Add conditional compilation for mipsel, fix heap size for thinpad

Signed-off-by: Harry Chen <i@harrychen.xyz>

.gitignore

@@ -1,6 +1,7 @@
 build
 target
 /kernel/src/arch/x86_64/interrupt/vector.asm
+/kernel/src/arch/mipsel/boot/linker.ld
 *.gen.s
 *.dtb
 

kernel/Makefile

@@ -348,6 +348,7 @@ else ifeq ($(arch), mipsel)
 	@for file in context entry trap ; do \
 	    $(hostcc) -Dboard_$(board) -E src/arch/$(arch)/boot/$${file}.S -o src/arch/$(arch)/boot/$${file}.gen.s ; \
 	done
+	$(hostcc) -Dboard_$(board) -E src/arch/$(arch)/boot/linker.ld.S -o src/arch/$(arch)/boot/linker.ld
 	@cargo xbuild $(build_args)
 endif
 

kernel/src/arch/mipsel/board/thinpad/consts.rs

@@ -1,3 +1,3 @@
 /// board specific constants
 pub const MEMORY_END: usize = 0x8080_0000;
-pub const KERNEL_HEAP_SIZE: usize = 0x0044_0000;
+pub const KERNEL_HEAP_SIZE: usize = 0x0038_0000;

kernel/src/arch/mipsel/boot/linker.ld.S

@@ -4,7 +4,11 @@
 OUTPUT_ARCH(riscv)
 ENTRY(_start)
 
+#ifdef board_thinpad
+BASE_ADDRESS = 0x80000000;
+#else
 BASE_ADDRESS = 0x80100000;
+#endif
 
 SECTIONS
 {

kernel/src/arch/mipsel/consts.rs

@@ -2,11 +2,16 @@
 ///
 pub use super::board::consts::*;
 
-pub const MEMORY_OFFSET: usize = 0x80000000;
-pub const KERNEL_OFFSET: usize = 0x80100000;
-pub const PHYSICAL_MEMORY_OFFSET: usize = 0x80000000;
+pub const MEMORY_OFFSET: usize = 0x8000_0000;
 
-pub const USER_STACK_OFFSET: usize = 0x70000000 - USER_STACK_SIZE;
+#[cfg(feature = "board_thinpad")]
+pub const KERNEL_OFFSET: usize = 0x8000_0000;
+#[cfg(feature = "board_malta")]
+pub const KERNEL_OFFSET: usize = 0x8010_0000;
+
+pub const PHYSICAL_MEMORY_OFFSET: usize = 0x8000_0000;
+
+pub const USER_STACK_OFFSET: usize = 0x7000_0000 - USER_STACK_SIZE;
 pub const USER_STACK_SIZE: usize = 0x10000;
 
 pub const MAX_DTB_SIZE: usize = 0x2000;

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

@@ -10,7 +10,7 @@ pub mod console;
 /// Initialize common drivers
 pub fn init() {
     board::init_driver();
-    // console::init();
+    console::init();
     if let Some(con) = console::CONSOLE.lock().as_mut() {
         con.clear();
     }