From 2bc12cb4691cb4e3167c3a9ac9c2bbe08461ce27 Mon Sep 17 00:00:00 2001
From: mii443 <mii@sfc.wide.ad.jp>
Date: Wed, 2 Jul 2025 01:17:28 +0900
Subject: [PATCH] add common

---
 .gitignore                   |  1 +
 nel_os_bootloader/Cargo.lock |  5 +++++
 nel_os_bootloader/Cargo.toml |  1 +
 nel_os_common/Cargo.lock     |  7 +++++++
 nel_os_common/Cargo.toml     |  6 ++++++
 nel_os_common/src/lib.rs     |  3 +++
 nel_os_common/src/memory.rs  | 17 +++++++++++++++++
 7 files changed, 40 insertions(+)
 create mode 100644 nel_os_common/Cargo.lock
 create mode 100644 nel_os_common/Cargo.toml
 create mode 100644 nel_os_common/src/lib.rs
 create mode 100644 nel_os_common/src/memory.rs

diff --git a/.gitignore b/.gitignore
index baf9102..a465cbc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 nel_os_bootloader/target
 nel_os_kernel/target
+nel_os_common/target
 nel_os_bootloader/fat.img
 nel_os_bootloader/iso/
 nel_os_bootloader/nel_os.iso
diff --git a/nel_os_bootloader/Cargo.lock b/nel_os_bootloader/Cargo.lock
index 310800a..aa16df7 100644
--- a/nel_os_bootloader/Cargo.lock
+++ b/nel_os_bootloader/Cargo.lock
@@ -49,10 +49,15 @@ version = "0.1.0"
 dependencies = [
  "goblin",
  "log",
+ "nel_os_common",
  "uefi",
  "x86",
 ]
 
+[[package]]
+name = "nel_os_common"
+version = "0.1.0"
+
 [[package]]
 name = "plain"
 version = "0.2.3"
diff --git a/nel_os_bootloader/Cargo.toml b/nel_os_bootloader/Cargo.toml
index d42dfbb..1b16374 100644
--- a/nel_os_bootloader/Cargo.toml
+++ b/nel_os_bootloader/Cargo.toml
@@ -8,3 +8,4 @@ goblin = { version = "0.10.0", features = ["elf32", "elf64", "endian_fd"], defau
 log = "0.4.27"
 uefi = { version = "0.35.0", features = ["logger", "panic_handler", "alloc"] }
 x86 = "0.52.0"
+nel_os_common = { path = "../nel_os_common" }
diff --git a/nel_os_common/Cargo.lock b/nel_os_common/Cargo.lock
new file mode 100644
index 0000000..a5dab31
--- /dev/null
+++ b/nel_os_common/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "nel_os_common"
+version = "0.1.0"
diff --git a/nel_os_common/Cargo.toml b/nel_os_common/Cargo.toml
new file mode 100644
index 0000000..e9ef893
--- /dev/null
+++ b/nel_os_common/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "nel_os_common"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/nel_os_common/src/lib.rs b/nel_os_common/src/lib.rs
new file mode 100644
index 0000000..581804b
--- /dev/null
+++ b/nel_os_common/src/lib.rs
@@ -0,0 +1,3 @@
+#![no_std]
+
+pub mod memory;
diff --git a/nel_os_common/src/memory.rs b/nel_os_common/src/memory.rs
new file mode 100644
index 0000000..5eebc76
--- /dev/null
+++ b/nel_os_common/src/memory.rs
@@ -0,0 +1,17 @@
+#[repr(C)]
+pub struct UsableMemory {
+    pub ranges: *const Range,
+    pub len: u64,
+}
+
+#[repr(C)]
+pub struct Range {
+    pub start: u64,
+    pub end: u64,
+}
+
+impl UsableMemory {
+    pub fn ranges(&self) -> &[Range] {
+        unsafe { core::slice::from_raw_parts(self.ranges, self.len as usize) }
+    }
+}