feat: Initial PMM implementation

Introduce the foundational Physical Memory Manager (PMM) and restructure the project for modularity.
Implemented basic PMM and related memory management headers (mm/pmm.h, mm/vm.h).
Updated Makefile and build process to support new modular structure.

1 files changed, 39 insertions, 0 deletions

diff --git a/link.ld b/link.ld
new file mode 100644
index 0000000..239d244
--- /dev/null
+++ b/link.ld
@@ -0,0 +1,39 @@
+OUTPUT_ARCH( "riscv" )
+ENTRY(_start)
+
+SECTIONS
+{
+    . = 0x80000000;
+
+    .text : {
+        PROVIDE(text_start = .);
+        *(.text.entry)
+        *(.text .text.*)
+        . = ALIGN(4096);
+        PROVIDE(text_end = .);
+    }
+
+    .rodata : {
+        PROVIDE(rodata_start = .);
+        *(.rodata .rodata.*)
+        . = ALIGN(4096);
+        PROVIDE(rodata_end = .);
+    }
+
+    .data : {
+        PROVIDE(data_start = .);
+        *(.data .data.*)
+        . = ALIGN(4096);
+        PROVIDE(data_end = .);
+    }
+
+    .bss : {
+        PROVIDE(bss_start = .);
+        *(.bss .bss.*)
+        *(.sbss .sbss.*)
+        . = ALIGN(4096);
+        PROVIDE(bss_end = .);
+    }
+
+    PROVIDE(kernel_end = .);
+}
\ No newline at end of file