openwrt/flashrom
1
0
Fork 0
mirror of https://review.coreboot.org/flashrom.git synced 2025-04-26 22:52:34 +02:00
Code Issues Releases Wiki Activity

Fix the documentation and DOS port

Browse Source 
Update the DOS cross-compile documentation,
and workaround issue with valloc() with the
latest DJGPP.

Change-Id: I909c5635aec5076440d2fde73d943f8ad10b8051
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Reviewed-on: https://review.coreboot.org/23044
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Rudolf Marek 2017-12-29 16:30:49 +01:00 committed by Nico Huber
parent 7372866ef4
commit e7792e3b83
2 changed files with 53 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
README
View File

@ -97,27 +97,43 @@ To cross-compile on Linux for DOS:
Get packages of the DJGPP cross compiler and install them:
djgpp-filesystem djgpp-gcc djgpp-cpp djgpp-runtime djgpp-binutils
As an alternative, the DJGPP web site offers packages for download as well:
djcross-binutils-2.19.1-10ap.i386.rpm
djcross-gcc-4.3.2-8ap.i686.rpm
djcrx-2.04pre_20090725-13ap.i386.rpm
djcross-binutils-2.29.1-1ap.x86_64.rpm
djcross-gcc-7.2.0-1ap.x86_64.rpm
djcrx-2.05-5.x86_64.rpm
The cross toolchain packages for your distribution may have slightly different
names (look for packages named *djgpp*).
You will need the following library source trees containing their compiled
static libraries either in the parent directory of the flashrom source or
specify the base folder on compile time with the LIBS_BASE parameter.
The default as described above is equal to calling
'make djgpp-dos LIBS_BASE=..'
Alternatively, you could use a script to build it from scratch:
https://github.com/andrewwutw/build-djgpp
You will need the libpci and libgetopt library source trees and
their compiled static libraries and header files installed in some
directory say libpci-libgetopt/, which will be later specified with
LIBS_BASE parameter during flashrom compilation. Easiest way to
handle it is to put pciutils, libgetopt and flashrom directories
in one subdirectory. There will be an extra subdirectory libpci-libgetopt
created, which will contain compiled libpci and libgetopt.
Download pciutils 3.5.6 and apply http://flashrom.org/File:Pciutils-3.5.6.patch.gz
Compile pciutils, using following command line:
make ZLIB=no DNS=no HOST=i386-djgpp-djgpp CROSS_COMPILE=i586-pc-msdosdjgpp- \
PREFIX=/ DESTDIR=$PWD/../libpci-libgetopt \
STRIP="--strip-program=i586-pc-msdosdjgpp-strip -s" install install-lib
Download and compile with 'make' http://flashrom.org/File:Libgetopt.tar.gz
Copy the libgetopt.a to ../libpci-libgetopt/lib and
getopt.h to ../libpci-libgetopt/include
To get and build said libraries...
Download pciutils 3.1.5 and apply http://flashrom.org/File:Pciutils.patch.gz
Compile pciutils, see README.DJGPP for instructions.
Download and compile http://flashrom.org/File:Libgetopt.tar.gz
Enter the flashrom directory.
Run either (change settings where appropriate)
make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip
or (above settings hardcoded)
make djgpp-dos
make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip LIBS_BASE=../libpci-libgetopt/ strip
If you like, you can compress the resulting executable with UPX:
upx -9 flashrom.exe
To run flashrom.exe, download http://flashrom.org/File:Csdpmi7b.zip and
unpack CWSDPMI.EXE into the current directory or one in PATH.

31
physmap.c
View File

@ -38,29 +38,40 @@
#ifdef __DJGPP__
#include <dpmi.h>
#include <malloc.h>
#include <sys/nearptr.h>
#define ONE_MEGABYTE (1024 * 1024)
#define MEM_DEV "dpmi"
static void *realmem_map;
static void *realmem_map_aligned;
static void *map_first_meg(uintptr_t phys_addr, size_t len)
{
if (realmem_map)
return realmem_map + phys_addr;
void *realmem_map;
size_t pagesize;
realmem_map = valloc(1024 * 1024);
if (realmem_map_aligned)
return realmem_map_aligned + phys_addr;
/* valloc() from DJGPP 2.05 does not work properly */
pagesize = getpagesize();
realmem_map = malloc(ONE_MEGABYTE + pagesize);
if (!realmem_map)
return ERROR_PTR;
if (__djgpp_map_physical_memory(realmem_map, (1024 * 1024), 0)) {
realmem_map_aligned = (void *)(((size_t) realmem_map +
(pagesize - 1)) & ~(pagesize - 1));
if (__djgpp_map_physical_memory(realmem_map_aligned, ONE_MEGABYTE, 0)) {
free(realmem_map);
realmem_map = NULL;
realmem_map_aligned = NULL;
return ERROR_PTR;
}
return realmem_map + phys_addr;
return realmem_map_aligned + phys_addr;
}
static void *sys_physmap(uintptr_t phys_addr, size_t len)
@ -72,7 +83,7 @@ static void *sys_physmap(uintptr_t phys_addr, size_t len)
if (!__djgpp_nearptr_enable())
return ERROR_PTR;
if ((phys_addr + len - 1) < (1024 * 1024)) {
if ((phys_addr + len - 1) < ONE_MEGABYTE) {
/* We need to use another method to map first 1MB. */
return map_first_meg(phys_addr, len);
}
@ -97,8 +108,8 @@ void sys_physunmap_unaligned(void *virt_addr, size_t len)
/* There is no known way to unmap the first 1 MB. The DPMI server will
* do this for us on exit.
*/
if ((virt_addr >= realmem_map) &&
((virt_addr + len) <= (realmem_map + (1024 * 1024)))) {
if ((virt_addr >= realmem_map_aligned) &&
((virt_addr + len) <= (realmem_map_aligned + ONE_MEGABYTE))) {
return;
}