1 files changed, 663 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/gruhandles.h b/drivers/misc/sgi-gru/gruhandles.h
new file mode 100644
index 000000000000..d16031d62673
--- /dev/null
+++ b/drivers/misc/sgi-gru/gruhandles.h
@@ -0,0 +1,663 @@
+/*
+ * SN Platform GRU Driver
+ *
+ *              GRU HANDLE DEFINITION
+ *
+ *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#ifndef __GRUHANDLES_H__
+#define __GRUHANDLES_H__
+#include "gru_instructions.h"
+
+/*
+ * Manifest constants for GRU Memory Map
+ */
+#define GRU_GSEG0_BASE          0
+#define GRU_MCS_BASE            (64 * 1024 * 1024)
+#define GRU_SIZE                (128UL * 1024 * 1024)
+
+/* Handle & resource counts */
+#define GRU_NUM_CB              128
+#define GRU_NUM_DSR_BYTES       (32 * 1024)
+#define GRU_NUM_TFM             16
+#define GRU_NUM_TGH             24
+#define GRU_NUM_CBE             128
+#define GRU_NUM_TFH             128
+#define GRU_NUM_CCH             16
+#define GRU_NUM_GSH             1
+
+/* Maximum resource counts that can be reserved by user programs */
+#define GRU_NUM_USER_CBR        GRU_NUM_CBE
+#define GRU_NUM_USER_DSR_BYTES  GRU_NUM_DSR_BYTES
+
+/* Bytes per handle & handle stride. Code assumes all cb, tfh, cbe handles
+ * are the same */
+#define GRU_HANDLE_BYTES        64
+#define GRU_HANDLE_STRIDE       256
+
+/* Base addresses of handles */
+#define GRU_TFM_BASE            (GRU_MCS_BASE + 0x00000)
+#define GRU_TGH_BASE            (GRU_MCS_BASE + 0x08000)
+#define GRU_CBE_BASE            (GRU_MCS_BASE + 0x10000)
+#define GRU_TFH_BASE            (GRU_MCS_BASE + 0x18000)
+#define GRU_CCH_BASE            (GRU_MCS_BASE + 0x20000)
+#define GRU_GSH_BASE            (GRU_MCS_BASE + 0x30000)
+
+/* User gseg constants */
+#define GRU_GSEG_STRIDE         (4 * 1024 * 1024)
+#define GSEG_BASE(a)            ((a) & ~(GRU_GSEG_PAGESIZE - 1))
+
+/* Data segment constants */
+#define GRU_DSR_AU_BYTES        1024
+#define GRU_DSR_CL              (GRU_NUM_DSR_BYTES / GRU_CACHE_LINE_BYTES)
+#define GRU_DSR_AU_CL           (GRU_DSR_AU_BYTES / GRU_CACHE_LINE_BYTES)
+#define GRU_DSR_AU              (GRU_NUM_DSR_BYTES / GRU_DSR_AU_BYTES)
+
+/* Control block constants */
+#define GRU_CBR_AU_SIZE         2
+#define GRU_CBR_AU              (GRU_NUM_CBE / GRU_CBR_AU_SIZE)
+
+/* Convert resource counts to the number of AU */
+#define GRU_DS_BYTES_TO_AU(n)   DIV_ROUND_UP(n, GRU_DSR_AU_BYTES)
+#define GRU_CB_COUNT_TO_AU(n)   DIV_ROUND_UP(n, GRU_CBR_AU_SIZE)
+
+/* UV limits */
+#define GRU_CHIPLETS_PER_HUB    2
+#define GRU_HUBS_PER_BLADE      1
+#define GRU_CHIPLETS_PER_BLADE  (GRU_HUBS_PER_BLADE * GRU_CHIPLETS_PER_HUB)
+
+/* User GRU Gseg offsets */
+#define GRU_CB_BASE             0
+#define GRU_CB_LIMIT            (GRU_CB_BASE + GRU_HANDLE_STRIDE * GRU_NUM_CBE)
+#define GRU_DS_BASE             0x20000
+#define GRU_DS_LIMIT            (GRU_DS_BASE + GRU_NUM_DSR_BYTES)
+
+/* Convert a GRU physical address to the chiplet offset */
+#define GSEGPOFF(h)             ((h) & (GRU_SIZE - 1))
+
+/* Convert an arbitrary handle address to the beginning of the GRU segment */
+#ifndef __PLUGIN__
+#define GRUBASE(h)              ((void *)((unsigned long)(h) & ~(GRU_SIZE - 1)))
+#else
+extern void *gmu_grubase(void *h);
+#define GRUBASE(h)              gmu_grubase(h)
+#endif
+
+/* General addressing macros. */
+static inline void *get_gseg_base_address(void *base, int ctxnum)
+{
+        return (void *)(base + GRU_GSEG0_BASE + GRU_GSEG_STRIDE * ctxnum);
+}
+
+static inline void *get_gseg_base_address_cb(void *base, int ctxnum, int line)
+{
+        return (void *)(get_gseg_base_address(base, ctxnum) +
+                        GRU_CB_BASE + GRU_HANDLE_STRIDE * line);
+}
+
+static inline void *get_gseg_base_address_ds(void *base, int ctxnum, int line)
+{
+        return (void *)(get_gseg_base_address(base, ctxnum) + GRU_DS_BASE +
+                        GRU_CACHE_LINE_BYTES * line);
+}
+
+static inline struct gru_tlb_fault_map *get_tfm(void *base, int ctxnum)
+{
+        return (struct gru_tlb_fault_map *)(base + GRU_TFM_BASE +
+                                        ctxnum * GRU_HANDLE_STRIDE);
+}
+
+static inline struct gru_tlb_global_handle *get_tgh(void *base, int ctxnum)
+{
+        return (struct gru_tlb_global_handle *)(base + GRU_TGH_BASE +
+                                        ctxnum * GRU_HANDLE_STRIDE);
+}
+
+static inline struct gru_control_block_extended *get_cbe(void *base, int ctxnum)
+{
+        return (struct gru_control_block_extended *)(base + GRU_CBE_BASE +
+                                        ctxnum * GRU_HANDLE_STRIDE);
+}
+
+static inline struct gru_tlb_fault_handle *get_tfh(void *base, int ctxnum)
+{
+        return (struct gru_tlb_fault_handle *)(base + GRU_TFH_BASE +
+                                        ctxnum * GRU_HANDLE_STRIDE);
+}
+
+static inline struct gru_context_configuration_handle *get_cch(void *base,
+                                        int ctxnum)
+{
+        return (struct gru_context_configuration_handle *)(base +
+                                GRU_CCH_BASE + ctxnum * GRU_HANDLE_STRIDE);
+}
+
+static inline unsigned long get_cb_number(void *cb)
+{
+        return (((unsigned long)cb - GRU_CB_BASE) % GRU_GSEG_PAGESIZE) /
+                                        GRU_HANDLE_STRIDE;
+}
+
+/* byte offset to a specific GRU chiplet. (p=pnode, c=chiplet (0 or 1)*/
+static inline unsigned long gru_chiplet_paddr(unsigned long paddr, int pnode,
+                                                        int chiplet)
+{
+        return paddr + GRU_SIZE * (2 * pnode  + chiplet);
+}
+
+static inline void *gru_chiplet_vaddr(void *vaddr, int pnode, int chiplet)
+{
+        return vaddr + GRU_SIZE * (2 * pnode  + chiplet);
+}
+
+
+
+/*
+ * Global TLB Fault Map
+ *      Bitmap of outstanding TLB misses needing interrupt/polling service.
+ *
+ */
+struct gru_tlb_fault_map {
+        unsigned long fault_bits[BITS_TO_LONGS(GRU_NUM_CBE)];
+        unsigned long fill0[2];
+        unsigned long done_bits[BITS_TO_LONGS(GRU_NUM_CBE)];
+        unsigned long fill1[2];
+};
+
+/*
+ * TGH - TLB Global Handle
+ *      Used for TLB flushing.
+ *
+ */
+struct gru_tlb_global_handle {
+        unsigned int cmd:1;             /* DW 0 */
+        unsigned int delresp:1;
+        unsigned int opc:1;
+        unsigned int fill1:5;
+
+        unsigned int fill2:8;
+
+        unsigned int status:2;
+        unsigned long fill3:2;
+        unsigned int state:3;
+        unsigned long fill4:1;
+
+        unsigned int cause:3;
+        unsigned long fill5:37;
+
+        unsigned long vaddr:64;         /* DW 1 */
+
+        unsigned int asid:24;           /* DW 2 */
+        unsigned int fill6:8;
+
+        unsigned int pagesize:5;
+        unsigned int fill7:11;
+
+        unsigned int global:1;
+        unsigned int fill8:15;
+
+        unsigned long vaddrmask:39;     /* DW 3 */
+        unsigned int fill9:9;
+        unsigned int n:10;
+        unsigned int fill10:6;
+
+        unsigned int ctxbitmap:16;      /* DW4 */
+        unsigned long fill11[3];
+};
+
+enum gru_tgh_cmd {
+        TGHCMD_START
+};
+
+enum gru_tgh_opc {
+        TGHOP_TLBNOP,
+        TGHOP_TLBINV
+};
+
+enum gru_tgh_status {
+        TGHSTATUS_IDLE,
+        TGHSTATUS_EXCEPTION,
+        TGHSTATUS_ACTIVE
+};
+
+enum gru_tgh_state {
+        TGHSTATE_IDLE,
+        TGHSTATE_PE_INVAL,
+        TGHSTATE_INTERRUPT_INVAL,
+        TGHSTATE_WAITDONE,
+        TGHSTATE_RESTART_CTX,
+};
+
+/*
+ * TFH - TLB Global Handle
+ *      Used for TLB dropins into the GRU TLB.
+ *
+ */
+struct gru_tlb_fault_handle {
+        unsigned int cmd:1;             /* DW 0 - low 32*/
+        unsigned int delresp:1;
+        unsigned int fill0:2;
+        unsigned int opc:3;
+        unsigned int fill1:9;
+
+        unsigned int status:2;
+        unsigned int fill2:1;
+        unsigned int color:1;
+        unsigned int state:3;
+        unsigned int fill3:1;
+
+        unsigned int cause:7;           /* DW 0 - high 32 */
+        unsigned int fill4:1;
+
+        unsigned int indexway:12;
+        unsigned int fill5:4;
+
+        unsigned int ctxnum:4;
+        unsigned int fill6:12;
+
+        unsigned long missvaddr:64;     /* DW 1 */
+
+        unsigned int missasid:24;       /* DW 2 */
+        unsigned int fill7:8;
+        unsigned int fillasid:24;
+        unsigned int dirty:1;
+        unsigned int gaa:2;
+        unsigned long fill8:5;
+
+        unsigned long pfn:41;           /* DW 3 */
+        unsigned int fill9:7;
+        unsigned int pagesize:5;
+        unsigned int fill10:11;
+
+        unsigned long fillvaddr:64;     /* DW 4 */
+
+        unsigned long fill11[3];
+};
+
+enum gru_tfh_opc {
+        TFHOP_NOOP,
+        TFHOP_RESTART,
+        TFHOP_WRITE_ONLY,
+        TFHOP_WRITE_RESTART,
+        TFHOP_EXCEPTION,
+        TFHOP_USER_POLLING_MODE = 7,
+};
+
+enum tfh_status {
+        TFHSTATUS_IDLE,
+        TFHSTATUS_EXCEPTION,
+        TFHSTATUS_ACTIVE,
+};
+
+enum tfh_state {
+        TFHSTATE_INACTIVE,
+        TFHSTATE_IDLE,
+        TFHSTATE_MISS_UPM,
+        TFHSTATE_MISS_FMM,
+        TFHSTATE_HW_ERR,
+        TFHSTATE_WRITE_TLB,
+        TFHSTATE_RESTART_CBR,
+};
+
+/* TFH cause bits */
+enum tfh_cause {
+        TFHCAUSE_NONE,
+        TFHCAUSE_TLB_MISS,
+        TFHCAUSE_TLB_MOD,
+        TFHCAUSE_HW_ERROR_RR,
+        TFHCAUSE_HW_ERROR_MAIN_ARRAY,
+        TFHCAUSE_HW_ERROR_VALID,
+        TFHCAUSE_HW_ERROR_PAGESIZE,
+        TFHCAUSE_INSTRUCTION_EXCEPTION,
+        TFHCAUSE_UNCORRECTIBLE_ERROR,
+};
+
+/* GAA values */
+#define GAA_RAM                         0x0
+#define GAA_NCRAM                       0x2
+#define GAA_MMIO                        0x1
+#define GAA_REGISTER                    0x3
+
+/* GRU paddr shift for pfn. (NOTE: shift is NOT by actual pagesize) */
+#define GRU_PADDR_SHIFT                 12
+
+/*
+ * Context Configuration handle
+ *      Used to allocate resources to a GSEG context.
+ *
+ */
+struct gru_context_configuration_handle {
+        unsigned int cmd:1;                     /* DW0 */
+        unsigned int delresp:1;
+        unsigned int opc:3;
+        unsigned int unmap_enable:1;
+        unsigned int req_slice_set_enable:1;
+        unsigned int req_slice:2;
+        unsigned int cb_int_enable:1;
+        unsigned int tlb_int_enable:1;
+        unsigned int tfm_fault_bit_enable:1;
+        unsigned int tlb_int_select:4;
+
+        unsigned int status:2;
+        unsigned int state:2;
+        unsigned int reserved2:4;
+
+        unsigned int cause:4;
+        unsigned int tfm_done_bit_enable:1;
+        unsigned int unused:3;
+
+        unsigned int dsr_allocation_map;
+
+        unsigned long cbr_allocation_map;       /* DW1 */
+
+        unsigned int asid[8];                   /* DW 2 - 5 */
+        unsigned short sizeavail[8];            /* DW 6 - 7 */
+} __attribute__ ((packed));
+
+enum gru_cch_opc {
+        CCHOP_START = 1,
+        CCHOP_ALLOCATE,
+        CCHOP_INTERRUPT,
+        CCHOP_DEALLOCATE,
+        CCHOP_INTERRUPT_SYNC,
+};
+
+enum gru_cch_status {
+        CCHSTATUS_IDLE,
+        CCHSTATUS_EXCEPTION,
+        CCHSTATUS_ACTIVE,
+};
+
+enum gru_cch_state {
+        CCHSTATE_INACTIVE,
+        CCHSTATE_MAPPED,
+        CCHSTATE_ACTIVE,
+        CCHSTATE_INTERRUPTED,
+};
+
+/* CCH Exception cause */
+enum gru_cch_cause {
+        CCHCAUSE_REGION_REGISTER_WRITE_ERROR = 1,
+        CCHCAUSE_ILLEGAL_OPCODE = 2,
+        CCHCAUSE_INVALID_START_REQUEST = 3,
+        CCHCAUSE_INVALID_ALLOCATION_REQUEST = 4,
+        CCHCAUSE_INVALID_DEALLOCATION_REQUEST = 5,
+        CCHCAUSE_INVALID_INTERRUPT_REQUEST = 6,
+        CCHCAUSE_CCH_BUSY = 7,
+        CCHCAUSE_NO_CBRS_TO_ALLOCATE = 8,
+        CCHCAUSE_BAD_TFM_CONFIG = 9,
+        CCHCAUSE_CBR_RESOURCES_OVERSUBSCRIPED = 10,
+        CCHCAUSE_DSR_RESOURCES_OVERSUBSCRIPED = 11,
+        CCHCAUSE_CBR_DEALLOCATION_ERROR = 12,
+};
+/*
+ * CBE - Control Block Extended
+ *      Maintains internal GRU state for active CBs.
+ *
+ */
+struct gru_control_block_extended {
+        unsigned int reserved0:1;       /* DW 0  - low */
+        unsigned int imacpy:3;
+        unsigned int reserved1:4;
+        unsigned int xtypecpy:3;
+        unsigned int iaa0cpy:2;
+        unsigned int iaa1cpy:2;
+        unsigned int reserved2:1;
+        unsigned int opccpy:8;
+        unsigned int exopccpy:8;
+
+        unsigned int idef2cpy:22;       /* DW 0  - high */
+        unsigned int reserved3:10;
+
+        unsigned int idef4cpy:22;       /* DW 1 */
+        unsigned int reserved4:10;
+        unsigned int idef4upd:22;
+        unsigned int reserved5:10;
+
+        unsigned long idef1upd:64;      /* DW 2 */
+
+        unsigned long idef5cpy:64;      /* DW 3 */
+
+        unsigned long idef6cpy:64;      /* DW 4 */
+
+        unsigned long idef3upd:64;      /* DW 5 */
+
+        unsigned long idef5upd:64;      /* DW 6 */
+
+        unsigned int idef2upd:22;       /* DW 7 */
+        unsigned int reserved6:10;
+
+        unsigned int ecause:20;
+        unsigned int cbrstate:4;
+        unsigned int cbrexecstatus:8;
+};
+
+enum gru_cbr_state {
+        CBRSTATE_INACTIVE,
+        CBRSTATE_IDLE,
+        CBRSTATE_PE_CHECK,
+        CBRSTATE_QUEUED,
+        CBRSTATE_WAIT_RESPONSE,
+        CBRSTATE_INTERRUPTED,
+        CBRSTATE_INTERRUPTED_MISS_FMM,
+        CBRSTATE_BUSY_INTERRUPT_MISS_FMM,
+        CBRSTATE_INTERRUPTED_MISS_UPM,
+        CBRSTATE_BUSY_INTERRUPTED_MISS_UPM,
+        CBRSTATE_REQUEST_ISSUE,
+        CBRSTATE_BUSY_INTERRUPT,
+};
+
+/* CBE cbrexecstatus bits */
+#define CBR_EXS_ABORT_OCC_BIT                   0
+#define CBR_EXS_INT_OCC_BIT                     1
+#define CBR_EXS_PENDING_BIT                     2
+#define CBR_EXS_QUEUED_BIT                      3
+#define CBR_EXS_TLBHW_BIT                       4
+#define CBR_EXS_EXCEPTION_BIT                   5
+
+#define CBR_EXS_ABORT_OCC                       (1 << CBR_EXS_ABORT_OCC_BIT)
+#define CBR_EXS_INT_OCC                         (1 << CBR_EXS_INT_OCC_BIT)
+#define CBR_EXS_PENDING                         (1 << CBR_EXS_PENDING_BIT)
+#define CBR_EXS_QUEUED                          (1 << CBR_EXS_QUEUED_BIT)
+#define CBR_EXS_TLBHW                           (1 << CBR_EXS_TLBHW_BIT)
+#define CBR_EXS_EXCEPTION                       (1 << CBR_EXS_EXCEPTION_BIT)
+
+/* CBE ecause bits  - defined in gru_instructions.h */
+
+/*
+ * Convert a processor pagesize into the strange encoded pagesize used by the
+ * GRU. Processor pagesize is encoded as log of bytes per page. (or PAGE_SHIFT)
+ *      pagesize        log pagesize    grupagesize
+ *        4k                    12      0
+ *       16k                    14      1
+ *       64k                    16      2
+ *      256k                    18      3
+ *        1m                    20      4
+ *        2m                    21      5
+ *        4m                    22      6
+ *       16m                    24      7
+ *       64m                    26      8
+ *      ...
+ */
+#define GRU_PAGESIZE(sh)        ((((sh) > 20 ? (sh) + 2: (sh)) >> 1) - 6)
+#define GRU_SIZEAVAIL(sh)       (1UL << GRU_PAGESIZE(sh))
+
+/* minimum TLB purge count to ensure a full purge */
+#define GRUMAXINVAL             1024UL
+
+
+/* Extract the status field from a kernel handle */
+#define GET_MSEG_HANDLE_STATUS(h)       (((*(unsigned long *)(h)) >> 16) & 3)
+
+static inline void start_instruction(void *h)
+{
+        unsigned long *w0 = h;
+
+        wmb();          /* setting CMD bit must be last */
+        *w0 = *w0 | 1;
+        gru_flush_cache(h);
+}
+
+static inline int wait_instruction_complete(void *h)
+{
+        int status;
+
+        do {
+                cpu_relax();
+                barrier();
+                status = GET_MSEG_HANDLE_STATUS(h);
+        } while (status == CCHSTATUS_ACTIVE);
+        return status;
+}
+
+#if defined CONFIG_IA64
+static inline void cch_allocate_set_asids(
+                  struct gru_context_configuration_handle *cch, int asidval)
+{
+        int i;
+
+        for (i = 0; i <= RGN_HPAGE; i++) {  /*  assume HPAGE is last region */
+                cch->asid[i] = (asidval++);
+#if 0
+                /* ZZZ hugepages not supported yet */
+                if (i == RGN_HPAGE)
+                        cch->sizeavail[i] = GRU_SIZEAVAIL(hpage_shift);
+                else
+#endif
+                        cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT);
+        }
+}
+#elif defined CONFIG_X86_64
+static inline void cch_allocate_set_asids(
+                  struct gru_context_configuration_handle *cch, int asidval)
+{
+        int i;
+
+        for (i = 0; i < 8; i++) {
+                cch->asid[i] = asidval++;
+                cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT) |
+                        GRU_SIZEAVAIL(21);
+        }
+}
+#endif
+
+static inline int cch_allocate(struct gru_context_configuration_handle *cch,
+                               int asidval, unsigned long cbrmap,
+                               unsigned long dsrmap)
+{
+        cch_allocate_set_asids(cch, asidval);
+        cch->dsr_allocation_map = dsrmap;
+        cch->cbr_allocation_map = cbrmap;
+        cch->opc = CCHOP_ALLOCATE;
+        start_instruction(cch);
+        return wait_instruction_complete(cch);
+}
+
+static inline int cch_start(struct gru_context_configuration_handle *cch)
+{
+        cch->opc = CCHOP_START;
+        start_instruction(cch);
+        return wait_instruction_complete(cch);
+}
+
+static inline int cch_interrupt(struct gru_context_configuration_handle *cch)
+{
+        cch->opc = CCHOP_INTERRUPT;
+        start_instruction(cch);
+        return wait_instruction_complete(cch);
+}
+
+static inline int cch_deallocate(struct gru_context_configuration_handle *cch)
+{
+        cch->opc = CCHOP_DEALLOCATE;
+        start_instruction(cch);
+        return wait_instruction_complete(cch);
+}
+
+static inline int cch_interrupt_sync(struct gru_context_configuration_handle
+                                     *cch)
+{
+        cch->opc = CCHOP_INTERRUPT_SYNC;
+        start_instruction(cch);
+        return wait_instruction_complete(cch);
+}
+
+static inline int tgh_invalidate(struct gru_tlb_global_handle *tgh,
+                                 unsigned long vaddr, unsigned long vaddrmask,
+                                 int asid, int pagesize, int global, int n,
+                                 unsigned short ctxbitmap)
+{
+        tgh->vaddr = vaddr;
+        tgh->asid = asid;
+        tgh->pagesize = pagesize;
+        tgh->n = n;
+        tgh->global = global;
+        tgh->vaddrmask = vaddrmask;
+        tgh->ctxbitmap = ctxbitmap;
+        tgh->opc = TGHOP_TLBINV;
+        start_instruction(tgh);
+        return wait_instruction_complete(tgh);
+}
+
+static inline void tfh_write_only(struct gru_tlb_fault_handle *tfh,
+                                  unsigned long pfn, unsigned long vaddr,
+                                  int asid, int dirty, int pagesize)
+{
+        tfh->fillasid = asid;
+        tfh->fillvaddr = vaddr;
+        tfh->pfn = pfn;
+        tfh->dirty = dirty;
+        tfh->pagesize = pagesize;
+        tfh->opc = TFHOP_WRITE_ONLY;
+        start_instruction(tfh);
+}
+
+static inline void tfh_write_restart(struct gru_tlb_fault_handle *tfh,
+                                     unsigned long paddr, int gaa,
+                                     unsigned long vaddr, int asid, int dirty,
+                                     int pagesize)
+{
+        tfh->fillasid = asid;
+        tfh->fillvaddr = vaddr;
+        tfh->pfn = paddr >> GRU_PADDR_SHIFT;
+        tfh->gaa = gaa;
+        tfh->dirty = dirty;
+        tfh->pagesize = pagesize;
+        tfh->opc = TFHOP_WRITE_RESTART;
+        start_instruction(tfh);
+}
+
+static inline void tfh_restart(struct gru_tlb_fault_handle *tfh)
+{
+        tfh->opc = TFHOP_RESTART;
+        start_instruction(tfh);
+}
+
+static inline void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh)
+{
+        tfh->opc = TFHOP_USER_POLLING_MODE;
+        start_instruction(tfh);
+}
+
+static inline void tfh_exception(struct gru_tlb_fault_handle *tfh)
+{
+        tfh->opc = TFHOP_EXCEPTION;
+        start_instruction(tfh);
+}
+
+#endif /* __GRUHANDLES_H__ */