1d6d45e3c9
__ROMCC__ now means "Don't use prototypes, since romcc doesn't support them." __PRE_RAM__ means "Use simpler versions of functions, and no device tree." There are probably some places where both are tested, but only one is needed. Signed-off-by: Myles Watson <mylesgw@gmail.com> Acked-by: Peter Stuge <peter@stuge.se> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4921 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
48 lines
861 B
C
48 lines
861 B
C
#ifndef CPU_X86_CACHE
|
|
#define CPU_X86_CACHE
|
|
|
|
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 invd(void)
|
|
{
|
|
asm volatile("invd" ::: "memory");
|
|
}
|
|
static inline void wbinvd(void)
|
|
{
|
|
asm volatile ("wbinvd");
|
|
}
|
|
|
|
static inline void enable_cache(void)
|
|
{
|
|
unsigned long cr0;
|
|
cr0 = read_cr0();
|
|
cr0 &= 0x9fffffff;
|
|
write_cr0(cr0);
|
|
}
|
|
|
|
static inline void disable_cache(void)
|
|
{
|
|
/* Disable and write back the cache */
|
|
unsigned long cr0;
|
|
cr0 = read_cr0();
|
|
cr0 |= 0x40000000;
|
|
wbinvd();
|
|
write_cr0(cr0);
|
|
wbinvd();
|
|
}
|
|
|
|
#if !defined( __ROMCC__) && !defined(__PRE_RAM__) && defined (__GNUC__)
|
|
void x86_enable_cache(void);
|
|
#endif /* !__ROMCC__ */
|
|
|
|
#endif /* CPU_X86_CACHE */
|