diff options
Diffstat (limited to 'arch/m68k/sun3/config.c')
| -rw-r--r-- | arch/m68k/sun3/config.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/arch/m68k/sun3/config.c b/arch/m68k/sun3/config.c new file mode 100644 index 000000000000..77d05bcc3221 --- /dev/null +++ b/arch/m68k/sun3/config.c @@ -0,0 +1,188 @@ +/* + * 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(); +} + |