From 4ba66a9760722ccbb691b8f7116cad2f791cca7b Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 7 Mar 2018 22:23:24 +0100 Subject: arch: remove blackfin port The Analog Devices Blackfin port was added in 2007 and was rather active for a while, but all work on it has come to a standstill over time, as Analog have changed their product line-up. Aaron Wu confirmed that the architecture port is no longer relevant, and multiple people suggested removing blackfin independently because of some of its oddities like a non-working SMP port, and the amount of duplication between the chip variants, which cause extra work when doing cross-architecture changes. Link: https://docs.blackfin.uclinux.org/ Acked-by: Aaron Wu Acked-by: Bryan Wu Cc: Steven Miao Cc: Mike Frysinger Signed-off-by: Arnd Bergmann --- arch/blackfin/mach-common/interrupt.S | 326 ---------------------------------- 1 file changed, 326 deletions(-) delete mode 100644 arch/blackfin/mach-common/interrupt.S (limited to 'arch/blackfin/mach-common/interrupt.S') diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S deleted file mode 100644 index 469ce7282dc8..000000000000 --- a/arch/blackfin/mach-common/interrupt.S +++ /dev/null @@ -1,326 +0,0 @@ -/* - * Interrupt Entries - * - * Copyright 2005-2009 Analog Devices Inc. - * D. Jeff Dionne - * Kenneth Albanowski - * - * Licensed under the GPL-2 or later. - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -.extern _ret_from_exception - -#ifdef CONFIG_I_ENTRY_L1 -.section .l1.text -#else -.text -#endif - -.align 4 /* just in case */ - -/* Common interrupt entry code. First we do CLI, then push - * RETI, to keep interrupts disabled, but to allow this state to be changed - * by local_bh_enable. - * R0 contains the interrupt number, while R1 may contain the value of IPEND, - * or garbage if IPEND won't be needed by the ISR. */ -__common_int_entry: - [--sp] = fp; - [--sp] = usp; - - [--sp] = i0; - [--sp] = i1; - [--sp] = i2; - [--sp] = i3; - - [--sp] = m0; - [--sp] = m1; - [--sp] = m2; - [--sp] = m3; - - [--sp] = l0; - [--sp] = l1; - [--sp] = l2; - [--sp] = l3; - - [--sp] = b0; - [--sp] = b1; - [--sp] = b2; - [--sp] = b3; - [--sp] = a0.x; - [--sp] = a0.w; - [--sp] = a1.x; - [--sp] = a1.w; - - [--sp] = LC0; - [--sp] = LC1; - [--sp] = LT0; - [--sp] = LT1; - [--sp] = LB0; - [--sp] = LB1; - - [--sp] = ASTAT; - - [--sp] = r0; /* Skip reserved */ - [--sp] = RETS; - r2 = RETI; - [--sp] = r2; - [--sp] = RETX; - [--sp] = RETN; - [--sp] = RETE; - [--sp] = SEQSTAT; - [--sp] = r1; /* IPEND - R1 may or may not be set up before jumping here. */ - - /* Switch to other method of keeping interrupts disabled. */ -#ifdef CONFIG_DEBUG_HWERR - r1 = 0x3f; - sti r1; -#else - cli r1; -#endif -#ifdef CONFIG_TRACE_IRQFLAGS - [--sp] = r0; - sp += -12; - call _trace_hardirqs_off; - sp += 12; - r0 = [sp++]; -#endif - [--sp] = RETI; /* orig_pc */ - /* Clear all L registers. */ - r1 = 0 (x); - l0 = r1; - l1 = r1; - l2 = r1; - l3 = r1; -#ifdef CONFIG_FRAME_POINTER - fp = 0; -#endif - - ANOMALY_283_315_WORKAROUND(p5, r7) - - r1 = sp; - SP += -12; -#ifdef CONFIG_IPIPE - call ___ipipe_grab_irq - SP += 12; - cc = r0 == 0; - if cc jump .Lcommon_restore_context; -#else /* CONFIG_IPIPE */ - -#ifdef CONFIG_PREEMPT - r7 = sp; - r4.l = lo(ALIGN_PAGE_MASK); - r4.h = hi(ALIGN_PAGE_MASK); - r7 = r7 & r4; - p5 = r7; - r7 = [p5 + TI_PREEMPT]; /* get preempt count */ - r7 += 1; /* increment it */ - [p5 + TI_PREEMPT] = r7; -#endif - pseudo_long_call _do_irq, p2; - -#ifdef CONFIG_PREEMPT - r7 += -1; - [p5 + TI_PREEMPT] = r7; /* restore preempt count */ -#endif - - SP += 12; -#endif /* CONFIG_IPIPE */ - pseudo_long_call _return_from_int, p2; -.Lcommon_restore_context: - RESTORE_CONTEXT - rti; - -/* interrupt routine for ivhw - 5 */ -ENTRY(_evt_ivhw) - /* In case a single action kicks off multiple memory transactions, (like - * a cache line fetch, - this can cause multiple hardware errors, let's - * catch them all. First - make sure all the actions are complete, and - * the core sees the hardware errors. - */ - SSYNC; - SSYNC; - - SAVE_ALL_SYS -#ifdef CONFIG_FRAME_POINTER - fp = 0; -#endif - - ANOMALY_283_315_WORKAROUND(p5, r7) - - /* Handle all stacked hardware errors - * To make sure we don't hang forever, only do it 10 times - */ - R0 = 0; - R2 = 10; -1: - P0.L = LO(ILAT); - P0.H = HI(ILAT); - R1 = [P0]; - CC = BITTST(R1, EVT_IVHW_P); - IF ! CC JUMP 2f; - /* OK a hardware error is pending - clear it */ - R1 = EVT_IVHW_P; - [P0] = R1; - R0 += 1; - CC = R1 == R2; - if CC JUMP 2f; - JUMP 1b; -2: - # We are going to dump something out, so make sure we print IPEND properly - p2.l = lo(IPEND); - p2.h = hi(IPEND); - r0 = [p2]; - [sp + PT_IPEND] = r0; - - /* set the EXCAUSE to HWERR for trap_c */ - r0 = [sp + PT_SEQSTAT]; - R1.L = LO(VEC_HWERR); - R1.H = HI(VEC_HWERR); - R0 = R0 | R1; - [sp + PT_SEQSTAT] = R0; - - r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ - SP += -12; - pseudo_long_call _trap_c, p5; - SP += 12; - -#ifdef EBIU_ERRMST - /* make sure EBIU_ERRMST is clear */ - p0.l = LO(EBIU_ERRMST); - p0.h = HI(EBIU_ERRMST); - r0.l = (CORE_ERROR | CORE_MERROR); - w[p0] = r0.l; -#endif - - pseudo_long_call _ret_from_exception, p2; - -.Lcommon_restore_all_sys: - RESTORE_ALL_SYS - rti; -ENDPROC(_evt_ivhw) - -/* Interrupt routine for evt2 (NMI). - * For inner circle type details, please see: - * http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:nmi - */ -ENTRY(_evt_nmi) -#ifndef CONFIG_NMI_WATCHDOG -.weak _evt_nmi -#else - /* Not take account of CPLBs, this handler will not return */ - SAVE_ALL_SYS - r0 = sp; - r1 = retn; - [sp + PT_PC] = r1; - trace_buffer_save(p4,r5); - - ANOMALY_283_315_WORKAROUND(p4, r5) - - SP += -12; - call _do_nmi; - SP += 12; -1: - jump 1b; -#endif - rtn; -ENDPROC(_evt_nmi) - -/* interrupt routine for core timer - 6 */ -ENTRY(_evt_timer) - TIMER_INTERRUPT_ENTRY(EVT_IVTMR_P) - -/* interrupt routine for evt7 - 7 */ -ENTRY(_evt_evt7) - INTERRUPT_ENTRY(EVT_IVG7_P) -ENTRY(_evt_evt8) - INTERRUPT_ENTRY(EVT_IVG8_P) -ENTRY(_evt_evt9) - INTERRUPT_ENTRY(EVT_IVG9_P) -ENTRY(_evt_evt10) - INTERRUPT_ENTRY(EVT_IVG10_P) -ENTRY(_evt_evt11) - INTERRUPT_ENTRY(EVT_IVG11_P) -ENTRY(_evt_evt12) - INTERRUPT_ENTRY(EVT_IVG12_P) -ENTRY(_evt_evt13) - INTERRUPT_ENTRY(EVT_IVG13_P) - - - /* interrupt routine for system_call - 15 */ -ENTRY(_evt_system_call) - SAVE_CONTEXT_SYSCALL -#ifdef CONFIG_FRAME_POINTER - fp = 0; -#endif - pseudo_long_call _system_call, p2; - jump .Lcommon_restore_context; -ENDPROC(_evt_system_call) - -#ifdef CONFIG_IPIPE -/* - * __ipipe_call_irqtail: lowers the current priority level to EVT15 - * before running a user-defined routine, then raises the priority - * level to EVT14 to prepare the caller for a normal interrupt - * return through RTI. - * - * We currently use this feature in two occasions: - * - * - before branching to __ipipe_irq_tail_hook as requested by a high - * priority domain after the pipeline delivered an interrupt, - * e.g. such as Xenomai, in order to start its rescheduling - * procedure, since we may not switch tasks when IRQ levels are - * nested on the Blackfin, so we have to fake an interrupt return - * so that we may reschedule immediately. - * - * - before branching to __ipipe_sync_root(), in order to play any interrupt - * pending for the root domain (i.e. the Linux kernel). This lowers - * the core priority level enough so that Linux IRQ handlers may - * never delay interrupts handled by high priority domains; we defer - * those handlers until this point instead. This is a substitute - * to using a threaded interrupt model for the Linux kernel. - * - * r0: address of user-defined routine - * context: caller must have preempted EVT15, hw interrupts must be off. - */ -ENTRY(___ipipe_call_irqtail) - p0 = r0; - r0.l = 1f; - r0.h = 1f; - reti = r0; - rti; -1: - [--sp] = rets; - [--sp] = ( r7:4, p5:3 ); - sp += -12; - call (p0); - sp += 12; - ( r7:4, p5:3 ) = [sp++]; - rets = [sp++]; - -#ifdef CONFIG_DEBUG_HWERR - /* enable irq14 & hwerr interrupt, until we transition to _evt_evt14 */ - r0 = (EVT_IVG14 | EVT_IVHW | \ - EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); -#else - /* Only enable irq14 interrupt, until we transition to _evt_evt14 */ - r0 = (EVT_IVG14 | \ - EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); -#endif - sti r0; - raise 14; /* Branches to _evt_evt14 */ -2: - jump 2b; /* Likely paranoid. */ -ENDPROC(___ipipe_call_irqtail) - -#endif /* CONFIG_IPIPE */ -- cgit v1.2.3-59-g8ed1b