From d00bd3d0fcafa0a36225ce55dd31b03b619570eb Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Sun, 20 Apr 2025 21:42:28 -0400
Subject: dont use in[s] instructions or rep in c

---
 kernel/include/comus/asm.h | 39 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 34 insertions(+), 5 deletions(-)

(limited to 'kernel/include')

diff --git a/kernel/include/comus/asm.h b/kernel/include/comus/asm.h
index 08b61e2..c7597e7 100644
--- a/kernel/include/comus/asm.h
+++ b/kernel/include/comus/asm.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <stddef.h>
 
 static inline uint8_t inb(uint16_t port)
 {
@@ -9,11 +10,23 @@ static inline uint8_t inb(uint16_t port)
 	return ret;
 }
 
+static inline void rep_inb(uint16_t port, uint8_t *buffer, size_t count)
+{
+	while (count--)
+		*(buffer++) = inb(port);
+}
+
 static inline void outb(uint16_t port, uint8_t val)
 {
 	__asm__ volatile("outb %0, %1" : : "a"(val), "Nd"(port));
 }
 
+static inline void rep_outb(uint16_t port, uint8_t *buffer, size_t count)
+{
+	while (count--)
+		outb(port, *(buffer++));
+}
+
 static inline uint16_t inw(uint16_t port)
 {
 	uint16_t ret;
@@ -21,11 +34,23 @@ static inline uint16_t inw(uint16_t port)
 	return ret;
 }
 
+static inline void rep_inw(uint16_t port, uint16_t *buffer, size_t count)
+{
+	while (count--)
+		*(buffer++) = inw(port);
+}
+
 static inline void outw(uint16_t port, uint16_t val)
 {
 	__asm__ volatile("outw %0, %1" : : "a"(val), "Nd"(port));
 }
 
+static inline void rep_outw(uint16_t port, uint16_t *buffer, size_t count)
+{
+	while (count--)
+		outw(port, *(buffer++));
+}
+
 static inline uint32_t inl(uint16_t port)
 {
 	uint32_t ret;
@@ -33,12 +58,10 @@ static inline uint32_t inl(uint16_t port)
 	return ret;
 }
 
-static inline void insl(uint16_t port, uint32_t *buffer, uint32_t count)
+static inline void rep_inl(uint16_t port, uint32_t *buffer, size_t count)
 {
-	while (count--) {
-		__asm__ volatile("inl %1, %0" : "=a"(*buffer) : "Nd"(port));
-		buffer++;
-	}
+	while (count--)
+		*(buffer++) = inl(port);
 }
 
 static inline void outl(uint16_t port, uint32_t val)
@@ -46,6 +69,12 @@ static inline void outl(uint16_t port, uint32_t val)
 	__asm__ volatile("outl %0, %1" : : "a"(val), "Nd"(port));
 }
 
+static inline void rep_outl(uint16_t port, uint32_t *buffer, size_t count)
+{
+	while (count--)
+		outl(port, *(buffer++));
+}
+
 static inline void io_wait(void)
 {
 	outb(0x80, 0);
-- 
cgit v1.2.3-freya