[acc25ee] | 1 | /* |
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| 2 | * This routine starts the application. It includes application, |
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| 3 | * board, and monitor specific initialization and configuration. |
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| 4 | * The generic CPU dependent initialization has been performed |
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| 5 | * before this routine is invoked. |
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| 6 | * |
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| 7 | * COPYRIGHT (c) 1989-1998. |
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| 8 | * On-Line Applications Research Corporation (OAR). |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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[e831de8] | 12 | * http://www.rtems.com/license/LICENSE. |
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[acc25ee] | 13 | * |
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| 14 | * Modified to support the MCP750. |
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| 15 | * Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr |
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| 16 | * |
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| 17 | * $Id$ |
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| 18 | */ |
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| 19 | |
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| 20 | #include <string.h> |
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[eba2e4f] | 21 | |
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| 22 | #include <rtems/libio.h> |
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| 23 | #include <rtems/libcsupport.h> |
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[acc25ee] | 24 | #include <bsp/consoleIo.h> |
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| 25 | #include <libcpu/spr.h> |
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| 26 | #include <bsp/residual.h> |
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| 27 | #include <bsp/pci.h> |
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| 28 | #include <bsp/openpic.h> |
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| 29 | #include <bsp/irq.h> |
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[4f3e4f33] | 30 | #include <bsp/VME.h> |
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[acc25ee] | 31 | #include <bsp.h> |
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| 32 | #include <libcpu/bat.h> |
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[4f3e4f33] | 33 | #include <libcpu/pte121.h> |
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[70f1268d] | 34 | #include <libcpu/cpuIdent.h> |
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[acc25ee] | 35 | #include <bsp/vectors.h> |
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| 36 | #include <bsp/motorola.h> |
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| 37 | |
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| 38 | extern void _return_to_ppcbug(); |
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[64f8ae4] | 39 | extern unsigned long __rtems_end[]; |
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[acc25ee] | 40 | extern void L1_caches_enables(); |
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| 41 | extern unsigned get_L2CR(); |
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| 42 | extern void set_L2CR(unsigned); |
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| 43 | extern void bsp_cleanup(void); |
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[4f3e4f33] | 44 | extern Triv121PgTbl BSP_pgtbl_setup(); |
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| 45 | extern void BSP_pgtbl_activate(); |
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| 46 | extern void BSP_vme_config(); |
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| 47 | |
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[ec821af] | 48 | SPR_RW(SPRG0) |
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| 49 | SPR_RW(SPRG1) |
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[4f3e4f33] | 50 | |
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[acc25ee] | 51 | /* |
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| 52 | * Copy of residuals passed by firmware |
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| 53 | */ |
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| 54 | RESIDUAL residualCopy; |
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| 55 | /* |
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| 56 | * Copy Additional boot param passed by boot loader |
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| 57 | */ |
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| 58 | #define MAX_LOADER_ADD_PARM 80 |
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| 59 | char loaderParam[MAX_LOADER_ADD_PARM]; |
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| 60 | /* |
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| 61 | * Vital Board data Start using DATA RESIDUAL |
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| 62 | */ |
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| 63 | /* |
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| 64 | * Total memory using RESIDUAL DATA |
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| 65 | */ |
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| 66 | unsigned int BSP_mem_size; |
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| 67 | /* |
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| 68 | * PCI Bus Frequency |
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| 69 | */ |
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| 70 | unsigned int BSP_bus_frequency; |
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| 71 | /* |
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| 72 | * processor clock frequency |
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| 73 | */ |
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| 74 | unsigned int BSP_processor_frequency; |
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| 75 | /* |
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| 76 | * Time base divisior (how many tick for 1 second). |
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| 77 | */ |
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| 78 | unsigned int BSP_time_base_divisor; |
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| 79 | /* |
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| 80 | * system init stack and soft ir stack size |
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| 81 | */ |
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| 82 | #define INIT_STACK_SIZE 0x1000 |
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[df49c60] | 83 | #define INTR_STACK_SIZE CONFIGURE_INTERRUPT_STACK_MEMORY |
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[acc25ee] | 84 | |
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| 85 | void BSP_panic(char *s) |
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| 86 | { |
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[ef99210e] | 87 | printk("%s PANIC %s\n",_RTEMS_version, s); |
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| 88 | __asm__ __volatile ("sc"); |
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[acc25ee] | 89 | } |
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| 90 | |
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| 91 | void _BSP_Fatal_error(unsigned int v) |
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| 92 | { |
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[ef99210e] | 93 | printk("%s PANIC ERROR %x\n",_RTEMS_version, v); |
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| 94 | __asm__ __volatile ("sc"); |
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[acc25ee] | 95 | } |
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| 96 | |
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| 97 | /* |
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| 98 | * The original table from the application and our copy of it with |
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| 99 | * some changes. |
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| 100 | */ |
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| 101 | |
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| 102 | extern rtems_configuration_table Configuration; |
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| 103 | |
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| 104 | rtems_configuration_table BSP_Configuration; |
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| 105 | |
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| 106 | rtems_cpu_table Cpu_table; |
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| 107 | |
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| 108 | char *rtems_progname; |
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| 109 | |
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| 110 | /* |
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| 111 | * Use the shared implementations of the following routines |
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| 112 | */ |
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| 113 | |
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| 114 | void bsp_postdriver_hook(void); |
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[bde7f268] | 115 | void bsp_libc_init( void *, uint32_t, int ); |
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[acc25ee] | 116 | |
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| 117 | /* |
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| 118 | * Function: bsp_pretasking_hook |
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| 119 | * Created: 95/03/10 |
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| 120 | * |
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| 121 | * Description: |
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| 122 | * BSP pretasking hook. Called just before drivers are initialized. |
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| 123 | * Used to setup libc and install any BSP extensions. |
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| 124 | * |
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| 125 | * NOTES: |
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| 126 | * Must not use libc (to do io) from here, since drivers are |
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| 127 | * not yet initialized. |
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| 128 | * |
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| 129 | */ |
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| 130 | |
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| 131 | void bsp_pretasking_hook(void) |
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| 132 | { |
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[bde7f268] | 133 | uint32_t heap_start; |
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| 134 | uint32_t heap_size; |
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| 135 | uint32_t heap_sbrk_spared; |
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| 136 | extern uint32_t _bsp_sbrk_init(uint32_t, uint32_t*); |
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[acc25ee] | 137 | |
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[bde7f268] | 138 | heap_start = ((uint32_t) __rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE; |
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[acc25ee] | 139 | if (heap_start & (CPU_ALIGNMENT-1)) |
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| 140 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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| 141 | |
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| 142 | heap_size = (BSP_mem_size - heap_start) - BSP_Configuration.work_space_size; |
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| 143 | |
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[92b67b18] | 144 | heap_sbrk_spared=_bsp_sbrk_init(heap_start, &heap_size); |
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| 145 | |
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[acc25ee] | 146 | #ifdef SHOW_MORE_INIT_SETTINGS |
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[92b67b18] | 147 | printk(" HEAP start %x size %x (%x bytes spared for sbrk)\n", heap_start, heap_size, heap_sbrk_spared); |
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[acc25ee] | 148 | #endif |
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[92b67b18] | 149 | |
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| 150 | bsp_libc_init((void *) 0, heap_size, heap_sbrk_spared); |
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| 151 | |
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[acc25ee] | 152 | |
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| 153 | #ifdef RTEMS_DEBUG |
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| 154 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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| 155 | #endif |
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| 156 | } |
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| 157 | |
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| 158 | void zero_bss() |
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| 159 | { |
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[64f8ae4] | 160 | /* prevent these from being accessed in the short data areas */ |
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| 161 | extern unsigned long __bss_start[], __SBSS_START__[], __SBSS_END__[]; |
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| 162 | extern unsigned long __SBSS2_START__[], __SBSS2_END__[]; |
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| 163 | memset(__SBSS_START__, 0, ((unsigned) __SBSS_END__) - ((unsigned)__SBSS_START__)); |
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| 164 | memset(__SBSS2_START__, 0, ((unsigned) __SBSS2_END__) - ((unsigned)__SBSS2_START__)); |
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| 165 | memset(__bss_start, 0, ((unsigned) __rtems_end) - ((unsigned)__bss_start)); |
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[acc25ee] | 166 | } |
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| 167 | |
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| 168 | void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options) |
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| 169 | { |
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| 170 | |
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| 171 | residualCopy = *r3; |
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| 172 | strncpy(loaderParam, additional_boot_options, MAX_LOADER_ADD_PARM); |
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| 173 | loaderParam[MAX_LOADER_ADD_PARM - 1] ='\0'; |
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| 174 | } |
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| 175 | |
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| 176 | /* |
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| 177 | * bsp_start |
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| 178 | * |
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| 179 | * This routine does the bulk of the system initialization. |
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| 180 | */ |
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| 181 | |
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| 182 | void bsp_start( void ) |
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| 183 | { |
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| 184 | int err; |
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| 185 | unsigned char *stack; |
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| 186 | unsigned l2cr; |
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| 187 | register unsigned char* intrStack; |
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| 188 | unsigned char *work_space_start; |
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| 189 | ppc_cpu_id_t myCpu; |
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| 190 | ppc_cpu_revision_t myCpuRevision; |
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| 191 | prep_t boardManufacturer; |
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| 192 | motorolaBoard myBoard; |
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[4f3e4f33] | 193 | Triv121PgTbl pt=0; |
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[acc25ee] | 194 | /* |
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| 195 | * Get CPU identification dynamically. Note that the get_ppc_cpu_type() function |
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| 196 | * store the result in global variables so that it can be used latter... |
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| 197 | */ |
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| 198 | myCpu = get_ppc_cpu_type(); |
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| 199 | myCpuRevision = get_ppc_cpu_revision(); |
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| 200 | /* |
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| 201 | * enables L1 Cache. Note that the L1_caches_enables() codes checks for |
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| 202 | * relevant CPU type so that the reason why there is no use of myCpu... |
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| 203 | */ |
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| 204 | L1_caches_enables(); |
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| 205 | /* |
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| 206 | * Enable L2 Cache. Note that the set_L2CR(L2CR) codes checks for |
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| 207 | * relevant CPU type (mpc750)... |
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| 208 | */ |
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| 209 | l2cr = get_L2CR(); |
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| 210 | #ifdef SHOW_LCR2_REGISTER |
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| 211 | printk("Initial L2CR value = %x\n", l2cr); |
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| 212 | #endif |
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| 213 | if ( (! (l2cr & 0x80000000)) && ((int) l2cr == -1)) |
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| 214 | set_L2CR(0xb9A14000); |
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| 215 | /* |
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| 216 | * the initial stack has aready been set to this value in start.S |
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| 217 | * so there is no need to set it in r1 again... It is just for info |
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| 218 | * so that It can be printed without accessing R1. |
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| 219 | */ |
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[64f8ae4] | 220 | stack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE; |
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[69ed59f] | 221 | |
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| 222 | /* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */ |
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[bde7f268] | 223 | *((uint32_t*)stack) = 0; |
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[69ed59f] | 224 | |
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[acc25ee] | 225 | /* |
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| 226 | * Initialize the interrupt related settings |
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| 227 | * SPRG1 = software managed IRQ stack |
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| 228 | * |
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| 229 | * This could be done latter (e.g in IRQ_INIT) but it helps to understand |
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| 230 | * some settings below... |
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| 231 | */ |
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[64f8ae4] | 232 | intrStack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE; |
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[69ed59f] | 233 | |
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[64f8ae4] | 234 | /* make sure it's properly aligned */ |
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[bde7f268] | 235 | (uint32_t)intrStack &= ~(CPU_STACK_ALIGNMENT-1); |
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[64f8ae4] | 236 | |
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| 237 | /* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */ |
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[bde7f268] | 238 | *((uint32_t*)intrStack) = 0; |
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[69ed59f] | 239 | |
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[ec821af] | 240 | _write_SPRG1((unsigned int)intrStack); |
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| 241 | |
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| 242 | /* signal them that we have fixed PR288 - eventually, this should go away */ |
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| 243 | _write_SPRG0(PPC_BSP_HAS_FIXED_PR288); |
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| 244 | |
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[acc25ee] | 245 | /* |
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| 246 | * Initialize default raw exception hanlders. See vectors/vectors_init.c |
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| 247 | */ |
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| 248 | initialize_exceptions(); |
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| 249 | /* |
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| 250 | * Init MMU block address translation to enable hardware |
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| 251 | * access |
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| 252 | */ |
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| 253 | /* |
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| 254 | * PC legacy IO space used for inb/outb and all PC |
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| 255 | * compatible hardware |
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| 256 | */ |
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[4f3e4f33] | 257 | setdbat(1, _IO_BASE, _IO_BASE, 0x10000000, IO_PAGE); |
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[acc25ee] | 258 | /* |
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| 259 | * PCI devices memory area. Needed to access OPENPIC features |
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| 260 | * provided by the RAVEN |
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| 261 | */ |
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[69ed59f] | 262 | /* T. Straumann: give more PCI address space */ |
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[35f93740] | 263 | setdbat(2, PCI_MEM_BASE, PCI_MEM_BASE, 0x10000000, IO_PAGE); |
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[acc25ee] | 264 | /* |
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| 265 | * Must have acces to open pic PCI ACK registers |
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| 266 | * provided by the RAVEN |
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[4f3e4f33] | 267 | * |
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[acc25ee] | 268 | */ |
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[95273a6] | 269 | setdbat(3, 0xf0000000, 0xf0000000, 0x10000000, IO_PAGE); |
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[4f3e4f33] | 270 | |
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[acc25ee] | 271 | select_console(CONSOLE_LOG); |
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| 272 | |
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| 273 | /* We check that the keyboard is present and immediately |
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| 274 | * select the serial console if not. |
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| 275 | */ |
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| 276 | err = kbdreset(); |
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| 277 | if (err) select_console(CONSOLE_SERIAL); |
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| 278 | |
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| 279 | boardManufacturer = checkPrepBoardType(&residualCopy); |
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| 280 | if (boardManufacturer != PREP_Motorola) { |
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| 281 | printk("Unsupported hardware vendor\n"); |
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| 282 | while (1); |
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| 283 | } |
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| 284 | myBoard = getMotorolaBoard(); |
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| 285 | |
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| 286 | printk("-----------------------------------------\n"); |
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| 287 | printk("Welcome to %s on %s\n", _RTEMS_version, motorolaBoardToString(myBoard)); |
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| 288 | printk("-----------------------------------------\n"); |
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| 289 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 290 | printk("Residuals are located at %x\n", (unsigned) &residualCopy); |
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| 291 | printk("Additionnal boot options are %s\n", loaderParam); |
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| 292 | printk("Initial system stack at %x\n",stack); |
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| 293 | printk("Software IRQ stack at %x\n",intrStack); |
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| 294 | printk("-----------------------------------------\n"); |
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| 295 | #endif |
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| 296 | |
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| 297 | #ifdef TEST_RETURN_TO_PPCBUG |
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| 298 | printk("Hit <Enter> to return to PPCBUG monitor\n"); |
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| 299 | printk("When Finished hit GO. It should print <Back from monitor>\n"); |
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| 300 | debug_getc(); |
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| 301 | _return_to_ppcbug(); |
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| 302 | printk("Back from monitor\n"); |
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| 303 | _return_to_ppcbug(); |
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| 304 | #endif /* TEST_RETURN_TO_PPCBUG */ |
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| 305 | |
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| 306 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 307 | printk("Going to start PCI buses scanning and initialization\n"); |
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| 308 | #endif |
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| 309 | InitializePCI(); |
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[3a3e0b0e] | 310 | |
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| 311 | { |
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[da3b8d3] | 312 | const struct _int_map *bspmap = motorolaIntMap(currentBoard); |
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[3a3e0b0e] | 313 | if( bspmap ) |
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| 314 | { |
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| 315 | printk("pci : Configuring interrupt routing for '%s'\n", motorolaBoardToString(currentBoard)); |
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| 316 | FixupPCI(bspmap, motorolaIntSwizzle(currentBoard) ); |
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| 317 | } |
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| 318 | else |
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| 319 | printk("pci : Interrupt routing not available for this bsp\n"); |
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| 320 | } |
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| 321 | |
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| 322 | |
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[acc25ee] | 323 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 324 | printk("Number of PCI buses found is : %d\n", BusCountPCI()); |
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| 325 | #endif |
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| 326 | #ifdef TEST_RAW_EXCEPTION_CODE |
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| 327 | printk("Testing exception handling Part 1\n"); |
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| 328 | /* |
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| 329 | * Cause a software exception |
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| 330 | */ |
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| 331 | __asm__ __volatile ("sc"); |
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| 332 | /* |
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| 333 | * Check we can still catch exceptions and returned coorectly. |
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| 334 | */ |
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| 335 | printk("Testing exception handling Part 2\n"); |
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| 336 | __asm__ __volatile ("sc"); |
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| 337 | #endif |
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| 338 | |
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| 339 | |
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| 340 | BSP_mem_size = residualCopy.TotalMemory; |
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| 341 | BSP_bus_frequency = residualCopy.VitalProductData.ProcessorBusHz; |
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| 342 | BSP_processor_frequency = residualCopy.VitalProductData.ProcessorHz; |
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| 343 | BSP_time_base_divisor = (residualCopy.VitalProductData.TimeBaseDivisor? |
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| 344 | residualCopy.VitalProductData.TimeBaseDivisor : 4000); |
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[4f3e4f33] | 345 | |
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[674b9497] | 346 | /* clear hostbridge errors but leave MCP disabled - |
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| 347 | * PCI config space scanning code will trip otherwise :-( |
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| 348 | */ |
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| 349 | _BSP_clear_hostbridge_errors(0 /* enableMCP */, 0/*quiet*/); |
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[14ec2d4] | 350 | |
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[35f93740] | 351 | |
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[4f3e4f33] | 352 | /* Allocate and set up the page table mappings |
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| 353 | * This is only available on >604 CPUs. |
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| 354 | * |
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| 355 | * NOTE: This setup routine may modify the available memory |
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| 356 | * size. It is essential to call it before |
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| 357 | * calculating the workspace etc. |
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| 358 | */ |
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| 359 | pt = BSP_pgtbl_setup(&BSP_mem_size); |
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| 360 | |
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| 361 | if (!pt || |
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| 362 | TRIV121_MAP_SUCCESS != triv121PgTblMap( |
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| 363 | pt, |
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| 364 | TRIV121_121_VSID, |
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| 365 | 0xfeff0000, |
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| 366 | 1, |
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| 367 | TRIV121_ATTR_IO_PAGE, |
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| 368 | TRIV121_PP_RW_PAGE |
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| 369 | )) { |
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| 370 | printk("WARNING: unable to setup page tables VME bridge must share PCI space\n"); |
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| 371 | } |
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[acc25ee] | 372 | |
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| 373 | /* |
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| 374 | * Set up our hooks |
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| 375 | * Make sure libc_init is done before drivers initialized so that |
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| 376 | * they can use atexit() |
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| 377 | */ |
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| 378 | |
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[df49c60] | 379 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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| 380 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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| 381 | Cpu_table.do_zero_of_workspace = TRUE; |
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| 382 | Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; |
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| 383 | Cpu_table.clicks_per_usec = BSP_processor_frequency/(BSP_time_base_divisor * 1000); |
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| 384 | Cpu_table.exceptions_in_RAM = TRUE; |
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[acc25ee] | 385 | |
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| 386 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 387 | printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size); |
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| 388 | #endif |
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| 389 | work_space_start = |
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| 390 | (unsigned char *)BSP_mem_size - BSP_Configuration.work_space_size; |
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| 391 | |
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[64f8ae4] | 392 | if ( work_space_start <= ((unsigned char *)__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) { |
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[acc25ee] | 393 | printk( "bspstart: Not enough RAM!!!\n" ); |
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| 394 | bsp_cleanup(); |
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| 395 | } |
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| 396 | |
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| 397 | BSP_Configuration.work_space_start = work_space_start; |
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| 398 | |
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| 399 | /* |
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| 400 | * Initalize RTEMS IRQ system |
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| 401 | */ |
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| 402 | BSP_rtems_irq_mng_init(0); |
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[4f3e4f33] | 403 | |
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| 404 | |
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| 405 | /* Activate the page table mappings only after |
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| 406 | * initializing interrupts because the irq_mng_init() |
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| 407 | * routine needs to modify the text |
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| 408 | */ |
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| 409 | if (pt) { |
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| 410 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 411 | printk("Page table setup finished; will activate it NOW...\n"); |
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| 412 | #endif |
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| 413 | BSP_pgtbl_activate(pt); |
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| 414 | /* finally, switch off DBAT3 */ |
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| 415 | setdbat(3, 0, 0, 0, 0); |
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| 416 | } |
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| 417 | |
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| 418 | /* |
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| 419 | * Initialize VME bridge - needs working PCI |
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| 420 | * and IRQ subsystems... |
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| 421 | */ |
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| 422 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 423 | printk("Going to initialize VME bridge\n"); |
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| 424 | #endif |
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| 425 | /* VME initialization is in a separate file so apps which don't use |
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| 426 | * VME or want a different configuration may link against a customized |
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| 427 | * routine. |
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| 428 | */ |
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| 429 | BSP_vme_config(); |
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| 430 | |
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[acc25ee] | 431 | #ifdef SHOW_MORE_INIT_SETTINGS |
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| 432 | printk("Exit from bspstart\n"); |
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| 433 | #endif |
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| 434 | } |
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