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