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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/eukrea_cpuimx35 | |
| 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/eukrea_cpuimx35')
| -rw-r--r-- | arch/arm/boards/eukrea_cpuimx35/lowlevel.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm/boards/eukrea_cpuimx35/lowlevel.c b/arch/arm/boards/eukrea_cpuimx35/lowlevel.c index 57867dc85b..b8dec71395 100644 --- a/arch/arm/boards/eukrea_cpuimx35/lowlevel.c +++ b/arch/arm/boards/eukrea_cpuimx35/lowlevel.c @@ -29,6 +29,7 @@ #include <io.h> #include <mach/imx-nand.h> #include <asm/barebox-arm.h> +#include <asm/barebox-arm-head.h> #include <asm-generic/sections.h> #include <asm-generic/memory_layout.h> #include <asm/system.h> @@ -59,7 +60,7 @@ static void __bare_init __naked insdram(void) } #endif -void __bare_init __naked board_init_lowlevel(void) +void __bare_init __naked reset(void) { uint32_t r, s; unsigned long ccm_base = IMX_CCM_BASE; @@ -69,6 +70,8 @@ void __bare_init __naked board_init_lowlevel(void) #endif register uint32_t loops = 0x20000; + common_reset(); + r = get_cr(); r |= CR_Z; /* Flow prediction (Z) */ r |= CR_U; /* unaligned accesses */ |