| 1 | ///////////////////////////////////////////////////////////////////////////
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| 2 | // File : irq_handler.c
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| 3 | // Date : 01/04/2012
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| 4 | // Author : alain greiner
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| 5 | // Copyright (c) UPMC-LIP6
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| 6 | ///////////////////////////////////////////////////////////////////////////
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| 7 |
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| 8 | #include <giet_config.h>
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| 9 | #include <irq_handler.h>
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| 10 | #include <sys_handler.h>
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| 11 | #include <ctx_handler.h>
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| 12 | #include <tim_driver.h>
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| 13 | #include <xcu_driver.h>
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| 14 | #include <pic_driver.h>
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| 15 | #include <tty_driver.h>
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| 16 | #include <nic_driver.h>
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| 17 | #include <cma_driver.h>
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| 18 | #include <mmc_driver.h>
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| 19 | #include <bdv_driver.h>
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| 20 | #include <hba_driver.h>
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| 21 | #include <dma_driver.h>
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| 22 | #include <sdc_driver.h>
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| 23 | #include <mwr_driver.h>
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| 24 | #include <mapping_info.h>
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| 25 | #include <utils.h>
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| 26 | #include <tty0.h>
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| 27 |
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| 28 | ////////////////////////////////////////////////////////////////////////////
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| 29 | // Extern variables
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| 30 | ////////////////////////////////////////////////////////////////////////////
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| 31 |
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| 32 | // allocated in sys_handler.c file
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| 33 | extern unsigned int _tty_channel_wti[NB_TTY_CHANNELS];
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| 34 | extern unsigned int _tim_channel_wti[NB_TIM_CHANNELS];
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| 35 | extern unsigned int _cma_channel_wti[NB_CMA_CHANNELS];
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| 36 | extern unsigned int _nic_rx_channel_wti[NB_NIC_CHANNELS];
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| 37 | extern unsigned int _nic_tx_channel_wti[NB_NIC_CHANNELS];
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| 38 |
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| 39 | /////////////////////////////////////////////////////////////////////////
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| 40 | // Global variables
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| 41 | /////////////////////////////////////////////////////////////////////////
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| 42 |
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| 43 | // array of external IRQ indexes for each (isr/channel) couple
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| 44 | __attribute__((section(".kdata")))
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| 45 | unsigned char _ext_irq_index[GIET_ISR_TYPE_MAX][GIET_ISR_CHANNEL_MAX];
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| 46 |
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| 47 | // WTI mailbox allocators for external IRQ routing (3 allocators per proc)
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| 48 | __attribute__((section(".kdata")))
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| 49 | unsigned char _wti_alloc_one[X_SIZE][Y_SIZE][NB_PROCS_MAX];
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| 50 | __attribute__((section(".kdata")))
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| 51 | unsigned char _wti_alloc_two[X_SIZE][Y_SIZE][NB_PROCS_MAX];
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| 52 | __attribute__((section(".kdata")))
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| 53 | unsigned char _wti_alloc_ter[X_SIZE][Y_SIZE][NB_PROCS_MAX];
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| 54 |
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| 55 | #define MAX_RETRY 10000
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| 56 |
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| 57 | /////////////////////////////////////////////////////////////////////////
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| 58 | // this array is allocated in the boot.c or kernel_init.c
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| 59 | /////////////////////////////////////////////////////////////////////////
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| 60 |
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| 61 | extern static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX];
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| 62 |
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| 63 | /////////////////////////////////////////////////////////////////////////
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| 64 | // These ISR_TYPE names for display must be consistent with values in
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| 65 | // irq_handler.h / mapping.py / xml_driver.c
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| 66 | /////////////////////////////////////////////////////////////////////////
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| 67 |
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| 68 | __attribute__((section(".kdata")))
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| 69 | char* _isr_type_str[] = { "DEFAULT",
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| 70 | "TICK" ,
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| 71 | "TTY_RX" ,
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| 72 | "TTY_TX" ,
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| 73 | "BDV" ,
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| 74 | "TIMER" ,
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| 75 | "WAKUP" ,
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| 76 | "NIC_RX" ,
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| 77 | "NIC_TX" ,
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| 78 | "CMA" ,
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| 79 | "MMC" ,
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| 80 | "DMA" ,
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| 81 | "SPI" ,
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| 82 | "MWR" ,
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| 83 | "HBA" };
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| 84 |
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| 85 | __attribute__((section(".kdata")))
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| 86 | char* _irq_type_str[] = { "HWI",
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| 87 | "WTI",
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| 88 | "PTI" };
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| 89 |
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| 90 | ////////////////////
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| 91 | void _ext_irq_init()
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| 92 | {
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| 93 | mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
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| 94 | mapping_cluster_t* cluster = _get_cluster_base(header);
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| 95 | mapping_periph_t* periph = _get_periph_base(header);
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| 96 | mapping_irq_t* irq = _get_irq_base(header);
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| 97 | unsigned int periph_id; // peripheral index in mapping_info
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| 98 | unsigned int irq_id; // irq index in mapping_info
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| 99 |
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| 100 | // get cluster_io index in mapping
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| 101 | unsigned int x_io = header->x_io;
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| 102 | unsigned int y_io = header->y_io;
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| 103 | unsigned int cluster_io = (x_io * Y_SIZE) + y_io;
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| 104 | mapping_periph_t* pic = NULL;
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| 105 |
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| 106 | // scan external peripherals to find PIC
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| 107 | unsigned int min = cluster[cluster_io].periph_offset ;
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| 108 | unsigned int max = min + cluster[cluster_io].periphs ;
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| 109 |
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| 110 | for ( periph_id = min ; periph_id < max ; periph_id++ )
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| 111 | {
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| 112 | if ( periph[periph_id].type == PERIPH_TYPE_PIC )
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| 113 | {
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| 114 | pic = &periph[periph_id];
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| 115 | break;
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | if ( pic == NULL )
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| 120 | {
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| 121 | _printf("\n[GIET ERROR] in _ext_irq_init() : No PIC component found\n");
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| 122 | _exit();
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| 123 | }
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| 124 |
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| 125 | // scan PIC IRQS defined in mapping
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| 126 | for ( irq_id = pic->irq_offset ;
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| 127 | irq_id < pic->irq_offset + pic->irqs ;
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| 128 | irq_id++ )
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| 129 | {
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| 130 | unsigned int type = irq[irq_id].srctype;
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| 131 | unsigned int srcid = irq[irq_id].srcid;
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| 132 | unsigned int isr = irq[irq_id].isr;
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| 133 | unsigned int channel = irq[irq_id].channel;
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| 134 |
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| 135 | if ( (type != IRQ_TYPE_HWI) ||
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| 136 | (srcid > 31) ||
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| 137 | (isr >= GIET_ISR_TYPE_MAX) ||
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| 138 | (channel >= GIET_ISR_CHANNEL_MAX) )
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| 139 | {
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| 140 | _printf("\n[GIET ERROR] in _ext_irq_init() : Bad PIC IRQ\n"
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| 141 | " type = %d / srcid = %d / isr = %d / channel = %d\n",
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| 142 | type , srcid , isr , channel );
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| 143 | _exit();
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| 144 | }
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| 145 | _ext_irq_index[isr][channel] = srcid;
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| 146 | }
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| 147 | } // end _ext_irq_init()
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| 148 |
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| 149 | /////////////////////////////////////////////
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| 150 | void _ext_irq_alloc( unsigned int isr_type,
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| 151 | unsigned int isr_channel,
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| 152 | unsigned int* wti_index )
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| 153 | {
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| 154 | #if USE_PIC
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| 155 | unsigned int wti_id; // allocated WTI mailbox index in XCU
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| 156 | unsigned int irq_id; // external IRQ index in PIC (input)
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| 157 | unsigned int wti_addr; // WTI mailbox physical address (32 lsb bits)
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| 158 |
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| 159 | unsigned int count = MAX_RETRY;
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| 160 |
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| 161 | // check input arguments
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| 162 | if ( isr_type >= GIET_ISR_TYPE_MAX )
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| 163 | {
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| 164 | _printf("\n[GIET ERROR] in _ext_irq_alloc() : illegal ISR type\n");
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| 165 | _exit();
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| 166 | }
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| 167 | if ( isr_channel >= GIET_ISR_CHANNEL_MAX )
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| 168 | {
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| 169 | _printf("\n[GIET ERROR] in _ext_irq_alloc() : illegal ISR channel\n");
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| 170 | _exit();
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| 171 | }
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| 172 |
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| 173 | // get processor coordinates [x,y,p]
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| 174 | unsigned int gpid = _get_procid();
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| 175 | unsigned int cluster_xy = gpid >> P_WIDTH;
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| 176 | unsigned int x = cluster_xy >> Y_WIDTH;
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| 177 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
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| 178 | unsigned int p = gpid & ((1<<P_WIDTH)-1);
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| 179 |
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| 180 | // allocate a WTI mailbox to proc[x,y,p] (blocking until success)
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| 181 |
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| 182 | while ( 1 )
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| 183 | {
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| 184 | if ( count == 0 )
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| 185 | {
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| 186 | unsigned int trdid = _get_context_slot( CTX_TRDID_ID );
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| 187 | unsigned int vsid = _get_context_slot( CTX_VSID_ID );
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| 188 | _printf("\n[GIET WARNING] thread %x in vspace %d "
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| 189 | "running on P[%d,%d,%d] still waiting in _ext_irq_alloc()\n",
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| 190 | trdid, vsid, x, y, p );
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| 191 | count = MAX_RETRY;
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| 192 | }
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| 193 |
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| 194 | if ( _wti_alloc_one[x][y][p] == 0 )
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| 195 | {
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| 196 | _wti_alloc_one[x][y][p] = 1;
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| 197 | wti_id = p + NB_PROCS_MAX;
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| 198 | break;
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| 199 | }
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| 200 | if ( _wti_alloc_two[x][y][p] == 0 )
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| 201 | {
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| 202 | _wti_alloc_two[x][y][p] = 1;
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| 203 | wti_id = p + 2*NB_PROCS_MAX;
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| 204 | break;
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| 205 | }
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| 206 | if ( _wti_alloc_ter[x][y][p] == 0 )
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| 207 | {
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| 208 | _wti_alloc_ter[x][y][p] = 1;
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| 209 | wti_id = p + 3*NB_PROCS_MAX;
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| 210 | break;
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| 211 | }
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| 212 | count--;
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| 213 | }
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| 214 |
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| 215 | *wti_index = wti_id;
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| 216 |
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| 217 | // register the mailbox physical address in IOPIC
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| 218 | irq_id = _ext_irq_index[isr_type][isr_channel];
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| 219 | _xcu_get_wti_address( wti_id , &wti_addr );
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| 220 | _pic_init( irq_id , wti_addr, cluster_xy );
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| 221 |
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| 222 | // initializes the WTI interrupt vector entry for target XCU
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| 223 | static_scheduler_t* psched = (static_scheduler_t*)_get_sched();
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| 224 | psched->wti_vector[wti_id] = isr_channel<<16 | isr_type;
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| 225 |
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| 226 | #if GIET_DEBUG_IRQS
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| 227 | if ( _get_proctime() > GIET_DEBUG_IRQS )
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| 228 | _printf("\n[DEBUG IRQS] _ext_irq_alloc() for P[%d,%d,%d] at cycle %d\n"
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| 229 | " wti_id = %d / isr_type = %s / channel = %d / pic_input = %d\n",
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| 230 | x , y , p , _get_proctime() ,
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| 231 | wti_id , _isr_type_str[isr_type] , isr_channel , irq_id );
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| 232 | #endif
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| 233 | #endif // USE_PIC
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| 234 | } // end ext_irq_alloc()
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| 235 |
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| 236 | ////////////////////////////////////////////////
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| 237 | void _ext_irq_release( unsigned int isr_type,
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| 238 | unsigned int channel )
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| 239 | {
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| 240 | // check input arguments
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| 241 | if ( isr_type >= GIET_ISR_TYPE_MAX )
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| 242 | {
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| 243 | _printf("\n[GIET ERROR] in _ext_irq_release() : "
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| 244 | "illegal ISR type %d\n", isr_type );
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| 245 | _exit();
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| 246 | }
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| 247 | if ( channel >= GIET_ISR_CHANNEL_MAX )
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| 248 | {
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| 249 | _printf("\n[GIET ERROR] in _ext_irq_release() : "
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| 250 | "illegal ISR channel %d\n", channel );
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| 251 | _exit();
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| 252 | }
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| 253 |
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| 254 | // analyse ISR type to get WTI index (wti), and coordinates
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| 255 | // of processor (x,y,p) that has been allocated the external IRQ
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| 256 | unsigned int wti = 0;
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| 257 | unsigned int x = 0;
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| 258 | unsigned int y = 0;
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| 259 | unsigned int p = 0;
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| 260 |
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| 261 | if ( (isr_type == ISR_TTY_RX) || (isr_type == ISR_TTY_TX) )
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| 262 | {
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| 263 | x = (_tty_channel_wti[channel]>>24) & 0xFF;
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| 264 | y = (_tty_channel_wti[channel]>>16) & 0xFF;
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| 265 | p = (_tty_channel_wti[channel]>> 8) & 0xFF;
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| 266 | wti = (_tty_channel_wti[channel] ) & 0xFF;
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| 267 | }
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| 268 | #if NB_TIM_CHANNELS
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| 269 | else if ( isr_type == ISR_TIMER )
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| 270 | {
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| 271 | x = (_tim_channel_wti[channel]>>24) & 0xFF;
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| 272 | y = (_tim_channel_wti[channel]>>16) & 0xFF;
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| 273 | p = (_tim_channel_wti[channel]>> 8) & 0xFF;
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| 274 | wti = (_tim_channel_wti[channel] ) & 0xFF;
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| 275 | }
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| 276 | #endif
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| 277 | #if NB_CMA_CHANNELS
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| 278 | else if ( isr_type == ISR_CMA )
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| 279 | {
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| 280 | x = (_cma_channel_wti[channel]>>24) & 0xFF;
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| 281 | y = (_cma_channel_wti[channel]>>16) & 0xFF;
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| 282 | p = (_cma_channel_wti[channel]>> 8) & 0xFF;
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| 283 | wti = (_cma_channel_wti[channel] ) & 0xFF;
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| 284 | }
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| 285 | #endif
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| 286 | #if NB_NIC_CHANNELS
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| 287 | else if ( isr_type == ISR_NIC_RX )
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| 288 | {
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| 289 | x = (_nic_rx_channel_wti[channel]>>24) & 0xFF;
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| 290 | y = (_nic_rx_channel_wti[channel]>>16) & 0xFF;
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| 291 | p = (_nic_rx_channel_wti[channel]>> 8) & 0xFF;
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| 292 | wti = (_nic_rx_channel_wti[channel] ) & 0xFF;
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| 293 | }
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| 294 | else if ( isr_type == ISR_NIC_TX )
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| 295 | {
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| 296 | x = (_nic_tx_channel_wti[channel]>>24) & 0xFF;
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| 297 | y = (_nic_tx_channel_wti[channel]>>16) & 0xFF;
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| 298 | p = (_nic_tx_channel_wti[channel]>> 8) & 0xFF;
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| 299 | wti = (_nic_tx_channel_wti[channel] ) & 0xFF;
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| 300 | }
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| 301 | #endif
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| 302 | else
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| 303 | {
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| 304 | _printf("\n[GIET ERROR] in _ext_irq_release() : "
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| 305 | "ISR type %s not supported / thread = %x\n",
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| 306 | _isr_type_str[isr_type] , _get_thread_trdid() );
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| 307 | _exit();
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| 308 | }
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| 309 |
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| 310 | // desactivates dynamically allocated PIC entry
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| 311 | unsigned int irq_id = _ext_irq_index[isr_type][channel];
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| 312 | _pic_set_register( irq_id , IOPIC_MASK , 0 );
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| 313 |
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| 314 | // releases dynamically allocated WTI mailbox
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| 315 | if ( wti == p + NB_PROCS_MAX ) _wti_alloc_one[x][y][p] = 0;
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| 316 | else if ( wti == p + 2*NB_PROCS_MAX ) _wti_alloc_two[x][y][p] = 0;
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| 317 | else if ( wti == p + 3*NB_PROCS_MAX ) _wti_alloc_ter[x][y][p] = 0;
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| 318 | else
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| 319 | {
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| 320 | _printf("\n[GIET ERROR] in _ext_irq_release() : "
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| 321 | "WTI = %d / X = %d / Y = %d / P = %d\n", wti , x, y , p );
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| 322 | _exit();
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| 323 | }
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| 324 | } // end ext_irq_release()
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| 325 |
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| 326 | /////////////////
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| 327 | void _irq_demux()
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| 328 | {
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| 329 | unsigned int gpid = _get_procid();
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| 330 | unsigned int cluster_xy = gpid >> P_WIDTH;
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| 331 | unsigned int x = cluster_xy >> Y_WIDTH;
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| 332 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
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| 333 | unsigned int p = gpid & ((1<<P_WIDTH)-1);
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| 334 | unsigned int irq_id;
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| 335 | unsigned int irq_type;
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| 336 |
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| 337 | // get the highest priority active IRQ index
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| 338 | unsigned int icu_out_index = p * IRQ_PER_PROCESSOR;
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| 339 |
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| 340 | _xcu_get_index( cluster_xy, icu_out_index, &irq_id, &irq_type );
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| 341 |
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| 342 | if (irq_id < 32)
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| 343 | {
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| 344 | static_scheduler_t* psched = (static_scheduler_t*)_get_sched();
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| 345 | unsigned int entry = 0;
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| 346 | unsigned int isr_type;
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| 347 | unsigned int channel;
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| 348 |
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| 349 | if (irq_type == IRQ_TYPE_HWI) entry = psched->hwi_vector[irq_id];
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| 350 | else if (irq_type == IRQ_TYPE_PTI) entry = psched->pti_vector[irq_id];
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| 351 | else if (irq_type == IRQ_TYPE_WTI) entry = psched->wti_vector[irq_id];
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| 352 | else
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| 353 | {
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| 354 | _printf("\n[GIET ERROR] illegal irq_type in irq_demux()\n");
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| 355 | _exit();
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| 356 | }
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| 357 |
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| 358 | isr_type = (entry ) & 0x0000FFFF;
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| 359 | channel = (entry>>16) & 0x00007FFF;
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| 360 |
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| 361 | #if GIET_DEBUG_IRQS // we don't take the TTY lock to avoid deadlocks
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| 362 | if ( _get_proctime() > GIET_DEBUG_IRQS )
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| 363 | _nolock_printf("\n[DEBUG IRQS] _irq_demux() Processor[%d,%d,%d] enters at cycle %d\n"
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| 364 | " irq_type = %s / irq_id = %d / isr_type = %s / channel = %d\n",
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| 365 | x , y , p , _get_proctime() ,
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| 366 | _irq_type_str[irq_type] , irq_id , _isr_type_str[isr_type] , channel );
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| 367 | #endif
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| 368 |
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| 369 | // ISR call
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| 370 | if ( isr_type == ISR_TICK ) _isr_tick ( irq_type, irq_id, channel );
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| 371 | else if ( isr_type == ISR_TTY_RX ) _tty_rx_isr ( irq_type, irq_id, channel );
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| 372 | else if ( isr_type == ISR_TTY_TX ) _tty_tx_isr ( irq_type, irq_id, channel );
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| 373 | else if ( isr_type == ISR_BDV ) _bdv_isr ( irq_type, irq_id, channel );
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| 374 | else if ( isr_type == ISR_TIMER ) _timer_isr ( irq_type, irq_id, channel );
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| 375 | else if ( isr_type == ISR_WAKUP ) _isr_wakup ( irq_type, irq_id, channel );
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| 376 | else if ( isr_type == ISR_NIC_RX ) _nic_rx_isr ( irq_type, irq_id, channel );
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| 377 | else if ( isr_type == ISR_NIC_TX ) _nic_tx_isr ( irq_type, irq_id, channel );
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| 378 | else if ( isr_type == ISR_CMA ) _cma_isr ( irq_type, irq_id, channel );
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| 379 | else if ( isr_type == ISR_MMC ) _mmc_isr ( irq_type, irq_id, channel );
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| 380 | else if ( isr_type == ISR_DMA ) _dma_isr ( irq_type, irq_id, channel );
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| 381 | else if ( isr_type == ISR_SDC ) _sdc_isr ( irq_type, irq_id, channel );
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| 382 | else if ( isr_type == ISR_MWR ) _mwr_isr ( irq_type, irq_id, channel );
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| 383 | else if ( isr_type == ISR_HBA ) _hba_isr ( irq_type, irq_id, channel );
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| 384 | else
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| 385 | {
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| 386 | _printf("\n[GIET ERROR] in _irq_demux() :"
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| 387 | " illegal ISR type on processor[%d,%d,%d] at cycle %d\n"
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| 388 | " - irq_type = %s\n"
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| 389 | " - irq_id = %d\n"
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| 390 | " - isr_type = %s\n",
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| 391 | x, y, p, _get_proctime(),
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| 392 | _irq_type_str[irq_type] , irq_id , _isr_type_str[isr_type] );
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| 393 | _exit();
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| 394 | }
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| 395 | }
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| 396 | else // no interrupt active
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| 397 | {
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| 398 | _isr_default();
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| 399 | }
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| 400 | }
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| 401 |
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| 402 | ///////////////////
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| 403 | void _isr_default()
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| 404 | {
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| 405 | unsigned int gpid = _get_procid();
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| 406 | unsigned int cluster_xy = gpid >> P_WIDTH;
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| 407 | unsigned int x = cluster_xy >> Y_WIDTH;
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| 408 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
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| 409 | unsigned int p = gpid & ((1<<P_WIDTH)-1);
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| 410 |
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| 411 | _printf("\n[GIET WARNING] IRQ handler called but no active IRQ "
|
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| 412 | "on processor[%d,%d,%d] at cycle %d\n",
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| 413 | x, y, p, _get_proctime() );
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| 414 | }
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| 415 |
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| 416 |
|
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| 417 | ////////////////////////////////////////////////////////////
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| 418 | void _isr_wakup( unsigned int irq_type, // HWI / WTI / PTI
|
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| 419 | unsigned int irq_id, // index returned by ICU
|
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| 420 | unsigned int channel ) // unused
|
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| 421 | {
|
|---|
| 422 | unsigned int gpid = _get_procid();
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| 423 | unsigned int cluster_xy = gpid >> P_WIDTH;
|
|---|
| 424 | unsigned int x = cluster_xy >> Y_WIDTH;
|
|---|
| 425 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
|
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| 426 | unsigned int p = gpid & ((1<<P_WIDTH)-1);
|
|---|
| 427 |
|
|---|
| 428 | unsigned int value; // WTI mailbox value
|
|---|
| 429 | unsigned int save_sr; // save SR value in pre-empted thread stack
|
|---|
| 430 |
|
|---|
| 431 | unsigned int ltid = _get_thread_ltid();
|
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| 432 |
|
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| 433 | if ( irq_type != IRQ_TYPE_WTI )
|
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| 434 | {
|
|---|
| 435 | _printf("[GIET ERROR] P[%d,%d,%d] enters _isr_wakup() at cycle %d\n"
|
|---|
| 436 | " but not called by a WTI interrupt\n",
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| 437 | x , y , p , _get_proctime() );
|
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| 438 | _exit();
|
|---|
| 439 | }
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| 440 |
|
|---|
| 441 | // get mailbox value and acknowledge WTI
|
|---|
| 442 | _xcu_get_wti_value( cluster_xy, irq_id, &value );
|
|---|
| 443 |
|
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| 444 | #if GIET_DEBUG_IRQS
|
|---|
| 445 | if ( _get_proctime() > GIET_DEBUG_IRQS )
|
|---|
| 446 | _printf("\n[DEBUG IRQS] P[%d,%d,%d] enters _isr_wakup() at cycle %d\n"
|
|---|
| 447 | " WTI index = %d / current ltid = %d / mailbox value = %x\n",
|
|---|
| 448 | x , y , p , _get_proctime() , irq_id , ltid , value );
|
|---|
| 449 | #endif
|
|---|
| 450 |
|
|---|
| 451 | // enter critical section and swich context (if required)
|
|---|
| 452 | if ( (ltid == IDLE_THREAD_INDEX) || (value != 0) )
|
|---|
| 453 | {
|
|---|
| 454 | _it_disable( &save_sr );
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|---|
| 455 | _ctx_switch();
|
|---|
| 456 | _it_restore( &save_sr );
|
|---|
| 457 | }
|
|---|
| 458 |
|
|---|
| 459 | } // end _isr_wakup
|
|---|
| 460 |
|
|---|
| 461 | ///////////////////////////////////////////////////////////
|
|---|
| 462 | void _isr_tick( unsigned int irq_type, // HWI / WTI / PTI
|
|---|
| 463 | unsigned int irq_id, // index returned by ICU
|
|---|
| 464 | unsigned int channel ) // channel index if HWI
|
|---|
| 465 | {
|
|---|
| 466 | unsigned int gpid = _get_procid();
|
|---|
| 467 | unsigned int cluster_xy = gpid >> P_WIDTH;
|
|---|
| 468 | unsigned int x = cluster_xy >> Y_WIDTH;
|
|---|
| 469 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
|
|---|
| 470 | unsigned int p = gpid & ((1<<P_WIDTH)-1);
|
|---|
| 471 |
|
|---|
| 472 | unsigned int save_sr; // save SR value in pre-empted thread stack
|
|---|
| 473 |
|
|---|
| 474 | if ( irq_type != IRQ_TYPE_PTI )
|
|---|
| 475 | {
|
|---|
| 476 | _printf("[GIET ERROR] P[%d,%d,%d] enters _isr_tick() at cycle %d\n"
|
|---|
| 477 | " but not called by a PTI interrupt\n",
|
|---|
| 478 | x , y , p , _get_proctime() );
|
|---|
| 479 | _exit();
|
|---|
| 480 | }
|
|---|
| 481 |
|
|---|
| 482 | // acknowledge PTI
|
|---|
| 483 | _xcu_timer_reset_irq( cluster_xy, irq_id );
|
|---|
| 484 |
|
|---|
| 485 | #if GIET_DEBUG_IRQS
|
|---|
| 486 | unsigned int ltid = _get_thread_ltid();
|
|---|
| 487 | if ( _get_proctime() > GIET_DEBUG_IRQS )
|
|---|
| 488 | _printf("\n[DEBUG IRQS] P[%d,%d,%d] enters _isr_tick() at cycle %d\n"
|
|---|
| 489 | " WTI index = %d / current ltid = %d\n",
|
|---|
| 490 | x , y , p , _get_proctime() , irq_id , ltid );
|
|---|
| 491 | #endif
|
|---|
| 492 |
|
|---|
| 493 | // enter critical section and switch context
|
|---|
| 494 | _it_disable( &save_sr );
|
|---|
| 495 | _ctx_switch();
|
|---|
| 496 | _it_restore( &save_sr );
|
|---|
| 497 |
|
|---|
| 498 | } // end _isr_tick
|
|---|
| 499 |
|
|---|
| 500 |
|
|---|
| 501 | // Local Variables:
|
|---|
| 502 | // tab-width: 4
|
|---|
| 503 | // c-basic-offset: 4
|
|---|
| 504 | // c-file-offsets:((innamespace . 0)(inline-open . 0))
|
|---|
| 505 | // indent-tabs-mode: nil
|
|---|
| 506 | // End:
|
|---|
| 507 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
|
|---|
| 508 |
|
|---|
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