Mercurial > nand-ecoscentric

annotate packages/kernel/current/include/smp.hxx @ 3403:8c8767bb9a62 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
devs/nand/micron_mt29: Remove defunct references (in comments) to mt29f2g08_oob_ecc.
author Ross Younger <wry@ecoscentric.com>
date Sun, 18 Jan 2015 17:59:01 +1300
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
1 #ifndef CYGONCE_KERNEL_SMP_HXX
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
2 #define CYGONCE_KERNEL_SMP_HXX
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
3
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
4 //==========================================================================
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
5 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
6 // smp.hxx
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
7 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
8 // SMP kernel support
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
9 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
10 //==========================================================================
2729
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
11 // ####ECOSGPLCOPYRIGHTBEGIN####
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
12 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
13 // This file is part of eCos, the Embedded Configurable Operating System.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 182
diff changeset
15 //
2729
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
16 // eCos is free software; you can redistribute it and/or modify it under
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
17 // the terms of the GNU General Public License as published by the Free
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
18 // Software Foundation; either version 2 or (at your option) any later
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
19 // version.
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 182
diff changeset
20 //
2729
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
21 // eCos is distributed in the hope that it will be useful, but WITHOUT
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
22 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
23 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
24 // for more details.
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 182
diff changeset
25 //
2729
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
26 // You should have received a copy of the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
27 // along with eCos; if not, write to the Free Software Foundation, Inc.,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
28 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 182
diff changeset
29 //
2729
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
30 // As a special exception, if other files instantiate templates or use
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
31 // macros or inline functions from this file, or you compile this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
32 // and link it with other works to produce a work based on this file,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
33 // this file does not by itself cause the resulting work to be covered by
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
34 // the GNU General Public License. However the source code for this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
35 // must still be made available in accordance with section (3) of the GNU
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
36 // General Public License v2.
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 182
diff changeset
37 //
2729
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
38 // This exception does not invalidate any other reasons why a work based
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
39 // on this file might be covered by the GNU General Public License.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
40 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
jlarmour
parents: 210
diff changeset
41 // ####ECOSGPLCOPYRIGHTEND####
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
42 //==========================================================================
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
43 //#####DESCRIPTIONBEGIN####
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
44 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
45 // Author(s): nickg
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
46 // Contributors:nickg
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
47 // Date: 2001-02-10
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
48 // Purpose: Kernel SMP support
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
49 // Description: If SMP support is configured into the kernel, then this file
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
50 // translates HAL defined macros into C and C++ classes and methods
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
51 // that can be called from the rest of the kernel. If SMP is not
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
52 // configured in, then the same classes and methods are defined here
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
53 // to operate correctly in a single CPU configuration.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
54 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
55 // Usage: #include <cyg/kernel/smp.hxx>
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
56 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
57 //####DESCRIPTIONEND####
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
58 //
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
59 //==========================================================================
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
60
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
61 #include <cyg/kernel/ktypes.h>
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
62 #include <cyg/infra/cyg_ass.h> // assertion macros
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
63
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
64 #include <cyg/hal/hal_intr.h> // HAL_DISABLE_INTERRUPTS() etc.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
65
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
66 #include <cyg/kernel/instrmnt.h>
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
67
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
68 //==========================================================================
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
69
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
70 #if defined(CYGPKG_KERNEL_SMP_SUPPORT) && (CYGPKG_HAL_SMP_SUPPORT)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
71
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
72 //==========================================================================
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
73 // SMP support is included
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
74
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
75 #define CYG_KERNEL_SMP_ENABLED
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
76
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
77 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
78 // Get HAL support
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
79
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
80 #include <cyg/hal/hal_smp.h>
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
81
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
82 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
83 // Defined values
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
84 // These all just map straight through to the HAL.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
85
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
86 #define CYGNUM_KERNEL_CPU_MAX HAL_SMP_CPU_MAX
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
87
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
88 #define CYG_KERNEL_CPU_COUNT() HAL_SMP_CPU_COUNT()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
89
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
90 #define CYG_KERNEL_CPU_THIS() HAL_SMP_CPU_THIS()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
91
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
92 #define CYG_KERNEL_CPU_NONE HAL_SMP_CPU_NONE
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
93
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
94 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
95 // CPU control
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
96
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
97 #define CYG_KERNEL_CPU_START( __cpu ) HAL_SMP_CPU_START( __cpu )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
98
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
99 #define CYG_KERNEL_CPU_RESCHEDULE_INTERRUPT( __cpu, __wait ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
100 HAL_SMP_CPU_RESCHEDULE_INTERRUPT( __cpu, __wait )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
101
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
102 #define CYG_KERNEL_CPU_TIMESLICE_INTERRUPT( __cpu, __wait ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
103 HAL_SMP_CPU_TIMESLICE_INTERRUPT( __cpu, __wait )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
104
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
105 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
106 // Scheduler lock default implementation.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
107
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
108 // This implementation should serve for most targets. However, some
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
109 // targets may have hardware or other features that make simple
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
110 // spinlocks impossible, or allow us to implement the scheduler lock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
111 // in a more efficient manner. If that is the case then the HAL will
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
112 // implement these macros itself.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
113
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
114 #ifndef HAL_SMP_SCHEDLOCK_DATA_TYPE
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
115
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
116 #define HAL_SMP_SCHEDLOCK_DATA_TYPE struct hal_smp_schedlock_data_type
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
117
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
118 struct hal_smp_schedlock_data_type {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
119 HAL_SPINLOCK_TYPE spinlock;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
120 volatile HAL_SMP_CPU_TYPE holder;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
121 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
122
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
123 #define HAL_SMP_SCHEDLOCK_INIT( __lock, __data ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
124 CYG_MACRO_START \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
125 { \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
126 __lock = 1; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
127 HAL_SPINLOCK_CLEAR(__data.spinlock); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
128 HAL_SPINLOCK_SPIN(__data.spinlock); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
129 __data.holder = HAL_SMP_CPU_THIS(); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
130 } \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
131 CYG_MACRO_END
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
132
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
133
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
134 #define HAL_SMP_SCHEDLOCK_INC( __lock, __data ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
135 CYG_MACRO_START \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
136 { \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
137 CYG_INTERRUPT_STATE __state; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
138 HAL_DISABLE_INTERRUPTS(__state); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
139 if( __data.holder == HAL_SMP_CPU_THIS() ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
140 __lock++; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
141 else \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
142 { \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
143 CYG_INSTRUMENT_SMP(LOCK_WAIT,CYG_KERNEL_CPU_THIS(),0); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
144 HAL_SPINLOCK_SPIN(__data.spinlock); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
145 __data.holder = HAL_SMP_CPU_THIS(); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
146 __lock++; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
147 CYG_INSTRUMENT_SMP(LOCK_GOT,CYG_KERNEL_CPU_THIS(),0); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
148 } \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
149 HAL_RESTORE_INTERRUPTS(__state); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
150 } \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
151 CYG_MACRO_END
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
152
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
153 #define HAL_SMP_SCHEDLOCK_ZERO( __lock, __data ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
154 CYG_MACRO_START \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
155 { \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
156 CYG_INTERRUPT_STATE __state; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
157 HAL_DISABLE_INTERRUPTS(__state); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
158 CYG_ASSERT( __data.holder == HAL_SMP_CPU_THIS(), "Zeroing schedlock not owned by me!"); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
159 __lock = 0; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
160 __data.holder = HAL_SMP_CPU_NONE; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
161 HAL_SPINLOCK_CLEAR(__data.spinlock); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
162 HAL_RESTORE_INTERRUPTS(__state); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
163 } \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
164 CYG_MACRO_END
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
165
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
166 #define HAL_SMP_SCHEDLOCK_SET( __lock, __data, __new ) \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
167 CYG_MACRO_START \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
168 { \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
169 CYG_ASSERT( __data.holder == HAL_SMP_CPU_THIS(), "Setting schedlock not owned by me!"); \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
170 __lock = __new; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
171 } \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
172 CYG_MACRO_END
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
173
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
174 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
175
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
176 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
177 // SpinLock class
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
178 // This class supplies a C++ wrapper for the HAL spinlock API.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
179
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
180 #ifdef __cplusplus
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
181
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
182 #ifdef HAL_SPINLOCK_SPIN
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
183
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
184 class Cyg_SpinLock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
185 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
186 HAL_SPINLOCK_TYPE lock;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
187
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
188 public:
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
189
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
190 // Constructor, initialize the lock to clear
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
191 Cyg_SpinLock() { lock = HAL_SPINLOCK_INIT_CLEAR; };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
192
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
193 ~Cyg_SpinLock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
194 {
178
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
195 // CYG_ASSERT( !test(), "spinlock still claimed");
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
196 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
197
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
198 // Spin on the lock.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
199 void spin()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
200 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
201 HAL_SPINLOCK_SPIN(lock);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
202 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
203
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
204 // Clear the lock.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
205 void clear()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
206 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
207 HAL_SPINLOCK_CLEAR(lock);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
208 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
209
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
210 // Try to claim the lock. Return true if successful, false if not.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
211 cyg_bool trylock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
212 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
213 cyg_bool testval;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
214 HAL_SPINLOCK_TRY(lock,testval);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
215 return testval;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
216 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
217
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
218 // Test the current value of the lock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
219 cyg_bool test()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
220 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
221 cyg_bool testval;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
222 HAL_SPINLOCK_TEST(lock, testval);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
223 return testval;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
224 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
225
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
226
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
227 // The following two member functions are only necessary if the
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
228 // spinlock is to be used in an ISR.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
229
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
230 // Claim the spinlock, but also mask this CPU's interrupts while
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
231 // we have it.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
232 void spin_intsave(CYG_INTERRUPT_STATE *state)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
233 {
178
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
234 CYG_INTERRUPT_STATE s;
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
235 HAL_DISABLE_INTERRUPTS(s);
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
236 *state = s;
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
237 spin();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
238 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
239
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
240 // Clear the lock, and restore the interrupt state saved in
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
241 // spin_intsave().
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
242 void clear_intsave(CYG_INTERRUPT_STATE state)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
243 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
244 clear();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
245 HAL_RESTORE_INTERRUPTS(state);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
246 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
247 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
248
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
249 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
250
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
251 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
252 // Scheduler lock class
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
253 // This uses the scheduler lock API defined by the HAL, or the defaults
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
254 // defined above.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
255
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
256 class Cyg_Scheduler_SchedLock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
257 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
258 static volatile cyg_ucount32 sched_lock // lock counter
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
259 CYGBLD_ATTRIB_ASM_ALIAS( cyg_scheduler_sched_lock )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
260 CYGBLD_ANNOTATE_VARIABLE_SCHED
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
261 ;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
262
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
263 static HAL_SMP_SCHEDLOCK_DATA_TYPE lock_data
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
264 CYGBLD_ANNOTATE_VARIABLE_SCHED;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
265
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
266 protected:
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
267
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
268 Cyg_Scheduler_SchedLock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
269 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
270 HAL_SMP_SCHEDLOCK_INIT( sched_lock, lock_data );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
271 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
272
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
273 // Increment the scheduler lock. If this takes the lock from zero
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
274 // to one then this code must also do whatever is necessary to
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
275 // serialize CPUs through the scheduler.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
276 static void inc_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
277 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
278 CYG_INSTRUMENT_SMP(LOCK_INC,CYG_KERNEL_CPU_THIS(),0);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
279 HAL_SMP_SCHEDLOCK_INC( sched_lock, lock_data );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
280 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
281
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
282 // Zero the scheduler lock. This will release the CPU serializing
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
283 // lock and allow another CPU in.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
284 static void zero_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
285 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
286 CYG_INSTRUMENT_SMP(LOCK_ZERO,CYG_KERNEL_CPU_THIS(),0);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
287 CYG_ASSERT( sched_lock != 0, "Scheduler lock already zero");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
288 HAL_SMP_SCHEDLOCK_ZERO( sched_lock, lock_data );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
289 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
290
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
291 // Set the scheduler lock to a non-zero value. Both the scheduler
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
292 // lock and the new value must be non-zero.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
293 static void set_sched_lock(cyg_uint32 new_lock)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
294 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
295 CYG_INSTRUMENT_SMP(LOCK_SET,CYG_KERNEL_CPU_THIS(),new_lock);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
296 CYG_ASSERT( new_lock > 0, "New scheduler lock value == 0");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
297 CYG_ASSERT( sched_lock > 0, "Scheduler lock == 0");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
298 HAL_SMP_SCHEDLOCK_SET( sched_lock, lock_data, new_lock );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
299 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
300
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
301 static cyg_ucount32 get_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
302 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
303 return sched_lock;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
304 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
305 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
306
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
307 #define CYGIMP_KERNEL_SCHED_LOCK_DEFINITIONS \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
308 volatile cyg_ucount32 Cyg_Scheduler_SchedLock::sched_lock = 1; \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
309 HAL_SMP_SCHEDLOCK_DATA_TYPE Cyg_Scheduler_SchedLock::lock_data;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
310
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
311 #endif // __cplusplus
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
312
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
313 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
314
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
315 #else // defined(CYGSEM_KERNEL_SMP_SUPPORT) && (CYGSEM_HAL_SMP_SUPPORT)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
316
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
317 //==========================================================================
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
318 // SMP support is NOT included.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
319
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
320 #undef CYG_KERNEL_SMP_ENABLED
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
321
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
322 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
323 // Defined values
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
324 // Supply a set of values that describe a single CPU system.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
325
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
326 #ifndef HAL_SMP_CPU_TYPE
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
327 #define HAL_SMP_CPU_TYPE cyg_uint32
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
328 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
329
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
330 #define CYGNUM_KERNEL_CPU_MAX 1
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
331
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
332 #define CYG_KERNEL_CPU_COUNT() 1
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
333
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
334 #define CYG_KERNEL_CPU_THIS() 0
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
335
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
336 #define CYG_KERNEL_CPU_NONE -1
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
337
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
338 #define CYG_KERNEL_CPU_LOWPRI() CYG_KERNEL_CPU_THIS()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
339
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
340 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
341 // SpinLock class
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
342 // This single CPU version simply goes through the motions of setting
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
343 // and clearing the lock variable for debugging purposes.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
344
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
345 #ifdef __cplusplus
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
346
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
347 class Cyg_SpinLock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
348 {
182
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST
jlarmour
parents: 178
diff changeset
349 volatile cyg_uint32 lock;
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
350
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
351 public:
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
352
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
353 // Constructor, initialize the lock to clear
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
354 Cyg_SpinLock() { lock = 0; };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
355
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
356 ~Cyg_SpinLock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
357 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
358 CYG_ASSERT( lock == 0, "spinlock still claimed");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
359 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
360
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
361 // Spin on the lock. In this case we just set it to 1 and proceed.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
362 void spin()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
363 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
364 CYG_ASSERT( lock == 0, "spinlock already claimed!");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
365 lock = 1;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
366 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
367
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
368 // Clear the lock. Again, just set the value.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
369 void clear()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
370 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
371 CYG_ASSERT( lock != 0, "spinlock already cleared!");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
372 lock = 0;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
373 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
374
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
375 // Try to claim the lock. Return true if successful, false if not.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
376 cyg_bool trylock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
377 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
378 if( lock ) return false;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
379 else { lock = 1; return true; }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
380 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
381
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
382 // Test the current value of the lock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
383 cyg_bool test() { return lock; };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
384
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
385
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
386 // The following two member functions are only necessary if the
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
387 // spinlock is to be used in an ISR.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
388
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
389 // Claim the spinlock, but also mask this CPU's interrupts while
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
390 // we have it.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
391 void spin_intsave(CYG_INTERRUPT_STATE *state)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
392 {
178
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
393 CYG_INTERRUPT_STATE s;
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
394 HAL_DISABLE_INTERRUPTS(s);
aa8364213009 Merge from eCos master repository on 2001-08-15-01:50:29-BST
jlarmour
parents: 177
diff changeset
395 *state = s;
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
396 spin();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
397 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
398
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
399 // Clear the lock, and restore the interrupt state saved in
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
400 // spin_intsave().
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
401 void clear_intsave(CYG_INTERRUPT_STATE state)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
402 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
403 clear();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
404 HAL_RESTORE_INTERRUPTS(state);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
405 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
406
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
407 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
408
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
409 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
410 // Scheduler lock class
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
411
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
412 class Cyg_Scheduler_SchedLock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
413 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
414 static volatile cyg_ucount32 sched_lock // lock counter
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
415 CYGBLD_ATTRIB_ASM_ALIAS( cyg_scheduler_sched_lock )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
416 CYGBLD_ANNOTATE_VARIABLE_SCHED
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
417 ;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
418
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
419 // For non-SMP versions, the code here does the basic and obvious things.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
420 protected:
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
421
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
422 Cyg_Scheduler_SchedLock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
423 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
424 sched_lock = 1;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
425 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
426
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
427 // Increment the scheduler lock, possibly taking it from zero to
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
428 // one.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
429 static void inc_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
430 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
431 sched_lock++;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
432 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
433
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
434 static void zero_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
435 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
436 CYG_ASSERT( sched_lock != 0, "Scheduler lock already zero");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
437 sched_lock = 0;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
438 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
439
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
440 // Set the scheduler lock to a non-zero value. Both the scheduler
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
441 // lock and the new value must be non-zero.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
442 static void set_sched_lock(cyg_uint32 new_lock)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
443 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
444 CYG_ASSERT( new_lock > 0, "New scheduler lock value == 0");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
445 CYG_ASSERT( sched_lock > 0, "Scheduler lock == 0");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
446 sched_lock = new_lock;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
447 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
448
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
449 static cyg_ucount32 get_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
450 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
451 return sched_lock;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
452 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
453 };
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
454
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
455 #define CYGIMP_KERNEL_SCHED_LOCK_DEFINITIONS \
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
456 volatile cyg_ucount32 Cyg_Scheduler_SchedLock::sched_lock = 1;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
457
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
458 #endif // __cplusplus
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
459
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
460 #endif // defined(CYGSEM_KERNEL_SMP_SUPPORT) && (CYGSEM_HAL_SMP_SUPPORT)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
461
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
462 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
463 #endif // ifndef CYGONCE_KERNEL_SMP_HXX
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
464
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
jlarmour
parents:
diff changeset
465 // EOF smp.hxx