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
21 #include <asm/oplib.h>
22 #include <asm/setup.h>
23 #include <asm/contregs.h>
24 #include <asm/movs.h>
25 #include <asm/pgalloc.h>
26 #include <asm/sun3-head.h>
27 #include <asm/sun3mmu.h>
28 #include <asm/machdep.h>
29 #include <asm/machines.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
37 char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
38
39 static void sun3_sched_init(void);
40 extern void sun3_get_model (char* model);
41 extern int sun3_hwclk(int set, struct rtc_time *t);
42
43 volatile char* clock_va;
44 extern unsigned long availmem;
45 unsigned long num_pages;
46
sun3_get_hardware_list(struct seq_file * m)47 static void sun3_get_hardware_list(struct seq_file *m)
48 {
49 seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
50 }
51
sun3_init(void)52 void __init sun3_init(void)
53 {
54 unsigned char enable_register;
55 int i;
56
57 m68k_machtype= MACH_SUN3;
58 m68k_cputype = CPU_68020;
59 m68k_fputype = FPU_68881; /* mc68881 actually */
60 m68k_mmutype = MMU_SUN3;
61 clock_va = (char *) 0xfe06000; /* dark */
62 sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */
63 sun3_disable_interrupts();
64
65 prom_init((void *)LINUX_OPPROM_BEGVM);
66
67 GET_CONTROL_BYTE(AC_SENABLE,enable_register);
68 enable_register |= 0x50; /* Enable FPU */
69 SET_CONTROL_BYTE(AC_SENABLE,enable_register);
70 GET_CONTROL_BYTE(AC_SENABLE,enable_register);
71
72 /* This code looks suspicious, because it doesn't subtract
73 memory belonging to the kernel from the available space */
74
75
76 memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));
77
78 /* Reserve important PMEGS */
79 /* FIXME: These should be probed instead of hardcoded */
80
81 for (i=0; i<8; i++) /* Kernel PMEGs */
82 sun3_reserved_pmeg[i] = 1;
83
84 sun3_reserved_pmeg[247] = 1; /* ROM mapping */
85 sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */
86 sun3_reserved_pmeg[251] = 1; /* VB area */
87 sun3_reserved_pmeg[254] = 1; /* main I/O */
88
89 sun3_reserved_pmeg[249] = 1;
90 sun3_reserved_pmeg[252] = 1;
91 sun3_reserved_pmeg[253] = 1;
92 set_fs(KERNEL_DS);
93 }
94
95 /* Without this, Bad Things happen when something calls arch_reset. */
sun3_reboot(void)96 static void sun3_reboot (void)
97 {
98 prom_reboot ("vmlinux");
99 }
100
sun3_halt(void)101 static void sun3_halt (void)
102 {
103 prom_halt ();
104 }
105
106 /* sun3 bootmem allocation */
107
sun3_bootmem_alloc(unsigned long memory_start,unsigned long memory_end)108 static void __init sun3_bootmem_alloc(unsigned long memory_start,
109 unsigned long memory_end)
110 {
111 unsigned long start_page;
112
113 /* align start/end to page boundaries */
114 memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);
115 memory_end = memory_end & PAGE_MASK;
116
117 start_page = __pa(memory_start) >> PAGE_SHIFT;
118 max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT;
119
120 high_memory = (void *)memory_end;
121 availmem = memory_start;
122
123 m68k_setup_node(0);
124 }
125
126
config_sun3(void)127 void __init config_sun3(void)
128 {
129 unsigned long memory_start, memory_end;
130
131 pr_info("ARCH: SUN3\n");
132 idprom_init();
133
134 /* Subtract kernel memory from available memory */
135
136 mach_sched_init = sun3_sched_init;
137 mach_init_IRQ = sun3_init_IRQ;
138 mach_reset = sun3_reboot;
139 mach_get_model = sun3_get_model;
140 mach_hwclk = sun3_hwclk;
141 mach_halt = sun3_halt;
142 mach_get_hardware_list = sun3_get_hardware_list;
143
144 memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
145 // PROM seems to want the last couple of physical pages. --m
146 memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
147
148 m68k_num_memory=1;
149 m68k_memory[0].size=*(romvec->pv_sun3mem);
150
151 sun3_bootmem_alloc(memory_start, memory_end);
152 }
153
sun3_sched_init(void)154 static void __init sun3_sched_init(void)
155 {
156 sun3_disable_interrupts();
157 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
158 intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
159 intersil_clear();
160 sun3_enable_irq(5);
161 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
162 sun3_enable_interrupts();
163 intersil_clear();
164 }
165
166 #if IS_ENABLED(CONFIG_SUN3_SCSI)
167
168 static const struct resource sun3_scsi_vme_rsrc[] __initconst = {
169 {
170 .flags = IORESOURCE_IRQ,
171 .start = SUN3_VEC_VMESCSI0,
172 .end = SUN3_VEC_VMESCSI0,
173 }, {
174 .flags = IORESOURCE_MEM,
175 .start = 0xff200000,
176 .end = 0xff200021,
177 }, {
178 .flags = IORESOURCE_IRQ,
179 .start = SUN3_VEC_VMESCSI1,
180 .end = SUN3_VEC_VMESCSI1,
181 }, {
182 .flags = IORESOURCE_MEM,
183 .start = 0xff204000,
184 .end = 0xff204021,
185 },
186 };
187
188 /*
189 * Int: level 2 autovector
190 * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0>
191 */
192 static const struct resource sun3_scsi_rsrc[] __initconst = {
193 {
194 .flags = IORESOURCE_IRQ,
195 .start = 2,
196 .end = 2,
197 }, {
198 .flags = IORESOURCE_MEM,
199 .start = 0x00140000,
200 .end = 0x0014001f,
201 },
202 };
203
sun3_platform_init(void)204 int __init sun3_platform_init(void)
205 {
206 switch (idprom->id_machtype) {
207 case SM_SUN3 | SM_3_160:
208 case SM_SUN3 | SM_3_260:
209 platform_device_register_simple("sun3_scsi_vme", -1,
210 sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc));
211 break;
212 case SM_SUN3 | SM_3_50:
213 case SM_SUN3 | SM_3_60:
214 platform_device_register_simple("sun3_scsi", -1,
215 sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc));
216 break;
217 }
218 return 0;
219 }
220
221 arch_initcall(sun3_platform_init);
222
223 #endif
224