CRIS: Drop support for the CRIS port

The port was added back in 2000 so it's no longer even a good source
of inspiration for newer ports (if it ever was)

The last SoC (ARTPEC-3) with a CRIS main CPU was launched in 2008.

Coupled with time and working developer board hardware being
in low supply, it's time to drop the port from Linux.

So long and thanks for all the fish!

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 204 deletions

diff --git a/arch/cris/arch-v10/kernel/ptrace.c b/arch/cris/arch-v10/kernel/ptrace.c
deleted file mode 100644
index b89f57ae096e..000000000000
--- a/arch/cris/arch-v10/kernel/ptrace.c
+++ /dev/null
@@ -1,204 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2000-2003, Axis Communications AB.
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/signal.h>
-#include <linux/security.h>
-
-#include <linux/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-
-/* 
- * Determines which bits in DCCR the user has access to.
- * 1 = access, 0 = no access.
- */
-#define DCCR_MASK 0x0000001f     /* XNZVC */
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-inline long get_reg(struct task_struct *task, unsigned int regno)
-{
-	/* USP is a special case, it's not in the pt_regs struct but
-	 * in the tasks thread struct
-	 */
-
-	if (regno == PT_USP)
-		return task->thread.usp;
-	else if (regno < PT_MAX)
-		return ((unsigned long *)task_pt_regs(task))[regno];
-	else
-		return 0;
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-inline int put_reg(struct task_struct *task, unsigned int regno,
-			  unsigned long data)
-{
-	if (regno == PT_USP)
-		task->thread.usp = data;
-	else if (regno < PT_MAX)
-		((unsigned long *)task_pt_regs(task))[regno] = data;
-	else
-		return -1;
-	return 0;
-}
-
-/*
- * Called by kernel/ptrace.c when detaching.
- *
- * Make sure the single step bit is not set.
- */
-void 
-ptrace_disable(struct task_struct *child)
-{
-       /* Todo - pending singlesteps? */
-       clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-}
-
-/* 
- * Note that this implementation of ptrace behaves differently from vanilla
- * ptrace.  Contrary to what the man page says, in the PTRACE_PEEKTEXT,
- * PTRACE_PEEKDATA, and PTRACE_PEEKUSER requests the data variable is not
- * ignored.  Instead, the data variable is expected to point at a location
- * (in user space) where the result of the ptrace call is written (instead of
- * being returned).
- */
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	int ret;
-	unsigned int regno = addr >> 2;
-	unsigned long __user *datap = (unsigned long __user *)data;
-
-	switch (request) {
-		/* Read word at location address. */ 
-		case PTRACE_PEEKTEXT:
-		case PTRACE_PEEKDATA:
-			ret = generic_ptrace_peekdata(child, addr, data);
-			break;
-
-		/* Read the word at location address in the USER area. */
-		case PTRACE_PEEKUSR: {
-			unsigned long tmp;
-
-			ret = -EIO;
-			if ((addr & 3) || regno > PT_MAX)
-				break;
-
-			tmp = get_reg(child, regno);
-			ret = put_user(tmp, datap);
-			break;
-		}
-		
-		/* Write the word at location address. */
-		case PTRACE_POKETEXT:
-		case PTRACE_POKEDATA:
-			ret = generic_ptrace_pokedata(child, addr, data);
-			break;
- 
- 		/* Write the word at location address in the USER area. */
-		case PTRACE_POKEUSR:
-			ret = -EIO;
-			if ((addr & 3) || regno > PT_MAX)
-				break;
-
-			if (regno == PT_DCCR) {
-				/* don't allow the tracing process to change stuff like
-				 * interrupt enable, kernel/user bit, dma enables etc.
-				 */
-				data &= DCCR_MASK;
-				data |= get_reg(child, PT_DCCR) & ~DCCR_MASK;
-			}
-			if (put_reg(child, regno, data))
-				break;
-			ret = 0;
-			break;
-
-		/* Get all GP registers from the child. */
-		case PTRACE_GETREGS: {
-		  	int i;
-			unsigned long tmp;
-			
-			ret = 0;
-			for (i = 0; i <= PT_MAX; i++) {
-				tmp = get_reg(child, i);
-				
-				if (put_user(tmp, datap)) {
-					ret = -EFAULT;
-					break;
-				}
-				
-				datap++;
-			}
-
-			break;
-		}
-
-		/* Set all GP registers in the child. */
-		case PTRACE_SETREGS: {
-			int i;
-			unsigned long tmp;
-			
-			ret = 0;
-			for (i = 0; i <= PT_MAX; i++) {
-				if (get_user(tmp, datap)) {
-					ret = -EFAULT;
-					break;
-				}
-				
-				if (i == PT_DCCR) {
-					tmp &= DCCR_MASK;
-					tmp |= get_reg(child, PT_DCCR) & ~DCCR_MASK;
-				}
-				
-				put_reg(child, i, tmp);
-				datap++;
-			}
-			
-			break;
-		}
-
-		default:
-			ret = ptrace_request(child, request, addr, data);
-			break;
-	}
-
-	return ret;
-}
-
-void do_syscall_trace(void)
-{
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		return;
-	
-	if (!(current->ptrace & PT_PTRACED))
-		return;
-	
-	/* the 0x80 provides a way for the tracing parent to distinguish
-	   between a syscall stop and SIGTRAP delivery */
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				 ? 0x80 : 0));
-	
-	/*
-	 * This isn't the same as continuing with a signal, but it will do for
-	 * normal use.
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}