diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mbx8xx/irq/irq_asm.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mbx8xx/irq/irq_asm.S | 84 |
1 files changed, 42 insertions, 42 deletions
diff --git a/c/src/lib/libbsp/powerpc/mbx8xx/irq/irq_asm.S b/c/src/lib/libbsp/powerpc/mbx8xx/irq/irq_asm.S index 1d3e1d2fcf..fa877aafaf 100644 --- a/c/src/lib/libbsp/powerpc/mbx8xx/irq/irq_asm.S +++ b/c/src/lib/libbsp/powerpc/mbx8xx/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 @@ -15,22 +15,22 @@ * * $Id$ */ - + #include <rtems/asm.h> #include <rtems/score/cpu.h> #include <bsp/vectors.h> #include <libcpu/raw_exception.h> - + #define SYNC \ sync; \ isync - + .text - .p2align 5 - + .p2align 5 + PUBLIC_VAR(decrementer_exception_vector_prolog_code) - + SYM (decrementer_exception_vector_prolog_code): /* * let room for exception frame @@ -38,32 +38,32 @@ SYM (decrementer_exception_vector_prolog_code): stwu r1, - (EXCEPTION_FRAME_END)(r1) stw r4, GPR4_OFFSET(r1) #ifdef THIS_CODE_LINKED_USING_FLASH_ADDR_RANGE - /* + /* * save link register */ mflr r4 stw r4, EXC_LR_OFFSET(r1) - /* + /* * make link register contain shared_raw_irq_code_entry * address */ lis r4,shared_raw_irq_code_entry@h ori r4,r4,shared_raw_irq_code_entry@l mtlr r4 - + li r4, ASM_DEC_VECTOR blr #else li r4, ASM_DEC_VECTOR ba shared_raw_irq_code_entry -#endif +#endif 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 @@ -71,12 +71,12 @@ SYM (external_exception_vector_prolog_code): stwu r1, - (EXCEPTION_FRAME_END)(r1) stw r4, GPR4_OFFSET(r1) #ifdef THIS_CODE_LINKED_USING_FLASH_ADDR_RANGE - /* + /* * save link register */ mflr r4 stw r4, EXC_LR_OFFSET(r1) - /* + /* * make link register contain shared_raw_irq_code_entry * address */ @@ -90,14 +90,14 @@ SYM (external_exception_vector_prolog_code): li r4, ASM_EXT_VECTOR ba shared_raw_irq_code_entry #endif - + 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): /* @@ -108,17 +108,17 @@ 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) stw r2, GPR2_OFFSET(r1) stw r3, GPR3_OFFSET(r1) - + mfsrr0 r0 mfsrr1 r2 mfmsr r3 - + stw r0, SRR0_FRAME_OFFSET(r1) stw r2, SRR1_FRAME_OFFSET(r1) /* @@ -157,14 +157,14 @@ SYM (shared_raw_irq_code_entry): #ifndef THIS_CODE_LINKED_USING_FLASH_ADDR_RANGE mflr r8 #endif - + stw r5, EXC_CR_OFFSET(r1) stw r6, EXC_CTR_OFFSET(r1) stw r7, EXC_XER_OFFSET(r1) -#ifndef THIS_CODE_LINKED_USING_FLASH_ADDR_RANGE +#ifndef THIS_CODE_LINKED_USING_FLASH_ADDR_RANGE stw r8, EXC_LR_OFFSET(r1) #endif - + /* * Add some non volatile registers to store information * that will be used when returning from C handler @@ -197,9 +197,9 @@ SYM (shared_raw_irq_code_entry): cmpwi r2,0 bne nested mfspr r1, SPRG1 - -nested: - /* + +nested: + /* * Start Incrementing nesting level in R2 */ addi r2,r2,1 @@ -216,7 +216,7 @@ nested: /* store new nesting level in _ISR_Nest_level */ stw r2, _ISR_Nest_level@l(r7) #endif - + addi r6, r6, 1 mfmsr r5 /* @@ -226,7 +226,7 @@ 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 @@ -235,7 +235,7 @@ nested: 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 */ @@ -259,7 +259,7 @@ nested: 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 @@ -267,14 +267,14 @@ 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 @@ -306,12 +306,12 @@ 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) @@ -326,21 +326,21 @@ 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 */ @@ -348,7 +348,7 @@ 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 @@ -377,7 +377,7 @@ easy_exit: /* * Restore rfi related settings */ - + lwz r4, SRR1_FRAME_OFFSET(r1) lwz r2, SRR0_FRAME_OFFSET(r1) lwz r3, GPR3_OFFSET(r1) |