1/*
2 *  linux/arch/m68k/sun3/config.c
3 *
4 *  Copyright (C) 1996,1997 Pekka Pietik{inen
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License.  See the file COPYING in the main directory of this archive
8 * for more details.
9 */
10
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/seq_file.h>
15#include <linux/tty.h>
16#include <linux/console.h>
17#include <linux/init.h>
18#include <linux/bootmem.h>
19
20#include <asm/oplib.h>
21#include <asm/setup.h>
22#include <asm/contregs.h>
23#include <asm/movs.h>
24#include <asm/pgtable.h>
25#include <asm/pgalloc.h>
26#include <asm/sun3-head.h>
27#include <asm/sun3mmu.h>
28#include <asm/rtc.h>
29#include <asm/machdep.h>
30#include <asm/idprom.h>
31#include <asm/intersil.h>
32#include <asm/irq.h>
33#include <asm/sections.h>
34#include <asm/segment.h>
35#include <asm/sun3ints.h>
36
37char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
38
39extern u32 sun3_gettimeoffset(void);
40static void sun3_sched_init(irq_handler_t handler);
41extern void sun3_get_model (char* model);
42extern int sun3_hwclk(int set, struct rtc_time *t);
43
44volatile char* clock_va;
45extern unsigned long availmem;
46unsigned long num_pages;
47
48static void sun3_get_hardware_list(struct seq_file *m)
49{
50	seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
51}
52
53void __init sun3_init(void)
54{
55	unsigned char enable_register;
56	int i;
57
58	m68k_machtype= MACH_SUN3;
59	m68k_cputype = CPU_68020;
60	m68k_fputype = FPU_68881; /* mc68881 actually */
61	m68k_mmutype = MMU_SUN3;
62	clock_va    =          (char *) 0xfe06000;	/* dark  */
63	sun3_intreg = (unsigned char *) 0xfe0a000;	/* magic */
64	sun3_disable_interrupts();
65
66	prom_init((void *)LINUX_OPPROM_BEGVM);
67
68	GET_CONTROL_BYTE(AC_SENABLE,enable_register);
69	enable_register |= 0x50; /* Enable FPU */
70	SET_CONTROL_BYTE(AC_SENABLE,enable_register);
71	GET_CONTROL_BYTE(AC_SENABLE,enable_register);
72
73	/* This code looks suspicious, because it doesn't subtract
74           memory belonging to the kernel from the available space */
75
76
77	memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));
78
79	/* Reserve important PMEGS */
80	/* FIXME: These should be probed instead of hardcoded */
81
82	for (i=0; i<8; i++)		/* Kernel PMEGs */
83		sun3_reserved_pmeg[i] = 1;
84
85	sun3_reserved_pmeg[247] = 1;	/* ROM mapping  */
86	sun3_reserved_pmeg[248] = 1;	/* AMD Ethernet */
87	sun3_reserved_pmeg[251] = 1;	/* VB area      */
88	sun3_reserved_pmeg[254] = 1;	/* main I/O     */
89
90	sun3_reserved_pmeg[249] = 1;
91	sun3_reserved_pmeg[252] = 1;
92	sun3_reserved_pmeg[253] = 1;
93	set_fs(KERNEL_DS);
94}
95
96/* Without this, Bad Things happen when something calls arch_reset. */
97static void sun3_reboot (void)
98{
99	prom_reboot ("vmlinux");
100}
101
102static void sun3_halt (void)
103{
104	prom_halt ();
105}
106
107/* sun3 bootmem allocation */
108
109static void __init sun3_bootmem_alloc(unsigned long memory_start,
110				      unsigned long memory_end)
111{
112	unsigned long start_page;
113
114	/* align start/end to page boundaries */
115	memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);
116	memory_end = memory_end & PAGE_MASK;
117
118	start_page = __pa(memory_start) >> PAGE_SHIFT;
119	num_pages = __pa(memory_end) >> PAGE_SHIFT;
120
121	high_memory = (void *)memory_end;
122	availmem = memory_start;
123
124	m68k_setup_node(0);
125	availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages);
126	availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK;
127
128	free_bootmem(__pa(availmem), memory_end - (availmem));
129}
130
131
132void __init config_sun3(void)
133{
134	unsigned long memory_start, memory_end;
135
136	printk("ARCH: SUN3\n");
137	idprom_init();
138
139	/* Subtract kernel memory from available memory */
140
141        mach_sched_init      =  sun3_sched_init;
142        mach_init_IRQ        =  sun3_init_IRQ;
143        mach_reset           =  sun3_reboot;
144	arch_gettimeoffset   =  sun3_gettimeoffset;
145	mach_get_model	     =  sun3_get_model;
146	mach_hwclk           =  sun3_hwclk;
147	mach_halt	     =  sun3_halt;
148	mach_get_hardware_list = sun3_get_hardware_list;
149
150	memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
151// PROM seems to want the last couple of physical pages. --m
152	memory_end   = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
153
154	m68k_num_memory=1;
155        m68k_memory[0].size=*(romvec->pv_sun3mem);
156
157	sun3_bootmem_alloc(memory_start, memory_end);
158}
159
160static void __init sun3_sched_init(irq_handler_t timer_routine)
161{
162	sun3_disable_interrupts();
163        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
164        intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
165	intersil_clear();
166        sun3_enable_irq(5);
167        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
168        sun3_enable_interrupts();
169        intersil_clear();
170}
171
172