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
40 char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
41
42 static void sun3_sched_init(void);
43
44 volatile char* clock_va;
45 extern unsigned long availmem;
46 unsigned long num_pages;
47
48 static void sun3_get_hardware_list(struct seq_file *m)
49 {
50 seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
51 }
52
53 asmlinkage 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. */
97 static void sun3_reboot (void)
98 {
99 prom_reboot ("vmlinux");
100 }
101
102 static void sun3_halt (void)
103 {
104 prom_halt ();
105 }
106
107 /* sun3 bootmem allocation */
108
109 static 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
125 void __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
152 static 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
166 static 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 */
190 static 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
202 static 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
219 arch_initcall(sun3_platform_init);
220
221 #endif
222
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.