2 * linux/arch/m68k/sun3/config.c
4 * Copyright (C) 1996,1997 Pekka Pietik{inen
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
13 #include <linux/config.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
18 #include <linux/tty.h>
19 #include <linux/console.h>
20 #include <linux/init.h>
21 #include <linux/bootmem.h>
23 #include <asm/oplib.h>
24 #include <asm/setup.h>
25 #include <asm/contregs.h>
27 #include <asm/pgtable.h>
28 #include <asm/sun3-head.h>
29 #include <asm/sun3mmu.h>
30 #include <asm/machdep.h>
31 #include <asm/intersil.h>
33 #include <asm/segment.h>
35 extern char _text
, _end
;
37 char sun3_reserved_pmeg
[SUN3_PMEGS_NUM
];
39 extern unsigned long sun3_gettimeoffset(void);
40 extern int sun3_get_irq_list (char *);
41 extern void sun3_sched_init(void (*handler
)(int, void *, struct pt_regs
*));
42 extern void sun3_init_IRQ (void);
43 extern void (*sun3_default_handler
[]) (int, void *, struct pt_regs
*);
44 extern int sun3_request_irq (unsigned int irq
, void (*handler
)(int, void *, struct pt_regs
*),
45 unsigned long flags
, const char *devname
, void *dev_id
);
46 extern void sun3_free_irq (unsigned int irq
, void *dev_id
);
47 extern void sun3_enable_irq (unsigned int);
48 extern void sun3_disable_irq (unsigned int);
49 extern void sun3_enable_interrupts (void);
50 extern void sun3_disable_interrupts (void);
51 extern void sun3_get_model (char* model
);
52 extern void idprom_init (void);
53 extern void sun3_gettod (int *yearp
, int *monp
, int *dayp
,
54 int *hourp
, int *minp
, int *secp
);
55 extern int sun3_hwclk(int set
, struct hwclk_time
*t
);
57 extern void sun_serial_setup(void);
58 volatile char* clock_va
;
59 extern unsigned char* sun3_intreg
;
60 extern unsigned long availmem
;
61 unsigned long num_pages
;
63 void __init
sun3_init(void)
65 unsigned char enable_register
;
68 m68k_machtype
= MACH_SUN3
;
69 m68k_cputype
= CPU_68020
;
70 m68k_fputype
= FPU_68881
; /* mc68881 actually */
71 m68k_mmutype
= MMU_SUN3
;
72 clock_va
= (char *) 0xfe06000; /* dark */
73 sun3_intreg
= (unsigned char *) 0xfe0a000; /* magic */
74 sun3_disable_interrupts();
76 prom_init((void *)LINUX_OPPROM_BEGVM
);
78 GET_CONTROL_BYTE(AC_SENABLE
,enable_register
);
79 enable_register
|= 0x40; /* Enable FPU */
80 SET_CONTROL_BYTE(AC_SENABLE
,enable_register
);
81 GET_CONTROL_BYTE(AC_SENABLE
,enable_register
);
83 /* This code looks suspicious, because it doesn't subtract
84 memory belonging to the kernel from the available space */
87 memset(sun3_reserved_pmeg
, 0, sizeof(sun3_reserved_pmeg
));
89 /* Reserve important PMEGS */
90 /* FIXME: These should be probed instead of hardcoded */
92 for (i
=0; i
<8; i
++) /* Kernel PMEGs */
93 sun3_reserved_pmeg
[i
] = 1;
95 sun3_reserved_pmeg
[247] = 1; /* ROM mapping */
96 sun3_reserved_pmeg
[248] = 1; /* AMD Ethernet */
97 sun3_reserved_pmeg
[251] = 1; /* VB area */
98 sun3_reserved_pmeg
[254] = 1; /* main I/O */
100 sun3_reserved_pmeg
[249] = 1;
101 sun3_reserved_pmeg
[252] = 1;
102 sun3_reserved_pmeg
[253] = 1;
106 /* Without this, Bad Things happen when something calls arch_reset. */
107 static void sun3_reboot (void)
109 prom_reboot ("vmlinux");
112 static void sun3_halt (void)
117 /* sun3 bootmem allocation */
119 void __init
sun3_bootmem_alloc(unsigned long memory_start
, unsigned long memory_end
)
121 unsigned long start_page
;
123 /* align start/end to page boundries */
124 memory_start
= ((memory_start
+ (PAGE_SIZE
-1)) & PAGE_MASK
);
125 memory_end
= memory_end
& PAGE_MASK
;
127 start_page
= __pa(memory_start
) >> PAGE_SHIFT
;
128 num_pages
= __pa(memory_end
) >> PAGE_SHIFT
;
130 high_memory
= (void *)memory_end
;
131 availmem
= memory_start
;
133 availmem
+= init_bootmem(start_page
, num_pages
);
134 availmem
= (availmem
+ (PAGE_SIZE
-1)) & PAGE_MASK
;
136 free_bootmem(__pa(availmem
), memory_end
- (availmem
));
140 void __init
config_sun3(void)
142 unsigned long memory_start
, memory_end
;
144 printk("ARCH: SUN3\n");
147 /* Subtract kernel memory from available memory */
149 mach_sched_init
= sun3_sched_init
;
150 mach_init_IRQ
= sun3_init_IRQ
;
151 mach_default_handler
= &sun3_default_handler
;
152 mach_request_irq
= sun3_request_irq
;
153 mach_free_irq
= sun3_free_irq
;
154 // mach_keyb_init = sun3_keyb_init;
155 enable_irq
= sun3_enable_irq
;
156 disable_irq
= sun3_disable_irq
;
157 mach_get_irq_list
= sun3_get_irq_list
;
158 mach_gettod
= sun3_gettod
;
159 mach_reset
= sun3_reboot
;
160 mach_gettimeoffset
= sun3_gettimeoffset
;
161 mach_get_model
= sun3_get_model
;
162 mach_hwclk
= sun3_hwclk
;
163 mach_halt
= sun3_halt
;
164 #ifndef CONFIG_SERIAL_CONSOLE
165 conswitchp
= &dummy_con
;
168 memory_start
= ((((int)&_end
) + 0x2000) & ~0x1fff);
169 // PROM seems to want the last couple of physical pages. --m
170 memory_end
= *(romvec
->pv_sun3mem
) + PAGE_OFFSET
- 2*PAGE_SIZE
;
173 m68k_memory
[0].size
=*(romvec
->pv_sun3mem
);
175 sun3_bootmem_alloc(memory_start
, memory_end
);
182 void __init
sun3_sched_init(void (*timer_routine
)(int, void *, struct pt_regs
*))
184 sun3_disable_interrupts();
185 intersil_clock
->cmd_reg
=(INTERSIL_RUN
|INTERSIL_INT_DISABLE
|INTERSIL_24H_MODE
);
186 intersil_clock
->int_reg
=INTERSIL_HZ_100_MASK
;
189 intersil_clock
->cmd_reg
=(INTERSIL_RUN
|INTERSIL_INT_ENABLE
|INTERSIL_24H_MODE
);
190 sun3_enable_interrupts();