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/config.h> 12#include <linux/types.h> 13#include <linux/kernel.h> 14#include <linux/mm.h> 15#include <linux/tty.h> 16#include <linux/console.h> 17#include <linux/init.h> 18#include <linux/bootmem.h> 19 20#include <asm/oplib.h> 21#include <asm/setup.h> 22#include <asm/contregs.h> 23#include <asm/movs.h> 24#include <asm/pgtable.h> 25#include <asm/sun3-head.h> 26#include <asm/sun3mmu.h> 27#include <asm/rtc.h> 28#include <asm/machdep.h> 29#include <asm/intersil.h> 30#include <asm/irq.h> 31#include <asm/segment.h> 32#include <asm/sun3ints.h> 33 34extern char _text, _end; 35 36char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; 37 38extern unsigned long sun3_gettimeoffset(void); 39extern int sun3_get_irq_list (char *); 40extern void sun3_sched_init(void (*handler)(int, void *, struct pt_regs *)); 41extern void sun3_get_model (char* model); 42extern void idprom_init (void); 43extern void sun3_gettod (int *yearp, int *monp, int *dayp, 44 int *hourp, int *minp, int *secp); 45extern int sun3_hwclk(int set, struct rtc_time *t); 46 47extern void sun_serial_setup(void); 48volatile char* clock_va; 49extern volatile unsigned char* sun3_intreg; 50extern unsigned long availmem; 51unsigned long num_pages; 52 53void __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 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. */ 96static void sun3_reboot (void) 97{ 98 prom_reboot ("vmlinux"); 99} 100 101static void sun3_halt (void) 102{ 103 prom_halt (); 104} 105 106/* sun3 bootmem allocation */ 107 108void __init sun3_bootmem_alloc(unsigned long memory_start, unsigned long memory_end) 109{ 110 unsigned long start_page; 111 112 /* align start/end to page boundries */ 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 num_pages = __pa(memory_end) >> PAGE_SHIFT; 118 119 high_memory = (void *)memory_end; 120 availmem = memory_start; 121 122 availmem += init_bootmem(start_page, num_pages); 123 availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; 124 125 free_bootmem(__pa(availmem), memory_end - (availmem)); 126} 127 128 129void __init config_sun3(void) 130{ 131 unsigned long memory_start, memory_end; 132 133 printk("ARCH: SUN3\n"); 134 idprom_init(); 135 136 /* Subtract kernel memory from available memory */ 137 138 mach_sched_init = sun3_sched_init; 139 mach_init_IRQ = sun3_init_IRQ; 140 mach_default_handler = &sun3_default_handler; 141 mach_request_irq = sun3_request_irq; 142 mach_free_irq = sun3_free_irq; 143#ifdef CONFIG_VT 144// mach_keyb_init = sun3_keyb_init; 145#endif 146 enable_irq = sun3_enable_irq; 147 disable_irq = sun3_disable_irq; 148 mach_process_int = sun3_process_int; 149 mach_get_irq_list = sun3_get_irq_list; 150 mach_gettod = sun3_gettod; 151 mach_reset = sun3_reboot; 152 mach_gettimeoffset = sun3_gettimeoffset; 153 mach_get_model = sun3_get_model; 154 mach_hwclk = sun3_hwclk; 155 mach_halt = sun3_halt; 156#if !defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) 157 conswitchp = &dummy_con; 158#endif 159 160 memory_start = ((((int)&_end) + 0x2000) & ~0x1fff); 161// PROM seems to want the last couple of physical pages. --m 162 memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; 163 164 m68k_num_memory=1; 165 m68k_memory[0].size=*(romvec->pv_sun3mem); 166 167 sun3_bootmem_alloc(memory_start, memory_end); 168 169#ifdef CONFIG_SUN3X_ZS 170 sun_serial_setup(); 171#endif 172} 173 174void __init sun3_sched_init(void (*timer_routine)(int, void *, struct pt_regs *)) 175{ 176 sun3_disable_interrupts(); 177 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); 178 intersil_clock->int_reg=INTERSIL_HZ_100_MASK; 179 intersil_clear(); 180 sun3_enable_irq(5); 181 intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); 182 sun3_enable_interrupts(); 183 intersil_clear(); 184} 185 186