1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsPowerPC
*
* @brief Generic Interrupt suppoer
*/
/*
* Copyright (C) 2021 Chris Johns. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <rtems.h>
#include <stdlib.h>
#include <rtems/bspIo.h> /* for printk */
#include <libcpu/spr.h>
#include <bsp/irq_supp.h>
#include <bsp/irq-generic.h>
#include <bsp/vectors.h>
SPR_RW(BOOKE_TSR)
SPR_RW(PPC405_TSR)
/* legacy mode for bookE DEC exception;
* to avoid the double layer of function calls
* (dec_handler_bookE -> C_dispatch_irq_handler -> user handler)
* it is preferrable for the user to hook the DEC
* exception directly.
* However, the legacy mode works with less modifications
* of user code.
*/
static int C_dispatch_dec_handler_bookE (BSP_Exception_frame *frame, unsigned int excNum)
{
/* clear interrupt; we must do this
* before C_dispatch_irq_handler()
* re-enables MSR_EE.
* Note that PPC405 uses a different SPR# for TSR
*/
if (ppc_cpu_is_bookE()==PPC_BOOKE_405)
_write_PPC405_TSR( BOOKE_TSR_DIS );
else
_write_BOOKE_TSR( BOOKE_TSR_DIS );
return C_dispatch_irq_handler(frame, ASM_DEC_VECTOR);
}
/*
* RTEMS Global Interrupt Handler Management Routines
*/
int BSP_rtems_irq_generic_set(rtems_irq_global_settings* config)
{
int r;
r = BSP_setup_the_pic(config);
if (!r)
return r;
ppc_exc_set_handler(ASM_EXT_VECTOR, C_dispatch_irq_handler);
if ( ppc_cpu_is_bookE() ) {
/* bookE decrementer interrupt needs to be cleared BEFORE
* dispatching the user ISR (because the user ISR is called
* with EE enabled)
* We do this so that existing DEC handlers can be used
* with minor modifications.
*/
ppc_exc_set_handler(ASM_BOOKE_DEC_VECTOR, C_dispatch_dec_handler_bookE);
} else {
ppc_exc_set_handler(ASM_DEC_VECTOR, C_dispatch_irq_handler);
}
return 1;
}
void bsp_interrupt_vector_enable(rtems_vector_number vector)
{
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
BSP_enable_irq_at_pic(vector);
}
void bsp_interrupt_vector_disable(rtems_vector_number vector)
{
bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
BSP_disable_irq_at_pic(vector);
}
rtems_status_code bsp_interrupt_facility_initialize(void)
{
/*
* Initialize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
return RTEMS_SUCCESSFUL;
}
|