From 2ce0f8af51dae9e7d591ff5fd038f89d6ca9dbbe Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.org>
Date: Sat, 24 Feb 2024 14:44:38 -0600
Subject: arch: i386: cleanup everything and reorganize

Clean up everything in the i386 arch directory. This code has been in
dire need of refactoring for a long while. All the inline assembly
functions and the data structures related to the architecture should be
placed into their own header file. Now the scheduler can access
registers and ISRs without having to deal with arch-specific code.

Signed-off-by: Danny Holman <dholman@gymli.org>
---
 arch/i386/include/kernel/asm.h | 84 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

(limited to 'arch/i386/include/kernel/asm.h')

diff --git a/arch/i386/include/kernel/asm.h b/arch/i386/include/kernel/asm.h
index 33ec3d7..615da74 100644
--- a/arch/i386/include/kernel/asm.h
+++ b/arch/i386/include/kernel/asm.h
@@ -1,6 +1,90 @@
 #ifndef I386_ASM_H
 #define I386_ASM_H
 
+#include <stdint.h>
+
+struct regs {
+        uint32_t cr4;
+        uint32_t cr3;
+        uint32_t cr2;
+        uint32_t cr0;
+
+        uint32_t edi;
+        uint32_t esi;
+        uint32_t edx;
+        uint32_t ecx;
+        uint32_t ebx;
+        uint32_t eax;
+
+        uint32_t isr_vector;
+        uint32_t isr_err;
+        uint32_t eip;
+        uint32_t cs;
+        uint32_t eflags;
+} __attribute__((packed));
+
+void isr_stub_0(void);
+void isr_stub_1(void);
+void isr_stub_2(void);
+void isr_stub_3(void);
+void isr_stub_4(void);
+void isr_stub_5(void);
+void isr_stub_6(void);
+void isr_stub_7(void);
+void isr_stub_8(void);
+void isr_stub_9(void);
+void isr_stub_10(void);
+void isr_stub_11(void);
+void isr_stub_12(void);
+void isr_stub_13(void);
+void isr_stub_14(void);
+void isr_stub_15(void);
+void isr_stub_16(void);
+void isr_stub_17(void);
+void isr_stub_18(void);
+void isr_stub_19(void);
+void isr_stub_20(void);
+void isr_stub_21(void);
+void isr_stub_22(void);
+void isr_stub_23(void);
+void isr_stub_24(void);
+void isr_stub_25(void);
+void isr_stub_26(void);
+void isr_stub_27(void);
+void isr_stub_28(void);
+void isr_stub_29(void);
+void isr_stub_30(void);
+void isr_stub_31(void);
+
+void irq_stub_0(void);
+void irq_stub_1(void);
+void irq_stub_2(void);
+void irq_stub_3(void);
+void irq_stub_4(void);
+void irq_stub_5(void);
+void irq_stub_6(void);
+void irq_stub_7(void);
+void irq_stub_8(void);
+void irq_stub_9(void);
+void irq_stub_10(void);
+void irq_stub_11(void);
+void irq_stub_12(void);
+void irq_stub_13(void);
+void irq_stub_14(void);
+void irq_stub_15(void);
+
+void syscall_stub(void);
+
+static inline void outb(uint16_t port, uint8_t value) {
+        __asm__ volatile("outb %0, %1" : : "a"(value), "Nd"(port));
+}
+
+static inline uint8_t inb(uint16_t port) {
+        uint8_t ret;
+        __asm__ volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
+        return ret;
+}
+
 static inline void enable_ints(void) {
         __asm__ volatile("sti");
         return;
-- 
cgit v1.2.3