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, 552 deletions

diff --git a/arch/cris/arch-v32/kernel/kgdb_asm.S b/arch/cris/arch-v32/kernel/kgdb_asm.S
deleted file mode 100644
index c26ea6b0e334..000000000000
--- a/arch/cris/arch-v32/kernel/kgdb_asm.S
+++ /dev/null
@@ -1,552 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- *  Copyright (C) 2004 Axis Communications AB
- *
- * Code for handling break 8, hardware breakpoint, single step, and serial
- * port exceptions for kernel debugging purposes.
- */
-
-#include <hwregs/intr_vect.h>
-
-	;; Exported functions.
-	.globl kgdb_handle_exception
-
-kgdb_handle_exception:
-
-;; Create a register image of the caller.
-;;
-;; First of all, save the ACR on the stack since we need it for address calculations.
-;; We put it into the register struct later.
-
-  subq     4, $sp
-  move.d   $acr, [$sp]
-
-;; Now we are free to use ACR all we want.
-;; If we were running this handler with interrupts on, we would have to be careful
-;; to save and restore CCS manually, but since we aren't we treat it like every other
-;; register.
-
-  move.d   reg,  $acr
-  move.d   $r0,  [$acr]        ; Save R0 (start of register struct)
-  addq     4,    $acr
-  move.d   $r1,  [$acr]        ; Save R1
-  addq     4,    $acr
-  move.d   $r2,  [$acr]        ; Save R2
-  addq     4,    $acr
-  move.d   $r3,  [$acr]        ; Save R3
-  addq     4,    $acr
-  move.d   $r4,  [$acr]        ; Save R4
-  addq     4,    $acr
-  move.d   $r5,  [$acr]        ; Save R5
-  addq     4,    $acr
-  move.d   $r6,  [$acr]        ; Save R6
-  addq     4,    $acr
-  move.d   $r7,  [$acr]        ; Save R7
-  addq     4,    $acr
-  move.d   $r8,  [$acr]        ; Save R8
-  addq     4,    $acr
-  move.d   $r9,  [$acr]        ; Save R9
-  addq     4,    $acr
-  move.d   $r10, [$acr]        ; Save R10
-  addq     4,    $acr
-  move.d   $r11, [$acr]        ; Save R11
-  addq     4,    $acr
-  move.d   $r12, [$acr]        ; Save R12
-  addq     4,    $acr
-  move.d   $r13, [$acr]        ; Save R13
-  addq     4,    $acr
-  move.d   $sp,  [$acr]        ; Save SP (R14)
-  addq     4,    $acr
-
-  ;; The ACR register is already saved on the stack, so pop it from there.
-  move.d   [$sp],$r0
-  move.d   $r0,  [$acr]
-  addq     4,    $acr
-
-  move     $bz,  [$acr]
-  addq     1,    $acr
-  move     $vr,  [$acr]
-  addq     1,    $acr
-  move     $pid, [$acr]
-  addq     4,    $acr
-  move     $srs, [$acr]
-  addq     1,    $acr
-  move     $wz,  [$acr]
-  addq     2,    $acr
-  move     $exs, [$acr]
-  addq     4,    $acr
-  move     $eda, [$acr]
-  addq     4,    $acr
-  move     $mof, [$acr]
-  addq     4,    $acr
-  move     $dz,  [$acr]
-  addq     4,    $acr
-  move     $ebp, [$acr]
-  addq     4,    $acr
-  move     $erp, [$acr]
-  addq     4,    $acr
-  move     $srp, [$acr]
-  addq     4,    $acr
-  move     $nrp, [$acr]
-  addq     4,    $acr
-  move     $ccs, [$acr]
-  addq     4,    $acr
-  move     $usp, [$acr]
-  addq     4,    $acr
-  move     $spc, [$acr]
-  addq     4,     $acr
-
-;; Skip the pseudo-PC.
-  addq     4,     $acr
-
-;; Save the support registers in bank 0 - 3.
-  clear.d $r1 ; Bank counter
-  move.d  sreg, $acr
-
-;; Bank 0
-  move    $r1,  $srs
-  nop
-  nop
-  nop
-  move    $s0,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s1,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s2,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s3,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s4,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s5,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s6,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s7,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s8,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s9,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s10,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s11,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s12,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-
-  ;; Nothing in S13 - S15, bank 0
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-
-;; Bank 1 and bank 2 have the same layout, hence the loop.
-  addq    1, $r1
-1:
-  move    $r1,  $srs
-  nop
-  nop
-  nop
-  move    $s0,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s1,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s2,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s3,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s4,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s5,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s6,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-
-  ;; Nothing in S7 - S15, bank 1 and 2
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-  clear.d [$acr]
-  addq    4,     $acr
-
-  addq 1, $r1
-  cmpq 3, $r1
-  bne 1b
-  nop
-
-;; Bank 3
-  move    $r1,  $srs
-  nop
-  nop
-  nop
-  move    $s0,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s1,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s2,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s3,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s4,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s5,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s6,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s7,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s8,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s9,   $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s10,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s11,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s12,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s13,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-  move    $s14,  $r0
-  move.d  $r0,   [$acr]
-  addq    4,     $acr
-;; Nothing in S15, bank 3
-  clear.d [$acr]
-  addq    4,     $acr
-
-;; Check what got us here: get IDX field of EXS.
-  move $exs,    $r10
-  and.d 0xff00, $r10
-  lsrq 8,       $r10
-#if defined(CONFIG_ETRAX_KGDB_PORT0)
-  cmp.d SER0_INTR_VECT,   $r10 ; IRQ for serial port 0
-  beq sigint
-  nop
-#elif defined(CONFIG_ETRAX_KGDB_PORT1)
-  cmp.d SER1_INTR_VECT,   $r10 ; IRQ for serial port 1
-  beq sigint
-  nop
-#elif defined(CONFIG_ETRAX_KGDB_PORT2)
-  cmp.d SER2_INTR_VECT,   $r10 ; IRQ for serial port 2
-  beq sigint
-  nop
-#elif defined(CONFIG_ETRAX_KGDB_PORT3)
-  cmp.d SER3_INTR_VECT,   $r10 ; IRQ for serial port 3
-  beq sigint
-  nop
-#endif
-;; Multiple interrupt must be due to serial break.
-  cmp.d 0x30,   $r10 ; Multiple interrupt
-  beq sigint
-  nop
-;; Neither of those? Then it's a sigtrap.
-  ba handle_comm
-  moveq 5, $r10      ; Set SIGTRAP (delay slot)
-
-sigint:
-  ;; Serial interrupt; get character
-  jsr getDebugChar
-  nop                ; Delay slot
-  cmp.b 3, $r10      ; \003 (Ctrl-C)?
-  bne return         ; No, get out of here
-  nop
-  moveq 2, $r10      ; Set SIGINT
-
-;;
-;; Handle the communication
-;;
-handle_comm:
-  move.d   internal_stack+1020, $sp ; Use the internal stack which grows upwards
-  jsr      handle_exception         ; Interactive routine
-  nop
-
-;;
-;; Return to the caller
-;;
-return:
-
-;; First of all, write the support registers.
-  clear.d $r1 ; Bank counter
-  move.d  sreg, $acr
-
-;; Bank 0
-  move    $r1,  $srs
-  nop
-  nop
-  nop
-  move.d  [$acr], $r0
-  move    $r0,    $s0
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s1
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s2
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s3
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s4
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s5
-  addq    4,      $acr
-
-;; Nothing in S6 - S7, bank 0.
-  addq    4,      $acr
-  addq    4,      $acr
-
-  move.d  [$acr], $r0
-  move    $r0,    $s8
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s9
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s10
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s11
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s12
-  addq    4,      $acr
-
-;; Nothing in S13 - S15, bank 0
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-
-;; Bank 1 and bank 2 have the same layout, hence the loop.
-  addq    1, $r1
-2:
-  move    $r1,  $srs
-  nop
-  nop
-  nop
-  move.d  [$acr], $r0
-  move    $r0,    $s0
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s1
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s2
-  addq    4,      $acr
-
-;; S3 (MM_CAUSE) is read-only.
-  addq    4,      $acr
-
-  move.d  [$acr], $r0
-  move    $r0,    $s4
-  addq    4,      $acr
-
-;; FIXME: Actually write S5/S6? (Affects MM_CAUSE.)
-  addq    4,      $acr
-  addq    4,      $acr
-
-;; Nothing in S7 - S15, bank 1 and 2
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-  addq    4,      $acr
-
-  addq 1, $r1
-  cmpq 3, $r1
-  bne 2b
-  nop
-
-;; Bank 3
-  move    $r1,  $srs
-  nop
-  nop
-  nop
-  move.d  [$acr], $r0
-  move    $r0,    $s0
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s1
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s2
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s3
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s4
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s5
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s6
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s7
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s8
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s9
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s10
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s11
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s12
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s13
-  addq    4,      $acr
-  move.d  [$acr], $r0
-  move    $r0,    $s14
-  addq    4,      $acr
-
-;; Nothing in S15, bank 3
-  addq    4,      $acr
-
-;; Now, move on to the regular register restoration process.
-
-   move.d  reg,    $acr   ; Reset ACR to point at the beginning of the register image
-   move.d  [$acr], $r0    ; Restore R0
-   addq    4,      $acr
-   move.d  [$acr], $r1    ; Restore R1
-   addq    4,      $acr
-   move.d  [$acr], $r2    ; Restore R2
-   addq    4,      $acr
-   move.d  [$acr], $r3    ; Restore R3
-   addq    4,      $acr
-   move.d  [$acr], $r4    ; Restore R4
-   addq    4,      $acr
-   move.d  [$acr], $r5    ; Restore R5
-   addq    4,      $acr
-   move.d  [$acr], $r6    ; Restore R6
-   addq    4,      $acr
-   move.d  [$acr], $r7    ; Restore R7
-   addq    4,      $acr
-   move.d  [$acr], $r8    ; Restore R8
-   addq    4,      $acr
-   move.d  [$acr], $r9    ; Restore R9
-   addq    4,      $acr
-   move.d  [$acr], $r10   ; Restore R10
-   addq    4,      $acr
-   move.d  [$acr], $r11   ; Restore R11
-   addq    4,      $acr
-   move.d  [$acr], $r12   ; Restore R12
-   addq    4,      $acr
-   move.d  [$acr], $r13   ; Restore R13
-
-;;
-;; We restore all registers, even though some of them probably haven't changed.
-;;
-
-   addq    4,      $acr
-   move.d  [$acr], $sp    ; Restore SP (R14)
-
-   ;; ACR cannot be restored just yet.
-   addq    8,      $acr
-
-   ;; Skip BZ, VR.
-   addq    2,      $acr
-
-   move    [$acr], $pid   ; Restore PID
-   addq    4,      $acr
-   move    [$acr], $srs   ; Restore SRS
-   nop
-   nop
-   nop
-   addq    1,      $acr
-
-   ;; Skip WZ.
-   addq    2,      $acr
-
-   move    [$acr], $exs    ; Restore EXS.
-   addq    4,      $acr
-   move    [$acr], $eda    ; Restore EDA.
-   addq    4,      $acr
-   move    [$acr], $mof    ; Restore MOF.
-
-   ;; Skip DZ.
-   addq    8,      $acr
-
-   move    [$acr], $ebp    ; Restore EBP.
-   addq    4,      $acr
-   move    [$acr], $erp    ; Restore ERP.
-   addq    4,      $acr
-   move    [$acr], $srp    ; Restore SRP.
-   addq    4,      $acr
-   move    [$acr], $nrp    ; Restore NRP.
-   addq    4,      $acr
-   move    [$acr], $ccs    ; Restore CCS like an ordinary register.
-   addq    4,      $acr
-   move    [$acr], $usp    ; Restore USP
-   addq    4,      $acr
-   move    [$acr], $spc    ; Restore SPC
-                           ; No restoration of pseudo-PC of course.
-
-   move.d  reg,    $acr    ; Reset ACR to point at the beginning of the register image
-   add.d   15*4,   $acr
-   move.d  [$acr], $acr    ; Finally, restore ACR.
-   rete                    ; Same as jump ERP
-   rfe                     ; Shifts CCS