initial commit

4 files changed, 81 insertions, 0 deletions

diff --git a/arch/x86_64/arch.c b/arch/x86_64/arch.c
new file mode 100644
index 0000000..68f59fe
--- /dev/null
+++ b/arch/x86_64/arch.c
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org>
+ * 
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <garmos/arch.h>
+#include <garmos/types.h>
+
+void regset8(const uint32_t reg, const uint8_t val)
+{
+	volatile uint8_t *p = (volatile uint8_t *) reg;
+	*p = val;
+}
diff --git a/arch/x86_64/config.mk b/arch/x86_64/config.mk
new file mode 100644
index 0000000..ecbef44
--- /dev/null
+++ b/arch/x86_64/config.mk
@@ -0,0 +1,2 @@
+CPPFLAGS += -DCHAR_IS_INT8 -DSHORT_IS_INT16 -DINT_IS_INT32
+CPPFLAGS += -DENABLE_VGA
diff --git a/arch/x86_64/loader.s b/arch/x86_64/loader.s
new file mode 100644
index 0000000..b283a64
--- /dev/null
+++ b/arch/x86_64/loader.s
@@ -0,0 +1,27 @@
+.set MAGIC, 0x1badb002
+.set FLAGS, (1<<0 | 1<<1)
+.set CHECKSUM, -(MAGIC + FLAGS)
+
+.section .multiboot
+	.long MAGIC
+	.long FLAGS
+	.long CHECKSUM
+
+.section .text
+.extern kernel_main
+.global loader
+
+loader:
+	mov $kernel_stack, %esp
+	push %eax
+	push %ebx
+	call kernel_main
+
+_stop:
+	cli
+	hlt
+	jmp _stop
+
+.section .bss
+.space 2*1024*1024  # 2 MiB
+kernel_stack:
diff --git a/arch/x86_64/memmap b/arch/x86_64/memmap
new file mode 100644
index 0000000..78bdf9b
--- /dev/null
+++ b/arch/x86_64/memmap
@@ -0,0 +1,30 @@
+ENTRY(loader)
+OUTPUT_ARCH(i386:i386)
+OUTPUT_FORMAT(elf32-i386)
+
+SECTIONS
+{
+	. = 0x0100000;
+
+	.text :
+	{
+		*(.multiboot)
+		*(.text*)
+		*(.rodata)
+	}
+
+	.data :
+	{
+		start_ctors = .;
+		KEEP(*(.init_array));
+		KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*)));
+		end_ctors = .;
+	}
+
+	.bss :
+	{
+		*(.bss)
+	}
+
+	/DISCARD/ : { *(.fini_array*) *(.comment) }
+}