diff options
Diffstat (limited to 'arch/mips/sni/setup.c')
| -rw-r--r-- | arch/mips/sni/setup.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/mips/sni/setup.c b/arch/mips/sni/setup.c new file mode 100644 index 000000000..a4cc4a57f --- /dev/null +++ b/arch/mips/sni/setup.c @@ -0,0 +1,108 @@ +/* + * Setup pointers to hardware dependand routines. + * + * 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. + * + * Copyright (C) 1996 by Ralf Baechle + */ +#include <asm/ptrace.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/processor.h> +#include <asm/vector.h> + +/* + * Initial irq handlers. + */ +static void no_action(int cpl, void *dev_id, struct pt_regs *regs) { } + +/* + * IRQ2 is cascade interrupt to second interrupt controller + */ +static struct irqaction irq2 = { no_action, 0, 0, "cascade", NULL, NULL}; + +extern asmlinkage void sni_rm200_pci_handle_int(void); +extern asmlinkage void sni_fd_cacheflush(const void *addr, size_t size); +extern struct feature sni_rm200_pci_feature; +extern void sni_hard_reset_now(void); + +static void +sni_irq_setup(void) +{ + set_except_vector(0, sni_rm200_pci_handle_int); + request_region(0x20,0x20, "pic1"); + request_region(0xa0,0x20, "pic2"); + setup_x86_irq(2, &irq2); + /* + * IRQ0 seems to be the irq for PC style stuff. + * I don't know how to handle the debug button interrupt, so + * don't use this button yet or bad things happen ... + */ + set_cp0_status(ST0_IM, IE_IRQ0); +} + +void (*board_time_init)(struct irqaction *irq); + +static void sni_rm200_pci_time_init(struct irqaction *irq) +{ + /* set the clock to 100 Hz */ + outb_p(0x34,0x43); /* binary, mode 2, LSB/MSB, ch 0 */ + outb_p(LATCH & 0xff , 0x40); /* LSB */ + outb(LATCH >> 8 , 0x40); /* MSB */ + setup_x86_irq(0, irq); +} + +unsigned char aux_device_present; + +void +sni_rm200_pci_setup(void) +{ + tag *atag; + + /* + * We just check if a tag_screen_info can be gathered + * in setup_arch(), if yes we don't proceed futher... + */ + atag = bi_TagFind(tag_screen_info); + if (!atag) { + /* + * If no, we try to find the tag_arc_displayinfo which is + * always created by Milo for an ARC box (for now Milo only + * works on ARC boxes :) -Stoned. + */ + atag = bi_TagFind(tag_arcdisplayinfo); + if (atag) { + screen_info.orig_x = + ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->cursor_x; + screen_info.orig_y = + ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->cursor_y; + screen_info.orig_video_cols = + ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->columns; + screen_info.orig_video_lines = + ((mips_arc_DisplayInfo*)TAGVALPTR(atag))->lines; + } + } + + irq_setup = sni_irq_setup; + fd_cacheflush = sni_fd_cacheflush; // Will go away + feature = &sni_rm200_pci_feature; + port_base = PORT_BASE_SNI; + isa_slot_offset = 0xb0000000; + request_region(0x00,0x20,"dma1"); + request_region(0x40,0x20,"timer"); + request_region(0x70,0x10,"rtc"); + board_time_init = sni_rm200_pci_time_init; + + hard_reset_now = sni_hard_reset_now; + + if (mips_machtype == MACH_SNI_RM200_PCI) + EISA_bus = 1; + aux_device_present = 0xaa; +} |