1 | /** |
---|
2 | * @file bspstart.c |
---|
3 | * |
---|
4 | * This file contains the GBA BSP startup package. |
---|
5 | * It includes application, board, and monitor specific initialization and |
---|
6 | * configuration. The generic CPU dependent initialization has been |
---|
7 | * performed before this routine is invoked. |
---|
8 | */ |
---|
9 | /* |
---|
10 | * RTEMS GBA BSP |
---|
11 | * |
---|
12 | * Copyright (c) 2004 Markku Puro <markku.puro@kopteri.net> |
---|
13 | * |
---|
14 | * The license and distribution terms for this file may be |
---|
15 | * found in found in the file LICENSE in this distribution or at |
---|
16 | * http://www.rtems.com/license/LICENSE. |
---|
17 | * |
---|
18 | * $Id$ |
---|
19 | */ |
---|
20 | |
---|
21 | #include <stdio.h> |
---|
22 | #include <bsp.h> |
---|
23 | #include <rtems/bspIo.h> |
---|
24 | #include <rtems/libio.h> |
---|
25 | #include <rtems/libcsupport.h> |
---|
26 | #include <gba.h> |
---|
27 | #include <conio.h> |
---|
28 | |
---|
29 | #define BSP_DEBUG 0 |
---|
30 | |
---|
31 | /* Global Variables, Defined in 'linkcmds' */ |
---|
32 | extern void _end; |
---|
33 | extern void _stack_size; |
---|
34 | extern void _irq_max_vector; |
---|
35 | extern void __heap_limit; |
---|
36 | extern void __ro_start; |
---|
37 | extern void __ro_end; |
---|
38 | extern void __data_start; |
---|
39 | extern void __data_end; |
---|
40 | extern void __load_start_data; |
---|
41 | extern void __load_stop_data; |
---|
42 | extern void __ewram_start; |
---|
43 | extern void __ewram_end; |
---|
44 | extern void __load_start_ewram; |
---|
45 | extern void __load_stop_ewram; |
---|
46 | extern void __iwram_start; |
---|
47 | extern void __iwram_end; |
---|
48 | extern void __load_start_iwram; |
---|
49 | extern void __load_stop_iwram; |
---|
50 | extern void __bss_start; |
---|
51 | extern void __bss_end; |
---|
52 | |
---|
53 | /** The original BSP configuration table from the application. */ |
---|
54 | extern rtems_configuration_table Configuration; |
---|
55 | /** Our copy of BSP configuration table from the application. */ |
---|
56 | rtems_configuration_table BSP_Configuration; |
---|
57 | |
---|
58 | /* External Prototypes */ |
---|
59 | extern void bsp_cleanup( void ); |
---|
60 | extern void rtems_irq_mngt_init(void); |
---|
61 | extern void bsp_libc_init( void *, rtems_unsigned32, int ); |
---|
62 | extern void bsp_postdriver_hook(void); |
---|
63 | |
---|
64 | |
---|
65 | /** Chip registers */ |
---|
66 | volatile unsigned int *Regs = (unsigned int *)GBA_IO_REGS_ADDR; |
---|
67 | |
---|
68 | /** |
---|
69 | * Size of heap if it is 0 it will be dynamically defined by memory size, |
---|
70 | * otherwise the value should be changed by binary patch |
---|
71 | */ |
---|
72 | rtems_unsigned32 _heap_size = 0; |
---|
73 | |
---|
74 | /** Address of start of free memory - should be updated after creating new partitions or regions.*/ |
---|
75 | rtems_unsigned32 rtemsFreeMemStart; |
---|
76 | |
---|
77 | /** CPU configuration table. */ |
---|
78 | rtems_cpu_table Cpu_table; |
---|
79 | /** Program name - from main(). */ |
---|
80 | char *rtems_progname; |
---|
81 | |
---|
82 | |
---|
83 | /** |
---|
84 | * @brief BSP pretasking hook. |
---|
85 | * |
---|
86 | * Called just before drivers are initialized. |
---|
87 | * Used to setup libc and install any BSP extensions. |
---|
88 | * |
---|
89 | * NOTE: Must not use libc (to do io) from here, since drivers are not yet initialized. |
---|
90 | * |
---|
91 | * @param None |
---|
92 | * @return None |
---|
93 | */ |
---|
94 | void bsp_pretasking_hook(void) |
---|
95 | { |
---|
96 | |
---|
97 | if (_heap_size == 0) { |
---|
98 | _heap_size = (rtems_unsigned32)&__heap_limit - rtemsFreeMemStart; |
---|
99 | } |
---|
100 | |
---|
101 | bsp_libc_init((void *)rtemsFreeMemStart, _heap_size, 0); |
---|
102 | |
---|
103 | rtemsFreeMemStart += _heap_size; |
---|
104 | |
---|
105 | |
---|
106 | #ifdef RTEMS_DEBUG |
---|
107 | rtems_debug_enable(RTEMS_DEBUG_ALL_MASK); |
---|
108 | #endif /* RTEMS_DEBUG */ |
---|
109 | |
---|
110 | #if BSP_DEBUG |
---|
111 | /* The following information is very useful when debugging. */ |
---|
112 | printk("[bsp_pretasking_hook]\n"); |
---|
113 | printk("_heap_size = 0x%x\n", _heap_size); |
---|
114 | printk("_stack_size = 0x%x\n", (rtems_unsigned32)&_stack_size); |
---|
115 | printk("_irq_max_vector = 0x%x\n", (rtems_unsigned32)&_irq_max_vector); |
---|
116 | printk("__ro_start = 0x%x : __ro_end = 0x%x\n", (rtems_unsigned32)&__ro_start, (rtems_unsigned32)&__ro_end); |
---|
117 | printk("__ewram_start = 0x%x : __ewram_end = 0x%x\n", (rtems_unsigned32)&__ewram_start, (rtems_unsigned32)&__ewram_end); |
---|
118 | printk("__data_start = 0x%x : __data_end = 0x%x\n", (rtems_unsigned32)&__data_start, (rtems_unsigned32)&__data_end); |
---|
119 | printk("__bss_start = 0x%x : __bss_end = 0x%x\n", (rtems_unsigned32)&__bss_start,(rtems_unsigned32)&__bss_end); |
---|
120 | printk("__iwram_start = 0x%x : __iwram_end = 0x%x\n", (rtems_unsigned32)&__iwram_start,(rtems_unsigned32)&__iwram_end); |
---|
121 | printk("__load_start_iwram = 0x%x\n", (rtems_unsigned32)&__load_start_iwram); |
---|
122 | printk("__load_stop_iwram = 0x%x\n", (rtems_unsigned32)&__load_stop_iwram); |
---|
123 | printk("__load_start_ewram = 0x%x\n", (rtems_unsigned32)&__load_start_ewram); |
---|
124 | printk("__load_stop_ewram = 0x%x\n", (rtems_unsigned32)&__load_stop_ewram); |
---|
125 | printk("__load_start_data = 0x%x\n", (rtems_unsigned32)&__load_start_data); |
---|
126 | printk("__load_stop_data = 0x%x\n", (rtems_unsigned32)&__load_stop_data); |
---|
127 | #endif |
---|
128 | } |
---|
129 | |
---|
130 | |
---|
131 | /** |
---|
132 | * @brief BSP Start |
---|
133 | * |
---|
134 | * Called before main is invoked. |
---|
135 | * |
---|
136 | * @param None |
---|
137 | * @return None |
---|
138 | */ |
---|
139 | void bsp_start_default( void ) |
---|
140 | { |
---|
141 | /* set the value of start of free memory. */ |
---|
142 | rtemsFreeMemStart = (rtems_unsigned32)&_end; |
---|
143 | |
---|
144 | /* If we don't have command line arguments set default program name. */ |
---|
145 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
---|
146 | Cpu_table.predriver_hook = NULL; /* use system's */ |
---|
147 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
---|
148 | Cpu_table.idle_task = NULL; /* don't override system IDLE task */ |
---|
149 | Cpu_table.do_zero_of_workspace = TRUE; |
---|
150 | Cpu_table.interrupt_stack_size = 0; |
---|
151 | Cpu_table.extra_mpci_receive_server_stack = 0; |
---|
152 | |
---|
153 | |
---|
154 | /* Place RTEMS workspace at beginning of free memory. */ |
---|
155 | BSP_Configuration.work_space_start = (void *)rtemsFreeMemStart; |
---|
156 | rtemsFreeMemStart += BSP_Configuration.work_space_size; |
---|
157 | |
---|
158 | /* Init conio */ |
---|
159 | gba_textmode(CO60); |
---|
160 | |
---|
161 | /* Init rtems exceptions management */ |
---|
162 | /*!!!!!GBA - Can't use exception vectors in GBA because they are already in GBA ROM BIOS */ |
---|
163 | /* rtems_exception_init_mngt(); */ |
---|
164 | |
---|
165 | /* Init rtems interrupt management */ |
---|
166 | rtems_irq_mngt_init(); |
---|
167 | |
---|
168 | #if BSP_DEBUG |
---|
169 | /* The following information is very useful when debugging. */ |
---|
170 | printk("[bsp_start]\n"); |
---|
171 | printk("rtemsFreeMemStart= 0x%x\n", rtemsFreeMemStart); |
---|
172 | printk("__heap_limit = 0x%x\n", (rtems_unsigned32)&__heap_limit); |
---|
173 | printk("work_space_start = 0x%x size = 0x%x\n", BSP_Configuration.work_space_start,BSP_Configuration.work_space_size); |
---|
174 | printk("maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions); |
---|
175 | printk("microseconds_per_tick = 0x%x\n", BSP_Configuration.microseconds_per_tick); |
---|
176 | printk("ticks_per_timeslice = 0x%x\n", BSP_Configuration.ticks_per_timeslice); |
---|
177 | printk("maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices); |
---|
178 | printk("number_of_device_drivers = 0x%x\n", BSP_Configuration.number_of_device_drivers); |
---|
179 | printk("Device_driver_table = 0x%x\n", BSP_Configuration.Device_driver_table); |
---|
180 | #endif |
---|
181 | |
---|
182 | /* Do we have enough memory */ |
---|
183 | if ((rtems_unsigned32)&__heap_limit < rtemsFreeMemStart) { |
---|
184 | printk("\nFatal Error: Memory overflow[0x%x]!\n",rtemsFreeMemStart); |
---|
185 | bsp_cleanup(); |
---|
186 | } |
---|
187 | |
---|
188 | } |
---|
189 | |
---|
190 | |
---|
191 | /** |
---|
192 | * @brief weak alias for bsp_start_default |
---|
193 | * |
---|
194 | * By making this a weak alias for bsp_start_default, a brave soul |
---|
195 | * can override the actual bsp_start routine used. |
---|
196 | */ |
---|
197 | void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default"))); |
---|