From: Fabio Estevam fabio.estevam@freescale.com

Currently the following kernel hang happens when loading a 2.6.35 kernel from Freeescale on a mx28evk board:

RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. Bus freq driver module loaded IMX usb wakeup probe usb h1 wakeup device is registered mxs_cpu_init: cpufreq init finished ...

Loading the same kernel using the bootlets from the imx-bootlets-src-10.12.01 package, the hang does not occur.

Comparing the DDR2 initialization from the bootlets code against the U-boot one, we can notice some mismatches, and after applying the same initialization into U-boot the 2.6.35 kernel can boot normally.

Also tested with 'mtest' command, which runs succesfully.

Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 87 ++++++++++++++--------------- 1 file changed, 43 insertions(+), 44 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c index f8392f6..d80746f 100644 --- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c +++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c @@ -36,55 +36,54 @@ static uint32_t dram_vals[] = { * i.MX28 DDR2 at 200MHz */ #if defined(CONFIG_MX28) - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000100, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00010101, 0x01010101, - 0x000f0f01, 0x0f02020a, 0x00000000, 0x00010101, - 0x00000100, 0x00000100, 0x00000000, 0x00000002, - 0x01010000, 0x05060302, 0x06005003, 0x0a0000c8, - 0x02009c40, 0x0000030c, 0x0036a609, 0x031a0612, - 0x02030202, 0x00c8001c, 0x00000000, 0x00000000, - 0x00012100, 0xffff0303, 0x00012100, 0xffff0303, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000100, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00010101, 0x01010101, + 0x000f0f01, 0x0f02020a, 0x00000000, 0x00010101, + 0x00000100, 0x00000100, 0x00000000, 0x00000002, + 0x01010000, 0x07080403, 0x06005003, 0x0a0000c8, + 0x02009c40, 0x0002030c, 0x0036a609, 0x031a0612, + 0x02030202, 0x00c8001c, 0x00000000, 0x00000000, + 0x00012100, 0xffff0303, 0x00012100, 0xffff0303, 0x00012100, 0xffff0303, 0x00012100, 0xffff0303, - 0x00000003, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000612, 0x01000F02, - 0x06120612, 0x00000200, 0x00020007, 0xf5014b27, - 0xf5014b27, 0xf5014b27, 0xf5014b27, 0x07000300, - 0x07000300, 0x07000300, 0x07000300, 0x00000006, - 0x00000000, 0x00000000, 0x01000000, 0x01020408, - 0x08040201, 0x000f1133, 0x00000000, 0x00001f04, - 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, + 0x00000003, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000612, 0x01000f02, + 0x06120612, 0x00000200, 0x00020007, 0xf4004a27, + 0xf4004a27, 0xf4004a27, 0xf4004a27, 0x07000300, + 0x07000300, 0x07400300, 0x07400300, 0x00000005, + 0x00000000, 0x00000000, 0x01000000, 0x01020408, + 0x08040201, 0x000f1133, 0x00000000, 0x00001f04, + 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00010000, 0x00020304, - 0x00000004, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x01010000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00010000, 0x00030404, + 0x00000003, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x01010000, 0x01000000, 0x03030000, 0x00010303, 0x01020202, - 0x00000000, 0x02040303, 0x21002103, 0x00061200, - 0x06120612, 0x04320432, 0x04320432, 0x00040004, + 0x00000000, 0x02040303, 0x21002103, 0x00061200, + 0x06120612, 0x04420442, 0x04420442, 0x00040004, 0x00040004, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00010001 - + 0x00000000, 0xffffffff /* * i.MX23 DDR at 133MHz */