arch: remove frv port

The Fujitsu FRV kernel port has been around for a long time, but has not
seen regular updates in several years and instead was marked 'Orphaned'
in 2016 by long-time maintainer David Howells.

The SoC product line apparently is apparently still around in the form
of the Socionext Milbeaut image processor, but this one no longer uses
the FRV CPU cores.

This removes all FRV specific files from the kernel.

Link: http://www.socionext.com/en/products/assp/milbeaut/
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 426 deletions

diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
deleted file mode 100644
index bf6e07a7a1b1..000000000000
--- a/arch/frv/kernel/signal.c
+++ /dev/null
@@ -1,426 +0,0 @@
-/* signal.c: FRV specific bits of signal handling
- *
- * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from arch/m68k/kernel/signal.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/personality.h>
-#include <linux/tracehook.h>
-#include <asm/ucontext.h>
-#include <linux/uaccess.h>
-#include <asm/cacheflush.h>
-
-#define DEBUG_SIG 0
-
-struct fdpic_func_descriptor {
-	unsigned long	text;
-	unsigned long	GOT;
-};
-
-/*
- * Do a signal return; undo the signal stack.
- */
-
-struct sigframe
-{
-	__sigrestore_t pretcode;
-	int sig;
-	struct sigcontext sc;
-	unsigned long extramask[_NSIG_WORDS-1];
-	uint32_t retcode[2];
-};
-
-struct rt_sigframe
-{
-	__sigrestore_t pretcode;
-	int sig;
-	struct siginfo __user *pinfo;
-	void __user *puc;
-	struct siginfo info;
-	struct ucontext uc;
-	uint32_t retcode[2];
-};
-
-static int restore_sigcontext(struct sigcontext __user *sc, int *_gr8)
-{
-	struct user_context *user = current->thread.user;
-	unsigned long tbr, psr;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current->restart_block.fn = do_no_restart_syscall;
-
-	tbr = user->i.tbr;
-	psr = user->i.psr;
-	if (copy_from_user(user, &sc->sc_context, sizeof(sc->sc_context)))
-		goto badframe;
-	user->i.tbr = tbr;
-	user->i.psr = psr;
-
-	restore_user_regs(user);
-
-	user->i.syscallno = -1;		/* disable syscall checks */
-
-	*_gr8 = user->i.gr[8];
-	return 0;
-
- badframe:
-	return 1;
-}
-
-asmlinkage int sys_sigreturn(void)
-{
-	struct sigframe __user *frame = (struct sigframe __user *) __frame->sp;
-	sigset_t set;
-	int gr8;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__get_user(set.sig[0], &frame->sc.sc_oldmask))
-		goto badframe;
-
-	if (_NSIG_WORDS > 1 &&
-	    __copy_from_user(&set.sig[1], &frame->extramask, sizeof(frame->extramask)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(&frame->sc, &gr8))
-		goto badframe;
-	return gr8;
-
- badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-asmlinkage int sys_rt_sigreturn(void)
-{
-	struct rt_sigframe __user *frame = (struct rt_sigframe __user *) __frame->sp;
-	sigset_t set;
-	int gr8;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
-		goto badframe;
-
-	if (restore_altstack(&frame->uc.uc_stack))
-		goto badframe;
-
-	return gr8;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * Set up a signal frame
- */
-static int setup_sigcontext(struct sigcontext __user *sc, unsigned long mask)
-{
-	save_user_regs(current->thread.user);
-
-	if (copy_to_user(&sc->sc_context, current->thread.user, sizeof(sc->sc_context)) != 0)
-		goto badframe;
-
-	/* non-iBCS2 extensions.. */
-	if (__put_user(mask, &sc->sc_oldmask) < 0)
-		goto badframe;
-
-	return 0;
-
- badframe:
-	return 1;
-}
-
-/*****************************************************************************/
-/*
- * Determine which stack to use..
- */
-static inline void __user *get_sigframe(struct ksignal *ksig,
-					size_t frame_size)
-{
-	unsigned long sp = sigsp(__frame->sp, ksig);
-
-	return (void __user *) ((sp - frame_size) & ~7UL);
-
-} /* end get_sigframe() */
-
-/*****************************************************************************/
-/*
- *
- */
-static int setup_frame(struct ksignal *ksig, sigset_t *set)
-{
-	struct sigframe __user *frame;
-	int sig = ksig->sig;
-
-	frame = get_sigframe(ksig, sizeof(*frame));
-
-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig, &frame->sig) < 0)
-		return -EFAULT;
-
-	if (setup_sigcontext(&frame->sc, set->sig[0]))
-		return -EFAULT;
-
-	if (_NSIG_WORDS > 1) {
-		if (__copy_to_user(frame->extramask, &set->sig[1],
-				   sizeof(frame->extramask)))
-			return -EFAULT;
-	}
-
-	/* Set up to return from userspace.  If provided, use a stub
-	 * already in userspace.  */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode) < 0)
-			return -EFAULT;
-	}
-	else {
-		/* Set up the following code on the stack:
-		 *	setlos	#__NR_sigreturn,gr7
-		 *	tira	gr0,0
-		 */
-		if (__put_user((__sigrestore_t)frame->retcode, &frame->pretcode) ||
-		    __put_user(0x8efc0000|__NR_sigreturn, &frame->retcode[0]) ||
-		    __put_user(0xc0700000, &frame->retcode[1]))
-			return -EFAULT;
-
-		flush_icache_range((unsigned long) frame->retcode,
-				   (unsigned long) (frame->retcode + 2));
-	}
-
-	/* Set up registers for the signal handler */
-	if (current->personality & FDPIC_FUNCPTRS) {
-		struct fdpic_func_descriptor __user *funcptr =
-			(struct fdpic_func_descriptor __user *) ksig->ka.sa.sa_handler;
-		struct fdpic_func_descriptor desc;
-		if (copy_from_user(&desc, funcptr, sizeof(desc)))
-			return -EFAULT;
-		__frame->pc = desc.text;
-		__frame->gr15 = desc.GOT;
-	} else {
-		__frame->pc   = (unsigned long) ksig->ka.sa.sa_handler;
-		__frame->gr15 = 0;
-	}
-
-	__frame->sp   = (unsigned long) frame;
-	__frame->lr   = (unsigned long) &frame->retcode;
-	__frame->gr8  = sig;
-
-#if DEBUG_SIG
-	printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
-	       sig, current->comm, current->pid, frame, __frame->pc,
-	       frame->pretcode);
-#endif
-
-	return 0;
-} /* end setup_frame() */
-
-/*****************************************************************************/
-/*
- *
- */
-static int setup_rt_frame(struct ksignal *ksig, sigset_t *set)
-{
-	struct rt_sigframe __user *frame;
-	int sig = ksig->sig;
-
-	frame = get_sigframe(ksig, sizeof(*frame));
-
-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig,		&frame->sig) ||
-	    __put_user(&frame->info,	&frame->pinfo) ||
-	    __put_user(&frame->uc,	&frame->puc))
-		return -EFAULT;
-
-	if (copy_siginfo_to_user(&frame->info, &ksig->info))
-		return -EFAULT;
-
-	/* Create the ucontext.  */
-	if (__put_user(0, &frame->uc.uc_flags) ||
-	    __put_user(NULL, &frame->uc.uc_link) ||
-	    __save_altstack(&frame->uc.uc_stack, __frame->sp))
-		return -EFAULT;
-
-	if (setup_sigcontext(&frame->uc.uc_mcontext, set->sig[0]))
-		return -EFAULT;
-
-	if (__copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))
-		return -EFAULT;
-
-	/* Set up to return from userspace.  If provided, use a stub
-	 * already in userspace.  */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
-			return -EFAULT;
-	}
-	else {
-		/* Set up the following code on the stack:
-		 *	setlos	#__NR_sigreturn,gr7
-		 *	tira	gr0,0
-		 */
-		if (__put_user((__sigrestore_t)frame->retcode, &frame->pretcode) ||
-		    __put_user(0x8efc0000|__NR_rt_sigreturn, &frame->retcode[0]) ||
-		    __put_user(0xc0700000, &frame->retcode[1]))
-			return -EFAULT;
-
-		flush_icache_range((unsigned long) frame->retcode,
-				   (unsigned long) (frame->retcode + 2));
-	}
-
-	/* Set up registers for signal handler */
-	if (current->personality & FDPIC_FUNCPTRS) {
-		struct fdpic_func_descriptor __user *funcptr =
-			(struct fdpic_func_descriptor __user *) ksig->ka.sa.sa_handler;
-		struct fdpic_func_descriptor desc;
-		if (copy_from_user(&desc, funcptr, sizeof(desc)))
-			return -EFAULT;
-		__frame->pc = desc.text;
-		__frame->gr15 = desc.GOT;
-	} else {
-		__frame->pc   = (unsigned long) ksig->ka.sa.sa_handler;
-		__frame->gr15 = 0;
-	}
-
-	__frame->sp  = (unsigned long) frame;
-	__frame->lr  = (unsigned long) &frame->retcode;
-	__frame->gr8 = sig;
-	__frame->gr9 = (unsigned long) &frame->info;
-
-#if DEBUG_SIG
-	printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
-	       sig, current->comm, current->pid, frame, __frame->pc,
-	       frame->pretcode);
-#endif
-	return 0;
-
-} /* end setup_rt_frame() */
-
-/*****************************************************************************/
-/*
- * OK, we're invoking a handler
- */
-static void handle_signal(struct ksignal *ksig)
-{
-	sigset_t *oldset = sigmask_to_save();
-	int ret;
-
-	/* Are we from a system call? */
-	if (__frame->syscallno != -1) {
-		/* If so, check system call restarting.. */
-		switch (__frame->gr8) {
-		case -ERESTART_RESTARTBLOCK:
-		case -ERESTARTNOHAND:
-			__frame->gr8 = -EINTR;
-			break;
-
-		case -ERESTARTSYS:
-			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
-				__frame->gr8 = -EINTR;
-				break;
-			}
-
-			/* fallthrough */
-		case -ERESTARTNOINTR:
-			__frame->gr8 = __frame->orig_gr8;
-			__frame->pc -= 4;
-		}
-		__frame->syscallno = -1;
-	}
-
-	/* Set up the stack frame */
-	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
-		ret = setup_rt_frame(ksig, oldset);
-	else
-		ret = setup_frame(ksig, oldset);
-
-	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
-} /* end handle_signal() */
-
-/*****************************************************************************/
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- */
-static void do_signal(void)
-{
-	struct ksignal ksig;
-
-	if (get_signal(&ksig)) {
-		handle_signal(&ksig);
-		return;
-	}
-
-	/* Did we come from a system call? */
-	if (__frame->syscallno != -1) {
-		/* Restart the system call - no handlers present */
-		switch (__frame->gr8) {
-		case -ERESTARTNOHAND:
-		case -ERESTARTSYS:
-		case -ERESTARTNOINTR:
-			__frame->gr8 = __frame->orig_gr8;
-			__frame->pc -= 4;
-			break;
-
-		case -ERESTART_RESTARTBLOCK:
-			__frame->gr7 = __NR_restart_syscall;
-			__frame->pc -= 4;
-			break;
-		}
-		__frame->syscallno = -1;
-	}
-
-	/* if there's no signal to deliver, we just put the saved sigmask
-	 * back */
-	restore_saved_sigmask();
-} /* end do_signal() */
-
-/*****************************************************************************/
-/*
- * notification of userspace execution resumption
- * - triggered by the TIF_WORK_MASK flags
- */
-asmlinkage void do_notify_resume(__u32 thread_info_flags)
-{
-	/* pending single-step? */
-	if (thread_info_flags & _TIF_SINGLESTEP)
-		clear_thread_flag(TIF_SINGLESTEP);
-
-	/* deal with pending signal delivery */
-	if (thread_info_flags & _TIF_SIGPENDING)
-		do_signal();
-
-	/* deal with notification on about to resume userspace execution */
-	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
-		clear_thread_flag(TIF_NOTIFY_RESUME);
-		tracehook_notify_resume(__frame);
-	}
-
-} /* end do_notify_resume() */