diff options
Diffstat (limited to 'arch/blackfin/cpu/interrupt.S')
-rw-r--r-- | arch/blackfin/cpu/interrupt.S | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/arch/blackfin/cpu/interrupt.S b/arch/blackfin/cpu/interrupt.S deleted file mode 100644 index 0e5e59e15d..0000000000 --- a/arch/blackfin/cpu/interrupt.S +++ /dev/null @@ -1,157 +0,0 @@ -/* - * interrupt.S - trampoline default exceptions/interrupts to C handlers - * - * Copyright (c) 2005-2009 Analog Devices Inc. - * Licensed under the GPL-2 or later. - */ - -#include <config.h> -#include <asm/blackfin.h> -#include <asm/entry.h> -#include <asm/ptrace.h> -#include <asm/deferred.h> -#include <asm/mach-common/bits/core.h> - -.text - -/* default entry point for exceptions */ -ENTRY(_trap) - CONFIG_BFIN_SCRATCH_REG = sp; - sp.l = LO(L1_SRAM_SCRATCH_END - 20); - sp.h = HI(L1_SRAM_SCRATCH_END - 20); - SAVE_ALL_SYS - - r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ - r1 = 3; /* EVT3 space */ - sp += -12; - call _trap_c; - sp += 12; - -#ifdef CONFIG_EXCEPTION_DEFER - CC = R0 == 0; - IF CC JUMP .Lexit_trap; - - /* To avoid double faults, lower our priority to IRQ5 */ - p4.l = lo(COREMMR_BASE); - p4.h = hi(COREMMR_BASE); - - r7.h = _exception_to_level5; - r7.l = _exception_to_level5; - [p4 + (EVT5 - COREMMR_BASE)] = r7; - - /* - * Save these registers, as they are only valid in exception context - * (where we are now - as soon as we defer to IRQ5, they can change) - */ - p5.l = _deferred_regs; - p5.h = _deferred_regs; - r6 = [p4 + (DCPLB_FAULT_ADDR - COREMMR_BASE)]; - [p5 + (deferred_regs_DCPLB_FAULT_ADDR * 4)] = r6; - - r6 = [p4 + (ICPLB_FAULT_ADDR - COREMMR_BASE)]; - [p5 + (deferred_regs_ICPLB_FAULT_ADDR * 4)] = r6; - - /* Save the state of single stepping */ - r6 = SYSCFG; - [p5 + (deferred_regs_SYSCFG * 4)] = r6; - /* Clear it while we handle the exception in IRQ5 mode - * RESTORE_ALL_SYS will load it, so all we need to do is store it - * in the right place - */ - BITCLR(r6, SYSCFG_SSSTEP_P); - [SP + PT_SYSCFG] = r6; - - /* Since we are going to clobber RETX, we need to save it */ - r6 = retx; - [p5 + (deferred_regs_retx * 4)] = r6; - - /* Save the current IMASK, since we change in order to jump to level 5 */ - cli r6; - [p5 + (deferred_regs_IMASK * 4)] = r6; - - /* Disable all interrupts, but make sure level 5 is enabled so - * we can switch to that level. - */ - r6 = 0x3f; - sti r6; - - /* Clobber RETX so we don't end up back at a faulting instruction */ - [sp + PT_RETX] = r7; - - /* In case interrupts are disabled IPEND[4] (global interrupt disable bit) - * clear it (re-enabling interrupts again) by the special sequence of pushing - * RETI onto the stack. This way we can lower ourselves to IVG5 even if the - * exception was taken after the interrupt handler was called but before it - * got a chance to enable global interrupts itself. - */ - [--sp] = reti; - sp += 4; - - RAISE 5; -.Lexit_trap: -#endif - -#if ANOMALY_05000257 - R7 = LC0; - LC0 = R7; - R7 = LC1; - LC1 = R7; -#endif - - RESTORE_ALL_SYS - sp = CONFIG_BFIN_SCRATCH_REG; - rtx; -ENDPROC(_trap) - -#ifdef CONFIG_EXCEPTION_DEFER -/* Deferred (IRQ5) exceptions */ -ENTRY(_exception_to_level5) - SAVE_ALL_SYS - - /* Now we have to fix things up */ - p4.l = lo(EVT5); - p4.h = hi(EVT5); - r0.l = _evt_default; - r0.h = _evt_default; - [p4] = r0; - csync; - - p4.l = _deferred_regs; - p4.h = _deferred_regs; - r0 = [p4 + (deferred_regs_retx * 4)]; - [sp + PT_PC] = r0; - - r0 = [p4 + (deferred_regs_SYSCFG * 4)]; - [sp + PT_SYSCFG] = r0; - - r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ - r1 = 5; /* EVT5 space */ - sp += -12; - call _trap_c; - sp += 12; - - /* Restore IMASK */ - r0 = [p4 + (deferred_regs_IMASK * 4)]; - sti r0; - - RESTORE_ALL_SYS - - rti; -ENDPROC(_exception_to_level5) -#endif - -/* default entry point for interrupts */ -ENTRY(_evt_default) - SAVE_ALL_SYS - r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ - sp += -12; - call _bfin_panic; - sp += 12; - RESTORE_ALL_SYS - rti; -ENDPROC(_evt_default) - -/* NMI handler */ -ENTRY(_evt_nmi) - rtn; -ENDPROC(_evt_nmi) |