From ef805e9373fd946bf1fe667bf18a54dfed6d1045 Mon Sep 17 00:00:00 2001
From: Alejandro Sior <aho@sior.be>
Date: Sat, 23 Jul 2022 22:53:47 +0200
Subject: kernel: add basic modules: arch, mem, rt

---
 arch/amd64/README                |  4 ++++
 arch/amd64/include/arch_stdint.h | 29 +++++++++++++++++++++++++++++
 arch/amd64/linker.sc             | 34 ++++++++++++++++++++++++++++++++++
 arch/amd64/meson.build           | 13 +++++++++++++
 arch/amd64/quirks.c              |  7 +++++++
 5 files changed, 87 insertions(+)
 create mode 100644 arch/amd64/README
 create mode 100644 arch/amd64/include/arch_stdint.h
 create mode 100644 arch/amd64/linker.sc
 create mode 100644 arch/amd64/meson.build
 create mode 100644 arch/amd64/quirks.c

(limited to 'arch/amd64')

diff --git a/arch/amd64/README b/arch/amd64/README
new file mode 100644
index 0000000..1051958
--- /dev/null
+++ b/arch/amd64/README
@@ -0,0 +1,4 @@
+The [arch/amd64] module defines implementations and definitions
+pertaining to the amd64 (x86_64) architecture, as well as the
+entry point setting up the environment before jumping to the
+common abstracted code.
\ No newline at end of file
diff --git a/arch/amd64/include/arch_stdint.h b/arch/amd64/include/arch_stdint.h
new file mode 100644
index 0000000..06040e2
--- /dev/null
+++ b/arch/amd64/include/arch_stdint.h
@@ -0,0 +1,29 @@
+#ifndef AMD64_STDINT_H
+#define AMD64_STDINT_H
+
+#include <assert.h>
+
+typedef unsigned char u8;
+typedef char i8;
+
+typedef unsigned short int u16;
+typedef short int i16;
+static_assert(sizeof(u16) == 2, "u16 is 2 bytes");
+static_assert(sizeof(i16) == 2, "i16 is 2 bytes");
+
+typedef unsigned int u32;
+typedef int i32;
+static_assert(sizeof(u32) == 4, "u16 is 4 bytes");
+static_assert(sizeof(i32) == 4, "i16 is 4 bytes");
+
+typedef unsigned long long int u64;
+typedef long long int i64;
+static_assert(sizeof(u64) == 8, "u64 is 8 bytes");
+static_assert(sizeof(i64) == 8, "i64 is 8 bytes");
+
+typedef unsigned long long int usize;
+typedef long long int isize;
+static_assert(sizeof(usize) == 8, "usize is 8 bytes");
+static_assert(sizeof(isize) == 8, "isize is 8 bytes");
+
+#endif
\ No newline at end of file
diff --git a/arch/amd64/linker.sc b/arch/amd64/linker.sc
new file mode 100644
index 0000000..16d9330
--- /dev/null
+++ b/arch/amd64/linker.sc
@@ -0,0 +1,34 @@
+OUTPUT(elf64-x86-64)
+ENTRY(amd64_quirks)
+
+SECTIONS {
+	. = 0xffffffff80000000;
+
+	.stack (NOLOAD) : {
+		. = ALIGN(8);
+		. += 0x10000;
+		. = ALIGN(8);
+		kernel_stack_high = .;
+	} :stack
+
+	kernel_begin = .;
+	.text : {
+		KEEP(*(.text .text.*))
+	} :text
+
+	. += CONSTANT(MAXPAGESIZE);
+
+	.rodata : {
+		KEEP(*(.rodata .rodata.*))
+	} :rodata
+
+	.data : {
+		KEEP(*(.data .data.*))
+	} :data
+
+	.bss (NOLOAD) : {
+		KEEP(*(COMMON))
+		KEEP(*(.bss .bss.*))
+	} :data
+	kernel_end = .;
+}
\ No newline at end of file
diff --git a/arch/amd64/meson.build b/arch/amd64/meson.build
new file mode 100644
index 0000000..4c64c8c
--- /dev/null
+++ b/arch/amd64/meson.build
@@ -0,0 +1,13 @@
+amd64_src = [
+	'quirks.c'
+]
+
+amd64_linker_sc = meson.current_source_dir() / 'linker.sc'
+
+kernel_link_dep += amd64_linker_sc
+kernel_link_arg += '-T' + amd64_linker_sc
+kernel_inc += include_directories('include')
+
+amd64 = static_library('amd64', amd64_src, include_directories: kernel_inc)
+
+kernel_mod += amd64
\ No newline at end of file
diff --git a/arch/amd64/quirks.c b/arch/amd64/quirks.c
new file mode 100644
index 0000000..549f605
--- /dev/null
+++ b/arch/amd64/quirks.c
@@ -0,0 +1,7 @@
+#include <third/boot/bp.h>
+
+int boot();
+
+int amd64_quirks(BpBootinfo *info) {
+	return boot();
+}
\ No newline at end of file
-- 
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