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comparison packages/hal/mips/arch/current/src/vectors.S @ 10:d3fbcdfa1b2f ecos-sw-1999-05-29

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Merge from eCos master repository on 1999-05-29-00:13:11-BST
author jlarmour
date Fri, 28 May 1999 16:43:09 +0000
parents ece80412419a
children 01ce82f3e11a
comparison
equal deleted inserted replaced
9:95cc44ea0068 10:d3fbcdfa1b2f
162 # Call constructors 162 # Call constructors
163 .extern cyg_hal_invoke_constructors 163 .extern cyg_hal_invoke_constructors
164 jal cyg_hal_invoke_constructors 164 jal cyg_hal_invoke_constructors
165 nop 165 nop
166 166
167 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) && !defined(CYG_HAL_STARTUP_STUBS) 167 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
168 .extern initialize_stub 168 .extern initialize_stub
169 jal initialize_stub 169 jal initialize_stub
170 nop 170 nop
171 #endif 171 #endif
172 172
190 # We enter here with all of the CPU state still 190 # We enter here with all of the CPU state still
191 # in its registers except: 191 # in its registers except:
192 # K0 = vector index 192 # K0 = vector index
193 # K1 = address of this function 193 # K1 = address of this function
194 194
195
196 move k1,sp # K1 = original SP 195 move k1,sp # K1 = original SP
197 196
198 #ifdef CYG_HAL_ROM_MONITOR 197 #ifdef CYG_HAL_ROM_MONITOR
199 # Switch to interrupt stack to handle exception 198 # Switch to interrupt stack to handle exception
200 la sp,__interrupt_stack 199 la sp,__interrupt_stack
370 369
371 hal_fpu_save sp 370 hal_fpu_save sp
372 371
373 # The machine state is now all saved on the stack. 372 # The machine state is now all saved on the stack.
374 373
375 hal_diag_intr_start
376
377 # Load Global Pointer register. 374 # Load Global Pointer register.
378 la gp,_gp 375 la gp,_gp
379 376
380 #ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT 377 #ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT
381 .extern cyg_scheduler_sched_lock 378 .extern cyg_scheduler_sched_lock
419 move s1,s2 # Vector == interrupt number 416 move s1,s2 # Vector == interrupt number
420 #endif 417 #endif
421 418
422 # Here s1 is the number of the vector to be called and s2 is 419 # Here s1 is the number of the vector to be called and s2 is
423 # the number of the interrupt being serviced. 420 # the number of the interrupt being serviced.
424 421
422 hal_diag_intr_start
423
425 #if defined(CYGPKG_KERNEL_INSTRUMENT) && defined(CYGDBG_KERNEL_INSTRUMENT_INTR) 424 #if defined(CYGPKG_KERNEL_INSTRUMENT) && defined(CYGDBG_KERNEL_INSTRUMENT_INTR)
426 425
427 # Call cyg_instrument to record that this interrupt is being raised. 426 # Call cyg_instrument to record that this interrupt is being raised.
428 427
429 li a0,0x0301 # a0 = type = INTR,RAISE 428 li a0,0x0301 # a0 = type = INTR,RAISE
430 move a1,s1 # a1 = vector number 429 move a1,s1 # a1 = vector number
431 jal cyg_instrument # call instrument function 430 jal cyg_instrument # call instrument function
432 xor a2,a2,a2 # arg2 = 0 (delay slot) 431 xor a2,a2,a2 # arg2 = 0 (delay slot)
433 #endif 432 #endif
434 433
434 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
435 # If we are supporting Ctrl-C interrupts from GDB, we must squirrel
436 # away a pointer to the save interrupt state here so that we can
437 # plant a breakpoint at some later time.
438
439 .extern hal_saved_interrupt_state
440 la v0,hal_saved_interrupt_state
441 sw s0,0(v0)
442
443 #endif
444
435 sll s1,s1,2 # s1 = byte offset of vector 445 sll s1,s1,2 # s1 = byte offset of vector
436 446
447 hal_cpu_except_enable # reenable exceptions
448
437 la t2,hal_interrupt_handlers # handler table 449 la t2,hal_interrupt_handlers # handler table
438 add t2,t2,s1 # address of ISR ptr 450 add t2,t2,s1 # address of ISR ptr
439 lw t2,0(t2) # ISR pointer 451 lw t2,0(t2) # ISR pointer
440 452
441 la a1,hal_interrupt_data # data table 453 la a1,hal_interrupt_data # data table
442 add a1,a1,s1 # address of data ptr 454 add a1,a1,s1 # address of data ptr
443 lw a1,0(a1) # Data pointer 455 lw a1,0(a1) # Data pointer
444 456
445 move a0,s2 # pass interrupt number 457 move a0,s2 # pass interrupt number
446 458
447 move a2,s0 # arg3 = saved register dump
448
449 jalr t2 # call ISR via t2 459 jalr t2 # call ISR via t2
450 nop # (delay slot) 460 nop # (delay slot)
451 461
452 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK 462 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK
453 463