/*
* Copyright (c) 2007, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _PC_PLATFORM_H
#define _PC_PLATFORM_H
/*
* Memory location
*/
#ifdef CONFIG_MMU
#define PAGE_OFFSET 0x80000000
#else
#define PAGE_OFFSET 0x00000000
#endif
#define KERNEL_BASE PAGE_OFFSET
#define KERNEL_MAX 0xffffffff
#define USER_BASE 0x00000000
#define USER_MAX 0x80000000
#define BOOT_PTE0 0x00001000
#define INT_STACK 0x00001000
#define BOOT_INFO 0x00002000
#define BOOT_STACK 0x00002800
#define KERNEL_PGD 0x00003000
#ifdef CONFIG_MMU
#define RESERVED_BASE 0x00000000
#define RESERVED_MAX 0x00004000
#else
#define RESERVED_BASE 0x00000000
#define RESERVED_MAX 0x00003000
#endif
#ifndef __ASSEMBLY__
/*
* Page mapping
*/
#define phys_to_virt(p_addr) (void *)((u_long)(p_addr) + PAGE_OFFSET)
#define virt_to_phys(v_addr) (void *)((u_long)(v_addr) - PAGE_OFFSET)
/*
* Kernel/User Locations
*/
#if KERNEL_BASE == 0
#define kern_area(addr) 1
#else
#define kern_area(addr) ((u_long)(addr) >= (u_long)KERNEL_BASE)
#endif
#define user_area(addr) ((u_long)(addr) < (u_long)USER_MAX)
/*
* Interrupt
*/
#define NIRQS 16 /* number of interrupt vectors */
#define interrupt_enable() __asm__ __volatile__("sti"::)
#define interrupt_disable() __asm__ __volatile__("cli"::)
static __inline void
interrupt_save(int *sts)
{
register u_long eflags;
__asm__ __volatile__(
"pushfl\n\t"
"popl %0\n\t"
:"=r" (eflags));
*sts = (int)(eflags & 0x200);
}
static __inline void
interrupt_restore(int sts)
{
__asm__ __volatile__(
"pushfl\n\t"
"popl %%eax\n\t"
"andl $0xfffffdff, %%eax\n\t"
"orl %0, %%eax\n\t"
"pushl %%eax\n\t"
"popfl\n\t"
:
:"r" (sts)
:"eax");
}
extern void interrupt_mask(int);
extern void interrupt_unmask(int, int);
extern void interrupt_setup(int, int);
extern void interrupt_init(void);
/* Interrupt mode for interrupt_setup() */
#define IMODE_EDGE 0 /* edge trigger */
#define IMODE_LEVEL 1 /* level trigger */
extern void clock_init(void);
extern void diag_init(void);
extern void diag_print(char *);
#define machine_idle() __asm__ __volatile__("sti; hlt")
extern void machine_reset(void);
extern void machine_init(void);
#endif /* !__ASSEMBLY__ */
#endif /* !_PC_PLATFORM_H */