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