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| author | Praveen Rao <prao@ti.com> | 2015-03-09 17:12:06 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-03-13 09:29:01 -0400 |
| commit | 5f603761c3de00423cad405e064cd2fc822feab1 (patch) | |
| tree | b4a5ed5a564c806d6fbee7f8f93e87cae55f81d2 /arch/arm | |
| parent | 49ec9490918909c9694b8ee64789f1eed335df1b (diff) | |
| download | u-boot-imx-5f603761c3de00423cad405e064cd2fc822feab1.zip u-boot-imx-5f603761c3de00423cad405e064cd2fc822feab1.tar.gz u-boot-imx-5f603761c3de00423cad405e064cd2fc822feab1.tar.bz2 | |
ARM: DRA7 / OMAP5: Add workaround for ARM errata 798870
This patch enables the workaround for ARM errata 798870 for OMAP5 /
DRA7 which says "If back-to-back speculative cache line fills (fill
A and fill B) are issued from the L1 data cache of a CPU to the
L2 cache, the second request (fill B) is then cancelled, and the
second request would have detected a hazard against a recent write or
eviction (write B) to the same cache line as fill B then the L2 logic
might deadlock."
An l2auxctlr accessor implementation for OMAP5 and DRA7 is introduced
here as well.
Signed-off-by: Praveen Rao <prao@ti.com>
Signed-off-by: Angela Stegmaier <angelabaker@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Matt Porter <mporter@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/omap5/hwinit.c | 7 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-omap5/sys_proto.h | 3 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/omap5/hwinit.c b/arch/arm/cpu/armv7/omap5/hwinit.c index a8a474a..f806055 100644 --- a/arch/arm/cpu/armv7/omap5/hwinit.c +++ b/arch/arm/cpu/armv7/omap5/hwinit.c @@ -381,3 +381,10 @@ void setup_warmreset_time(void) rst_val |= rst_time; writel(rst_val, (*prcm)->prm_rsttime); } + +void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr, + u32 cpu_rev_comb, u32 cpu_variant, + u32 cpu_rev) +{ + omap_smc1(OMAP5_SERVICE_L2ACTLR_SET, l2auxctrl); +} diff --git a/arch/arm/include/asm/arch-omap5/sys_proto.h b/arch/arm/include/asm/arch-omap5/sys_proto.h index 1038303..ea84665 100644 --- a/arch/arm/include/asm/arch-omap5/sys_proto.h +++ b/arch/arm/include/asm/arch-omap5/sys_proto.h @@ -66,4 +66,7 @@ static inline u32 usec_to_32k(u32 usec) { return div_round_up(32768 * usec, 1000000); } + +#define OMAP5_SERVICE_L2ACTLR_SET 0x104 + #endif |