LXR uboot/arch/x86/include/asm/processor.h

   1/*
   2 * (C) Copyright 2002
   3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#ifndef __ASM_PROCESSOR_H_
   9#define __ASM_PROCESSOR_H_ 1
  10
  11#define X86_GDT_ENTRY_SIZE              8
  12
  13#define X86_GDT_ENTRY_NULL              0
  14#define X86_GDT_ENTRY_UNUSED            1
  15#define X86_GDT_ENTRY_32BIT_CS          2
  16#define X86_GDT_ENTRY_32BIT_DS          3
  17#define X86_GDT_ENTRY_32BIT_FS          4
  18#define X86_GDT_ENTRY_16BIT_CS          5
  19#define X86_GDT_ENTRY_16BIT_DS          6
  20#define X86_GDT_ENTRY_16BIT_FLAT_CS     7
  21#define X86_GDT_ENTRY_16BIT_FLAT_DS     8
  22#define X86_GDT_NUM_ENTRIES             9
  23
  24#define X86_GDT_SIZE            (X86_GDT_NUM_ENTRIES * X86_GDT_ENTRY_SIZE)
  25
  26/* Length of the public header on Intel microcode blobs */
  27#define UCODE_HEADER_LEN        0x30
  28
  29#ifndef __ASSEMBLY__
  30
  31/*
  32 * This register is documented in (for example) the Intel Atom Processor E3800
  33 * Product Family Datasheet in "PCU - Power Management Controller (PMC)".
  34 *
  35 * RST_CNT: Reset Control Register (RST_CNT) Offset cf9.
  36 *
  37 * The naming follows Intel's naming.
  38 */
  39#define IO_PORT_RESET           0xcf9
  40
  41enum {
  42        SYS_RST         = 1 << 1,       /* 0 for soft reset, 1 for hard reset */
  43        RST_CPU         = 1 << 2,       /* initiate reset */
  44        FULL_RST        = 1 << 3,       /* full power cycle */
  45};
  46
  47/**
  48 * x86_full_reset() - reset everything: perform a full power cycle
  49 */
  50void x86_full_reset(void);
  51
  52static inline __attribute__((always_inline)) void cpu_hlt(void)
  53{
  54        asm("hlt");
  55}
  56
  57static inline ulong cpu_get_sp(void)
  58{
  59        ulong result;
  60
  61        asm volatile(
  62                "mov %%esp, %%eax"
  63                : "=a" (result));
  64        return result;
  65}
  66
  67#endif /* __ASSEMBLY__ */
  68
  69#endif
  70