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