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Ian Campbell
443701ef0c
As recommended in http://www.gnu.org/licenses/gpl-howto.en.html. This is the result of: $ git grep -El Mass\|Temple\|Franklin | xargs ./fsf.pl Where fsf.pl is: #!/usr/bin/perl -w -pi.bak -0777 my $repl = 'If not, see <http://www.gnu.org/licenses/>.'; my $br = qr/(?:\s*\n\s*(?:[\*\#]|\/\/|\.\\" )?\s*|\s+)/; my $inwt = qr/[Ii]f${br}not,${br}write${br}(?:to${br})?the${br}Free${br}Software${br}Foundation,(?:${br}Inc\.,)?/; my $mass = qr/675${br}Mass${br}Ave,?${br}Cambridge,?${br}MA${br}02139,?${br}USA,?\.?/; my $franklin = qr/51${br}Franklin${br}St(?:reet)?(?:,${br}| - )Fifth${br}Floor,?${br}Boston,?${br}MA,?${br}02110-1301,?${br}USA,?\.?/; my $temple = qr/59${br}Temple${br}Place(?:,${br}| - )Suite${br}330,?${br}Boston,?${br}MA,?${br}021110?-1307,?${br}USA,?\.?/; s|$inwt$br$mass|$repl|m; s|$inwt$br$franklin|$repl|m; s|$inwt$br$temple|$repl|m; The only remaining mentions of these addresses are in COPYING files which I haven't touched. Some of the changed files are imports from elsewhere, however filtering them out is tricky, I think it is tolerable to have these files be modified here and then perhaps reverted on the next sync, since it's only 1-2 lines and obvious what is going on. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
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* cacheattr.c: MTRR and PAT initialisation.
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*
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* Copyright (c) 2008, Citrix Systems, Inc.
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*
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* Authors:
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* Keir Fraser <keir@xen.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "util.h"
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#include "config.h"
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#define MSR_MTRRphysBase(reg) (0x200 + 2 * (reg))
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#define MSR_MTRRphysMask(reg) (0x200 + 2 * (reg) + 1)
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#define MSR_MTRRcap 0x00fe
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#define MSR_MTRRfix64K_00000 0x0250
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#define MSR_MTRRfix16K_80000 0x0258
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#define MSR_MTRRfix16K_A0000 0x0259
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#define MSR_MTRRfix4K_C0000 0x0268
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#define MSR_MTRRfix4K_C8000 0x0269
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#define MSR_MTRRfix4K_D0000 0x026a
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#define MSR_MTRRfix4K_D8000 0x026b
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#define MSR_MTRRfix4K_E0000 0x026c
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#define MSR_MTRRfix4K_E8000 0x026d
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#define MSR_MTRRfix4K_F0000 0x026e
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#define MSR_MTRRfix4K_F8000 0x026f
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#define MSR_PAT 0x0277
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#define MSR_MTRRdefType 0x02ff
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unsigned int cpu_phys_addr(void)
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{
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uint32_t eax, ebx, ecx, edx;
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unsigned int phys_bits = 36;
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/* Find the physical address size for this CPU. */
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cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
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if ( eax >= 0x80000008 )
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{
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cpuid(0x80000008, &eax, &ebx, &ecx, &edx);
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phys_bits = (uint8_t)eax;
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}
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return phys_bits;
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}
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void cacheattr_init(void)
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{
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uint32_t eax, ebx, ecx, edx;
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uint64_t mtrr_cap, mtrr_def, content, addr_mask;
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unsigned int i, nr_var_ranges, phys_bits;
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/* Does the CPU support architectural MTRRs? */
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cpuid(0x00000001, &eax, &ebx, &ecx, &edx);
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if ( !(edx & (1u << 12)) )
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return;
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phys_bits = cpu_phys_addr();
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printf("%u-bit phys ... ", phys_bits);
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addr_mask = ((1ull << phys_bits) - 1) & ~((1ull << 12) - 1);
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mtrr_cap = rdmsr(MSR_MTRRcap);
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mtrr_def = (1u << 11) | 6; /* E, default type WB */
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/* Fixed-range MTRRs supported? */
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if ( mtrr_cap & (1u << 8) )
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{
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/* 0x00000-0x9ffff: Write Back (WB) */
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content = 0x0606060606060606ull;
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wrmsr(MSR_MTRRfix64K_00000, content);
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wrmsr(MSR_MTRRfix16K_80000, content);
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/* 0xa0000-0xbffff: Write Combining (WC) */
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if ( mtrr_cap & (1u << 10) ) /* WC supported? */
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content = 0x0101010101010101ull;
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wrmsr(MSR_MTRRfix16K_A0000, content);
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/* 0xc0000-0xfffff: Write Back (WB) */
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content = 0x0606060606060606ull;
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for ( i = 0; i < 8; i++ )
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wrmsr(MSR_MTRRfix4K_C0000 + i, content);
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mtrr_def |= 1u << 10; /* FE */
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printf("fixed MTRRs ... ");
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}
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/* Variable-range MTRRs supported? */
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nr_var_ranges = (uint8_t)mtrr_cap;
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if ( nr_var_ranges != 0 )
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{
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uint64_t base = pci_mem_start, size;
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for ( i = 0; !(base >> 32) && (i < nr_var_ranges); i++ )
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{
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size = PAGE_SIZE;
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while ( !(base & size) )
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size <<= 1;
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while ( ((base + size) < base) || ((base + size - 1) >> 32) )
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size >>= 1;
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wrmsr(MSR_MTRRphysBase(i), base);
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wrmsr(MSR_MTRRphysMask(i), (~(size - 1) & addr_mask) | (1u << 11));
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base += size;
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}
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for ( base = pci_hi_mem_start;
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(base != pci_hi_mem_end) && (i < nr_var_ranges); i++ )
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{
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size = PAGE_SIZE;
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while ( !(base & size) )
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size <<= 1;
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while ( (base + size < base) || (base + size > pci_hi_mem_end) )
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size >>= 1;
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wrmsr(MSR_MTRRphysBase(i), base);
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wrmsr(MSR_MTRRphysMask(i), (~(size - 1) & addr_mask) | (1u << 11));
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base += size;
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}
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printf("var MTRRs [%d/%d] ... ", i, nr_var_ranges);
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}
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wrmsr(MSR_MTRRdefType, mtrr_def);
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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