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/sun3ints.h>
35
36 char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
37
38 static void sun3_sched_init(void);
39 extern void sun3_get_model (char* model);
40 extern int sun3_hwclk(int set, struct rtc_time *t);
41
42 volatile char* clock_va;
43 extern unsigned long availmem;
44 unsigned long num_pages;
45
sun3_get_hardware_list(struct seq_file * m)46 static void sun3_get_hardware_list(struct seq_file *m)
47 {
48 seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
49 }
50
sun3_init(void)51 void __init sun3_init(void)
52 {
53 unsigned char enable_register;
54 int i;
55
56 m68k_machtype= MACH_SUN3;
57 m68k_cputype = CPU_68020;
58 m68k_fputype = FPU_68881; /* mc68881 actually */
59 m68k_mmutype = MMU_SUN3;
60 clock_va = (char *) 0xfe06000; /* dark */
61 sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */
62 sun3_disable_interrupts();
63
64 prom_init((void *)LINUX_OPPROM_BEGVM);
65
66 GET_CONTROL_BYTE(AC_SENABLE,enable_register);
67 enable_register |= 0x50; /* Enable FPU */
68 SET_CONTROL_BYTE(AC_SENABLE,enable_register);
69 GET_CONTROL_BYTE(AC_SENABLE,enable_register);
70
71 /* This code looks suspicious, because it doesn't subtract
72 memory belonging to the kernel from the available space */
73
74
75 memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));
76
77 /* Reserve important PMEGS */
78 /* FIXME: These should be probed instead of hardcoded */
79
80 for (i=0; i<8; i++) /* Kernel PMEGs */
81 sun3_reserved_pmeg[i] = 1;
82
83 sun3_reserved_pmeg[247] = 1; /* ROM mapping */
84 sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */
85 sun3_reserved_pmeg[251] = 1; /* VB area */
86 sun3_reserved_pmeg[254] = 1; /* main I/O */
87
88 sun3_reserved_pmeg[249] = 1;
89 sun3_reserved_pmeg[252] = 1;
90 sun3_reserved_pmeg[253] = 1;
91 set_fc(USER_DATA);
92 }
93
94 /* Without this, Bad Things happen when something calls arch_reset. */
sun3_reboot(void)95 static void sun3_reboot (void)
96 {
97 prom_reboot ("vmlinux");
98 }
99
sun3_halt(void)100 static void sun3_halt (void)
101 {
102 prom_halt ();
103 }
104
105 /* sun3 bootmem allocation */
106
sun3_bootmem_alloc(unsigned long memory_start,unsigned long memory_end)107 static void __init sun3_bootmem_alloc(unsigned long memory_start,
108 unsigned long memory_end)
109 {
110 unsigned long start_page;
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 start_page = __pa(memory_start) >> PAGE_SHIFT;
117 max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT;
118
119 high_memory = (void *)memory_end;
120 availmem = memory_start;
121
122 m68k_setup_node(0);
123 }
124
125
config_sun3(void)126 void __init config_sun3(void)
127 {
128 unsigned long memory_start, memory_end;
129
130 pr_info("ARCH: SUN3\n");
131 idprom_init();
132
133 /* Subtract kernel memory from available memory */
134
135 mach_sched_init = sun3_sched_init;
136 mach_init_IRQ = sun3_init_IRQ;
137 mach_reset = sun3_reboot;
138 mach_get_model = sun3_get_model;
139 mach_hwclk = sun3_hwclk;
140 mach_halt = sun3_halt;
141 mach_get_hardware_list = sun3_get_hardware_list;
142
143 memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
144 // PROM seems to want the last couple of physical pages. --m
145 memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
146
147 m68k_num_memory=1;
148 m68k_memory[0].size=*(romvec->pv_sun3mem);
149
150 sun3_bootmem_alloc(memory_start, memory_end);
151 }
152
sun3_sched_init(void)153 static void __init sun3_sched_init(void)
154 {
155 sun3_disable_interrupts();
156 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
157 intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
158 intersil_clear();
159 sun3_enable_irq(5);
160 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
161 sun3_enable_interrupts();
162 intersil_clear();
163 }
164
165 #if IS_ENABLED(CONFIG_SUN3_SCSI)
166
167 static const struct resource sun3_scsi_vme_rsrc[] __initconst = {
168 {
169 .flags = IORESOURCE_IRQ,
170 .start = SUN3_VEC_VMESCSI0,
171 .end = SUN3_VEC_VMESCSI0,
172 }, {
173 .flags = IORESOURCE_MEM,
174 .start = 0xff200000,
175 .end = 0xff200021,
176 }, {
177 .flags = IORESOURCE_IRQ,
178 .start = SUN3_VEC_VMESCSI1,
179 .end = SUN3_VEC_VMESCSI1,
180 }, {
181 .flags = IORESOURCE_MEM,
182 .start = 0xff204000,
183 .end = 0xff204021,
184 },
185 };
186
187 /*
188 * Int: level 2 autovector
189 * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0>
190 */
191 static const struct resource sun3_scsi_rsrc[] __initconst = {
192 {
193 .flags = IORESOURCE_IRQ,
194 .start = 2,
195 .end = 2,
196 }, {
197 .flags = IORESOURCE_MEM,
198 .start = 0x00140000,
199 .end = 0x0014001f,
200 },
201 };
202
sun3_platform_init(void)203 int __init sun3_platform_init(void)
204 {
205 switch (idprom->id_machtype) {
206 case SM_SUN3 | SM_3_160:
207 case SM_SUN3 | SM_3_260:
208 platform_device_register_simple("sun3_scsi_vme", -1,
209 sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc));
210 break;
211 case SM_SUN3 | SM_3_50:
212 case SM_SUN3 | SM_3_60:
213 platform_device_register_simple("sun3_scsi", -1,
214 sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc));
215 break;
216 }
217 return 0;
218 }
219
220 arch_initcall(sun3_platform_init);
221
222 #endif
223