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();
+}
+