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* nios2: fix bootm error on fdt argsThomas Chou2010-08-19-1/+1
| | | | | | | | We should check argv[3] only if there are enough args. Otherwise, it might cause invalid memory access fault. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: add gpio_requestThomas Chou2010-07-12-0/+6
| | | | | | | This will be used by nand_plat. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: add fdt supportThomas Chou2010-07-12-0/+21
| | | | | | | | This patch adds fdt support to boot linux, followed Michal's work on microblaze. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: use gc sections to reduce image sizeThomas Chou2010-07-12-0/+3
| | | | | | | | | | | | | | | | Follow the discussion of Charles Manning and Mike Frysinger. Using gc_sections helps reduce image size. Configuring for nios2-generic board... Before, text data bss dec hex filename 123979 3724 22892 150595 24c43 /tmp/u-boot/u-boot After, text data bss dec hex filename 115983 3800 22732 142515 22cb3 /tmp/u-boot/u-boot Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* Make sure that argv[] argument pointers are not modified.Wolfgang Denk2010-07-04-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* nios2: allow STANDALONE_LOAD_ADDR overridingThomas Chou2010-05-28-1/+1
| | | | | | | | | This patch allows users to override default STANDALONE_LOAD_ADDR. The gcclibdir path was duplicated in the standalone Makefile and can be removed. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: fix div64 issue for gcc4Thomas Chou2010-05-28-175/+856
| | | | | | | | | | | | | This patch fixes the run-time error on div64 when built with gcc4, which was reported by jhwu0625 on nios forum. It merges math support from libgcc of gcc4. This patch is copied from nios2-linux. It works with both gcc3 and gcc4. The old mult.c, divmod.c and math.h are removed. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: fix r15 issue for gcc4Thomas Chou2010-05-28-9/+2
| | | | | | | | | | The "-ffixed-r15" option doesn't work well for gcc4. Since we don't use gp for small data with option "-G0", we can use gp as global data pointer. This allows compiler to use r15. It is necessary for gcc4 to work properly. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: add gpio supportThomas Chou2010-05-28-0/+52
| | | | | | | | | | | | | This patch adds driver for a trivial gpio core, which is described in http://nioswiki.com/GPIO. It is used for gpio led and nand flash interface in u-boot. When CONFIG_SYS_GPIO_BASE is not defined, board may provide its own driver. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Tested-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: fix no flash, add nand and mmc init in board.cThomas Chou2010-04-24-0/+18
| | | | | | | | | This patch fixes error when CONFIG_SYS_NO_FLASH. And adds nand flash and mmc initialization, which should go before env initialization. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: consolidate reset initializationThomas Chou2010-04-24-5/+4
| | | | | | | Global interrupt should be disabled from the beginning. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: add dma_alloc_coherentThomas Chou2010-04-24-0/+23
| | | | | | | | This function return cache-line aligned allocation which is mapped to uncached io region. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: add 64 bits swab supportThomas Chou2010-04-24-0/+6
| | | | | | | | This patch adds 64 bits swab support. Most 32 bits processors use this. We need 64 bits swab for UBI. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: allow link script overriding from boardsThomas Chou2010-04-24-1/+1
| | | | | | | This patch allow boards to override the default link script. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: Move individual board linker scripts to common script in cpu tree.Scott McNutt2010-04-16-0/+137
| | | | Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* nios2: Move cpu/nios2/* to arch/nios2/cpu/*Peter Tyser2010-04-13-0/+1592
| | | | Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* Move architecture-specific includes to arch/$ARCH/include/asmPeter Tyser2010-04-13-0/+1172
| | | | | | | | This helps to clean up the include/ directory so that it only contains non-architecture-specific headers and also matches Linux's directory layout which many U-Boot developers are already familiar with. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* Move lib_$ARCH directories to arch/$ARCH/libPeter Tyser2010-04-13-0/+580
Also move lib_$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>
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