From: York Sun yorksun@freescale.com
The fix for errata workaround is to avoid covering physical address 0xff000000 to 0xffffffff during the implementation.
Signed-off-by: York Sun yorksun@freescale.com Signed-off-by: Kumar Gala galak@kernel.crashing.org --- arch/powerpc/cpu/mpc85xx/ddr-gen3.c | 41 +++++++++++++++++++++++++++++++++++ 1 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/ddr-gen3.c b/arch/powerpc/cpu/mpc85xx/ddr-gen3.c index 73b320b..c8c84a1 100644 --- a/arch/powerpc/cpu/mpc85xx/ddr-gen3.c +++ b/arch/powerpc/cpu/mpc85xx/ddr-gen3.c @@ -24,6 +24,8 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, #ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134 volatile ccsr_local_ecm_t *ecm = (void *)CONFIG_SYS_MPC85xx_ECM_ADDR; u32 total_gb_size_per_controller; + unsigned int csn_bnds_backup = 0, cs_sa, cs_ea, *csn_bnds_t; + int csn = -1; #endif
switch (ctrl_num) { @@ -40,6 +42,22 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
out_be32(&ddr->eor, regs->ddr_eor);
+#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134 + for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { + cs_sa = (regs->cs[i].bnds >> 16) & 0xfff; + cs_ea = regs->cs[i].bnds & 0xfff; + if ((cs_sa <= 0xff) && (cs_ea >= 0xff)) { + csn = i; + csn_bnds_backup = regs->cs[i].bnds; + csn_bnds_t = (unsigned int *) ®s->cs[i].bnds; + *csn_bnds_t = regs->cs[i].bnds ^ 0x0F000F00; + debug("Found cs%d_bns (0x%08x) covering 0xff000000, " + "change it to 0x%x\n", + csn, csn_bnds_backup, regs->cs[i].bnds); + break; + } + } +#endif for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { if (i == 0) { out_be32(&ddr->cs0_bnds, regs->cs[i].bnds); @@ -308,5 +326,28 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, /* 10. Clear EEBACR[3] */ clrbits_be32(&ecm->eebacr, 10000000); debug("Clearing EEBACR[3] to 0x%08x\n", in_be32(&ecm->eebacr)); + + if (csn != -1) { + csn_bnds_t = (unsigned int *) ®s->cs[csn].bnds; + *csn_bnds_t = csn_bnds_backup; + debug("Change cs%d_bnds back to 0x%08x\n", + csn, regs->cs[csn].bnds); + setbits_be32(&ddr->sdram_cfg, 0x2); /* MEM_HALT */ + switch (csn) { + case 0: + out_be32(&ddr->cs0_bnds, regs->cs[csn].bnds); + break; + case 1: + out_be32(&ddr->cs1_bnds, regs->cs[csn].bnds); + break; + case 2: + out_be32(&ddr->cs2_bnds, regs->cs[csn].bnds); + break; + case 3: + out_be32(&ddr->cs3_bnds, regs->cs[csn].bnds); + break; + } + clrbits_be32(&ddr->sdram_cfg, 0x2); + } #endif /* CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134 */ }