int itcs_timer_irq(int idx, void *arg) { timer_priv_t *timer_priv = (timer_priv_t *)arg; uint32_t tempregisr = 0; switch (timer_priv->timeridx) { case 1: tempregisr = readl(timer_priv->base + TIMER_ISR_C1); // printf("BEFORE READ COUNT1 ISR STAT RET :%08x\n",tempregisr); if (GET_BIT(tempregisr, 4) == 1) { // printf("OVERFLOW INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_OVERFLOW_INTERRUPT; } if (GET_BIT(tempregisr, 0) == 1) { g_endtime = get_timer(0); // printf("INTERVAL INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_INTERVAL_INTERRUPT; } if (GET_BIT(tempregisr, 1) == 1) { g_endtimematch1 = get_timer(0); // printf("MATCH1 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH1_INTERRUPT; } if (GET_BIT(tempregisr, 2) == 1) { g_endtimematch2 = get_timer(0); // printf("MATCH2 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH2_INTERRUPT; } if (GET_BIT(tempregisr, 3) == 1) { g_endtimematch3 = get_timer(0); // printf("MATCH3 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH3_INTERRUPT; } tempregisr = readl(timer_priv->base + TIMER_ISR_C1); // printf("AFTER READ COUNT1 ISR STAT RET :%08x\n",tempregisr); break; case 2: tempregisr = readl(timer_priv->base + TIMER_ISR_C2); // printf("BEFORE READ COUNT2 ISR STAT RET :%08x\n",tempregisr); if (GET_BIT(tempregisr, 4) == 1) { // printf("OVERFLOW INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_OVERFLOW_INTERRUPT; } if (GET_BIT(tempregisr, 0) == 1) { g_endtime = get_timer(0); // printf("INTERVAL INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_INTERVAL_INTERRUPT; } if (GET_BIT(tempregisr, 1) == 1) { // printf("MATCH1 INTERRUPT OCCUR\n"); g_endtimematch1 = get_timer(0); timer_priv->enum_interrupt = TIMER_MATCH1_INTERRUPT; } if (GET_BIT(tempregisr, 2) == 1) { g_endtimematch2 = get_timer(0); // printf("MATCH2 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH2_INTERRUPT; } if (GET_BIT(tempregisr, 3) == 1) { g_endtimematch3 = get_timer(0); // printf("MATCH3 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH3_INTERRUPT; } tempregisr = readl(timer_priv->base + TIMER_ISR_C2); // printf("AFTER READ COUNT2 ISR STAT RET :%08x\n",tempregisr); break; case 3: tempregisr = readl(timer_priv->base + TIMER_ISR_C3); // printf("BEFORE READ COUNT3 ISR STAT RET :%08x\n",tempregisr); if (GET_BIT(tempregisr, 4) == 1) { // printf("OVERFLOW INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_OVERFLOW_INTERRUPT; } if (GET_BIT(tempregisr, 0) == 1) { g_endtime = get_timer(0); // printf("INTERVAL INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_INTERVAL_INTERRUPT; } if (GET_BIT(tempregisr, 1) == 1) { g_endtimematch1 = get_timer(0); // printf("MATCH1 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH1_INTERRUPT; } if (GET_BIT(tempregisr, 2) == 1) { g_endtimematch2 = get_timer(0); // printf("MATCH2 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH2_INTERRUPT; } if (GET_BIT(tempregisr, 3) == 1) { g_endtimematch3 = get_timer(0); // printf("MATCH3 INTERRUPT OCCUR\n"); timer_priv->enum_interrupt = TIMER_MATCH3_INTERRUPT; } tempregisr = readl(timer_priv->base + TIMER_ISR_C3); // printf("AFTER READED COUNT3 ISR STAT RET :%08x\n",readregisr); break; default: break; } if (timer_priv->cb_event) { timer_priv->cb_event(timer_priv); } return 0; }

This code defines a function called "itcs_timer_irq" that handles interrupts for a timer. The function takes two parameters: an integer index "idx" and a void pointer "arg". The "arg" parameter is cast to a pointer to a "timer_priv_t" structure.

Inside the function, there is a switch statement that selects which timer to read the interrupt status register for. Depending on which bits are set in the register, the function sets a corresponding interrupt type in the "enum_interrupt" member of the "timer_priv" structure. Additionally, the function updates global variables "g_endtime", "g_endtimematch1", "g_endtimematch2", or "g_endtimematch3" based on which bits are set in the register.

After handling the interrupt, the function calls a callback function "cb_event" if it is set in the "timer_priv" structure.

The function returns 0.