[ECOS] What functions should I call in ethernet drv ?

ariga masahiro ariga@link-lab.co.jp
Wed Oct 17 07:41:00 GMT 2007


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.

Thank you in advance.

Sincerely,

 Masahiro Ariga


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