diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S index 9271a83f1d..cf79c13ed9 100644 --- a/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S +++ b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S @@ -1,7 +1,7 @@ /* * irq_asm.S * - * 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 @@ -23,7 +23,7 @@ * * $Id$ */ - + #include <rtems/asm.h> #include <rtems/score/cpu.h> #include <libcpu/vectors.h> @@ -33,7 +33,7 @@ #define SYNC \ sync; \ isync - + /* * Common handler for interrupt exceptions. * @@ -46,22 +46,22 @@ * LR have been saved. R4 holds the exception number. */ PUBLIC_VAR(C_dispatch_irq_handler) - + PUBLIC_VAR(dispatch_irq_handler) SYM (dispatch_irq_handler): /* - * 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 re-enable exception processing. - * + * * Note that R2 should never change (it's the EABI pointer to - * .sdata2), but we save it just in case. + * .sdata2), but we save it just in case. */ stw r0, GPR0_OFFSET(r1) stw r2, GPR2_OFFSET(r1) - + mfsrr0 r0 mfsrr1 r3 - + stw r0, SRR0_FRAME_OFFSET(r1) stw r3, SRR1_FRAME_OFFSET(r1) @@ -93,11 +93,11 @@ SYM (dispatch_irq_handler): mfcr r5 mfctr r6 mfxer r7 - + stw r5, EXC_CR_OFFSET(r1) stw r6, EXC_CTR_OFFSET(r1) stw r7, EXC_XER_OFFSET(r1) - + /* * Add some non volatile registers to store information that will be * used when returning from C handler. @@ -128,9 +128,9 @@ SYM (dispatch_irq_handler): bne nested mfspr r1, SPRG1 /* switch to interrupt stack */ -nested: +nested: - /* + /* * Start Incrementing nesting level in R3 */ addi r3, r3, 1 @@ -153,11 +153,11 @@ 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 or external interrupt. + * Call C exception handler for decrementer or external interrupt. * Pass frame along just in case.. * * C_dispatch_irq_handler(cpu_interrupt_frame* r3, vector r4) @@ -166,7 +166,7 @@ nested: bl C_dispatch_irq_handler /* - * 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 */ @@ -187,7 +187,7 @@ nested: 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 @@ -196,14 +196,14 @@ 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 lbz r5, _Context_Switch_necessary@l(r4) cmpwi r5, 0 bne switch - + addis r6, 0, _ISR_Signals_to_thread_executing@ha lbz r7, _ISR_Signals_to_thread_executing@l(r6) cmpwi r7, 0 @@ -241,12 +241,12 @@ 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) @@ -260,22 +260,22 @@ 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 */ @@ -283,7 +283,7 @@ 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 |