diff options
Diffstat (limited to 'kernel/arch/m68k/sun3/config.c')
| -rw-r--r-- | kernel/arch/m68k/sun3/config.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/kernel/arch/m68k/sun3/config.c b/kernel/arch/m68k/sun3/config.c new file mode 100644 index 000000000..a8b942bf7 --- /dev/null +++ b/kernel/arch/m68k/sun3/config.c @@ -0,0 +1,231 @@ +/* + * 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/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/seq_file.h> +#include <linux/tty.h> +#include <linux/console.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/platform_device.h> + +#include <asm/oplib.h> +#include <asm/setup.h> +#include <asm/contregs.h> +#include <asm/movs.h> +#include <asm/pgtable.h> +#include <asm/pgalloc.h> +#include <asm/sun3-head.h> +#include <asm/sun3mmu.h> +#include <asm/rtc.h> +#include <asm/machdep.h> +#include <asm/machines.h> +#include <asm/idprom.h> +#include <asm/intersil.h> +#include <asm/irq.h> +#include <asm/sections.h> +#include <asm/segment.h> +#include <asm/sun3ints.h> + +char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; + +extern u32 sun3_gettimeoffset(void); +static void sun3_sched_init(irq_handler_t handler); +extern void sun3_get_model (char* model); +extern int sun3_hwclk(int set, struct rtc_time *t); + +volatile char* clock_va; +extern unsigned long availmem; +unsigned long num_pages; + +static void sun3_get_hardware_list(struct seq_file *m) +{ + seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid); +} + +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 */ + +static 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; + + m68k_setup_node(0); + 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_reset = sun3_reboot; + arch_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; + + memory_start = ((((unsigned long)_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); +} + +static void __init sun3_sched_init(irq_handler_t timer_routine) +{ + 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(); +} + +#ifdef CONFIG_SUN3_SCSI + +static const struct resource sun3_scsi_vme_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = SUN3_VEC_VMESCSI0, + .end = SUN3_VEC_VMESCSI0, + }, { + .flags = IORESOURCE_MEM, + .start = 0xff200000, + .end = 0xff200021, + }, { + .flags = IORESOURCE_IRQ, + .start = SUN3_VEC_VMESCSI1, + .end = SUN3_VEC_VMESCSI1, + }, { + .flags = IORESOURCE_MEM, + .start = 0xff204000, + .end = 0xff204021, + }, +}; + +/* + * Int: level 2 autovector + * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0> + */ +static const struct resource sun3_scsi_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = 2, + .end = 2, + }, { + .flags = IORESOURCE_MEM, + .start = 0x00140000, + .end = 0x0014001f, + }, +}; + +int __init sun3_platform_init(void) +{ + switch (idprom->id_machtype) { + case SM_SUN3 | SM_3_160: + case SM_SUN3 | SM_3_260: + platform_device_register_simple("sun3_scsi_vme", -1, + sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc)); + break; + case SM_SUN3 | SM_3_50: + case SM_SUN3 | SM_3_60: + platform_device_register_simple("sun3_scsi", -1, + sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc)); + break; + } + return 0; +} + +arch_initcall(sun3_platform_init); + +#endif |