Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4873
-gerrit
commit 6cdbf190468e18d40eff6bde91218917c514d675 Author: Aaron Durbin adurbin@chromium.org Date: Thu Oct 10 12:41:49 2013 -0500
x86: add common definitions for control registers
The access to control registers were scattered about. Provide a single header file to provide the correct access function and definitions.
BUG=chrome-os-partner:22991 BRANCH=None TEST=Built and booted using this infrastructure. Also objdump'd the assembly to ensure consistency (objdump -d -r -S | grep xmm).
Change-Id: Iff7a043e4e5ba930a6a77f968f1fcc14784214e9 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/172641 Reviewed-by: Stefan Reinauer reinauer@google.com --- src/arch/x86/include/arch/cpu.h | 1 + src/cpu/x86/lapic/lapic_cpu_init.c | 27 ++------- src/include/cpu/x86/cache.h | 37 ++---------- src/include/cpu/x86/cr.h | 112 +++++++++++++++++++++++++++++++++++++ 4 files changed, 123 insertions(+), 54 deletions(-)
diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h index 3e50be4..281565b 100644 --- a/src/arch/x86/include/arch/cpu.h +++ b/src/arch/x86/include/arch/cpu.h @@ -214,5 +214,6 @@ static inline void get_fms(struct cpuinfo_x86 *c, uint32_t tfms) #endif
#define asmlinkage __attribute__((regparm(0))) +#define alwaysinline inline __attribute__((always_inline))
#endif /* ARCH_CPU_H */ diff --git a/src/cpu/x86/lapic/lapic_cpu_init.c b/src/cpu/x86/lapic/lapic_cpu_init.c index 555187f..2aef2a4 100644 --- a/src/cpu/x86/lapic/lapic_cpu_init.c +++ b/src/cpu/x86/lapic/lapic_cpu_init.c @@ -20,6 +20,7 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+#include <cpu/x86/cr.h> #include <cpu/x86/lapic.h> #include <delay.h> #include <lib.h> @@ -401,26 +402,6 @@ void stop_this_cpu(void) } #endif
-#ifdef __SSE3__ -static __inline__ __attribute__((always_inline)) unsigned long readcr4(void) -{ - unsigned long value; - __asm__ __volatile__ ( - "mov %%cr4, %[value]" - : [value] "=a" (value)); - return value; -} - -static __inline__ __attribute__((always_inline)) void writecr4(unsigned long Data) -{ - __asm__ __volatile__ ( - "mov %%eax, %%cr4" - : - : "a" (Data) - ); -} -#endif - /* C entry point of secondary cpus */ void asmlinkage secondary_cpu_init(unsigned int index) { @@ -435,9 +416,9 @@ void asmlinkage secondary_cpu_init(unsigned int index) * Turn on CR4.OSFXSR and CR4.OSXMMEXCPT when SSE options enabled */ u32 cr4_val; - cr4_val = readcr4(); - cr4_val |= (1 << 9 | 1 << 10); - writecr4(cr4_val); + cr4_val = read_cr4(); + cr4_val |= (CR4_OSFXSR | CR4_OSXMMEXCPT); + write_cr4(cr4_val); #endif cpu_initialize(index); #if CONFIG_SERIAL_CPU_INIT diff --git a/src/include/cpu/x86/cache.h b/src/include/cpu/x86/cache.h index a448228..a4d976f 100644 --- a/src/include/cpu/x86/cache.h +++ b/src/include/cpu/x86/cache.h @@ -20,8 +20,10 @@ #ifndef CPU_X86_CACHE #define CPU_X86_CACHE
-#define CR0_CacheDisable (1 << 30) -#define CR0_NoWriteThrough (1 << 29) +#include <cpu/x86/cr.h> + +#define CR0_CacheDisable (CR0_CD) +#define CR0_NoWriteThrough (CR0_NW)
#if !defined(__ASSEMBLER__)
@@ -33,21 +35,6 @@
#if defined(__GNUC__)
-/* The memory clobber prevents the GCC from reordering the read/write order - * of CR0 - */ -static inline unsigned long read_cr0(void) -{ - unsigned long cr0; - asm volatile ("movl %%cr0, %0" : "=r" (cr0) :: "memory"); - return cr0; -} - -static inline void write_cr0(unsigned long cr0) -{ - asm volatile ("movl %0, %%cr0" : : "r" (cr0) : "memory"); -} - static inline void wbinvd(void) { asm volatile ("wbinvd" ::: "memory"); @@ -55,18 +42,6 @@ static inline void wbinvd(void)
#else
-static inline unsigned long read_cr0(void) -{ - unsigned long cr0; - asm volatile ("movl %%cr0, %0" : "=r" (cr0)); - return cr0; -} - -static inline void write_cr0(unsigned long cr0) -{ - asm volatile ("movl %0, %%cr0" : : "r" (cr0)); -} - static inline void wbinvd(void) { asm volatile ("wbinvd"); @@ -93,7 +68,7 @@ static inline __attribute__((always_inline)) void enable_cache(void) { unsigned long cr0; cr0 = read_cr0(); - cr0 &= 0x9fffffff; + cr0 &= ~(CR0_CD | CR0_NW); write_cr0(cr0); }
@@ -102,7 +77,7 @@ static inline __attribute__((always_inline)) void disable_cache(void) /* Disable and write back the cache */ unsigned long cr0; cr0 = read_cr0(); - cr0 |= 0x40000000; + cr0 |= CR0_CD; wbinvd(); write_cr0(cr0); wbinvd(); diff --git a/src/include/cpu/x86/cr.h b/src/include/cpu/x86/cr.h new file mode 100644 index 0000000..1e31adf --- /dev/null +++ b/src/include/cpu/x86/cr.h @@ -0,0 +1,112 @@ + +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef CPU_X86_CR_H +#define CPU_X86_CR_H + +#if !defined(__ASSEMBLER__) + +#include <arch/cpu.h> + +/* ROMCC apparently chokes certain clobber registers. */ +#if defined(__ROMCC__) +#define COMPILER_BARRIER +#else +#define COMPILER_BARRIER "memory" +#endif + +static alwaysinline unsigned long read_cr0(void) +{ + unsigned long value; + __asm__ __volatile__ ( + "mov %%cr0, %0" + : "=r" (value) + : + : COMPILER_BARRIER + ); + return value; +} + +static alwaysinline void write_cr0(unsigned long data) +{ + __asm__ __volatile__ ( + "mov %0, %%cr0" + : + : "r" (data) + : COMPILER_BARRIER + ); +} + +static alwaysinline unsigned long read_cr4(void) +{ + unsigned long value; + __asm__ __volatile__ ( + "mov %%cr4, %0" + : "=r" (value) + : + : COMPILER_BARRIER + ); + return value; +} + +static alwaysinline void write_cr4(unsigned long data) +{ + __asm__ __volatile__ ( + "mov %0, %%cr4" + : + : "r" (data) + : COMPILER_BARRIER + ); +} + +#endif /* !defined(__ASSEMBLER__) */ + +/* CR0 flags */ +#define CR0_PE (1 << 0) +#define CR0_MP (1 << 1) +#define CR0_EM (1 << 2) +#define CR0_TS (1 << 3) +#define CR0_ET (1 << 4) +#define CR0_NE (1 << 5) +#define CR0_WP (1 << 16) +#define CR0_AM (1 << 18) +#define CR0_NW (1 << 29) +#define CR0_CD (1 << 30) +#define CR0_PG (1 << 31) + +/* CR4 flags */ +#define CR4_VME (1 << 0) +#define CR4_PVI (1 << 1) +#define CR4_TSD (1 << 2) +#define CR4_DE (1 << 3) +#define CR4_PSE (1 << 4) +#define CR4_PAE (1 << 5) +#define CR4_MCE (1 << 6) +#define CR4_PGE (1 << 7) +#define CR4_PCE (1 << 8) +#define CR4_OSFXSR (1 << 9) +#define CR4_OSXMMEXCPT (1 << 10) +#define CR4_VMXE (1 << 13) +#define CR4_SMXE (1 << 14) +#define CR4_FSGSBASE (1 << 16) +#define CR4_PCIDE (1 << 17) +#define CR4_OSXSAVE (1 << 18) +#define CR4_SMEP (1 << 20) + +#endif /* CPU_X86_CR_H */