Commit graph

167 commits

Author SHA1 Message Date
Thomas Chou
6db6c18b50 nios2: add gpio_request
This will be used by nand_plat.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
2010-07-12 11:30:51 -04:00
Thomas Chou
06c5d30dc3 nios2: add fdt support
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>
2010-07-12 11:30:51 -04:00
Thomas Chou
cb2da50f0f nios2: use gc sections to reduce image size
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>
2010-07-12 11:30:51 -04:00
Wolfgang Denk
54841ab50c Make sure that argv[] argument pointers are not modified.
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>
2010-07-04 23:55:42 +02:00
Thomas Chou
6803336c9f nios2: allow STANDALONE_LOAD_ADDR overriding
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>
2010-05-28 10:56:04 -04:00
Thomas Chou
8d52ea6db4 nios2: fix div64 issue for gcc4
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>
2010-05-28 10:56:03 -04:00
Thomas Chou
0df01fd3d7 nios2: fix r15 issue for gcc4
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>
2010-05-28 10:56:03 -04:00
Thomas Chou
cedd341d55 nios2: add gpio support
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>
2010-05-28 10:56:03 -04:00
Thomas Chou
441cac10d8 nios2: fix no flash, add nand and mmc init in board.c
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>
2010-04-24 18:21:23 -04:00
Thomas Chou
fd2712d0b1 nios2: consolidate reset initialization
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>
2010-04-24 18:21:23 -04:00
Thomas Chou
7e812f2e9c nios2: add dma_alloc_coherent
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>
2010-04-24 18:21:22 -04:00
Thomas Chou
0dc1c7f692 nios2: add 64 bits swab support
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>
2010-04-24 18:21:22 -04:00
Thomas Chou
dd168ef5b8 nios2: allow link script overriding from boards
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>
2010-04-24 18:21:22 -04:00
Scott McNutt
254ab7bd46 nios2: Move individual board linker scripts to common script in cpu tree.
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
2010-04-16 16:12:39 -04:00
Peter Tyser
37e4dafaae nios2: Move cpu/nios2/* to arch/nios2/cpu/*
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2010-04-13 09:13:27 +02:00
Peter Tyser
819833af39 Move architecture-specific includes to arch/$ARCH/include/asm
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>
2010-04-13 09:13:12 +02:00
Peter Tyser
ea0364f1bb Move lib_$ARCH directories to arch/$ARCH/lib
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>
2010-04-13 09:13:03 +02:00