Ignore:
Timestamp:
Apr 26, 2017, 2:08:13 PM (6 years ago)
Author:
alain
Message:

Introduce dev_fbf, dev dma, dev_iob

File:
1 edited

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  • trunk/kernel/devices/dev_icu.h

    r1 r3  
    3535 * acting in all clusters containing cores. He is in charge of concentrating all IRQs
    3636 * (interrupt requests) generated by peripherals to signal the completion of an I/O
    37  * operation. Each IRQ should be routed to the core that started the I/O operation.
     37 * operation. Each IRQ is routed to the core that started the I/O operation.
    3838 * The ICU device must also help the kernel to select the ISR (Interrupt Service Routine)
    3939 * that must be executed by the target core.
    4040 *
    41  * This component can be implemented as a dedicated hardware, centralized or distributed
     41 * This component can be implemented as a dedicated hardware component distributed
    4242 * in all clusters, or emulated in software, as long as it implements the specified API.
    4343 * For the TSAR architecture, this generic ICU device is implemented by the two hardware
    4444 * components soclib_xicu and and soclib_iopic, and their associated drivers.
    4545 *
    46  * ALMOS-MKH defines three types of IRQs, that are handled iby this ICU device:
     46 * ALMOS-MKH defines three types of IRQs, that are handled by this ICU device:
    4747 * - HWI : The HardWare Interrupts are generated by local internal peripherals.
    4848 *   They are connected to the local ICU, to be routed to a given local core.
     
    7272 * uses three interrupts vectors, implemented as three arrays (HWI/WTI/PTI),
    7373 * stored in the core descriptor. Each entry in one interrupt vector array contains
    74  * an extended pointer on the device descriptor that is the "source" of the interrupt.
    75  * This device descriptor contains a link to the ISR to be executed.
     74 * a pointer on the chdev descriptor that is the "source" of the interrupt.
     75 * This chdev descriptor contains a link to the ISR to be executed.
    7676 *
    7777 * The ICU peripheral does not execute I/O operations, but is just acting as a
    78  * dynamically configurable interrupt router for another I/O operation.
    79  * Therefore, ALMOS-MKH does not use the iCU device waiting queue, but calls directly
     78 * dynamically configurable interrupt router for other I/O operations.
     79 * Therefore, ALMOS-MKH does not use the ICU device waiting queue, but calls directly
    8080 * the ICU driver blocking functions, using the device lock to get exclusive access to
    8181 * the ICU device state.
     
    8484/****  Forward declarations  ****/
    8585
    86 struct device_s;
     86struct chdev_s;
    8787
    8888/*****************************************************************************************
     
    127127/*****************************************************************************************
    128128 * This function makes two initialisations:
    129  * - It initialises the ICU specific fields of the device descriptor.
     129 * - It initialises the ICU specific fields of the chdev descriptor.
    130130 * - it initialises the implementation specific ICU hardware device and associated
    131131 *   data structures if required.
    132  * It must be executed once in the cluster containing the ICU device descriptor.
    133  *****************************************************************************************
    134  * @ icu_xp     : extended pointer on ICU device descriptor.
    135  * @ hwi_nr     : number of HWI irqs.
    136  * @ wti_nr     : number of WTI irqs.
    137  * @ pti_nr     : number of PTI irqs.
    138  ****************************************************************************************/
    139 void dev_icu_init( xptr_t    icu_xp,
    140                    uint32_t  hwi_nr,
    141                    uint32_t  wti_nr,
    142                    uint32_t  pti_nr );
    143 
    144 /*****************************************************************************************
    145  * This function enables the routing of a given IRQ, to a given core in a remote cluster.
    146  * This IRQ is identified by its type (HWI/WTI/PTI) and index in the remote ICU.
     132 * It must be called by a local thread.
     133 *****************************************************************************************
     134 * @ icu     : pointer on ICU chdev descriptor.
     135 * @ hwi_nr  : number of HWI irqs.
     136 * @ wti_nr  : number of WTI irqs.
     137 * @ pti_nr  : number of PTI irqs.
     138 ****************************************************************************************/
     139void dev_icu_init( struct chdev_s  * icu,
     140                   uint32_t          hwi_nr,
     141                   uint32_t          wti_nr,
     142                   uint32_t          pti_nr );
     143
     144/*****************************************************************************************
     145 * This function enables the routing of a given IRQ, to a given core in the local cluster.
     146 * This IRQ is identified by its type (HWI/WTI/PTI) and index in the local ICU.
    147147 * The target core is identified by its local index.
    148  * As it uses remote accesses, it can be executed by any thread in any cluster.
    149  * - It unmask the selected IRQ in the remote ICU.
    150  * - It registers the extended pointer on the "source" device descriptor in the
     148 * It must be called by a local thread.
     149 * - It unmask the selected IRQ in the ICU.
     150 * - It registers the pointer on the "source" chdev descriptor in the
    151151 *   relevant interrupt vector of the selected core.
    152  * - It register the IRQ type and index in the "source" device descriptor.
    153  *****************************************************************************************
    154  * @ cxy        : remote cluster identifier (can be the local custer).
    155  * @ lid        : local index of selected core in remote cluster.
     152 * - It register the IRQ type and index in the "source" chdev descriptor.
     153 *****************************************************************************************
     154 * @ lid        : local index of selected core.
    156155 * @ irq_type   : HWI/WTI/PTI.
    157  * @ irq_id     : IRQ index in remote ICU
    158  * @ src_dev_xp : extended pointer on device descriptor source of IRQ.
    159  ****************************************************************************************/
    160 void dev_icu_enable_irq( cxy_t      cxy,
    161                          lid_t      lid,
    162                          uint32_t   irq_type,
    163                          uint32_t   irq_id,
    164                          xptr_t     src_dev_xp );
    165 
    166 /*****************************************************************************************
    167  * This function disables one given IRQ for a given core in a remote cluster.
    168  * This IRQ is identified by its type (HWI/WTI/PTI) and index in the remote ICU.
     156 * @ irq_id     : IRQ index in ICU
     157 * @ chdev      : pointer on source chdev descriptor.
     158 ****************************************************************************************/
     159void dev_icu_enable_irq( lid_t             lid,
     160                         uint32_t          irq_type,
     161                         uint32_t          irq_id,
     162                         struct chdev_s  * chdev );
     163
     164/*****************************************************************************************
     165 * This function disables one given IRQ for a given core in the local cluster.
     166 * This IRQ is identified by its type (HWI/WTI/PTI) and index in the local ICU.
    169167 * The core is identified by its local index.
    170  * As it uses remote accesses, it can be executed by any thread in any cluster.
    171  * - It mask the selected IRQ in the remote ICU.
    172  * - It removes the extended pointer on the "source" device descriptor from the
     168 * It must be called by a local thread.
     169 * - It mask the selected IRQ in the ICU.
     170 * - It removes the pointer on the "source" chdev descriptor from the
    173171 *   relevant interrupt vector of the selected core.
    174  * - The IRQ type and index fields are not modified in the "source" device descriptor.
    175  *****************************************************************************************
    176  * @ cxy       : remote cluster identifier (can be the local custer).
     172 * - The IRQ type and index fields are not modified in the "source" chdev descriptor.
     173 *****************************************************************************************
    177174 * @ lid       : local index of selected core in remote cluster.
    178175 * @ irq_type  : HWI/WTI/PTI.
    179176 * @ irq_id    : IRQ index.
    180177 ****************************************************************************************/
    181 void dev_icu_disable_irq( cxy_t      cxy,
    182                           lid_t      lid,
     178void dev_icu_disable_irq( lid_t      lid,
    183179                          uint32_t   irq_type,
    184180                          uint32_t   irq_id );
     
    187183 * This function set the period value for a timer identified by the PTI index,
    188184 * in the local ICU device descriptor.
     185 * It must be called by a local thread.
    189186 *****************************************************************************************
    190187 * @ pti_id    : PTI index.
     
    197194 * This function acknowledge a PTI IRQ for a timer identified by the PTI index,
    198195 * in the local ICU device descriptor.
     196 * It must be called by a local thread.
    199197 *****************************************************************************************
    200198 * @ pti_id    : PTI index.
     
    204202/*****************************************************************************************
    205203 * This function send an IPI (Inter Processor Interrupt) to a core identified by
    206  * its cluster identifier and local index.
     204 * its cluster identifier and local index.
     205 * It can be called by any thread running in any cluster.
    207206 * This IPI force a context switch, and the handling of pending RPC(s).
    208207 *****************************************************************************************
     
    226225
    227226/*****************************************************************************************
    228  * This function implements the WTI mailbox allocator. It is used by all I/O operations
    229  * for completion signaling.
     227 * This function implements the WTI mailbox allocator for the local ICU.
     228 * These mailbox are used by I/O operations for completion signaling.
     229 * It must be called by a thread running in the cluster containing the target ICU.
    230230 * If there is no mailbox available, the client thread must deschedule and retry later.
    231231 * If N is the total number of WTI mailboxes in a cluster, and NC the number of cores,
     
    240240/*****************************************************************************************
    241241 * This function releases a dynamically allocated WTI mailbox.
     242 * It must be called by a thread running in the cluster containing the target ICU.
    242243 * It does not access the hardware device.
    243244 *****************************************************************************************
     
    247248
    248249/*****************************************************************************************
    249  * This function returns an extended pointer on a WTI mailbox identified by its
    250  * cluster identifier and local index in ICU.
    251  * WARNING: we assume that all ICU hardware devices have the same local base address.
    252  *****************************************************************************************
    253  * @ cxy      : mailbox cluster identifier
    254  * @ wti_id   : mailbox WTI index.
    255  * @ returns extended pointer on mailbox register.
    256  ****************************************************************************************/
    257 xptr_t  dev_icu_wti_xptr( cxy_t    cxy,
    258                           uint32_t wti_id );
     250 * This function returns a pointer on the WTI mailbox identified by its index
     251 * in the local ICU device.
     252 *****************************************************************************************
     253 * @ wti_id   : WTI mailbox index.
     254 * @ returns pointer on mailbox register.
     255 ****************************************************************************************/
     256uint32_t * dev_icu_wti_ptr( uint32_t wti_id );
    259257
    260258#endif  /* _DEV_ICU_H_ */
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