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Fix the documentation and DOS port

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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
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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: Get packages of the DJGPP cross compiler and install them:
djgpp-filesystem djgpp-gcc djgpp-cpp djgpp-runtime djgpp-binutils djgpp-filesystem djgpp-gcc djgpp-cpp djgpp-runtime djgpp-binutils
As an alternative, the DJGPP web site offers packages for download as well: As an alternative, the DJGPP web site offers packages for download as well:
djcross-binutils-2.19.1-10ap.i386.rpm djcross-binutils-2.29.1-1ap.x86_64.rpm
djcross-gcc-4.3.2-8ap.i686.rpm djcross-gcc-7.2.0-1ap.x86_64.rpm
djcrx-2.04pre_20090725-13ap.i386.rpm djcrx-2.05-5.x86_64.rpm
The cross toolchain packages for your distribution may have slightly different The cross toolchain packages for your distribution may have slightly different
names (look for packages named *djgpp*). names (look for packages named *djgpp*).
You will need the following library source trees containing their compiled Alternatively, you could use a script to build it from scratch:
static libraries either in the parent directory of the flashrom source or https://github.com/andrewwutw/build-djgpp
specify the base folder on compile time with the LIBS_BASE parameter.
The default as described above is equal to calling You will need the libpci and libgetopt library source trees and
'make djgpp-dos LIBS_BASE=..' 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. Enter the flashrom directory.
Run either (change settings where appropriate)
make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip LIBS_BASE=../libpci-libgetopt/ strip
or (above settings hardcoded)
make djgpp-dos 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 To run flashrom.exe, download http://flashrom.org/File:Csdpmi7b.zip and
unpack CWSDPMI.EXE into the current directory or one in PATH. unpack CWSDPMI.EXE into the current directory or one in PATH.

31
physmap.c
View File

@ -38,29 +38,40 @@
#ifdef __DJGPP__ #ifdef __DJGPP__
#include <dpmi.h> #include <dpmi.h>
#include <malloc.h>
#include <sys/nearptr.h> #include <sys/nearptr.h>
#define ONE_MEGABYTE (1024 * 1024)
#define MEM_DEV "dpmi" #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) static void *map_first_meg(uintptr_t phys_addr, size_t len)
{ {
if (realmem_map) void *realmem_map;
return realmem_map + phys_addr; 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) if (!realmem_map)
return ERROR_PTR; 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); free(realmem_map);
realmem_map = NULL; realmem_map_aligned = NULL;
return ERROR_PTR; 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) 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()) if (!__djgpp_nearptr_enable())
return ERROR_PTR; 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. */ /* We need to use another method to map first 1MB. */
return map_first_meg(phys_addr, len); 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 /* There is no known way to unmap the first 1 MB. The DPMI server will
* do this for us on exit. * do this for us on exit.
*/ */
if ((virt_addr >= realmem_map) && if ((virt_addr >= realmem_map_aligned) &&
((virt_addr + len) <= (realmem_map + (1024 * 1024)))) { ((virt_addr + len) <= (realmem_map_aligned + ONE_MEGABYTE))) {
return; return;
} }