From c7aa4d882ff6b1eb1e3c19bdfd772057817ff10c Mon Sep 17 00:00:00 2001
From: ian <ian>
Date: Sat, 8 Jul 2023 00:02:21 +0000
Subject: kernel/amd64: Abstract architecture specifics

git-svn-id: https://svn.vegaa.systems/svn/vega-Vega/trunk@9 a8a8aea2-181d-ee11-89e8-15fd0e089fc4
---
 sys/arch/amd64/machdep.c  |  2 +-
 sys/include/sys/machdep.h | 28 +++++++++++++++++++++++++++-
 sys/kern/init_main.c      |  3 +--
 3 files changed, 29 insertions(+), 4 deletions(-)

(limited to 'sys')

diff --git a/sys/arch/amd64/machdep.c b/sys/arch/amd64/machdep.c
index dd2cdc7..747d23a 100644
--- a/sys/arch/amd64/machdep.c
+++ b/sys/arch/amd64/machdep.c
@@ -63,6 +63,6 @@ processor_halt(void)
 __weak void
 processor_init(struct processor *processor)
 {
-    gdt_load(processor->gdtr);
+    gdt_load(processor->machdep.gdtr);
     interrupts_init(processor);
 }
diff --git a/sys/include/sys/machdep.h b/sys/include/sys/machdep.h
index 5f2112c..f98b123 100644
--- a/sys/include/sys/machdep.h
+++ b/sys/include/sys/machdep.h
@@ -39,9 +39,35 @@
 
 #if defined(_KERNEL)
 
-struct processor {
+/*
+ * Arch specifics go here
+ * along with an #if defined(...)
+ *
+ * XXX: When porting more architectures this
+ *      may get messy. Figure out a way to
+ *      seperate this into a different header.
+ */
+struct processor_machdep {
+#if defined(__x86_64__)
     struct gdtr      *gdtr;
     struct gdt_entry *gdt;
+#endif      /* defined(__x86_64__) */
+};
+
+/*
+ * Sets arch specifics to their
+ * defaults.
+ */
+#if defined(__x86_64__)
+#define DEFAULT_PROCESSOR_MACHDEP           \
+            {                               \
+                .gdtr = &g_early_gdtr,      \
+                .gdt  = &g_dmmy_gdt[0]      \
+            }
+#endif      /* defined(__x86_64__) */
+
+struct processor {
+    struct processor_machdep machdep;
 };
 
 __weak void processor_init(struct processor *processor);
diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 2ae2a09..f4db156 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -40,8 +40,7 @@ __KERNEL_META("$Vega$: init_main.c, Ian Marco Moffett, "
               "Where the Vega kernel first starts up");
 
 static struct processor bsp = {
-    .gdtr = &g_early_gdtr,
-    .gdt  = &g_dmmy_gdt[0]
+    .machdep = DEFAULT_PROCESSOR_MACHDEP
 };
 
 void
-- 
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