1 | /* |
---|
2 | * This set of routines starts the application. It includes application, |
---|
3 | * board, and monitor specific initialization and configuration. |
---|
4 | * The generic CPU dependent initialization has been performed |
---|
5 | * before any of these are invoked. |
---|
6 | * |
---|
7 | * COPYRIGHT (c) 1989-2003. |
---|
8 | * On-Line Applications Research Corporation (OAR). |
---|
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 | * Ported to ERC32 implementation of the SPARC by On-Line Applications |
---|
15 | * Research Corporation (OAR) under contract to the European Space |
---|
16 | * Agency (ESA). |
---|
17 | * |
---|
18 | * ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995. |
---|
19 | * European Space Agency. |
---|
20 | * |
---|
21 | * $Id$ |
---|
22 | */ |
---|
23 | |
---|
24 | /* must be identical to STACK_SIZE in start.S */ |
---|
25 | #define STACK_SIZE 16 * 1024 |
---|
26 | |
---|
27 | #include <string.h> |
---|
28 | |
---|
29 | #include <bsp.h> |
---|
30 | #include <rtems/libio.h> |
---|
31 | #include <rtems/libcsupport.h> |
---|
32 | |
---|
33 | /* |
---|
34 | * The original table from the application and our copy of it with |
---|
35 | * some changes. |
---|
36 | */ |
---|
37 | |
---|
38 | extern rtems_configuration_table Configuration; |
---|
39 | rtems_configuration_table BSP_Configuration; |
---|
40 | |
---|
41 | rtems_cpu_table Cpu_table; |
---|
42 | |
---|
43 | /* |
---|
44 | * Tells us where to put the workspace in case remote debugger is present. |
---|
45 | */ |
---|
46 | |
---|
47 | extern uint32_t rdb_start; |
---|
48 | |
---|
49 | /* |
---|
50 | * Amount to increment itimer by each pass |
---|
51 | * It is a variable instead of a #define to allow the 'looptest' |
---|
52 | * script to bump it without recompiling rtems |
---|
53 | */ |
---|
54 | |
---|
55 | uint32_t CPU_SPARC_CLICKS_PER_TICK; |
---|
56 | |
---|
57 | #if SIMSPARC_FAST_IDLE |
---|
58 | |
---|
59 | /* |
---|
60 | * Many of the tests are very slow on the simulator because they have |
---|
61 | * have 5 second delays hardwired in. |
---|
62 | * |
---|
63 | * Try to speed those tests up by speeding up the clock when in the idle task. |
---|
64 | * |
---|
65 | * NOTE: At the current setting, 5 second delays in the tests take |
---|
66 | * approximately 5 seconds of wall time. |
---|
67 | */ |
---|
68 | |
---|
69 | rtems_extension fast_idle_switch_hook( |
---|
70 | rtems_tcb *current_task, |
---|
71 | rtems_tcb *heir_task |
---|
72 | ) |
---|
73 | { |
---|
74 | static uint32_t normal_clock = ~0; |
---|
75 | static uint32_t fast_clock; |
---|
76 | |
---|
77 | /* init our params on first call */ |
---|
78 | if (normal_clock == ~0) |
---|
79 | { |
---|
80 | normal_clock = CPU_SPARC_CLICKS_PER_TICK; |
---|
81 | fast_clock = CPU_SPARC_CLICKS_PER_TICK / 0x08; |
---|
82 | if (fast_clock == 0) /* handle pathological case */ |
---|
83 | fast_clock++; |
---|
84 | } |
---|
85 | |
---|
86 | /* |
---|
87 | * Run the clock faster when idle is in place. |
---|
88 | */ |
---|
89 | |
---|
90 | if (heir_task == _Thread_Idle) |
---|
91 | CPU_SPARC_CLICKS_PER_TICK = fast_clock; |
---|
92 | else if (current_task == _Thread_Idle) |
---|
93 | CPU_SPARC_CLICKS_PER_TICK = normal_clock; |
---|
94 | } |
---|
95 | |
---|
96 | #endif |
---|
97 | |
---|
98 | /* |
---|
99 | * Use the shared implementations of the following routines |
---|
100 | */ |
---|
101 | |
---|
102 | void bsp_postdriver_hook(void); |
---|
103 | void bsp_libc_init( void *, uint32_t, int ); |
---|
104 | extern void bsp_spurious_initialize(); |
---|
105 | |
---|
106 | /* |
---|
107 | * bsp_pretasking_hook |
---|
108 | * |
---|
109 | * BSP pretasking hook. Called just before drivers are initialized. |
---|
110 | * Used to setup libc and install any BSP extensions. |
---|
111 | */ |
---|
112 | |
---|
113 | void bsp_pretasking_hook(void) |
---|
114 | { |
---|
115 | extern int end; |
---|
116 | uint32_t heap_start; |
---|
117 | uint32_t heap_size; |
---|
118 | |
---|
119 | heap_start = (uint32_t) &end; |
---|
120 | if (heap_start & (CPU_ALIGNMENT-1)) |
---|
121 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
---|
122 | |
---|
123 | heap_size = BSP_Configuration.work_space_start - (void *)&end - STACK_SIZE; |
---|
124 | heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */ |
---|
125 | |
---|
126 | bsp_libc_init((void *) heap_start, heap_size, 0); |
---|
127 | |
---|
128 | #if SIMSPARC_FAST_IDLE |
---|
129 | /* |
---|
130 | * Install the fast idle task switch extension |
---|
131 | * |
---|
132 | * On MP systems, might not want to do this; it confuses at least |
---|
133 | * one test (mp06) if the simulators are running too far from real time. |
---|
134 | */ |
---|
135 | |
---|
136 | #if 0 |
---|
137 | if (BSP_Configuration.User_multiprocessing_table == 0) |
---|
138 | #endif |
---|
139 | { |
---|
140 | rtems_extensions_table fast_idle_extension; |
---|
141 | rtems_id extension_id; |
---|
142 | rtems_status_code rc; |
---|
143 | |
---|
144 | memset(&fast_idle_extension, 0, sizeof(fast_idle_extension)); |
---|
145 | |
---|
146 | fast_idle_extension.thread_switch = fast_idle_switch_hook; |
---|
147 | |
---|
148 | rc = rtems_extension_create( |
---|
149 | rtems_build_name('F', 'D', 'L', 'E'), |
---|
150 | &fast_idle_extension, |
---|
151 | &extension_id |
---|
152 | ); |
---|
153 | if (rc != RTEMS_SUCCESSFUL) |
---|
154 | rtems_fatal_error_occurred(rc); |
---|
155 | } |
---|
156 | #endif |
---|
157 | |
---|
158 | #ifdef RTEMS_DEBUG |
---|
159 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
---|
160 | #endif |
---|
161 | |
---|
162 | bsp_spurious_initialize(); |
---|
163 | } |
---|
164 | |
---|
165 | /* |
---|
166 | * bsp_start |
---|
167 | * |
---|
168 | * This routine does the bulk of the system initialization. |
---|
169 | */ |
---|
170 | |
---|
171 | void bsp_start( void ) |
---|
172 | { |
---|
173 | unsigned char *work_space_start; |
---|
174 | |
---|
175 | /* |
---|
176 | * Set up our hooks |
---|
177 | * Make sure libc_init is done before drivers initialized so that |
---|
178 | * they can use atexit() |
---|
179 | */ |
---|
180 | |
---|
181 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
---|
182 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
---|
183 | |
---|
184 | /* |
---|
185 | * SIS does zero out memory BUT only when IT begins execution. Thus |
---|
186 | * if we want to have a clean slate in the workspace each time we |
---|
187 | * begin execution of OUR application, then we must zero the workspace. |
---|
188 | */ |
---|
189 | Cpu_table.do_zero_of_workspace = TRUE; |
---|
190 | |
---|
191 | /* |
---|
192 | * This should be enough interrupt stack. |
---|
193 | */ |
---|
194 | |
---|
195 | Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; |
---|
196 | |
---|
197 | work_space_start = |
---|
198 | (unsigned char *)rdb_start - BSP_Configuration.work_space_size; |
---|
199 | |
---|
200 | if ( work_space_start <= (unsigned char *)&end ) { |
---|
201 | DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); |
---|
202 | BSP_fatal_return(); |
---|
203 | } |
---|
204 | |
---|
205 | BSP_Configuration.work_space_start = work_space_start; |
---|
206 | |
---|
207 | #if SIMSPARC_FAST_IDLE |
---|
208 | /* |
---|
209 | * Add 1 extension for fast idle |
---|
210 | */ |
---|
211 | |
---|
212 | BSP_Configuration.maximum_extensions++; |
---|
213 | #endif |
---|
214 | |
---|
215 | /* |
---|
216 | * Add 1 extension for MPCI_fatal |
---|
217 | */ |
---|
218 | |
---|
219 | if (BSP_Configuration.User_multiprocessing_table) |
---|
220 | BSP_Configuration.maximum_extensions++; |
---|
221 | |
---|
222 | /* |
---|
223 | * Set the "clicks per tick" for the simulator |
---|
224 | * used by XXX/clock/clock.c to schedule interrupts |
---|
225 | */ |
---|
226 | |
---|
227 | CPU_SPARC_CLICKS_PER_TICK = BSP_Configuration.microseconds_per_tick; |
---|
228 | } |
---|