1 /*==========================================================================
5 // HAL miscellaneous functions
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
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27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
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30 // License. However the source code for this file must still be made available
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38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
44 // Contributors: nickg, jlarmour, dmoseley
46 // Purpose: HAL miscellaneous functions
47 // Description: This file contains miscellaneous functions provided by the
50 //####DESCRIPTIONEND####
52 //========================================================================*/
54 #include <pkgconf/hal.h>
56 #include <cyg/infra/cyg_type.h>
57 #include <cyg/infra/cyg_trac.h>
59 #include <cyg/hal/hal_arch.h>
61 #include <cyg/hal/hal_intr.h>
63 #include <cyg/hal/hal_cache.h>
66 void trace( CYG_ADDRWORD tag, CYG_ADDRWORD a1, CYG_ADDRWORD a2)
68 CYG_ADDRWORD **pp = (CYG_ADDRWORD **)0x48100000;
69 CYG_ADDRWORD *ix = (CYG_ADDRWORD *)0x4810000C;
70 CYG_ADDRWORD *p = *pp;
80 /*------------------------------------------------------------------------*/
82 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
83 cyg_bool cyg_hal_stop_constructors;
87 cyg_hal_invoke_constructors(void)
89 typedef void (*pfunc) (void);
90 extern pfunc _CTOR_LIST__[];
91 extern pfunc _CTOR_END__[];
93 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
94 static pfunc *p = &_CTOR_END__[-1];
96 cyg_hal_stop_constructors = 0;
97 for (; p >= _CTOR_LIST__; p--) {
99 if (cyg_hal_stop_constructors) {
107 for (p = &_CTOR_END__[-1]; p >= _CTOR_LIST__; p--)
111 } // cyg_hal_invoke_constructors()
113 /*------------------------------------------------------------------------*/
114 /* Determine the index of the ls bit of the supplied mask. */
117 hal_lsbit_index(cyg_uint32 mask)
121 static const signed char tab[64] =
122 { -1, 0, 1, 12, 2, 6, 0, 13, 3, 0, 7, 0, 0, 0, 0, 14, 10,
123 4, 0, 0, 8, 0, 0, 25, 0, 0, 0, 0, 0, 21, 27 , 15, 31, 11,
124 5, 0, 0, 0, 0, 0, 9, 0, 0, 24, 0, 0 , 20, 26, 30, 0, 0, 0,
125 0, 23, 0, 19, 29, 0, 22, 18, 28, 17, 16, 0
136 /*------------------------------------------------------------------------*/
137 /* Determine the index of the ms bit of the supplied mask. */
140 hal_msbit_index(cyg_uint32 mask)
145 /* Phase 1: make word with all ones from that one to the right */
152 /* Phase 2: calculate number of "1" bits in the word */
153 w = (x & 0x55555555) + ((x >> 1) & 0x55555555);
154 w = (w & 0x33333333) + ((w >> 2) & 0x33333333);
156 w = (w & 0x000F000F) + ((w >> 8) & 0x000F000F);
157 return (cyg_uint32)((w + (w >> 16)) & 0xFF) - 1;
160 /*------------------------------------------------------------------------*/
161 /* First level C exception handler. */
163 externC void __handle_exception (void);
165 externC HAL_SavedRegisters *_hal_registers;
167 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
168 externC void* volatile __mem_fault_handler;
172 cyg_hal_exception_handler(HAL_SavedRegisters *regs, CYG_WORD32 isr)
174 CYG_WORD vector = regs->vector;
176 #if defined(CYGNUM_HAL_EXCEPTION_SYSTEM_ERROR) && defined(CYGNUM_HAL_EXCEPTION_JTAG)
177 if( vector == CYGNUM_HAL_EXCEPTION_SYSTEM_ERROR )
179 // Translate vector number via ISR bits into the full
181 vector = CYGNUM_HAL_EXCEPTION_JTAG+hal_lsbit_index( isr );
183 regs->vector = vector;
187 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
189 // If we caught an exception inside the stubs, see if we were expecting it
190 // and if so jump to the saved address
191 if (__mem_fault_handler) {
192 regs->pc = (CYG_ADDRWORD)__mem_fault_handler;
193 return 0; // Caught an exception inside stubs
196 // Set the pointer to the registers of the current exception
197 // context. At entry the GDB stub will expand the
198 // HAL_SavedRegisters structure into a (bigger) register array.
199 _hal_registers = regs;
201 __handle_exception();
203 #elif defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT)
205 if( vector == CYGNUM_HAL_EXCEPTION_WATCHDOG )
207 // Special case the watchdog timer exception, look for an
208 // ISR for it and call it if present. Otherwise pass on to
209 // the exception system.
211 cyg_uint32 (*isr)(CYG_ADDRWORD,CYG_ADDRWORD);
214 HAL_TRANSLATE_VECTOR( CYGNUM_HAL_INTERRUPT_WATCHDOG, index );
216 isr = (cyg_uint32 (*)(CYG_ADDRWORD,CYG_ADDRWORD))
217 (hal_interrupt_handlers[index]);
221 isr(CYGNUM_HAL_INTERRUPT_WATCHDOG,
222 hal_interrupt_data[CYGNUM_HAL_INTERRUPT_WATCHDOG]
228 #if defined(CYGPKG_HAL_EXCEPTIONS)
230 // We should decode the vector and pass a more appropriate
231 // value as the second argument. For now we simply pass a
232 // pointer to the saved registers. We should also divert
233 // breakpoint and other debug vectors into the debug stubs.
235 cyg_hal_deliver_exception( vector, (CYG_ADDRWORD)regs );
244 /*------------------------------------------------------------------------*/
247 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
248 externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
250 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) && \
251 defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
252 defined(HAL_CTRLC_ISR)
254 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
255 if( vector == CYGHWR_HAL_GDB_PORT_VECTOR )
258 cyg_uint32 result = HAL_CTRLC_ISR( vector, data );
259 if( result != 0 ) return result;
264 CYG_TRACE1(true, "Interrupt: %d", vector);
265 CYG_FAIL("Spurious Interrupt!!!");
269 #else // CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
271 #include <cyg/hal/plf_io.h>
272 externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
274 #if defined(CYGDBG_HAL_MN10300_DEBUG_GDB_CTRLC_SUPPORT) && \
275 defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
276 defined(HAL_CTRLC_ISR)
278 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)
279 #if defined(HAL_DIAG_IRQ_CHECK)
282 /* let ROM monitor handle unexpected interrupts */
283 HAL_DIAG_IRQ_CHECK(vector, ret);
287 #endif // def HAL_DIAG_IRQ_CHECK
288 #endif // def CYGSEM_HAL_USE_ROM_MONITOR_CygMon
295 /*------------------------------------------------------------------------*/
296 /* Idle thread activity. */
298 externC void hal_idle_thread_action(cyg_uint32 loop_count)
302 /*------------------------------------------------------------------------*/
303 /* End of hal_misc.c */