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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> | |
18 | #include <linux/bootmem.h> | |
19 | ||
20 | #include <asm/oplib.h> | |
21 | #include <asm/setup.h> | |
22 | #include <asm/contregs.h> | |
23 | #include <asm/movs.h> | |
24 | #include <asm/pgtable.h> | |
12d810c1 | 25 | #include <asm/pgalloc.h> |
1da177e4 LT |
26 | #include <asm/sun3-head.h> |
27 | #include <asm/sun3mmu.h> | |
28 | #include <asm/rtc.h> | |
29 | #include <asm/machdep.h> | |
c85627fb | 30 | #include <asm/idprom.h> |
1da177e4 LT |
31 | #include <asm/intersil.h> |
32 | #include <asm/irq.h> | |
c85627fb | 33 | #include <asm/sections.h> |
1da177e4 LT |
34 | #include <asm/segment.h> |
35 | #include <asm/sun3ints.h> | |
36 | ||
1da177e4 LT |
37 | char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; |
38 | ||
39 | extern unsigned long sun3_gettimeoffset(void); | |
07b81259 | 40 | static void sun3_sched_init(irq_handler_t handler); |
1da177e4 | 41 | extern void sun3_get_model (char* model); |
1da177e4 LT |
42 | extern int sun3_hwclk(int set, struct rtc_time *t); |
43 | ||
44 | volatile char* clock_va; | |
1da177e4 LT |
45 | extern unsigned long availmem; |
46 | unsigned long num_pages; | |
47 | ||
813dcf7a | 48 | static void sun3_get_hardware_list(struct seq_file *m) |
1da177e4 | 49 | { |
813dcf7a | 50 | seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid); |
1da177e4 LT |
51 | } |
52 | ||
53 | 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_fs(KERNEL_DS); | |
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 | ||
07b81259 AB |
109 | static void __init sun3_bootmem_alloc(unsigned long memory_start, |
110 | unsigned long memory_end) | |
1da177e4 LT |
111 | { |
112 | unsigned long start_page; | |
113 | ||
114 | /* align start/end to page boundaries */ | |
115 | memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK); | |
116 | memory_end = memory_end & PAGE_MASK; | |
117 | ||
118 | start_page = __pa(memory_start) >> PAGE_SHIFT; | |
119 | num_pages = __pa(memory_end) >> PAGE_SHIFT; | |
120 | ||
121 | high_memory = (void *)memory_end; | |
122 | availmem = memory_start; | |
123 | ||
12d810c1 | 124 | m68k_setup_node(0); |
1da177e4 LT |
125 | availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages); |
126 | availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; | |
127 | ||
128 | free_bootmem(__pa(availmem), memory_end - (availmem)); | |
129 | } | |
130 | ||
131 | ||
132 | void __init config_sun3(void) | |
133 | { | |
134 | unsigned long memory_start, memory_end; | |
135 | ||
136 | printk("ARCH: SUN3\n"); | |
137 | idprom_init(); | |
138 | ||
139 | /* Subtract kernel memory from available memory */ | |
140 | ||
141 | mach_sched_init = sun3_sched_init; | |
142 | mach_init_IRQ = sun3_init_IRQ; | |
1da177e4 LT |
143 | mach_reset = sun3_reboot; |
144 | mach_gettimeoffset = sun3_gettimeoffset; | |
145 | mach_get_model = sun3_get_model; | |
146 | mach_hwclk = sun3_hwclk; | |
147 | mach_halt = sun3_halt; | |
148 | mach_get_hardware_list = sun3_get_hardware_list; | |
1da177e4 | 149 | |
c85627fb | 150 | memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff); |
1da177e4 LT |
151 | // PROM seems to want the last couple of physical pages. --m |
152 | memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; | |
153 | ||
154 | m68k_num_memory=1; | |
155 | m68k_memory[0].size=*(romvec->pv_sun3mem); | |
156 | ||
157 | sun3_bootmem_alloc(memory_start, memory_end); | |
158 | } | |
159 | ||
07b81259 | 160 | static void __init sun3_sched_init(irq_handler_t timer_routine) |
1da177e4 LT |
161 | { |
162 | sun3_disable_interrupts(); | |
163 | intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); | |
164 | intersil_clock->int_reg=INTERSIL_HZ_100_MASK; | |
165 | intersil_clear(); | |
166 | sun3_enable_irq(5); | |
167 | intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); | |
168 | sun3_enable_interrupts(); | |
169 | intersil_clear(); | |
170 | } | |
171 |