1 | /* |
---|
2 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
---|
3 | * |
---|
4 | * embedded brains GmbH |
---|
5 | * Dornierstr. 4 |
---|
6 | * 82178 Puchheim |
---|
7 | * Germany |
---|
8 | * <info@embedded-brains.de> |
---|
9 | * |
---|
10 | * The license and distribution terms for this file may be |
---|
11 | * found in the file LICENSE in this distribution or at |
---|
12 | * http://www.rtems.com/license/LICENSE. |
---|
13 | */ |
---|
14 | |
---|
15 | #include <assert.h> |
---|
16 | |
---|
17 | #include <rtems/bspsmp.h> |
---|
18 | |
---|
19 | #include <libcpu/arm-cp15.h> |
---|
20 | |
---|
21 | #include <bsp/irq.h> |
---|
22 | |
---|
23 | int bsp_smp_processor_id(void) |
---|
24 | { |
---|
25 | return (int) arm_cortex_a9_get_multiprocessor_cpu_id(); |
---|
26 | } |
---|
27 | |
---|
28 | static void ipi_handler(void *arg) |
---|
29 | { |
---|
30 | rtems_smp_process_interrupt(); |
---|
31 | } |
---|
32 | |
---|
33 | uint32_t bsp_smp_initialize(uint32_t configured_cpu_count) |
---|
34 | { |
---|
35 | rtems_status_code sc; |
---|
36 | uint32_t max_cpu_count = arm_gic_irq_processor_count(); |
---|
37 | uint32_t used_cpu_count = configured_cpu_count < max_cpu_count ? |
---|
38 | configured_cpu_count : max_cpu_count; |
---|
39 | |
---|
40 | sc = rtems_interrupt_handler_install( |
---|
41 | ARM_GIC_IRQ_SGI_0, |
---|
42 | "IPI", |
---|
43 | RTEMS_INTERRUPT_UNIQUE, |
---|
44 | ipi_handler, |
---|
45 | NULL |
---|
46 | ); |
---|
47 | assert(sc == RTEMS_SUCCESSFUL); |
---|
48 | |
---|
49 | return used_cpu_count; |
---|
50 | } |
---|
51 | |
---|
52 | void bsp_smp_broadcast_interrupt(void) |
---|
53 | { |
---|
54 | /* |
---|
55 | * FIXME: This broadcasts the interrupt also to processors not used by RTEMS. |
---|
56 | */ |
---|
57 | rtems_status_code sc = arm_gic_irq_generate_software_irq( |
---|
58 | ARM_GIC_IRQ_SGI_0, |
---|
59 | ARM_GIC_IRQ_SOFTWARE_IRQ_TO_ALL_EXCEPT_SELF, |
---|
60 | 0xff |
---|
61 | ); |
---|
62 | } |
---|
63 | |
---|
64 | void bsp_smp_interrupt_cpu(int cpu) |
---|
65 | { |
---|
66 | rtems_status_code sc = arm_gic_irq_generate_software_irq( |
---|
67 | ARM_GIC_IRQ_SGI_0, |
---|
68 | ARM_GIC_IRQ_SOFTWARE_IRQ_TO_ALL_IN_LIST, |
---|
69 | (uint8_t) (1U << cpu) |
---|
70 | ); |
---|
71 | } |
---|