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1da177e4 LT |
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 | ||
1da177e4 LT |
11 | #include <linux/types.h> |
12 | #include <linux/kernel.h> | |
13 | #include <linux/mm.h> | |
813dcf7a | 14 | #include <linux/seq_file.h> |
1da177e4 LT |
15 | #include <linux/tty.h> |
16 | #include <linux/console.h> | |
17 | #include <linux/init.h> | |
57c8a661 | 18 | #include <linux/memblock.h> |
0d31f875 | 19 | #include <linux/platform_device.h> |
1da177e4 LT |
20 | |
21 | #include <asm/oplib.h> | |
22 | #include <asm/setup.h> | |
23 | #include <asm/contregs.h> | |
24 | #include <asm/movs.h> | |
25 | #include <asm/pgtable.h> | |
12d810c1 | 26 | #include <asm/pgalloc.h> |
1da177e4 LT |
27 | #include <asm/sun3-head.h> |
28 | #include <asm/sun3mmu.h> | |
1da177e4 | 29 | #include <asm/machdep.h> |
0d31f875 | 30 | #include <asm/machines.h> |
c85627fb | 31 | #include <asm/idprom.h> |
1da177e4 LT |
32 | #include <asm/intersil.h> |
33 | #include <asm/irq.h> | |
c85627fb | 34 | #include <asm/sections.h> |
1da177e4 LT |
35 | #include <asm/segment.h> |
36 | #include <asm/sun3ints.h> | |
37 | ||
1da177e4 LT |
38 | char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; |
39 | ||
c8d5ba18 | 40 | extern u32 sun3_gettimeoffset(void); |
07b81259 | 41 | static void sun3_sched_init(irq_handler_t handler); |
1da177e4 | 42 | extern void sun3_get_model (char* model); |
1da177e4 LT |
43 | extern int sun3_hwclk(int set, struct rtc_time *t); |
44 | ||
45 | volatile char* clock_va; | |
1da177e4 LT |
46 | extern unsigned long availmem; |
47 | unsigned long num_pages; | |
48 | ||
813dcf7a | 49 | static void sun3_get_hardware_list(struct seq_file *m) |
1da177e4 | 50 | { |
813dcf7a | 51 | seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid); |
1da177e4 LT |
52 | } |
53 | ||
54 | void __init sun3_init(void) | |
55 | { | |
56 | unsigned char enable_register; | |
57 | int i; | |
58 | ||
59 | m68k_machtype= MACH_SUN3; | |
60 | m68k_cputype = CPU_68020; | |
61 | m68k_fputype = FPU_68881; /* mc68881 actually */ | |
62 | m68k_mmutype = MMU_SUN3; | |
63 | clock_va = (char *) 0xfe06000; /* dark */ | |
64 | sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */ | |
65 | sun3_disable_interrupts(); | |
66 | ||
67 | prom_init((void *)LINUX_OPPROM_BEGVM); | |
68 | ||
69 | GET_CONTROL_BYTE(AC_SENABLE,enable_register); | |
70 | enable_register |= 0x50; /* Enable FPU */ | |
71 | SET_CONTROL_BYTE(AC_SENABLE,enable_register); | |
72 | GET_CONTROL_BYTE(AC_SENABLE,enable_register); | |
73 | ||
74 | /* This code looks suspicious, because it doesn't subtract | |
75 | memory belonging to the kernel from the available space */ | |
76 | ||
77 | ||
78 | memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg)); | |
79 | ||
80 | /* Reserve important PMEGS */ | |
81 | /* FIXME: These should be probed instead of hardcoded */ | |
82 | ||
83 | for (i=0; i<8; i++) /* Kernel PMEGs */ | |
84 | sun3_reserved_pmeg[i] = 1; | |
85 | ||
86 | sun3_reserved_pmeg[247] = 1; /* ROM mapping */ | |
87 | sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */ | |
88 | sun3_reserved_pmeg[251] = 1; /* VB area */ | |
89 | sun3_reserved_pmeg[254] = 1; /* main I/O */ | |
90 | ||
91 | sun3_reserved_pmeg[249] = 1; | |
92 | sun3_reserved_pmeg[252] = 1; | |
93 | sun3_reserved_pmeg[253] = 1; | |
94 | set_fs(KERNEL_DS); | |
95 | } | |
96 | ||
97 | /* Without this, Bad Things happen when something calls arch_reset. */ | |
98 | static void sun3_reboot (void) | |
99 | { | |
100 | prom_reboot ("vmlinux"); | |
101 | } | |
102 | ||
103 | static void sun3_halt (void) | |
104 | { | |
105 | prom_halt (); | |
106 | } | |
107 | ||
108 | /* sun3 bootmem allocation */ | |
109 | ||
07b81259 AB |
110 | static void __init sun3_bootmem_alloc(unsigned long memory_start, |
111 | unsigned long memory_end) | |
1da177e4 LT |
112 | { |
113 | unsigned long start_page; | |
114 | ||
115 | /* align start/end to page boundaries */ | |
116 | memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK); | |
117 | memory_end = memory_end & PAGE_MASK; | |
118 | ||
119 | start_page = __pa(memory_start) >> PAGE_SHIFT; | |
c73ec319 | 120 | max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT; |
1da177e4 LT |
121 | |
122 | high_memory = (void *)memory_end; | |
123 | availmem = memory_start; | |
124 | ||
12d810c1 | 125 | m68k_setup_node(0); |
1da177e4 LT |
126 | } |
127 | ||
128 | ||
129 | void __init config_sun3(void) | |
130 | { | |
131 | unsigned long memory_start, memory_end; | |
132 | ||
56bbd862 | 133 | pr_info("ARCH: SUN3\n"); |
1da177e4 LT |
134 | idprom_init(); |
135 | ||
136 | /* Subtract kernel memory from available memory */ | |
137 | ||
138 | mach_sched_init = sun3_sched_init; | |
139 | mach_init_IRQ = sun3_init_IRQ; | |
1da177e4 | 140 | mach_reset = sun3_reboot; |
c8d5ba18 | 141 | arch_gettimeoffset = sun3_gettimeoffset; |
1da177e4 LT |
142 | mach_get_model = sun3_get_model; |
143 | mach_hwclk = sun3_hwclk; | |
144 | mach_halt = sun3_halt; | |
145 | mach_get_hardware_list = sun3_get_hardware_list; | |
1da177e4 | 146 | |
c85627fb | 147 | memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff); |
1da177e4 LT |
148 | // PROM seems to want the last couple of physical pages. --m |
149 | memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; | |
150 | ||
151 | m68k_num_memory=1; | |
152 | m68k_memory[0].size=*(romvec->pv_sun3mem); | |
153 | ||
154 | sun3_bootmem_alloc(memory_start, memory_end); | |
155 | } | |
156 | ||
07b81259 | 157 | static void __init sun3_sched_init(irq_handler_t timer_routine) |
1da177e4 LT |
158 | { |
159 | sun3_disable_interrupts(); | |
160 | intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); | |
161 | intersil_clock->int_reg=INTERSIL_HZ_100_MASK; | |
162 | intersil_clear(); | |
163 | sun3_enable_irq(5); | |
164 | intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); | |
165 | sun3_enable_interrupts(); | |
166 | intersil_clear(); | |
167 | } | |
168 | ||
2d522618 | 169 | #if IS_ENABLED(CONFIG_SUN3_SCSI) |
0d31f875 FT |
170 | |
171 | static const struct resource sun3_scsi_vme_rsrc[] __initconst = { | |
172 | { | |
173 | .flags = IORESOURCE_IRQ, | |
174 | .start = SUN3_VEC_VMESCSI0, | |
175 | .end = SUN3_VEC_VMESCSI0, | |
176 | }, { | |
177 | .flags = IORESOURCE_MEM, | |
178 | .start = 0xff200000, | |
179 | .end = 0xff200021, | |
180 | }, { | |
181 | .flags = IORESOURCE_IRQ, | |
182 | .start = SUN3_VEC_VMESCSI1, | |
183 | .end = SUN3_VEC_VMESCSI1, | |
184 | }, { | |
185 | .flags = IORESOURCE_MEM, | |
186 | .start = 0xff204000, | |
187 | .end = 0xff204021, | |
188 | }, | |
189 | }; | |
190 | ||
191 | /* | |
192 | * Int: level 2 autovector | |
193 | * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0> | |
194 | */ | |
195 | static const struct resource sun3_scsi_rsrc[] __initconst = { | |
196 | { | |
197 | .flags = IORESOURCE_IRQ, | |
198 | .start = 2, | |
199 | .end = 2, | |
200 | }, { | |
201 | .flags = IORESOURCE_MEM, | |
202 | .start = 0x00140000, | |
203 | .end = 0x0014001f, | |
204 | }, | |
205 | }; | |
206 | ||
207 | int __init sun3_platform_init(void) | |
208 | { | |
209 | switch (idprom->id_machtype) { | |
210 | case SM_SUN3 | SM_3_160: | |
211 | case SM_SUN3 | SM_3_260: | |
212 | platform_device_register_simple("sun3_scsi_vme", -1, | |
213 | sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc)); | |
214 | break; | |
215 | case SM_SUN3 | SM_3_50: | |
216 | case SM_SUN3 | SM_3_60: | |
217 | platform_device_register_simple("sun3_scsi", -1, | |
218 | sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc)); | |
219 | break; | |
220 | } | |
221 | return 0; | |
222 | } | |
223 | ||
224 | arch_initcall(sun3_platform_init); | |
225 | ||
226 | #endif |