dm: x86: ivybridge: Convert graphics init to use DM PCI API

[oweals/u-boot.git] / arch / x86 / include / asm / cpu.h

diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index c8392915f1dbe87ce741946970682334281d1c85..c70183ccefffba8effd9fdb080210328285b03a3 100644 (file)
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -27,6 +27,24 @@ enum {
        X86_VENDOR_UNKNOWN = 0xff
 };
 
+/* Global descriptor table (GDT) bits */
+enum {
+       GDT_4KB                 = 1ULL << 55,
+       GDT_32BIT               = 1ULL << 54,
+       GDT_LONG                = 1ULL << 53,
+       GDT_PRESENT             = 1ULL << 47,
+       GDT_NOTSYS              = 1ULL << 44,
+       GDT_CODE                = 1ULL << 43,
+       GDT_LIMIT_LOW_SHIFT     = 0,
+       GDT_LIMIT_LOW_MASK      = 0xffff,
+       GDT_LIMIT_HIGH_SHIFT    = 48,
+       GDT_LIMIT_HIGH_MASK     = 0xf,
+       GDT_BASE_LOW_SHIFT      = 16,
+       GDT_BASE_LOW_MASK       = 0xffff,
+       GDT_BASE_HIGH_SHIFT     = 56,
+       GDT_BASE_HIGH_MASK      = 0xf,
+};
+
 struct cpuid_result {
        uint32_t eax;
        uint32_t ebx;
@@ -151,6 +169,11 @@ static inline int flag_is_changeable_p(uint32_t flag)
        return ((f1^f2) & flag) != 0;
 }
 
+static inline void mfence(void)
+{
+       __asm__ __volatile__("mfence" : : : "memory");
+}
+
 /**
  * cpu_enable_paging_pae() - Enable PAE-paging
  *
@@ -206,6 +229,15 @@ char *cpu_get_name(char *name);
  */
 void cpu_call64(ulong pgtable, ulong setup_base, ulong target);
 
+/**
+ * cpu_call32() - Jump to a 32-bit entry point
+ *
+ * @code_seg32:        32-bit code segment to use (GDT offset, e.g. 0x20)
+ * @target:    Pointer to the start of the 32-bit U-Boot image/entry point
+ * @table:     Pointer to start of info table to pass to U-Boot
+ */
+void cpu_call32(ulong code_seg32, ulong target, ulong table);
+
 /**
  * cpu_jump_to_64bit() - Jump to a 64-bit Linux kernel
  *