diff options
| author | York Sun <yorksun@freescale.com> | 2012-05-07 07:26:45 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-07-06 17:30:33 -0500 |
| commit | 1e9ea85f7dffe949ca5e4845e6336810c144e06d (patch) | |
| tree | b0dd4cf4a6f7cb05031c67242660fcfac0af8fcb | |
| parent | 7b6e80538b919c814c94ce8887cec7b892f98a71 (diff) | |
powerpc/P4080: Check SVR for CPU22 workaround
Workaround for erratum CPU22 applies to P4080 rev 1 and rev 2 only.
Signed-off-by: York Sun <yorksun@freescale.com>
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init.c | 8 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/release.S | 8 |
3 files changed, 15 insertions, 4 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 2ed5a9842..d7a62e9c7 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -51,7 +51,8 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) puts("Work-around for Erratum SERDES-A005 enabled\n"); #endif #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) - puts("Work-around for Erratum CPU22 enabled\n"); + if (SVR_MAJ(svr) < 3) + puts("Work-around for Erratum CPU22 enabled\n"); #endif #if defined(CONFIG_SYS_FSL_ERRATUM_CPU_A003999) puts("Work-around for Erratum CPU-A003999 enabled\n"); diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index e7b2d3779..b64eda3eb 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -309,9 +309,11 @@ int cpu_init_r(void) #endif #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) - flush_dcache(); - mtspr(L1CSR2, (mfspr(L1CSR2) | L1CSR2_DCWS)); - sync(); + if (SVR_MAJ(svr) < 3) { + flush_dcache(); + mtspr(L1CSR2, (mfspr(L1CSR2) | L1CSR2_DCWS)); + sync(); + } #endif puts ("L2: "); diff --git a/arch/powerpc/cpu/mpc85xx/release.S b/arch/powerpc/cpu/mpc85xx/release.S index c81e19c0e..fe3b6d6cb 100644 --- a/arch/powerpc/cpu/mpc85xx/release.S +++ b/arch/powerpc/cpu/mpc85xx/release.S @@ -144,9 +144,17 @@ __secondary_start_page: #endif #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) + /* apply to P4080 rev 1 and rev 2 */ + mfspr r3,SPRN_SVR + rlwinm r3,r3,0,0xf0 + li r4,0x30 + cmpw r3,r4 + bge 2f + mfspr r8,L1CSR2 oris r8,r8,(L1CSR2_DCWS)@h mtspr L1CSR2,r8 +2: #endif #ifdef CONFIG_BACKSIDE_L2_CACHE |