From e8ea9ebcc0d6201f3e7770ffdd0a223bed7f57ec Mon Sep 17 00:00:00 2001
From: Tom-on64 <kubecekt@gmail.com>
Date: Sat, 9 Mar 2024 15:46:20 +0100
Subject: [PATCH] Added utility functions in system.h

---
 src/kernel/entry.asm    |   6 ++++++
 src/kernel/idt.c        |   2 ++
 src/kernel/idt.h        |   1 +
 src/kernel/main_c.swp   | Bin 0 -> 12288 bytes
 src/kernel/screen_c.swp | Bin 0 -> 12288 bytes
 src/kernel/screen_h.swp | Bin 0 -> 12288 bytes
 src/kernel/system.c     |  24 ++++++++++++++++++++++++
 src/kernel/system.h     |  15 +++++++++++++++
 8 files changed, 48 insertions(+)
 create mode 100644 src/kernel/main_c.swp
 create mode 100644 src/kernel/screen_c.swp
 create mode 100644 src/kernel/screen_h.swp

diff --git a/src/kernel/entry.asm b/src/kernel/entry.asm
index 737e646..46e2283 100644
--- a/src/kernel/entry.asm
+++ b/src/kernel/entry.asm
@@ -2,8 +2,14 @@
 [global _start]
 
 [extern main]
+[extern idtp]
 
 _start:
     call main
     cli
     hlt
+
+[global idtLoad]
+idtLoad:
+    lidt [idtp]
+    ret
diff --git a/src/kernel/idt.c b/src/kernel/idt.c
index 9e78727..b1aa4d9 100644
--- a/src/kernel/idt.c
+++ b/src/kernel/idt.c
@@ -28,5 +28,7 @@ void idtSetGate(uint8_t i, uint32_t offset, uint16_t selector, uint8_t typeAttr)
 void setupIdt() {
     idtp.limit = sizeof(struct idtEntry) * 256;
     idtp.base = (uint32_t)&idt;
+
+    idtLoad();
 }
 
diff --git a/src/kernel/idt.h b/src/kernel/idt.h
index 89e7e97..bc394c6 100644
--- a/src/kernel/idt.h
+++ b/src/kernel/idt.h
@@ -5,6 +5,7 @@
 
 void setupIdt();
 void idtSetGate(uint8_t i, uint32_t offset, uint16_t selector, uint8_t typeAttr);
+extern void idtLoad();
 
 #endif
 
diff --git a/src/kernel/main_c.swp b/src/kernel/main_c.swp
new file mode 100644
index 0000000000000000000000000000000000000000..745ad5a631893f2d9bc40c57d27158186c2c8f00
GIT binary patch
literal 12288
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am=N`~NwOwY!qce@#@>&CI;oU0ZtNROY(wq<

literal 0
HcmV?d00001

diff --git a/src/kernel/screen_c.swp b/src/kernel/screen_c.swp
new file mode 100644
index 0000000000000000000000000000000000000000..90291f2a9ceb8e1ce1d034e225de7da28149e265
GIT binary patch
literal 12288
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literal 0
HcmV?d00001

diff --git a/src/kernel/screen_h.swp b/src/kernel/screen_h.swp
new file mode 100644
index 0000000000000000000000000000000000000000..89946c77d29d8ac7bdf037f58a9b2b8565752cc5
GIT binary patch
literal 12288
zcmeI&%SyvQ6b9f^!G#M^bT4DGQPCtSV#Q^x*hO4;$yRcim|&WeWKz1(?(|W75`7DO
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literal 0
HcmV?d00001

diff --git a/src/kernel/system.c b/src/kernel/system.c
index 43c43e3..78e1f69 100644
--- a/src/kernel/system.c
+++ b/src/kernel/system.c
@@ -1,3 +1,27 @@
 #include "system.h"
+#include "stdint.h"
 
+uint8_t inb(uint16_t port) {
+    uint8_t result;
+    asm volatile("in %1, %0" : "=a"(result) : "Nd"(port));
+    return result;
+}
+
+void outb(uint16_t port, uint8_t data) {
+    asm volatile("out %0, %1" :: "a"(data), "Nd"(port));
+}
+
+char* memcopy(char* src, char* dst, uint16_t length) {
+    for (int i = 0; i < length; i++) {
+        *(dst + i) = *(src + i);
+    }
+    return dst;
+}
+
+char* memset(char* dst, char value, uint16_t length) {
+    for (int i = 0; i < length; i++) {
+        *(dst + i) = value;
+    }
+    return dst;
+}
 
diff --git a/src/kernel/system.h b/src/kernel/system.h
index 1305e5b..c0311f8 100644
--- a/src/kernel/system.h
+++ b/src/kernel/system.h
@@ -1,6 +1,21 @@
 #ifndef SYSTEM_H
 #define SYSTEM_H
 
+#include "stdint.h"
 
+// Port functions
+uint8_t inb(uint16_t port);
+void outb(uint16_t port, uint8_t data);
+
+// Memory functions
+char* memcopy(char* src, char* dst, uint16_t length);
+char* memset(char* dst, char data, uint16_t length);
+
+struct regs {
+    unsigned int gs, fs, es, ds;
+    unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;
+    unsigned int intNo, errCode;
+    unsigned int eip, cs, eflags, useresp, ss;
+};
 
 #endif