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/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_PROCESSOR_H_
#define __ASM_PROCESSOR_H_ 1
#define X86_GDT_ENTRY_SIZE 8
#define X86_GDT_ENTRY_NULL 0
#define X86_GDT_ENTRY_UNUSED 1
#define X86_GDT_ENTRY_32BIT_CS 2
#define X86_GDT_ENTRY_32BIT_DS 3
#define X86_GDT_ENTRY_32BIT_FS 4
#define X86_GDT_ENTRY_16BIT_CS 5
#define X86_GDT_ENTRY_16BIT_DS 6
#define X86_GDT_ENTRY_16BIT_FLAT_CS 7
#define X86_GDT_ENTRY_16BIT_FLAT_DS 8
#define X86_GDT_NUM_ENTRIES 9
#define X86_GDT_SIZE (X86_GDT_NUM_ENTRIES * X86_GDT_ENTRY_SIZE)
/* Length of the public header on Intel microcode blobs */
#define UCODE_HEADER_LEN 0x30
#ifndef __ASSEMBLY__
/*
* This register is documented in (for example) the Intel Atom Processor E3800
* Product Family Datasheet in "PCU - Power Management Controller (PMC)".
*
* RST_CNT: Reset Control Register (RST_CNT) Offset cf9.
*
* The naming follows Intel's naming.
*/
#define IO_PORT_RESET 0xcf9
enum {
SYS_RST = 1 << 1, /* 0 for soft reset, 1 for hard reset */
RST_CPU = 1 << 2, /* initiate reset */
FULL_RST = 1 << 3, /* full power cycle */
};
/**
* x86_full_reset() - reset everything: perform a full power cycle
*/
void x86_full_reset(void);
static inline __attribute__((always_inline)) void cpu_hlt(void)
{
asm("hlt");
}
static inline ulong cpu_get_sp(void)
{
ulong result;
asm volatile(
"mov %%esp, %%eax"
: "=a" (result));
return result;
}
#endif /* __ASSEMBLY__ */
#endif
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