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2011-04-13x86: Rename i386 to x86Graeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-04-13x86: Code cleanupGraeme Russ
Make the copyright notices in the x86 files consistent and update them with proper attributions for recent updates Also fix a few comment style/accuracy and whitespace/blank line issues Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-02-12x86: Convert board_init_f to use an init_sequenceGraeme Russ
2011-02-12x86: Rearrange function calls in board_init_fGraeme Russ
2011-02-12x86: Split board_init_f() into init_fnc_t compatible functionsGraeme Russ
2011-02-12x86: Fix incorrect usage of relocation offsetGraeme Russ
x86 has always used relocation offset in the opposite sense to the ELF standard - Fix this
2011-02-12x86: Move console initialisation into board_init_fGraeme Russ
2011-02-12x86: Move test for cold boot into init functionsGraeme Russ
2011-02-12x86: Move call to dram_init_f into board_init_fGraeme Russ
2011-02-12x86: Defer setup of final stackGraeme Russ
2011-02-12sc520: Move RAM sizing code from asm to CGraeme Russ
2011-02-12x86: Move initial gd to fixed locationGraeme Russ
2011-02-12x86: Fix mangled umlautsGraeme Russ
git mergetool has a nasty habit of mangling umlats - fix ones that have been missed in previous submissions
2010-10-18Rename TEXT_BASE into CONFIG_SYS_TEXT_BASEWolfgang Denk
The change is currently needed to be able to remove the board configuration scripting from the top level Makefile and replace it by a simple, table driven script. Moving this configuration setting into the "CONFIG_*" name space is also desirable because it is needed if we ever should move forward to a Kconfig driven configuration system. Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-10-07x86: Implement fully relocatable imageGraeme Russ
u-boot.bin can be loaded at any 4-byte aligned memory location and directly 'jumped' to using the 'go' command using the load address as the start address. Doing so performs a 'warm boot' which skips memory initialisation and other low-level initialisations, relocates U-Boot to upper memory and starts U-Boot in RAM as per normal 'cold boot'
2010-10-07x86: Use loops instead of memcpy/memset in board_init_fGraeme Russ
Provides a small speed increase and prepares for fully relocatable image. Downside is the TEXT_BASE, bss, load address etc must ALL be aligned on a a 4-byte boundary which is not such a terrible restriction as everything is already 4-byte aligned anyway
2010-10-07x86: Rearrange linker scriptGraeme Russ
Tidy up the linker script and discard some sections to save space
2010-10-07x86: Rename linker script symbolsGraeme Russ
Create more generic names for the symbols exported from the linker script
2010-10-07x86: Place global data below stack before entering CGraeme Russ
By reserving space for the Global Data immediately below the stack during assembly level initialisation, the C declaration of the static global data can be removed, along with the 'RAM Bootstrap' function. This results in cleaner code, and the ability to pass boot-up flags from assembler into C
2010-09-23Remove unused CONFIG_SERIAL_SOFTWARE_FIFO featureStefan Roese
This patch removes the completely unused CONFIG_SERIAL_SOFTWARE_FIFO feature from U-Boot. It has only been implemented for PPC4xx and was not used at all. So let's remove it and make the code smaller and cleaner. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Detlev Zundel <dzu@denx.de>
2010-09-13x86: Fix do_go_exec() - const argv[]Graeme Russ
Commit 54841ab50c20d6fa6c9cc3eb826989da3a22d934 made the argv parameter to do_go_exec() const but did not allow for the fact that argv[-1] is set to point to the global data structure and relies on argv being non- const. With this patch, do_go_exec() creates a new copy of the argv array with an extra element to store global data pointer rather than simply clobbering an arbitrary memory location.
2010-08-04Rename getenv_r() into getenv_f()Wolfgang Denk
While running from flash, i. e. before relocation, we have only a limited C runtime environment without writable data segment. In this phase, some configurations (for example with environment in EEPROM) must not use the normal getenv(), but a special function. This function had been called getenv_r(), with the idea that the "_r" suffix would mean the same as in the _r_eentrant versions of some of the C library functions (for example getdate vs. getdate_r, getgrent vs. getgrent_r, etc.). Unfortunately this was a misleading name, as in U-Boot the "_r" generally means "running from RAM", i. e. _after_ relocation. To avoid confusion, rename into getenv_f() [as "running from flash"] Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Detlev Zundel <dzu@denx.de>
2010-07-04Make sure that argv[] argument pointers are not modified.Wolfgang Denk
The hush shell dynamically allocates (and re-allocates) memory for the argument strings in the "char *argv[]" argument vector passed to commands. Any code that modifies these pointers will cause serious corruption of the malloc data structures and crash U-Boot, so make sure the compiler can check that no such modifications are being done by changing the code into "char * const argv[]". This modification is the result of debugging a strange crash caused after adding a new command, which used the following argument processing code which has been working perfectly fine in all Unix systems since version 6 - but not so in U-Boot: int main (int argc, char **argv) { while (--argc > 0 && **++argv == '-') { /* ====> */ while (*++*argv) { switch (**argv) { case 'd': debug++; break; ... default: usage (); } } } ... } The line marked "====>" will corrupt the malloc data structures and usually cause U-Boot to crash when the next command gets executed by the shell. With the modification, the compiler will prevent this with an error: increment of read-only location '*argv' N.B.: The code above can be trivially rewritten like this: while (--argc > 0 && **++argv == '-') { char *arg = *argv; while (*++arg) { switch (*arg) { ... Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Mike Frysinger <vapier@gentoo.org>
2010-05-06x86: Provide weak PC/AT compatibility setup functionGraeme Russ
It is possibly to setup x86 boards to use non-PC/AT configurations. For example, the sc520 is an x86 CPU with PC/AT and non-PC/AT peripherals. This function allows the board to set itself up for maximum PC/AT compatibility just before booting the Linux kernel (the Linux kernel 'just works' if everything is PC/AT compliant) Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2010-05-06x86: Use CONFIG_SERIAL_MULTIGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2010-05-06x86: Pass relocation offset into Global DataGraeme Russ
In order to locate the 16-bit BIOS code, we need to know the reloaction offset. Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2010-05-06x86: Fix do_go_exec()Graeme Russ
This was broken a long time ago by a49864593e083a5d0779fb9ca98e5a0f2053183d which munged the NIOS and x86 do_go_exec() Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2010-05-06x86: #ifdef out getenv_IPaddr()Graeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2010-04-13Move lib_$ARCH directories to arch/$ARCH/libPeter Tyser
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk This change is intended to clean up the top-level directory structure and more closely mimic Linux's directory organization. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>