diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/p6/mtrr.c | 35 |
1 files changed, 2 insertions, 33 deletions
diff --git a/src/cpu/p6/mtrr.c b/src/cpu/p6/mtrr.c index 77218e91da..ac6fd1db37 100644 --- a/src/cpu/p6/mtrr.c +++ b/src/cpu/p6/mtrr.c @@ -104,8 +104,7 @@ static void intel_set_var_mtrr(unsigned int reg, unsigned long basek, unsigned l if (sizek < 4*1024*1024) { mask.hi = ADDRESS_MASK_HIGH; mask.lo = ~((sizek << 10) -1); - } - else { + } else { mask.hi = ADDRESS_MASK_HIGH & (~((sizek >> 22) -1)); mask.lo = 0; } @@ -132,36 +131,6 @@ static void intel_set_var_mtrr(unsigned int reg, unsigned long basek, unsigned l enable_cache(); } -/* setting variable mtrr, comes from linux kernel source */ -void set_var_mtrr(unsigned int reg, unsigned long base, unsigned long size, unsigned char type) -{ - if (reg >= 8) - return; - - // it is recommended that we disable and enable cache when we - // do this. - disable_cache(); - if (size == 0) { - /* The invalid bit is kept in the mask, so we simply clear the - relevant mask register to disable a range. */ - msr_t zero; - zero.lo = zero.hi = 0; - wrmsr (MTRRphysMask_MSR(reg), zero); - } else { - /* Bit 32-35 of MTRRphysMask should be set to 1 */ - msr_t basem, maskm; - basem.lo = base | type; - basem.hi = 0; - maskm.lo = ~(size - 1) | 0x800; - maskm.hi = 0x0F; - wrmsr (MTRRphysBase_MSR(reg), basem); - wrmsr (MTRRphysMask_MSR(reg), maskm); - } - - // turn cache back on. - enable_cache(); -} - /* fms: find most sigificant bit set, stolen from Linux Kernel Source. */ static inline unsigned int fms(unsigned int x) { @@ -281,7 +250,7 @@ static unsigned int range_to_mtrr(unsigned int reg, } sizek = 1 << align; printk_debug("Setting variable MTRR %d, base: %4dMB, range: %4dMB, type WB\n", - reg, range_startk >>10, sizek >> 10); + reg, range_startk >>10, sizek >> 10); intel_set_var_mtrr(reg++, range_startk, sizek, MTRR_TYPE_WRBACK); range_startk += sizek; range_sizek -= sizek; |