From 92e070c50f51491f1336b94215b5bb85332615cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Kala=C5=A1=20=28Floxen=29?=
 <pavelkalas2048@seznam.cz>
Date: Sun, 12 Jul 2026 12:34:30 +0200
Subject: [PATCH] =?UTF-8?q?Upraven=20shell=20statusbar:=20odstran=C4=9Bn?=
 =?UTF-8?q?=20CPU=20usage=20a=20p=C5=99id=C3=A1n=20periodick=C3=BD=20refre?=
 =?UTF-8?q?sh=20vstupu?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 drivers/keyboard.c | 24 +++++++++++++++++++++++-
 include/drivers.h  |  1 +
 kernel/main.c      | 39 +++++----------------------------------
 3 files changed, 29 insertions(+), 35 deletions(-)

diff --git a/drivers/keyboard.c b/drivers/keyboard.c
index 07320d5..cb41613 100644
--- a/drivers/keyboard.c
+++ b/drivers/keyboard.c
@@ -13,6 +13,7 @@
 
 #include "display.h"
 #include "drivers.h"
+#include "timer.h"
 
 #define KBD_HISTORY_MAX 32
 #define KBD_HISTORY_LINE_MAX 128
@@ -22,6 +23,8 @@ static int g_history_count = 0;
 static int g_history_head = 0;
 static int g_ctrl_down = 0;
 static int g_shift_down = 0;
+static void (*g_refresh_cb)(void) = 0;
+static unsigned long g_refresh_interval_ticks = 0;
 
 static char apply_letter_case(char c) {
     int upper = g_shift_down;
@@ -53,6 +56,11 @@ static const char keymap[128] = {
 void keyboard_init(void) {
 }
 
+void keyboard_set_refresh_callback(void (*cb)(void), unsigned long interval_ticks) {
+    g_refresh_cb = cb;
+    g_refresh_interval_ticks = interval_ticks;
+}
+
 int keyboard_try_read_key(void) {
     unsigned char sc;
     int out = -1;
@@ -225,13 +233,27 @@ static void history_push(const char *line) {
 int keyboard_readline(char *buffer, int max_len) {
     int i = 0;
     int history_nav = -1;
+    unsigned long last_refresh_tick = timer_ticks();
 
     if (max_len <= 1) {
         return 0;
     }
 
     for (;;) {
-        int c = keyboard_read_key();
+        int c = keyboard_try_read_key();
+
+        if (c == -1) {
+            if (g_refresh_cb && g_refresh_interval_ticks > 0) {
+                unsigned long now = timer_ticks();
+                if ((now - last_refresh_tick) >= g_refresh_interval_ticks) {
+                    g_refresh_cb();
+                    last_refresh_tick = now;
+                }
+            }
+
+            __asm__ volatile ("pause");
+            continue;
+        }
 
         if (c == ASTER_KEY_F1 || c == ASTER_KEY_F2) {
             continue;
diff --git a/include/drivers.h b/include/drivers.h
index 59a5f6b..7d38da5 100644
--- a/include/drivers.h
+++ b/include/drivers.h
@@ -24,6 +24,7 @@
 #define ASTER_KEY_RIGHT 0x106
 
 void keyboard_init(void);
+void keyboard_set_refresh_callback(void (*cb)(void), unsigned long interval_ticks);
 int keyboard_read_key(void);
 int keyboard_try_read_key(void);
 int keyboard_readline(char *buffer, int max_len);
diff --git a/kernel/main.c b/kernel/main.c
index 256e49c..0163730 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -77,25 +77,6 @@ static unsigned int g_boot_splash_steps_done = 0;
 static char g_boot_splash_log[4][56];
 static unsigned int g_boot_splash_log_count = 0;
 
-static unsigned int cpu_usage_percent(void) {
-    process_t *table = process_table();
-    usize count = process_count();
-    usize active = 0;
-    usize i;
-
-    if (count == 0) {
-        return 0;
-    }
-
-    for (i = 0; i < count; ++i) {
-        if (table[i].state == PROCESS_READY || table[i].state == PROCESS_RUNNING) {
-            ++active;
-        }
-    }
-
-    return (unsigned int)((active * 100U) / count);
-}
-
 static usize append_text(char *dst, usize pos, usize max, const char *src) {
     while (*src && pos + 1 < max) {
         dst[pos++] = *src++;
@@ -190,7 +171,6 @@ static void render_shell_statusbar(void) {
     usize total = memory_total_pages();
     usize freep = memory_free_pages();
     usize used = total >= freep ? total - freep : 0;
-    unsigned int cpu = cpu_usage_percent();
     char left[64];
     char right[64];
     char middle[64];
@@ -227,21 +207,7 @@ static void render_shell_statusbar(void) {
         }
     }
 
-    /* Right aligned label. */
     right[0] = '\0';
-    if (!g_status_marquee_only) {
-        const char *prefix = "cpu usage: ";
-        usize p = 0;
-        while (prefix[p] && p < sizeof(right) - 1) {
-            right[p] = prefix[p];
-            ++p;
-        }
-        p = append_uint(right, p, sizeof(right), cpu);
-        if (p + 1 < sizeof(right)) {
-            right[p++] = '%';
-        }
-        right[p] = '\0';
-    }
 
     rlen = 0;
     while (right[rlen]) ++rlen;
@@ -296,6 +262,10 @@ static void render_shell_statusbar(void) {
     display_set_cursor(save_row, save_col);
 }
 
+static void shell_status_refresh_callback(void) {
+    render_shell_statusbar();
+}
+
 static inline void outb(u16 port, u8 value) {
     __asm__ volatile ("outb %0, %1" : : "a"(value), "Nd"(port));
 }
@@ -2933,6 +2903,7 @@ void kmain(void) {
 
     boot_step_begin("Timer driver");
     timer_init((unsigned int)g_timer_hz);
+    keyboard_set_refresh_callback(shell_status_refresh_callback, g_timer_hz ? g_timer_hz : 100UL);
     boot_step_ok("Timer driver");
 
     boot_step_begin("Storage + AsterFS");