eCos flash driver.

git-svn-id: svn://svn.berlios.de/openocd/trunk@365 b42882b7-edfa-0310-969c-e2dbd0fdcd60

7 files changed, 642 insertions, 0 deletions

diff --git a/ecosflash/Makefile b/ecosflash/Makefile
new file mode 100644
index 0000000..dfff37c
--- /dev/null
+++ b/ecosflash/Makefile
@@ -0,0 +1,11 @@
+# Create OpenOCD eCos flash driver
+# Syntax: make INSTALL_DIR=ecosinstalldir OUTPUT=outputname
+
+include $(INSTALL_DIR)/include/pkgconf/ecos.mak
+
+all:
+	$(ECOS_COMMAND_PREFIX)gcc $(ECOS_GLOBAL_CFLAGS) $(ECOS_GLOBAL_LDFLAGS) -g -o debug_$(OUTPUT).elf -nostdlib  flash.S flash.c -Wl,--gc-sections -I$(INSTALL_DIR)/include -Wl,$(INSTALL_DIR)/lib/libtarget.a -Wl,-Map,flash.map   
+	cp debug_$(OUTPUT).elf $(OUTPUT).elf
+	$(ECOS_COMMAND_PREFIX)strip $(OUTPUT).elf
+	echo Flash driver $(OUTPUT).elf
+
diff --git a/ecosflash/at91eb40a.elf b/ecosflash/at91eb40a.elf
new file mode 100644
index 0000000..451657a
--- /dev/null
+++ b/ecosflash/at91eb40a.elf
diff --git a/ecosflash/debug_at91eb40a.elf b/ecosflash/debug_at91eb40a.elf
new file mode 100644
index 0000000..0bada05
--- /dev/null
+++ b/ecosflash/debug_at91eb40a.elf
diff --git a/ecosflash/flash.S b/ecosflash/flash.S
new file mode 100644
index 0000000..dc30d16
--- /dev/null
+++ b/ecosflash/flash.S
@@ -0,0 +1,58 @@
+/*
+	Jump table for flash driver
+	
+	Registers in ARM callling convention is to place args in registers 
+	starting at r0.
+	
+	So for:
+	
+	void foo(int a, int b, int c).
+	
+	a=r0
+	b=r1
+	c=r2
+	
+	
+*/
+	.global _stack_base
+	.global _stack_start
+	.global _workarea
+	.global _start
+	.global _start_bss_clear
+_start:
+	// offset=0
+	// int erase(void *address, int len)
+	ldr     sp,=_stack_start                
+	bl erase
+	nop // Stop CPU here using hw breakpoint
+	
+	// offset=0xc
+	// int program(void *buffer, void *address, int len)	
+	ldr     sp,=_stack_start              
+	bl program
+	nop // Stop CPU here using hw breakpoint
+	
+	// offset=0x18
+	ldr     r0,=_workarea                
+	nop // Stop CPU here using hw breakpoint
+	
+	// offset=0x20
+	// int init() - returns error message if the flash chip can't be detected	
+	ldr     sp,=_stack_start              
+	bl init
+	nop // Stop CPU here using hw breakpoint
+
+    .section ".bss"
+    .balign 4
+_stack_base:
+        .rept 4096
+        .byte 0
+        .endr
+_stack_start:
+    .balign 4
+_workarea:
+        .rept 8192
+        .byte 0
+        .endr
+	// NB!!! we clear bss while the stack is in use, so we start BSS clearing here !!! :-)
+_start_bss_clear:
diff --git a/ecosflash/flash.c b/ecosflash/flash.c
new file mode 100644
index 0000000..654273d
--- /dev/null
+++ b/ecosflash/flash.c
@@ -0,0 +1,72 @@
+#include <string.h>
+#define _FLASH_PRIVATE_
+#include <cyg/io/flash.h>
+
+
+
+int myprintf(char *format, ...)
+{
+  return 0;
+}
+
+extern char _start_bss_clear;
+extern char __bss_end__;
+
+int init()
+{
+	// set up runtime environment
+	char *t;
+	for (t=&_start_bss_clear; t<&__bss_end__; t++)
+	{
+		*t=0;
+	}
+	return flash_init((_printf *)&myprintf);
+	
+}
+
+
+int checkFlash(void *addr, int len)
+{
+    // Return error for illegal addresses
+    if ((addr<flash_info.start)||(addr>flash_info.end))
+    	return FLASH_ERR_INVALID;
+    if ((((cyg_uint8 *)addr)+len)>(cyg_uint8 *)flash_info.end)
+    	return FLASH_ERR_INVALID;
+    return FLASH_ERR_OK;
+}
+
+
+int erase(void *address, int len)	
+{
+	int retval;
+	void *failAddress;
+	
+	retval=checkFlash(address, len);
+	if (retval!=0)
+		return retval;
+	
+	retval=init();
+	if (retval!=0)
+		return retval;
+	return flash_erase(address, len, &failAddress);
+}
+
+
+
+extern char _end;
+
+// Data follows immediately after program, long word aligned.
+int program(void *buffer, void *address, int len)	
+{
+	int retval;
+	void *failAddress;
+	retval=checkFlash(address, len);
+	if (retval!=0)
+		return retval;
+	
+	retval=init();
+	if (retval!=0)
+		return retval;
+	//int flash_program(void *_addr, void *_data, int len, void **err_addr)
+	return flash_program(address, buffer, len, &failAddress);
+}
diff --git a/ecosflash/flash.map b/ecosflash/flash.map
new file mode 100644
index 0000000..d47258b
--- /dev/null
+++ b/ecosflash/flash.map
@@ -0,0 +1,390 @@
+Archive member included because of file (symbol)
+
+/tmp/ecosboard/ecos/install/lib/libtarget.a(io_flash_flash.o)
+                              /ecos-c/DOCUME~1/oyvind/LOCALS~1/Temp/ccM8Ftqt.o (flash_init)
+/tmp/ecosboard/ecos/install/lib/libtarget.a(devs_flash_arm_eb40a_eb40a_flash.o)
+                              /tmp/ecosboard/ecos/install/lib/libtarget.a(io_flash_flash.o) (flash_hwr_init)
+/tmp/ecosboard/ecos/install/lib/libtarget.a(infra_memcpy.o)
+                              /tmp/ecosboard/ecos/install/lib/libtarget.a(io_flash_flash.o) (memcpy)
+/tmp/ecosboard/ecos/install/lib/libtarget.a(language_c_libc_string_memcmp.o)
+                              /tmp/ecosboard/ecos/install/lib/libtarget.a(io_flash_flash.o) (memcmp)
+
+Memory Configuration
+
+Name             Origin             Length             Attributes
+*default*        0x00000000         0xffffffff
+
+Linker script and memory map
+
+LOAD /ecos-c/DOCUME~1/oyvind/LOCALS~1/Temp/cccPBW5f.o
+LOAD /ecos-c/DOCUME~1/oyvind/LOCALS~1/Temp/ccM8Ftqt.o
+LOAD /tmp/ecosboard/ecos/install/lib/libtarget.a
+                0x00008000                PROVIDE (__executable_start, 0x8000)
+                0x00008000                . = 0x8000
+
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+                0x00008000                _start
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+                0x00008034       0x10 /ecos-c/DOCUME~1/oyvind/LOCALS~1/Temp/ccM8Ftqt.o
+                0x00008034                myprintf
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+                0x00008044                init
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+                0x00008154                program
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+
+.debug_ranges   0x00000000       0xb8
+ .debug_ranges  0x00000000       0x18 /tmp/ecosboard/ecos/install/lib/libtarget.a(io_flash_flash.o)
+ .debug_ranges  0x00000018       0x48 /tmp/ecosboard/ecos/install/lib/libtarget.a(devs_flash_arm_eb40a_eb40a_flash.o)
+ .debug_ranges  0x00000060       0x30 /tmp/ecosboard/ecos/install/lib/libtarget.a(infra_memcpy.o)
+ .debug_ranges  0x00000090       0x28 /tmp/ecosboard/ecos/install/lib/libtarget.a(language_c_libc_string_memcmp.o)
diff --git a/ecosflash/notes.txt b/ecosflash/notes.txt
new file mode 100644
index 0000000..2183912
--- /dev/null
+++ b/ecosflash/notes.txt
@@ -0,0 +1,111 @@
+1. GDB startup script for debugging purposes.

+

+# startup script for debugging flash erase

+target remote 10.0.0.56:2001

+monitor halt

+monitor reset

+load

+# stack

+monitor rm 13 0x7000

+# pc 

+monitor rm 15 0x8000

+# arg1 to erase()

+monitor rm 0 0x1030000

+# arg2 to erase()

+monitor rm 1 0x10000

+stepi

+

+

+

+2. Uploading flash driver via tftp

+

+

+$ tftp 10.0.0.108

+tftp> binary

+tftp> put at91fr40162.bin 10.0.0.108:/config/flashdriver.bin

+Sent 4048 bytes in 0.1 seconds

+tftp>

+

+

+4. Programming flash

+

+eCosBoard_prog 0x1000000 /config/testdata.bin

+ 

+ 

+tftp> put /cygdrive/c/workspace/ecosboard/ecosboard/phi/bootloader/images/bootloader.bin 10.0.0.108:/config/test.bin

+Sent 165724 bytes in 3.9 seconds

+

+

+halt

+reg cpsr 0x000000D3

+mww 0xFFE00020 0x1

+mww 0xFFE00024 0x00000000

+mww 0xFFE00000 0x01002539

+eCosBoard_profile

+eCosBoard_prog /config/test.bin 0x1000000

+eCosBoard_profile_done

+

+

+

+

+set remote memory-write-packet-size fixed

+

+

+set remote memory-write-packet-size 8192

+set remote memory-map-packet on

+target remote 10.0.0.108:3333

+monitor halt

+monitor reg cpsr 0x000000D3

+monitor mww 0xFFE00020 0x1

+monitor mww 0xFFE00024 0x00000000

+monitor mww 0xFFE00000 0x01002539

+

+

+monitor eCosBoard_profile

+load

+monitor eCosBoard_profile_done

+

+

+source /tmp/ecosboard/packages/services/profile/gprof/current/host/gprof.gdb

+gprof_dump

+shell cp gmon.out /tmp/ecosboard/build/src

+echo To view: cd /tmp/ecosboard/build/src && gprof openocd

+

+

+Performance problems:

+

+It seems the problem is that the actual flash programming takes time. 

+hal_delay_us() is invoked between each time the 

+CPU is polled for whether flash programming has completed.

+

+

+Flat profile:

+

+Each sample counts as 0.01 seconds.

+  %   cumulative   self              self     total

+ time   seconds   seconds    calls  Ts/call  Ts/call  name

+ 35.82     37.66    37.66                             hal_delay_us

+ 11.90     50.17    12.51                             arm7tdmi_clock_out

+  9.86     60.54    10.37                             gdb_get_packet

+  5.36     66.17     5.63                             memcpy

+  4.34     70.73     4.56                             target_buffer_get_u32

+  3.34     74.25     3.51                             embeddedice_read_reg_w_che

+ck

+  1.39     75.71     1.46                             arm7_9_write_memory

+  1.34     77.11     1.40                             cyg_tcp_output

+  1.33     78.51     1.40                             __udivsi3

+  1.11     79.68     1.17                             cyg_tcp_input

+  1.07     80.80     1.13                             arm7tdmi_store_word_regs

+  0.95     81.81     1.00                             __udivdi3

+  0.95     82.80     1.00                             __umodsi3

+  0.93     83.78     0.98                             arm7tdmi_write_core_regs

+  0.86     84.68     0.91                             arm7_9_poll

+  0.85     85.57     0.89                             memset

+  0.77     86.38     0.81                             cyg_splx

+  0.64     87.05     0.67                             cyg_in_cksumdata

+  0.63     87.71     0.66                             openeth_deliver

+  0.57     88.31     0.60                             strstr

+  0.51     88.85     0.53                             eth_drv_recv

+  0.49     89.36     0.52                             cyg_splinternal

+  0.49     89.88     0.52                             cyg_splimp

+  0.46     90.36     0.48                             cyg_ip_input
\ No newline at end of file