diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/npu.c | 20 |
1 files changed, 13 insertions, 7 deletions
@@ -1614,14 +1614,20 @@ static void npu_create_devices(struct dt_node *dn, struct npu *p) struct npu_dev *dev; struct dt_node *npu_dn, *link; uint32_t npu_phandle, index = 0; - uint64_t buid; + uint64_t buid_reg; uint64_t lsisrcid; + uint64_t buid; + + + /* The bits in the LSI ID Base register are always compared and + * can be set to 0 in the buid base and mask fields. The + * buid (bus unit id) is the full irq minus the last 4 bits. */ + lsisrcid = GETFIELD(NPU_LSI_SRC_ID_BASE, NPU_LSI_SRC_ID_BASE); + buid = p8_chip_irq_block_base(p->chip_id, P8_IRQ_BLOCK_MISC) >> 4; - lsisrcid = GETFIELD(NPU_LSI_SRC_ID_BASE, - in_be64(p->at_regs + NPU_LSI_SOURCE_ID)); - buid = SETFIELD(NP_BUID_BASE, 0ull, - (p8_chip_irq_block_base(p->chip_id, P8_IRQ_BLOCK_MISC) | lsisrcid)); - buid |= NP_BUID_ENABLE; + buid_reg = SETFIELD(NP_IRQ_LEVELS, NP_BUID_ENABLE, ~0); + buid_reg = SETFIELD(NP_BUID_MASK, buid_reg, ~lsisrcid); + buid_reg = SETFIELD(NP_BUID_BASE, buid_reg, (buid & ~lsisrcid)); /* Get the npu node which has the links which we expand here * into pci like devices attached to our emulated phb. */ @@ -1661,7 +1667,7 @@ static void npu_create_devices(struct dt_node *dn, struct npu *p) dev->lane_mask = dt_prop_get_u32(link, "ibm,npu-lane-mask"); /* Setup BUID/ISRN */ - xscom_write(p->chip_id, dev->xscom + NX_NP_BUID, buid); + xscom_write(p->chip_id, dev->xscom + NX_NP_BUID, buid_reg); /* Setup emulated config space */ for (j = 0; j < NPU_DEV_CFG_MAX; j++) |