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      1 /*	$NetBSD: machdep.h,v 1.20 2026/08/21 14:01:16 tls Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matthew Fredette.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Definitions for the hppa that are completely private
     34  * to the machine-dependent code.  Anything needed by
     35  * machine-independent code is covered in cpu.h or in
     36  * other headers.
     37  */
     38 
     39 /*
     40  * XXX there is a lot of stuff in various headers under
     41  * hppa/include, and a lot of one-off `extern's in C files
     42  * that could probably be moved here.
     43  */
     44 
     45 #ifdef _KERNEL
     46 
     47 #ifdef _KERNEL_OPT
     48 #include "opt_useleds.h"
     49 #endif
     50 
     51 /* The primary (aka monarch) CPU HPA */
     52 extern hppa_hpa_t hppa_mcpuhpa;
     53 
     54 /*
     55  * cache configuration, for most machines is the same
     56  * numbers, so it makes sense to do defines w/ numbers depending
     57  * on configured CPU types in the kernel.
     58  */
     59 extern int icache_stride, icache_line_mask;
     60 extern int dcache_stride, dcache_line_mask;
     61 
     62 extern vaddr_t vmmap;	/* XXX - See mem.c */
     63 
     64 /* Kernel virtual address space available: */
     65 extern vaddr_t virtual_start, virtual_end;
     66 
     67 /* Total physical pages, and low reserved physical pages. */
     68 extern int totalphysmem;
     69 extern int availphysmem;
     70 extern int resvmem;
     71 
     72 /* BTLB minimum and maximum sizes, in pages. */
     73 extern u_int hppa_btlb_size_min;
     74 extern u_int hppa_btlb_size_max;
     75 
     76 /* FPU variables and functions. */
     77 extern int fpu_present;
     78 extern u_int fpu_version;
     79 extern u_int fpu_csw;
     80 void hppa_fpu_bootstrap(u_int);
     81 void hppa_fpu_flush(struct lwp *);
     82 void hppa_fpu_emulate(struct trapframe *, struct lwp *, u_int);
     83 void hppa_fpu_commit(struct lwp *);
     84 
     85 /* Set up of space registers and protection IDs */
     86 void hppa_setvmspace(struct lwp *);
     87 
     88 /* Interrupt dispatching. */
     89 void hppa_intr(struct trapframe *);
     90 
     91 /* Special pmap functions. */
     92 void pmap_redzone(vaddr_t, vaddr_t, int);
     93 
     94 /* Functions to write low memory and the kernel text. */
     95 void hppa_ktext_stw(vaddr_t, int);
     96 void hppa_ktext_stb(vaddr_t, char);
     97 
     98 /* Machine check handling. */
     99 extern u_int os_hpmc[8];
    100 extern u_int os_hpmc_cont;
    101 extern u_int os_hpmc_cont_end;
    102 extern u_int os_hpmc_checksum[1];
    103 
    104 int os_toc(void);
    105 extern u_int os_toc_end;
    106 extern u_int os_toc_checksum[1];
    107 
    108 void hppa_machine_check(int);
    109 
    110 /* BTLB handling. */
    111 int hppa_btlb_insert(pa_space_t, vaddr_t, paddr_t, vsize_t *, u_int);
    112 int hppa_btlb_reload(void);
    113 int hppa_btlb_purge(pa_space_t, vaddr_t, vsize_t *);
    114 
    115 /* The LEDs. */
    116 #define	HPPA_LED_NETSND		(0)
    117 #define	HPPA_LED_NETRCV		(1)
    118 #define	HPPA_LED_DISK		(2)
    119 #define	HPPA_LED_HEARTBEAT	(3)
    120 #define	_HPPA_LEDS_BLINKABLE	(4)
    121 #define	_HPPA_LEDS_COUNT	(8)
    122 
    123 /* This forcefully reboots the machine. */
    124 void cpu_die(void);
    125 
    126 /* These map and unmap page zero. */
    127 int hppa_pagezero_map(void);
    128 void hppa_pagezero_unmap(int);
    129 
    130 /* Blinking the LEDs. */
    131 #ifdef USELEDS
    132 #define	_HPPA_LED_FREQ		(16)
    133 extern volatile uint8_t *machine_ledaddr;
    134 extern int machine_ledword, machine_leds;
    135 extern int _hppa_led_on_cycles[];
    136 #define hppa_led_blink(i)			\
    137 do {						\
    138 	if (_hppa_led_on_cycles[i] == -1)	\
    139 		_hppa_led_on_cycles[i] = 1;	\
    140 } while (/* CONSTCOND */ 0)
    141 #define hppa_led_on(i, ms)			\
    142 do {						\
    143 	_hppa_led_on_cycles[i] = (((ms) * _HPPA_LED_FREQ) / 1000); \
    144 } while (/* CONSTCOND */ 0)
    145 void hppa_led_ctl(int, int, int);
    146 #else  /* !USELEDS */
    147 #define hppa_led_blink(i)
    148 #define hppa_led_on(i, ms)
    149 #define hppa_led_ctl(off, on, toggle)
    150 #endif /* !USELEDS */
    151 
    152 #endif /* _KERNEL */
    153