diff options
Diffstat (limited to 'asm')
| -rw-r--r-- | asm/head.S | 25 |
1 files changed, 22 insertions, 3 deletions
@@ -324,6 +324,7 @@ boot_offset: * r28 : PVR * r27 : DTB pointer (or NULL) * r26 : PIR thread mask + * r25 : P9 fused core flag */ .global boot_entry boot_entry: @@ -338,13 +339,22 @@ boot_entry: cmpwi cr0,%r3,PVR_TYPE_P8NVL beq 2f cmpwi cr0,%r3,PVR_TYPE_P9 - beq 1f + beq 3f cmpwi cr0,%r3,PVR_TYPE_P9P - beq 1f + beq 3f attn /* Unsupported CPU type... what do we do ? */ b . /* loop here, just in case attn is disabled */ - /* P8 -> 8 threads */ + /* Check for fused core and set flag */ +3: + li %r3, 0x1e0 + mtspr SPR_SPRC, %r3 + mfspr %r3, SPR_SPRD + andi. %r25, %r3, 1 + beq 1f + + /* P8 or P9 fused -> 8 threads */ + 2: li %r26,7 /* Get our reloc offset into r30 */ @@ -370,6 +380,15 @@ boot_entry: #endif mtmsrd %r3,0 + /* If fused, t1 is primary chiplet and must init shared sprs */ + andi. %r3,%r25,1 + beq not_fused + + mfspr %r31,SPR_PIR + andi. %r3,%r31,1 + bnel init_shared_sprs + +not_fused: /* Check our PIR, avoid threads */ mfspr %r31,SPR_PIR and. %r0,%r31,%r26 |