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📄 cvmip.h(5.88 KB)
📄 cvmx-abi.h(3.67 KB)
📄 cvmx-access-native.h(26.79 KB)
📄 cvmx-access.h(7.82 KB)
📄 cvmx-address.h(10.26 KB)
📄 cvmx-agl-defs.h(213.66 KB)
📄 cvmx-app-hotplug.c(27.64 KB)
📄 cvmx-app-hotplug.h(5.77 KB)
📄 cvmx-app-init-linux.c(14.29 KB)
📄 cvmx-app-init.c(22.54 KB)
📄 cvmx-app-init.h(19.32 KB)
📄 cvmx-asm.h(39.3 KB)
📄 cvmx-asx0-defs.h(5.19 KB)
📄 cvmx-asxx-defs.h(50.57 KB)
📄 cvmx-atomic.h(21.71 KB)
📄 cvmx-bootloader.h(5.64 KB)
📄 cvmx-bootmem.c(40.91 KB)
📄 cvmx-bootmem.h(18.88 KB)
📄 cvmx-ciu-defs.h(702.5 KB)
📄 cvmx-ciu2-defs.h(487.31 KB)
📄 cvmx-clock.c(4.48 KB)
📄 cvmx-clock.h(4.43 KB)
📄 cvmx-cmd-queue.c(11.84 KB)
📄 cvmx-cmd-queue.h(22 KB)
📄 cvmx-cn3010-evb-hs5.c(6.05 KB)
📄 cvmx-cn3010-evb-hs5.h(2.3 KB)
📄 cvmx-compactflash.c(12.8 KB)
📄 cvmx-compactflash.h(3.05 KB)
📄 cvmx-core.c(5.3 KB)
📄 cvmx-core.h(9.46 KB)
📄 cvmx-coremask.c(4.12 KB)
📄 cvmx-coremask.h(8.11 KB)
📄 cvmx-crypto.c(2.6 KB)
📄 cvmx-crypto.h(2.54 KB)
📄 cvmx-csr-enums.h(8.45 KB)
📄 cvmx-csr-typedefs.h(3.92 KB)
📄 cvmx-csr.h(11.46 KB)
📄 cvmx-dbg-defs.h(6.28 KB)
📄 cvmx-debug-handler.S(7.44 KB)
📄 cvmx-debug-remote.c(3.24 KB)
📄 cvmx-debug-uart.c(7.88 KB)
📄 cvmx-debug.c(55.98 KB)
📄 cvmx-debug.h(22.2 KB)
📄 cvmx-dfa-defs.h(383.08 KB)
📄 cvmx-dfa.c(3.7 KB)
📄 cvmx-dfa.h(34.87 KB)
📄 cvmx-dfm-defs.h(205.93 KB)
📄 cvmx-dma-engine.c(20.25 KB)
📄 cvmx-dma-engine.h(24.06 KB)
📄 cvmx-dpi-defs.h(107.61 KB)
📄 cvmx-ebt3000.c(3.82 KB)
📄 cvmx-ebt3000.h(2.25 KB)
📄 cvmx-endor-defs.h(311.42 KB)
📄 cvmx-eoi-defs.h(26.27 KB)
📄 cvmx-fau.h(20.31 KB)
📄 cvmx-flash.c(22.46 KB)
📄 cvmx-flash.h(3.8 KB)
📄 cvmx-fpa-defs.h(157.78 KB)
📄 cvmx-fpa.c(6.63 KB)
📄 cvmx-fpa.h(10.39 KB)
📄 cvmx-gmx.h(3.07 KB)
📄 cvmx-gmxx-defs.h(505.27 KB)
📄 cvmx-gpio-defs.h(36.89 KB)
📄 cvmx-gpio.h(5.48 KB)
📄 cvmx-helper-board.c(58 KB)
📄 cvmx-helper-board.h(7.82 KB)
📄 cvmx-helper-cfg.c(18.68 KB)
📄 cvmx-helper-cfg.h(8.1 KB)
📄 cvmx-helper-check-defines.h(4.1 KB)
📄 cvmx-helper-errata.c(11.91 KB)
📄 cvmx-helper-errata.h(3.24 KB)
📄 cvmx-helper-fpa.c(8.81 KB)
📄 cvmx-helper-fpa.h(3.21 KB)
📄 cvmx-helper-ilk.c(12.74 KB)
📄 cvmx-helper-ilk.h(3.58 KB)
📄 cvmx-helper-jtag.c(7.05 KB)
📄 cvmx-helper-jtag.h(3.91 KB)
📄 cvmx-helper-loop.c(4.35 KB)
📄 cvmx-helper-loop.h(2.78 KB)
📄 cvmx-helper-npi.c(5.72 KB)
📄 cvmx-helper-npi.h(2.82 KB)
📄 cvmx-helper-rgmii.c(19.12 KB)
📄 cvmx-helper-rgmii.h(4.5 KB)
📄 cvmx-helper-sgmii.c(27.09 KB)
📄 cvmx-helper-sgmii.h(4.3 KB)
📄 cvmx-helper-spi.c(8.4 KB)
📄 cvmx-helper-spi.h(3.68 KB)
📄 cvmx-helper-srio.c(11.58 KB)
📄 cvmx-helper-srio.h(3.6 KB)
📄 cvmx-helper-util.c(25.77 KB)
📄 cvmx-helper-util.h(9.88 KB)
📄 cvmx-helper-xaui.c(16.54 KB)
📄 cvmx-helper-xaui.h(4.29 KB)
📄 cvmx-helper.c(69.71 KB)
📄 cvmx-helper.h(12.7 KB)
📄 cvmx-hfa.c(5.04 KB)
📄 cvmx-hfa.h(10.3 KB)
📄 cvmx-higig.h(23.21 KB)
📄 cvmx-ilk-defs.h(170.31 KB)
📄 cvmx-ilk.c(45.16 KB)
📄 cvmx-ilk.h(5.89 KB)
📄 cvmx-interrupt-handler.S(5.87 KB)
📄 cvmx-interrupt.c(47.42 KB)
📄 cvmx-interrupt.h(8.07 KB)
📄 cvmx-iob-defs.h(89.11 KB)
📄 cvmx-iob1-defs.h(6.8 KB)
📄 cvmx-ipd-defs.h(186.51 KB)
📄 cvmx-ipd.c(12.88 KB)
📄 cvmx-ipd.h(6.3 KB)
📄 cvmx-ixf18201.c(12.8 KB)
📄 cvmx-ixf18201.h(3.54 KB)
📄 cvmx-key-defs.h(11 KB)
📄 cvmx-key.h(3.29 KB)
📄 cvmx-l2c-defs.h(353.27 KB)
📄 cvmx-l2c.c(52.95 KB)
📄 cvmx-l2c.h(19.72 KB)
📄 cvmx-l2d-defs.h(60.71 KB)
📄 cvmx-l2t-defs.h(50.68 KB)
📄 cvmx-led-defs.h(22.68 KB)
📄 cvmx-llm.c(36.51 KB)
📄 cvmx-llm.h(11.72 KB)
📄 cvmx-lmcx-defs.h(532.21 KB)
📄 cvmx-log-arc.S(5.67 KB)
📄 cvmx-log.c(18.26 KB)
📄 cvmx-log.h(4.95 KB)
📁 cvmx-malloc
📄 cvmx-malloc.h(7.2 KB)
📄 cvmx-mdio.h(15.99 KB)
📄 cvmx-mgmt-port.c(36.2 KB)
📄 cvmx-mgmt-port.h(7.23 KB)
📄 cvmx-mio-defs.h(454.14 KB)
📄 cvmx-mixx-defs.h(94.59 KB)
📄 cvmx-mpi-defs.h(33.42 KB)
📄 cvmx-nand.c(76.64 KB)
📄 cvmx-nand.h(26.85 KB)
📄 cvmx-ndf-defs.h(25.53 KB)
📄 cvmx-npei-defs.h(378.19 KB)
📄 cvmx-npi-defs.h(252.36 KB)
📄 cvmx-npi.h(4.69 KB)
📄 cvmx-packet.h(2.94 KB)
📄 cvmx-pci-defs.h(250.53 KB)
📄 cvmx-pci.h(2.37 KB)
📄 cvmx-pcie.c(63 KB)
📄 cvmx-pcie.h(10.08 KB)
📄 cvmx-pcieepx-defs.h(304.49 KB)
📄 cvmx-pciercx-defs.h(284.89 KB)
📄 cvmx-pcm-defs.h(12.34 KB)
📄 cvmx-pcmx-defs.h(46.12 KB)
📄 cvmx-pcsx-defs.h(71.23 KB)
📄 cvmx-pcsxx-defs.h(45.79 KB)
📄 cvmx-pemx-defs.h(68.97 KB)
📄 cvmx-pescx-defs.h(49.92 KB)
📄 cvmx-pexp-defs.h(97.89 KB)
📄 cvmx-pip-defs.h(315.91 KB)
📄 cvmx-pip.h(33.65 KB)
📄 cvmx-pko-defs.h(181.41 KB)
📄 cvmx-pko.c(32 KB)
📄 cvmx-pko.h(31.29 KB)
📄 cvmx-platform.h(7.45 KB)
📄 cvmx-pow-defs.h(93.02 KB)
📄 cvmx-pow.c(32.26 KB)
📄 cvmx-pow.h(100.93 KB)
📄 cvmx-power-throttle.c(7.25 KB)
📄 cvmx-power-throttle.h(3.85 KB)
📄 cvmx-profiler.c(7.81 KB)
📄 cvmx-profiler.h(3.15 KB)
📄 cvmx-qlm-tables.c(35.37 KB)
📄 cvmx-qlm.c(23.41 KB)
📄 cvmx-qlm.h(4.76 KB)
📄 cvmx-rad-defs.h(43.58 KB)
📄 cvmx-raid.c(4.71 KB)
📄 cvmx-raid.h(13.02 KB)
📄 cvmx-resources.config(7.66 KB)
📄 cvmx-rng.h(5.02 KB)
📄 cvmx-rnm-defs.h(13.03 KB)
📄 cvmx-rtc.h(4.21 KB)
📄 cvmx-rwlock.h(5.25 KB)
📄 cvmx-scratch.h(4.76 KB)
📄 cvmx-shared-linux-n32.ld(11.8 KB)
📄 cvmx-shared-linux-o32.ld(10.67 KB)
📄 cvmx-shared-linux.ld(11.77 KB)
📄 cvmx-shmem.c(18.89 KB)
📄 cvmx-shmem.h(4.11 KB)
📄 cvmx-sim-magic.h(5.59 KB)
📄 cvmx-sli-defs.h(312.94 KB)
📄 cvmx-smi-defs.h(4.09 KB)
📄 cvmx-smix-defs.h(21.71 KB)
📄 cvmx-spi.c(24.99 KB)
📄 cvmx-spi.h(10.22 KB)
📄 cvmx-spi4000.c(19.23 KB)
📄 cvmx-spinlock.h(11.73 KB)
📄 cvmx-spx0-defs.h(3.94 KB)
📄 cvmx-spxx-defs.h(62.44 KB)
📄 cvmx-srio.c(63.05 KB)
📄 cvmx-srio.h(26.68 KB)
📄 cvmx-sriomaintx-defs.h(222.52 KB)
📄 cvmx-sriox-defs.h(211.56 KB)
📄 cvmx-srxx-defs.h(14.41 KB)
📄 cvmx-sso-defs.h(87.33 KB)
📄 cvmx-stxx-defs.h(34.02 KB)
📄 cvmx-swap.h(4.11 KB)
📄 cvmx-sysinfo.c(8.78 KB)
📄 cvmx-sysinfo.h(6.45 KB)
📄 cvmx-thunder.c(9.22 KB)
📄 cvmx-thunder.h(4.54 KB)
📄 cvmx-tim-defs.h(58.36 KB)
📄 cvmx-tim.c(10.92 KB)
📄 cvmx-tim.h(12.1 KB)
📄 cvmx-tlb.c(10.12 KB)
📄 cvmx-tlb.h(5.07 KB)
📄 cvmx-tra-defs.h(4.59 KB)
📄 cvmx-tra.c(31.16 KB)
📄 cvmx-tra.h(34.28 KB)
📄 cvmx-trax-defs.h(197.09 KB)
📄 cvmx-twsi.c(16.25 KB)
📄 cvmx-twsi.h(10.22 KB)
📄 cvmx-uahcx-defs.h(181.38 KB)
📄 cvmx-uart.c(5.69 KB)
📄 cvmx-uart.h(4.58 KB)
📄 cvmx-uctlx-defs.h(50.26 KB)
📄 cvmx-usb.c(138.53 KB)
📄 cvmx-usb.h(46.67 KB)
📄 cvmx-usbcx-defs.h(259.23 KB)
📄 cvmx-usbd.c(36.09 KB)
📄 cvmx-usbd.h(9.82 KB)
📄 cvmx-usbnx-defs.h(136.12 KB)
📄 cvmx-utils.h(7.54 KB)
📄 cvmx-version.h(2.23 KB)
📄 cvmx-warn.c(2.75 KB)
📄 cvmx-warn.h(2.43 KB)
📄 cvmx-wqe.h(38.61 KB)
📄 cvmx-zip-defs.h(43.18 KB)
📄 cvmx-zip.c(7.37 KB)
📄 cvmx-zip.h(8.5 KB)
📄 cvmx-zone.c(4.7 KB)
📄 cvmx.h(3.5 KB)
📄 octeon-boot-info.h(8.08 KB)
📄 octeon-feature.c(4.71 KB)
📄 octeon-feature.h(11.94 KB)
📄 octeon-model.c(15.79 KB)
📄 octeon-model.h(16.53 KB)
📄 octeon-pci-console.c(19.73 KB)
📄 octeon-pci-console.h(5.18 KB)

Editing: cvmx-spinlock.h

/***********************license start***************
 * Copyright (c) 2003-2010  Cavium Inc. (support@cavium.com). All rights
 * reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.

*   * Neither the name of Cavium Inc. nor the names of
 *     its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written
 *     permission.

* This Software, including technical data, may be subject to U.S. export  control
 * laws, including the U.S. Export Administration Act and its  associated
 * regulations, and may be subject to export or import  regulations in other
 * countries.

* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
 * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
 * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
 * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
 * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
 * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
 * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
 * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE  RISK ARISING OUT OF USE OR
 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
 ***********************license end**************************************/

/**
 * @file
 *
 * Implementation of spinlocks.
 *
 * <hr>$Revision: 70030 $<hr>
 */

#ifndef __CVMX_SPINLOCK_H__
#define __CVMX_SPINLOCK_H__

#include "cvmx-asm.h"

#ifdef	__cplusplus
extern "C" {
#endif

/* Spinlocks for Octeon */

// define these to enable recursive spinlock debugging
//#define CVMX_SPINLOCK_DEBUG

/**
 * Spinlocks for Octeon
 */
typedef struct {
    volatile uint32_t value;
} cvmx_spinlock_t;

// note - macros not expanded in inline ASM, so values hardcoded
#define  CVMX_SPINLOCK_UNLOCKED_VAL  0
#define  CVMX_SPINLOCK_LOCKED_VAL    1

#define CVMX_SPINLOCK_UNLOCKED_INITIALIZER  {CVMX_SPINLOCK_UNLOCKED_VAL}

/**
 * Initialize a spinlock
 *
 * @param lock   Lock to initialize
 */
static inline void cvmx_spinlock_init(cvmx_spinlock_t *lock)
{
    lock->value = CVMX_SPINLOCK_UNLOCKED_VAL;
}

/**
 * Return non-zero if the spinlock is currently locked
 *
 * @param lock   Lock to check
 * @return Non-zero if locked
 */
static inline int cvmx_spinlock_locked(cvmx_spinlock_t *lock)
{
    return (lock->value != CVMX_SPINLOCK_UNLOCKED_VAL);
}

/**
 * Releases lock
 *
 * @param lock   pointer to lock structure
 */
static inline void cvmx_spinlock_unlock(cvmx_spinlock_t *lock)
{
    CVMX_SYNCWS;
    lock->value = 0;
    CVMX_SYNCWS;
}

/**
 * Attempts to take the lock, but does not spin if lock is not available.
 * May take some time to acquire the lock even if it is available
 * due to the ll/sc not succeeding.
 *
 * @param lock   pointer to lock structure
 *
 * @return 0: lock successfully taken
 *         1: lock not taken, held by someone else
 * These return values match the Linux semantics.
 */

static inline unsigned int cvmx_spinlock_trylock(cvmx_spinlock_t *lock)
{
    unsigned int tmp;

__asm__ __volatile__(
    ".set noreorder         \n"
    "1: ll   %[tmp], %[val] \n"
    "   bnez %[tmp], 2f     \n"  // if lock held, fail immediately
    "   li   %[tmp], 1      \n"
    "   sc   %[tmp], %[val] \n"
    "   beqz %[tmp], 1b     \n"
    "   li   %[tmp], 0      \n"
    "2:                     \n"
    ".set reorder           \n"
    : [val] "+m" (lock->value), [tmp] "=&r" (tmp)
    :
    : "memory");

return (!!tmp);  /* normalize to 0 or 1 */
}

/**
 * Gets lock, spins until lock is taken
 *
 * @param lock   pointer to lock structure
 */
static inline void cvmx_spinlock_lock(cvmx_spinlock_t *lock)
{
    unsigned int tmp;

__asm__ __volatile__(
    ".set noreorder         \n"
    "1: ll   %[tmp], %[val]  \n"
    "   bnez %[tmp], 1b     \n"
    "   li   %[tmp], 1      \n"
    "   sc   %[tmp], %[val] \n"
    "   beqz %[tmp], 1b     \n"
    "   nop                \n"
    ".set reorder           \n"
    : [val] "+m" (lock->value), [tmp] "=&r" (tmp)
    :
    : "memory");

}

/** ********************************************************************
 * Bit spinlocks
 * These spinlocks use a single bit (bit 31) of a 32 bit word for locking.
 * The rest of the bits in the word are left undisturbed.  This enables more
 * compact data structures as only 1 bit is consumed for the lock.
 *
 */

/**
 * Gets lock, spins until lock is taken
 * Preserves the low 31 bits of the 32 bit
 * word used for the lock.
 *
 *
 * @param word  word to lock bit 31 of
 */
static inline void cvmx_spinlock_bit_lock(uint32_t *word)
{
    unsigned int tmp;
    unsigned int sav;

__asm__ __volatile__(
    ".set noreorder         \n"
    ".set noat              \n"
    "1: ll    %[tmp], %[val]  \n"
    "   bbit1 %[tmp], 31, 1b    \n"
    "   li    $at, 1      \n"
    "   ins   %[tmp], $at, 31, 1  \n"
    "   sc    %[tmp], %[val] \n"
    "   beqz  %[tmp], 1b     \n"
    "   nop                \n"
    ".set at              \n"
    ".set reorder           \n"
    : [val] "+m" (*word), [tmp] "=&r" (tmp), [sav] "=&r" (sav)
    :
    : "memory");

}

/**
 * Attempts to get lock, returns immediately with success/failure
 * Preserves the low 31 bits of the 32 bit
 * word used for the lock.
 *
 *
 * @param word  word to lock bit 31 of
 * @return 0: lock successfully taken
 *         1: lock not taken, held by someone else
 * These return values match the Linux semantics.
 */
static inline unsigned int cvmx_spinlock_bit_trylock(uint32_t *word)
{
    unsigned int tmp;

__asm__ __volatile__(
    ".set noreorder         \n"
    ".set noat              \n"
    "1: ll    %[tmp], %[val] \n"
    "   bbit1 %[tmp], 31, 2f     \n"  // if lock held, fail immediately
    "   li    $at, 1      \n"
    "   ins   %[tmp], $at, 31, 1  \n"
    "   sc    %[tmp], %[val] \n"
    "   beqz  %[tmp], 1b     \n"
    "   li    %[tmp], 0      \n"
    "2:                     \n"
    ".set at              \n"
    ".set reorder           \n"
    : [val] "+m" (*word), [tmp] "=&r" (tmp)
    :
    : "memory");

return (!!tmp);  /* normalize to 0 or 1 */
}
/**
 * Releases bit lock
 *
 * Unconditionally clears bit 31 of the lock word.  Note that this is
 * done non-atomically, as this implementation assumes that the rest
 * of the bits in the word are protected by the lock.
 *
 * @param word  word to unlock bit 31 in
 */
static inline void cvmx_spinlock_bit_unlock(uint32_t *word)
{
    CVMX_SYNCWS;
    *word &= ~(1UL << 31) ;
    CVMX_SYNCWS;
}

/** ********************************************************************
 * Recursive spinlocks
 */
typedef struct {
	volatile unsigned int value;
	volatile unsigned int core_num;
} cvmx_spinlock_rec_t;

/**
 * Initialize a recursive spinlock
 *
 * @param lock   Lock to initialize
 */
static inline void cvmx_spinlock_rec_init(cvmx_spinlock_rec_t *lock)
{
    lock->value = CVMX_SPINLOCK_UNLOCKED_VAL;
}

/**
 * Return non-zero if the recursive spinlock is currently locked
 *
 * @param lock   Lock to check
 * @return Non-zero if locked
 */
static inline int cvmx_spinlock_rec_locked(cvmx_spinlock_rec_t *lock)
{
    return (lock->value != CVMX_SPINLOCK_UNLOCKED_VAL);
}

/**
* Unlocks one level of recursive spinlock.  Lock is not unlocked
* unless this is the final unlock call for that spinlock
*
* @param lock   ptr to recursive spinlock structure
*/
static inline void cvmx_spinlock_rec_unlock(cvmx_spinlock_rec_t *lock);

#ifdef CVMX_SPINLOCK_DEBUG
#define cvmx_spinlock_rec_unlock(x)  _int_cvmx_spinlock_rec_unlock((x), __FILE__, __LINE__)
static inline void _int_cvmx_spinlock_rec_unlock(cvmx_spinlock_rec_t *lock, char *filename, int linenum)
#else
static inline void cvmx_spinlock_rec_unlock(cvmx_spinlock_rec_t *lock)
#endif
{

unsigned int temp, result;
    int core_num;
    core_num = cvmx_get_core_num();

#ifdef CVMX_SPINLOCK_DEBUG
    {
        if (lock->core_num != core_num)
        {
            cvmx_dprintf("ERROR: Recursive spinlock release attemped by non-owner! file: %s, line: %d\n", filename, linenum);
            return;
        }
    }
#endif

__asm__ __volatile__(
		".set  noreorder                 \n"
		"     addi  %[tmp], %[pid], 0x80 \n"
		"     sw    %[tmp], %[lid]       # set lid to invalid value\n"
                CVMX_SYNCWS_STR
		"1:   ll    %[tmp], %[val]       \n"
		"     addu  %[res], %[tmp], -1   # decrement lock count\n"
		"     sc    %[res], %[val]       \n"
		"     beqz  %[res], 1b           \n"
		"     nop                        \n"
		"     beq   %[tmp], %[res], 2f   # res is 1 on successful sc       \n"
		"     nop                        \n"
		"     sw   %[pid], %[lid]        # set lid to pid, only if lock still held\n"
		"2:                         \n"
                CVMX_SYNCWS_STR
		".set  reorder                   \n"
		: [res] "=&r" (result), [tmp] "=&r" (temp), [val] "+m" (lock->value), [lid] "+m" (lock->core_num)
		: [pid] "r" (core_num)
		: "memory");

#ifdef CVMX_SPINLOCK_DEBUG
    {
        if (lock->value == ~0UL)
        {
            cvmx_dprintf("ERROR: Recursive spinlock released too many times! file: %s, line: %d\n", filename, linenum);
        }
    }
#endif

}

/**
 * Takes recursive spinlock for a given core.  A core can take the lock multiple
 * times, and the lock is released only when the corresponding number of
 * unlocks have taken place.
 *
 * NOTE: This assumes only one thread per core, and that the core ID is used as
 * the lock 'key'.  (This implementation cannot be generalized to allow
 * multiple threads to use the same key (core id) .)
 *
 * @param lock   address of recursive spinlock structure.  Note that this is
 *               distinct from the standard spinlock
 */
static inline void cvmx_spinlock_rec_lock(cvmx_spinlock_rec_t *lock);

#ifdef CVMX_SPINLOCK_DEBUG
#define cvmx_spinlock_rec_lock(x)  _int_cvmx_spinlock_rec_lock((x), __FILE__, __LINE__)
static inline void _int_cvmx_spinlock_rec_lock(cvmx_spinlock_rec_t *lock, char *filename, int linenum)
#else
static inline void cvmx_spinlock_rec_lock(cvmx_spinlock_rec_t *lock)
#endif
{

volatile unsigned int tmp;
	volatile int core_num;

core_num = cvmx_get_core_num();

__asm__ __volatile__(
		".set  noreorder              \n"
		"1: ll   %[tmp], %[val]       # load the count\n"
		"   bnez %[tmp], 2f           # if count!=zero branch to 2\n"
		"   addu %[tmp], %[tmp], 1    \n"
		"   sc   %[tmp], %[val]       \n"
		"   beqz %[tmp], 1b           # go back if not success\n"
		"   nop                       \n"
		"   j    3f                   # go to write core_num \n"
		"2: lw   %[tmp], %[lid]       # load the core_num \n"
		"   bne  %[tmp], %[pid], 1b   # core_num no match, restart\n"
		"   nop                       \n"
		"   lw   %[tmp], %[val]       \n"
		"   addu %[tmp], %[tmp], 1    \n"
		"   sw   %[tmp], %[val]       # update the count\n"
		"3: sw   %[pid], %[lid]       # store the core_num\n"
                CVMX_SYNCWS_STR
		".set  reorder                \n"
		: [tmp] "=&r" (tmp), [val] "+m" (lock->value), [lid] "+m" (lock->core_num)
		: [pid] "r" (core_num)
		: "memory");

#ifdef CVMX_SPINLOCK_DEBUG
    if (lock->core_num != core_num)
    {
        cvmx_dprintf("cvmx_spinlock_rec_lock: lock taken, but core_num is incorrect. file: %s, line: %d\n", filename, linenum);
    }
#endif

}

#ifdef	__cplusplus
}
#endif

#endif /* __CVMX_SPINLOCK_H__ */

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