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powerpc/mpc8xxx: fix workaround for errata DDR111 and DDR134

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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>
This commit is contained in:
York Sun 2011-03-17 11:18:13 -07:00 committed by Kumar Gala
parent 4ca3192946
commit eb672e92f4
1 changed files with 41 additions and 0 deletions
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41
arch/powerpc/cpu/mpc85xx/ddr-gen3.c
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@ -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 *) &regs->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 *) &regs->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 */
}