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 #include <linux/linkage.h> 21 22 #include <asm/oplib.h> 23 #include <asm/setup.h> 24 #include <asm/contregs.h> 25 #include <asm/movs.h> 26 #include <asm/pgalloc.h> 27 #include <asm/sun3-head.h> 28 #include <asm/sun3mmu.h> 29 #include <asm/machdep.h> 30 #include <asm/machines.h> 31 #include <asm/idprom.h> 32 #include <asm/intersil.h> 33 #include <asm/irq.h> 34 #include <asm/sections.h> 35 #include <asm/sun3ints.h> 36 #include <asm/config.h> 37 38 #include "sun3.h" 39 40 char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; 41 42 static void sun3_sched_init(void); 43 44 volatile char* clock_va; 45 extern unsigned long availmem; 46 unsigned long num_pages; 47 sun3_get_hardware_list(struct seq_file * m)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 sun3_init(void)53 asmlinkage 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_fc(USER_DATA); 94 } 95 96 /* Without this, Bad Things happen when something calls arch_reset. */ sun3_reboot(void)97 static void sun3_reboot (void) 98 { 99 prom_reboot ("vmlinux"); 100 } 101 sun3_halt(void)102 static void sun3_halt (void) 103 { 104 prom_halt (); 105 } 106 107 /* sun3 bootmem allocation */ 108 sun3_bootmem_alloc(unsigned long memory_start,unsigned long memory_end)109 static void __init sun3_bootmem_alloc(unsigned long memory_start, 110 unsigned long memory_end) 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 max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT; 117 118 high_memory = (void *)memory_end; 119 availmem = memory_start; 120 121 m68k_setup_node(0); 122 } 123 124 config_sun3(void)125 void __init config_sun3(void) 126 { 127 unsigned long memory_start, memory_end; 128 129 pr_info("ARCH: SUN3\n"); 130 idprom_init(); 131 132 /* Subtract kernel memory from available memory */ 133 134 mach_sched_init = sun3_sched_init; 135 mach_init_IRQ = sun3_init_IRQ; 136 mach_reset = sun3_reboot; 137 mach_get_model = sun3_get_model; 138 mach_hwclk = sun3_hwclk; 139 mach_halt = sun3_halt; 140 mach_get_hardware_list = sun3_get_hardware_list; 141 142 memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff); 143 // PROM seems to want the last couple of physical pages. --m 144 memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; 145 146 m68k_num_memory=1; 147 m68k_memory[0].size=*(romvec->pv_sun3mem); 148 149 sun3_bootmem_alloc(memory_start, memory_end); 150 } 151 sun3_sched_init(void)152 static void __init sun3_sched_init(void) 153 { 154 sun3_disable_interrupts(); 155 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); 156 intersil_clock->int_reg=INTERSIL_HZ_100_MASK; 157 intersil_clear(); 158 sun3_enable_irq(5); 159 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); 160 sun3_enable_interrupts(); 161 intersil_clear(); 162 } 163 164 #if IS_ENABLED(CONFIG_SUN3_SCSI) 165 166 static const struct resource sun3_scsi_vme_rsrc[] __initconst = { 167 { 168 .flags = IORESOURCE_IRQ, 169 .start = SUN3_VEC_VMESCSI0, 170 .end = SUN3_VEC_VMESCSI0, 171 }, { 172 .flags = IORESOURCE_MEM, 173 .start = 0xff200000, 174 .end = 0xff200021, 175 }, { 176 .flags = IORESOURCE_IRQ, 177 .start = SUN3_VEC_VMESCSI1, 178 .end = SUN3_VEC_VMESCSI1, 179 }, { 180 .flags = IORESOURCE_MEM, 181 .start = 0xff204000, 182 .end = 0xff204021, 183 }, 184 }; 185 186 /* 187 * Int: level 2 autovector 188 * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0> 189 */ 190 static const struct resource sun3_scsi_rsrc[] __initconst = { 191 { 192 .flags = IORESOURCE_IRQ, 193 .start = 2, 194 .end = 2, 195 }, { 196 .flags = IORESOURCE_MEM, 197 .start = 0x00140000, 198 .end = 0x0014001f, 199 }, 200 }; 201 sun3_platform_init(void)202 static int __init sun3_platform_init(void) 203 { 204 switch (idprom->id_machtype) { 205 case SM_SUN3 | SM_3_160: 206 case SM_SUN3 | SM_3_260: 207 platform_device_register_simple("sun3_scsi_vme", -1, 208 sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc)); 209 break; 210 case SM_SUN3 | SM_3_50: 211 case SM_SUN3 | SM_3_60: 212 platform_device_register_simple("sun3_scsi", -1, 213 sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc)); 214 break; 215 } 216 return 0; 217 } 218 219 arch_initcall(sun3_platform_init); 220 221 #endif 222