diff options
| author | Jonas Gorski <jogo@openwrt.org> | 2014-04-05 18:32:34 +0000 |
|---|---|---|
| committer | Jonas Gorski <jogo@openwrt.org> | 2014-04-05 18:32:34 +0000 |
| commit | 663083d930549e783e5e992b233409929ffd2353 (patch) | |
| tree | 091178d72cd1b8b4e465aeffc2700609c1c04cd8 /target/linux | |
| parent | 6d3672b13bebd89a4639bf7f4079c90d81c29d31 (diff) | |
| download | upstream-663083d930549e783e5e992b233409929ffd2353.tar.gz upstream-663083d930549e783e5e992b233409929ffd2353.tar.bz2 upstream-663083d930549e783e5e992b233409929ffd2353.zip | |
brcm63xx: sync mips counters during bringup of cpus
Fixes gettimeofday returning different values depending on which cpu
it is called.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 40387
Diffstat (limited to 'target/linux')
4 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/config-3.10 b/target/linux/brcm63xx/config-3.10 index ab022aec77..725a827a10 100644 --- a/target/linux/brcm63xx/config-3.10 +++ b/target/linux/brcm63xx/config-3.10 @@ -172,6 +172,7 @@ CONFIG_SSB_PCIHOST_POSSIBLE=y CONFIG_SSB_SPROM=y CONFIG_SWAP_IO_SPACE=y CONFIG_SWCONFIG=y +CONFIG_SYNC_R4K=y CONFIG_SYS_HAS_CPU_BMIPS=y CONFIG_SYS_HAS_CPU_BMIPS32_3300=y CONFIG_SYS_HAS_CPU_BMIPS4350=y diff --git a/target/linux/brcm63xx/config-3.14 b/target/linux/brcm63xx/config-3.14 index 2ab663ef15..9a044ec743 100644 --- a/target/linux/brcm63xx/config-3.14 +++ b/target/linux/brcm63xx/config-3.14 @@ -181,6 +181,7 @@ CONFIG_SSB_PCIHOST_POSSIBLE=y CONFIG_SSB_SPROM=y CONFIG_SWAP_IO_SPACE=y CONFIG_SWCONFIG=y +CONFIG_SYNC_R4K=y CONFIG_SYS_HAS_CPU_BMIPS=y CONFIG_SYS_HAS_CPU_BMIPS32_3300=y CONFIG_SYS_HAS_CPU_BMIPS4350=y diff --git a/target/linux/brcm63xx/patches-3.10/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch b/target/linux/brcm63xx/patches-3.10/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch new file mode 100644 index 0000000000..21fffb38b0 --- /dev/null +++ b/target/linux/brcm63xx/patches-3.10/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch @@ -0,0 +1,27 @@ +From 23c21090f49a64b532755542a71e9aa3e4fc84d9 Mon Sep 17 00:00:00 2001 +From: Jonas Gorski <jogo@openwrt.org> +Date: Sat, 5 Apr 2014 20:07:25 +0200 +Subject: [PATCH] MIPS: BCM63XX: sync mips counter during cpu bringup + +We are using the mips counters as the clock source, so we need to ensure +they are synced, else e.g. gettimeofday will return different values +depending on which core it was run. + +Observed difference was about 8 seconds, causing ~8 seconds ping or time +running backwards for some programs. + +Signed-off-by: Jonas Gorski <jogo@openwrt.org> +--- + arch/mips/Kconfig | 1 + + 1 file changed, 1 insertion(+) + +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -127,6 +127,7 @@ config BCM63XX + select BOOT_RAW + select CEVT_R4K + select CSRC_R4K ++ select SYNC_R4K + select DMA_NONCOHERENT + select IRQ_CPU + select NR_CPUS_DEFAULT_2 diff --git a/target/linux/brcm63xx/patches-3.14/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch b/target/linux/brcm63xx/patches-3.14/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch new file mode 100644 index 0000000000..f303c6173b --- /dev/null +++ b/target/linux/brcm63xx/patches-3.14/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch @@ -0,0 +1,27 @@ +From 23c21090f49a64b532755542a71e9aa3e4fc84d9 Mon Sep 17 00:00:00 2001 +From: Jonas Gorski <jogo@openwrt.org> +Date: Sat, 5 Apr 2014 20:07:25 +0200 +Subject: [PATCH] MIPS: BCM63XX: sync mips counter during cpu bringup + +We are using the mips counters as the clock source, so we need to ensure +they are synced, else e.g. gettimeofday will return different values +depending on which core it was run. + +Observed difference was about 8 seconds, causing ~8 seconds ping or time +running backwards for some programs. + +Signed-off-by: Jonas Gorski <jogo@openwrt.org> +--- + arch/mips/Kconfig | 1 + + 1 file changed, 1 insertion(+) + +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -132,6 +132,7 @@ config BCM63XX + select BOOT_RAW + select CEVT_R4K + select CSRC_R4K ++ select SYNC_R4K + select DMA_NONCOHERENT + select IRQ_CPU + select SYS_SUPPORTS_32BIT_KERNEL |