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, fmt: "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 | |