From e7792e3b8352526134e27cac0e1c5f79ad3b8a29 Mon Sep 17 00:00:00 2001 From: Rudolf Marek Date: Fri, 29 Dec 2017 16:30:49 +0100 Subject: Fix the documentation and DOS port Update the DOS cross-compile documentation, and workaround issue with valloc() with the latest DJGPP. Change-Id: I909c5635aec5076440d2fde73d943f8ad10b8051 Signed-off-by: Rudolf Marek Reviewed-on: https://review.coreboot.org/23044 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber --- README | 48 ++++++++++++++++++++++++++++++++---------------- physmap.c | 31 +++++++++++++++++++++---------- 2 files changed, 53 insertions(+), 26 deletions(-) diff --git a/README b/README index 449103d29..b5ed94602 100644 --- a/README +++ b/README @@ -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. diff --git a/physmap.c b/physmap.c index a261ccd51..3338b6209 100644 --- a/physmap.c +++ b/physmap.c @@ -38,29 +38,40 @@ #ifdef __DJGPP__ #include +#include #include +#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; } -- cgit v1.2.3