litmus-rt.git - The LITMUS^RT kernel.

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author	Jan Beulich <jbeulich@novell.com>	2009-03-12 08:08:49 -0400
committer	Ingo Molnar <mingo@elte.hu>	2009-03-12 08:13:07 -0400
commit	02dde8b45c5460794b9052d7c12939fe3eb63c2c (patch)
tree	5c24bd6411e3fb704c81694f8f63e8bd963848ad /include/linux/sysctl.h
parent	821508d4ef7920283b960057903505fed609fd16 (diff)

x86: move various CPU initialization objects into .cpuinit.rodata

Impact: debuggability and micro-optimization Putting whatever is possible into the (final) .rodata section increases the likelihood of catching memory corruption bugs early, and reduces false cache line sharing. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <49B90961.76E4.0078.0@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>

Diffstat (limited to 'include/linux/sysctl.h')

0 files changed, 0 insertions, 0 deletions

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/* * include/linux/phy.h * * Framework and drivers for configuring and reading different PHYs * Based on code in sungem_phy.c and gianfar_phy.c * * Author: Andy Fleming * * Copyright (c) 2004 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #ifndef __PHY_H #define __PHY_H #include <linux/spinlock.h> #include <linux/device.h> #include <linux/ethtool.h> #include <linux/mii.h> #include <linux/timer.h> #include <linux/workqueue.h> #include <asm/atomic.h> #define PHY_BASIC_FEATURES (SUPPORTED_10baseT_Half | \ SUPPORTED_10baseT_Full | \ SUPPORTED_100baseT_Half | \ SUPPORTED_100baseT_Full | \ SUPPORTED_Autoneg | \ SUPPORTED_TP | \ SUPPORTED_MII) #define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES | \ SUPPORTED_1000baseT_Half | \ SUPPORTED_1000baseT_Full) /* * Set phydev->irq to PHY_POLL if interrupts are not supported, * or not desired for this PHY. Set to PHY_IGNORE_INTERRUPT if * the attached driver handles the interrupt */ #define PHY_POLL -1 #define PHY_IGNORE_INTERRUPT -2 #define PHY_HAS_INTERRUPT 0x00000001 #define PHY_HAS_MAGICANEG 0x00000002 /* Interface Mode definitions */ typedef enum { PHY_INTERFACE_MODE_MII, PHY_INTERFACE_MODE_GMII, PHY_INTERFACE_MODE_SGMII, PHY_INTERFACE_MODE_TBI, PHY_INTERFACE_MODE_RMII, PHY_INTERFACE_MODE_RGMII, PHY_INTERFACE_MODE_RGMII_ID, PHY_INTERFACE_MODE_RGMII_RXID, PHY_INTERFACE_MODE_RGMII_TXID, PHY_INTERFACE_MODE_RTBI } phy_interface_t; #define PHY_INIT_TIMEOUT 100000 #define PHY_STATE_TIME 1 #define PHY_FORCE_TIMEOUT 10 #define PHY_AN_TIMEOUT 10 #define PHY_MAX_ADDR 32 /* Used when trying to connect to a specific phy (mii bus id:phy device id) */ #define PHY_ID_FMT "%s:%02x" /* * Need to be a little smaller than phydev->dev.bus_id to leave room * for the ":%02x" */ #define MII_BUS_ID_SIZE (20 - 3) /* * The Bus class for PHYs. Devices which provide access to * PHYs should register using this structure */ struct mii_bus { const char *name; char id[MII_BUS_ID_SIZE]; void *priv; int (*read)(struct mii_bus *bus, int phy_id, int regnum); int (*write)(struct mii_bus *bus, int phy_id, int regnum, u16 val); int (*reset)(struct mii_bus *bus); /* * A lock to ensure that only one thing can read/write * the MDIO bus at a time */ struct mutex mdio_lock; struct device *parent; enum { MDIOBUS_ALLOCATED = 1, MDIOBUS_REGISTERED, MDIOBUS_UNREGISTERED, MDIOBUS_RELEASED, } state; struct device dev; /* list of all PHYs on bus */ struct phy_device *phy_map[PHY_MAX_ADDR]; /* Phy addresses to be ignored when probing */ u32 phy_mask; /* * Pointer to an array of interrupts, each PHY's * interrupt at the index matching its address */ int *irq; }; #define to_mii_bus(d) container_of(d, struct mii_bus, dev) struct mii_bus *mdiobus_alloc(void); int mdiobus_register(struct mii_bus *bus); void mdiobus_unregister(struct mii_bus *bus); void mdiobus_free(struct mii_bus *bus); struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr); int mdiobus_read(struct mii_bus *bus, int addr, u16 regnum); int mdiobus_write(struct mii_bus *bus, int addr, u16 regnum, u16 val); #define PHY_INTERRUPT_DISABLED 0x0 #define PHY_INTERRUPT_ENABLED 0x80000000 /* PHY state machine states: * * DOWN: PHY device and driver are not ready for anything. probe * should be called if and only if the PHY is in this state, * given that the PHY device exists. * - PHY driver probe function will, depending on the PHY, set * the state to STARTING or READY * * STARTING: PHY device is coming up, and the ethernet driver is * not ready. PHY drivers may set this in the probe function. * If they do, they are responsible for making sure the state is * eventually set to indicate whether the PHY is UP or READY, * depending on the state when the PHY is done starting up. * - PHY driver will set the state to READY * - start will set the state to PENDING * * READY: PHY is ready to send and receive packets, but the * controller is not. By default, PHYs which do not implement * probe will be set to this state by phy_probe(). If the PHY * driver knows the PHY is ready, and the PHY state is STARTING, * then it sets this STATE. * - start will set the state to UP * * PENDING: PHY device is coming up, but the ethernet driver is * ready. phy_start will set this state if the PHY state is * STARTING. * - PHY driver will set the state to UP when the PHY is ready * * UP: The PHY and attached device are ready to do work. * Interrupts should be started here. * - timer moves to AN * * AN: The PHY is currently negotiating the link state. Link is * therefore down for now. phy_timer will set this state when it * detects the state is UP. config_aneg will set this state * whenever called with phydev->autoneg set to AUTONEG_ENABLE. * - If autonegotiation finishes, but there's no link, it sets * the state to NOLINK. * - If aneg finishes with link, it sets the state to RUNNING, * and calls adjust_link * - If autonegotiation did not finish after an arbitrary amount * of time, autonegotiation should be tried again if the PHY * supports "magic" autonegotiation (back to AN) * - If it didn't finish, and no magic_aneg, move to FORCING. * * NOLINK: PHY is up, but not currently plugged in. * - If the timer notes that the link comes back, we move to RUNNING * - config_aneg moves to AN * - phy_stop moves to HALTED * * FORCING: PHY is being configured with forced settings * - if link is up, move to RUNNING * - If link is down, we drop to the next highest setting, and * retry (FORCING) after a timeout * - phy_stop moves to HALTED * * RUNNING: PHY is currently up, running, and possibly sending * and/or receiving packets * - timer will set CHANGELINK if we're polling (this ensures the * link state is polled every other cycle of this state machine, * which makes it every other second) * - irq will set CHANGELINK * - config_aneg will set AN * - phy_stop moves to HALTED * * CHANGELINK: PHY experienced a change in link state * - timer moves to RUNNING if link * - timer moves to NOLINK if the link is down * - phy_stop moves to HALTED * * HALTED: PHY is up, but no polling or interrupts are done. Or * PHY is in an error state. * * - phy_start moves to RESUMING * * RESUMING: PHY was halted, but now wants to run again. * - If we are forcing, or aneg is done, timer moves to RUNNING * - If aneg is not done, timer moves to AN * - phy_stop moves to HALTED */ enum phy_state { PHY_DOWN=0, PHY_STARTING, PHY_READY, PHY_PENDING, PHY_UP, PHY_AN, PHY_RUNNING, PHY_NOLINK, PHY_FORCING, PHY_CHANGELINK, PHY_HALTED, PHY_RESUMING }; /* phy_device: An instance of a PHY * * drv: Pointer to the driver for this PHY instance * bus: Pointer to the bus this PHY is on * dev: driver model device structure for this PHY * phy_id: UID for this device found during discovery * state: state of the PHY for management purposes * dev_flags: Device-specific flags used by the PHY driver. * addr: Bus address of PHY * link_timeout: The number of timer firings to wait before the * giving up on the current attempt at acquiring a link * irq: IRQ number of the PHY's interrupt (-1 if none) * phy_timer: The timer for handling the state machine * phy_queue: A work_queue for the interrupt * attached_dev: The attached enet driver's device instance ptr * adjust_link: Callback for the enet controller to respond to * changes in the link state. * adjust_state: Callback for the enet driver to respond to * changes in the state machine. * * speed, duplex, pause, supported, advertising, and * autoneg are used like in mii_if_info * * interrupts currently only supports enabled or disabled, * but could be changed in the future to support enabling * and disabling specific interrupts * * Contains some infrastructure for polling and interrupt * handling, as well as handling shifts in PHY hardware state */ struct phy_device { /* Information about the PHY type */


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