* Fix data abort exception handling for arm920t CPU

* Fix alignment problems with flash driver for TRAB board

* Patch by Donald White, 21 May 2003:
  fix calculation of base address in pci_hose_config_device()

* Fix bug in command line parsing: "cmd1;cmd2" is supposed to always
  execute "cmd2", even if "cmd1" fails. Note that this is different
  to "run var1 var2" where the contents of "var2" will NOT be
  executed when a command in "var1" fails.

6 files changed, 178 insertions, 127 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 10ae064..f28631a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,18 @@
 Changes since U-Boot 0.3.1:
 ======================================================================
 
+* Fix data abort exception handling for arm920t CPU
+
+* Fix alignment problems with flash driver for TRAB board
+
+* Patch by Donald White, 21 May 2003:
+  fix calculation of base address in pci_hose_config_device()
+
+* Fix bug in command line parsing: "cmd1;cmd2" is supposed to always
+  execute "cmd2", even if "cmd1" fails. Note that this is different
+  to "run var1 var2" where the contents of "var2" will NOT be
+  executed when a command in "var1" fails.
+
 * Add zero-copy ramdisk support (requires corresponding kernel support!)
 
 * Patch by Kyle Harris, 20 May 2003:
diff --git a/README b/README
index ecc087a..e9b7145 100644
--- a/README
+++ b/README
@@ -2048,6 +2048,48 @@ Please note that changes to some configuration parameters may take
 only effect after the next boot (yes, that's just like Windoze :-).
 
 
+Command Line Parsing:
+=====================
+
+There are two different command line parsers available  with  U-Boot:
+the old "simple" one, and the much more pwerful "hush" shell:
+
+Old, simple command line parser:
+--------------------------------
+
+- supports environment variables (through setenv / saveenv commands)
+- several commands on one line, separated by ';'
+- variable substitution using "... $(name) ..." syntax
+- special characters ('$', ';') can be escaped by prefixing with '\',
+  for example:
+	setenv bootcmd bootm \$(address)
+- You can also escape text by enclosing in single apostrophes, for example:
+	setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off'
+
+Hush shell:
+-----------
+
+- similar to Bourne shell, with control structures like
+  if...then...else...fi, for...do...done; while...do...done,
+  until...do...done, ...
+- supports environment ("global") variables (through setenv / saveenv
+  commands) and local shell variables (through standard shell syntax
+  "name=value"); only environment variables can be used with "run"
+  command
+
+General rules:
+--------------
+
+(1) If a command line (or an environment variable executed by a "run"
+    command) contains several commands separated by semicolon, and
+    one of these commands fails, then the remaining commands will be
+    executed anyway.
+
+(2) If you execute several variables with one call to run (i. e.
+    calling run with a list af variables as arguments), any failing
+    command will cause "run" to terminate, i. e. the remaining
+    variables are not executed.
+
 Note for Redundant Ethernet Interfaces:
 =======================================
 
@@ -2563,9 +2605,9 @@ Minicom warning:
 ================
 
 Over time, many people have reported problems when trying to used the
-"minicom" terminal emulation program  for  serial  download.  I  (wd)
-consider  minicom  to  be  broken, and recommend not to use it. Under
-Unix, I recommend  to  use  CKermit  for  general  purpose  use  (and
+"minicom" terminal emulation program for serial download. I (wd)
+consider minicom to be broken, and recommend not to use it. Under
+Unix, I recommend to use C-Kermit for general purpose use (and
 especially for kermit binary protocol download ("loadb" command), and
 use "cu" for S-Record download ("loads" command).
 
diff --git a/board/trab/flash.c b/board/trab/flash.c
index 27c2a5b..1550e17 100644
--- a/board/trab/flash.c
+++ b/board/trab/flash.c
@@ -431,7 +431,15 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 	 * handle word aligned part
 	 */
 	while (cnt >= 4) {
-		data = *((vu_long *) src);
+		if (((ulong)src) & 0x3) {
+			for (i = 0; i < 4; i++) {
+				((char *)&data)[i] = ((vu_char *)src)[i];
+			}
+		}
+		else {
+			data = *((vu_long *) src);
+		}
+			
 		if ((rc = write_word (info, wp, data)) != 0) {
 			return (rc);
 		}
diff --git a/common/main.c b/common/main.c
index fe4ebb4..6192dff 100644
--- a/common/main.c
+++ b/common/main.c
@@ -746,9 +746,9 @@ int run_command (const char *cmd, int flag)
 	char finaltoken[CFG_CBSIZE];
 	char *str = cmdbuf;
 	char *argv[CFG_MAXARGS + 1];	/* NULL terminated	*/
-	int argc;
+	int argc, inquotes;
 	int repeatable = 1;
-	int inquotes;
+	int rc = 0;
 
 #ifdef DEBUG_PARSER
 	printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
@@ -817,13 +817,15 @@ int run_command (const char *cmd, int flag)
 		/* Look up command in command table */
 		if ((cmdtp = find_cmd(argv[0])) == NULL) {
 			printf ("Unknown command '%s' - try 'help'\n", argv[0]);
-			return -1;	/* give up after bad command */
+			rc = -1;	/* give up after bad command */
+			continue;
 		}
 
 		/* found - check max args */
 		if (argc > cmdtp->maxargs) {
 			printf ("Usage:\n%s\n", cmdtp->usage);
-			return -1;
+			rc = -1;
+			continue;
 		}
 
 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD)
@@ -834,7 +836,8 @@ int run_command (const char *cmd, int flag)
 #endif
 			if (flag & CMD_FLAG_BOOTD) {
 				printf ("'bootd' recursion detected\n");
-				return -1;
+				rc = -1;
+				continue;
 			}
 			else
 				flag |= CMD_FLAG_BOOTD;
@@ -843,7 +846,7 @@ int run_command (const char *cmd, int flag)
 
 		/* OK - call function to do the command */
 		if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
-			return (-1);
+			rc = -1;
 		}
 
 		repeatable &= cmdtp->repeatable;
@@ -853,7 +856,7 @@ int run_command (const char *cmd, int flag)
 			return 0;	/* if stopped then not repeatable */
 	}
 
-	return repeatable;
+	return rc ? rc : repeatable;
 }
 
 /****************************************************************************/
diff --git a/cpu/arm920t/start.S b/cpu/arm920t/start.S
index 4a4825a..ed16176 100644
--- a/cpu/arm920t/start.S
+++ b/cpu/arm920t/start.S
@@ -317,17 +317,15 @@ cpu_init_crit:
 	.macro	bad_save_user_regs
 	sub	sp, sp, #S_FRAME_SIZE
 	stmia	sp, {r0 - r12}			@ Calling r0-r12
-	add     r8, sp, #S_PC
-
 	ldr	r2, _armboot_end
 	add	r2, r2, #CONFIG_STACKSIZE
 	sub	r2, r2, #8
-	ldmia	r2, {r2 - r4}                   @ get pc, cpsr, old_r0
+	ldmia	r2, {r2 - r3}			@ get pc, cpsr
 	add	r0, sp, #S_FRAME_SIZE		@ restore sp_SVC
 
 	add	r5, sp, #S_SP
 	mov	r1, lr
-	stmia	r5, {r0 - r4}                   @ save sp_SVC, lr_SVC, pc, cpsr, old_r
+	stmia	r5, {r0 - r3}			@ save sp_SVC, lr_SVC, pc, cpsr
 	mov	r0, sp
 	.endm
 
diff --git a/drivers/pci.c b/drivers/pci.c
index 9eaaa15..289db8f 100644
--- a/drivers/pci.c
+++ b/drivers/pci.c
@@ -2,7 +2,7 @@
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
  *
- * (C) Copyright 2002
+ * (C) Copyright 2002, 2003
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * See file CREDITS for list of people who contributed to this
@@ -48,12 +48,12 @@
  *
  */
 
-#define PCI_HOSE_OP(rw, size, type)						\
-int pci_hose_##rw##_config_##size(struct pci_controller *hose, 			\
-				  pci_dev_t dev, 				\
-				  int offset, type value)			\
-{										\
-	return hose->rw##_##size(hose, dev, offset, value);			\
+#define PCI_HOSE_OP(rw, size, type)					\
+int pci_hose_##rw##_config_##size(struct pci_controller *hose, 		\
+				  pci_dev_t dev, 			\
+				  int offset, type value)		\
+{									\
+	return hose->rw##_##size(hose, dev, offset, value);		\
 }
 
 PCI_HOSE_OP(read, byte, u8 *)
@@ -63,18 +63,18 @@ PCI_HOSE_OP(write, byte, u8)
 PCI_HOSE_OP(write, word, u16)
 PCI_HOSE_OP(write, dword, u32)
 
-#define PCI_OP(rw, size, type, error_code)					\
-int pci_##rw##_config_##size(pci_dev_t dev, int offset, type value)		\
-{										\
-	struct pci_controller *hose = pci_bus_to_hose(PCI_BUS(dev));		\
-										\
-	if (!hose)								\
-	{									\
-		error_code;							\
-		return -1;							\
-	}									\
-										\
-	return pci_hose_##rw##_config_##size(hose, dev, offset, value);		\
+#define PCI_OP(rw, size, type, error_code)				\
+int pci_##rw##_config_##size(pci_dev_t dev, int offset, type value)	\
+{									\
+	struct pci_controller *hose = pci_bus_to_hose(PCI_BUS(dev));	\
+									\
+	if (!hose)							\
+	{								\
+		error_code;						\
+		return -1;						\
+	}								\
+									\
+	return pci_hose_##rw##_config_##size(hose, dev, offset, value);	\
 }
 
 PCI_OP(read, byte, u8 *, *value = 0xff)
@@ -84,40 +84,40 @@ PCI_OP(write, byte, u8, )
 PCI_OP(write, word, u16, )
 PCI_OP(write, dword, u32, )
 
-#define PCI_READ_VIA_DWORD_OP(size, type, off_mask)				\
-int pci_hose_read_config_##size##_via_dword(struct pci_controller *hose,	\
-					pci_dev_t dev, 				\
-					int offset, type val)			\
-{										\
-	u32 val32;								\
-										\
-	if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)	\
-		return -1;							\
-										\
-	*val = (val32 >> ((offset & (int)off_mask) * 8));			\
-										\
-	return 0;								\
+#define PCI_READ_VIA_DWORD_OP(size, type, off_mask)			\
+int pci_hose_read_config_##size##_via_dword(struct pci_controller *hose,\
+					pci_dev_t dev, 			\
+					int offset, type val)		\
+{									\
+	u32 val32;							\
+									\
+	if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)\
+		return -1;						\
+									\
+	*val = (val32 >> ((offset & (int)off_mask) * 8));		\
+									\
+	return 0;							\
 }
 
-#define PCI_WRITE_VIA_DWORD_OP(size, type, off_mask, val_mask)			\
-int pci_hose_write_config_##size##_via_dword(struct pci_controller *hose,	\
-					     pci_dev_t dev, 			\
-					     int offset, type val)		\
-{										\
-	u32 val32, mask, ldata;							\
-										\
-	if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)	\
-		return -1;							\
-										\
-	mask = val_mask;							\
+#define PCI_WRITE_VIA_DWORD_OP(size, type, off_mask, val_mask)		\
+int pci_hose_write_config_##size##_via_dword(struct pci_controller *hose,\
+					     pci_dev_t dev, 		\
+					     int offset, type val)	\
+{									\
+	u32 val32, mask, ldata;						\
+									\
+	if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)\
+		return -1;						\
+									\
+	mask = val_mask;						\
 	ldata = (((unsigned long)val) & mask) << ((offset & (int)off_mask) * 8);\
-	mask <<= ((mask & (int)off_mask) * 8);					\
-	val32 = (val32 & ~mask) | ldata;					\
-										\
-	if (pci_hose_write_config_dword(hose, dev, offset & 0xfc, val32) < 0)	\
-		return -1;							\
-										\
-	return 0;								\
+	mask <<= ((mask & (int)off_mask) * 8);				\
+	val32 = (val32 & ~mask) | ldata;				\
+									\
+	if (pci_hose_write_config_dword(hose, dev, offset & 0xfc, val32) < 0)\
+		return -1;						\
+									\
+	return 0;							\
 }
 
 PCI_READ_VIA_DWORD_OP(byte, u8 *, 0x03)
@@ -143,13 +143,12 @@ void pci_register_hose(struct pci_controller* hose)
 	*phose = hose;
 }
 
-struct pci_controller* pci_bus_to_hose(int bus)
+struct pci_controller *pci_bus_to_hose (int bus)
 {
 	struct pci_controller *hose;
 
 	for (hose = hose_head; hose; hose = hose->next)
-		if (bus >= hose->first_busno &&
-		    bus <= hose->last_busno)
+		if (bus >= hose->first_busno && bus <= hose->last_busno)
 			return hose;
 
 	return NULL;
@@ -178,16 +177,13 @@ pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
 #endif
 			     bdf += PCI_BDF(0,0,1))
 			{
-				if (!PCI_FUNC(bdf))
-				{
+				if (!PCI_FUNC(bdf)) {
 					pci_read_config_byte(bdf,
 							     PCI_HEADER_TYPE,
 							     &header_type);
 
 					found_multi = header_type & 0x80;
-				}
-				else
-				{
+				} else {
 					if (!found_multi)
 						continue;
 				}
@@ -228,22 +224,20 @@ pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
  *
  */
 
-unsigned long pci_hose_phys_to_bus(struct pci_controller* hose,
-				   unsigned long phys_addr,
-				   unsigned long flags)
+unsigned long pci_hose_phys_to_bus (struct pci_controller *hose,
+				    unsigned long phys_addr,
+				    unsigned long flags)
 {
 	struct pci_region *res;
 	unsigned long bus_addr;
 	int i;
 
-	if (!hose)
-	{
-		printf("pci_hose_phys_to_bus: %s\n", "invalid hose");
+	if (!hose) {
+		printf ("pci_hose_phys_to_bus: %s\n", "invalid hose");
 		goto Done;
 	}
 
-	for (i=0; i<hose->region_count; i++)
-	{
+	for (i = 0; i < hose->region_count; i++) {
 		res = &hose->regions[i];
 
 		if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
@@ -252,15 +246,14 @@ unsigned long pci_hose_phys_to_bus(struct pci_controller* hose,
 		bus_addr = phys_addr - res->phys_start + res->bus_start;
 
 		if (bus_addr >= res->bus_start &&
-		    bus_addr <  res->bus_start + res->size)
-		{
+			bus_addr < res->bus_start + res->size) {
 			return bus_addr;
 		}
 	}
 
-	printf("pci_hose_phys_to_bus: %s\n", "invalid physical address");
+	printf ("pci_hose_phys_to_bus: %s\n", "invalid physical address");
 
- Done:
+Done:
 	return 0;
 }
 
@@ -271,29 +264,26 @@ unsigned long pci_hose_bus_to_phys(struct pci_controller* hose,
 	struct pci_region *res;
 	int i;
 
-	if (!hose)
-	{
-		printf("pci_hose_bus_to_phys: %s\n", "invalid hose");
+	if (!hose) {
+		printf ("pci_hose_bus_to_phys: %s\n", "invalid hose");
 		goto Done;
 	}
 
-	for (i=0; i<hose->region_count; i++)
-	{
+	for (i = 0; i < hose->region_count; i++) {
 		res = &hose->regions[i];
 
 		if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
 			continue;
 
 		if (bus_addr >= res->bus_start &&
-		    bus_addr <  res->bus_start + res->size)
-		{
+			bus_addr < res->bus_start + res->size) {
 			return bus_addr - res->bus_start + res->phys_start;
 		}
 	}
 
-	printf("pci_hose_bus_to_phys: %s\n", "invalid physical address");
+	printf ("pci_hose_bus_to_phys: %s\n", "invalid physical address");
 
- Done:
+Done:
 	return 0;
 }
 
@@ -311,14 +301,14 @@ int pci_hose_config_device(struct pci_controller *hose,
 	unsigned char pin;
 	int bar, found_mem64;
 
-	DEBUGF("PCI Config: I/O=0x%lx, Memory=0x%lx, Command=0x%lx\n", io, mem, command);
+	DEBUGF ("PCI Config: I/O=0x%lx, Memory=0x%lx, Command=0x%lx\n",
+		io, mem, command);
 
-	pci_hose_write_config_dword(hose, dev, PCI_COMMAND, 0);
+	pci_hose_write_config_dword (hose, dev, PCI_COMMAND, 0);
 
-	for (bar = PCI_BASE_ADDRESS_0; bar < PCI_BASE_ADDRESS_5; bar += 4)
-	{
-		pci_hose_write_config_dword(hose, dev, bar, 0xffffffff);
-		pci_hose_read_config_dword(hose, dev, bar, &bar_response);
+	for (bar = PCI_BASE_ADDRESS_0; bar < PCI_BASE_ADDRESS_5; bar += 4) {
+		pci_hose_write_config_dword (hose, dev, bar, 0xffffffff);
+		pci_hose_read_config_dword (hose, dev, bar, &bar_response);
 
 		if (!bar_response)
 			continue;
@@ -326,51 +316,51 @@ int pci_hose_config_device(struct pci_controller *hose,
 		found_mem64 = 0;
 
 		/* Check the BAR type and set our address mask */
-		if (bar_response & PCI_BASE_ADDRESS_SPACE)
-		{
+		if (bar_response & PCI_BASE_ADDRESS_SPACE) {
 			bar_size = ~(bar_response & PCI_BASE_ADDRESS_IO_MASK) + 1;
-			bar_value = io;
-
+			/* round up region base address to a multiple of size */
 			io = ((io - 1) | (bar_size - 1)) + 1;
-		}
-		else
-		{
-			if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
-			     PCI_BASE_ADDRESS_MEM_TYPE_64)
+			bar_value = io;
+			/* compute new region base address */
+			io = io + bar_size;
+		} else {
+			if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
+				PCI_BASE_ADDRESS_MEM_TYPE_64)
 				found_mem64 = 1;
 
 			bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
-			bar_value = mem;
 
+			/* round up region base address to multiple of size */
 			mem = ((mem - 1) | (bar_size - 1)) + 1;
+			bar_value = mem;
+			/* compute new region base address */
+			mem = mem + bar_size;
 		}
 
 		/* Write it out and update our limit */
-		pci_hose_write_config_dword(hose, dev, bar, bar_value);
+		pci_hose_write_config_dword (hose, dev, bar, bar_value);
 
-		if (found_mem64)
-		{
+		if (found_mem64) {
 			bar += 4;
-			pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
+			pci_hose_write_config_dword (hose, dev, bar, 0x00000000);
 		}
 	}
 
 	/* Configure Cache Line Size Register */
-	pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
+	pci_hose_write_config_byte (hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
 
 	/* Configure Latency Timer */
-	pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
+	pci_hose_write_config_byte (hose, dev, PCI_LATENCY_TIMER, 0x80);
 
 	/* Disable interrupt line, if device says it wants to use interrupts */
-	pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
-	if (pin != 0)
-	{
-		pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, 0xff);
+	pci_hose_read_config_byte (hose, dev, PCI_INTERRUPT_PIN, &pin);
+	if (pin != 0) {
+		pci_hose_write_config_byte (hose, dev, PCI_INTERRUPT_LINE, 0xff);
 	}
 
-	pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &old_command);
-	pci_hose_write_config_dword(hose, dev, PCI_COMMAND,
-				    (old_command & 0xffff0000) | command );
+	pci_hose_read_config_dword (hose, dev, PCI_COMMAND, &old_command);
+	pci_hose_write_config_dword (hose, dev, PCI_COMMAND,
+				     (old_command & 0xffff0000) | command);
 
 	return 0;
 }
@@ -389,15 +379,13 @@ struct pci_config_table *pci_find_config(struct pci_controller *hose,
 {
 	struct pci_config_table *table;
 
-	for (table = hose->config_table; table && table->vendor; table++)
-	{
+	for (table = hose->config_table; table && table->vendor; table++) {
 		if ((table->vendor == PCI_ANY_ID || table->vendor == vendor) &&
 		    (table->device == PCI_ANY_ID || table->device == device) &&
 		    (table->class  == PCI_ANY_ID || table->class  == class)  &&
 		    (table->bus    == PCI_ANY_ID || table->bus    == bus)    &&
 		    (table->dev    == PCI_ANY_ID || table->dev    == dev)    &&
-		    (table->func   == PCI_ANY_ID || table->func   == func))
-		{
+		    (table->func   == PCI_ANY_ID || table->func   == func)) {
 			return table;
 		}
 	}