[PATCH] CRIS update: misc patches

* Start threads with IRQs enabled.
* Move symbol exports to arch specific file.
* Prepare for real command line in the future.
* Handle csum for partition that crosses flash boundary.
* Set utsname.

Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 97 insertions, 32 deletions

diff --git a/arch/cris/arch-v10/boot/compressed/head.S b/arch/cris/arch-v10/boot/compressed/head.S
index 4cbdd4b1d9d6..e73f44c998d9 100644
--- a/arch/cris/arch-v10/boot/compressed/head.S
+++ b/arch/cris/arch-v10/boot/compressed/head.S
@@ -13,7 +13,8 @@
 #include <asm/arch/sv_addr_ag.h>
 
 #define RAM_INIT_MAGIC 0x56902387
-        
+#define COMMAND_LINE_MAGIC 0x87109563
+
         ;; Exported symbols
         
         .globl  _input_data
@@ -88,6 +89,12 @@ basse:	move.d	pc, r5
         cmp.d   r2, r1
         bcs     1b
         nop
+
+        ;;  Save command line magic and address.
+        move.d  _cmd_line_magic, $r12
+        move.d  $r10, [$r12]
+        move.d  _cmd_line_addr, $r12
+        move.d  $r11, [$r12]
         
         ;; Do the decompression and save compressed size in _inptr
 
@@ -98,7 +105,13 @@ basse:	move.d	pc, r5
 
         move.d  [_input_data], r9       ; flash address of compressed kernel
         add.d   [_inptr], r9            ; size of compressed kernel
-         
+
+        ;; Restore command line magic and address.
+        move.d  _cmd_line_magic, $r10
+        move.d  [$r10], $r10
+        move.d  _cmd_line_addr, $r11
+        move.d  [$r11], $r11
+
         ;; Enter the decompressed kernel
         move.d  RAM_INIT_MAGIC, r8      ; Tell kernel that DRAM is initialized
         jump    0x40004000      ; kernel is linked to this address
@@ -107,5 +120,8 @@ basse:	move.d	pc, r5
 
 _input_data:
         .dword  0               ; used by the decompressor
-
+_cmd_line_magic:
+        .dword 0
+_cmd_line_addr:
+        .dword 0
 #include "../../lib/hw_settings.S"
diff --git a/arch/cris/arch-v10/boot/rescue/head.S b/arch/cris/arch-v10/boot/rescue/head.S
index 8689ea972c46..addb2194de0f 100644
--- a/arch/cris/arch-v10/boot/rescue/head.S
+++ b/arch/cris/arch-v10/boot/rescue/head.S
@@ -1,4 +1,4 @@
-/* $Id: head.S,v 1.6 2003/04/09 08:12:43 pkj Exp $
+/* $Id: head.S,v 1.7 2005/03/07 12:11:06 starvik Exp $
  * 
  * Rescue code, made to reside at the beginning of the
  * flash-memory. when it starts, it checks a partition
@@ -121,12 +121,13 @@
         ;; 0x80000000 if loaded in flash (as it should be)
         ;; since etrax actually starts at address 2 when booting from flash, we
         ;; put a nop (2 bytes) here first so we dont accidentally skip the di
-        
+
         nop     
         di
 
         jump    in_cache        ; enter cached area instead
-in_cache:       
+in_cache:
+
 
         ;; first put a jump test to give a possibility of upgrading the rescue code
         ;; without erasing/reflashing the sector. we put a longword of -1 here and if
@@ -325,9 +326,29 @@ flash_ok:
         ;; result will be in r0
 checksum:
         moveq   0, $r0
-1:      addu.b  [$r1+], $r0
-        subq    1, $r2
-        bne     1b
+        moveq   CONFIG_ETRAX_FLASH1_SIZE, $r6
+
+        ;; If the first physical flash memory is exceeded wrap to the second one.
+        btstq   26, $r1         ; Are we addressing first flash?
+        bpl     1f
+        nop
+        clear.d $r6
+
+1:      test.d  $r6             ; 0 = no wrapping
+        beq     2f
+        nop
+        lslq    20, $r6         ; Convert MB to bytes
+        sub.d   $r1, $r6
+
+2:      addu.b  [$r1+], $r0
+        subq    1, $r6          ; Flash memory left
+        beq     3f
+        subq    1, $r2          ; Length left
+        bne     2b
         nop
         ret
         nop
+
+3:      move.d  MEM_CSE1_START, $r1 ; wrap to second flash
+        ba      2b
+        nop
diff --git a/arch/cris/arch-v10/kernel/entry.S b/arch/cris/arch-v10/kernel/entry.S
index 1bc44f481c34..c0163bf94a50 100644
--- a/arch/cris/arch-v10/kernel/entry.S
+++ b/arch/cris/arch-v10/kernel/entry.S
@@ -1,4 +1,4 @@
-/* $Id: entry.S,v 1.23 2004/10/19 13:07:37 starvik Exp $
+/* $Id: entry.S,v 1.28 2005/06/20 05:06:30 starvik Exp $
  *
  *  linux/arch/cris/entry.S
  *
@@ -7,6 +7,22 @@
  *  Authors:    Bjorn Wesen (bjornw@axis.com)
  *
  *  $Log: entry.S,v $
+ *  Revision 1.28  2005/06/20 05:06:30  starvik
+ *  Remove unnecessary diff to kernel.org tree
+ *
+ *  Revision 1.27  2005/03/04 08:16:16  starvik
+ *  Merge of Linux 2.6.11.
+ *
+ *  Revision 1.26  2005/01/11 13:49:47  starvik
+ *  Added NMI handler.
+ *
+ *  Revision 1.25  2004/12/27 11:18:32  starvik
+ *  Merge of Linux 2.6.10 (not functional yet).
+ *
+ *  Revision 1.24  2004/12/22 10:41:23  starvik
+ *  Updates to make v10 compile with the latest SMP aware generic code (even
+ *  though v10 will never have SMP).
+ *
  *  Revision 1.23  2004/10/19 13:07:37  starvik
  *  Merge of Linux 2.6.9
  *
@@ -279,6 +295,7 @@
 #ifdef CONFIG_PREEMPT   
         ; Check if preemptive kernel scheduling should be done
 _resume_kernel:
+        di
         ; Load current task struct
         movs.w  -8192, $r0      ;  THREAD_SIZE = 8192
         and.d   $sp, $r0
@@ -291,12 +308,7 @@ _need_resched:
         bpl     _Rexit
         nop
         ; Ok, lets's do some preemptive kernel scheduling
-        move.d  PREEMPT_ACTIVE, $r10
-        move.d  $r10, [$r0+TI_preempt_count] ; Mark as active
-        ei
-        jsr     schedule
-        clear.d [$r0+TI_preempt_count] ;  Mark as inactive
-        di
+        jsr     preempt_schedule_irq
         ; Load new task struct
         movs.w  -8192, $r0      ;  THREAD_SIZE = 8192
         and.d   $sp, $r0
@@ -590,15 +602,15 @@ mmu_bus_fault:
         move.d  $r0, [$sp+16]
 1:      btstq   12, $r1            ; Refill?
         bpl     2f
-        lsrq    PMD_SHIFT, $r1     ; Get PMD index into PGD (bit 24-31)
-        move.d  [current_pgd], $r0 ; PGD for the current process
+        lsrq    24, $r1     ; Get PGD index (bit 24-31)
+        move.d  [per_cpu__current_pgd], $r0 ; PGD for the current process
         move.d  [$r0+$r1.d], $r0   ; Get PMD
         beq     2f
         nop
         and.w   PAGE_MASK, $r0     ; Remove PMD flags
         move.d  [R_MMU_CAUSE], $r1
         lsrq    PAGE_SHIFT, $r1
-        and.d   0x7ff, $r1         ; Get PTE index into PMD (bit 13-24)
+        and.d   0x7ff, $r1         ; Get PTE index into PGD (bit 13-23)
         move.d  [$r0+$r1.d], $r1   ; Get PTE
         beq     2f
         nop
@@ -656,11 +668,6 @@ hwbreakpoint:
         nop
         
 IRQ1_interrupt:
-
-#if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM)
-;; If we receive a watchdog interrupt while it is not expected, then set
-;; up a canonical frame and dump register contents before dying.
-
         ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
         move    $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
         push    $srp
@@ -672,9 +679,16 @@ IRQ1_interrupt:
         push    $r10            ; push orig_r10
         clear.d [$sp=$sp-4]     ; frametype == 0, normal frame
 
-;; We don't check that we actually were bit by the watchdog as opposed to
-;; an external NMI, since there is currently no handler for external NMI.
-
+        move.d  [R_IRQ_MASK0_RD], $r1 ; External NMI or watchdog?
+        and.d   0x80000000, $r1
+        beq     wdog
+        move.d  $sp, $r10
+        jsr     handle_nmi
+        setf m                  ; Enable NMI again
+        retb                    ; Return from NMI
+        nop
+wdog:
+#if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM)
 ;; Check if we're waiting for reset to happen, as signalled by
 ;; hard_reset_now setting cause_of_death to a magic value.  If so, just
 ;; get stuck until reset happens.
@@ -1118,6 +1132,10 @@ sys_call_table:
         .long sys_mq_getsetattr
         .long sys_ni_syscall            /* reserved for kexec */
         .long sys_waitid
+        .long sys_ni_syscall            /* 285 */ /* available */
+        .long sys_add_key
+        .long sys_request_key
+        .long sys_keyctl
 
         /*
          * NOTE!! This doesn't have to be exact - we just have
diff --git a/arch/cris/arch-v10/kernel/kgdb.c b/arch/cris/arch-v10/kernel/kgdb.c
index 7d368c877ee9..b72e6a91a639 100644
--- a/arch/cris/arch-v10/kernel/kgdb.c
+++ b/arch/cris/arch-v10/kernel/kgdb.c
@@ -18,6 +18,10 @@
 *! Jul 21 1999  Bjorn Wesen     eLinux port
 *!
 *! $Log: kgdb.c,v $
+*! Revision 1.6  2005/01/14 10:12:17  starvik
+*! KGDB on separate port.
+*! Console fixes from 2.4.
+*!
 *! Revision 1.5  2004/10/07 13:59:08  starvik
 *! Corrected call to set_int_vector
 *!
@@ -71,7 +75,7 @@
 *!
 *!---------------------------------------------------------------------------
 *!
-*! $Id: kgdb.c,v 1.5 2004/10/07 13:59:08 starvik Exp $
+*! $Id: kgdb.c,v 1.6 2005/01/14 10:12:17 starvik Exp $
 *!
 *! (C) Copyright 1999, Axis Communications AB, LUND, SWEDEN
 *!
@@ -225,6 +229,7 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/linkage.h>
+#include <linux/reboot.h>
 
 #include <asm/setup.h>
 #include <asm/ptrace.h>
@@ -1344,12 +1349,11 @@ handle_exception (int sigval)
         }
 }
 
-/* The jump is to the address 0x00000002. Performs a complete re-start
-   from scratch. */
+/* Performs a complete re-start from scratch. */
 static void
 kill_restart ()
 {
-        __asm__ volatile ("jump 2");
+        machine_restart("");
 }
 
 /********************************** Breakpoint *******************************/
@@ -1506,6 +1510,11 @@ kgdb_handle_serial:
   bne goback
   nop
 
+  move.d  [reg+0x5E], $r10              ; Get DCCR
+  btstq    8, $r10                      ; Test the U-flag.
+  bmi      goback
+  nop
+
 ;;
 ;; Handle the communication
 ;;
diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c
index 87ff37790827..69e28b4057e8 100644
--- a/arch/cris/arch-v10/kernel/process.c
+++ b/arch/cris/arch-v10/kernel/process.c
@@ -1,4 +1,4 @@
-/* $Id: process.c,v 1.9 2004/10/19 13:07:37 starvik Exp $
+/* $Id: process.c,v 1.12 2004/12/27 11:18:32 starvik Exp $
  * 
  *  linux/arch/cris/kernel/process.c
  *
@@ -101,6 +101,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
         regs.r11 = (unsigned long)fn;
         regs.r12 = (unsigned long)arg;
         regs.irp = (unsigned long)kernel_thread_helper;
+        regs.dccr = 1 << I_DCCR_BITNR;
 
         /* Ok, create the new process.. */
         return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);