Merge branch 'for_2.6.40/gpio-move' of git://git.kernel.org/pub/scm/linux/kernel...
[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / m68k / sun3 / config.c
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/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>
25 #include <asm/pgalloc.h>
26 #include <asm/sun3-head.h>
27 #include <asm/sun3mmu.h>
28 #include <asm/rtc.h>
29 #include <asm/machdep.h>
30 #include <asm/idprom.h>
31 #include <asm/intersil.h>
32 #include <asm/irq.h>
33 #include <asm/sections.h>
34 #include <asm/segment.h>
35 #include <asm/sun3ints.h>
36
37 char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
38
39 extern unsigned long sun3_gettimeoffset(void);
40 static void sun3_sched_init(irq_handler_t handler);
41 extern void sun3_get_model (char* model);
42 extern int sun3_hwclk(int set, struct rtc_time *t);
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, "PROM Revision:\t%s\n", romvec->pv_monid);
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
109 static void __init sun3_bootmem_alloc(unsigned long memory_start,
110                                       unsigned long memory_end)
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
124         m68k_setup_node(0);
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;
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;
149
150         memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
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
160 static void __init sun3_sched_init(irq_handler_t timer_routine)
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