On Mon, 05 Jun 2006 13:03:34 -0700 Junio C Hamano wrote:
> Thomas Glanzmann <sithglan@xxxxxxxxxxxxxxxxxxxx> writes:
>
> > I am looking for the symbol CR4_FEATURES_ADDR which must be gone in one
> > of the last kernel revision. Now how I do use pickaxe to track any
> > changes that involve my missing symbol? Or is there a better way to
> > track that change down?
>
> None of the major recent versions seem to have the symbol.
>
> : gitster; git grep -e CR4_FEATURES_ADDR \
> v2.6.12-rc2 v2.6.12 v2.6.13 v2.6.14 v2.6.15 \
> v2.6.16
>
> and I did not get any google hits for "CR4_FEATURES_ADDR". Are
> you spelling it right?
include/asm-i386/processor.h has names like:
/*
* Intel CPU features in CR4
*/
#define X86_CR4_VME 0x0001 /* enable vm86 extensions */
#define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */
#define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */
#define X86_CR4_DE 0x0008 /* enable debugging extensions */
#define X86_CR4_PSE 0x0010 /* enable page size extensions */
#define X86_CR4_PAE 0x0020 /* enable physical address extensions */
#define X86_CR4_MCE 0x0040 /* Machine check enable */
#define X86_CR4_PGE 0x0080 /* enable global pages */
#define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */
#define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */
#define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */
extern unsigned long mmu_cr4_features;
static inline void set_in_cr4 (unsigned long mask)
{
unsigned cr4;
mmu_cr4_features |= mask;
cr4 = read_cr4();
cr4 |= mask;
write_cr4(cr4);
}
static inline void clear_in_cr4 (unsigned long mask)
{
unsigned cr4;
mmu_cr4_features &= ~mask;
cr4 = read_cr4();
cr4 &= ~mask;
write_cr4(cr4);
}
but nothing exactly like you asked about.
---
~Randy
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