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Re: What functions should I call in ethernet drv ?
ariga masahiro wrote:
> Hello Gary and others,
>
> Sorry I missed 10/16/2007 20:08 mail,
> I will prepare tar file and send you soon.
>
> Before that,
> Some points became cleared and also arose other question
> and I rely on your suggestion.
>
> I think the trouble is not my amendment or coding,rather how I 'use'
> eCos application.
> Let me explain.
>
> I debugged on the next premise.
>
> [premise]
> There are no assingments to function
> pointers(e.g.ng_ether_attach_p,ng_ether_input_p) in coding,
> so their inside values(=function addresses) are settled at the time of
> loading binary into RAM.
> They are initially defined in
> \packages\net\bsd_tcpip\current\include\sys\param.h like next
> #define ng_ether_attach_p cyg_ng_ether_attach_p
> .
>
> On the above premise I decided to check on sampled
> Hitachi SE77x9 Template that I used as protocol to develop my target
> template.
> Source is CVS current version ,so it must work correctly.
> I just only amended memory layout as same as my target template.
>
> I built 'RAM' Start Mode and linked to nc_test_slave test.
> I loaded elf file on RAM using ICE,and dumped memory addresses.
>
> Result was just as same as my template.
>
> --from memory map
> COMMON 0x000000008c0c0208 0x18
> /ecos-c/cygwin/home/LINK/ecoscvs_se-net-SE7709-2/untitled_install/lib/libtarget.a(net_bsd_tcpip_if_ethersubr.o)
>
> 0x0 (size before relaxing)
> 0x000000008c0c0208 _cyg_ng_ether_input_p
> 0x000000008c0c020c _cyg_ng_ether_detach_p
> 0x000000008c0c0210 _sysctl__net_link_ether_children
> 0x000000008c0c0214 _cyg_ng_ether_attach_p
> 0x000000008c0c0218 _cyg_ng_ether_output_p
> 0x000000008c0c021c _cyg_ng_ether_input_orphan_p
> COMMON 0x000000008c0c0220 0xe8
> /ecos-c/cygwin/home/LINK/ecoscvs_se-net-SE7709-2/untitled_install/lib/libtarget.a(net_bsd_tcpip_if_loop.o)
>
>
> and memory dump after loading.
> URAM 8C0C0214 cyg_ng_ether_attach_p 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C021C cyg_ng_ether_input_orphan_p 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C0224 cyg_loif+4 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C022C cyg_loif+c 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C0234 cyg_loif+14 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C023C cyg_loif+1c 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C0244 cyg_loif+24 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C024C cyg_loif+2c 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C0254 cyg_loif+34 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C025C cyg_loif+3c 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C0264 cyg_loif+44 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C026C cyg_loif+4c 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C0274 cyg_loif+54 00 00 00 00 00 00 00 00
> ........
> URAM 8C0C027C cyg_loif+5c 00 00 00 00 00 00 00 00
> ........
>
> I put on my target's memory layout files.
> \packages\hal\sh\inserter\current\include\pkgconf\mlt_sh_sh77x9_inserter_ram.ldi
>
> --- begin
> #include <cyg/infra/cyg_type.inc>
>
> MEMORY
> {
> ram : ORIGIN = 0x8c000000, LENGTH = 0x4000000
> }
>
> SECTIONS
> {
> SECTIONS_BEGIN
> SECTION_vectors (ram, 0x8c010000, LMA_EQ_VMA)
> SECTION_text (ram, ALIGN (0x4), LMA_EQ_VMA)
> SECTION_fini (ram, ALIGN (0x4), LMA_EQ_VMA)
> SECTION_rodata1 (ram, ALIGN (0x8), LMA_EQ_VMA)
> SECTION_rodata (ram, ALIGN (0x8), LMA_EQ_VMA)
> SECTION_fixup (ram, ALIGN (0x4), LMA_EQ_VMA)
> SECTION_gcc_except_table (ram, ALIGN (0x1), LMA_EQ_VMA)
> SECTION_data (ram, ALIGN (0x8), LMA_EQ_VMA)
> SECTION_bss (ram, ALIGN (0x10), LMA_EQ_VMA)
> CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
> SECTIONS_END
> }
> --- end
>
> \packages\hal\sh\inserter\current\include\pkgconf\mlt_sh_sh77x9_inserter_ram.h
>
> --- begin
> #ifndef __ASSEMBLER__
> #include <cyg/infra/cyg_type.h>
> #include <stddef.h>
>
> #endif
> #define CYGMEM_REGION_ram (0x8c000000)
> #define CYGMEM_REGION_ram_SIZE (0x4000000)
> #define CYGMEM_REGION_ram_ATTR (CYGMEM_REGION_ATTR_R |
> CYGMEM_REGION_ATTR_W)
> #ifndef __ASSEMBLER__
> extern char CYG_LABEL_NAME (__heap1) [];
> #endif
> #define CYGMEM_SECTION_heap1 (CYG_LABEL_NAME (__heap1))
> #define CYGMEM_SECTION_heap1_SIZE (0x90000000 - (size_t) CYG_LABEL_NAME
> (__heap1))
> #ifndef __ASSEMBLER__
> extern char CYG_LABEL_NAME (__pci_window) [];
> #endif
> --- end
>
> and application makefile
> --- begin
> export PREFIX :=
> /ecos-c/cygwin/home/LINK/ecoscvs_l_net_20071015/unnamed2_install
>
> export COMMAND_PREFIX := sh-elf-
> export CC := $(COMMAND_PREFIX)gcc
> export OBJCOPY := $(COMMAND_PREFIX)objcopy
> export HOST := CYGWIN
> export AR := $(COMMAND_PREFIX)ar
>
> XCC = sh-elf-gcc
>
> ## Build flags.
> CFLAGS = -g -Wall -I$(PREFIX)/include -ffunction-sections -fdata-sections
> LDFLAGS = -nostartfiles -L$(PREFIX)/lib -Wl,--gc-sections -Wl,--Map
> -Wl,nc_test_slave.map
> LIBS = -Ttarget.ld -nostdlib
> LD = $(XCC)
>
> ## Build rules.
> all: nc_test_slave
>
> nc_test_slave.o: nc_test_slave.c
> $(XCC) -c -o $*.o $(CFLAGS) $<
>
> nc_test_slave: nc_test_slave.o
> $(LD) $(LDFLAGS) -o $@ $@.o $(LIBS)
>
> clean:
> -rm -f nc_test_slave.exe nc_test_slave.o nc_test_slave.map
> --- end
>
>> From above result I suppose I must do 'something' to make LAN91C111
>> driver
> work,
> or my environments lack somthing ?
>
> If you could elicit any conclusion from above accounts
> please enligten me.
>
> I look foward to any suggestion.
Firstly, the fact that cyg_ng_ether_input_p is NULL is not important.
This is just an [optional] hook function for handling NetGraph protocol events.
Have you traced the actual ethernet driver ?
(.../devs/eth/smsc/lan91cxx/current/src/if_lan91cxx.c )
I'd start by setting DEBUG=0xFF (manually, you have to edit that file).
This will turn on lots of messages and should guide you as to why the
driver is not working.
Note: the upper layers of the network code (and indeed most of the
drivers) are well proven - you probably don't need to be hunting
there for bugs, at least not the "out of the starting block" kind
that you have. Stick to the actual driver :-)
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
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