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yaml --- r: 139736 b: refs/heads/master c: a24e5e1 h: refs/heads/master v: v3
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Jack Steiner
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Linus Torvalds
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Apr 3, 2009
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 438846043af39fef286f68b197d42bd75f49898e | ||
| refs/heads/master: a24e5e1caf4875bbe09f328b5f4daef6d25ebcc4 |
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| /* | ||
| * GRU KERNEL MCS INSTRUCTIONS | ||
| * | ||
| * 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 | ||
| */ | ||
|
|
||
| #include <linux/kernel.h> | ||
| #include "gru.h" | ||
| #include "grulib.h" | ||
| #include "grutables.h" | ||
|
|
||
| /* 10 sec */ | ||
| #ifdef CONFIG_IA64 | ||
| #include <asm/processor.h> | ||
| #define GRU_OPERATION_TIMEOUT (((cycles_t) local_cpu_data->itc_freq)*10) | ||
| #else | ||
| #include <asm/tsc.h> | ||
| #define GRU_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) | ||
| #endif | ||
|
|
||
| /* Extract the status field from a kernel handle */ | ||
| #define GET_MSEG_HANDLE_STATUS(h) (((*(unsigned long *)(h)) >> 16) & 3) | ||
|
|
||
| static void start_instruction(void *h) | ||
| { | ||
| unsigned long *w0 = h; | ||
|
|
||
| wmb(); /* setting CMD bit must be last */ | ||
| *w0 = *w0 | 1; | ||
| gru_flush_cache(h); | ||
| } | ||
|
|
||
| static int wait_instruction_complete(void *h, enum mcs_op opc) | ||
| { | ||
| int status; | ||
| cycles_t start_time = get_cycles(); | ||
|
|
||
| while (1) { | ||
| cpu_relax(); | ||
| status = GET_MSEG_HANDLE_STATUS(h); | ||
| if (status != CCHSTATUS_ACTIVE) | ||
| break; | ||
| if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time)) | ||
| panic("GRU %p is malfunctioning\n", h); | ||
| } | ||
| return status; | ||
| } | ||
|
|
||
| #if defined CONFIG_IA64 | ||
| static 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++); | ||
| #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 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 | ||
|
|
||
| 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, cchop_allocate); | ||
| } | ||
|
|
||
| int cch_start(struct gru_context_configuration_handle *cch) | ||
| { | ||
| cch->opc = CCHOP_START; | ||
| start_instruction(cch); | ||
| return wait_instruction_complete(cch, cchop_start); | ||
| } | ||
|
|
||
| int cch_interrupt(struct gru_context_configuration_handle *cch) | ||
| { | ||
| cch->opc = CCHOP_INTERRUPT; | ||
| start_instruction(cch); | ||
| return wait_instruction_complete(cch, cchop_interrupt); | ||
| } | ||
|
|
||
| int cch_deallocate(struct gru_context_configuration_handle *cch) | ||
| { | ||
| cch->opc = CCHOP_DEALLOCATE; | ||
| start_instruction(cch); | ||
| return wait_instruction_complete(cch, cchop_deallocate); | ||
| } | ||
|
|
||
| int cch_interrupt_sync(struct gru_context_configuration_handle | ||
| *cch) | ||
| { | ||
| cch->opc = CCHOP_INTERRUPT_SYNC; | ||
| start_instruction(cch); | ||
| return wait_instruction_complete(cch, cchop_interrupt_sync); | ||
| } | ||
|
|
||
| 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, tghop_invalidate); | ||
| } | ||
|
|
||
| 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); | ||
| } | ||
|
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| 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); | ||
| } | ||
|
|
||
| void tfh_restart(struct gru_tlb_fault_handle *tfh) | ||
| { | ||
| tfh->opc = TFHOP_RESTART; | ||
| start_instruction(tfh); | ||
| } | ||
|
|
||
| void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh) | ||
| { | ||
| tfh->opc = TFHOP_USER_POLLING_MODE; | ||
| start_instruction(tfh); | ||
| } | ||
|
|
||
| void tfh_exception(struct gru_tlb_fault_handle *tfh) | ||
| { | ||
| tfh->opc = TFHOP_EXCEPTION; | ||
| start_instruction(tfh); | ||
| } | ||
|
|
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