[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>

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"

arch/cris/arch-v10/boot/rescue/head.S

-/* $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

arch/cris/arch-v10/kernel/entry.S

-/* $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

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 @@ asm ("
   bne goback
   nop
 
+  move.d  [reg+0x5E], $r10		; Get DCCR
+  btstq	   8, $r10			; Test the U-flag.
+  bmi	   goback
+  nop
+
 ;;
 ;; Handle the communication
 ;;

arch/cris/arch-v10/kernel/process.c

-/* $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);

arch/cris/kernel/crisksyms.c

@@ -27,13 +27,13 @@ extern void __Udiv(void);
 extern void __Umod(void);
 extern void __Div(void);
 extern void __Mod(void);
+extern void __ashldi3(void);
 extern void __ashrdi3(void);
-extern void iounmap(void *addr);
+extern void __lshrdi3(void);
+extern void iounmap(volatile void * __iomem);
 
 /* Platform dependent support */
 EXPORT_SYMBOL(dump_thread);
-EXPORT_SYMBOL(enable_irq);
-EXPORT_SYMBOL(disable_irq);
 EXPORT_SYMBOL(kernel_thread);
 EXPORT_SYMBOL(get_cmos_time);
 EXPORT_SYMBOL(loops_per_usec);
@@ -57,7 +57,9 @@ EXPORT_SYMBOL(__Udiv);
 EXPORT_SYMBOL(__Umod);
 EXPORT_SYMBOL(__Div);
 EXPORT_SYMBOL(__Mod);
+EXPORT_SYMBOL(__ashldi3);
 EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__lshrdi3);
 
 /* Memory functions */
 EXPORT_SYMBOL(__ioremap);
@@ -69,23 +71,10 @@ EXPORT_SYMBOL(__down);
 EXPORT_SYMBOL(__down_interruptible);
 EXPORT_SYMBOL(__down_trylock);
 
-/* Export shadow registers for the CPU I/O pins */
-EXPORT_SYMBOL(genconfig_shadow);
-EXPORT_SYMBOL(port_pa_data_shadow);
-EXPORT_SYMBOL(port_pa_dir_shadow);
-EXPORT_SYMBOL(port_pb_data_shadow);
-EXPORT_SYMBOL(port_pb_dir_shadow);
-EXPORT_SYMBOL(port_pb_config_shadow);
-EXPORT_SYMBOL(port_g_data_shadow);
-
 /* Userspace access functions */
 EXPORT_SYMBOL(__copy_user_zeroing);
 EXPORT_SYMBOL(__copy_user);
 
-/* Cache flush functions */
-EXPORT_SYMBOL(flush_etrax_cache);
-EXPORT_SYMBOL(prepare_rx_descriptor);
-
 #undef memcpy
 #undef memset
 extern void * memset(void *, int, __kernel_size_t);

arch/cris/kernel/setup.c

@@ -17,6 +17,7 @@
 #include <asm/pgtable.h>
 #include <linux/seq_file.h>
 #include <linux/tty.h>
+#include <linux/utsname.h>
 
 #include <asm/setup.h>
 
@@ -29,7 +30,7 @@ struct screen_info screen_info;
 extern int root_mountflags;
 extern char _etext, _edata, _end;
 
-static char command_line[COMMAND_LINE_SIZE] = { 0, };
+char cris_command_line[COMMAND_LINE_SIZE] = { 0, };
 
 extern const unsigned long text_start, edata; /* set by the linker script */
 extern unsigned long dram_start, dram_end;
@@ -147,34 +148,35 @@ setup_arch(char **cmdline_p)
 
 	paging_init();
 
-	/* We don't use a command line yet, so just re-initialize it without
-	   saving anything that might be there.  */
-
-	*cmdline_p = command_line;
+	*cmdline_p = cris_command_line;
 
 #ifdef CONFIG_ETRAX_CMDLINE
-	strlcpy(command_line, CONFIG_ETRAX_CMDLINE, COMMAND_LINE_SIZE);
-	command_line[COMMAND_LINE_SIZE - 1] = '\0';
+        if (!strcmp(cris_command_line, "")) {
+		strlcpy(cris_command_line, CONFIG_ETRAX_CMDLINE, COMMAND_LINE_SIZE);
+		cris_command_line[COMMAND_LINE_SIZE - 1] = '\0';
+	}
+#endif
 
 	/* Save command line for future references. */
-	memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+	memcpy(saved_command_line, cris_command_line, COMMAND_LINE_SIZE);
 	saved_command_line[COMMAND_LINE_SIZE - 1] = '\0';
-#endif
 
 	/* give credit for the CRIS port */
 	show_etrax_copyright();
+
+	/* Setup utsname */
+	strcpy(system_utsname.machine, cris_machine_name);
 }
 
 static void *c_start(struct seq_file *m, loff_t *pos)
 {
-	/* We only got one CPU... */
-	return *pos < 1 ? (void *)1 : NULL;
+	return *pos < NR_CPUS ? (void *)(int)(*pos + 1): NULL;
 }
 
 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	++*pos;
-	return NULL;
+	return c_start(m, pos);
 }
 
 static void c_stop(struct seq_file *m, void *v)

include/asm-cris/arch-v10/system.h

@@ -11,6 +11,8 @@ extern inline unsigned long rdvr(void) {
 	return vr;
 }
 
+#define cris_machine_name "cris"
+
 /* read/write the user-mode stackpointer */
 
 extern inline unsigned long rdusp(void) {

include/asm-cris/axisflashmap.h

@@ -40,4 +40,7 @@ struct partitiontable_entry {
 #define PARTITION_TYPE_KERNEL 0x0002
 #define PARTITION_TYPE_JFFS   0x0003
 
+/* The master mtd for the entire flash. */
+extern struct mtd_info* axisflash_mtd;
+
 #endif