[U-Boot] [PATCH 0/5] kgdb cleanup and Blackfin kgdb port

[U-Boot] [PATCH 0/5] kgdb cleanup and Blackfin kgdb port

[Mike Frysinger]

I can take care of merging the Blackfin-specific KGDB piece through my
tree since it depends on some other Blackfin patches.  But all the KGDB
common changes can be merged now.

Mike Frysinger (1):
  kgdb: drop duplicate debugger_exception_handler

Robin Getz (4):
  kgdb: add default generic stubs
  kgdb: update mem2hex/hex2mem funcs
  asm-generic/signal.h: import from linux
  Blackfin: add support for kgdb

 common/Makefile                              |    2 +-
 common/kgdb.c                                |   43 ++-
 common/kgdb_stubs.c                          |   64 ++++
 cpu/74xx_7xx/traps.c                         |    4 -
 cpu/blackfin/interrupt.S                     |  105 +++++++
 cpu/blackfin/traps.c                         |   57 ++++-
 cpu/mpc5xx/traps.c                           |    4 -
 cpu/mpc5xxx/traps.c                          |    4 -
 cpu/mpc8220/traps.c                          |    4 -
 cpu/mpc8260/traps.c                          |    4 -
 cpu/mpc85xx/traps.c                          |    4 -
 cpu/mpc86xx/traps.c                          |    4 -
 cpu/mpc8xx/traps.c                           |    4 -
 cpu/ppc4xx/traps.c                           |    4 -
 include/asm-blackfin/config.h                |    7 +
 include/asm-blackfin/deferred.h              |   20 ++
 include/asm-blackfin/entry.h                 |   10 +
 include/asm-blackfin/mach-common/bits/core.h |    3 +
 include/asm-blackfin/signal.h                |    1 +
 include/asm-generic/signal.h                 |  101 ++++++
 include/configs/bfin_adi_common.h            |    1 +
 lib_blackfin/Makefile                        |    2 +
 lib_blackfin/__kgdb.S                        |  155 ++++++++++
 lib_blackfin/board.c                         |    6 +
 lib_blackfin/kgdb.c                          |  423 ++++++++++++++++++++++++++
 lib_blackfin/kgdb.h                          |  160 ++++++++++
 lib_blackfin/string.c                        |   44 +++-
 27 files changed, 1180 insertions(+), 60 deletions(-)
 create mode 100644 common/kgdb_stubs.c
 create mode 100644 include/asm-blackfin/deferred.h
 create mode 100644 include/asm-blackfin/signal.h
 create mode 100644 include/asm-generic/signal.h
 create mode 100644 lib_blackfin/__kgdb.S
 create mode 100644 lib_blackfin/kgdb.c
 create mode 100644 lib_blackfin/kgdb.h

[U-Boot] [PATCH 1/5] kgdb: add default generic stubs

[Mike Frysinger]

From: Robin Getz <robin.getz@analog.com>

The default kgdb functions can be implemented with common U-Boot functions,
so rather than force everyone to copy & paste these things, create a set of
weak stubs.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 common/Makefile     |    2 +-
 common/kgdb_stubs.c |   64 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletions(-)
 create mode 100644 common/kgdb_stubs.c

diff --git a/common/Makefile b/common/Makefile
index 44fe687..d054cbe 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -149,7 +149,7 @@ COBJS-$(CONFIG_DDR_SPD) += ddr_spd.o
 COBJS-$(CONFIG_HWCONFIG) += hwconfig.o
 COBJS-$(CONFIG_CONSOLE_MUX) += iomux.o
 COBJS-y += flash.o
-COBJS-$(CONFIG_CMD_KGDB) += kgdb.o
+COBJS-$(CONFIG_CMD_KGDB) += kgdb.o kgdb_stubs.o
 COBJS-$(CONFIG_KALLSYMS) += kallsyms.o
 COBJS-$(CONFIG_LCD) += lcd.o
 COBJS-$(CONFIG_LYNXKDI) += lynxkdi.o
diff --git a/common/kgdb_stubs.c b/common/kgdb_stubs.c
new file mode 100644
index 0000000..19b0c18
--- /dev/null
+++ b/common/kgdb_stubs.c
@@ -0,0 +1,64 @@
+/*
+ * U-boot - stub functions for common kgdb code,
+ *          can be overridden in board specific files
+ *
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <kgdb.h>
+
+int (*debugger_exception_handler)(struct pt_regs *);
+
+__attribute__((weak))
+void kgdb_serial_init(void)
+{
+	puts("[on serial] ");
+}
+
+__attribute__((weak))
+void putDebugChar(int c)
+{
+	serial_putc(c);
+}
+
+__attribute__((weak))
+void putDebugStr(const char *str)
+{
+#ifdef DEBUG
+	serial_puts(str);
+#endif
+}
+
+__attribute__((weak))
+int getDebugChar(void)
+{
+	return serial_getc();
+}
+
+__attribute__((weak))
+void kgdb_interruptible(int yes)
+{
+	return;
+}
+
+__attribute__((weak))
+void kgdb_flush_cache_range(void *from, void *to)
+{
+	flush_cache((unsigned long)from, (unsigned long)(to - from));
+}
+
+__attribute__((weak))
+void kgdb_flush_cache_all(void)
+{
+	if (dcache_status()) {
+		dcache_disable();
+		dcache_enable();
+	}
+	if (icache_status()) {
+		icache_disable();
+		icache_enable();
+	}
+}
-- 
1.6.5.4

[U-Boot] [PATCH 1/5] kgdb: add default generic stubs

[Wolfgang Denk]

Dear Mike Frysinger,

In message <1261438846-9675-2-git-send-email-vapier@gentoo.org> you wrote:
> From: Robin Getz <robin.getz@analog.com>
> 
> The default kgdb functions can be implemented with common U-Boot functions,
> so rather than force everyone to copy & paste these things, create a set of
> weak stubs.
> 
> Signed-off-by: Robin Getz <robin.getz@analog.com>
> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
> ---
>  common/Makefile     |    2 +-
>  common/kgdb_stubs.c |   64 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 65 insertions(+), 1 deletions(-)
>  create mode 100644 common/kgdb_stubs.c

Applied, thanks.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
A stone was placed at a ford in a river with the inscription:
"When this stone is covered it is dangerous to ford here."

[U-Boot] [PATCH 2/5] kgdb: drop duplicate debugger_exception_handler

[Mike Frysinger]

The debugger_exception_handler definition is the same for everyone, so use
the common one now.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 cpu/74xx_7xx/traps.c |    4 ----
 cpu/mpc5xx/traps.c   |    4 ----
 cpu/mpc5xxx/traps.c  |    4 ----
 cpu/mpc8220/traps.c  |    4 ----
 cpu/mpc8260/traps.c  |    4 ----
 cpu/mpc85xx/traps.c  |    4 ----
 cpu/mpc86xx/traps.c  |    4 ----
 cpu/mpc8xx/traps.c   |    4 ----
 cpu/ppc4xx/traps.c   |    4 ----
 9 files changed, 0 insertions(+), 36 deletions(-)

diff --git a/cpu/74xx_7xx/traps.c b/cpu/74xx_7xx/traps.c
index b066227..24e28e2 100644
--- a/cpu/74xx_7xx/traps.c
+++ b/cpu/74xx_7xx/traps.c
@@ -40,10 +40,6 @@
 DECLARE_GLOBAL_DATA_PTR;
 #endif
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table(unsigned long);
 
diff --git a/cpu/mpc5xx/traps.c b/cpu/mpc5xx/traps.c
index 78c820a..cc8e091 100644
--- a/cpu/mpc5xx/traps.c
+++ b/cpu/mpc5xx/traps.c
@@ -36,10 +36,6 @@
 #include <command.h>
 #include <asm/processor.h>
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 #if defined(CONFIG_CMD_BEDBUG)
 extern void do_bedbug_breakpoint(struct pt_regs *);
 #endif
diff --git a/cpu/mpc5xxx/traps.c b/cpu/mpc5xxx/traps.c
index daa1ec6..2a09153 100644
--- a/cpu/mpc5xxx/traps.c
+++ b/cpu/mpc5xxx/traps.c
@@ -37,10 +37,6 @@
 #include <command.h>
 #include <asm/processor.h>
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table(unsigned long);
 
diff --git a/cpu/mpc8220/traps.c b/cpu/mpc8220/traps.c
index 89cca1d..f98d40f 100644
--- a/cpu/mpc8220/traps.c
+++ b/cpu/mpc8220/traps.c
@@ -37,10 +37,6 @@
 #include <command.h>
 #include <asm/processor.h>
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler) (struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table (unsigned long);
 
diff --git a/cpu/mpc8260/traps.c b/cpu/mpc8260/traps.c
index 6624544..f9f4dea 100644
--- a/cpu/mpc8260/traps.c
+++ b/cpu/mpc8260/traps.c
@@ -37,10 +37,6 @@
 #include <asm/processor.h>
 #include <asm/m8260_pci.h>
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table(unsigned long);
 
diff --git a/cpu/mpc85xx/traps.c b/cpu/mpc85xx/traps.c
index 9d16b9b..241ebd5 100644
--- a/cpu/mpc85xx/traps.c
+++ b/cpu/mpc85xx/traps.c
@@ -42,10 +42,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table(unsigned long);
 
diff --git a/cpu/mpc86xx/traps.c b/cpu/mpc86xx/traps.c
index 13f386d..ad005c3 100644
--- a/cpu/mpc86xx/traps.c
+++ b/cpu/mpc86xx/traps.c
@@ -36,10 +36,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table(unsigned long);
 
diff --git a/cpu/mpc8xx/traps.c b/cpu/mpc8xx/traps.c
index e1ec889..f357c8d 100644
--- a/cpu/mpc8xx/traps.c
+++ b/cpu/mpc8xx/traps.c
@@ -36,10 +36,6 @@
 #include <command.h>
 #include <asm/processor.h>
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 #if defined(CONFIG_CMD_BEDBUG)
 extern void do_bedbug_breakpoint(struct pt_regs *);
 #endif
diff --git a/cpu/ppc4xx/traps.c b/cpu/ppc4xx/traps.c
index 55154b6..cb35faf 100644
--- a/cpu/ppc4xx/traps.c
+++ b/cpu/ppc4xx/traps.c
@@ -38,10 +38,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#if defined(CONFIG_CMD_KGDB)
-int (*debugger_exception_handler)(struct pt_regs *) = 0;
-#endif
-
 /* Returns 0 if exception not found and fixup otherwise.  */
 extern unsigned long search_exception_table(unsigned long);
 
-- 
1.6.5.4

[U-Boot] [PATCH 2/5] kgdb: drop duplicate debugger_exception_handler

[Wolfgang Denk]

Dear Mike Frysinger,

In message <1261438846-9675-3-git-send-email-vapier@gentoo.org> you wrote:
> The debugger_exception_handler definition is the same for everyone, so use
> the common one now.
> 
> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
> ---
>  cpu/74xx_7xx/traps.c |    4 ----
>  cpu/mpc5xx/traps.c   |    4 ----
>  cpu/mpc5xxx/traps.c  |    4 ----
>  cpu/mpc8220/traps.c  |    4 ----
>  cpu/mpc8260/traps.c  |    4 ----
>  cpu/mpc85xx/traps.c  |    4 ----
>  cpu/mpc86xx/traps.c  |    4 ----
>  cpu/mpc8xx/traps.c   |    4 ----
>  cpu/ppc4xx/traps.c   |    4 ----
>  9 files changed, 0 insertions(+), 36 deletions(-)

Applied, thanks.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
        Ordnung ist die Lust der Vernunft,
        aber Unordnung die Wonne der Phantasie         - Paul Claudel

[U-Boot] [PATCH 3/5] kgdb: update mem2hex/hex2mem funcs

[Mike Frysinger]

From: Robin Getz <robin.getz@analog.com>

Convert the funcs to do the conversion inline so that we can do the copy
all at once with memcpy.  This let's us push out an weird arch-specific
issues with accessing different regions of memory to the memcpy function
like the MMRs on Blackfin systems, and it should be a bit faster.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 common/kgdb.c |   43 ++++++++++++++++++++++++++++++++-----------
 1 files changed, 32 insertions(+), 11 deletions(-)

diff --git a/common/kgdb.c b/common/kgdb.c
index 862f368..0531452 100644
--- a/common/kgdb.c
+++ b/common/kgdb.c
@@ -132,11 +132,20 @@ hex(unsigned char ch)
 static unsigned char *
 mem2hex(char *mem, char *buf, int count)
 {
+	char *tmp;
 	unsigned char ch;
 
+	/*
+	 * We use the upper half of buf as an intermediate buffer for the
+	 * raw memory copy.  Hex conversion will work against this one.
+	 */
+	tmp = buf + count;
 	longjmp_on_fault = 1;
+
+	memcpy(tmp, mem, count);
+
 	while (count-- > 0) {
-		ch = *mem++;
+		ch = *tmp++;
 		*buf++ = hexchars[ch >> 4];
 		*buf++ = hexchars[ch & 0xf];
 	}
@@ -151,21 +160,33 @@ mem2hex(char *mem, char *buf, int count)
 static char *
 hex2mem(char *buf, char *mem, int count)
 {
-	int i, hexValue;
-	unsigned char ch;
-	char *mem_start = mem;
+	int hexValue;
+	char *tmp_raw, *tmp_hex;
+
+	/*
+	 * We use the upper half of buf as an intermediate buffer for the
+	 * raw memory that is converted from hex.
+	 */
+	tmp_raw = buf + count * 2;
+	tmp_hex = tmp_raw - 1;
 
 	longjmp_on_fault = 1;
-	for (i=0; i<count; i++) {
-		if ((hexValue = hex(*buf++)) < 0)
+	while (tmp_hex >= buf) {
+		tmp_raw--;
+		hexValue = hex(*tmp_hex--);
+		if (hexValue < 0)
 			kgdb_error(KGDBERR_NOTHEXDIG);
-		ch = hexValue << 4;
-		if ((hexValue = hex(*buf++)) < 0)
+		*tmp_raw = hexValue;
+		hexValue = hex(*tmp_hex--);
+		if (hexValue < 0)
 			kgdb_error(KGDBERR_NOTHEXDIG);
-		ch |= hexValue;
-		*mem++ = ch;
+		*tmp_raw |= hexValue << 4;
+
 	}
-	kgdb_flush_cache_range((void *)mem_start, (void *)(mem - 1));
+
+	memcpy(mem, tmp_raw, count);
+
+	kgdb_flush_cache_range((void *)mem, (void *)(mem+count));
 	longjmp_on_fault = 0;
 
 	return buf;
-- 
1.6.5.4

[U-Boot] [PATCH 3/5] kgdb: update mem2hex/hex2mem funcs

[Wolfgang Denk]

Dear Mike Frysinger,

In message <1261438846-9675-4-git-send-email-vapier@gentoo.org> you wrote:
> From: Robin Getz <robin.getz@analog.com>
> 
> Convert the funcs to do the conversion inline so that we can do the copy
> all at once with memcpy.  This let's us push out an weird arch-specific
> issues with accessing different regions of memory to the memcpy function
> like the MMRs on Blackfin systems, and it should be a bit faster.
> 
> Signed-off-by: Robin Getz <robin.getz@analog.com>
> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
> ---
>  common/kgdb.c |   43 ++++++++++++++++++++++++++++++++-----------
>  1 files changed, 32 insertions(+), 11 deletions(-)

Applied, thanks.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Be kind to unkind people - they need it the most.

[U-Boot] U-Boot for LENO3 processor board

[K Balaji]

Dear All,

Greetings!

I am having the following boot requirements:

Boot software will be flashed in to PROM, which should start from PROM and copy the application software which is flahsed in other flash device in different address space. The processor is LEON3FT.

is current release of U-Boot supports LEON3FT architecture, please provide with details and link to get start

 Regards,
Balaji 


      

[U-Boot] U-Boot for LENO3 processor board

[Detlev Zundel]

Hi Balaji,

> I am having the following boot requirements:
>
> Boot software will be flashed in to PROM, which should start from PROM
> and copy the application software which is flahsed in other flash
> device in different address space. The processor is LEON3FT.
>
> is current release of U-Boot supports LEON3FT architecture, please
> provide with details and link to get start

Actually I don't know much about the Leon line of CPUs, but I see that
we have three configurations using a Leon CPU: gr_cpci_ax2000,
gr_ep2s60, grsim and gr_xc3s_1500.  I put the maintainer of these boards
on CC, so maybe he can answer that.

Cheers
  Detlev

-- 
Indeed, the author firmly believes that the best serious work is also
good fun.   We needn't apologize if we enjoy doing research.
                                        -- Donald Knuth
--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de

[U-Boot] U-Boot for LENO3 processor board

[Daniel Hellstrom]

Hi,


Detlev Zundel wrote:

>Hi Balaji,
>
>  
>
>>I am having the following boot requirements:
>>
>>Boot software will be flashed in to PROM, which should start from PROM
>>and copy the application software which is flahsed in other flash
>>device in different address space. The processor is LEON3FT.
>>
>>is current release of U-Boot supports LEON3FT architecture, please
>>provide with details and link to get start
>>    
>>
>
>Actually I don't know much about the Leon line of CPUs, but I see that
>we have three configurations using a Leon CPU: gr_cpci_ax2000,
>gr_ep2s60, grsim and gr_xc3s_1500.  I put the maintainer of these boards
>on CC, so maybe he can answer that.
>
>Cheers
>  Detlev
>  
>
As Detlev points out there are three BSPs available. Since the LEON3 is 
a SOC it is hard to support all different configurations on a board, so 
the boards supported are though to support the template design of GRLIB.

The LEON3FT is not supported in the current u-boot available in the 
sparc git repository at denx.de. Some extra steps must be taken when 
running the fault-tolerant LEON3, one must clear memory and registered 
for example so that the CRCs of the registers are correct.

I have a version that supports LEON3FT available at 
ftp://ftp.gaisler.com/u-boot/u-boot-sparc-vxworks-1.0.0.tar.gz, 
currently I'm working with generating patches for the LEON3 CPU/boards, 
I have reworked some parts of the current LEON port. I suggest you wait 
one day or so until I push the patches onto the SPARC-u-boot git repo, 
after that I will also add the LEON3FT patches. In the meanwhile you can 
try the FTP link.

Regards,
Daniel

[U-Boot] U-Boot for LENO3 processor board

[K Balaji]

Thanks Daniel,

it will be veryhelpful for me to start exploring. pleas do let me know once you have updated for LEON3FT.


have nice weekend.
 
Regards,
Balaji KUPPUSAMY,  PMP?




----- Original Message ----
From: Daniel Hellstrom <daniel@gaisler.com>
To: K Balaji <krb_balaji@yahoo.com>
Cc: u-boot at lists.denx.de
Sent: Thu, January 21, 2010 3:02:22 PM
Subject: Re: [U-Boot] U-Boot for LENO3 processor board

Hi,


Detlev Zundel wrote:

> Hi Balaji,
> 
>  
>> I am having the following boot requirements:
>> 
>> Boot software will be flashed in to PROM, which should start from PROM
>> and copy the application software which is flahsed in other flash
>> device in different address space. The processor is LEON3FT.
>> 
>> is current release of U-Boot supports LEON3FT architecture, please
>> provide with details and link to get start
>>    
> 
> Actually I don't know much about the Leon line of CPUs, but I see that
> we have three configurations using a Leon CPU: gr_cpci_ax2000,
> gr_ep2s60, grsim and gr_xc3s_1500.  I put the maintainer of these boards
> on CC, so maybe he can answer that.
> 
> Cheers
>  Detlev
>  
As Detlev points out there are three BSPs available. Since the LEON3 is a SOC it is hard to support all different configurations on a board, so the boards supported are though to support the template design of GRLIB.

The LEON3FT is not supported in the current u-boot available in the sparc git repository at denx.de. Some extra steps must be taken when running the fault-tolerant LEON3, one must clear memory and registered for example so that the CRCs of the registers are correct.

I have a version that supports LEON3FT available at ftp://ftp.gaisler.com/u-boot/u-boot-sparc-vxworks-1.0.0.tar.gz, currently I'm working with generating patches for the LEON3 CPU/boards, I have reworked some parts of the current LEON port. I suggest you wait one day or so until I push the patches onto the SPARC-u-boot git repo, after that I will also add the LEON3FT patches. In the meanwhile you can try the FTP link.

Regards,
Daniel



      

[U-Boot] U-Boot for LENO3 processor board

[Daniel Hellstrom]

Hi,


Detlev Zundel wrote:

>Hi Balaji,
>
>  
>
>>I am having the following boot requirements:
>>
>>Boot software will be flashed in to PROM, which should start from PROM
>>and copy the application software which is flahsed in other flash
>>device in different address space. The processor is LEON3FT.
>>
>>is current release of U-Boot supports LEON3FT architecture, please
>>provide with details and link to get start
>>    
>>
>
>Actually I don't know much about the Leon line of CPUs, but I see that
>we have three configurations using a Leon CPU: gr_cpci_ax2000,
>gr_ep2s60, grsim and gr_xc3s_1500.  I put the maintainer of these boards
>on CC, so maybe he can answer that.
>
>Cheers
>  Detlev
>  
>
Thank you for CC:ing me Detlev.


As Detlev points out there are three BSPs available. Since the LEON3 is 
a SOC it is hard to support all different configurations on a board, so 
the BSPs intention is to support the template design of GRLIB.

The LEON3FT is not supported in the current u-boot available in the 
sparc git repository at denx.de. Some extra steps must be taken when 
running the fault-tolerant LEON3, one must clear memory and registered 
for example so that the CRCs of the registers are correct.

I have a version that supports LEON3FT available at 
ftp://ftp.gaisler.com/u-boot/u-boot-sparc-vxworks-1.0.0.tar.gz, 
currently I'm working with generating patches for the LEON3 CPU/boards, 
I have reworked some parts of the current LEON port. I suggest you wait 
one day or so until I push the patches onto the SPARC-u-boot git repo, 
after that I will also add the LEON3FT patches. In the meanwhile you can 
try the FTP link.

Regards,
Daniel

[U-Boot] U-Boot for LENO3 processor board

[K Balaji]

Hallo Detlev,

thanks for prompt reply and the input. 

Regards,
Balaji KUPPUSAMY,  PMP?




----- Original Message ----
From: Detlev Zundel <dzu@denx.de>
To: K Balaji <krb_balaji@yahoo.com>
Cc: u-boot at lists.denx.de; Daniel Hellstrom <daniel@gaisler.com>
Sent: Thu, January 21, 2010 2:14:52 PM
Subject: Re: [U-Boot] U-Boot for LENO3 processor board

Hi Balaji,

> I am having the following boot requirements:
>
> Boot software will be flashed in to PROM, which should start from PROM
> and copy the application software which is flahsed in other flash
> device in different address space. The processor is LEON3FT.
>
> is current release of U-Boot supports LEON3FT architecture, please
> provide with details and link to get start

Actually I don't know much about the Leon line of CPUs, but I see that
we have three configurations using a Leon CPU: gr_cpci_ax2000,
gr_ep2s60, grsim and gr_xc3s_1500.  I put the maintainer of these boards
on CC, so maybe he can answer that.

Cheers
  Detlev

-- 
Indeed, the author firmly believes that the best serious work is also
good fun.   We needn't apologize if we enjoy doing research.
                                        -- Donald Knuth
--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de



      

[U-Boot] [PATCH 4/5] asm-generic/signal.h: import from linux

[Mike Frysinger]

From: Robin Getz <robin.getz@analog.com>

We need signal.h for Blackfin/KGDB, so import the asm-generic/signal.h
for people to leverage.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 include/asm-generic/signal.h |  101 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 101 insertions(+), 0 deletions(-)
 create mode 100644 include/asm-generic/signal.h

diff --git a/include/asm-generic/signal.h b/include/asm-generic/signal.h
new file mode 100644
index 0000000..af93947
--- /dev/null
+++ b/include/asm-generic/signal.h
@@ -0,0 +1,101 @@
+#ifndef __ASM_GENERIC_SIGNAL_H
+#define __ASM_GENERIC_SIGNAL_H
+
+#include <linux/types.h>
+
+#define _NSIG		64
+#define _NSIG_BPW	BITS_PER_LONG
+#define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
+
+#define SIGHUP		 1
+#define SIGINT		 2
+#define SIGQUIT		 3
+#define SIGILL		 4
+#define SIGTRAP		 5
+#define SIGABRT		 6
+#define SIGIOT		 6
+#define SIGBUS		 7
+#define SIGFPE		 8
+#define SIGKILL		 9
+#define SIGUSR1		10
+#define SIGSEGV		11
+#define SIGUSR2		12
+#define SIGPIPE		13
+#define SIGALRM		14
+#define SIGTERM		15
+#define SIGSTKFLT	16
+#define SIGCHLD		17
+#define SIGCONT		18
+#define SIGSTOP		19
+#define SIGTSTP		20
+#define SIGTTIN		21
+#define SIGTTOU		22
+#define SIGURG		23
+#define SIGXCPU		24
+#define SIGXFSZ		25
+#define SIGVTALRM	26
+#define SIGPROF		27
+#define SIGWINCH	28
+#define SIGIO		29
+#define SIGPOLL		SIGIO
+/*
+#define SIGLOST		29
+*/
+#define SIGPWR		30
+#define SIGSYS		31
+#define	SIGUNUSED	31
+
+/* These should not be considered constants from userland.  */
+#define SIGRTMIN	32
+#ifndef SIGRTMAX
+#define SIGRTMAX	_NSIG
+#endif
+
+/*
+ * SA_FLAGS values:
+ *
+ * SA_ONSTACK indicates that a registered stack_t will be used.
+ * SA_RESTART flag to get restarting signals (which were the default long ago)
+ * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
+ * SA_RESETHAND clears the handler when the signal is delivered.
+ * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
+ * SA_NODEFER prevents the current signal from being masked in the handler.
+ *
+ * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
+ * Unix names RESETHAND and NODEFER respectively.
+ */
+#define SA_NOCLDSTOP	0x00000001
+#define SA_NOCLDWAIT	0x00000002
+#define SA_SIGINFO	0x00000004
+#define SA_ONSTACK	0x08000000
+#define SA_RESTART	0x10000000
+#define SA_NODEFER	0x40000000
+#define SA_RESETHAND	0x80000000
+
+#define SA_NOMASK	SA_NODEFER
+#define SA_ONESHOT	SA_RESETHAND
+
+/*
+ * New architectures should not define the obsolete
+ *	SA_RESTORER	0x04000000
+ */
+
+/*
+ * sigaltstack controls
+ */
+#define SS_ONSTACK	1
+#define SS_DISABLE	2
+
+#define MINSIGSTKSZ	2048
+#define SIGSTKSZ	8192
+
+#ifndef __ASSEMBLY__
+typedef struct {
+	unsigned long sig[_NSIG_WORDS];
+} sigset_t;
+
+/* not actually used, but required for linux/syscalls.h */
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_GENERIC_SIGNAL_H */
-- 
1.6.5.4

[U-Boot] [PATCH 5/5] Blackfin: add support for kgdb

[Mike Frysinger]

From: Robin Getz <robin.getz@analog.com>

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 cpu/blackfin/interrupt.S                     |  105 +++++++
 cpu/blackfin/traps.c                         |   57 ++++-
 include/asm-blackfin/config.h                |    7 +
 include/asm-blackfin/deferred.h              |   20 ++
 include/asm-blackfin/entry.h                 |   10 +
 include/asm-blackfin/mach-common/bits/core.h |    3 +
 include/asm-blackfin/signal.h                |    1 +
 include/configs/bfin_adi_common.h            |    1 +
 lib_blackfin/Makefile                        |    2 +
 lib_blackfin/__kgdb.S                        |  155 ++++++++++
 lib_blackfin/board.c                         |    6 +
 lib_blackfin/kgdb.c                          |  423 ++++++++++++++++++++++++++
 lib_blackfin/kgdb.h                          |  160 ++++++++++
 lib_blackfin/string.c                        |   44 +++-
 14 files changed, 982 insertions(+), 12 deletions(-)
 create mode 100644 include/asm-blackfin/deferred.h
 create mode 100644 include/asm-blackfin/signal.h
 create mode 100644 lib_blackfin/__kgdb.S
 create mode 100644 lib_blackfin/kgdb.c
 create mode 100644 lib_blackfin/kgdb.h

diff --git a/cpu/blackfin/interrupt.S b/cpu/blackfin/interrupt.S
index 8c7a262..69bba3f 100644
--- a/cpu/blackfin/interrupt.S
+++ b/cpu/blackfin/interrupt.S
@@ -8,6 +8,9 @@
 #include <config.h>
 #include <asm/blackfin.h>
 #include <asm/entry.h>
+#include <asm/ptrace.h>
+#include <asm/deferred.h>
+#include <asm/mach-common/bits/core.h>
 
 .text
 
@@ -19,10 +22,75 @@ ENTRY(_trap)
 	SAVE_ALL_SYS
 
 	r0 = sp;	/* stack frame pt_regs pointer argument ==> r0 */
+	r1 = 3;		/* EVT3 space */
 	sp += -12;
 	call _trap_c;
 	sp += 12;
 
+#ifdef CONFIG_EXCEPTION_DEFER
+	CC = R0 == 0;
+	IF CC JUMP .Lexit_trap;
+
+	/* To avoid double faults, lower our priority to IRQ5 */
+	p4.l = lo(COREMMR_BASE);
+	p4.h = hi(COREMMR_BASE);
+
+	r7.h = _exception_to_level5;
+	r7.l = _exception_to_level5;
+	[p4 + (EVT5 - COREMMR_BASE)] = r7;
+
+	/*
+	 * Save these registers, as they are only valid in exception context
+	 *  (where we are now - as soon as we defer to IRQ5, they can change)
+	 */
+	p5.l = _deferred_regs;
+	p5.h = _deferred_regs;
+	r6 = [p4 + (DCPLB_FAULT_ADDR - COREMMR_BASE)];
+	[p5 + (deferred_regs_DCPLB_FAULT_ADDR * 4)] = r6;
+
+	r6 = [p4 + (ICPLB_FAULT_ADDR - COREMMR_BASE)];
+	[p5 + (deferred_regs_ICPLB_FAULT_ADDR * 4)] = r6;
+
+	/* Save the state of single stepping */
+	r6 = SYSCFG;
+	[p5 + (deferred_regs_SYSCFG * 4)] = r6;
+	/* Clear it while we handle the exception in IRQ5 mode
+	 * RESTORE_ALL_SYS will load it, so all we need to do is store it
+	 * in the right place
+	 */
+	BITCLR(r6, SYSCFG_SSSTEP_P);
+	[SP + PT_SYSCFG] = r6;
+
+	/* Since we are going to clobber RETX, we need to save it */
+	r6 = retx;
+	[p5 + (deferred_regs_retx * 4)] = r6;
+
+	/* Save the current IMASK, since we change in order to jump to level 5 */
+	cli r6;
+	[p5 + (deferred_regs_IMASK * 4)] = r6;
+
+	/* Disable all interrupts, but make sure level 5 is enabled so
+	 * we can switch to that level.
+	 */
+	r6 = 0x3f;
+	sti r6;
+
+	/* Clobber RETX so we don't end up back at a faulting instruction */
+	[sp + PT_RETX] = r7;
+
+	/* In case interrupts are disabled IPEND[4] (global interrupt disable bit)
+	 * clear it (re-enabling interrupts again) by the special sequence of pushing
+	 * RETI onto the stack.  This way we can lower ourselves to IVG5 even if the
+	 * exception was taken after the interrupt handler was called but before it
+	 * got a chance to enable global interrupts itself.
+	 */
+	[--sp] = reti;
+	sp += 4;
+
+	RAISE 5;
+.Lexit_trap:
+#endif
+
 #if ANOMALY_05000257
 	R7  = LC0;
 	LC0 = R7;
@@ -35,6 +103,43 @@ ENTRY(_trap)
 	rtx;
 ENDPROC(_trap)
 
+#ifdef CONFIG_EXCEPTION_DEFER
+/* Deferred (IRQ5) exceptions */
+ENTRY(_exception_to_level5)
+	SAVE_ALL_SYS
+
+	/* Now we have to fix things up */
+	p4.l = lo(EVT5);
+	p4.h = hi(EVT5);
+	r0.l = _evt_default;
+	r0.h = _evt_default;
+	[p4] = r0;
+	csync;
+
+	p4.l = _deferred_regs;
+	p4.h = _deferred_regs;
+	r0 = [p4 + (deferred_regs_retx * 4)];
+	[sp + PT_PC] = r0;
+
+	r0 = [p4 + (deferred_regs_SYSCFG * 4)];
+	[sp + PT_SYSCFG] = r0;
+
+	r0 = sp;	/* stack frame pt_regs pointer argument ==> r0 */
+	r1 = 5;	/* EVT5 space */
+	sp += -12;
+	call _trap_c;
+	sp += 12;
+
+	/* Restore IMASK */
+	r0 = [p4 + (deferred_regs_IMASK * 4)];
+	sti r0;
+
+	RESTORE_ALL_SYS
+
+	rti;
+ENDPROC(_exception_to_level5)
+#endif
+
 /* default entry point for interrupts */
 ENTRY(_evt_default)
 	SAVE_ALL_SYS
diff --git a/cpu/blackfin/traps.c b/cpu/blackfin/traps.c
index becc36e..caaea94 100644
--- a/cpu/blackfin/traps.c
+++ b/cpu/blackfin/traps.c
@@ -18,6 +18,7 @@
  */
 
 #include <common.h>
+#include <kgdb.h>
 #include <linux/types.h>
 #include <asm/traps.h>
 #include <asm/cplb.h>
@@ -25,6 +26,7 @@
 #include <asm/mach-common/bits/core.h>
 #include <asm/mach-common/bits/mpu.h>
 #include <asm/mach-common/bits/trace.h>
+#include <asm/deferred.h>
 #include "cpu.h"
 
 #define trace_buffer_save(x) \
@@ -69,8 +71,16 @@ const struct memory_map const bfin_memory_map[] = {
 	}
 };
 
-void trap_c(struct pt_regs *regs)
+#ifdef CONFIG_EXCEPTION_DEFER
+unsigned int deferred_regs[deferred_regs_last];
+#endif
+
+/*
+ * Handle all exceptions while running in EVT3 or EVT5
+ */
+int trap_c(struct pt_regs *regs, uint32_t level)
 {
+	uint32_t ret = 0;
 	uint32_t trapnr = (regs->seqstat & EXCAUSE);
 	bool data = false;
 
@@ -87,7 +97,7 @@ void trap_c(struct pt_regs *regs)
 			 */
 			if (last_cplb_fault_retx != regs->retx) {
 				last_cplb_fault_retx = regs->retx;
-				return;
+				return ret;
 			}
 		}
 
@@ -102,6 +112,12 @@ void trap_c(struct pt_regs *regs)
 		size_t i;
 		unsigned long tflags;
 
+#ifdef CONFIG_EXCEPTION_DEFER
+		/* This should never happen */
+		if (level == 5)
+			bfin_panic(regs);
+#endif
+
 		/*
 		 * Keep the trace buffer so that a miss here points people
 		 * to the right place (their code).  Crashes here rarely
@@ -167,11 +183,40 @@ void trap_c(struct pt_regs *regs)
 		trace_buffer_restore(tflags);
 		break;
 	}
-
+#ifdef CONFIG_CMD_KGDB
+	/* Single step
+	 * if we are in IRQ5, just ignore, otherwise defer, and handle it in kgdb
+	 */
+	case VEC_STEP:
+		if (level == 3) {
+			/* If we just returned from an interrupt, the single step
+			 * event is for the RTI instruction.
+			 */
+			if (regs->retx == regs->pc)
+				break;
+			/* we just return if we are single stepping through IRQ5 */
+			if (regs->ipend & 0x20)
+				break;
+			/* Otherwise, turn single stepping off & fall through,
+			 * which defers to IRQ5
+			 */
+			regs->syscfg &= ~1;
+		}
+		/* fall through */
+#endif
 	default:
-		/* All traps come here */
+#ifdef CONFIG_CMD_KGDB
+		if (level == 3) {
+			/* We need to handle this at EVT5, so try again */
+			ret = 1;
+			break;
+		}
+		if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+			return 0;
+#endif
 		bfin_panic(regs);
 	}
+	return ret;
 }
 
 #ifdef CONFIG_DEBUG_DUMP
@@ -251,8 +296,10 @@ void dump(struct pt_regs *fp)
 	if (!ENABLE_DUMP)
 		return;
 
-	/* fp->ipend is garbage, so load it ourself */
+#ifndef CONFIG_CMD_KGDB
+	/* fp->ipend is normally garbage, so load it ourself */
 	fp->ipend = bfin_read_IPEND();
+#endif
 
 	hwerrcause = (fp->seqstat & HWERRCAUSE) >> HWERRCAUSE_P;
 	excause = (fp->seqstat & EXCAUSE) >> EXCAUSE_P;
diff --git a/include/asm-blackfin/config.h b/include/asm-blackfin/config.h
index 0ae838a..7455685 100644
--- a/include/asm-blackfin/config.h
+++ b/include/asm-blackfin/config.h
@@ -66,6 +66,11 @@
 # error CONFIG_PLL_BYPASS: Invalid value: must be 0 or 1
 #endif
 
+/* If we are using KGDB, make sure we defer exceptions */
+#ifdef CONFIG_CMD_KGDB
+# define CONFIG_EXCEPTION_DEFER	1
+#endif
+
 /* Using L1 scratch pad makes sense for everyone by default. */
 #ifndef CONFIG_LINUX_CMDLINE_ADDR
 # define CONFIG_LINUX_CMDLINE_ADDR L1_SRAM_SCRATCH
@@ -138,6 +143,8 @@
 #endif
 #ifndef CONFIG_SYS_CBSIZE
 # define CONFIG_SYS_CBSIZE 1024
+#elif defined(CONFIG_CMD_KGDB) && CONFIG_SYS_CBSIZE < 1024
+# error "kgdb needs cbsize to be >= 1024"
 #endif
 #ifndef CONFIG_SYS_BARGSIZE
 # define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE
diff --git a/include/asm-blackfin/deferred.h b/include/asm-blackfin/deferred.h
new file mode 100644
index 0000000..82ceda3
--- /dev/null
+++ b/include/asm-blackfin/deferred.h
@@ -0,0 +1,20 @@
+/*
+ * U-boot - deferred register layout
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _BLACKFIN_DEFER_H
+#define _BLACKFIN_DEFER_H
+
+#define deferred_regs_DCPLB_FAULT_ADDR	0
+#define deferred_regs_ICPLB_FAULT_ADDR	1
+#define deferred_regs_retx		2
+#define deferred_regs_SEQSTAT		3
+#define deferred_regs_SYSCFG		4
+#define deferred_regs_IMASK		5
+#define deferred_regs_last		6
+
+#endif /* _BLACKFIN_DEFER_H */
diff --git a/include/asm-blackfin/entry.h b/include/asm-blackfin/entry.h
index ef74d68..404144f 100644
--- a/include/asm-blackfin/entry.h
+++ b/include/asm-blackfin/entry.h
@@ -86,6 +86,11 @@
 	[--sp] = RETE;
 	[--sp] = SEQSTAT;
 	[--sp] = SYSCFG;
+#ifdef CONFIG_CMD_KGDB
+	p0.l = lo(IPEND)
+	p0.h = hi(IPEND)
+	r0 = [p0];
+#endif
 	[--sp] = r0;	/* Skip IPEND as well. */
 .endm
 
@@ -137,6 +142,11 @@
 	[--sp] = RETE;
 	[--sp] = SEQSTAT;
 	[--sp] = SYSCFG;
+#ifdef CONFIG_CMD_KGDB
+	p0.l = lo(IPEND)
+	p0.h = hi(IPEND)
+	r0 = [p0];
+#endif
 	[--sp] = r0;	/* Skip IPEND as well. */
 .endm
 
diff --git a/include/asm-blackfin/mach-common/bits/core.h b/include/asm-blackfin/mach-common/bits/core.h
index d8cee10..6db4f81 100644
--- a/include/asm-blackfin/mach-common/bits/core.h
+++ b/include/asm-blackfin/mach-common/bits/core.h
@@ -105,5 +105,8 @@
 #define SSSTEP			0x00000001	/* Supervisor Single Step */
 #define CCEN			0x00000002	/* Cycle Counter Enable */
 #define SNEN			0x00000004	/* Self-Nesting Interrupt Enable */
+#define SYSCFG_SSSTEP_P	0
+#define SYSCFG_CCEN_P	1
+#define SYSCFG_SCEN_P	2
 
 #endif
diff --git a/include/asm-blackfin/signal.h b/include/asm-blackfin/signal.h
new file mode 100644
index 0000000..7b1573c
--- /dev/null
+++ b/include/asm-blackfin/signal.h
@@ -0,0 +1 @@
+#include <asm-generic/signal.h>
diff --git a/include/configs/bfin_adi_common.h b/include/configs/bfin_adi_common.h
index 0da7940..91c5666 100644
--- a/include/configs/bfin_adi_common.h
+++ b/include/configs/bfin_adi_common.h
@@ -80,6 +80,7 @@
 # define CONFIG_CMD_CPLBINFO
 # define CONFIG_CMD_ELF
 # define CONFIG_ELF_SIMPLE_LOAD
+# define CONFIG_CMD_KGDB
 # define CONFIG_CMD_REGINFO
 # define CONFIG_CMD_STRINGS
 # if defined(__ADSPBF51x__) || defined(__ADSPBF52x__) || defined(__ADSPBF54x__)
diff --git a/lib_blackfin/Makefile b/lib_blackfin/Makefile
index eebb131..3bdba75 100644
--- a/lib_blackfin/Makefile
+++ b/lib_blackfin/Makefile
@@ -37,12 +37,14 @@ SOBJS-y	+= memcpy.o
 SOBJS-y	+= memmove.o
 SOBJS-y	+= memset.o
 SOBJS-y	+= outs.o
+SOBJS-$(CONFIG_CMD_KGDB) += __kgdb.o
 
 COBJS-y	+= board.o
 COBJS-y	+= boot.o
 COBJS-y	+= cache.o
 COBJS-y	+= clocks.o
 COBJS-$(CONFIG_CMD_CACHE_DUMP) += cmd_cache_dump.o
+COBJS-$(CONFIG_CMD_KGDB) += kgdb.o
 COBJS-y	+= muldi3.o
 COBJS-$(CONFIG_POST) += post.o tests.o
 COBJS-y	+= string.o
diff --git a/lib_blackfin/__kgdb.S b/lib_blackfin/__kgdb.S
new file mode 100644
index 0000000..cba4179
--- /dev/null
+++ b/lib_blackfin/__kgdb.S
@@ -0,0 +1,155 @@
+
+#include <asm/linkage.h>
+
+/* save stack context for non-local goto
+ * int kgdb_setjmp(long *buf)
+ */
+
+ENTRY(_kgdb_setjmp)
+	[--SP] = p0; 	/* Save P0 */
+	p0 = r0;
+	r0 = [SP++];	/* Load P0 into R0 */
+
+	[p0 + 0x00] = r0;       /* GP address registers */
+	[p0 + 0x04] = p1;
+	[p0 + 0x08] = p2;
+	[p0 + 0x0C] = p3;
+	[p0 + 0x10] = p4;
+	[p0 + 0x14] = p5;
+	[p0 + 0x18] = FP;       /* frame pointer */
+	[p0 + 0x1C] = SP;       /* stack pointer */
+
+	[p0 + 0x20] = p0;       /* data regs */
+	[p0 + 0x24] = r1;
+	[p0 + 0x28] = r2;
+	[p0 + 0x2C] = r3;
+	[p0 + 0x30] = r4;
+	[p0 + 0x34] = r5;
+	[p0 + 0x38] = r6;
+	[p0 + 0x3C] = r7;
+
+	r0 = ASTAT;	[p0 + 0x40] = r0;
+
+	/* loop counters */
+	r0 = LC0;	[p0 + 0x44] = r0;
+	r0 = LC1;	[p0 + 0x48] = r0;
+
+	/* Accumulator */
+	r0 = A0.w;	[p0 + 0x4C] = r0;
+	r0.l = A0.x;	[p0 + 0x50] = r0;
+	r0 = A1.w;	[p0 + 0x54] = r0;
+	r0.l = A1.x;	[p0 + 0x58] = r0;
+
+	/* index registers */
+	r0 = i0;	[p0 + 0x5C] = r0;
+	r0 = i1;	[p0 + 0x60] = r0;
+	r0 = i2;	[p0 + 0x64] = r0;
+	r0 = i3;	[p0 + 0x68] = r0;
+
+	/* modifier registers */
+	r0 = m0;	[p0 + 0x6C] = r0;
+	r0 = m1;	[p0 + 0x70] = r0;
+	r0 = m2;	[p0 + 0x74] = r0;
+	r0 = m3;	[p0 + 0x78] = r0;
+
+	/* length registers */
+	r0 = l0;	[p0 + 0x7C] = r0;
+	r0 = l1;	[p0 + 0x80] = r0;
+	r0 = l2;	[p0 + 0x84] = r0;
+	r0 = l3;	[p0 + 0x88] = r0;
+
+	/* base registers */
+	r0 = b0;	[p0 + 0x8C] = r0;
+	r0 = b1;	[p0 + 0x90] = r0;
+	r0 = b2;	[p0 + 0x94] = r0;
+	r0 = b3;	[p0 + 0x98] = r0;
+
+	/* store return address */
+	r0 = RETS;	[p0 + 0x9C] = r0;
+
+	R0 = 0;
+	RTS;
+ENDPROC(_kgdb_setjmp)
+
+/*
+ * non-local jump to a saved stack context
+ * longjmp(long *buf, int val)
+ */
+
+ENTRY(_kgdb_longjmp)
+	p0 = r0;
+	r0 = [p0 + 0x00];
+	[--sp] = r0;
+
+	/* GP address registers - skip p0 for now*/
+	p1 = [p0 + 0x04];
+	p2 = [p0 + 0x08];
+	p3 = [p0 + 0x0C];
+	p4 = [p0 + 0x10];
+	p5 = [p0 + 0x14];
+	/* frame pointer */
+	fp = [p0 + 0x18];
+	/* stack pointer */
+	r0 = [sp++];
+	sp = [p0 + 0x1C];
+	[--sp] = r0;
+	[--sp] = r1;
+
+	/* data regs */
+	r0 = [p0 + 0x20];
+	r1 = [p0 + 0x24];
+	r2 = [p0 + 0x28];
+	r3 = [p0 + 0x2C];
+	r4 = [p0 + 0x30];
+	r5 = [p0 + 0x34];
+	r6 = [p0 + 0x38];
+	r7 = [p0 + 0x3C];
+
+	r0 = [p0 + 0x40];	ASTAT = r0;
+
+	/* loop counters */
+	r0 = [p0 + 0x44];	LC0 = r0;
+	r0 = [p0 + 0x48];	LC1 = r0;
+
+	/* Accumulator */
+	r0 = [p0 + 0x4C];	A0.w = r0;
+	r0 = [p0 + 0x50];	A0.x = r0;
+	r0 = [p0 + 0x54];	A1.w = r0;
+	r0 = [p0 + 0x58];	A1.x = r0;
+
+	/* index registers */
+	r0 = [p0 + 0x5C];	i0 = r0;
+	r0 = [p0 + 0x60];	i1 = r0;
+	r0 = [p0 + 0x64];	i2 = r0;
+	r0 = [p0 + 0x68];	i3 = r0;
+
+	/* modifier registers */
+	r0 = [p0 + 0x6C];	m0 = r0;
+	r0 = [p0 + 0x70];	m1 = r0;
+	r0 = [p0 + 0x74];	m2 = r0;
+	r0 = [p0 + 0x78];	m3 = r0;
+
+	/* length registers */
+	r0 = [p0 + 0x7C];	l0 = r0;
+	r0 = [p0 + 0x80];	l1 = r0;
+	r0 = [p0 + 0x84];	l2 = r0;
+	r0 = [p0 + 0x88];	l3 = r0;
+
+	/* base registers */
+	r0 = [p0 + 0x8C];	b0 = r0;
+	r0 = [p0 + 0x90];	b1 = r0;
+	r0 = [p0 + 0x94];	b2 = r0;
+	r0 = [p0 + 0x98];	b3 = r0;
+
+	/* store return address */
+	r0 = [p0 + 0x9C];	RETS = r0;
+
+	/* fixup R0 & P0 */
+	r0 = [sp++];
+	p0 = [sp++];
+	CC = R0 == 0;
+	IF !CC JUMP .Lfinished;
+	R0 = 1;
+.Lfinished:
+	RTS;
+ENDPROC(_kgdb_longjmp)
diff --git a/lib_blackfin/board.c b/lib_blackfin/board.c
index 90da2b4..21fff33 100644
--- a/lib_blackfin/board.c
+++ b/lib_blackfin/board.c
@@ -22,6 +22,7 @@
 
 #include <asm/cplb.h>
 #include <asm/mach-common/bits/mpu.h>
+#include <kgdb.h>
 
 #ifdef CONFIG_CMD_NAND
 #include <nand.h>	/* cannot even include nand.h if it isnt configured */
@@ -356,6 +357,11 @@ void board_init_r(gd_t * id, ulong dest_addr)
 	/* Initialize the console (after the relocation and devices init) */
 	console_init_r();
 
+#ifdef CONFIG_CMD_KGDB
+	puts("KGDB:  ");
+	kgdb_init();
+#endif
+
 #ifdef CONFIG_STATUS_LED
 	status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
 	status_led_set(STATUS_LED_CRASH, STATUS_LED_OFF);
diff --git a/lib_blackfin/kgdb.c b/lib_blackfin/kgdb.c
new file mode 100644
index 0000000..bd62d71
--- /dev/null
+++ b/lib_blackfin/kgdb.c
@@ -0,0 +1,423 @@
+/*
+ * U-boot - architecture specific kgdb code
+ *
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <command.h>
+
+#include <kgdb.h>
+#include <asm/processor.h>
+#include <asm/mach-common/bits/core.h>
+#include "kgdb.h"
+#include <asm/deferred.h>
+#include <asm/traps.h>
+#include <asm/signal.h>
+
+void kgdb_enter(struct pt_regs *regs, kgdb_data *kdp)
+{
+	/* disable interrupts */
+	disable_interrupts();
+
+	/* reply to host that an exception has occurred */
+	kdp->sigval = kgdb_trap(regs);
+
+	/* send the PC and the Stack Pointer */
+	kdp->nregs = 2;
+	kdp->regs[0].num = BFIN_PC;
+	kdp->regs[0].val = regs->pc;
+
+	kdp->regs[1].num = BFIN_SP;
+	kdp->regs[1].val = (unsigned long)regs;
+
+}
+
+void kgdb_exit(struct pt_regs *regs, kgdb_data *kdp)
+{
+	if (kdp->extype & KGDBEXIT_WITHADDR)
+		printf("KGDBEXIT_WITHADDR\n");
+
+	switch (kdp->extype & KGDBEXIT_TYPEMASK) {
+	case KGDBEXIT_KILL:
+		printf("KGDBEXIT_KILL:\n");
+		break;
+	case KGDBEXIT_CONTINUE:
+		/* Make sure the supervisor single step bit is clear */
+		regs->syscfg &= ~1;
+		break;
+	case KGDBEXIT_SINGLE:
+		/* set the supervisor single step bit */
+		regs->syscfg |= 1;
+		break;
+	default:
+		printf("KGDBEXIT : %d\n", kdp->extype);
+	}
+
+	/* enable interrupts */
+	enable_interrupts();
+}
+
+int kgdb_trap(struct pt_regs *regs)
+{
+	/* ipend doesn't get filled in properly */
+	switch (regs->seqstat & EXCAUSE) {
+	case VEC_EXCPT01:
+		return SIGTRAP;
+	case VEC_EXCPT03:
+		return SIGSEGV;
+	case VEC_EXCPT02:
+		return SIGTRAP;
+	case VEC_EXCPT04 ... VEC_EXCPT15:
+		return SIGILL;
+	case VEC_STEP:
+		return SIGTRAP;
+	case VEC_OVFLOW:
+		return SIGTRAP;
+	case VEC_UNDEF_I:
+		return SIGILL;
+	case VEC_ILGAL_I:
+		return SIGILL;
+	case VEC_CPLB_VL:
+		return SIGSEGV;
+	case VEC_MISALI_D:
+		return SIGBUS;
+	case VEC_UNCOV:
+		return SIGILL;
+	case VEC_CPLB_MHIT:
+		return SIGSEGV;
+	case VEC_MISALI_I:
+		return SIGBUS;
+	case VEC_CPLB_I_VL:
+		return SIGBUS;
+	case VEC_CPLB_I_MHIT:
+		return SIGSEGV;
+	default:
+		return SIGBUS;
+	}
+}
+
+/*
+ * getregs - gets the pt_regs, and gives them to kgdb's buffer
+ */
+int kgdb_getregs(struct pt_regs *regs, char *buf, int max)
+{
+	unsigned long *gdb_regs = (unsigned long *)buf;
+
+	if (max < NUMREGBYTES)
+		kgdb_error(KGDBERR_NOSPACE);
+
+	if ((unsigned long)gdb_regs & 3)
+		kgdb_error(KGDBERR_ALIGNFAULT);
+
+	gdb_regs[BFIN_R0] = regs->r0;
+	gdb_regs[BFIN_R1] = regs->r1;
+	gdb_regs[BFIN_R2] = regs->r2;
+	gdb_regs[BFIN_R3] = regs->r3;
+	gdb_regs[BFIN_R4] = regs->r4;
+	gdb_regs[BFIN_R5] = regs->r5;
+	gdb_regs[BFIN_R6] = regs->r6;
+	gdb_regs[BFIN_R7] = regs->r7;
+	gdb_regs[BFIN_P0] = regs->p0;
+	gdb_regs[BFIN_P1] = regs->p1;
+	gdb_regs[BFIN_P2] = regs->p2;
+	gdb_regs[BFIN_P3] = regs->p3;
+	gdb_regs[BFIN_P4] = regs->p4;
+	gdb_regs[BFIN_P5] = regs->p5;
+	gdb_regs[BFIN_SP] = (unsigned long)regs;
+	gdb_regs[BFIN_FP] = regs->fp;
+	gdb_regs[BFIN_I0] = regs->i0;
+	gdb_regs[BFIN_I1] = regs->i1;
+	gdb_regs[BFIN_I2] = regs->i2;
+	gdb_regs[BFIN_I3] = regs->i3;
+	gdb_regs[BFIN_M0] = regs->m0;
+	gdb_regs[BFIN_M1] = regs->m1;
+	gdb_regs[BFIN_M2] = regs->m2;
+	gdb_regs[BFIN_M3] = regs->m3;
+	gdb_regs[BFIN_B0] = regs->b0;
+	gdb_regs[BFIN_B1] = regs->b1;
+	gdb_regs[BFIN_B2] = regs->b2;
+	gdb_regs[BFIN_B3] = regs->b3;
+	gdb_regs[BFIN_L0] = regs->l0;
+	gdb_regs[BFIN_L1] = regs->l1;
+	gdb_regs[BFIN_L2] = regs->l2;
+	gdb_regs[BFIN_L3] = regs->l3;
+	gdb_regs[BFIN_A0_DOT_X] = regs->a0x;
+	gdb_regs[BFIN_A0_DOT_W] = regs->a0w;
+	gdb_regs[BFIN_A1_DOT_X] = regs->a1x;
+	gdb_regs[BFIN_A1_DOT_W] = regs->a1w;
+	gdb_regs[BFIN_ASTAT] = regs->astat;
+	gdb_regs[BFIN_RETS] = regs->rets;
+	gdb_regs[BFIN_LC0] = regs->lc0;
+	gdb_regs[BFIN_LT0] = regs->lt0;
+	gdb_regs[BFIN_LB0] = regs->lb0;
+	gdb_regs[BFIN_LC1] = regs->lc1;
+	gdb_regs[BFIN_LT1] = regs->lt1;
+	gdb_regs[BFIN_LB1] = regs->lb1;
+	gdb_regs[BFIN_CYCLES] = 0;
+	gdb_regs[BFIN_CYCLES2] = 0;
+	gdb_regs[BFIN_USP] = regs->usp;
+	gdb_regs[BFIN_SEQSTAT] = regs->seqstat;
+	gdb_regs[BFIN_SYSCFG] = regs->syscfg;
+	gdb_regs[BFIN_RETI] = regs->pc;
+	gdb_regs[BFIN_RETX] = regs->retx;
+	gdb_regs[BFIN_RETN] = regs->retn;
+	gdb_regs[BFIN_RETE] = regs->rete;
+	gdb_regs[BFIN_PC] = regs->pc;
+	gdb_regs[BFIN_CC] = 0;
+	gdb_regs[BFIN_EXTRA1] = 0;
+	gdb_regs[BFIN_EXTRA2] = 0;
+	gdb_regs[BFIN_EXTRA3] = 0;
+	gdb_regs[BFIN_IPEND] = regs->ipend;
+
+	return NUMREGBYTES;
+}
+
+/*
+ * putreg - put kgdb's reg (regno) into the pt_regs
+ */
+void kgdb_putreg(struct pt_regs *regs, int regno, char *buf, int length)
+{
+	unsigned long *ptr = (unsigned long *)buf;
+
+	if (regno < 0 || regno > BFIN_NUM_REGS)
+		kgdb_error(KGDBERR_BADPARAMS);
+
+	if (length < 4)
+		kgdb_error(KGDBERR_NOSPACE);
+
+	if ((unsigned long)ptr & 3)
+		kgdb_error(KGDBERR_ALIGNFAULT);
+
+	switch (regno) {
+	case BFIN_R0:
+		regs->r0 = *ptr;
+		break;
+	case BFIN_R1:
+		regs->r1 = *ptr;
+		break;
+	case BFIN_R2:
+		regs->r2 = *ptr;
+		break;
+	case BFIN_R3:
+		regs->r3 = *ptr;
+		break;
+	case BFIN_R4:
+		regs->r4 = *ptr;
+		break;
+	case BFIN_R5:
+		regs->r5 = *ptr;
+		break;
+	case BFIN_R6:
+		regs->r6 = *ptr;
+		break;
+	case BFIN_R7:
+		regs->r7 = *ptr;
+		break;
+	case BFIN_P0:
+		regs->p0 = *ptr;
+		break;
+	case BFIN_P1:
+		regs->p1 = *ptr;
+		break;
+	case BFIN_P2:
+		regs->p2 = *ptr;
+		break;
+	case BFIN_P3:
+		regs->p3 = *ptr;
+		break;
+	case BFIN_P4:
+		regs->p4 = *ptr;
+		break;
+	case BFIN_P5:
+		regs->p5 = *ptr;
+		break;
+	case BFIN_SP:
+		regs->reserved = *ptr;
+		break;
+	case BFIN_FP:
+		regs->fp = *ptr;
+		break;
+	case BFIN_I0:
+		regs->i0 = *ptr;
+		break;
+	case BFIN_I1:
+		regs->i1 = *ptr;
+		break;
+	case BFIN_I2:
+		regs->i2 = *ptr;
+		break;
+	case BFIN_I3:
+		regs->i3 = *ptr;
+		break;
+	case BFIN_M0:
+		regs->m0 = *ptr;
+		break;
+	case BFIN_M1:
+		regs->m1 = *ptr;
+		break;
+	case BFIN_M2:
+		regs->m2 = *ptr;
+		break;
+	case BFIN_M3:
+		regs->m3 = *ptr;
+		break;
+	case BFIN_B0:
+		regs->b0 = *ptr;
+		break;
+	case BFIN_B1:
+		regs->b1 = *ptr;
+		break;
+	case BFIN_B2:
+		regs->b2 = *ptr;
+		break;
+	case BFIN_B3:
+		regs->b3 = *ptr;
+		break;
+	case BFIN_L0:
+		regs->l0 = *ptr;
+		break;
+	case BFIN_L1:
+		regs->l1 = *ptr;
+		break;
+	case BFIN_L2:
+		regs->l2 = *ptr;
+		break;
+	case BFIN_L3:
+		regs->l3 = *ptr;
+		break;
+	case BFIN_A0_DOT_X:
+		regs->a0x = *ptr;
+		break;
+	case BFIN_A0_DOT_W:
+		regs->a0w = *ptr;
+		break;
+	case BFIN_A1_DOT_X:
+		regs->a1x = *ptr;
+		break;
+	case BFIN_A1_DOT_W:
+		regs->a1w = *ptr;
+		break;
+	case BFIN_ASTAT:
+		regs->astat = *ptr;
+		break;
+	case BFIN_RETS:
+		regs->rets = *ptr;
+		break;
+	case BFIN_LC0:
+		regs->lc0 = *ptr;
+		break;
+	case BFIN_LT0:
+		regs->lt0 = *ptr;
+		break;
+	case BFIN_LB0:
+		regs->lb0 = *ptr;
+		break;
+	case BFIN_LC1:
+		regs->lc1 = *ptr;
+		break;
+	case BFIN_LT1:
+		regs->lt1 = *ptr;
+		break;
+	case BFIN_LB1:
+		regs->lb1 = *ptr;
+		break;
+/*
+  BFIN_CYCLES,
+  BFIN_CYCLES2,
+  BFIN_USP,
+  BFIN_SEQSTAT,
+  BFIN_SYSCFG,
+*/
+	case BFIN_RETX:
+		regs->retx = *ptr;
+		break;
+	case BFIN_RETN:
+		regs->retn = *ptr;
+		break;
+	case BFIN_RETE:
+		regs->rete = *ptr;
+		break;
+	case BFIN_PC:
+		regs->pc = *ptr;
+		break;
+
+	default:
+		kgdb_error(KGDBERR_BADPARAMS);
+	}
+}
+
+void kgdb_putregs(struct pt_regs *regs, char *buf, int length)
+{
+	unsigned long *gdb_regs = (unsigned long *)buf;
+
+	if (length != BFIN_NUM_REGS)
+		kgdb_error(KGDBERR_NOSPACE);
+
+	if ((unsigned long)gdb_regs & 3)
+		kgdb_error(KGDBERR_ALIGNFAULT);
+
+	regs->r0 = gdb_regs[BFIN_R0];
+	regs->r1 = gdb_regs[BFIN_R1];
+	regs->r2 = gdb_regs[BFIN_R2];
+	regs->r3 = gdb_regs[BFIN_R3];
+	regs->r4 = gdb_regs[BFIN_R4];
+	regs->r5 = gdb_regs[BFIN_R5];
+	regs->r6 = gdb_regs[BFIN_R6];
+	regs->r7 = gdb_regs[BFIN_R7];
+	regs->p0 = gdb_regs[BFIN_P0];
+	regs->p1 = gdb_regs[BFIN_P1];
+	regs->p2 = gdb_regs[BFIN_P2];
+	regs->p3 = gdb_regs[BFIN_P3];
+	regs->p4 = gdb_regs[BFIN_P4];
+	regs->p5 = gdb_regs[BFIN_P5];
+	regs->fp = gdb_regs[BFIN_FP];
+/*	regs->sp = gdb_regs[BFIN_ ]; */
+	regs->i0 = gdb_regs[BFIN_I0];
+	regs->i1 = gdb_regs[BFIN_I1];
+	regs->i2 = gdb_regs[BFIN_I2];
+	regs->i3 = gdb_regs[BFIN_I3];
+	regs->m0 = gdb_regs[BFIN_M0];
+	regs->m1 = gdb_regs[BFIN_M1];
+	regs->m2 = gdb_regs[BFIN_M2];
+	regs->m3 = gdb_regs[BFIN_M3];
+	regs->b0 = gdb_regs[BFIN_B0];
+	regs->b1 = gdb_regs[BFIN_B1];
+	regs->b2 = gdb_regs[BFIN_B2];
+	regs->b3 = gdb_regs[BFIN_B3];
+	regs->l0 = gdb_regs[BFIN_L0];
+	regs->l1 = gdb_regs[BFIN_L1];
+	regs->l2 = gdb_regs[BFIN_L2];
+	regs->l3 = gdb_regs[BFIN_L3];
+	regs->a0x = gdb_regs[BFIN_A0_DOT_X];
+	regs->a0w = gdb_regs[BFIN_A0_DOT_W];
+	regs->a1x = gdb_regs[BFIN_A1_DOT_X];
+	regs->a1w = gdb_regs[BFIN_A1_DOT_W];
+	regs->rets = gdb_regs[BFIN_RETS];
+	regs->lc0 = gdb_regs[BFIN_LC0];
+	regs->lt0 = gdb_regs[BFIN_LT0];
+	regs->lb0 = gdb_regs[BFIN_LB0];
+	regs->lc1 = gdb_regs[BFIN_LC1];
+	regs->lt1 = gdb_regs[BFIN_LT1];
+	regs->lb1 = gdb_regs[BFIN_LB1];
+	regs->usp = gdb_regs[BFIN_USP];
+	regs->syscfg = gdb_regs[BFIN_SYSCFG];
+	regs->retx = gdb_regs[BFIN_PC];
+	regs->retn = gdb_regs[BFIN_RETN];
+	regs->rete = gdb_regs[BFIN_RETE];
+	regs->pc = gdb_regs[BFIN_PC];
+
+#if 0	/* can't change these */
+	regs->astat = gdb_regs[BFIN_ASTAT];
+	regs->seqstat = gdb_regs[BFIN_SEQSTAT];
+	regs->ipend = gdb_regs[BFIN_IPEND];
+#endif
+
+}
+
+void kgdb_breakpoint(int argc, char *argv[])
+{
+	asm volatile ("excpt 0x1\n");
+}
diff --git a/lib_blackfin/kgdb.h b/lib_blackfin/kgdb.h
new file mode 100644
index 0000000..18f1f49
--- /dev/null
+++ b/lib_blackfin/kgdb.h
@@ -0,0 +1,160 @@
+/* Blackfin KGDB header
+ *
+ * Copyright 2005-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_BLACKFIN_KGDB_H__
+#define __ASM_BLACKFIN_KGDB_H__
+
+/* gdb locks */
+#define KGDB_MAX_NO_CPUS 8
+
+/*
+ * BUFMAX defines the maximum number of characters in inbound/outbound buffers.
+ * At least NUMREGBYTES*2 are needed for register packets.
+ * Longer buffer is needed to list all threads.
+ */
+#define BUFMAX 2048
+
+enum regnames {
+  /* Core Registers */
+  BFIN_R0 = 0,
+  BFIN_R1,
+  BFIN_R2,
+  BFIN_R3,
+  BFIN_R4,
+  BFIN_R5,
+  BFIN_R6,
+  BFIN_R7,
+  BFIN_P0,
+  BFIN_P1,
+  BFIN_P2,
+  BFIN_P3,
+  BFIN_P4,
+  BFIN_P5,
+  BFIN_SP,
+  BFIN_FP,
+  BFIN_I0,
+  BFIN_I1,
+  BFIN_I2,
+  BFIN_I3,
+  BFIN_M0,
+  BFIN_M1,
+  BFIN_M2,
+  BFIN_M3,
+  BFIN_B0,
+  BFIN_B1,
+  BFIN_B2,
+  BFIN_B3,
+  BFIN_L0,
+  BFIN_L1,
+  BFIN_L2,
+  BFIN_L3,
+  BFIN_A0_DOT_X,
+  BFIN_A0_DOT_W,
+  BFIN_A1_DOT_X,
+  BFIN_A1_DOT_W,
+  BFIN_ASTAT,
+  BFIN_RETS,
+  BFIN_LC0,
+  BFIN_LT0,
+  BFIN_LB0,
+  BFIN_LC1,
+  BFIN_LT1,
+  BFIN_LB1,
+  BFIN_CYCLES,
+  BFIN_CYCLES2,
+  BFIN_USP,
+  BFIN_SEQSTAT,
+  BFIN_SYSCFG,
+  BFIN_RETI,
+  BFIN_RETX,
+  BFIN_RETN,
+  BFIN_RETE,
+
+  /* Pseudo Registers */
+  BFIN_PC,
+  BFIN_CC,
+  BFIN_EXTRA1,		/* Address of .text section.  */
+  BFIN_EXTRA2,		/* Address of .data section.  */
+  BFIN_EXTRA3,		/* Address of .bss section.  */
+  BFIN_FDPIC_EXEC,
+  BFIN_FDPIC_INTERP,
+
+  /* MMRs */
+  BFIN_IPEND,
+
+  /* LAST ENTRY SHOULD NOT BE CHANGED.  */
+  BFIN_NUM_REGS		/* The number of all registers.  */
+};
+
+/* Number of bytes of registers.  */
+#define NUMREGBYTES (BFIN_NUM_REGS * 4)
+
+static inline void arch_kgdb_breakpoint(void)
+{
+	asm volatile ("EXCPT 2;");
+}
+#define BREAK_INSTR_SIZE	2
+#define CACHE_FLUSH_IS_SAFE	1
+#define GDB_ADJUSTS_BREAK_OFFSET
+#define GDB_SKIP_HW_WATCH_TEST
+#define HW_INST_WATCHPOINT_NUM	6
+#define HW_WATCHPOINT_NUM	8
+#define TYPE_INST_WATCHPOINT	0
+#define TYPE_DATA_WATCHPOINT	1
+
+/* Instruction watchpoint address control register bits mask */
+#define WPPWR		0x1
+#define WPIREN01	0x2
+#define WPIRINV01	0x4
+#define WPIAEN0		0x8
+#define WPIAEN1		0x10
+#define WPICNTEN0	0x20
+#define WPICNTEN1	0x40
+#define EMUSW0		0x80
+#define EMUSW1		0x100
+#define WPIREN23	0x200
+#define WPIRINV23	0x400
+#define WPIAEN2		0x800
+#define WPIAEN3		0x1000
+#define WPICNTEN2	0x2000
+#define WPICNTEN3	0x4000
+#define EMUSW2		0x8000
+#define EMUSW3		0x10000
+#define WPIREN45	0x20000
+#define WPIRINV45	0x40000
+#define WPIAEN4		0x80000
+#define WPIAEN5		0x100000
+#define WPICNTEN4	0x200000
+#define WPICNTEN5	0x400000
+#define EMUSW4		0x800000
+#define EMUSW5		0x1000000
+#define WPAND		0x2000000
+
+/* Data watchpoint address control register bits mask */
+#define WPDREN01	0x1
+#define WPDRINV01	0x2
+#define WPDAEN0		0x4
+#define WPDAEN1		0x8
+#define WPDCNTEN0	0x10
+#define WPDCNTEN1	0x20
+
+#define WPDSRC0		0xc0
+#define WPDACC0_OFFSET	8
+#define WPDSRC1		0xc00
+#define WPDACC1_OFFSET	12
+
+/* Watchpoint status register bits mask */
+#define STATIA0		0x1
+#define STATIA1		0x2
+#define STATIA2		0x4
+#define STATIA3		0x8
+#define STATIA4		0x10
+#define STATIA5		0x20
+#define STATDA0		0x40
+#define STATDA1		0x80
+
+#endif
diff --git a/lib_blackfin/string.c b/lib_blackfin/string.c
index 12b6d24..e344d3b 100644
--- a/lib_blackfin/string.c
+++ b/lib_blackfin/string.c
@@ -230,15 +230,45 @@ void *memcpy(void *dst, const void *src, size_t count)
 	if (!count)
 		return dst;
 
-	if (addr_bfin_on_chip_mem(dst)) {
-		/* L1 is the destination */
-		return dma_memcpy(dst, src, count);
+#ifdef CONFIG_CMD_KGDB
+	if (src >= (void *)SYSMMR_BASE) {
+		if (count == 2 && (unsigned long)src % 2 == 0) {
+			u16 mmr = bfin_read16(src);
+			memcpy(dst, &mmr, sizeof(mmr));
+			return dst;
+		}
+		if (count == 4 && (unsigned long)src % 4 == 0) {
+			u32 mmr = bfin_read32(src);
+			memcpy(dst, &mmr, sizeof(mmr));
+			return dst;
+		}
+		/* Failed for some reason */
+		memset(dst, 0xad, count);
+		return dst;
+	}
+	if (dst >= (void *)SYSMMR_BASE) {
+		if (count == 2 && (unsigned long)dst % 2 == 0) {
+			u16 mmr;
+			memcpy(&mmr, src, sizeof(mmr));
+			bfin_write16(dst, mmr);
+			return dst;
+		}
+		if (count == 4 && (unsigned long)dst % 4 == 0) {
+			u32 mmr;
+			memcpy(&mmr, src, sizeof(mmr));
+			bfin_write32(dst, mmr);
+			return dst;
+		}
+		/* Failed for some reason */
+		memset(dst, 0xad, count);
+		return dst;
+	}
+#endif
 
-	} else if (addr_bfin_on_chip_mem(src)) {
-		/* L1 is the source */
+	/* if L1 is the source or dst, use DMA */
+	if (addr_bfin_on_chip_mem(dst) || addr_bfin_on_chip_mem(src))
 		return dma_memcpy(dst, src, count);
-
-	} else
+	else
 		/* No L1 is involved, so just call regular memcpy */
 		return memcpy_ASM(dst, src, count);
 }
-- 
1.6.5.4

[U-Boot] [PATCH 0/5] kgdb cleanup and Blackfin kgdb port

[Wolfgang Denk]

Dear Mike Frysinger,

In message <1261438846-9675-1-git-send-email-vapier@gentoo.org> you wrote:
> I can take care of merging the Blackfin-specific KGDB piece through my
> tree since it depends on some other Blackfin patches.  But all the KGDB
> common changes can be merged now.
> 
> Mike Frysinger (1):
>   kgdb: drop duplicate debugger_exception_handler
> 
> Robin Getz (4):
>   kgdb: add default generic stubs
>   kgdb: update mem2hex/hex2mem funcs
>   asm-generic/signal.h: import from linux
>   Blackfin: add support for kgdb

I applied patches 1 through 3; can you please run 4 and 5 through the
BF tree?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Wenn das dann in die Hose geht, nehme ich es auf meine Kappe.
                                         -- Rudi V?ller, 15. Nov 2003

[U-Boot] Pull request u-boot-blackfin.git

[Mike Frysinger]

The following changes since commit 88ffb2665cd066b6b20cfaade13929d4e8428dde:
  Heiko Schocher (1):
        CRAMFS: support cramfs in RAM

are available in the git repository at:

  git://www.denx.de/git/u-boot-blackfin.git master

Robin Getz (2):
      asm-generic/signal.h: import from linux
      Blackfin: add support for kgdb

 cpu/blackfin/interrupt.S                     |  105 +++++++
 cpu/blackfin/traps.c                         |   57 ++++-
 include/asm-blackfin/config.h                |    7 +
 include/asm-blackfin/deferred.h              |   20 ++
 include/asm-blackfin/entry.h                 |   10 +
 include/asm-blackfin/mach-common/bits/core.h |    3 +
 include/asm-blackfin/signal.h                |    1 +
 include/asm-generic/signal.h                 |  101 ++++++
 include/configs/bfin_adi_common.h            |    1 +
 lib_blackfin/Makefile                        |    2 +
 lib_blackfin/__kgdb.S                        |  155 ++++++++++
 lib_blackfin/board.c                         |    6 +
 lib_blackfin/kgdb.c                          |  423 ++++++++++++++++++++++++++
 lib_blackfin/kgdb.h                          |  160 ++++++++++
 lib_blackfin/string.c                        |   44 +++-
 15 files changed, 1083 insertions(+), 12 deletions(-)
 create mode 100644 include/asm-blackfin/deferred.h
 create mode 100644 include/asm-blackfin/signal.h
 create mode 100644 include/asm-generic/signal.h
 create mode 100644 lib_blackfin/__kgdb.S
 create mode 100644 lib_blackfin/kgdb.c
 create mode 100644 lib_blackfin/kgdb.h

[U-Boot] Pull request u-boot-blackfin.git

[Wolfgang Denk]

Dear Mike Frysinger,

In message <1263778635-4003-1-git-send-email-vapier@gentoo.org> you wrote:
> The following changes since commit 88ffb2665cd066b6b20cfaade13929d4e8428dde:
>   Heiko Schocher (1):
>         CRAMFS: support cramfs in RAM
> 
> are available in the git repository at:
> 
>   git://www.denx.de/git/u-boot-blackfin.git master
> 
> Robin Getz (2):
>       asm-generic/signal.h: import from linux
>       Blackfin: add support for kgdb

Applied, thanks.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
 The software required `Windows 95 or better', so I installed Linux.