| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* sun4v_ivec.S: Sun4v interrupt vector handling. |
| * |
| * Copyright (C) 2006 <davem@davemloft.net> |
| */ |
| |
| #include <asm/cpudata.h> |
| #include <asm/intr_queue.h> |
| #include <asm/pil.h> |
| |
| .text |
| .align 32 |
| |
| sun4v_cpu_mondo: |
| /* Head offset in %g2, tail offset in %g4. |
| * If they are the same, no work. |
| */ |
| mov INTRQ_CPU_MONDO_HEAD, %g2 |
| ldxa [%g2] ASI_QUEUE, %g2 |
| mov INTRQ_CPU_MONDO_TAIL, %g4 |
| ldxa [%g4] ASI_QUEUE, %g4 |
| cmp %g2, %g4 |
| be,pn %xcc, sun4v_cpu_mondo_queue_empty |
| nop |
| |
| /* Get &trap_block[smp_processor_id()] into %g4. */ |
| ldxa [%g0] ASI_SCRATCHPAD, %g4 |
| sub %g4, TRAP_PER_CPU_FAULT_INFO, %g4 |
| |
| /* Get smp_processor_id() into %g3 */ |
| sethi %hi(trap_block), %g5 |
| or %g5, %lo(trap_block), %g5 |
| sub %g4, %g5, %g3 |
| srlx %g3, TRAP_BLOCK_SZ_SHIFT, %g3 |
| |
| /* Increment cpu_mondo_counter[smp_processor_id()] */ |
| sethi %hi(cpu_mondo_counter), %g5 |
| or %g5, %lo(cpu_mondo_counter), %g5 |
| sllx %g3, 3, %g3 |
| add %g5, %g3, %g5 |
| ldx [%g5], %g3 |
| add %g3, 1, %g3 |
| stx %g3, [%g5] |
| |
| /* Get CPU mondo queue base phys address into %g7. */ |
| ldx [%g4 + TRAP_PER_CPU_CPU_MONDO_PA], %g7 |
| |
| /* Now get the cross-call arguments and handler PC, same |
| * layout as sun4u: |
| * |
| * 1st 64-bit word: low half is 32-bit PC, put into %g3 and jmpl to it |
| * high half is context arg to MMU flushes, into %g5 |
| * 2nd 64-bit word: 64-bit arg, load into %g1 |
| * 3rd 64-bit word: 64-bit arg, load into %g7 |
| */ |
| ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g3 |
| add %g2, 0x8, %g2 |
| srlx %g3, 32, %g5 |
| ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g1 |
| add %g2, 0x8, %g2 |
| srl %g3, 0, %g3 |
| ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g7 |
| add %g2, 0x40 - 0x8 - 0x8, %g2 |
| |
| /* Update queue head pointer. */ |
| lduw [%g4 + TRAP_PER_CPU_CPU_MONDO_QMASK], %g4 |
| and %g2, %g4, %g2 |
| |
| mov INTRQ_CPU_MONDO_HEAD, %g4 |
| stxa %g2, [%g4] ASI_QUEUE |
| membar #Sync |
| |
| jmpl %g3, %g0 |
| nop |
| |
| sun4v_cpu_mondo_queue_empty: |
| retry |
| |
| sun4v_dev_mondo: |
| /* Head offset in %g2, tail offset in %g4. */ |
| mov INTRQ_DEVICE_MONDO_HEAD, %g2 |
| ldxa [%g2] ASI_QUEUE, %g2 |
| mov INTRQ_DEVICE_MONDO_TAIL, %g4 |
| ldxa [%g4] ASI_QUEUE, %g4 |
| cmp %g2, %g4 |
| be,pn %xcc, sun4v_dev_mondo_queue_empty |
| nop |
| |
| /* Get &trap_block[smp_processor_id()] into %g4. */ |
| ldxa [%g0] ASI_SCRATCHPAD, %g4 |
| sub %g4, TRAP_PER_CPU_FAULT_INFO, %g4 |
| |
| /* Get DEV mondo queue base phys address into %g5. */ |
| ldx [%g4 + TRAP_PER_CPU_DEV_MONDO_PA], %g5 |
| |
| /* Load IVEC into %g3. */ |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| add %g2, 0x40, %g2 |
| |
| /* XXX There can be a full 64-byte block of data here. |
| * XXX This is how we can get at MSI vector data. |
| * XXX Current we do not capture this, but when we do we'll |
| * XXX need to add a 64-byte storage area in the struct ino_bucket |
| * XXX or the struct irq_desc. |
| */ |
| |
| /* Update queue head pointer, this frees up some registers. */ |
| lduw [%g4 + TRAP_PER_CPU_DEV_MONDO_QMASK], %g4 |
| and %g2, %g4, %g2 |
| |
| mov INTRQ_DEVICE_MONDO_HEAD, %g4 |
| stxa %g2, [%g4] ASI_QUEUE |
| membar #Sync |
| |
| TRAP_LOAD_IRQ_WORK_PA(%g1, %g4) |
| |
| /* For VIRQs, cookie is encoded as ~bucket_phys_addr */ |
| brlz,pt %g3, 1f |
| xnor %g3, %g0, %g4 |
| |
| /* Get __pa(&ivector_table[IVEC]) into %g4. */ |
| sethi %hi(ivector_table_pa), %g4 |
| ldx [%g4 + %lo(ivector_table_pa)], %g4 |
| sllx %g3, 4, %g3 |
| add %g4, %g3, %g4 |
| |
| 1: ldx [%g1], %g2 |
| stxa %g2, [%g4] ASI_PHYS_USE_EC |
| stx %g4, [%g1] |
| |
| /* Signal the interrupt by setting (1 << pil) in %softint. */ |
| wr %g0, 1 << PIL_DEVICE_IRQ, %set_softint |
| |
| sun4v_dev_mondo_queue_empty: |
| retry |
| |
| sun4v_res_mondo: |
| /* Head offset in %g2, tail offset in %g4. */ |
| mov INTRQ_RESUM_MONDO_HEAD, %g2 |
| ldxa [%g2] ASI_QUEUE, %g2 |
| mov INTRQ_RESUM_MONDO_TAIL, %g4 |
| ldxa [%g4] ASI_QUEUE, %g4 |
| cmp %g2, %g4 |
| be,pn %xcc, sun4v_res_mondo_queue_empty |
| nop |
| |
| /* Get &trap_block[smp_processor_id()] into %g3. */ |
| ldxa [%g0] ASI_SCRATCHPAD, %g3 |
| sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3 |
| |
| /* Get RES mondo queue base phys address into %g5. */ |
| ldx [%g3 + TRAP_PER_CPU_RESUM_MONDO_PA], %g5 |
| |
| /* Get RES kernel buffer base phys address into %g7. */ |
| ldx [%g3 + TRAP_PER_CPU_RESUM_KBUF_PA], %g7 |
| |
| /* If the first word is non-zero, queue is full. */ |
| ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g1 |
| brnz,pn %g1, sun4v_res_mondo_queue_full |
| nop |
| |
| lduw [%g3 + TRAP_PER_CPU_RESUM_QMASK], %g4 |
| |
| /* Remember this entry's offset in %g1. */ |
| mov %g2, %g1 |
| |
| /* Copy 64-byte queue entry into kernel buffer. */ |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| |
| /* Update queue head pointer. */ |
| and %g2, %g4, %g2 |
| |
| mov INTRQ_RESUM_MONDO_HEAD, %g4 |
| stxa %g2, [%g4] ASI_QUEUE |
| membar #Sync |
| |
| /* Disable interrupts and save register state so we can call |
| * C code. The etrap handling will leave %g4 in %l4 for us |
| * when it's done. |
| */ |
| rdpr %pil, %g2 |
| wrpr %g0, PIL_NORMAL_MAX, %pil |
| mov %g1, %g4 |
| ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| call trace_hardirqs_off |
| nop |
| #endif |
| /* Log the event. */ |
| add %sp, PTREGS_OFF, %o0 |
| call sun4v_resum_error |
| mov %l4, %o1 |
| |
| /* Return from trap. */ |
| ba,pt %xcc, rtrap_irq |
| nop |
| |
| sun4v_res_mondo_queue_empty: |
| retry |
| |
| sun4v_res_mondo_queue_full: |
| /* The queue is full, consolidate our damage by setting |
| * the head equal to the tail. We'll just trap again otherwise. |
| * Call C code to log the event. |
| */ |
| mov INTRQ_RESUM_MONDO_HEAD, %g2 |
| stxa %g4, [%g2] ASI_QUEUE |
| membar #Sync |
| |
| rdpr %pil, %g2 |
| wrpr %g0, PIL_NORMAL_MAX, %pil |
| ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| call trace_hardirqs_off |
| nop |
| #endif |
| call sun4v_resum_overflow |
| add %sp, PTREGS_OFF, %o0 |
| |
| ba,pt %xcc, rtrap_irq |
| nop |
| |
| sun4v_nonres_mondo: |
| /* Head offset in %g2, tail offset in %g4. */ |
| mov INTRQ_NONRESUM_MONDO_HEAD, %g2 |
| ldxa [%g2] ASI_QUEUE, %g2 |
| mov INTRQ_NONRESUM_MONDO_TAIL, %g4 |
| ldxa [%g4] ASI_QUEUE, %g4 |
| cmp %g2, %g4 |
| be,pn %xcc, sun4v_nonres_mondo_queue_empty |
| nop |
| |
| /* Get &trap_block[smp_processor_id()] into %g3. */ |
| ldxa [%g0] ASI_SCRATCHPAD, %g3 |
| sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3 |
| |
| /* Get RES mondo queue base phys address into %g5. */ |
| ldx [%g3 + TRAP_PER_CPU_NONRESUM_MONDO_PA], %g5 |
| |
| /* Get RES kernel buffer base phys address into %g7. */ |
| ldx [%g3 + TRAP_PER_CPU_NONRESUM_KBUF_PA], %g7 |
| |
| /* If the first word is non-zero, queue is full. */ |
| ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g1 |
| brnz,pn %g1, sun4v_nonres_mondo_queue_full |
| nop |
| |
| lduw [%g3 + TRAP_PER_CPU_NONRESUM_QMASK], %g4 |
| |
| /* Remember this entry's offset in %g1. */ |
| mov %g2, %g1 |
| |
| /* Copy 64-byte queue entry into kernel buffer. */ |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 |
| stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC |
| add %g2, 0x08, %g2 |
| |
| /* Update queue head pointer. */ |
| and %g2, %g4, %g2 |
| |
| mov INTRQ_NONRESUM_MONDO_HEAD, %g4 |
| stxa %g2, [%g4] ASI_QUEUE |
| membar #Sync |
| |
| /* Disable interrupts and save register state so we can call |
| * C code. The etrap handling will leave %g4 in %l4 for us |
| * when it's done. |
| */ |
| rdpr %pil, %g2 |
| wrpr %g0, PIL_NORMAL_MAX, %pil |
| mov %g1, %g4 |
| ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| call trace_hardirqs_off |
| nop |
| #endif |
| /* Log the event. */ |
| add %sp, PTREGS_OFF, %o0 |
| call sun4v_nonresum_error |
| mov %l4, %o1 |
| |
| /* Return from trap. */ |
| ba,pt %xcc, rtrap_irq |
| nop |
| |
| sun4v_nonres_mondo_queue_empty: |
| retry |
| |
| sun4v_nonres_mondo_queue_full: |
| /* The queue is full, consolidate our damage by setting |
| * the head equal to the tail. We'll just trap again otherwise. |
| * Call C code to log the event. |
| */ |
| mov INTRQ_NONRESUM_MONDO_HEAD, %g2 |
| stxa %g4, [%g2] ASI_QUEUE |
| membar #Sync |
| |
| rdpr %pil, %g2 |
| wrpr %g0, PIL_NORMAL_MAX, %pil |
| ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| call trace_hardirqs_off |
| nop |
| #endif |
| call sun4v_nonresum_overflow |
| add %sp, PTREGS_OFF, %o0 |
| |
| ba,pt %xcc, rtrap_irq |
| nop |
