x86: flatten hierarchy

It never made sense to have bootblock_* in init, but
pirq_routing.c in boot, and some ld scripts on the main
level while others live in subdirectories.

This patch flattens the directory hierarchy and makes
x86 more similar to the other architectures.

Change-Id: I4056038fe7813e4d3d3042c441e7ab6076a36384
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10901
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/arch/x86/cpu_common.c

@@ -0,0 +1,65 @@
+#include <console/console.h>
+#include <cpu/cpu.h>
+#include <arch/io.h>
+#include <string.h>
+#include <cpu/x86/mtrr.h>
+#include <cpu/x86/msr.h>
+#include <cpu/x86/lapic.h>
+#include <arch/cpu.h>
+#include <device/path.h>
+#include <device/device.h>
+#include <smp/spinlock.h>
+
+#ifndef __x86_64__
+/* Standard macro to see if a specific flag is changeable */
+static inline int flag_is_changeable_p(uint32_t flag)
+{
+	uint32_t f1, f2;
+
+	asm(
+		"pushfl\n\t"
+		"pushfl\n\t"
+		"popl %0\n\t"
+		"movl %0,%1\n\t"
+		"xorl %2,%0\n\t"
+		"pushl %0\n\t"
+		"popfl\n\t"
+		"pushfl\n\t"
+		"popl %0\n\t"
+		"popfl\n\t"
+		: "=&r" (f1), "=&r" (f2)
+		: "ir" (flag));
+	return ((f1^f2) & flag) != 0;
+}
+
+/* Probe for the CPUID instruction */
+int cpu_have_cpuid(void)
+{
+	return flag_is_changeable_p(X86_EFLAGS_ID);
+}
+
+#else
+
+int cpu_have_cpuid(void)
+{
+	return 1;
+}
+#endif
+
+int cpu_cpuid_extended_level(void)
+{
+	return cpuid_eax(0x80000000);
+}
+
+int cpu_phys_address_size(void)
+{
+	if (!(cpu_have_cpuid()))
+		return 32;
+
+	if (cpu_cpuid_extended_level() >= 0x80000008)
+		return cpuid_eax(0x80000008) & 0xff;
+
+	if (cpuid_edx(1) & (CPUID_FEATURE_PAE | CPUID_FEATURE_PSE36))
+		return 36;
+	return 32;
+}