u-boot/arch/arm/cpu/armv7/ls102xa
Alison Wang a1399534f1 arm: ls1021a: Ensure Generic Timer disabled before jumping into the OS
This patch addresses a problem mentioned recently on this mailing list:
[1].

In that posting a LS1021 based system was locking up at about 5 minutes
after boot,but the problem was mysteriously related to the toolchain
used for building u-boot.Debugging the problem reveals a stuck
interrupt 29 on the GIC.

It appears Freescale's LS1021 support in u-boot erroneously sets the
64-bit ARM generic PL1 physical time CompareValue register to all-ones
with a 32-bit value.This causes the timer compare to fire 344 seconds
after u-boot configures it.Depending on how fast u-boot gets the
kernel booted,this amounts to about 5-minutes of Linux uptime before
locking up.

Apparently the bug is masked by some toolchains. Perhaps this is
explained by default compiler options, word sizes, or binutils versions.

To fix the above issue, the generic physical timer is disabled
before jumping to the OS.

[1]
https://lists.yoctoproject.org/pipermail/meta-freescale/2015-June/014400.html

Signed-off-by: Chris Kilgour <techie@whiterocker.com>
Signed-off-by: Alison Wang <alison.wang@freescale.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: York Sun <yorksun@freescale.com>
2015-11-30 08:53:01 -08:00
..
clock.c driver/ifc: Add 64KB page support 2015-04-23 16:46:50 -07:00
cpu.c arm: ls1021a: Ensure Generic Timer disabled before jumping into the OS 2015-11-30 08:53:01 -08:00
fdt.c ls102xa: fdt: Disable IFC in SD boot for QSPI 2015-10-29 10:33:56 -07:00
fsl_epu.c arm: ls102xa: clear EPU registers for deep sleep 2014-12-11 09:35:42 -08:00
fsl_epu.h arm: ls102xa: clear EPU registers for deep sleep 2014-12-11 09:35:42 -08:00
fsl_ls1_serdes.c arm: ls102xa: Add Freescale LS102xA SoC support 2014-09-08 10:30:32 -07:00
fsl_ls1_serdes.h arm: ls102xa: Add Freescale LS102xA SoC support 2014-09-08 10:30:32 -07:00
ls102xa_sata.c arm: ls1021a: Add sata support on qds and twr board 2015-10-29 10:34:02 -07:00
ls102xa_serdes.c arm: ls102xa: Add Freescale LS102xA SoC support 2014-09-08 10:30:32 -07:00
Makefile arm: ls1021a: Add sata support on qds and twr board 2015-10-29 10:34:02 -07:00
psci.S arm/ls102xa: Add PSCI support for ls102xa 2015-07-20 11:44:38 -07:00
spl.c arm: ls102xa: Add SD boot support for LS1021AQDS board 2014-12-11 09:39:22 -08:00
timer.c arm: ls1021a: Ensure LS1021 ARM Generic Timer CompareValue Set 64-bit 2015-11-30 08:53:01 -08:00