From 5064ec05b2af9e17aa1753575bef457a284ad61d Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.xyz>
Date: Sun, 17 Jan 2021 20:16:00 -0600
Subject: arch: i386: add support for x86 processors

Add support for 32-bit x86 processors, i.e. the 80386 and above.

Signed-off-by: Danny Holman <dholman@gymli.xyz>
---
 arch/i386/boot.s | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 arch/i386/boot.s

(limited to 'arch/i386/boot.s')

diff --git a/arch/i386/boot.s b/arch/i386/boot.s
new file mode 100644
index 0000000..56ac227
--- /dev/null
+++ b/arch/i386/boot.s
@@ -0,0 +1,32 @@
+.set ALIGN,     1<<0
+.set MEMINFO,   1<<1
+.set FLAGS,     ALIGN | MEMINFO
+.set MAGIC,     0x1BADB002
+.set CHECKSUM,  -(MAGIC + FLAGS)
+
+.section .multiboot
+.align 4
+.long MAGIC
+.long FLAGS
+.long CHECKSUM
+
+.section .bss
+.align 16
+stack_bottom:
+.skip 16384
+stack_top:
+
+.section .text
+.global _start
+.type _start, @function
+
+_start:
+        movl $stack_top, %esp
+
+        call _init
+        call kernel_main
+
+        cli
+1:      hlt
+        jmp 1b
+.size _start, . - _start
-- 
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