ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / arch / sh / boards / superh / microdev / led.c
blob36e54b47a752dda9cc67f97e8b162a4430958be4
1 /*
2 * linux/arch/sh/boards/superh/microdev/led.c
4 * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com>
5 * Copyright (C) 2003 Richard Curnow (Richard.Curnow@superh.com)
7 * May be copied or modified under the terms of the GNU General Public
8 * License. See linux/COPYING for more information.
12 #include <asm/io.h>
14 #define LED_REGISTER 0xa6104d20
16 static void mach_led_d9(int value)
18 unsigned long reg;
19 reg = ctrl_inl(LED_REGISTER);
20 reg &= ~1;
21 reg |= (value & 1);
22 ctrl_outl(reg, LED_REGISTER);
23 return;
26 static void mach_led_d10(int value)
28 unsigned long reg;
29 reg = ctrl_inl(LED_REGISTER);
30 reg &= ~2;
31 reg |= ((value & 1) << 1);
32 ctrl_outl(reg, LED_REGISTER);
33 return;
37 #ifdef CONFIG_HEARTBEAT
38 #include <linux/sched.h>
40 static unsigned char banner_table[] = {
41 0x11, 0x01, 0x11, 0x01, 0x11, 0x03,
42 0x11, 0x01, 0x11, 0x01, 0x13, 0x03,
43 0x11, 0x01, 0x13, 0x01, 0x13, 0x01, 0x11, 0x03,
44 0x11, 0x03,
45 0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
46 0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x11, 0x07,
47 0x13, 0x01, 0x13, 0x03,
48 0x11, 0x01, 0x11, 0x03,
49 0x13, 0x01, 0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
50 0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
51 0x13, 0x01, 0x13, 0x01, 0x13, 0x03,
52 0x13, 0x01, 0x11, 0x01, 0x11, 0x03,
53 0x11, 0x03,
54 0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x13, 0x07,
55 0xff
58 static void banner(void)
60 static int pos = 0;
61 static int count = 0;
63 if (count) {
64 count--;
65 } else {
66 int val = banner_table[pos];
67 if (val == 0xff) {
68 pos = 0;
69 val = banner_table[pos];
71 pos++;
72 mach_led_d10((val >> 4) & 1);
73 count = 10 * (val & 0xf);
77 /* From heartbeat_harp in the stboards directory */
78 /* acts like an actual heart beat -- ie thump-thump-pause... */
79 void microdev_heartbeat(void)
81 static unsigned cnt = 0, period = 0, dist = 0;
83 if (cnt == 0 || cnt == dist)
84 mach_led_d9(1);
85 else if (cnt == 7 || cnt == dist+7)
86 mach_led_d9(0);
88 if (++cnt > period) {
89 cnt = 0;
90 /* The hyperbolic function below modifies the heartbeat period
91 * length in dependency of the current (5min) load. It goes
92 * through the points f(0)=126, f(1)=86, f(5)=51,
93 * f(inf)->30. */
94 period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
95 dist = period / 4;
98 banner();
101 #endif