Copy)]
@@ -25,41 +28,35 @@ impl Default for ConsoleChar {
     }
 }
 
-const CHAR_WIDTH: u16 = 8;
-const CHAR_HEIGHT: u16 = 16;
-
 /// Character buffer
-struct ConsoleBuffer {
-    num_row: u16,
-    num_col: u16,
+struct ConsoleBuffer<F: Font> {
+    num_row: usize,
+    num_col: usize,
     buf: Vec<Vec<ConsoleChar>>,
+    font: PhantomData<F>,
 }
 
-impl ConsoleBuffer {
-    fn new(num_row: u16, num_col: u16) -> ConsoleBuffer {
+impl<F: Font> ConsoleBuffer<F> {
+    fn new(num_row: usize, num_col: usize) -> ConsoleBuffer<F> {
         ConsoleBuffer {
             num_row,
             num_col,
-            buf: vec![vec![ConsoleChar::default(); num_col as usize]; num_row as usize],
+            buf: vec![vec![ConsoleChar::default(); num_col]; num_row],
+            font: PhantomData,
         }
     }
 
-    /// Read one character at `(row, col)`.
-    fn read(&self, row: u16, col: u16) -> ConsoleChar {
-        self.buf[row as usize][col as usize]
-    }
-
     /// Write one character at `(row, col)`.
-    /// TODO: font & color
-    fn write(&mut self, row: u16, col: u16, ch: ConsoleChar) {
-        self.buf[row as usize][col as usize] = ch;
+    /// TODO: color
+    fn write(&mut self, row: usize, col: usize, ch: ConsoleChar) {
+        self.buf[row][col] = ch;
 
-        let off_x = col * CHAR_WIDTH;
-        let off_y = row * CHAR_HEIGHT;
+        let off_x = col * F::WIDTH;
+        let off_y = row * F::HEIGHT;
         if let Some(fb) = FRAME_BUFFER.lock().as_mut() {
-            for y in 0..CHAR_HEIGHT {
-                for x in 0..CHAR_WIDTH {
-                    let pixel = if ch.color.0 == 0 { 0 } else { !0 };
+            for y in 0..F::HEIGHT {
+                for x in 0..F::WIDTH {
+                    let pixel = if ch.color.0 != 0 && F::get(ch.ascii_char, x, y) { !0 } else { 0 };
                     fb.write((off_x + x) as u32, (off_y + y) as u32, pixel);
                 }
             }
@@ -67,7 +64,7 @@ impl ConsoleBuffer {
     }
 
     /// Delete one character at `(row, col)`.
-    fn delete(&mut self, row: u16, col: u16) {
+    fn delete(&mut self, row: usize, col: usize) {
         self.write(row, col, ConsoleChar::default());
     }
 
@@ -76,7 +73,7 @@ impl ConsoleBuffer {
     fn new_line(&mut self) {
         for i in 1..self.num_row {
             for j in 0..self.num_col {
-                self.write(i - 1, j, self.read(i, j));
+                self.write(i - 1, j, self.buf[i][j]);
             }
         }
         for j in 0..self.num_col {
@@ -86,8 +83,8 @@ impl ConsoleBuffer {
 
     /// Clear the entire buffer and screen.
     fn clear(&mut self) {
-        for i in 0..self.num_row as usize {
-            for j in 0..self.num_col as usize {
+        for i in 0..self.num_row {
+            for j in 0..self.num_col {
                 self.buf[i][j] = ConsoleChar::default()
             }
         }
@@ -98,38 +95,32 @@ impl ConsoleBuffer {
 }
 
 /// Console structure
-pub struct Console {
+pub struct Console<F: Font> {
     /// current color
     color: Color,
     /// cursor row
-    row: u16,
+    row: usize,
     /// cursor column
-    col: u16,
-    /// number of rows
-    num_row: u16,
-    /// number of columns
-    num_col: u16,
+    col: usize,
     /// character buffer
-    buf: ConsoleBuffer,
+    buf: ConsoleBuffer<F>,
 }
 
-impl Console {
-    fn new(fb: &FramebufferInfo) -> Console {
-        let num_row = fb.yres as u16 / CHAR_HEIGHT;
-        let num_col = fb.xres as u16 / CHAR_WIDTH;
+impl<F: Font> Console<F> {
+    fn new(fb: &FramebufferInfo) -> Console<F> {
+        let num_row = fb.yres as usize / F::HEIGHT;
+        let num_col = fb.xres as usize / F::WIDTH;
         Console {
             color: Color(1),
             row: 0,
             col: 0,
-            num_row,
-            num_col,
             buf: ConsoleBuffer::new(num_row, num_col),
         }
     }
 
     fn new_line(&mut self) {
         self.col = 0;
-        if self.row < self.num_row - 1 {
+        if self.row < self.buf.num_row - 1 {
             self.row += 1;
         } else {
             self.buf.new_line();
@@ -144,14 +135,14 @@ impl Console {
                     self.buf.delete(self.row, self.col);
                 } else if self.row > 0 {
                     self.row -= 1;
-                    self.col = self.num_col - 1;
+                    self.col = self.buf.num_col - 1;
                     self.buf.delete(self.row, self.col);
                 }
             }
             b'\n' => self.new_line(),
             b'\r' => self.col = 0,
             byte => {
-                if self.col >= self.num_col {
+                if self.col >= self.buf.num_col {
                     self.new_line();
                 }
 
@@ -173,7 +164,7 @@ impl Console {
     }
 }
 
-impl fmt::Write for Console {
+impl<F: Font> fmt::Write for Console<F> {
     fn write_str(&mut self, s: &str) -> fmt::Result {
         for byte in s.bytes() {
             self.write_byte(byte)
@@ -183,7 +174,7 @@ impl fmt::Write for Console {
 }
 
 lazy_static! {
-    pub static ref CONSOLE: Mutex<Option<Console>> = Mutex::new(None);
+    pub static ref CONSOLE: Mutex<Option<Console<Font8x16>>> = Mutex::new(None);
 }
 
 /// Initialize console driver
@@ -192,7 +183,9 @@ pub fn init() {
         *CONSOLE.lock() = Some(Console::new(&fb.fb_info));
     }
 
-    if let Some(console) = CONSOLE.lock().as_mut() {
-        console.write_str("Hello Raspberry Pi!\n").unwrap();
+    if !CONSOLE.lock().is_none() {
+        info!("console: init end");
+    } else {
+        warn!("console: init failed");
     }
 }

kernel/src/arch/aarch64/driver/fonts/mod.rs

@@ -0,0 +1,12 @@
+//! Console font
+
+mod font8x16;
+
+pub use self::font8x16::Font8x16;
+
+pub trait Font {
+    const HEIGHT: usize;
+    const WIDTH: usize;
+
+    fn get(byte: u8, x: usize, y: usize) -> bool;
+}

kernel/src/arch/aarch64/driver/mod.rs

@@ -3,6 +3,10 @@
 use super::board;
 use once::*;
 
+pub use self::board::fb;
+pub use self::board::serial;
+
+pub mod fonts;
 pub mod console;
 
 /// Initialize ARM64 common drivers

kernel/src/arch/aarch64/io.rs

@@ -1,6 +1,6 @@
 //! Serial driver for aarch64.
 
-use super::board::serial::*;
+use super::driver::serial::*;
 use super::driver::console::CONSOLE;
 use core::fmt::{Arguments, Write};