arch: remove m32r port

The Mitsubishi/Renesas m32r architecture has been around for many years,
but the Linux port has been obsolete for a very long time as well, with
the last significant updates done for linux-2.6.14.

While some m32r microcontrollers are still being marketed by Renesas,
those are apparently no longer possible to support, mainly due to the
lack of an external memory interface.

Hirokazu Takata was the maintainer until the architecture got marked
Orphaned in 2014.

Link: http://www.linux-m32r.org/
Link: https://www.renesas.com/en-eu/products/microcontrollers-microprocessors/m32r.html
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 324 deletions

diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c
deleted file mode 100644
index a6f300a208bd..000000000000
--- a/arch/m32r/kernel/traps.c
+++ /dev/null
@@ -1,324 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/m32r/kernel/traps.c
- *
- *  Copyright (C) 2001, 2002  Hirokazu Takata, Hiroyuki Kondo,
- *                            Hitoshi Yamamoto
- */
-
-/*
- * 'traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/kallsyms.h>
-#include <linux/stddef.h>
-#include <linux/ptrace.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/cpu.h>
-
-#include <asm/page.h>
-#include <asm/processor.h>
-
-#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <linux/atomic.h>
-
-#include <asm/smp.h>
-
-#include <linux/module.h>
-
-asmlinkage void alignment_check(void);
-asmlinkage void ei_handler(void);
-asmlinkage void rie_handler(void);
-asmlinkage void debug_trap(void);
-asmlinkage void cache_flushing_handler(void);
-asmlinkage void ill_trap(void);
-
-#ifdef CONFIG_SMP
-extern void smp_reschedule_interrupt(void);
-extern void smp_invalidate_interrupt(void);
-extern void smp_call_function_interrupt(void);
-extern void smp_ipi_timer_interrupt(void);
-extern void smp_flush_cache_all_interrupt(void);
-extern void smp_call_function_single_interrupt(void);
-
-/*
- * for Boot AP function
- */
-asm (
-	"	.section .eit_vector4,\"ax\"	\n"
-	"	.global _AP_RE			\n"
-	"	.global startup_AP		\n"
-	"_AP_RE:				\n"
-	"	.fill 32, 4, 0			\n"
-	"_AP_EI: bra	startup_AP		\n"
-	"	.previous			\n"
-);
-#endif  /* CONFIG_SMP */
-
-extern unsigned long	eit_vector[];
-#define BRA_INSN(func, entry)	\
-	((unsigned long)func - (unsigned long)eit_vector - entry*4)/4 \
-	+ 0xff000000UL
-
-static void set_eit_vector_entries(void)
-{
-	extern void default_eit_handler(void);
-	extern void system_call(void);
-	extern void pie_handler(void);
-	extern void ace_handler(void);
-	extern void tme_handler(void);
-	extern void _flush_cache_copyback_all(void);
-
-	eit_vector[0] = 0xd0c00001; /* seth r0, 0x01 */
-	eit_vector[1] = BRA_INSN(default_eit_handler, 1);
-	eit_vector[4] = 0xd0c00010; /* seth r0, 0x10 */
-	eit_vector[5] = BRA_INSN(default_eit_handler, 5);
-	eit_vector[8] = BRA_INSN(rie_handler, 8);
-	eit_vector[12] = BRA_INSN(alignment_check, 12);
-	eit_vector[16] = BRA_INSN(ill_trap, 16);
-	eit_vector[17] = BRA_INSN(debug_trap, 17);
-	eit_vector[18] = BRA_INSN(system_call, 18);
-	eit_vector[19] = BRA_INSN(ill_trap, 19);
-	eit_vector[20] = BRA_INSN(ill_trap, 20);
-	eit_vector[21] = BRA_INSN(ill_trap, 21);
-	eit_vector[22] = BRA_INSN(ill_trap, 22);
-	eit_vector[23] = BRA_INSN(ill_trap, 23);
-	eit_vector[24] = BRA_INSN(ill_trap, 24);
-	eit_vector[25] = BRA_INSN(ill_trap, 25);
-	eit_vector[26] = BRA_INSN(ill_trap, 26);
-	eit_vector[27] = BRA_INSN(ill_trap, 27);
-	eit_vector[28] = BRA_INSN(cache_flushing_handler, 28);
-	eit_vector[29] = BRA_INSN(ill_trap, 29);
-	eit_vector[30] = BRA_INSN(ill_trap, 30);
-	eit_vector[31] = BRA_INSN(ill_trap, 31);
-	eit_vector[32] = BRA_INSN(ei_handler, 32);
-	eit_vector[64] = BRA_INSN(pie_handler, 64);
-#ifdef CONFIG_MMU
-	eit_vector[68] = BRA_INSN(ace_handler, 68);
-	eit_vector[72] = BRA_INSN(tme_handler, 72);
-#endif /* CONFIG_MMU */
-#ifdef CONFIG_SMP
-	eit_vector[184] = (unsigned long)smp_reschedule_interrupt;
-	eit_vector[185] = (unsigned long)smp_invalidate_interrupt;
-	eit_vector[186] = (unsigned long)smp_call_function_interrupt;
-	eit_vector[187] = (unsigned long)smp_ipi_timer_interrupt;
-	eit_vector[188] = (unsigned long)smp_flush_cache_all_interrupt;
-	eit_vector[189] = 0;	/* CPU_BOOT_IPI */
-	eit_vector[190] = (unsigned long)smp_call_function_single_interrupt;
-	eit_vector[191] = 0;
-#endif
-	_flush_cache_copyback_all();
-}
-
-void __init trap_init(void)
-{
-	set_eit_vector_entries();
-
-	/*
-	 * Should be a barrier for any external CPU state.
-	 */
-	cpu_init();
-}
-
-static int kstack_depth_to_print = 24;
-
-static void show_trace(struct task_struct *task, unsigned long *stack)
-{
-	unsigned long addr;
-
-	if (!stack)
-		stack = (unsigned long*)&stack;
-
-	printk("Call Trace: ");
-	while (!kstack_end(stack)) {
-		addr = *stack++;
-		if (__kernel_text_address(addr))
-			printk("[<%08lx>] %pSR\n", addr, (void *)addr);
-	}
-	printk("\n");
-}
-
-void show_stack(struct task_struct *task, unsigned long *sp)
-{
-	unsigned long  *stack;
-	int  i;
-
-	/*
-	 * debugging aid: "show_stack(NULL);" prints the
-	 * back trace for this cpu.
-	 */
-
-	if(sp==NULL) {
-		if (task)
-			sp = (unsigned long *)task->thread.sp;
-		else
-			sp=(unsigned long*)&sp;
-	}
-
-	stack = sp;
-	for(i=0; i < kstack_depth_to_print; i++) {
-		if (kstack_end(stack))
-			break;
-		if (i && ((i % 4) == 0))
-			printk("\n       ");
-		printk("%08lx ", *stack++);
-	}
-	printk("\n");
-	show_trace(task, sp);
-}
-
-static void show_registers(struct pt_regs *regs)
-{
-	int i = 0;
-	int in_kernel = 1;
-	unsigned long sp;
-
-	printk("CPU:    %d\n", smp_processor_id());
-	show_regs(regs);
-
-	sp = (unsigned long) (1+regs);
-	if (user_mode(regs)) {
-		in_kernel = 0;
-		sp = regs->spu;
-		printk("SPU: %08lx\n", sp);
-	} else {
-		printk("SPI: %08lx\n", sp);
-	}
-	printk("Process %s (pid: %d, process nr: %d, stackpage=%08lx)",
-		current->comm, task_pid_nr(current), 0xffff & i, 4096+(unsigned long)current);
-
-	/*
-	 * When in-kernel, we also print out the stack and code at the
-	 * time of the fault..
-	 */
-	if (in_kernel) {
-		printk("\nStack: ");
-		show_stack(current, (unsigned long*) sp);
-
-		printk("\nCode: ");
-		if (regs->bpc < PAGE_OFFSET)
-			goto bad;
-
-		for(i=0;i<20;i++) {
-			unsigned char c;
-			if (__get_user(c, &((unsigned char*)regs->bpc)[i])) {
-bad:
-				printk(" Bad PC value.");
-				break;
-			}
-			printk("%02x ", c);
-		}
-	}
-	printk("\n");
-}
-
-static DEFINE_SPINLOCK(die_lock);
-
-void die(const char * str, struct pt_regs * regs, long err)
-{
-	console_verbose();
-	spin_lock_irq(&die_lock);
-	bust_spinlocks(1);
-	printk("%s: %04lx\n", str, err & 0xffff);
-	show_registers(regs);
-	bust_spinlocks(0);
-	spin_unlock_irq(&die_lock);
-	do_exit(SIGSEGV);
-}
-
-static __inline__ void die_if_kernel(const char * str,
-	struct pt_regs * regs, long err)
-{
-	if (!user_mode(regs))
-		die(str, regs, err);
-}
-
-static __inline__ void do_trap(int trapnr, int signr, const char * str,
-	struct pt_regs * regs, long error_code, siginfo_t *info)
-{
-	if (user_mode(regs)) {
-		/* trap_signal */
-		struct task_struct *tsk = current;
-		tsk->thread.error_code = error_code;
-		tsk->thread.trap_no = trapnr;
-		if (info)
-			force_sig_info(signr, info, tsk);
-		else
-			force_sig(signr, tsk);
-		return;
-	} else {
-		/* kernel_trap */
-		if (!fixup_exception(regs))
-			die(str, regs, error_code);
-		return;
-	}
-}
-
-#define DO_ERROR(trapnr, signr, str, name) \
-asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
-{ \
-	do_trap(trapnr, signr, NULL, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
-{ \
-	siginfo_t info; \
-	info.si_signo = signr; \
-	info.si_errno = 0; \
-	info.si_code = sicode; \
-	info.si_addr = (void __user *)siaddr; \
-	do_trap(trapnr, signr, str, regs, error_code, &info); \
-}
-
-DO_ERROR( 1, SIGTRAP, "debug trap", debug_trap)
-DO_ERROR_INFO(0x20, SIGILL,  "reserved instruction ", rie_handler, ILL_ILLOPC, regs->bpc)
-DO_ERROR_INFO(0x100, SIGILL,  "privileged instruction", pie_handler, ILL_PRVOPC, regs->bpc)
-DO_ERROR_INFO(-1, SIGILL,  "illegal trap", ill_trap, ILL_ILLTRP, regs->bpc)
-
-extern int handle_unaligned_access(unsigned long, struct pt_regs *);
-
-/* This code taken from arch/sh/kernel/traps.c */
-asmlinkage void do_alignment_check(struct pt_regs *regs, long error_code)
-{
-	mm_segment_t oldfs;
-	unsigned long insn;
-	int tmp;
-
-	oldfs = get_fs();
-
-	if (user_mode(regs)) {
-		local_irq_enable();
-		current->thread.error_code = error_code;
-		current->thread.trap_no = 0x17;
-
-		set_fs(USER_DS);
-		if (copy_from_user(&insn, (void *)regs->bpc, 4)) {
-			set_fs(oldfs);
-			goto uspace_segv;
-		}
-		tmp = handle_unaligned_access(insn, regs);
-		set_fs(oldfs);
-
-		if (!tmp)
-			return;
-
-	uspace_segv:
-		printk(KERN_NOTICE "Killing process \"%s\" due to unaligned "
-			"access\n", current->comm);
-		force_sig(SIGSEGV, current);
-	} else {
-		set_fs(KERNEL_DS);
-		if (copy_from_user(&insn, (void *)regs->bpc, 4)) {
-			set_fs(oldfs);
-			die("insn faulting in do_address_error", regs, 0);
-		}
-		handle_unaligned_access(insn, regs);
-		set_fs(oldfs);
-	}
-}