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