1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup mpc55xx |
---|
5 | * |
---|
6 | * @brief Source file for MPC55XX interrupt support. |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved. |
---|
11 | * |
---|
12 | * embedded brains GmbH |
---|
13 | * Obere Lagerstr. 30 |
---|
14 | * 82178 Puchheim |
---|
15 | * Germany |
---|
16 | * <rtems@embedded-brains.de> |
---|
17 | * |
---|
18 | * The license and distribution terms for this file may be |
---|
19 | * found in the file LICENSE in this distribution or at |
---|
20 | * http://www.rtems.org/license/LICENSE. |
---|
21 | */ |
---|
22 | |
---|
23 | #include <mpc55xx/regs.h> |
---|
24 | |
---|
25 | #include <libcpu/powerpc-utility.h> |
---|
26 | |
---|
27 | #include <bsp/irq.h> |
---|
28 | #include <bsp/vectors.h> |
---|
29 | #include <bsp/irq-generic.h> |
---|
30 | |
---|
31 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
---|
32 | |
---|
33 | #include <rtems/status-checks.h> |
---|
34 | |
---|
35 | /** |
---|
36 | * @brief Returns the priority @a priority of IRQ @a vector from the INTC. |
---|
37 | */ |
---|
38 | rtems_status_code mpc55xx_intc_get_priority( rtems_vector_number vector, unsigned *priority) |
---|
39 | { |
---|
40 | if (MPC55XX_IRQ_IS_VALID( vector)) { |
---|
41 | *priority = INTC.PSR [vector].B.PRI; |
---|
42 | return RTEMS_SUCCESSFUL; |
---|
43 | } else { |
---|
44 | *priority = MPC55XX_INTC_INVALID_PRIORITY; |
---|
45 | return RTEMS_INVALID_NUMBER; |
---|
46 | } |
---|
47 | } |
---|
48 | |
---|
49 | /** |
---|
50 | * @brief Sets the priority of IRQ @a vector to @a priority at the INTC. |
---|
51 | */ |
---|
52 | rtems_status_code mpc55xx_intc_set_priority( rtems_vector_number vector, unsigned priority) |
---|
53 | { |
---|
54 | if (MPC55XX_IRQ_IS_VALID( vector) && MPC55XX_INTC_IS_VALID_PRIORITY( priority)) { |
---|
55 | INTC.PSR [vector].B.PRI = priority; |
---|
56 | if (INTC.PSR [vector].B.PRI == priority) { |
---|
57 | return RTEMS_SUCCESSFUL; |
---|
58 | } else { |
---|
59 | return RTEMS_IO_ERROR; |
---|
60 | } |
---|
61 | } else { |
---|
62 | return RTEMS_INVALID_NUMBER; |
---|
63 | } |
---|
64 | } |
---|
65 | |
---|
66 | /** |
---|
67 | * @brief Raises the software IRQ with number @a vector. |
---|
68 | */ |
---|
69 | rtems_status_code mpc55xx_intc_raise_software_irq( rtems_vector_number vector) |
---|
70 | { |
---|
71 | if (MPC55XX_IRQ_IS_SOFTWARE( vector)) { |
---|
72 | INTC.SSCIR [vector].B.SET = 1; |
---|
73 | return RTEMS_SUCCESSFUL; |
---|
74 | } else { |
---|
75 | return RTEMS_INVALID_NUMBER; |
---|
76 | } |
---|
77 | } |
---|
78 | |
---|
79 | /** |
---|
80 | * @brief Clears the software IRQ with number @a vector. |
---|
81 | */ |
---|
82 | rtems_status_code mpc55xx_intc_clear_software_irq( rtems_vector_number vector) |
---|
83 | { |
---|
84 | if (MPC55XX_IRQ_IS_SOFTWARE( vector)) { |
---|
85 | INTC.SSCIR [vector].B.CLR = 1; |
---|
86 | return RTEMS_SUCCESSFUL; |
---|
87 | } else { |
---|
88 | return RTEMS_INVALID_NUMBER; |
---|
89 | } |
---|
90 | } |
---|
91 | |
---|
92 | /** |
---|
93 | * @brief Installs interrupt handler and sets priority. |
---|
94 | */ |
---|
95 | rtems_status_code mpc55xx_interrupt_handler_install( |
---|
96 | rtems_vector_number vector, |
---|
97 | const char *info, |
---|
98 | rtems_option options, |
---|
99 | unsigned priority, |
---|
100 | rtems_interrupt_handler handler, |
---|
101 | void *arg |
---|
102 | ) |
---|
103 | { |
---|
104 | if (MPC55XX_IRQ_IS_VALID( vector) && MPC55XX_INTC_IS_VALID_PRIORITY( priority)) { |
---|
105 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
106 | |
---|
107 | sc = rtems_interrupt_handler_install( vector, info, options, handler, arg); |
---|
108 | RTEMS_CHECK_SC( sc, "Install interrupt handler"); |
---|
109 | |
---|
110 | return mpc55xx_intc_set_priority( vector, priority); |
---|
111 | } else { |
---|
112 | return RTEMS_INVALID_NUMBER; |
---|
113 | } |
---|
114 | } |
---|
115 | |
---|
116 | void bsp_interrupt_dispatch(uintptr_t exception_number) |
---|
117 | { |
---|
118 | /* Acknowledge interrupt request */ |
---|
119 | rtems_vector_number vector = INTC.IACKR.B.INTVEC; |
---|
120 | |
---|
121 | /* Save machine state and enable external exceptions */ |
---|
122 | uint32_t msr = ppc_external_exceptions_enable(); |
---|
123 | |
---|
124 | /* Dispatch interrupt handlers */ |
---|
125 | bsp_interrupt_handler_dispatch( vector); |
---|
126 | |
---|
127 | /* Restore machine state */ |
---|
128 | ppc_external_exceptions_disable( msr); |
---|
129 | |
---|
130 | /* End of interrupt */ |
---|
131 | INTC.EOIR.R = 1; |
---|
132 | } |
---|
133 | |
---|
134 | rtems_status_code bsp_interrupt_facility_initialize(void) |
---|
135 | { |
---|
136 | rtems_vector_number vector; |
---|
137 | |
---|
138 | /* Initialize interrupt controller */ |
---|
139 | |
---|
140 | /* Disable all interrupts */ |
---|
141 | for (vector = MPC55XX_IRQ_MIN; vector <= MPC55XX_IRQ_MAX; ++vector) { |
---|
142 | INTC.PSR [vector].B.PRI = MPC55XX_INTC_DISABLED_PRIORITY; |
---|
143 | } |
---|
144 | |
---|
145 | /* Software vector mode */ |
---|
146 | INTC.MCR.B.VTES = 0; |
---|
147 | INTC.MCR.B.HVEN = 0; |
---|
148 | |
---|
149 | /* Set current priority to 0 */ |
---|
150 | INTC.CPR.B.PRI = 0; |
---|
151 | |
---|
152 | return RTEMS_SUCCESSFUL; |
---|
153 | } |
---|
154 | |
---|
155 | void bsp_interrupt_vector_enable( rtems_vector_number vector) |
---|
156 | { |
---|
157 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
---|
158 | mpc55xx_intc_set_priority( vector, MPC55XX_INTC_DEFAULT_PRIORITY); |
---|
159 | } |
---|
160 | |
---|
161 | void bsp_interrupt_vector_disable( rtems_vector_number vector) |
---|
162 | { |
---|
163 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
---|
164 | mpc55xx_intc_set_priority( vector, MPC55XX_INTC_DISABLED_PRIORITY); |
---|
165 | } |
---|