1 /*
2 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
3 * Copyright (c) 2018,2020, The Linux Foundation. All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 */
7 #include <assert.h>
8 #include <stdint.h>
9
10 #include <arch_helpers.h>
11 #include <bl31/interrupt_mgmt.h>
12 #include <drivers/arm/gic_common.h>
13 #include <lib/el3_runtime/context_mgmt.h>
14
15 #include <platform.h>
16 #include <qti_interrupt_svc.h>
17 #include <qtiseclib_interface.h>
18
19 #define QTI_INTR_INVALID_INT_NUM 0xFFFFFFFFU
20
21 /*
22 * Top-level EL3 interrupt handler.
23 */
qti_el3_interrupt_handler(uint32_t id,uint32_t flags,void * handle,void * cookie)24 static uint64_t qti_el3_interrupt_handler(uint32_t id, uint32_t flags,
25 void *handle, void *cookie)
26 {
27 uint32_t irq = QTI_INTR_INVALID_INT_NUM;
28
29 /*
30 * EL3 non-interruptible. Interrupt shouldn't occur when we are at
31 * EL3 / Secure.
32 */
33 assert(handle != cm_get_context(SECURE));
34
35 irq = plat_ic_acknowledge_interrupt();
36
37 qtiseclib_invoke_isr(irq, handle);
38
39 /* End of Interrupt. */
40 if (irq < 1022U) {
41 plat_ic_end_of_interrupt(irq);
42 }
43
44 return (uint64_t) handle;
45 }
46
qti_interrupt_svc_init(void)47 int qti_interrupt_svc_init(void)
48 {
49 int ret;
50 uint64_t flags = 0U;
51
52 /*
53 * Route EL3 interrupts to EL3 when in Non-secure.
54 * Note: EL3 won't have interrupt enable
55 * & we don't have S-EL1 support.
56 */
57 set_interrupt_rm_flag(flags, NON_SECURE);
58
59 /* Register handler for EL3 interrupts */
60 ret = register_interrupt_type_handler(INTR_TYPE_EL3,
61 qti_el3_interrupt_handler, flags);
62 assert(ret == 0);
63
64 return ret;
65 }
66