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/*
* machine.h: Intel CPU specific definitions
*
* Leendert van Doorn, leendert@watson.ibm.com
* Copyright (c) 2005, International Business Machines Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*/
#ifndef __MACHINE_H__
#define __MACHINE_H__
/* the size of our stack (4KB) */
#define STACK_SIZE 8192
#define TSS_SELECTOR 0x08
#define CODE_SELECTOR 0x10
#define DATA_SELECTOR 0x18
#define CR0_PE (1 << 0)
#define CR0_EM (1 << 2)
#define CR0_TS (1 << 3)
#define CR0_NE (1 << 5)
#define CR0_PG (1 << 31)
#define CR4_VME (1 << 0)
#define CR4_PVI (1 << 1)
#define CR4_PSE (1 << 4)
#define EFLAGS_ZF (1 << 6)
#define EFLAGS_TF (1 << 8)
#define EFLAGS_IF (1 << 9)
#define EFLAGS_DF (1 << 10)
#define EFLAGS_IOPL (3 << 12)
#define EFLAGS_VM ((1 << 17) | EFLAGS_IOPL)
#define EFLAGS_VIF (1 << 19)
#define EFLAGS_VIP (1 << 20)
#define LOG_PGSIZE 12 /* log2(page size) */
#define LOG_PDSIZE 22 /* log2(page directory size) */
/* Derived constants */
#define PGSIZE (1 << LOG_PGSIZE) /* page size */
#define PGMASK (~(PGSIZE - 1)) /* page mask */
#define LPGSIZE (1 << LOG_PDSIZE) /* large page size */
#define LPGMASK (~(LPGSIZE - 1)) /* large page mask */
#ifdef TEST
#define PTE_P (1 << 0) /* Present */
#define PTE_RW (1 << 1) /* Read/Write */
#define PTE_US (1 << 2) /* User/Supervisor */
#define PTE_PS (1 << 7) /* Page Size */
#endif
/* Programmable Interrupt Contoller (PIC) defines */
#define PIC_MASTER 0x20
#define PIC_SLAVE 0xA0
#define PIC_CMD 0 /* command */
#define PIC_ISR 0 /* interrupt status */
#define PIC_IMR 1 /* interrupt mask */
#ifndef __ASSEMBLY__
struct dtr {
unsigned short size;
unsigned long base __attribute__ ((packed));
};
struct tss {
unsigned short prev_link;
unsigned short _1;
unsigned long esp0;
unsigned short ss0;
unsigned short _2;
unsigned long esp1;
unsigned short ss1;
unsigned short _3;
unsigned long esp2;
unsigned short ss2;
unsigned short _4;
unsigned long cr3;
unsigned long eip;
unsigned long eflags;
unsigned long eax;
unsigned long ecx;
unsigned long edx;
unsigned long ebx;
unsigned long esi;
unsigned long edi;
unsigned long esp;
unsigned long ebp;
unsigned long es;
unsigned long cs;
unsigned long ss;
unsigned long ds;
unsigned long fs;
unsigned long gs;
unsigned short ldt_segment;
unsigned short _5;
unsigned short _6;
unsigned short iomap_base;
#ifdef ENABLE_VME
unsigned long int_redir[8];
#endif
unsigned char iomap[8192];
};
static inline void
outw(unsigned short addr, unsigned short val)
{
__asm__ __volatile__ ("outw %%ax, %%dx" :: "d"(addr), "a"(val));
}
static inline void
outb(unsigned short addr, unsigned char val)
{
__asm__ __volatile__ ("outb %%al, %%dx" :: "d"(addr), "a"(val));
}
static inline unsigned char
inb(unsigned short addr)
{
unsigned char val;
__asm__ __volatile__ ("inb %w1,%0" : "=a" (val) : "Nd" (addr));
return val;
}
static inline unsigned
get_cmos(int reg)
{
outb(0x70, reg);
return inb(0x71);
}
static inline unsigned
get_cr0(void)
{
unsigned rv;
__asm__ __volatile__("movl %%cr0, %0" : "=r"(rv));
return rv;
}
static inline void
set_cr0(unsigned value)
{
__asm__ __volatile__(
"movl %0, %%cr0\n"
"jmp 1f\n"
"1: nop\n"
: /* no outputs */
: "r"(value)
);
}
static inline unsigned
get_cr2(void)
{
unsigned rv;
__asm__ __volatile__("movl %%cr2, %0" : "=r"(rv));
return rv;
}
static inline unsigned
get_cr4(void)
{
unsigned rv;
__asm__ __volatile__("movl %%cr4, %0" : "=r"(rv));
return rv;
}
static inline void
set_cr3(unsigned addr)
{
__asm__ __volatile__("movl %0, %%cr3" : /* no outputs */ : "r"(addr));
}
static inline void
set_cr4(unsigned value)
{
__asm__ __volatile__("movl %0, %%cr4" : /* no outputs */ : "r"(value));
}
#ifdef TEST
static inline void
breakpoint(void)
{
outw(0x8A00, 0x8AE0);
}
#endif /* TEST */
#endif /* __ASSEMBLY__ */
#endif /* __MACHINE_H__ */
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