- n = getprop(muram, "reg", &muram_offset, 4);
- if (n < 4)
- return -1;
+ /* Store the buffer descriptors at the end of the first muram chunk.
+ * For SMC ports on CPM2-based platforms, relocate the parameter RAM
+ * just before the buffer descriptors.
+ */
+
+ cbd_offset = muram_offset + muram_size - 2 * sizeof(struct cpm_bd);
+
+ if (is_cpm2 && is_smc) {
+ u16 *smc_base = (u16 *)param;
+ u16 pram_offset;
+
+ pram_offset = cbd_offset - 64;
+ pram_offset = _ALIGN_DOWN(pram_offset, 64);
+
+ disable_port();
+ out_be16(smc_base, pram_offset);
+ param = muram_addr - muram_offset + pram_offset;
+ }
+
+ cbd_addr = muram_addr - muram_offset + cbd_offset;