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-rw-r--r--src/cpu/x86/mtrr/mtrr.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/src/cpu/x86/mtrr/mtrr.c b/src/cpu/x86/mtrr/mtrr.c
index 840f9d3909..2e45c4818c 100644
--- a/src/cpu/x86/mtrr/mtrr.c
+++ b/src/cpu/x86/mtrr/mtrr.c
@@ -228,7 +228,12 @@ static unsigned int range_to_mtrr(unsigned int reg,
unsigned long range_startk, unsigned long range_sizek,
unsigned long next_range_startk, unsigned char type, unsigned address_bits)
{
- if (!range_sizek || (reg >= BIOS_MTRRS)) {
+ if (!range_sizek) {
+ printk_debug("range_to_mtrr called for empty range\n");
+ return reg;
+ }
+ if (reg >= BIOS_MTRRS) {
+ printk_err("Running out of variable MTRRs!\n");
return reg;
}
while(range_sizek) {
@@ -249,8 +254,10 @@ static unsigned int range_to_mtrr(unsigned int reg,
set_var_mtrr(reg++, range_startk, sizek, type, address_bits);
range_startk += sizek;
range_sizek -= sizek;
- if (reg >= BIOS_MTRRS)
+ if (reg >= BIOS_MTRRS) {
+ printk_err("Running out of variable MTRRs!\n");
break;
+ }
}
return reg;
}