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| author | Jan Luebbe <jlu@pengutronix.de> | 2012-09-24 10:18:34 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-09-27 19:30:04 +0200 |
| commit | faf7b7af6e51a33b88453821d792c89a84f72b1d (patch) | |
| tree | bff70e6a71339e4d62e90c23ead1fc351effc89a /arch/arm/boards/at91sam9260ek | |
| parent | cc1602604d1654991f3ce02b664178b3e672afe7 (diff) | |
| download | barebox-faf7b7af6e51a33b88453821d792c89a84f72b1d.tar.gz barebox-faf7b7af6e51a33b88453821d792c89a84f72b1d.tar.xz | |
ARM: give boards control of the reset entry point
On some SoCs (for example AM35xx), the ROM bootloader passes useful
information in r0 when jumping to barebox.
To avoid overwriting this in the generic reset code, we introduce
common_reset as a C function and as an assembler macro. This is then
called form the reset entry point (either in common or in board code).
This patch is based on code by Sascha Hauer <s.hauer@pengutronix.de>.
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/boards/at91sam9260ek')
| -rw-r--r-- | arch/arm/boards/at91sam9260ek/lowlevel_init.S | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm/boards/at91sam9260ek/lowlevel_init.S b/arch/arm/boards/at91sam9260ek/lowlevel_init.S index 4961682322..7d51b7bfe7 100644 --- a/arch/arm/boards/at91sam9260ek/lowlevel_init.S +++ b/arch/arm/boards/at91sam9260ek/lowlevel_init.S @@ -21,6 +21,9 @@ * MA 02111-1307 USA */ -.globl board_init_lowlevel -board_init_lowlevel: - mov pc, lr +#include <asm/barebox-arm-head.h> + +.globl reset +reset: + common_reset r0 + b board_init_lowlevel_return |