From 3e7d1acffd81175246fab1ed8be30569c9cd3289 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sun, 10 Apr 2022 15:13:49 +0200
Subject: kernel: idle process

---
 src/kernel/arch/i386/driver/ps2.c | 9 ++++-----
 src/kernel/arch/i386/driver/ps2.h | 1 +
 2 files changed, 5 insertions(+), 5 deletions(-)

(limited to 'src/kernel/arch/i386/driver')

diff --git a/src/kernel/arch/i386/driver/ps2.c b/src/kernel/arch/i386/driver/ps2.c
index 697bd34..5121b9e 100644
--- a/src/kernel/arch/i386/driver/ps2.c
+++ b/src/kernel/arch/i386/driver/ps2.c
@@ -7,17 +7,16 @@
 static volatile uint8_t backlog[BACKLOG_CAPACITY] = {};
 static volatile size_t backlog_size = 0;
 
+bool ps2_ready(void) {
+	return backlog_size > 0;
+}
+
 void ps2_recv(uint8_t s) {
 	if (backlog_size >= BACKLOG_CAPACITY) return;
 	backlog[backlog_size++] = s;
 }
 
 size_t ps2_read(uint8_t *buf, size_t len) {
-	irq_interrupt_flag(true);
-	while (backlog_size == 0)
-		asm("hlt" ::: "memory");
-	irq_interrupt_flag(false);
-
 	if (backlog_size <= len)
 		len = backlog_size;
 	backlog_size -= len; /* guaranteed to never be < 0 */
diff --git a/src/kernel/arch/i386/driver/ps2.h b/src/kernel/arch/i386/driver/ps2.h
index 4b56056..712b157 100644
--- a/src/kernel/arch/i386/driver/ps2.h
+++ b/src/kernel/arch/i386/driver/ps2.h
@@ -3,5 +3,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
+bool	ps2_ready(void);
 void	ps2_recv(uint8_t scancode);
 size_t	ps2_read(uint8_t *buf, size_t max_len);
-- 
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