/* * linux/arch/m68k/sun3/config.c * * Copyright (C) 1996,1997 Pekka Pietik{inen * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #include <linux/config.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/tty.h> #include <linux/console.h> #include <linux/init.h> #include <linux/bootmem.h> #include <asm/oplib.h> #include <asm/setup.h> #include <asm/contregs.h> #include <asm/movs.h> #include <asm/pgtable.h> #include <asm/sun3-head.h> #include <asm/sun3mmu.h> #include <asm/rtc.h> #include <asm/machdep.h> #include <asm/intersil.h> #include <asm/irq.h> #include <asm/segment.h> #include <asm/sun3ints.h> extern char _text, _end; char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; extern unsigned long sun3_gettimeoffset(void); extern int show_sun3_interrupts (struct seq_file *, void *); extern void sun3_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); extern void sun3_get_model (char* model); extern void idprom_init (void); extern int sun3_hwclk(int set, struct rtc_time *t); volatile char* clock_va; extern volatile unsigned char* sun3_intreg; extern unsigned long availmem; unsigned long num_pages; static int sun3_get_hardware_list(char *buffer) { int len = 0; len += sprintf(buffer + len, "PROM Revision:\t%s\n", romvec->pv_monid); return len; } void __init sun3_init(void) { unsigned char enable_register; int i; m68k_machtype= MACH_SUN3; m68k_cputype = CPU_68020; m68k_fputype = FPU_68881; /* mc68881 actually */ m68k_mmutype = MMU_SUN3; clock_va = (char *) 0xfe06000; /* dark */ sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */ sun3_disable_interrupts(); prom_init((void *)LINUX_OPPROM_BEGVM); GET_CONTROL_BYTE(AC_SENABLE,enable_register); enable_register |= 0x50; /* Enable FPU */ SET_CONTROL_BYTE(AC_SENABLE,enable_register); GET_CONTROL_BYTE(AC_SENABLE,enable_register); /* This code looks suspicious, because it doesn't subtract memory belonging to the kernel from the available space */ memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg)); /* Reserve important PMEGS */ /* FIXME: These should be probed instead of hardcoded */ for (i=0; i<8; i++) /* Kernel PMEGs */ sun3_reserved_pmeg[i] = 1; sun3_reserved_pmeg[247] = 1; /* ROM mapping */ sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */ sun3_reserved_pmeg[251] = 1; /* VB area */ sun3_reserved_pmeg[254] = 1; /* main I/O */ sun3_reserved_pmeg[249] = 1; sun3_reserved_pmeg[252] = 1; sun3_reserved_pmeg[253] = 1; set_fs(KERNEL_DS); } /* Without this, Bad Things happen when something calls arch_reset. */ static void sun3_reboot (void) { prom_reboot ("vmlinux"); } static void sun3_halt (void) { prom_halt (); } /* sun3 bootmem allocation */ void __init sun3_bootmem_alloc(unsigned long memory_start, unsigned long memory_end) { unsigned long start_page; /* align start/end to page boundaries */ memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK); memory_end = memory_end & PAGE_MASK; start_page = __pa(memory_start) >> PAGE_SHIFT; num_pages = __pa(memory_end) >> PAGE_SHIFT; high_memory = (void *)memory_end; availmem = memory_start; availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages); availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; free_bootmem(__pa(availmem), memory_end - (availmem)); } void __init config_sun3(void) { unsigned long memory_start, memory_end; printk("ARCH: SUN3\n"); idprom_init(); /* Subtract kernel memory from available memory */ mach_sched_init = sun3_sched_init; mach_init_IRQ = sun3_init_IRQ; mach_default_handler = &sun3_default_handler; mach_request_irq = sun3_request_irq; mach_free_irq = sun3_free_irq; enable_irq = sun3_enable_irq; disable_irq = sun3_disable_irq; mach_process_int = sun3_process_int; mach_get_irq_list = show_sun3_interrupts; mach_reset = sun3_reboot; mach_gettimeoffset = sun3_gettimeoffset; mach_get_model = sun3_get_model; mach_hwclk = sun3_hwclk; mach_halt = sun3_halt; mach_get_hardware_list = sun3_get_hardware_list; #if defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif memory_start = ((((int)&_end) + 0x2000) & ~0x1fff); // PROM seems to want the last couple of physical pages. --m memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; m68k_num_memory=1; m68k_memory[0].size=*(romvec->pv_sun3mem); sun3_bootmem_alloc(memory_start, memory_end); } void __init sun3_sched_init(irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) { sun3_disable_interrupts(); intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); intersil_clock->int_reg=INTERSIL_HZ_100_MASK; intersil_clear(); sun3_enable_irq(5); intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); sun3_enable_interrupts(); intersil_clear(); }