diff options
Diffstat (limited to 'drivers/gpu/drm/emgd/pvr/services4/srvkm/env/linux/mutils.c')
| -rw-r--r-- | drivers/gpu/drm/emgd/pvr/services4/srvkm/env/linux/mutils.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/drivers/gpu/drm/emgd/pvr/services4/srvkm/env/linux/mutils.c b/drivers/gpu/drm/emgd/pvr/services4/srvkm/env/linux/mutils.c deleted file mode 100644 index 83eab51bb1de..000000000000 --- a/drivers/gpu/drm/emgd/pvr/services4/srvkm/env/linux/mutils.c +++ /dev/null @@ -1,133 +0,0 @@ -/********************************************************************** - * - * Copyright(c) 2008 Imagination Technologies Ltd. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful but, except - * as otherwise stated in writing, 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., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - * The full GNU General Public License is included in this distribution in - * the file called "COPYING". - * - * Contact Information: - * Imagination Technologies Ltd. <gpl-support@imgtec.com> - * Home Park Estate, Kings Langley, Herts, WD4 8LZ, UK - * - ******************************************************************************/ - -#ifndef AUTOCONF_INCLUDED -#include <linux/config.h> -#endif -#include <linux/version.h> - -#include <linux/spinlock.h> -#include <linux/mm.h> -#include <asm/page.h> -#include <asm/pgtable.h> - -#include "img_defs.h" -#include "pvr_debug.h" -#include "mutils.h" - -#if defined(SUPPORT_LINUX_X86_PAT) -#define PAT_LINUX_X86_WC 1 - -#define PAT_X86_ENTRY_BITS 8 - -#define PAT_X86_BIT_PWT 1U -#define PAT_X86_BIT_PCD 2U -#define PAT_X86_BIT_PAT 4U -#define PAT_X86_BIT_MASK (PAT_X86_BIT_PAT | PAT_X86_BIT_PCD | PAT_X86_BIT_PWT) - -static IMG_BOOL g_write_combining_available = IMG_FALSE; - -#define PROT_TO_PAT_INDEX(v, B) ((v & _PAGE_ ## B) ? PAT_X86_BIT_ ## B : 0) - -static inline IMG_UINT -pvr_pat_index(pgprotval_t prot_val) -{ - IMG_UINT ret = 0; - pgprotval_t val = prot_val & _PAGE_CACHE_MASK; - - ret |= PROT_TO_PAT_INDEX(val, PAT); - ret |= PROT_TO_PAT_INDEX(val, PCD); - ret |= PROT_TO_PAT_INDEX(val, PWT); - - return ret; -} - -static inline IMG_UINT -pvr_pat_entry(u64 pat, IMG_UINT index) -{ - return (IMG_UINT)(pat >> (index * PAT_X86_ENTRY_BITS)) & PAT_X86_BIT_MASK; -} - -static IMG_VOID -PVRLinuxX86PATProbe(IMG_VOID) -{ - - if (cpu_has_pat) - { - u64 pat; - IMG_UINT pat_index; - IMG_UINT pat_entry; - - PVR_TRACE(("%s: PAT available", __FUNCTION__)); - - rdmsrl(MSR_IA32_CR_PAT, pat); - PVR_TRACE(("%s: Top 32 bits of PAT: 0x%.8x", __FUNCTION__, (IMG_UINT)(pat >> 32))); - PVR_TRACE(("%s: Bottom 32 bits of PAT: 0x%.8x", __FUNCTION__, (IMG_UINT)(pat))); - - pat_index = pvr_pat_index(_PAGE_CACHE_WC); - PVR_TRACE(("%s: PAT index for write combining: %u", __FUNCTION__, pat_index)); - - pat_entry = pvr_pat_entry(pat, pat_index); - PVR_TRACE(("%s: PAT entry for write combining: 0x%.2x (should be 0x%.2x)", __FUNCTION__, pat_entry, PAT_LINUX_X86_WC)); - -#if defined(SUPPORT_LINUX_X86_WRITECOMBINE) - g_write_combining_available = (IMG_BOOL)(pat_entry == PAT_LINUX_X86_WC); -#endif - } -#if defined(DEBUG) -#if defined(SUPPORT_LINUX_X86_WRITECOMBINE) - if (g_write_combining_available) - { - PVR_TRACE(("%s: Write combining available via PAT", __FUNCTION__)); - } - else - { - PVR_TRACE(("%s: Write combining not available", __FUNCTION__)); - } -#else - PVR_TRACE(("%s: Write combining disabled in driver build", __FUNCTION__)); -#endif -#endif -} - -pgprot_t -pvr_pgprot_writecombine(pgprot_t prot) -{ - - - return (g_write_combining_available) ? - __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_MASK) | _PAGE_CACHE_WC) : pgprot_noncached(prot); -} -#endif - -IMG_VOID -PVRLinuxMUtilsInit(IMG_VOID) -{ -#if defined(SUPPORT_LINUX_X86_PAT) - PVRLinuxX86PATProbe(); -#endif -} - |