cpu/x86/lapic: Replace LOCAL_APIC_ADDR references

Note that there are assumptions about LAPIC MMIO location
in both AMD and Intel sources in coreboot proper.

Change-Id: I2c668f5f9b93d170351c00d77d003c230900e0b4
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55194
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/x86/lapic/lapic.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <cpu/cpu.h>
 #include <cpu/x86/lapic.h>
 #include <cpu/x86/lapic_def.h>
 #include <cpu/x86/msr.h>
@@ -25,6 +26,11 @@ void disable_lapic(void)
 	wrmsr(LAPIC_BASE_MSR, msr);
 }
 
+uintptr_t cpu_get_lapic_addr(void)
+{
+	return LAPIC_DEFAULT_BASE;
+}
+
 /* See if I need to initialize the local APIC */
 static int need_lapic_init(void)
 {

src/cpu/x86/smm/smmhandler.S

@@ -126,8 +126,9 @@ untampered_lapic:
 	movw	%ax, %fs
 	movw	%ax, %gs
 
+	/* FIXME: Incompatible with X2APIC_SUPPORT. */
 	/* Get this CPU's LAPIC ID */
-	movl	$(LOCAL_APIC_ADDR | LAPIC_ID), %esi
+	movl	$(LAPIC_DEFAULT_BASE | LAPIC_ID), %esi
 	movl	(%esi), %ecx
 	shr	$24, %ecx