patch-2.1.44 linux/arch/mips/deskstation/setup.c

• Lines: 111
• Date: Thu Jun 26 12:33:37 1997
• Orig file: v2.1.43/linux/arch/mips/deskstation/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.43/linux/arch/mips/deskstation/setup.c linux/arch/mips/deskstation/setup.c
@@ -0,0 +1,110 @@
+/*
+ * 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, 1997 by Ralf Baechle
+ */
+#include <linux/config.h>
+#include <linux/init.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/ptrace.h>
+#include <asm/mipsregs.h>
+#include <asm/reboot.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 deskstation_handle_int(void);
+extern asmlinkage void deskstation_fd_cacheflush(const void *addr, size_t size);
+extern struct feature deskstation_tyne_feature;
+extern struct feature deskstation_rpc44_feature;
+
+extern void deskstation_machine_reboot(void);
+extern void deskstation_machine_halt(void);
+extern void deskstation_machine_power_off(void);
+
+#ifdef CONFIG_DESKSTATION_TYNE
+unsigned long mips_dma_cache_size = 0;
+unsigned long mips_dma_cache_base = KSEG0;
+
+__initfunc(static void tyne_irq_setup(void))
+{
+	set_except_vector(0, deskstation_handle_int);
+	/* 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 */
+	request_region(0x20,0x20, "pic1");
+	request_region(0xa0,0x20, "pic2");	
+	setup_x86_irq(2, &irq2);
+}
+#endif
+
+#ifdef CONFIG_DESKSTATION_RPC44
+__initfunc(static void rpc44_irq_setup(void))
+{
+	/*
+	 * For the moment just steal the TYNE support.  In the
+	 * future, we need to consider merging the two -- imp
+	 */
+	set_except_vector(0, deskstation_handle_int);
+	/* 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 */
+	request_region(0x20,0x20, "pic1");
+	request_region(0xa0,0x20, "pic2");
+	setup_x86_irq(2, &irq2);
+	set_cp0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
+}
+#endif
+
+__initfunc(void deskstation_setup(void))
+{
+	switch(mips_machtype) {
+#ifdef CONFIG_DESKSTATION_TYNE
+	case MACH_DESKSTATION_TYNE:
+		atag = bi_TagFind(tag_dma_cache_size);
+		memcpy(&mips_dma_cache_size, TAGVALPTR(atag), atag->size);
+
+		atag = bi_TagFind(tag_dma_cache_base);
+		memcpy(&mips_dma_cache_base, TAGVALPTR(atag), atag->size);
+
+		irq_setup = tyne_irq_setup;
+                feature = &deskstation_tyne_feature;
+                isa_slot_offset = 0xe3000000;		// Will go away
+		break;
+#endif
+#ifdef CONFIG_DESKSTATION_RPC44
+	case MACH_DESKSTATION_RPC44:
+		irq_setup = rpc44_irq_setup;
+		mips_memory_upper = KSEG0 + (32 << 20); /* xxx fixme imp */
+		feature = &deskstation_rpc44_feature;	// Will go away
+		isa_slot_offset = 0xa0000000;
+		break;
+#endif
+	}
+	fd_cacheflush = deskstation_fd_cacheflush;
+	request_region(0x00,0x20,"dma1");
+	request_region(0x40,0x20,"timer");
+	request_region(0x70,0x10,"rtc");
+	request_region(0x80,0x10,"dma page reg");
+	request_region(0xc0,0x20,"dma2");
+}