config.c
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上传日期:2013-02-24
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- /*
- * 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 sun3_get_irq_list (char *);
- extern void sun3_sched_init(void (*handler)(int, void *, struct pt_regs *));
- extern void sun3_get_model (char* model);
- extern void idprom_init (void);
- extern void sun3_gettod (int *yearp, int *monp, int *dayp,
- int *hourp, int *minp, int *secp);
- extern int sun3_hwclk(int set, struct hwclk_time *t);
- extern void sun_serial_setup(void);
- volatile char* clock_va;
- extern volatile unsigned char* sun3_intreg;
- extern unsigned long availmem;
- unsigned long num_pages;
- 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 boundries */
- 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(start_page, 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: SUN3n");
- 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;
- // mach_keyb_init = sun3_keyb_init;
- enable_irq = sun3_enable_irq;
- disable_irq = sun3_disable_irq;
- mach_process_int = sun3_process_int;
- mach_get_irq_list = sun3_get_irq_list;
- mach_gettod = sun3_gettod;
- mach_reset = sun3_reboot;
- mach_gettimeoffset = sun3_gettimeoffset;
- mach_get_model = sun3_get_model;
- mach_hwclk = sun3_hwclk;
- mach_halt = sun3_halt;
- #if !defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_FB)
- 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);
- sun_serial_setup();
- }
- void __init sun3_sched_init(void (*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();
- }