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/memblock.h>
19#include <linux/platform_device.h>
20#include <linux/linkage.h>
21
22#include <asm/oplib.h>
23#include <asm/setup.h>
24#include <asm/contregs.h>
25#include <asm/movs.h>
26#include <asm/pgalloc.h>
27#include <asm/sun3-head.h>
28#include <asm/sun3mmu.h>
29#include <asm/machdep.h>
30#include <asm/machines.h>
31#include <asm/idprom.h>
32#include <asm/intersil.h>
33#include <asm/irq.h>
34#include <asm/sections.h>
35#include <asm/sun3ints.h>
36#include <asm/config.h>
37
38#include "sun3.h"
39
40char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
41
42static void sun3_sched_init(void);
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
53asmlinkage void __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_fc(USER_DATA);
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	/* align start/end to page boundaries */
113	memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);
114	memory_end = memory_end & PAGE_MASK;
115
116	max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT;
117
118	high_memory = (void *)memory_end;
119	availmem = memory_start;
120
121	m68k_setup_node(0);
122}
123
124
125void __init config_sun3(void)
126{
127	unsigned long memory_start, memory_end;
128
129	pr_info("ARCH: SUN3\n");
130	idprom_init();
131
132	/* Subtract kernel memory from available memory */
133
134        mach_sched_init      =  sun3_sched_init;
135        mach_init_IRQ        =  sun3_init_IRQ;
136        mach_reset           =  sun3_reboot;
137	mach_get_model	     =  sun3_get_model;
138	mach_hwclk           =  sun3_hwclk;
139	mach_halt	     =  sun3_halt;
140	mach_get_hardware_list = sun3_get_hardware_list;
141
142	memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
143// PROM seems to want the last couple of physical pages. --m
144	memory_end   = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
145
146	m68k_num_memory=1;
147        m68k_memory[0].size=*(romvec->pv_sun3mem);
148
149	sun3_bootmem_alloc(memory_start, memory_end);
150}
151
152static void __init sun3_sched_init(void)
153{
154	sun3_disable_interrupts();
155        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
156        intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
157	intersil_clear();
158        sun3_enable_irq(5);
159        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
160        sun3_enable_interrupts();
161        intersil_clear();
162}
163
164#if IS_ENABLED(CONFIG_SUN3_SCSI)
165
166static const struct resource sun3_scsi_vme_rsrc[] __initconst = {
167	{
168		.flags = IORESOURCE_IRQ,
169		.start = SUN3_VEC_VMESCSI0,
170		.end   = SUN3_VEC_VMESCSI0,
171	}, {
172		.flags = IORESOURCE_MEM,
173		.start = 0xff200000,
174		.end   = 0xff200021,
175	}, {
176		.flags = IORESOURCE_IRQ,
177		.start = SUN3_VEC_VMESCSI1,
178		.end   = SUN3_VEC_VMESCSI1,
179	}, {
180		.flags = IORESOURCE_MEM,
181		.start = 0xff204000,
182		.end   = 0xff204021,
183	},
184};
185
186/*
187 * Int: level 2 autovector
188 * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0>
189 */
190static const struct resource sun3_scsi_rsrc[] __initconst = {
191	{
192		.flags = IORESOURCE_IRQ,
193		.start = 2,
194		.end   = 2,
195	}, {
196		.flags = IORESOURCE_MEM,
197		.start = 0x00140000,
198		.end   = 0x0014001f,
199	},
200};
201
202static int __init sun3_platform_init(void)
203{
204	switch (idprom->id_machtype) {
205	case SM_SUN3 | SM_3_160:
206	case SM_SUN3 | SM_3_260:
207		platform_device_register_simple("sun3_scsi_vme", -1,
208			sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc));
209		break;
210	case SM_SUN3 | SM_3_50:
211	case SM_SUN3 | SM_3_60:
212		platform_device_register_simple("sun3_scsi", -1,
213			sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc));
214		break;
215	}
216	return 0;
217}
218
219arch_initcall(sun3_platform_init);
220
221#endif
222