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sgi-gru: change GRU CCH commands from inline functions to outofline f…
…unctions Change the GRU instructions that manage contexts from inline functions to out-of-line functions. This simplifies adding statistics & error checking to these functions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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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 | ||
*/ | ||
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#include <linux/kernel.h> | ||
#include "gru.h" | ||
#include "grulib.h" | ||
#include "grutables.h" | ||
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/* 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 | ||
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/* Extract the status field from a kernel handle */ | ||
#define GET_MSEG_HANDLE_STATUS(h) (((*(unsigned long *)(h)) >> 16) & 3) | ||
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static void start_instruction(void *h) | ||
{ | ||
unsigned long *w0 = h; | ||
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wmb(); /* setting CMD bit must be last */ | ||
*w0 = *w0 | 1; | ||
gru_flush_cache(h); | ||
} | ||
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static int wait_instruction_complete(void *h, enum mcs_op opc) | ||
{ | ||
int status; | ||
cycles_t start_time = get_cycles(); | ||
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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; | ||
} | ||
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#if defined CONFIG_IA64 | ||
static void cch_allocate_set_asids( | ||
struct gru_context_configuration_handle *cch, int asidval) | ||
{ | ||
int i; | ||
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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; | ||
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for (i = 0; i < 8; i++) { | ||
cch->asid[i] = asidval++; | ||
cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT) | | ||
GRU_SIZEAVAIL(21); | ||
} | ||
} | ||
#endif | ||
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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); | ||
} | ||
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int cch_start(struct gru_context_configuration_handle *cch) | ||
{ | ||
cch->opc = CCHOP_START; | ||
start_instruction(cch); | ||
return wait_instruction_complete(cch, cchop_start); | ||
} | ||
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int cch_interrupt(struct gru_context_configuration_handle *cch) | ||
{ | ||
cch->opc = CCHOP_INTERRUPT; | ||
start_instruction(cch); | ||
return wait_instruction_complete(cch, cchop_interrupt); | ||
} | ||
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int cch_deallocate(struct gru_context_configuration_handle *cch) | ||
{ | ||
cch->opc = CCHOP_DEALLOCATE; | ||
start_instruction(cch); | ||
return wait_instruction_complete(cch, cchop_deallocate); | ||
} | ||
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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); | ||
} | ||
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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); | ||
} | ||
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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); | ||
} | ||
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void tfh_restart(struct gru_tlb_fault_handle *tfh) | ||
{ | ||
tfh->opc = TFHOP_RESTART; | ||
start_instruction(tfh); | ||
} | ||
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void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh) | ||
{ | ||
tfh->opc = TFHOP_USER_POLLING_MODE; | ||
start_instruction(tfh); | ||
} | ||
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void tfh_exception(struct gru_tlb_fault_handle *tfh) | ||
{ | ||
tfh->opc = TFHOP_EXCEPTION; | ||
start_instruction(tfh); | ||
} | ||
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