diff options
| -rw-r--r-- | src/cpu/x86/mtrr/earlymtrr.c | 14 | ||||
| -rw-r--r-- | src/include/cpu/x86/mtrr.h | 1 |
2 files changed, 15 insertions, 0 deletions
diff --git a/src/cpu/x86/mtrr/earlymtrr.c b/src/cpu/x86/mtrr/earlymtrr.c index 4d14a8de08..e4003591f9 100644 --- a/src/cpu/x86/mtrr/earlymtrr.c +++ b/src/cpu/x86/mtrr/earlymtrr.c @@ -42,3 +42,17 @@ void set_var_mtrr( maskm.hi = (1 << (cpu_phys_address_size() - 32)) - 1; wrmsr(MTRR_PHYS_MASK(reg), maskm); } + +void clear_all_var_mtrr(void) +{ + msr_t mtrr = {0, 0}; + int vcnt; + int i; + + vcnt = get_var_mtrr_count(); + + for (i = 0; i < vcnt; i++) { + wrmsr(MTRR_PHYS_MASK(i), mtrr); + wrmsr(MTRR_PHYS_BASE(i), mtrr); + } +} diff --git a/src/include/cpu/x86/mtrr.h b/src/include/cpu/x86/mtrr.h index 07db3cb606..50148ffd35 100644 --- a/src/include/cpu/x86/mtrr.h +++ b/src/include/cpu/x86/mtrr.h @@ -107,6 +107,7 @@ static inline int get_var_mtrr_count(void) void set_var_mtrr(unsigned int reg, unsigned int base, unsigned int size, unsigned int type); int get_free_var_mtrr(void); +void clear_all_var_mtrr(void); asmlinkage void display_mtrrs(void); |