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authorArnd Bergmann <arnd@arndb.de>2018-03-07 22:23:24 +0100
committerArnd Bergmann <arnd@arndb.de>2018-03-16 10:55:47 +0100
commit4ba66a9760722ccbb691b8f7116cad2f791cca7b (patch)
treee29f9624ad0b13aa11860e39440bbc5e24d18a30 /arch/blackfin/mach-common/interrupt.S
parentarch: remove score port (diff)
downloadlinux-dev-4ba66a9760722ccbb691b8f7116cad2f791cca7b.tar.xz
linux-dev-4ba66a9760722ccbb691b8f7116cad2f791cca7b.zip
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 <Aaron.Wu@analog.com> Acked-by: Bryan Wu <cooloney@gmail.com> Cc: Steven Miao <realmz6@gmail.com> Cc: Mike Frysinger <vapier@chromium.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to '')
-rw-r--r--arch/blackfin/mach-common/interrupt.S326
1 files changed, 0 insertions, 326 deletions
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 <jeff@ryeham.ee.ryerson.ca>
- * Kenneth Albanowski <kjahds@kjahds.com>
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <asm/blackfin.h>
-#include <mach/irq.h>
-#include <linux/linkage.h>
-#include <asm/entry.h>
-#include <asm/asm-offsets.h>
-#include <asm/trace.h>
-#include <asm/traps.h>
-#include <asm/thread_info.h>
-
-#include <asm/context.S>
-
-.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 */