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 39 char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; 40 41 extern u32 sun3_gettimeoffset(void); 42 static void sun3_sched_init(irq_handler_t handler); 43 extern void sun3_get_model (char* model); 44 extern int sun3_hwclk(int set, struct rtc_time *t); 45 46 volatile char* clock_va; 47 extern unsigned long availmem; 48 unsigned long num_pages; 49 50 static void sun3_get_hardware_list(struct seq_file *m) 51 { 52 seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid); 53 } 54 55 void __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. */ 99 static void sun3_reboot (void) 100 { 101 prom_reboot ("vmlinux"); 102 } 103 104 static void sun3_halt (void) 105 { 106 prom_halt (); 107 } 108 109 /* sun3 bootmem allocation */ 110 111 static 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 max_pfn = 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(start_page, num_pages); 128 availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; 129 130 free_bootmem(__pa(availmem), memory_end - (availmem)); 131 } 132 133 134 void __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 } 161 162 static 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 #if IS_ENABLED(CONFIG_SUN3_SCSI) 175 176 static 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 */ 200 static 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 }; 211 212 int __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 } 228 229 arch_initcall(sun3_platform_init); 230 231 #endif 232