X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=arch%2Fx86%2Fcpu%2Fmtrr.c;h=5d36b3e0204d63cd9a15d2829cd9c96d48100fe2;hb=8b097916faa20f04ff4b0147ebcf0331204ec96b;hp=d5a825d1815edbee282d4b12a7c90b4dedc3c09c;hpb=4608f37918e5d93d6b2b6909b325a5e6fb0a2346;p=oweals%2Fu-boot.git

diff --git a/arch/x86/cpu/mtrr.c b/arch/x86/cpu/mtrr.c
index d5a825d181..5d36b3e020 100644
--- a/arch/x86/cpu/mtrr.c
+++ b/arch/x86/cpu/mtrr.c
@@ -17,9 +17,14 @@
 #include <asm/msr.h>
 #include <asm/mtrr.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 /* Prepare to adjust MTRRs */
 void mtrr_open(struct mtrr_state *state)
 {
+	if (!gd->arch.has_mtrr)
+		return;
+
 	state->enable_cache = dcache_status();
 
 	if (state->enable_cache)
@@ -31,6 +36,9 @@ void mtrr_open(struct mtrr_state *state)
 /* Clean up after adjusting MTRRs, and enable them */
 void mtrr_close(struct mtrr_state *state)
 {
+	if (!gd->arch.has_mtrr)
+		return;
+
 	wrmsrl(MTRR_DEF_TYPE_MSR, state->deftype | MTRR_DEF_TYPE_EN);
 	if (state->enable_cache)
 		enable_caches();
@@ -43,6 +51,9 @@ int mtrr_commit(bool do_caches)
 	uint64_t mask;
 	int i;
 
+	if (!gd->arch.has_mtrr)
+		return -ENOSYS;
+
 	mtrr_open(&state);
 	for (i = 0; i < gd->arch.mtrr_req_count; i++, req++) {
 		mask = ~(req->size - 1);
@@ -64,6 +75,9 @@ int mtrr_add_request(int type, uint64_t start, uint64_t size)
 	struct mtrr_request *req;
 	uint64_t mask;
 
+	if (!gd->arch.has_mtrr)
+		return -ENOSYS;
+
 	if (gd->arch.mtrr_req_count == MAX_MTRR_REQUESTS)
 		return -ENOSPC;
 	req = &gd->arch.mtrr_req[gd->arch.mtrr_req_count++];