Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 1128 deletions

diff --git a/arch/cris/arch-v10/kernel/kgdb.c b/arch/cris/arch-v10/kernel/kgdb.c
deleted file mode 100644
index 79b13564d15c..000000000000
--- a/arch/cris/arch-v10/kernel/kgdb.c
+++ /dev/null
@@ -1,1128 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*!**************************************************************************
-*!
-*! FILE NAME  : kgdb.c
-*!
-*! DESCRIPTION: Implementation of the gdb stub with respect to ETRAX 100.
-*!              It is a mix of arch/m68k/kernel/kgdb.c and cris_stub.c.
-*!
-*!---------------------------------------------------------------------------
-*! HISTORY
-*!
-*! DATE         NAME            CHANGES
-*! ----         ----            -------
-*! Apr 26 1999  Hendrik Ruijter Initial version.
-*! May  6 1999  Hendrik Ruijter Removed call to strlen in libc and removed
-*!                              struct assignment as it generates calls to
-*!                              memcpy in libc.
-*! Jun 17 1999  Hendrik Ruijter Added gdb 4.18 support. 'X', 'qC' and 'qL'.
-*! Jul 21 1999  Bjorn Wesen     eLinux port
-*!
-*!---------------------------------------------------------------------------
-*!
-*! (C) Copyright 1999, Axis Communications AB, LUND, SWEDEN
-*!
-*!**************************************************************************/
-/* @(#) cris_stub.c 1.3 06/17/99 */
-
-/*
- *  kgdb usage notes:
- *  -----------------
- *
- * If you select CONFIG_ETRAX_KGDB in the configuration, the kernel will be 
- * built with different gcc flags: "-g" is added to get debug infos, and
- * "-fomit-frame-pointer" is omitted to make debugging easier. Since the
- * resulting kernel will be quite big (approx. > 7 MB), it will be stripped
- * before compresion. Such a kernel will behave just as usually, except if
- * given a "debug=<device>" command line option. (Only serial devices are
- * allowed for <device>, i.e. no printers or the like; possible values are
- * machine depedend and are the same as for the usual debug device, the one
- * for logging kernel messages.) If that option is given and the device can be
- * initialized, the kernel will connect to the remote gdb in trap_init(). The
- * serial parameters are fixed to 8N1 and 115200 bps, for easyness of
- * implementation.
- *
- * To start a debugging session, start that gdb with the debugging kernel
- * image (the one with the symbols, vmlinux.debug) named on the command line.
- * This file will be used by gdb to get symbol and debugging infos about the
- * kernel. Next, select remote debug mode by
- *    target remote <device>
- * where <device> is the name of the serial device over which the debugged
- * machine is connected. Maybe you have to adjust the baud rate by
- *    set remotebaud <rate>
- * or also other parameters with stty:
- *    shell stty ... </dev/...
- * If the kernel to debug has already booted, it waited for gdb and now
- * connects, and you'll see a breakpoint being reported. If the kernel isn't
- * running yet, start it now. The order of gdb and the kernel doesn't matter.
- * Another thing worth knowing about in the getting-started phase is how to
- * debug the remote protocol itself. This is activated with
- *    set remotedebug 1
- * gdb will then print out each packet sent or received. You'll also get some
- * messages about the gdb stub on the console of the debugged machine.
- *
- * If all that works, you can use lots of the usual debugging techniques on
- * the kernel, e.g. inspecting and changing variables/memory, setting
- * breakpoints, single stepping and so on. It's also possible to interrupt the
- * debugged kernel by pressing C-c in gdb. Have fun! :-)
- *
- * The gdb stub is entered (and thus the remote gdb gets control) in the
- * following situations:
- *
- *  - If breakpoint() is called. This is just after kgdb initialization, or if
- *    a breakpoint() call has been put somewhere into the kernel source.
- *    (Breakpoints can of course also be set the usual way in gdb.)
- *    In eLinux, we call breakpoint() in init/main.c after IRQ initialization.
- *
- *  - If there is a kernel exception, i.e. bad_super_trap() or die_if_kernel()
- *    are entered. All the CPU exceptions are mapped to (more or less..., see
- *    the hard_trap_info array below) appropriate signal, which are reported
- *    to gdb. die_if_kernel() is usually called after some kind of access
- *    error and thus is reported as SIGSEGV.
- *
- *  - When panic() is called. This is reported as SIGABRT.
- *
- *  - If C-c is received over the serial line, which is treated as
- *    SIGINT.
- *
- * Of course, all these signals are just faked for gdb, since there is no
- * signal concept as such for the kernel. It also isn't possible --obviously--
- * to set signal handlers from inside gdb, or restart the kernel with a
- * signal.
- *
- * Current limitations:
- *
- *  - While the kernel is stopped, interrupts are disabled for safety reasons
- *    (i.e., variables not changing magically or the like). But this also
- *    means that the clock isn't running anymore, and that interrupts from the
- *    hardware may get lost/not be served in time. This can cause some device
- *    errors...
- *
- *  - When single-stepping, only one instruction of the current thread is
- *    executed, but interrupts are allowed for that time and will be serviced
- *    if pending. Be prepared for that.
- *
- *  - All debugging happens in kernel virtual address space. There's no way to
- *    access physical memory not mapped in kernel space, or to access user
- *    space. A way to work around this is using get_user_long & Co. in gdb
- *    expressions, but only for the current process.
- *
- *  - Interrupting the kernel only works if interrupts are currently allowed,
- *    and the interrupt of the serial line isn't blocked by some other means
- *    (IPL too high, disabled, ...)
- *
- *  - The gdb stub is currently not reentrant, i.e. errors that happen therein
- *    (e.g. accessing invalid memory) may not be caught correctly. This could
- *    be removed in future by introducing a stack of struct registers.
- *
- */
-
-/*
- *  To enable debugger support, two things need to happen.  One, a
- *  call to kgdb_init() is necessary in order to allow any breakpoints
- *  or error conditions to be properly intercepted and reported to gdb.
- *  Two, a breakpoint needs to be generated to begin communication.  This
- *  is most easily accomplished by a call to breakpoint(). 
- *
- *    The following gdb commands are supported:
- *
- * command          function                               Return value
- *
- *    g             return the value of the CPU registers  hex data or ENN
- *    G             set the value of the CPU registers     OK or ENN
- *
- *    mAA..AA,LLLL  Read LLLL bytes at address AA..AA      hex data or ENN
- *    MAA..AA,LLLL: Write LLLL bytes at address AA.AA      OK or ENN
- *
- *    c             Resume at current address              SNN   ( signal NN)
- *    cAA..AA       Continue at address AA..AA             SNN
- *
- *    s             Step one instruction                   SNN
- *    sAA..AA       Step one instruction from AA..AA       SNN
- *
- *    k             kill
- *
- *    ?             What was the last sigval ?             SNN   (signal NN)
- *
- *    bBB..BB	    Set baud rate to BB..BB		   OK or BNN, then sets
- *							   baud rate
- *
- * All commands and responses are sent with a packet which includes a
- * checksum.  A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum>    :: < two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer.  '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host:                  Reply:
- * $m0,10#2a               +$00010203040506070809101112131415#42
- *
- */
-
-
-#include <linux/string.h>
-#include <linux/signal.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/linkage.h>
-#include <linux/reboot.h>
-
-#include <asm/setup.h>
-#include <asm/ptrace.h>
-
-#include <arch/svinto.h>
-#include <asm/irq.h>
-
-static int kgdb_started = 0;
-
-/********************************* Register image ****************************/
-/* Use the order of registers as defined in "AXIS ETRAX CRIS Programmer's
-   Reference", p. 1-1, with the additional register definitions of the
-   ETRAX 100LX in cris-opc.h.
-   There are 16 general 32-bit registers, R0-R15, where R14 is the stack
-   pointer, SP, and R15 is the program counter, PC.
-   There are 16 special registers, P0-P15, where three of the unimplemented
-   registers, P0, P4 and P8, are reserved as zero-registers. A read from
-   any of these registers returns zero and a write has no effect. */
-
-typedef
-struct register_image
-{
-	/* Offset */
-	unsigned int     r0;   /* 0x00 */
-	unsigned int     r1;   /* 0x04 */
-	unsigned int     r2;   /* 0x08 */
-	unsigned int     r3;   /* 0x0C */
-	unsigned int     r4;   /* 0x10 */
-	unsigned int     r5;   /* 0x14 */
-	unsigned int     r6;   /* 0x18 */
-	unsigned int     r7;   /* 0x1C */
-	unsigned int     r8;   /* 0x20 Frame pointer */
-	unsigned int     r9;   /* 0x24 */
-	unsigned int    r10;   /* 0x28 */
-	unsigned int    r11;   /* 0x2C */
-	unsigned int    r12;   /* 0x30 */
-	unsigned int    r13;   /* 0x34 */
-	unsigned int     sp;   /* 0x38 Stack pointer */
-	unsigned int     pc;   /* 0x3C Program counter */
-
-        unsigned char    p0;   /* 0x40 8-bit zero-register */
-	unsigned char    vr;   /* 0x41 Version register */
-
-        unsigned short   p4;   /* 0x42 16-bit zero-register */
-	unsigned short  ccr;   /* 0x44 Condition code register */
-	
-	unsigned int    mof;   /* 0x46 Multiply overflow register */
-	
-        unsigned int     p8;   /* 0x4A 32-bit zero-register */
-	unsigned int    ibr;   /* 0x4E Interrupt base register */
-	unsigned int    irp;   /* 0x52 Interrupt return pointer */
-	unsigned int    srp;   /* 0x56 Subroutine return pointer */
-	unsigned int    bar;   /* 0x5A Breakpoint address register */
-	unsigned int   dccr;   /* 0x5E Double condition code register */
-	unsigned int    brp;   /* 0x62 Breakpoint return pointer (pc in caller) */
-	unsigned int    usp;   /* 0x66 User mode stack pointer */
-} registers;
-
-/* Serial port, reads one character. ETRAX 100 specific. from debugport.c */
-int getDebugChar (void);
-
-/* Serial port, writes one character. ETRAX 100 specific. from debugport.c */
-void putDebugChar (int val);
-
-void enableDebugIRQ (void);
-
-/******************** Prototypes for global functions. ***********************/
-
-/* The string str is prepended with the GDB printout token and sent. */
-void putDebugString (const unsigned char *str, int length); /* used by etrax100ser.c */
-
-/* The hook for both static (compiled) and dynamic breakpoints set by GDB.
-   ETRAX 100 specific. */
-void handle_breakpoint (void);                          /* used by irq.c */
-
-/* The hook for an interrupt generated by GDB. ETRAX 100 specific. */
-void handle_interrupt (void);                           /* used by irq.c */
-
-/* A static breakpoint to be used at startup. */
-void breakpoint (void);                                 /* called by init/main.c */
-
-/* From osys_int.c, executing_task contains the number of the current
-   executing task in osys. Does not know of object-oriented threads. */
-extern unsigned char executing_task;
-
-/* The number of characters used for a 64 bit thread identifier. */
-#define HEXCHARS_IN_THREAD_ID 16
-
-/********************************** Packet I/O ******************************/
-/* BUFMAX defines the maximum number of characters in
-   inbound/outbound buffers */
-#define BUFMAX 512
-
-/* Run-length encoding maximum length. Send 64 at most. */
-#define RUNLENMAX 64
-
-/* The inbound/outbound buffers used in packet I/O */
-static char remcomInBuffer[BUFMAX];
-static char remcomOutBuffer[BUFMAX];
-
-/* Error and warning messages. */
-enum error_type
-{
-	SUCCESS, E01, E02, E03, E04, E05, E06, E07, E08
-};
-static char *error_message[] =
-{
-	"",
-	"E01 Set current or general thread - H[c,g] - internal error.",
-	"E02 Change register content - P - cannot change read-only register.",
-	"E03 Thread is not alive.", /* T, not used. */
-	"E04 The command is not supported - [s,C,S,!,R,d,r] - internal error.",
-	"E05 Change register content - P - the register is not implemented..",
-	"E06 Change memory content - M - internal error.",
-	"E07 Change register content - P - the register is not stored on the stack",
-	"E08 Invalid parameter"
-};
-/********************************* Register image ****************************/
-/* Use the order of registers as defined in "AXIS ETRAX CRIS Programmer's
-   Reference", p. 1-1, with the additional register definitions of the
-   ETRAX 100LX in cris-opc.h.
-   There are 16 general 32-bit registers, R0-R15, where R14 is the stack
-   pointer, SP, and R15 is the program counter, PC.
-   There are 16 special registers, P0-P15, where three of the unimplemented
-   registers, P0, P4 and P8, are reserved as zero-registers. A read from
-   any of these registers returns zero and a write has no effect. */
-enum register_name
-{
-	R0,  R1,   R2,  R3,
-	R4,  R5,   R6,  R7,
-	R8,  R9,   R10, R11,
-	R12, R13,  SP,  PC,
-	P0,  VR,   P2,  P3,
-	P4,  CCR,  P6,  MOF,
-	P8,  IBR,  IRP, SRP,
-	BAR, DCCR, BRP, USP
-};
-
-/* The register sizes of the registers in register_name. An unimplemented register
-   is designated by size 0 in this array. */
-static int register_size[] =
-{
-	4, 4, 4, 4,
-	4, 4, 4, 4,
-	4, 4, 4, 4,
-	4, 4, 4, 4,
-	1, 1, 0, 0,
-	2, 2, 0, 4,
-	4, 4, 4, 4,
-	4, 4, 4, 4
-};
-
-/* Contains the register image of the executing thread in the assembler
-   part of the code in order to avoid horrible addressing modes. */
-registers cris_reg;
-
-/* FIXME: Should this be used? Delete otherwise. */
-/* Contains the assumed consistency state of the register image. Uses the
-   enum error_type for state information. */
-static int consistency_status = SUCCESS;
-
-/********************************** Handle exceptions ************************/
-/* The variable cris_reg contains the register image associated with the
-   current_thread_c variable. It is a complete register image created at
-   entry. The reg_g contains a register image of a task where the general
-   registers are taken from the stack and all special registers are taken
-   from the executing task. It is associated with current_thread_g and used
-   in order to provide access mainly for 'g', 'G' and 'P'.
-*/
-
-/********************************** Breakpoint *******************************/
-/* Use an internal stack in the breakpoint and interrupt response routines */
-#define INTERNAL_STACK_SIZE 1024
-char internal_stack[INTERNAL_STACK_SIZE];
-
-/* Due to the breakpoint return pointer, a state variable is needed to keep
-   track of whether it is a static (compiled) or dynamic (gdb-invoked)
-   breakpoint to be handled. A static breakpoint uses the content of register
-   BRP as it is whereas a dynamic breakpoint requires subtraction with 2
-   in order to execute the instruction. The first breakpoint is static. */
-static unsigned char __used is_dyn_brkp;
-
-/********************************* String library ****************************/
-/* Single-step over library functions creates trap loops. */
-
-/* Copy char s2[] to s1[]. */
-static char*
-gdb_cris_strcpy (char *s1, const char *s2)
-{
-	char *s = s1;
-	
-	for (s = s1; (*s++ = *s2++) != '\0'; )
-		;
-	return (s1);
-}
-
-/* Find length of s[]. */
-static int
-gdb_cris_strlen (const char *s)
-{
-	const char *sc;
-	
-	for (sc = s; *sc != '\0'; sc++)
-		;
-	return (sc - s);
-}
-
-/* Find first occurrence of c in s[n]. */
-static void*
-gdb_cris_memchr (const void *s, int c, int n)
-{
-	const unsigned char uc = c;
-	const unsigned char *su;
-	
-	for (su = s; 0 < n; ++su, --n)
-		if (*su == uc)
-			return ((void *)su);
-	return (NULL);
-}
-/******************************* Standard library ****************************/
-/* Single-step over library functions creates trap loops. */
-/* Convert string to long. */
-static int
-gdb_cris_strtol (const char *s, char **endptr, int base)
-{
-	char *s1;
-	char *sd;
-	int x = 0;
-	
-	for (s1 = (char*)s; (sd = gdb_cris_memchr(hex_asc, *s1, base)) != NULL; ++s1)
-		x = x * base + (sd - hex_asc);
-        
-        if (endptr)
-        {
-                /* Unconverted suffix is stored in endptr unless endptr is NULL. */
-                *endptr = s1;
-        }
-        
-	return x;
-}
-
-/********************************** Packet I/O ******************************/
-
-/* Convert the memory, pointed to by mem into hexadecimal representation.
-   Put the result in buf, and return a pointer to the last character
-   in buf (null). */
-
-static char *
-mem2hex(char *buf, unsigned char *mem, int count)
-{
-	int i;
-	int ch;
-        
-        if (mem == NULL) {
-                /* Bogus read from m0. FIXME: What constitutes a valid address? */
-                for (i = 0; i < count; i++) {
-                        *buf++ = '0';
-                        *buf++ = '0';
-                }
-        } else {
-                /* Valid mem address. */
-                for (i = 0; i < count; i++) {
-                        ch = *mem++;
-			buf = hex_byte_pack(buf, ch);
-                }
-        }
-        
-        /* Terminate properly. */
-	*buf = '\0';
-	return (buf);
-}
-
-/* Put the content of the array, in binary representation, pointed to by buf
-   into memory pointed to by mem, and return a pointer to the character after
-   the last byte written.
-   Gdb will escape $, #, and the escape char (0x7d). */
-static unsigned char*
-bin2mem (unsigned char *mem, unsigned char *buf, int count)
-{
-	int i;
-	unsigned char *next;
-	for (i = 0; i < count; i++) {
-		/* Check for any escaped characters. Be paranoid and
-		   only unescape chars that should be escaped. */
-		if (*buf == 0x7d) {
-			next = buf + 1;
-			if (*next == 0x3 || *next == 0x4 || *next == 0x5D) /* #, $, ESC */
-				{
-					buf++;
-					*buf += 0x20;
-				}
-		}
-		*mem++ = *buf++;
-	}
-	return (mem);
-}
-
-/* Await the sequence $<data>#<checksum> and store <data> in the array buffer
-   returned. */
-static void
-getpacket (char *buffer)
-{
-	unsigned char checksum;
-	unsigned char xmitcsum;
-	int i;
-	int count;
-	char ch;
-	do {
-		while ((ch = getDebugChar ()) != '$')
-			/* Wait for the start character $ and ignore all other characters */;
-		checksum = 0;
-		xmitcsum = -1;
-		count = 0;
-		/* Read until a # or the end of the buffer is reached */
-		while (count < BUFMAX - 1) {
-			ch = getDebugChar ();
-			if (ch == '#')
-				break;
-			checksum = checksum + ch;
-			buffer[count] = ch;
-			count = count + 1;
-		}
-		buffer[count] = '\0';
-		
-		if (ch == '#') {
-			xmitcsum = hex_to_bin(getDebugChar()) << 4;
-			xmitcsum += hex_to_bin(getDebugChar());
-			if (checksum != xmitcsum) {
-				/* Wrong checksum */
-				putDebugChar ('-');
-			}
-			else {
-				/* Correct checksum */
-				putDebugChar ('+');
-				/* If sequence characters are received, reply with them */
-				if (buffer[2] == ':') {
-					putDebugChar (buffer[0]);
-					putDebugChar (buffer[1]);
-					/* Remove the sequence characters from the buffer */
-					count = gdb_cris_strlen (buffer);
-					for (i = 3; i <= count; i++)
-						buffer[i - 3] = buffer[i];
-				}
-			}
-		}
-	} while (checksum != xmitcsum);
-}
-
-/* Send $<data>#<checksum> from the <data> in the array buffer. */
-
-static void
-putpacket(char *buffer)
-{
-	int checksum;
-	int runlen;
-	int encode;
-	
-	do {
-		char *src = buffer;
-		putDebugChar ('$');
-		checksum = 0;
-		while (*src) {
-			/* Do run length encoding */
-			putDebugChar (*src);
-			checksum += *src;
-			runlen = 0;
-			while (runlen < RUNLENMAX && *src == src[runlen]) {
-				runlen++;
-			}
-			if (runlen > 3) {
-				/* Got a useful amount */
-				putDebugChar ('*');
-				checksum += '*';
-				encode = runlen + ' ' - 4;
-				putDebugChar (encode);
-				checksum += encode;
-				src += runlen;
-			}
-			else {
-				src++;
-			}
-		}
-		putDebugChar('#');
-		putDebugChar(hex_asc_hi(checksum));
-		putDebugChar(hex_asc_lo(checksum));
-	} while(kgdb_started && (getDebugChar() != '+'));
-}
-
-/* The string str is prepended with the GDB printout token and sent. Required
-   in traditional implementations. */
-void
-putDebugString (const unsigned char *str, int length)
-{
-        remcomOutBuffer[0] = 'O';
-        mem2hex(&remcomOutBuffer[1], (unsigned char *)str, length);
-        putpacket(remcomOutBuffer);
-}
-
-/********************************* Register image ****************************/
-/* Write a value to a specified register in the register image of the current
-   thread. Returns status code SUCCESS, E02, E05 or E08. */
-static int
-write_register (int regno, char *val)
-{
-	int status = SUCCESS;
-	registers *current_reg = &cris_reg;
-
-        if (regno >= R0 && regno <= PC) {
-		/* 32-bit register with simple offset. */
-		if (hex2bin((unsigned char *)current_reg + regno * sizeof(unsigned int),
-			    val, sizeof(unsigned int)))
-			status = E08;
-	}
-        else if (regno == P0 || regno == VR || regno == P4 || regno == P8) {
-		/* Do not support read-only registers. */
-		status = E02;
-	}
-        else if (regno == CCR) {
-		/* 16 bit register with complex offset. (P4 is read-only, P6 is not implemented, 
-                   and P7 (MOF) is 32 bits in ETRAX 100LX. */
-		if (hex2bin((unsigned char *)&(current_reg->ccr) + (regno-CCR) * sizeof(unsigned short),
-			    val, sizeof(unsigned short)))
-			status = E08;
-	}
-	else if (regno >= MOF && regno <= USP) {
-		/* 32 bit register with complex offset.  (P8 has been taken care of.) */
-		if (hex2bin((unsigned char *)&(current_reg->ibr) + (regno-IBR) * sizeof(unsigned int),
-			    val, sizeof(unsigned int)))
-			status = E08;
-	} 
-        else {
-		/* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
-		status = E05;
-	}
-	return status;
-}
-
-/* Read a value from a specified register in the register image. Returns the
-   value in the register or -1 for non-implemented registers.
-   Should check consistency_status after a call which may be E05 after changes
-   in the implementation. */
-static int
-read_register (char regno, unsigned int *valptr)
-{
-	registers *current_reg = &cris_reg;
-
-	if (regno >= R0 && regno <= PC) {
-		/* 32-bit register with simple offset. */
-		*valptr = *(unsigned int *)((char *)current_reg + regno * sizeof(unsigned int));
-                return SUCCESS;
-	}
-	else if (regno == P0 || regno == VR) {
-		/* 8 bit register with complex offset. */
-		*valptr = (unsigned int)(*(unsigned char *)
-                                         ((char *)&(current_reg->p0) + (regno-P0) * sizeof(char)));
-                return SUCCESS;
-	}
-	else if (regno == P4 || regno == CCR) {
-		/* 16 bit register with complex offset. */
-		*valptr = (unsigned int)(*(unsigned short *)
-                                         ((char *)&(current_reg->p4) + (regno-P4) * sizeof(unsigned short)));
-                return SUCCESS;
-	}
-	else if (regno >= MOF && regno <= USP) {
-		/* 32 bit register with complex offset. */
-		*valptr = *(unsigned int *)((char *)&(current_reg->p8)
-                                            + (regno-P8) * sizeof(unsigned int));
-                return SUCCESS;
-	}
-	else {
-		/* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
-		consistency_status = E05;
-		return E05;
-	}
-}
-
-/********************************** Handle exceptions ************************/
-/* Build and send a response packet in order to inform the host the
-   stub is stopped. TAAn...:r...;n...:r...;n...:r...;
-                    AA = signal number
-                    n... = register number (hex)
-                    r... = register contents
-                    n... = `thread'
-                    r... = thread process ID.  This is a hex integer.
-                    n... = other string not starting with valid hex digit.
-                    gdb should ignore this n,r pair and go on to the next.
-                    This way we can extend the protocol. */
-static void
-stub_is_stopped(int sigval)
-{
-	char *ptr = remcomOutBuffer;
-	int regno;
-
-	unsigned int reg_cont;
-	int status;
-        
-	/* Send trap type (converted to signal) */
-
-	*ptr++ = 'T';
-	ptr = hex_byte_pack(ptr, sigval);
-
-	/* Send register contents. We probably only need to send the
-	 * PC, frame pointer and stack pointer here. Other registers will be
-	 * explicitly asked for. But for now, send all.
-	 */
-	
-	for (regno = R0; regno <= USP; regno++) {
-		/* Store n...:r...; for the registers in the buffer. */
-
-                status = read_register (regno, &reg_cont);
-                
-		if (status == SUCCESS) {
-			ptr = hex_byte_pack(ptr, regno);
-                        *ptr++ = ':';
-
-                        ptr = mem2hex(ptr, (unsigned char *)&reg_cont,
-                                      register_size[regno]);
-                        *ptr++ = ';';
-                }
-                
-	}
-
-	/* null-terminate and send it off */
-
-	*ptr = 0;
-
-	putpacket (remcomOutBuffer);
-}
-
-/* Performs a complete re-start from scratch. */
-static void
-kill_restart (void)
-{
-	machine_restart("");
-}
-
-/* All expected commands are sent from remote.c. Send a response according
-   to the description in remote.c. */
-void
-handle_exception (int sigval)
-{
-	/* Send response. */
-
-	stub_is_stopped (sigval);
-
-	for (;;) {
-		remcomOutBuffer[0] = '\0';
-		getpacket (remcomInBuffer);
-		switch (remcomInBuffer[0]) {
-			case 'g':
-				/* Read registers: g
-				   Success: Each byte of register data is described by two hex digits.
-				   Registers are in the internal order for GDB, and the bytes
-				   in a register  are in the same order the machine uses.
-				   Failure: void. */
-				
-				mem2hex(remcomOutBuffer, (char *)&cris_reg, sizeof(registers));
-				break;
-				
-			case 'G':
-				/* Write registers. GXX..XX
-				   Each byte of register data  is described by two hex digits.
-				   Success: OK
-				   Failure: E08. */
-				if (hex2bin((char *)&cris_reg, &remcomInBuffer[1], sizeof(registers)))
-					gdb_cris_strcpy (remcomOutBuffer, error_message[E08]);
-				else
-					gdb_cris_strcpy (remcomOutBuffer, "OK");
-				break;
-				
-			case 'P':
-				/* Write register. Pn...=r...
-				   Write register n..., hex value without 0x, with value r...,
-				   which contains a hex value without 0x and two hex digits
-				   for each byte in the register (target byte order). P1f=11223344 means
-				   set register 31 to 44332211.
-				   Success: OK
-				   Failure: E02, E05, E08 */
-				{
-					char *suffix;
-					int regno = gdb_cris_strtol (&remcomInBuffer[1], &suffix, 16);
-					int status;
-					status = write_register (regno, suffix+1);
-
-					switch (status) {
-						case E02:
-							/* Do not support read-only registers. */
-							gdb_cris_strcpy (remcomOutBuffer, error_message[E02]);
-							break;
-						case E05:
-							/* Do not support non-existing registers. */
-							gdb_cris_strcpy (remcomOutBuffer, error_message[E05]);
-							break;
-						case E07:
-							/* Do not support non-existing registers on the stack. */
-							gdb_cris_strcpy (remcomOutBuffer, error_message[E07]);
-							break;
-						case E08:
-							/* Invalid parameter. */
-							gdb_cris_strcpy (remcomOutBuffer, error_message[E08]);
-							break;
-						default:
-							/* Valid register number. */
-							gdb_cris_strcpy (remcomOutBuffer, "OK");
-							break;
-					}
-				}
-				break;
-				
-			case 'm':
-				/* Read from memory. mAA..AA,LLLL
-				   AA..AA is the address and LLLL is the length.
-				   Success: XX..XX is the memory content.  Can be fewer bytes than
-				   requested if only part of the data may be read. m6000120a,6c means
-				   retrieve 108 byte from base address 6000120a.
-				   Failure: void. */
-				{
-                                        char *suffix;
-					unsigned char *addr = (unsigned char *)gdb_cris_strtol(&remcomInBuffer[1],
-                                                                                               &suffix, 16);                                        int length = gdb_cris_strtol(suffix+1, 0, 16);
-                                        
-                                        mem2hex(remcomOutBuffer, addr, length);
-                                }
-				break;
-				
-			case 'X':
-				/* Write to memory. XAA..AA,LLLL:XX..XX
-				   AA..AA is the start address,  LLLL is the number of bytes, and
-				   XX..XX is the binary data.
-				   Success: OK
-				   Failure: void. */
-			case 'M':
-				/* Write to memory. MAA..AA,LLLL:XX..XX
-				   AA..AA is the start address,  LLLL is the number of bytes, and
-				   XX..XX is the hexadecimal data.
-				   Success: OK
-				   Failure: E08. */
-				{
-					char *lenptr;
-					char *dataptr;
-					unsigned char *addr = (unsigned char *)gdb_cris_strtol(&remcomInBuffer[1],
-										      &lenptr, 16);
-					int length = gdb_cris_strtol(lenptr+1, &dataptr, 16);
-					if (*lenptr == ',' && *dataptr == ':') {
-						if (remcomInBuffer[0] == 'M') {
-							if (hex2bin(addr, dataptr + 1, length))
-								gdb_cris_strcpy (remcomOutBuffer, error_message[E08]);
-							else
-								gdb_cris_strcpy (remcomOutBuffer, "OK");
-						} else /* X */ {
-							bin2mem(addr, dataptr + 1, length);
-							gdb_cris_strcpy (remcomOutBuffer, "OK");
-						}
-					} else {
-						gdb_cris_strcpy (remcomOutBuffer, error_message[E06]);
-					}
-				}
-				break;
-				
-			case 'c':
-				/* Continue execution. cAA..AA
-				   AA..AA is the address where execution is resumed. If AA..AA is
-				   omitted, resume at the present address.
-				   Success: return to the executing thread.
-				   Failure: will never know. */
-				if (remcomInBuffer[1] != '\0') {
-					cris_reg.pc = gdb_cris_strtol (&remcomInBuffer[1], 0, 16);
-				}
-				enableDebugIRQ();
-				return;
-				
-			case 's':
-				/* Step. sAA..AA
-				   AA..AA is the address where execution is resumed. If AA..AA is
-				   omitted, resume at the present address. Success: return to the
-				   executing thread. Failure: will never know.
-				   
-				   Should never be invoked. The single-step is implemented on
-				   the host side. If ever invoked, it is an internal error E04. */
-				gdb_cris_strcpy (remcomOutBuffer, error_message[E04]);
-				putpacket (remcomOutBuffer);
-				return;
-				
-			case '?':
-				/* The last signal which caused a stop. ?
-				   Success: SAA, where AA is the signal number.
-				   Failure: void. */
-				remcomOutBuffer[0] = 'S';
-				remcomOutBuffer[1] = hex_asc_hi(sigval);
-				remcomOutBuffer[2] = hex_asc_lo(sigval);
-				remcomOutBuffer[3] = 0;
-				break;
-				
-			case 'D':
-				/* Detach from host. D
-				   Success: OK, and return to the executing thread.
-				   Failure: will never know */
-				putpacket ("OK");
-				return;
-				
-			case 'k':
-			case 'r':
-				/* kill request or reset request.
-				   Success: restart of target.
-				   Failure: will never know. */
-				kill_restart ();
-				break;
-				
-			case 'C':
-			case 'S':
-			case '!':
-			case 'R':
-			case 'd':
-				/* Continue with signal sig. Csig;AA..AA
-				   Step with signal sig. Ssig;AA..AA
-				   Use the extended remote protocol. !
-				   Restart the target system. R0
-				   Toggle debug flag. d
-				   Search backwards. tAA:PP,MM
-				   Not supported: E04 */
-				gdb_cris_strcpy (remcomOutBuffer, error_message[E04]);
-				break;
-				
-			default:
-				/* The stub should ignore other request and send an empty
-				   response ($#<checksum>). This way we can extend the protocol and GDB
-				   can tell whether the stub it is talking to uses the old or the new. */
-				remcomOutBuffer[0] = 0;
-				break;
-		}
-		putpacket(remcomOutBuffer);
-	}
-}
-
-/********************************** Breakpoint *******************************/
-/* The hook for both a static (compiled) and a dynamic breakpoint set by GDB.
-   An internal stack is used by the stub. The register image of the caller is
-   stored in the structure register_image.
-   Interactive communication with the host is handled by handle_exception and
-   finally the register image is restored. */
-
-void kgdb_handle_breakpoint(void);
-
-asm ("\n"
-"  .global kgdb_handle_breakpoint\n"
-"kgdb_handle_breakpoint:\n"
-";;\n"
-";; Response to the break-instruction\n"
-";;\n"
-";; Create a register image of the caller\n"
-";;\n"
-"  move     $dccr,[cris_reg+0x5E] ; Save the flags in DCCR before disable interrupts\n"
-"  di                        ; Disable interrupts\n"
-"  move.d   $r0,[cris_reg]        ; Save R0\n"
-"  move.d   $r1,[cris_reg+0x04]   ; Save R1\n"
-"  move.d   $r2,[cris_reg+0x08]   ; Save R2\n"
-"  move.d   $r3,[cris_reg+0x0C]   ; Save R3\n"
-"  move.d   $r4,[cris_reg+0x10]   ; Save R4\n"
-"  move.d   $r5,[cris_reg+0x14]   ; Save R5\n"
-"  move.d   $r6,[cris_reg+0x18]   ; Save R6\n"
-"  move.d   $r7,[cris_reg+0x1C]   ; Save R7\n"
-"  move.d   $r8,[cris_reg+0x20]   ; Save R8\n"
-"  move.d   $r9,[cris_reg+0x24]   ; Save R9\n"
-"  move.d   $r10,[cris_reg+0x28]  ; Save R10\n"
-"  move.d   $r11,[cris_reg+0x2C]  ; Save R11\n"
-"  move.d   $r12,[cris_reg+0x30]  ; Save R12\n"
-"  move.d   $r13,[cris_reg+0x34]  ; Save R13\n"
-"  move.d   $sp,[cris_reg+0x38]   ; Save SP (R14)\n"
-";; Due to the old assembler-versions BRP might not be recognized\n"
-"  .word 0xE670              ; move brp,$r0\n"
-"  subq     2,$r0             ; Set to address of previous instruction.\n"
-"  move.d   $r0,[cris_reg+0x3c]   ; Save the address in PC (R15)\n"
-"  clear.b  [cris_reg+0x40]      ; Clear P0\n"
-"  move     $vr,[cris_reg+0x41]   ; Save special register P1\n"
-"  clear.w  [cris_reg+0x42]      ; Clear P4\n"
-"  move     $ccr,[cris_reg+0x44]  ; Save special register CCR\n"
-"  move     $mof,[cris_reg+0x46]  ; P7\n"
-"  clear.d  [cris_reg+0x4A]      ; Clear P8\n"
-"  move     $ibr,[cris_reg+0x4E]  ; P9,\n"
-"  move     $irp,[cris_reg+0x52]  ; P10,\n"
-"  move     $srp,[cris_reg+0x56]  ; P11,\n"
-"  move     $bar,[cris_reg+0x5A]  ; P12,\n"
-"                            ; P13, register DCCR already saved\n"
-";; Due to the old assembler-versions BRP might not be recognized\n"
-"  .word 0xE670              ; move brp,r0\n"
-";; Static (compiled) breakpoints must return to the next instruction in order\n"
-";; to avoid infinite loops. Dynamic (gdb-invoked) must restore the instruction\n"
-";; in order to execute it when execution is continued.\n"
-"  test.b   [is_dyn_brkp]    ; Is this a dynamic breakpoint?\n"
-"  beq      is_static         ; No, a static breakpoint\n"
-"  nop\n"
-"  subq     2,$r0              ; rerun the instruction the break replaced\n"
-"is_static:\n"
-"  moveq    1,$r1\n"
-"  move.b   $r1,[is_dyn_brkp] ; Set the state variable to dynamic breakpoint\n"
-"  move.d   $r0,[cris_reg+0x62]    ; Save the return address in BRP\n"
-"  move     $usp,[cris_reg+0x66]   ; USP\n"
-";;\n"
-";; Handle the communication\n"
-";;\n"
-"  move.d   internal_stack+1020,$sp ; Use the internal stack which grows upward\n"
-"  moveq    5,$r10                   ; SIGTRAP\n"
-"  jsr      handle_exception       ; Interactive routine\n"
-";;\n"
-";; Return to the caller\n"
-";;\n"
-"   move.d  [cris_reg],$r0         ; Restore R0\n"
-"   move.d  [cris_reg+0x04],$r1    ; Restore R1\n"
-"   move.d  [cris_reg+0x08],$r2    ; Restore R2\n"
-"   move.d  [cris_reg+0x0C],$r3    ; Restore R3\n"
-"   move.d  [cris_reg+0x10],$r4    ; Restore R4\n"
-"   move.d  [cris_reg+0x14],$r5    ; Restore R5\n"
-"   move.d  [cris_reg+0x18],$r6    ; Restore R6\n"
-"   move.d  [cris_reg+0x1C],$r7    ; Restore R7\n"
-"   move.d  [cris_reg+0x20],$r8    ; Restore R8\n"
-"   move.d  [cris_reg+0x24],$r9    ; Restore R9\n"
-"   move.d  [cris_reg+0x28],$r10   ; Restore R10\n"
-"   move.d  [cris_reg+0x2C],$r11   ; Restore R11\n"
-"   move.d  [cris_reg+0x30],$r12   ; Restore R12\n"
-"   move.d  [cris_reg+0x34],$r13   ; Restore R13\n"
-";;\n"
-";; FIXME: Which registers should be restored?\n"
-";;\n"
-"   move.d  [cris_reg+0x38],$sp    ; Restore SP (R14)\n"
-"   move    [cris_reg+0x56],$srp   ; Restore the subroutine return pointer.\n"
-"   move    [cris_reg+0x5E],$dccr  ; Restore DCCR\n"
-"   move    [cris_reg+0x66],$usp   ; Restore USP\n"
-"   jump    [cris_reg+0x62]       ; A jump to the content in register BRP works.\n"
-"   nop                       ;\n"
-"\n");
-
-/* The hook for an interrupt generated by GDB. An internal stack is used
-   by the stub. The register image of the caller is stored in the structure
-   register_image. Interactive communication with the host is handled by
-   handle_exception and finally the register image is restored. Due to the
-   old assembler which does not recognise the break instruction and the
-   breakpoint return pointer hex-code is used. */
-
-void kgdb_handle_serial(void);
-
-asm ("\n"
-"  .global kgdb_handle_serial\n"
-"kgdb_handle_serial:\n"
-";;\n"
-";; Response to a serial interrupt\n"
-";;\n"
-"\n"
-"  move     $dccr,[cris_reg+0x5E] ; Save the flags in DCCR\n"
-"  di                        ; Disable interrupts\n"
-"  move.d   $r0,[cris_reg]        ; Save R0\n"
-"  move.d   $r1,[cris_reg+0x04]   ; Save R1\n"
-"  move.d   $r2,[cris_reg+0x08]   ; Save R2\n"
-"  move.d   $r3,[cris_reg+0x0C]   ; Save R3\n"
-"  move.d   $r4,[cris_reg+0x10]   ; Save R4\n"
-"  move.d   $r5,[cris_reg+0x14]   ; Save R5\n"
-"  move.d   $r6,[cris_reg+0x18]   ; Save R6\n"
-"  move.d   $r7,[cris_reg+0x1C]   ; Save R7\n"
-"  move.d   $r8,[cris_reg+0x20]   ; Save R8\n"
-"  move.d   $r9,[cris_reg+0x24]   ; Save R9\n"
-"  move.d   $r10,[cris_reg+0x28]  ; Save R10\n"
-"  move.d   $r11,[cris_reg+0x2C]  ; Save R11\n"
-"  move.d   $r12,[cris_reg+0x30]  ; Save R12\n"
-"  move.d   $r13,[cris_reg+0x34]  ; Save R13\n"
-"  move.d   $sp,[cris_reg+0x38]   ; Save SP (R14)\n"
-"  move     $irp,[cris_reg+0x3c]  ; Save the address in PC (R15)\n"
-"  clear.b  [cris_reg+0x40]      ; Clear P0\n"
-"  move     $vr,[cris_reg+0x41]   ; Save special register P1,\n"
-"  clear.w  [cris_reg+0x42]      ; Clear P4\n"
-"  move     $ccr,[cris_reg+0x44]  ; Save special register CCR\n"
-"  move     $mof,[cris_reg+0x46]  ; P7\n"
-"  clear.d  [cris_reg+0x4A]      ; Clear P8\n"
-"  move     $ibr,[cris_reg+0x4E]  ; P9,\n"
-"  move     $irp,[cris_reg+0x52]  ; P10,\n"
-"  move     $srp,[cris_reg+0x56]  ; P11,\n"
-"  move     $bar,[cris_reg+0x5A]  ; P12,\n"
-"                            ; P13, register DCCR already saved\n"
-";; Due to the old assembler-versions BRP might not be recognized\n"
-"  .word 0xE670              ; move brp,r0\n"
-"  move.d   $r0,[cris_reg+0x62]   ; Save the return address in BRP\n"
-"  move     $usp,[cris_reg+0x66]  ; USP\n"
-"\n"
-";; get the serial character (from debugport.c) and check if it is a ctrl-c\n"
-"\n"
-"  jsr getDebugChar\n"
-"  cmp.b 3, $r10\n"
-"  bne goback\n"
-"  nop\n"
-"\n"
-"  move.d  [cris_reg+0x5E], $r10		; Get DCCR\n"
-"  btstq	   8, $r10			; Test the U-flag.\n"
-"  bmi	   goback\n"
-"  nop\n"
-"\n"
-";;\n"
-";; Handle the communication\n"
-";;\n"
-"  move.d   internal_stack+1020,$sp ; Use the internal stack\n"
-"  moveq    2,$r10                   ; SIGINT\n"
-"  jsr      handle_exception       ; Interactive routine\n"
-"\n"
-"goback:\n"
-";;\n"
-";; Return to the caller\n"
-";;\n"
-"   move.d  [cris_reg],$r0         ; Restore R0\n"
-"   move.d  [cris_reg+0x04],$r1    ; Restore R1\n"
-"   move.d  [cris_reg+0x08],$r2    ; Restore R2\n"
-"   move.d  [cris_reg+0x0C],$r3    ; Restore R3\n"
-"   move.d  [cris_reg+0x10],$r4    ; Restore R4\n"
-"   move.d  [cris_reg+0x14],$r5    ; Restore R5\n"
-"   move.d  [cris_reg+0x18],$r6    ; Restore R6\n"
-"   move.d  [cris_reg+0x1C],$r7    ; Restore R7\n"
-"   move.d  [cris_reg+0x20],$r8    ; Restore R8\n"
-"   move.d  [cris_reg+0x24],$r9    ; Restore R9\n"
-"   move.d  [cris_reg+0x28],$r10   ; Restore R10\n"
-"   move.d  [cris_reg+0x2C],$r11   ; Restore R11\n"
-"   move.d  [cris_reg+0x30],$r12   ; Restore R12\n"
-"   move.d  [cris_reg+0x34],$r13   ; Restore R13\n"
-";;\n"
-";; FIXME: Which registers should be restored?\n"
-";;\n"
-"   move.d  [cris_reg+0x38],$sp    ; Restore SP (R14)\n"
-"   move    [cris_reg+0x56],$srp   ; Restore the subroutine return pointer.\n"
-"   move    [cris_reg+0x5E],$dccr  ; Restore DCCR\n"
-"   move    [cris_reg+0x66],$usp   ; Restore USP\n"
-"   reti                      ; Return from the interrupt routine\n"
-"   nop\n"
-"\n");
-
-/* Use this static breakpoint in the start-up only. */
-
-void
-breakpoint(void)
-{
-	kgdb_started = 1;
-	is_dyn_brkp = 0;     /* This is a static, not a dynamic breakpoint. */
-	__asm__ volatile ("break 8"); /* Jump to handle_breakpoint. */
-}
-
-/* initialize kgdb. doesn't break into the debugger, but sets up irq and ports */
-
-void
-kgdb_init(void)
-{
-	/* could initialize debug port as well but it's done in head.S already... */
-
-        /* breakpoint handler is now set in irq.c */
-	set_int_vector(8, kgdb_handle_serial);
-	
-	enableDebugIRQ();
-}
-
-/****************************** End of file **********************************/