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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | /* * 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(); } |