From 1e0d51a6c4cdd22a75abbdf392484c66ff8a91ea Mon Sep 17 00:00:00 2001 From: York Sun Date: Tue, 17 Oct 2017 08:00:21 -0700 Subject: [PATCH] powerpc: mpc85xx: Implement CPU erratum A-007907 for secondary cores Commit 06ad970b53a3 ("powerpc: mpc85xx: Implemente workaround for CPU erratum A-007907") clears L1CSR2 for the boot core, but other cores don't run through the workaround. Add similar code for secondary cores to clear DCSTASHID field in L1CSR2 register. Signed-off-by: York Sun --- arch/powerpc/cpu/mpc85xx/release.S | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/cpu/mpc85xx/release.S b/arch/powerpc/cpu/mpc85xx/release.S index 0e0daf5..e1f1208 100644 --- a/arch/powerpc/cpu/mpc85xx/release.S +++ b/arch/powerpc/cpu/mpc85xx/release.S @@ -184,12 +184,18 @@ __secondary_start_page: mtspr SPRN_PIR,r4 /* write to PIR register */ +#ifdef CONFIG_SYS_FSL_ERRATUM_A007907 + mfspr r8, L1CSR2 + clrrwi r8, r8, 10 /* clear bit [54-63] DCSTASHID */ + mtspr L1CSR2, r8 +#else #ifdef CONFIG_SYS_CACHE_STASHING /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */ slwi r8,r4,1 addi r8,r8,32 mtspr L1CSR2,r8 #endif +#endif /* CONFIG_SYS_FSL_ERRATUM_A007907 */ #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) || \ defined(CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011)