arch/parisc/include/asm/led.h

Source file repositories/reference/linux-study-clean/arch/parisc/include/asm/led.h

File Facts

System
Linux kernel
Corpus path
arch/parisc/include/asm/led.h
Extension
.h
Size
1210 bytes
Lines
38
Domain
Architecture Layer
Bucket
arch/parisc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef LED_H
#define LED_H

#define	LED7		0x80		/* top (or furthest right) LED */
#define	LED6		0x40
#define	LED5		0x20
#define	LED4		0x10
#define	LED3		0x08
#define	LED2		0x04
#define	LED1		0x02
#define	LED0		0x01		/* bottom (or furthest left) LED */

#define	LED_LAN_RCV	LED0		/* for LAN receive activity */
#define	LED_LAN_TX	LED1		/* for LAN transmit activity */
#define	LED_DISK_IO	LED2		/* for disk activity */
#define	LED_HEARTBEAT	LED3		/* heartbeat */

/* values for pdc_chassis_lcd_info_ret_block.model: */
#define DISPLAY_MODEL_LCD  0		/* KittyHawk LED or LCD */
#define DISPLAY_MODEL_NONE 1		/* no LED or LCD */
#define DISPLAY_MODEL_LASI 2		/* LASI style 8 bit LED */
#define DISPLAY_MODEL_OLD_ASP 0x7F	/* faked: ASP style 8 x 1 bit LED (only very old ASP versions) */

#define LED_CMD_REG_NONE 0		/* NULL == no addr for the cmd register */

/* register_led_driver() */
int register_led_driver(int model, unsigned long cmd_reg, unsigned long data_reg);

#ifdef CONFIG_CHASSIS_LCD_LED
/* writes a string to the LCD display (if possible on this h/w) */
void lcd_print(const char *str);
#else
#define lcd_print(str) do { } while (0)
#endif

#endif /* LED_H */

Annotation

Implementation Notes