2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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29 * from: @(#)param.h 5.8 (Berkeley) 6/28/91
33 #ifndef _MACHINE_PARAM_H_
34 #define _MACHINE_PARAM_H_
37 * Machine dependent constants for RISC-V.
40 #include <machine/_align.h>
42 #define STACKALIGNBYTES (16 - 1)
43 #define STACKALIGN(p) ((uint64_t)(p) & ~STACKALIGNBYTES)
45 #define __PCI_REROUTE_INTERRUPT
48 #define MACHINE "riscv"
52 /* Always use the hard-float arch for the kernel. */
53 #if !defined(_KERNEL) && defined(__riscv_float_abi_soft)
54 #define MACHINE_ARCH "riscv64sf"
56 #define MACHINE_ARCH "riscv64"
60 #define MACHINE_ARCHES "riscv64 riscv64sf"
75 #define ALIGNBYTES _ALIGNBYTES
76 #define ALIGN(p) _ALIGN(p)
78 * ALIGNED_POINTER is a boolean macro that checks whether an address
79 * is valid to fetch data elements of type t from on this architecture.
80 * This does not reflect the optimal alignment, just the possibility
81 * (within reasonable limits).
83 #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
86 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
87 * architecture. It should be used with appropriate caution.
89 #define CACHE_LINE_SHIFT 6
90 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
93 #define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */
94 #define PAGE_MASK (PAGE_SIZE - 1)
96 #define MAXPAGESIZES 3 /* maximum number of supported page sizes */
99 #define KSTACK_PAGES 4 /* pages of kernel stack (with pcb) */
102 #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
106 * Mach derived conversion macros
108 #define round_page(x) (((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
109 #define trunc_page(x) ((unsigned long)(x) & ~PAGE_MASK)
111 #define atop(x) ((unsigned long)(x) >> PAGE_SHIFT)
112 #define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT)
114 #define riscv_btop(x) ((unsigned long)(x) >> PAGE_SHIFT)
115 #define riscv_ptob(x) ((unsigned long)(x) << PAGE_SHIFT)
117 #define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024))
119 #endif /* !_MACHINE_PARAM_H_ */