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Annotation of prex-old/sys/arch/i386/pc/platform.h, Revision 1.1.1.1

1.1       nbrk        1: /*
                      2:  * Copyright (c) 2007, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: #ifndef _PC_PLATFORM_H
                     31: #define _PC_PLATFORM_H
                     32:
                     33: /*
                     34:  * Memory location
                     35:  */
                     36:
                     37: #ifdef CONFIG_MMU
                     38: #define PAGE_OFFSET    0x80000000
                     39: #else
                     40: #define PAGE_OFFSET    0x00000000
                     41: #endif
                     42:
                     43: #define KERNEL_BASE    PAGE_OFFSET
                     44: #define KERNEL_MAX     0xffffffff
                     45: #define USER_BASE      0x00000000
                     46: #define USER_MAX       0x80000000
                     47:
                     48: #define BOOT_PTE0      0x00001000
                     49: #define INT_STACK      0x00001000
                     50: #define BOOT_INFO      0x00002000
                     51: #define BOOT_STACK     0x00002800
                     52: #define KERNEL_PGD     0x00003000
                     53:
                     54: #ifdef CONFIG_MMU
                     55: #define RESERVED_BASE  0x00000000
                     56: #define RESERVED_MAX   0x00004000
                     57: #else
                     58: #define RESERVED_BASE  0x00000000
                     59: #define RESERVED_MAX   0x00003000
                     60: #endif
                     61:
                     62:
                     63: #ifndef __ASSEMBLY__
                     64:
                     65: /*
                     66:  * Page mapping
                     67:  */
                     68: #define phys_to_virt(p_addr)   (void *)((u_long)(p_addr) + PAGE_OFFSET)
                     69: #define virt_to_phys(v_addr)   (void *)((u_long)(v_addr) - PAGE_OFFSET)
                     70:
                     71: /*
                     72:  * Kernel/User Locations
                     73:  */
                     74: #if KERNEL_BASE == 0
                     75: #define kern_area(addr)                1
                     76: #else
                     77: #define kern_area(addr)                ((u_long)(addr) >= (u_long)KERNEL_BASE)
                     78: #endif
                     79: #define user_area(addr)                ((u_long)(addr) < (u_long)USER_MAX)
                     80:
                     81: /*
                     82:  * Interrupt
                     83:  */
                     84: #define NIRQS          16              /* number of interrupt vectors */
                     85:
                     86: #define interrupt_enable()     __asm__ __volatile__("sti"::)
                     87: #define interrupt_disable()    __asm__ __volatile__("cli"::)
                     88:
                     89: static __inline void
                     90: interrupt_save(int *sts)
                     91: {
                     92:        register u_long eflags;
                     93:        __asm__ __volatile__(
                     94:                "pushfl\n\t"
                     95:                "popl %0\n\t"
                     96:                :"=r" (eflags));
                     97:        *sts = (int)(eflags & 0x200);
                     98: }
                     99:
                    100: static __inline void
                    101: interrupt_restore(int sts)
                    102: {
                    103:        __asm__ __volatile__(
                    104:                "pushfl\n\t"
                    105:                "popl %%eax\n\t"
                    106:                "andl $0xfffffdff, %%eax\n\t"
                    107:                "orl %0, %%eax\n\t"
                    108:                "pushl %%eax\n\t"
                    109:                "popfl\n\t"
                    110:                :
                    111:                :"r" (sts)
                    112:                :"eax");
                    113: }
                    114:
                    115: extern void interrupt_mask(int);
                    116: extern void interrupt_unmask(int, int);
                    117: extern void interrupt_setup(int, int);
                    118: extern void interrupt_init(void);
                    119:
                    120: /* Interrupt mode for interrupt_setup() */
                    121: #define IMODE_EDGE     0               /* edge trigger */
                    122: #define IMODE_LEVEL    1               /* level trigger */
                    123:
                    124: extern void clock_init(void);
                    125:
                    126: extern void diag_init(void);
                    127: extern void diag_print(char *);
                    128:
                    129: #define machine_idle() __asm__ __volatile__("sti; hlt")
                    130: extern void machine_reset(void);
                    131: extern void machine_init(void);
                    132:
                    133: #endif /* !__ASSEMBLY__ */
                    134: #endif /* !_PC_PLATFORM_H */