4  * SPDX-License-Identifier: Apache-2.0
6  * HW IRQ controller model
27  * irq handler
41 static bool lock_ignore; /* For the hard fake IRQ, temporarily ignore lock */
44 /* note that prio = 0 == highest, prio=255 == lowest */
46 static int currently_running_prio = 256; /* 255 is the lowest prio interrupt */
75 void hw_irq_ctrl_prio_set(unsigned int irq, unsigned int prio)  in hw_irq_ctrl_prio_set()  argument
77 	irq_prio[irq] = prio;  in hw_irq_ctrl_prio_set()
80 uint8_t hw_irq_ctrl_get_prio(unsigned int irq)  in hw_irq_ctrl_get_prio()  argument
82 	return irq_prio[irq];  in hw_irq_ctrl_get_prio()
89  * If none, return -1
94 		return -1;  in hw_irq_ctrl_get_highest_prio_irq()
98 	int winner = -1;  in hw_irq_ctrl_get_highest_prio_irq()
102 		int irq_nbr = find_lsb_set(hw_irq_status) - 1;  in hw_irq_ctrl_get_highest_prio_irq()
151 void hw_irq_ctrl_disable_irq(unsigned int irq)  in hw_irq_ctrl_disable_irq()  argument
153 	irq_mask &= ~((uint64_t)1<<irq);  in hw_irq_ctrl_disable_irq()
156 int hw_irq_ctrl_is_irq_enabled(unsigned int irq)  in hw_irq_ctrl_is_irq_enabled()  argument
158 	return (irq_mask & ((uint64_t)1 << irq))?1:0;  in hw_irq_ctrl_is_irq_enabled()
166 void hw_irq_ctrl_clear_irq(unsigned int irq)  in hw_irq_ctrl_clear_irq()  argument
168 	irq_status  &= ~((uint64_t)1<<irq);  in hw_irq_ctrl_clear_irq()
169 	irq_premask &= ~((uint64_t)1<<irq);  in hw_irq_ctrl_clear_irq()
181 void hw_irq_ctrl_enable_irq(unsigned int irq)  in hw_irq_ctrl_enable_irq()  argument
183 	irq_mask |= ((uint64_t)1<<irq);  in hw_irq_ctrl_enable_irq()
184 	if (irq_premask & ((uint64_t)1<<irq)) { /* if IRQ is pending */  in hw_irq_ctrl_enable_irq()
185 		hw_irq_ctrl_raise_im_from_sw(irq);  in hw_irq_ctrl_enable_irq()
190 static inline void hw_irq_ctrl_irq_raise_prefix(unsigned int irq)  in hw_irq_ctrl_irq_raise_prefix()  argument
192 	if (irq < N_IRQS) {  in hw_irq_ctrl_irq_raise_prefix()
193 		irq_premask |= ((uint64_t)1<<irq);  in hw_irq_ctrl_irq_raise_prefix()
195 		if (irq_mask & (1 << irq)) {  in hw_irq_ctrl_irq_raise_prefix()
196 			irq_status |= ((uint64_t)1<<irq);  in hw_irq_ctrl_irq_raise_prefix()
198 	} else if (irq == PHONY_HARD_IRQ) {  in hw_irq_ctrl_irq_raise_prefix()
206  * This function is meant to be used by either the SW manual IRQ raising
207  * or by HW which wants the IRQ to be raised in one delta cycle from now
209 void hw_irq_ctrl_set_irq(unsigned int irq)  in hw_irq_ctrl_set_irq()  argument
211 	hw_irq_ctrl_irq_raise_prefix(irq);  in hw_irq_ctrl_set_irq()
215 		 * Note that we awake the CPU even if the IRQ is disabled  in hw_irq_ctrl_set_irq()
217 		 * instruction and the CPU is allowed to awake just with the irq  in hw_irq_ctrl_set_irq()
230 	 * We always awake the CPU even if the IRQ was masked,  in irq_raising_from_hw_now()
247 void hw_irq_ctrl_raise_im(unsigned int irq)  in hw_irq_ctrl_raise_im()  argument
249 	hw_irq_ctrl_irq_raise_prefix(irq);  in hw_irq_ctrl_raise_im()
258 void hw_irq_ctrl_raise_im_from_sw(unsigned int irq)  in hw_irq_ctrl_raise_im_from_sw()  argument
260 	hw_irq_ctrl_irq_raise_prefix(irq);  in hw_irq_ctrl_raise_im_from_sw()