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, 275 deletions

diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
deleted file mode 100644
index a957b374e3a6..000000000000
--- a/arch/frv/kernel/process.c
+++ /dev/null
@@ -1,275 +0,0 @@
-/* process.c: FRV specific parts of process handling
- *
- * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from arch/m68k/kernel/process.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/module.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task.h>
-#include <linux/sched/task_stack.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/elf.h>
-#include <linux/reboot.h>
-#include <linux/interrupt.h>
-#include <linux/pagemap.h>
-#include <linux/rcupdate.h>
-
-#include <asm/asm-offsets.h>
-#include <linux/uaccess.h>
-#include <asm/setup.h>
-#include <asm/pgtable.h>
-#include <asm/tlb.h>
-#include <asm/gdb-stub.h>
-#include <asm/mb-regs.h>
-
-#include "local.h"
-
-asmlinkage void ret_from_fork(void);
-asmlinkage void ret_from_kernel_thread(void);
-
-#include <asm/pgalloc.h>
-
-void (*pm_power_off)(void);
-EXPORT_SYMBOL(pm_power_off);
-
-static void core_sleep_idle(void)
-{
-#ifdef LED_DEBUG_SLEEP
-	/* Show that we're sleeping... */
-	__set_LEDS(0x55aa);
-#endif
-	frv_cpu_core_sleep();
-#ifdef LED_DEBUG_SLEEP
-	/* ... and that we woke up */
-	__set_LEDS(0);
-#endif
-	mb();
-}
-
-void arch_cpu_idle(void)
-{
-	if (!frv_dma_inprogress)
-		core_sleep_idle();
-	else
-		local_irq_enable();
-}
-
-void machine_restart(char * __unused)
-{
-	unsigned long reset_addr;
-#ifdef CONFIG_GDBSTUB
-	gdbstub_exit(0);
-#endif
-
-	if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551)
-		reset_addr = 0xfefff500;
-	else
-		reset_addr = 0xfeff0500;
-
-	/* Software reset. */
-	asm volatile("      dcef @(gr0,gr0),1 ! membar !"
-		     "      sti     %1,@(%0,0) !"
-		     "      nop ! nop ! nop ! nop ! nop ! "
-		     "      nop ! nop ! nop ! nop ! nop ! "
-		     "      nop ! nop ! nop ! nop ! nop ! "
-		     "      nop ! nop ! nop ! nop ! nop ! "
-		     : : "r" (reset_addr), "r" (1) );
-
-	for (;;)
-		;
-}
-
-void machine_halt(void)
-{
-#ifdef CONFIG_GDBSTUB
-	gdbstub_exit(0);
-#endif
-
-	for (;;);
-}
-
-void machine_power_off(void)
-{
-#ifdef CONFIG_GDBSTUB
-	gdbstub_exit(0);
-#endif
-
-	for (;;);
-}
-
-void flush_thread(void)
-{
-	/* nothing */
-}
-
-inline unsigned long user_stack(const struct pt_regs *regs)
-{
-	while (regs->next_frame)
-		regs = regs->next_frame;
-	return user_mode(regs) ? regs->sp : 0;
-}
-
-/*
- * set up the kernel stack and exception frames for a new process
- */
-int copy_thread(unsigned long clone_flags,
-		unsigned long usp, unsigned long arg,
-		struct task_struct *p)
-{
-	struct pt_regs *childregs;
-
-	childregs = (struct pt_regs *)
-		(task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE);
-
-	/* set up the userspace frame (the only place that the USP is stored) */
-	*childregs = *current_pt_regs();
-
-	p->thread.frame	 = childregs;
-	p->thread.curr	 = p;
-	p->thread.sp	 = (unsigned long) childregs;
-	p->thread.fp	 = 0;
-	p->thread.lr	 = 0;
-	p->thread.frame0 = childregs;
-
-	if (unlikely(p->flags & PF_KTHREAD)) {
-		childregs->gr9 = usp; /* function */
-		childregs->gr8 = arg;
-		p->thread.pc = (unsigned long) ret_from_kernel_thread;
-		save_user_regs(p->thread.user);
-		return 0;
-	}
-	if (usp)
-		childregs->sp = usp;
-	childregs->next_frame	= NULL;
-
-	p->thread.pc = (unsigned long) ret_from_fork;
-
-	/* the new TLS pointer is passed in as arg #5 to sys_clone() */
-	if (clone_flags & CLONE_SETTLS)
-		childregs->gr29 = childregs->gr12;
-
-	save_user_regs(p->thread.user);
-
-	return 0;
-} /* end copy_thread() */
-
-unsigned long get_wchan(struct task_struct *p)
-{
-	struct pt_regs *regs0;
-	unsigned long fp, pc;
-	unsigned long stack_limit;
-	int count = 0;
-	if (!p || p == current || p->state == TASK_RUNNING)
-		return 0;
-
-	stack_limit = (unsigned long) (p + 1);
-	fp = p->thread.fp;
-	regs0 = p->thread.frame0;
-
-	do {
-		if (fp < stack_limit || fp >= (unsigned long) regs0 || fp & 3)
-			return 0;
-
-		pc = ((unsigned long *) fp)[2];
-
-		/* FIXME: This depends on the order of these functions. */
-		if (!in_sched_functions(pc))
-			return pc;
-
-		fp = *(unsigned long *) fp;
-	} while (count++ < 16);
-
-	return 0;
-}
-
-int elf_check_arch(const struct elf32_hdr *hdr)
-{
-	unsigned long hsr0 = __get_HSR(0);
-	unsigned long psr = __get_PSR();
-
-	if (hdr->e_machine != EM_FRV)
-		return 0;
-
-	switch (hdr->e_flags & EF_FRV_GPR_MASK) {
-	case EF_FRV_GPR64:
-		if ((hsr0 & HSR0_GRN) == HSR0_GRN_32)
-			return 0;
-	case EF_FRV_GPR32:
-	case 0:
-		break;
-	default:
-		return 0;
-	}
-
-	switch (hdr->e_flags & EF_FRV_FPR_MASK) {
-	case EF_FRV_FPR64:
-		if ((hsr0 & HSR0_FRN) == HSR0_FRN_32)
-			return 0;
-	case EF_FRV_FPR32:
-	case EF_FRV_FPR_NONE:
-	case 0:
-		break;
-	default:
-		return 0;
-	}
-
-	if ((hdr->e_flags & EF_FRV_MULADD) == EF_FRV_MULADD)
-		if (PSR_IMPLE(psr) != PSR_IMPLE_FR405 &&
-		    PSR_IMPLE(psr) != PSR_IMPLE_FR451)
-			return 0;
-
-	switch (hdr->e_flags & EF_FRV_CPU_MASK) {
-	case EF_FRV_CPU_GENERIC:
-		break;
-	case EF_FRV_CPU_FR300:
-	case EF_FRV_CPU_SIMPLE:
-	case EF_FRV_CPU_TOMCAT:
-	default:
-		return 0;
-	case EF_FRV_CPU_FR400:
-		if (PSR_IMPLE(psr) != PSR_IMPLE_FR401 &&
-		    PSR_IMPLE(psr) != PSR_IMPLE_FR405 &&
-		    PSR_IMPLE(psr) != PSR_IMPLE_FR451 &&
-		    PSR_IMPLE(psr) != PSR_IMPLE_FR551)
-			return 0;
-		break;
-	case EF_FRV_CPU_FR450:
-		if (PSR_IMPLE(psr) != PSR_IMPLE_FR451)
-			return 0;
-		break;
-	case EF_FRV_CPU_FR500:
-		if (PSR_IMPLE(psr) != PSR_IMPLE_FR501)
-			return 0;
-		break;
-	case EF_FRV_CPU_FR550:
-		if (PSR_IMPLE(psr) != PSR_IMPLE_FR551)
-			return 0;
-		break;
-	}
-
-	return 1;
-}
-
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
-{
-	memcpy(fpregs,
-	       &current->thread.user->f,
-	       sizeof(current->thread.user->f));
-	return 1;
-}