11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/m68k/sun3/config.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1996,1997 Pekka Pietik{inen 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public 71da177e4SLinus Torvalds * License. See the file COPYING in the main directory of this archive 81da177e4SLinus Torvalds * for more details. 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds #include <linux/types.h> 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/mm.h> 141da177e4SLinus Torvalds #include <linux/tty.h> 151da177e4SLinus Torvalds #include <linux/console.h> 161da177e4SLinus Torvalds #include <linux/init.h> 171da177e4SLinus Torvalds #include <linux/bootmem.h> 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds #include <asm/oplib.h> 201da177e4SLinus Torvalds #include <asm/setup.h> 211da177e4SLinus Torvalds #include <asm/contregs.h> 221da177e4SLinus Torvalds #include <asm/movs.h> 231da177e4SLinus Torvalds #include <asm/pgtable.h> 2412d810c1SRoman Zippel #include <asm/pgalloc.h> 251da177e4SLinus Torvalds #include <asm/sun3-head.h> 261da177e4SLinus Torvalds #include <asm/sun3mmu.h> 271da177e4SLinus Torvalds #include <asm/rtc.h> 281da177e4SLinus Torvalds #include <asm/machdep.h> 291da177e4SLinus Torvalds #include <asm/intersil.h> 301da177e4SLinus Torvalds #include <asm/irq.h> 311da177e4SLinus Torvalds #include <asm/segment.h> 321da177e4SLinus Torvalds #include <asm/sun3ints.h> 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds extern char _text, _end; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds extern unsigned long sun3_gettimeoffset(void); 3907b81259SAdrian Bunk static void sun3_sched_init(irq_handler_t handler); 401da177e4SLinus Torvalds extern void sun3_get_model (char* model); 411da177e4SLinus Torvalds extern void idprom_init (void); 421da177e4SLinus Torvalds extern int sun3_hwclk(int set, struct rtc_time *t); 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds volatile char* clock_va; 451da177e4SLinus Torvalds extern volatile unsigned char* sun3_intreg; 461da177e4SLinus Torvalds extern unsigned long availmem; 471da177e4SLinus Torvalds unsigned long num_pages; 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds static int sun3_get_hardware_list(char *buffer) 501da177e4SLinus Torvalds { 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds int len = 0; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds len += sprintf(buffer + len, "PROM Revision:\t%s\n", 551da177e4SLinus Torvalds romvec->pv_monid); 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds return len; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds } 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds void __init sun3_init(void) 621da177e4SLinus Torvalds { 631da177e4SLinus Torvalds unsigned char enable_register; 641da177e4SLinus Torvalds int i; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds m68k_machtype= MACH_SUN3; 671da177e4SLinus Torvalds m68k_cputype = CPU_68020; 681da177e4SLinus Torvalds m68k_fputype = FPU_68881; /* mc68881 actually */ 691da177e4SLinus Torvalds m68k_mmutype = MMU_SUN3; 701da177e4SLinus Torvalds clock_va = (char *) 0xfe06000; /* dark */ 711da177e4SLinus Torvalds sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */ 721da177e4SLinus Torvalds sun3_disable_interrupts(); 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds prom_init((void *)LINUX_OPPROM_BEGVM); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds GET_CONTROL_BYTE(AC_SENABLE,enable_register); 771da177e4SLinus Torvalds enable_register |= 0x50; /* Enable FPU */ 781da177e4SLinus Torvalds SET_CONTROL_BYTE(AC_SENABLE,enable_register); 791da177e4SLinus Torvalds GET_CONTROL_BYTE(AC_SENABLE,enable_register); 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds /* This code looks suspicious, because it doesn't subtract 821da177e4SLinus Torvalds memory belonging to the kernel from the available space */ 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg)); 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds /* Reserve important PMEGS */ 881da177e4SLinus Torvalds /* FIXME: These should be probed instead of hardcoded */ 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds for (i=0; i<8; i++) /* Kernel PMEGs */ 911da177e4SLinus Torvalds sun3_reserved_pmeg[i] = 1; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds sun3_reserved_pmeg[247] = 1; /* ROM mapping */ 941da177e4SLinus Torvalds sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */ 951da177e4SLinus Torvalds sun3_reserved_pmeg[251] = 1; /* VB area */ 961da177e4SLinus Torvalds sun3_reserved_pmeg[254] = 1; /* main I/O */ 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds sun3_reserved_pmeg[249] = 1; 991da177e4SLinus Torvalds sun3_reserved_pmeg[252] = 1; 1001da177e4SLinus Torvalds sun3_reserved_pmeg[253] = 1; 1011da177e4SLinus Torvalds set_fs(KERNEL_DS); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds /* Without this, Bad Things happen when something calls arch_reset. */ 1051da177e4SLinus Torvalds static void sun3_reboot (void) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds prom_reboot ("vmlinux"); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static void sun3_halt (void) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds prom_halt (); 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds /* sun3 bootmem allocation */ 1161da177e4SLinus Torvalds 11707b81259SAdrian Bunk static void __init sun3_bootmem_alloc(unsigned long memory_start, 11807b81259SAdrian Bunk unsigned long memory_end) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds unsigned long start_page; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds /* align start/end to page boundaries */ 1231da177e4SLinus Torvalds memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK); 1241da177e4SLinus Torvalds memory_end = memory_end & PAGE_MASK; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds start_page = __pa(memory_start) >> PAGE_SHIFT; 1271da177e4SLinus Torvalds num_pages = __pa(memory_end) >> PAGE_SHIFT; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds high_memory = (void *)memory_end; 1301da177e4SLinus Torvalds availmem = memory_start; 1311da177e4SLinus Torvalds 13212d810c1SRoman Zippel m68k_setup_node(0); 1331da177e4SLinus Torvalds availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages); 1341da177e4SLinus Torvalds availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds free_bootmem(__pa(availmem), memory_end - (availmem)); 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds void __init config_sun3(void) 1411da177e4SLinus Torvalds { 1421da177e4SLinus Torvalds unsigned long memory_start, memory_end; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds printk("ARCH: SUN3\n"); 1451da177e4SLinus Torvalds idprom_init(); 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds /* Subtract kernel memory from available memory */ 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds mach_sched_init = sun3_sched_init; 1501da177e4SLinus Torvalds mach_init_IRQ = sun3_init_IRQ; 1511da177e4SLinus Torvalds mach_reset = sun3_reboot; 1521da177e4SLinus Torvalds mach_gettimeoffset = sun3_gettimeoffset; 1531da177e4SLinus Torvalds mach_get_model = sun3_get_model; 1541da177e4SLinus Torvalds mach_hwclk = sun3_hwclk; 1551da177e4SLinus Torvalds mach_halt = sun3_halt; 1561da177e4SLinus Torvalds mach_get_hardware_list = sun3_get_hardware_list; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds memory_start = ((((int)&_end) + 0x2000) & ~0x1fff); 1591da177e4SLinus Torvalds // PROM seems to want the last couple of physical pages. --m 1601da177e4SLinus Torvalds memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds m68k_num_memory=1; 1631da177e4SLinus Torvalds m68k_memory[0].size=*(romvec->pv_sun3mem); 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds sun3_bootmem_alloc(memory_start, memory_end); 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds 16807b81259SAdrian Bunk static void __init sun3_sched_init(irq_handler_t timer_routine) 1691da177e4SLinus Torvalds { 1701da177e4SLinus Torvalds sun3_disable_interrupts(); 1711da177e4SLinus Torvalds intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); 1721da177e4SLinus Torvalds intersil_clock->int_reg=INTERSIL_HZ_100_MASK; 1731da177e4SLinus Torvalds intersil_clear(); 1741da177e4SLinus Torvalds sun3_enable_irq(5); 1751da177e4SLinus Torvalds intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); 1761da177e4SLinus Torvalds sun3_enable_interrupts(); 1771da177e4SLinus Torvalds intersil_clear(); 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds 180