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| author | David S. Miller <davem@davemloft.net> | 2013-06-06 02:56:43 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-06 03:37:30 +0400 |
| commit | 6bc19fb82d4c05a9eee19d6d2aab2ce26e499ec2 (patch) | |
| tree | 8b049ef383307f5dae91b5c9cf78dbfb9b74a4d1 /arch/arm/mach-imx/platsmp.c | |
| parent | 11a164a04382d735230b01f4cc46ad78a7c4abf6 (diff) | |
| parent | 4d3797d7e1861ac1af150a6189315786c5e1c820 (diff) | |
| download | linux-6bc19fb82d4c05a9eee19d6d2aab2ce26e499ec2.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Merge 'net' bug fixes into 'net-next' as we have patches
that will build on top of them.
This merge commit includes a change from Emil Goode
(emilgoode@gmail.com) that fixes a warning that would
have been introduced by this merge. Specifically it
fixes the pingv6_ops method ipv6_chk_addr() to add a
"const" to the "struct net_device *dev" argument and
likewise update the dummy_ipv6_chk_addr() declaration.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/arm/mach-imx/platsmp.c')
| -rw-r--r-- | arch/arm/mach-imx/platsmp.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/platsmp.c b/arch/arm/mach-imx/platsmp.c index 4a69305db65e..c6e1ab544882 100644 --- a/arch/arm/mach-imx/platsmp.c +++ b/arch/arm/mach-imx/platsmp.c @@ -12,6 +12,7 @@ #include <linux/init.h> #include <linux/smp.h> +#include <asm/cacheflush.h> #include <asm/page.h> #include <asm/smp_scu.h> #include <asm/mach/map.h> @@ -21,6 +22,7 @@ #define SCU_STANDBY_ENABLE (1 << 5) +u32 g_diag_reg; static void __iomem *scu_base; static struct map_desc scu_io_desc __initdata = { @@ -80,6 +82,18 @@ void imx_smp_prepare(void) static void __init imx_smp_prepare_cpus(unsigned int max_cpus) { imx_smp_prepare(); + + /* + * The diagnostic register holds the errata bits. Mostly bootloader + * does not bring up secondary cores, so that when errata bits are set + * in bootloader, they are set only for boot cpu. But on a SMP + * configuration, it should be equally done on every single core. + * Read the register from boot cpu here, and will replicate it into + * secondary cores when booting them. + */ + asm("mrc p15, 0, %0, c15, c0, 1" : "=r" (g_diag_reg) : : "cc"); + __cpuc_flush_dcache_area(&g_diag_reg, sizeof(g_diag_reg)); + outer_clean_range(__pa(&g_diag_reg), __pa(&g_diag_reg + 1)); } struct smp_operations imx_smp_ops __initdata = { |