diff options
| -rw-r--r-- | src/cpu/x86/mtrr/earlymtrr.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/cpu/x86/mtrr/earlymtrr.c b/src/cpu/x86/mtrr/earlymtrr.c index e8608fd9cc..f96b05061f 100644 --- a/src/cpu/x86/mtrr/earlymtrr.c +++ b/src/cpu/x86/mtrr/earlymtrr.c @@ -4,6 +4,8 @@ #include <cpu/cpu.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/msr.h> +#include <console/console.h> +#include <commonlib/bsd/helpers.h> /* Get first available variable MTRR. * Returns var# if available, else returns -1. @@ -34,6 +36,15 @@ void set_var_mtrr( /* Bit Bit 32-35 of MTRRphysMask should be set to 1 */ /* FIXME: It only support 4G less range */ msr_t basem, maskm; + + if (!IS_POWER_OF_2(size)) + printk(BIOS_ERR, "MTRR Error: size %#x is not a power of two\n", size); + if (size < 4 * KiB) + printk(BIOS_ERR, "MTRR Error: size %#x smaller than 4KiB\n", size); + if (base % size != 0) + printk(BIOS_ERR, "MTRR Error: base %#x must be aligned to size %#x\n", base, + size); + basem.lo = base | type; basem.hi = 0; wrmsr(MTRR_PHYS_BASE(reg), basem); |