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#include <linux/platform_device.h>
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>
26#include <asm/pgalloc.h>
27#include <asm/sun3-head.h>
28#include <asm/sun3mmu.h>
29#include <asm/rtc.h>
30#include <asm/machdep.h>
31#include <asm/machines.h>
32#include <asm/idprom.h>
33#include <asm/intersil.h>
34#include <asm/irq.h>
35#include <asm/sections.h>
36#include <asm/segment.h>
37#include <asm/sun3ints.h>
38
39char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
40
41extern u32 sun3_gettimeoffset(void);
42static void sun3_sched_init(irq_handler_t handler);
43extern void sun3_get_model (char* model);
44extern int sun3_hwclk(int set, struct rtc_time *t);
45
46volatile char* clock_va;
47extern unsigned long availmem;
48unsigned long num_pages;
49
50static void sun3_get_hardware_list(struct seq_file *m)
51{
52	seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
53}
54
55void __init sun3_init(void)
56{
57	unsigned char enable_register;
58	int i;
59
60	m68k_machtype= MACH_SUN3;
61	m68k_cputype = CPU_68020;
62	m68k_fputype = FPU_68881; /* mc68881 actually */
63	m68k_mmutype = MMU_SUN3;
64	clock_va    =          (char *) 0xfe06000;	/* dark  */
65	sun3_intreg = (unsigned char *) 0xfe0a000;	/* magic */
66	sun3_disable_interrupts();
67
68	prom_init((void *)LINUX_OPPROM_BEGVM);
69
70	GET_CONTROL_BYTE(AC_SENABLE,enable_register);
71	enable_register |= 0x50; /* Enable FPU */
72	SET_CONTROL_BYTE(AC_SENABLE,enable_register);
73	GET_CONTROL_BYTE(AC_SENABLE,enable_register);
74
75	/* This code looks suspicious, because it doesn't subtract
76           memory belonging to the kernel from the available space */
77
78
79	memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));
80
81	/* Reserve important PMEGS */
82	/* FIXME: These should be probed instead of hardcoded */
83
84	for (i=0; i<8; i++)		/* Kernel PMEGs */
85		sun3_reserved_pmeg[i] = 1;
86
87	sun3_reserved_pmeg[247] = 1;	/* ROM mapping  */
88	sun3_reserved_pmeg[248] = 1;	/* AMD Ethernet */
89	sun3_reserved_pmeg[251] = 1;	/* VB area      */
90	sun3_reserved_pmeg[254] = 1;	/* main I/O     */
91
92	sun3_reserved_pmeg[249] = 1;
93	sun3_reserved_pmeg[252] = 1;
94	sun3_reserved_pmeg[253] = 1;
95	set_fs(KERNEL_DS);
96}
97
98/* Without this, Bad Things happen when something calls arch_reset. */
99static void sun3_reboot (void)
100{
101	prom_reboot ("vmlinux");
102}
103
104static void sun3_halt (void)
105{
106	prom_halt ();
107}
108
109/* sun3 bootmem allocation */
110
111static void __init sun3_bootmem_alloc(unsigned long memory_start,
112				      unsigned long memory_end)
113{
114	unsigned long start_page;
115
116	/* align start/end to page boundaries */
117	memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);
118	memory_end = memory_end & PAGE_MASK;
119
120	start_page = __pa(memory_start) >> PAGE_SHIFT;
121	num_pages = __pa(memory_end) >> PAGE_SHIFT;
122
123	high_memory = (void *)memory_end;
124	availmem = memory_start;
125
126	m68k_setup_node(0);
127	availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages);
128	availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK;
129
130	free_bootmem(__pa(availmem), memory_end - (availmem));
131}
132
133
134void __init config_sun3(void)
135{
136	unsigned long memory_start, memory_end;
137
138	printk("ARCH: SUN3\n");
139	idprom_init();
140
141	/* Subtract kernel memory from available memory */
142
143        mach_sched_init      =  sun3_sched_init;
144        mach_init_IRQ        =  sun3_init_IRQ;
145        mach_reset           =  sun3_reboot;
146	arch_gettimeoffset   =  sun3_gettimeoffset;
147	mach_get_model	     =  sun3_get_model;
148	mach_hwclk           =  sun3_hwclk;
149	mach_halt	     =  sun3_halt;
150	mach_get_hardware_list = sun3_get_hardware_list;
151
152	memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
153// PROM seems to want the last couple of physical pages. --m
154	memory_end   = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
155
156	m68k_num_memory=1;
157        m68k_memory[0].size=*(romvec->pv_sun3mem);
158
159	sun3_bootmem_alloc(memory_start, memory_end);
160}
161
162static void __init sun3_sched_init(irq_handler_t timer_routine)
163{
164	sun3_disable_interrupts();
165        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
166        intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
167	intersil_clear();
168        sun3_enable_irq(5);
169        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
170        sun3_enable_interrupts();
171        intersil_clear();
172}
173
174#ifdef CONFIG_SUN3_SCSI
175
176static const struct resource sun3_scsi_vme_rsrc[] __initconst = {
177	{
178		.flags = IORESOURCE_IRQ,
179		.start = SUN3_VEC_VMESCSI0,
180		.end   = SUN3_VEC_VMESCSI0,
181	}, {
182		.flags = IORESOURCE_MEM,
183		.start = 0xff200000,
184		.end   = 0xff200021,
185	}, {
186		.flags = IORESOURCE_IRQ,
187		.start = SUN3_VEC_VMESCSI1,
188		.end   = SUN3_VEC_VMESCSI1,
189	}, {
190		.flags = IORESOURCE_MEM,
191		.start = 0xff204000,
192		.end   = 0xff204021,
193	},
194};
195
196/*
197 * Int: level 2 autovector
198 * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0>
199 */
200static const struct resource sun3_scsi_rsrc[] __initconst = {
201	{
202		.flags = IORESOURCE_IRQ,
203		.start = 2,
204		.end   = 2,
205	}, {
206		.flags = IORESOURCE_MEM,
207		.start = 0x00140000,
208		.end   = 0x0014001f,
209	},
210};
211
212int __init sun3_platform_init(void)
213{
214	switch (idprom->id_machtype) {
215	case SM_SUN3 | SM_3_160:
216	case SM_SUN3 | SM_3_260:
217		platform_device_register_simple("sun3_scsi_vme", -1,
218			sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc));
219		break;
220	case SM_SUN3 | SM_3_50:
221	case SM_SUN3 | SM_3_60:
222		platform_device_register_simple("sun3_scsi", -1,
223			sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc));
224		break;
225	}
226	return 0;
227}
228
229arch_initcall(sun3_platform_init);
230
231#endif
232