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https://github.com/freebsd/freebsd-src
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Remove the arm FIQ support
It isn't used, and only masks/unmasks FIQs on the local CPU so will be broken on SMP. Reviewed by: mmel Differential Revision: https://reviews.freebsd.org/D33804
This commit is contained in:
Andrew Turner
parent
86bafddd61
commit
6abad5b606
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@ -90,7 +90,7 @@ static void
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configure_final(void *dummy)
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{
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enable_interrupts(PSR_I | PSR_F);
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enable_interrupts(PSR_I);
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cninit_finish();
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cold = 0;
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}
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@ -165,12 +165,12 @@ _C_LABEL(dtrace_invop_jump_addr):
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#define DO_AST \
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ldr r0, [sp]; /* Get the SPSR from stack */ \
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mrs r4, cpsr; /* save CPSR */ \
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orr r1, r4, #(PSR_I|PSR_F); \
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orr r1, r4, #(PSR_I); \
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msr cpsr_c, r1; /* Disable interrupts */ \
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and r0, r0, #(PSR_MODE); /* Returning to USR mode? */ \
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teq r0, #(PSR_USR32_MODE); \
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bne 2f; /* Nope, get out now */ \
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bic r4, r4, #(PSR_I|PSR_F); \
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bic r4, r4, #(PSR_I); \
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1: GET_CURTHREAD_PTR(r5); \
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ldr r1, [r5, #(TD_AST)]; \
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teq r1, #0; \
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@ -178,7 +178,7 @@ _C_LABEL(dtrace_invop_jump_addr):
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msr cpsr_c, r4; /* Restore interrupts */ \
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mov r0, sp; \
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bl _C_LABEL(ast); /* ast(frame) */ \
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orr r0, r4, #(PSR_I|PSR_F); \
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orr r0, r4, #(PSR_I); \
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msr cpsr_c, r0; \
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b 1b; \
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2:
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@ -315,21 +315,6 @@ ASENTRY_NP(irq_entry)
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b _C_LABEL(intr_irq_handler)/* trapframe to the handler. */
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END(irq_entry)
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/*
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* Entry point for an FIQ interrupt.
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*
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* We don't currently support FIQ handlers very much. Something can
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* install itself in the FIQ vector using code (that may or may not work
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* these days) in fiq.c. If nobody does that and an FIQ happens, this
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* default handler just disables FIQs and otherwise ignores it.
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*/
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ASENTRY_NP(fiq_entry)
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mrs r8, cpsr /* FIQ handling isn't supported, */
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bic r8, #(PSR_F) /* just disable FIQ and return. */
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msr cpsr_c, r8 /* The r8 we trash here is the */
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subs pc, lr, #4 /* banked FIQ-mode r8. */
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END(fiq_entry)
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/*
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* Entry point for an Address Exception exception.
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* This is an arm26 exception that should never happen.
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@ -378,8 +363,6 @@ _C_LABEL(page0):
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ldr pc, .Ldata_abort_entry
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ldr pc, .Laddr_exception_entry
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ldr pc, .Lirq_entry
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.fiqv: ldr pc, .Lfiq_entry
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.space 256 /* room for some fiq handler code */
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_C_LABEL(page0_data):
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.Lreset_entry: .word reset_entry
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@ -389,18 +372,4 @@ _C_LABEL(page0_data):
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.Ldata_abort_entry: .word data_abort_entry
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.Laddr_exception_entry: .word addr_exception_entry
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.Lirq_entry: .word irq_entry
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.Lfiq_entry: .word fiq_entry
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/*
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* These items are used by the code in fiq.c to install what it calls the
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* "null" handler. It's actually our default vector entry that just jumps
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* to the default handler which just disables FIQs and returns.
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*/
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.global _C_LABEL(fiq_nullhandler_code), _C_LABEL(fiq_nullhandler_size)
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_C_LABEL(fiq_nullhandler_code):
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.word .fiqv
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_C_LABEL(fiq_nullhandler_size):
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.word 4
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@ -1,163 +0,0 @@
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/* $NetBSD: fiq.c,v 1.5 2002/04/03 23:33:27 thorpej Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <machine/armreg.h>
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#include <machine/cpufunc.h>
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#include <machine/fiq.h>
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#include <vm/vm.h>
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#include <machine/pcb.h>
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#include <vm/pmap.h>
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#include <machine/cpu.h>
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TAILQ_HEAD(, fiqhandler) fiqhandler_stack =
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TAILQ_HEAD_INITIALIZER(fiqhandler_stack);
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extern char *fiq_nullhandler_code;
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extern uint32_t fiq_nullhandler_size;
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/*
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* fiq_installhandler:
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*
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* Actually install the FIQ handler down at the FIQ vector.
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*
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* The FIQ vector is fixed by the hardware definition as the
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* seventh 32-bit word in the vector page.
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*
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* Note: If the FIQ is invoked via an extra layer of
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* indirection, the actual FIQ code store lives in the
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* data segment, so there is no need to manipulate
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* the vector page's protection.
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*/
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static void
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fiq_installhandler(void *func, size_t size)
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{
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const uint32_t fiqvector = 7 * sizeof(uint32_t);
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memcpy((void *)(vector_page + fiqvector), func, size);
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icache_sync((vm_offset_t) fiqvector, size);
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}
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/*
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* fiq_claim:
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*
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* Claim the FIQ vector.
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*/
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int
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fiq_claim(struct fiqhandler *fh)
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{
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struct fiqhandler *ofh;
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u_int oldirqstate;
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int error = 0;
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if (fh->fh_size > 0x100)
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return (EFBIG);
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oldirqstate = disable_interrupts(PSR_F);
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if ((ofh = TAILQ_FIRST(&fiqhandler_stack)) != NULL) {
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if ((ofh->fh_flags & FH_CANPUSH) == 0) {
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error = EBUSY;
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goto out;
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}
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/* Save the previous FIQ handler's registers. */
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if (ofh->fh_regs != NULL)
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fiq_getregs(ofh->fh_regs);
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}
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/* Set FIQ mode registers to ours. */
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if (fh->fh_regs != NULL)
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fiq_setregs(fh->fh_regs);
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TAILQ_INSERT_HEAD(&fiqhandler_stack, fh, fh_list);
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/* Now copy the actual handler into place. */
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fiq_installhandler(fh->fh_func, fh->fh_size);
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/* Make sure FIQs are enabled when we return. */
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oldirqstate &= ~PSR_F;
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out:
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restore_interrupts(oldirqstate);
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return (error);
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}
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/*
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* fiq_release:
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*
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* Release the FIQ vector.
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*/
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void
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fiq_release(struct fiqhandler *fh)
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{
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u_int oldirqstate;
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struct fiqhandler *ofh;
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oldirqstate = disable_interrupts(PSR_F);
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/*
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* If we are the currently active FIQ handler, then we
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* need to save our registers and pop the next one back
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* into the vector.
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*/
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if (fh == TAILQ_FIRST(&fiqhandler_stack)) {
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if (fh->fh_regs != NULL)
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fiq_getregs(fh->fh_regs);
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TAILQ_REMOVE(&fiqhandler_stack, fh, fh_list);
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if ((ofh = TAILQ_FIRST(&fiqhandler_stack)) != NULL) {
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if (ofh->fh_regs != NULL)
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fiq_setregs(ofh->fh_regs);
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fiq_installhandler(ofh->fh_func, ofh->fh_size);
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}
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} else
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TAILQ_REMOVE(&fiqhandler_stack, fh, fh_list);
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if (TAILQ_FIRST(&fiqhandler_stack) == NULL) {
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/* Copy the NULL handler back down into the vector. */
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fiq_installhandler(fiq_nullhandler_code, fiq_nullhandler_size);
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/* Make sure FIQs are disabled when we return. */
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oldirqstate |= PSR_F;
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}
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restore_interrupts(oldirqstate);
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}
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@ -1,92 +0,0 @@
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/* $NetBSD: fiq_subr.S,v 1.3 2002/04/12 18:50:31 thorpej Exp $ */
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/*-
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* Copyright (c) 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
|
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
|
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <machine/asm.h>
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#include <machine/armreg.h>
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/*
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* MODE_CHANGE_NOP should be inserted between a mode change and a
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* banked register (R8--R15) access.
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*/
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#if defined(CPU_ARM2) || defined(CPU_ARM250)
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#define MODE_CHANGE_NOP mov r0, r0
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#else
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#define MODE_CHANGE_NOP /* Data sheet says ARM3 doesn't need it */
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#endif
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#define SWITCH_TO_FIQ_MODE \
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mrs r2, cpsr ; \
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mov r3, r2 ; \
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bic r2, r2, #(PSR_MODE) ; \
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orr r2, r2, #(PSR_FIQ32_MODE) ; \
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msr cpsr_fsxc, r2
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#define BACK_TO_SVC_MODE \
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msr cpsr_fsxc, r3
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/*
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* fiq_getregs:
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*
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* Fetch the FIQ mode banked registers into the fiqhandler
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* structure.
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*/
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ENTRY(fiq_getregs)
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SWITCH_TO_FIQ_MODE
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stmia r0, {r8-r13}
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BACK_TO_SVC_MODE
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RET
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END(fiq_getregs)
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/*
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* fiq_setregs:
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*
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* Load the FIQ mode banked registers from the fiqhandler
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* structure.
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*/
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ENTRY(fiq_setregs)
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SWITCH_TO_FIQ_MODE
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ldmia r0, {r8-r13}
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BACK_TO_SVC_MODE
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RET
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END(fiq_setregs)
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@ -314,7 +314,7 @@ spinlock_enter(void)
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td = curthread;
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if (td->td_md.md_spinlock_count == 0) {
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cspr = disable_interrupts(PSR_I | PSR_F);
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cspr = disable_interrupts(PSR_I);
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td->td_md.md_spinlock_count = 1;
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td->td_md.md_saved_cspr = cspr;
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critical_enter();
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@ -3364,7 +3364,7 @@ pmap_change_pte1(pmap_t pmap, pt1_entry_t *pte1p, vm_offset_t va,
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* will be affected by the broken mapping, disable interrupts
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* until the mapping change is completed.
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*/
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cspr = disable_interrupts(PSR_I | PSR_F);
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cspr = disable_interrupts(PSR_I);
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pte1_clear(pte1p);
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pmap_tlb_flush_pte1(pmap, va, npte1);
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pte1_store(pte1p, npte1);
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@ -3389,7 +3389,7 @@ pmap_change_pte1(pmap_t pmap, pt1_entry_t *pte1p, vm_offset_t va,
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* mappings. It's absolutely safe in UP case when interrupts
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* are disabled.
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*/
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cspr = disable_interrupts(PSR_I | PSR_F);
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cspr = disable_interrupts(PSR_I);
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pte1_clear(pte1p);
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pmap_tlb_flush_pte1(pmap, va, npte1);
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pte1_store(pte1p, npte1);
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|
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@ -160,8 +160,6 @@ swi_handler(struct trapframe *frame)
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if (td->td_md.md_spinlock_count == 0) {
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if (__predict_true(frame->tf_spsr & PSR_I) == 0)
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enable_interrupts(PSR_I);
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if (__predict_true(frame->tf_spsr & PSR_F) == 0)
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enable_interrupts(PSR_F);
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}
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syscall(td, frame);
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|
|
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@ -408,8 +408,6 @@ abort_handler(struct trapframe *tf, int prefetch)
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if (td->td_md.md_spinlock_count == 0) {
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if (__predict_true(tf->tf_spsr & PSR_I) == 0)
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enable_interrupts(PSR_I);
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if (__predict_true(tf->tf_spsr & PSR_F) == 0)
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enable_interrupts(PSR_F);
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}
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p = td->td_proc;
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@ -565,7 +563,7 @@ abort_fatal(struct trapframe *tf, u_int idx, u_int fsr, u_int far,
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mode = usermode ? "user" : "kernel";
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rw_mode = fsr & FSR_WNR ? "write" : "read";
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disable_interrupts(PSR_I|PSR_F);
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disable_interrupts(PSR_I);
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if (td != NULL) {
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printf("Fatal %s mode data abort: '%s' on %s\n", mode,
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|
|
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@ -226,8 +226,6 @@ undefinedinstruction(struct trapframe *frame)
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/* Enable interrupts if they were enabled before the exception. */
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if (__predict_true(frame->tf_spsr & PSR_I) == 0)
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enable_interrupts(PSR_I);
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if (__predict_true(frame->tf_spsr & PSR_F) == 0)
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enable_interrupts(PSR_F);
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VM_CNT_INC(v_trap);
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|
|
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@ -729,7 +729,7 @@ get_cyclecount(void)
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#define cpu_spinwait() /* nothing */
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#define cpu_lock_delay() DELAY(1)
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#define ARM_NVEC 8
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#define ARM_NVEC 7
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#define ARM_VEC_ALL 0xffffffff
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extern vm_offset_t vector_page;
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|
|
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@ -1,71 +0,0 @@
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/* $NetBSD: fiq.h,v 1.1 2001/12/20 01:20:23 thorpej Exp $ */
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|
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/*-
|
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* SPDX-License-Identifier: BSD-4-Clause
|
||||
*
|
||||
* Copyright (c) 2001 Wasabi Systems, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed for the NetBSD Project by
|
||||
* Wasabi Systems, Inc.
|
||||
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_FIQ_H_
|
||||
#define _MACHINE_FIQ_H_
|
||||
|
||||
#include <sys/queue.h>
|
||||
|
||||
struct fiqregs {
|
||||
u_int fr_r8; /* FIQ mode r8 */
|
||||
u_int fr_r9; /* FIQ mode r9 */
|
||||
u_int fr_r10; /* FIQ mode r10 */
|
||||
u_int fr_r11; /* FIQ mode r11 */
|
||||
u_int fr_r12; /* FIQ mode r12 */
|
||||
u_int fr_r13; /* FIQ mode r13 */
|
||||
};
|
||||
|
||||
struct fiqhandler {
|
||||
TAILQ_ENTRY(fiqhandler) fh_list;/* link in the FIQ handler stack */
|
||||
void *fh_func; /* FIQ handler routine */
|
||||
size_t fh_size; /* size of FIQ handler */
|
||||
int fh_flags; /* flags; see below */
|
||||
struct fiqregs *fh_regs; /* pointer to regs structure */
|
||||
};
|
||||
|
||||
#define FH_CANPUSH 0x01 /* can push this handler out of the way */
|
||||
|
||||
int fiq_claim(struct fiqhandler *);
|
||||
void fiq_release(struct fiqhandler *);
|
||||
|
||||
void fiq_getregs(struct fiqregs *);
|
||||
void fiq_setregs(struct fiqregs *);
|
||||
|
||||
#endif /* _MACHINE_FIQ_H_ */
|
||||
|
|
@ -25,8 +25,6 @@ arm/arm/elf_machdep.c standard
|
|||
arm/arm/elf_note.S standard
|
||||
arm/arm/exception.S standard
|
||||
arm/arm/exec_machdep.c standard
|
||||
arm/arm/fiq.c standard
|
||||
arm/arm/fiq_subr.S standard
|
||||
arm/arm/fusu.S standard
|
||||
arm/arm/gdb_machdep.c optional gdb
|
||||
arm/arm/generic_timer.c optional generic_timer
|
||||
|
|
|
|||
Loading…
Reference in a new issue