diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_asm.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_asm.S | 92 |
1 files changed, 46 insertions, 46 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_asm.S b/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_asm.S index a0d7d02510..64f0176109 100644 --- a/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_asm.S +++ b/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_asm.S @@ -1,5 +1,5 @@ /* - * This file contains the assembly code for the PowerPC + * This file contains the assembly code for the PowerPC * IRQ veneers for RTEMS. * * The license and distribution terms for this file may be @@ -14,7 +14,7 @@ * * $Id$ */ - + #include <bsp/vectors.h> #include <rtems/score/cpuopts.h> /* for PPC_HAS_FPU */ #include <rtems/score/cpu.h> @@ -24,13 +24,13 @@ #define SYNC \ sync; \ isync - + .text - .p2align 5 - - + .p2align 5 + + PUBLIC_VAR(decrementer_exception_vector_prolog_code) - + SYM (decrementer_exception_vector_prolog_code): /* @@ -42,11 +42,11 @@ SYM (decrementer_exception_vector_prolog_code): ba shared_raw_irq_code_entry PUBLIC_VAR (decrementer_exception_vector_prolog_code_size) - + decrementer_exception_vector_prolog_code_size = . - decrementer_exception_vector_prolog_code PUBLIC_VAR(external_exception_vector_prolog_code) - + SYM (external_exception_vector_prolog_code): /* * let room for exception frame @@ -57,12 +57,12 @@ SYM (external_exception_vector_prolog_code): ba shared_raw_irq_code_entry PUBLIC_VAR (external_exception_vector_prolog_code_size) - + external_exception_vector_prolog_code_size = . - external_exception_vector_prolog_code PUBLIC_VAR(shared_raw_irq_code_entry) PUBLIC_VAR(C_dispatch_irq_handler) - + .p2align 5 SYM (shared_raw_irq_code_entry): /* @@ -73,7 +73,7 @@ SYM (shared_raw_irq_code_entry): * R4 : vector number */ /* - * Save SRR0/SRR1 As soon As possible as it is the minimal needed + * Save SRR0/SRR1 As soon As possible as it is the minimal needed * to reenable exception processing */ stw r0, GPR0_OFFSET(r1) @@ -100,7 +100,7 @@ SYM (shared_raw_irq_code_entry): #endif mtmsr r3 SYNC - + /* * Push C scratch registers on the current stack. It may * actually be the thread stack or the interrupt stack. @@ -122,7 +122,7 @@ SYM (shared_raw_irq_code_entry): mfctr r6 mfxer r7 mflr r8 - + stw r5, EXC_CR_OFFSET(r1) stw r6, EXC_CTR_OFFSET(r1) stw r7, EXC_XER_OFFSET(r1) @@ -148,23 +148,23 @@ SYM (shared_raw_irq_code_entry): /* mfspr r2, SPRG0 */ addis r6, 0, _ISR_Nest_level@ha lwz r2, _ISR_Nest_level@l( r6 ) - + /* * Check if stack switch is necessary */ cmpwi r2,0 bne nested mfspr r1, SPRG1 - -nested: - /* + +nested: + /* * Start Incrementing nesting level in R2 */ addi r2,r2,1 - + addis r6, 0, _ISR_Nest_level@ha stw r2, _ISR_Nest_level@l( r6 ) - + /* * Start Incrementing _Thread_Dispatch_disable_level R4 = _Thread_Dispatch_disable_level */ @@ -173,7 +173,7 @@ nested: * store new nesting level in SPRG0 */ /* mtspr SPRG0, r2 */ - + addi r6, r6, 1 mfmsr r5 /* @@ -183,40 +183,40 @@ nested: /* * We are now running on the interrupt stack. External and decrementer * exceptions are still disabled. I see no purpose trying to optimize - * further assembler code. + * further assembler code. */ /* * Call C exception handler for decrementer Interrupt frame is passed just * in case... */ - + addi r3, r14, 0x8 bl C_dispatch_irq_handler /* C_dispatch_irq_handler(cpu_interrupt_frame* r3, vector r4) */ /* - * start decrementing nesting level. Note : do not test result against 0 + * start decrementing nesting level. Note : do not test result against 0 * value as an easy exit condition because if interrupt nesting level > 1 * then _Thread_Dispatch_disable_level > 1 */ /* mfspr r2, SPRG0 */ - + addis r6, 0, _ISR_Nest_level@ha lwz r2, _ISR_Nest_level@l( r6 ) - + /* * start decrementing _Thread_Dispatch_disable_level */ lwz r3,_Thread_Dispatch_disable_level@l(r15) addi r2, r2, -1 /* Continue decrementing nesting level */ addi r3, r3, -1 /* Continue decrementing _Thread_Dispatch_disable_level */ - - stw r2, _ISR_Nest_level@l( r6 ) + + stw r2, _ISR_Nest_level@l( r6 ) /* mtspr SPRG0, r2 */ /* End decrementing nesting level */ - + stw r3,_Thread_Dispatch_disable_level@l(r15) /* End decrementing _Thread_Dispatch_disable_level */ cmpwi r3, 0 /* - * switch back to original stack (done here just optimize registers + * switch back to original stack (done here just optimize registers * contention. Could have been done before...) */ addi r1, r14, 0 @@ -224,14 +224,14 @@ nested: /* * Here we are running again on the thread system stack. * We have interrupt nesting level = _Thread_Dispatch_disable_level = 0. - * Interrupt are still disabled. Time to check if scheduler request to + * Interrupt are still disabled. Time to check if scheduler request to * do something with the current thread... */ addis r4, 0, _Context_Switch_necessary@ha lwz r5, _Context_Switch_necessary@l(r4) cmpwi r5, 0 bne switch - + addis r6, 0, _ISR_Signals_to_thread_executing@ha lwz r7, _ISR_Signals_to_thread_executing@l(r6) cmpwi r7, 0 @@ -244,7 +244,7 @@ nested: */ stmw r16, GPR16_OFFSET(r1) addi r3, r1, 0x8 - + /* * compute SP at exception entry */ @@ -257,7 +257,7 @@ nested: * Call High Level signal handling code */ bl _ThreadProcessSignalsFromIrq - + /* * start restoring exception like frame @@ -266,16 +266,16 @@ nested: lwz r30, EXC_XER_OFFSET(r1) lwz r29, EXC_CR_OFFSET(r1) lwz r28, EXC_LR_OFFSET(r1) - + mtctr r31 mtxer r30 mtcr r29 mtlr r28 - - + + lmw r4, GPR4_OFFSET(r1) - + lwz r2, GPR2_OFFSET(r1) lwz r0, GPR0_OFFSET(r1) @@ -289,21 +289,21 @@ nested: /* * Restore rfi related settings */ - + lwz r3, SRR1_FRAME_OFFSET(r1) mtsrr1 r3 lwz r3, SRR0_FRAME_OFFSET(r1) mtsrr0 r3 - + lwz r3, GPR3_OFFSET(r1) addi r1,r1, EXCEPTION_FRAME_END SYNC rfi - + switch: bl SYM (_Thread_Dispatch) - -easy_exit: + +easy_exit: /* * start restoring interrupt frame */ @@ -311,7 +311,7 @@ easy_exit: lwz r4, EXC_XER_OFFSET(r1) lwz r5, EXC_CR_OFFSET(r1) lwz r6, EXC_LR_OFFSET(r1) - + mtctr r3 mtxer r4 mtcr r5 @@ -337,11 +337,11 @@ easy_exit: xori r3, r3, MSR_RI /*| MSR_IR | MSR_DR*/ mtmsr r3 SYNC - + /* * Restore rfi related settings */ - + lwz r4, SRR1_FRAME_OFFSET(r1) lwz r2, SRR0_FRAME_OFFSET(r1) lwz r3, GPR3_OFFSET(r1) |