First round of commits for support for DECstations and Bagets.

1 files changed, 484 insertions, 0 deletions

diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
new file mode 100644
index 000000000..9999de881
--- /dev/null
+++ b/arch/mips/dec/setup.c
@@ -0,0 +1,484 @@
+/*
+ * Setup the interrupt stuff.
+ *
+ * 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) 1998 Harald Koerfgen
+ */
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/mc146818rtc.h>
+#include <linux/param.h>
+#include <asm/mipsregs.h>
+#include <asm/bootinfo.h>
+#include <asm/init.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+
+#include <asm/dec/interrupts.h>
+#include <asm/dec/kn01.h>
+#include <asm/dec/kn02.h>
+#include <asm/dec/kn02xa.h>
+#include <asm/dec/kn03.h>
+#include <asm/dec/ioasic_ints.h>
+
+extern asmlinkage void decstation_handle_int(void);
+
+void dec_init_kn01(void);
+void dec_init_kn230(void);
+void dec_init_kn02(void);
+void dec_init_kn02ba(void);
+void dec_init_kn02ca(void);
+void dec_init_kn03(void);
+
+char *dec_rtc_base = (char *) KN01_RTC_BASE;	/* Assume DS2100/3100 initially */
+
+decint_t dec_interrupt[NR_INTS];
+
+/* 
+ * Information regarding the IRQ Controller
+ *
+ * isr and imr are also hardcoded for different machines in int_handler.S
+ */
+
+volatile unsigned int *isr = 0L;	/* address of the interrupt status register     */
+volatile unsigned int *imr = 0L;	/* address of the interrupt mask register       */
+
+extern void dec_machine_restart(char *command);
+extern void dec_machine_halt(void);
+extern void dec_machine_power_off(void);
+
+extern void wbflush_setup(void);
+
+extern struct rtc_ops dec_rtc_ops;
+
+extern void intr_halt(void);
+
+extern int setup_dec_irq(int, struct irqaction *);
+
+void (*board_time_init) (struct irqaction * irq);
+
+__initfunc(static void dec_irq_setup(void))
+{
+    switch (mips_machtype) {
+    case MACH_DS23100:
+	dec_init_kn01();
+	break;
+    case MACH_DS5100:		/*  DS5100 MIPSMATE */
+	dec_init_kn230();
+	break;
+    case MACH_DS5000_200:	/* DS5000 3max */
+	dec_init_kn02();
+	break;
+    case MACH_DS5000_1XX:	/* DS5000/100 3min */
+	dec_init_kn02ba();
+	break;
+    case MACH_DS5000_2X0:	/* DS5000/240 3max+ */
+	dec_init_kn03();
+	break;
+    case MACH_DS5000_XX:	/* Personal DS5000/2x */
+	dec_init_kn02ca();
+	break;
+    case MACH_DS5800:		/* DS5800 Isis */
+	panic("Don't know how to set this up!");
+	break;
+    case MACH_DS5400:		/* DS5400 MIPSfair */
+	panic("Don't know how to set this up!");
+	break;
+    case MACH_DS5500:		/* DS5500 MIPSfair-2 */
+	panic("Don't know how to set this up!");
+	break;
+    }
+    set_except_vector(0, decstation_handle_int);
+}
+
+/*
+ * enable the periodic interrupts
+ */
+__initfunc(static void dec_time_init(struct irqaction *irq))
+{
+    /*
+     * Here we go, enable periodic rtc interrupts.
+     * Frequency is 128 Hz.
+     */
+    CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x9, RTC_REG_A);
+    CMOS_WRITE(CMOS_READ(RTC_REG_B) | RTC_PIE, RTC_REG_B);
+    setup_dec_irq(CLOCK, irq);
+}
+
+__initfunc(void decstation_setup(void))
+{
+    irq_setup = dec_irq_setup;
+    board_time_init = dec_time_init;
+
+    wbflush_setup();
+
+    _machine_restart = dec_machine_restart;
+    _machine_halt = dec_machine_halt;
+    _machine_power_off = dec_machine_power_off;
+
+    rtc_ops = &dec_rtc_ops;
+}
+
+/*
+ * Machine-specific initialisation for kn01, aka Pmax, aka DS2100, DS3100,
+ * and possibly also the DS5100.
+ */
+__initfunc(void dec_init_kn01(void))
+{
+    /*
+     * Setup some memory addresses.
+     */
+    dec_rtc_base = (char *) KN01_RTC_BASE;
+
+    /*
+     * Setup interrupt structure
+     */
+    dec_interrupt[CLOCK].cpu_mask = IE_IRQ3;
+    dec_interrupt[CLOCK].iemask = 0;
+    cpu_mask_tbl[0] = IE_IRQ3;
+    cpu_irq_nr[0] = CLOCK;
+
+    dec_interrupt[SCSI_INT].cpu_mask = IE_IRQ0;
+    dec_interrupt[SCSI_INT].iemask = 0;
+    cpu_mask_tbl[1] = IE_IRQ0;
+    cpu_irq_nr[1] = SCSI_INT;
+
+    dec_interrupt[ETHER].cpu_mask = IE_IRQ1;
+    dec_interrupt[ETHER].iemask = 0;
+    cpu_mask_tbl[2] = IE_IRQ1;
+    cpu_irq_nr[2] = ETHER;
+
+    dec_interrupt[SERIAL].cpu_mask = IE_IRQ2;
+    dec_interrupt[SERIAL].iemask = 0;
+    cpu_mask_tbl[3] = IE_IRQ2;
+    cpu_irq_nr[3] = SERIAL;
+
+    dec_interrupt[MEMORY].cpu_mask = IE_IRQ4;
+    dec_interrupt[MEMORY].iemask = 0;
+    cpu_mask_tbl[4] = IE_IRQ4;
+    cpu_irq_nr[4] = MEMORY;
+
+    dec_interrupt[FPU].cpu_mask = IE_IRQ5;
+    dec_interrupt[FPU].iemask = 0;
+    cpu_mask_tbl[5] = IE_IRQ5;
+    cpu_irq_nr[5] = FPU;
+}				/* dec_init_kn01 */
+
+/*
+ * Machine-specific initialisation for kn230, aka MIPSmate, aka DS5100
+ *
+ * There are a lot of experiments to do, this is definitely incomplete.
+ */
+__initfunc(void dec_init_kn230(void))
+{
+    /*
+     * Setup some memory addresses.
+     */
+    dec_rtc_base = (char *) KN01_RTC_BASE;
+
+    /*
+     * Setup interrupt structure
+     */
+    dec_interrupt[CLOCK].cpu_mask = IE_IRQ2;
+    dec_interrupt[CLOCK].iemask = 0;
+    cpu_mask_tbl[0] = IE_IRQ2;
+    cpu_irq_nr[0] = CLOCK;
+
+    dec_interrupt[FPU].cpu_mask = IE_IRQ5;
+    dec_interrupt[FPU].iemask = 0;
+    cpu_mask_tbl[5] = IE_IRQ5;
+    cpu_irq_nr[5] = FPU;
+}				/* dec_init_kn230 */
+
+/*
+ * Machine-specific initialisation for kn02, aka 3max, aka DS5000/2xx.
+ */
+__initfunc(void dec_init_kn02(void))
+{
+    /*
+     * Setup some memory addresses. FIXME: probably incomplete!
+     */
+    dec_rtc_base = (char *) KN02_RTC_BASE;
+    isr = (volatile unsigned int *) KN02_CSR_ADDR;
+    imr = (volatile unsigned int *) KN02_CSR_ADDR;
+
+    /*
+     * Setup IOASIC interrupt
+     */
+    cpu_ivec_tbl[1] = kn02_io_int;
+    cpu_mask_tbl[1] = IE_IRQ0;
+    cpu_irq_nr[1] = -1;
+    *imr = *imr & 0xff00ff00;
+
+    /*
+     * Setup interrupt structure
+     */
+    dec_interrupt[CLOCK].cpu_mask = IE_IRQ1;
+    dec_interrupt[CLOCK].iemask = 0;
+    cpu_mask_tbl[0] = IE_IRQ1;
+    cpu_irq_nr[0] = CLOCK;
+
+    dec_interrupt[SCSI_INT].cpu_mask = IE_IRQ0;
+    dec_interrupt[SCSI_INT].iemask = KN02_SLOT5;
+    asic_mask_tbl[0] = KN02_SLOT5;
+    asic_irq_nr[0] = SCSI_INT;
+
+    dec_interrupt[ETHER].cpu_mask = IE_IRQ0;
+    dec_interrupt[ETHER].iemask = KN02_SLOT6;
+    asic_mask_tbl[1] = KN02_SLOT6;
+    asic_irq_nr[1] = ETHER;
+
+    dec_interrupt[SERIAL].cpu_mask = IE_IRQ0;
+    dec_interrupt[SERIAL].iemask = KN02_SLOT7;
+    asic_mask_tbl[2] = KN02_SLOT7;
+    asic_irq_nr[2] = SERIAL;
+
+    dec_interrupt[TC0].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC0].iemask = KN02_SLOT0;
+    asic_mask_tbl[3] = KN02_SLOT0;
+    asic_irq_nr[3] = TC0;
+
+    dec_interrupt[TC1].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC1].iemask = KN02_SLOT1;
+    asic_mask_tbl[4] = KN02_SLOT1;
+    asic_irq_nr[4] = TC1;
+
+    dec_interrupt[TC2].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC2].iemask = KN02_SLOT2;
+    asic_mask_tbl[5] = KN02_SLOT2;
+    asic_irq_nr[5] = TC2;
+
+    dec_interrupt[MEMORY].cpu_mask = IE_IRQ3;
+    dec_interrupt[MEMORY].iemask = 0;
+    cpu_mask_tbl[1] = IE_IRQ3;
+    cpu_irq_nr[1] = MEMORY;
+
+    dec_interrupt[FPU].cpu_mask = IE_IRQ5;
+    dec_interrupt[FPU].iemask = 0;
+    cpu_mask_tbl[2] = IE_IRQ5;
+    cpu_irq_nr[2] = FPU;
+
+}				/* dec_init_kn02 */
+
+/*
+ * Machine-specific initialisation for kn02ba, aka 3min, aka DS5000/1xx.
+ */
+__initfunc(void dec_init_kn02ba(void))
+{
+    /*
+     * Setup some memory addresses.
+     */
+    dec_rtc_base = (char *) KN02XA_RTC_BASE;
+    isr = (volatile unsigned int *) KN02XA_SIR_ADDR;
+    imr = (volatile unsigned int *) KN02XA_SIRM_ADDR;
+
+    /*
+     * Setup IOASIC interrupt
+     */
+    cpu_mask_tbl[0] = IE_IRQ3;
+    cpu_irq_nr[0] = -1;
+    cpu_ivec_tbl[0] = kn02ba_io_int;
+    *imr = 0;
+
+    /*
+     * Setup interrupt structure
+     */
+    dec_interrupt[CLOCK].cpu_mask = IE_IRQ3;
+    dec_interrupt[CLOCK].iemask = KMIN_CLOCK;
+    asic_mask_tbl[0] = KMIN_CLOCK;
+    asic_irq_nr[0] = CLOCK;
+
+    dec_interrupt[SCSI_INT].cpu_mask = IE_IRQ3;
+    dec_interrupt[SCSI_INT].iemask = KMIN_SCSI_INTS;
+    asic_mask_tbl[1] = KMIN_SCSI_INTS;
+    asic_irq_nr[1] = SCSI_INT;
+
+    dec_interrupt[ETHER].cpu_mask = IE_IRQ3;
+    dec_interrupt[ETHER].iemask = LANCE_INTS;
+    asic_mask_tbl[2] = LANCE_INTS;
+    asic_irq_nr[2] = ETHER;
+
+    dec_interrupt[SERIAL].cpu_mask = IE_IRQ3;
+    dec_interrupt[SERIAL].iemask = SERIAL_INTS;
+    asic_mask_tbl[3] = SERIAL_INTS;
+    asic_irq_nr[3] = SERIAL;
+
+    dec_interrupt[MEMORY].cpu_mask = IE_IRQ3;
+    dec_interrupt[MEMORY].iemask = KMIN_TIMEOUT;
+    asic_mask_tbl[4] = KMIN_TIMEOUT;
+    asic_irq_nr[4] = MEMORY;
+
+    dec_interrupt[TC0].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC0].iemask = 0;
+    cpu_mask_tbl[1] = IE_IRQ0;
+    cpu_irq_nr[1] = TC0;
+
+    dec_interrupt[TC1].cpu_mask = IE_IRQ1;
+    dec_interrupt[TC1].iemask = 0;
+    cpu_mask_tbl[2] = IE_IRQ1;
+    cpu_irq_nr[2] = TC1;
+
+    dec_interrupt[TC2].cpu_mask = IE_IRQ2;
+    dec_interrupt[TC2].iemask = 0;
+    cpu_mask_tbl[3] = IE_IRQ2;
+    cpu_irq_nr[3] = TC2;
+
+    dec_interrupt[HALT].cpu_mask = IE_IRQ4;
+    dec_interrupt[HALT].iemask = 0;
+    cpu_mask_tbl[4] = IE_IRQ4;
+    cpu_irq_nr[4] = HALT;
+
+    dec_interrupt[FPU].cpu_mask = IE_IRQ5;
+    dec_interrupt[FPU].iemask = 0;
+    cpu_mask_tbl[5] = IE_IRQ5;
+    cpu_irq_nr[5] = FPU;
+
+}				/* dec_init_kn02ba */
+
+/*
+ * Machine-specific initialisation for kn02ca, aka maxine, aka DS5000/2x.
+ */
+__initfunc(void dec_init_kn02ca(void))
+{
+    /*
+     * Setup some memory addresses. FIXME: probably incomplete!
+     */
+    dec_rtc_base = (char *) KN02XA_RTC_BASE;
+    isr = (volatile unsigned int *) KN02XA_SIR_ADDR;
+    imr = (volatile unsigned int *) KN02XA_SIRM_ADDR;
+
+    /*
+     * Setup IOASIC interrupt
+     */
+    cpu_ivec_tbl[1] = kn02ba_io_int;
+    cpu_irq_nr[1] = -1;
+    cpu_mask_tbl[1] = IE_IRQ3;
+    *imr = 0;
+
+    /*
+     * Setup interrupt structure
+     */
+    dec_interrupt[CLOCK].cpu_mask = IE_IRQ1;
+    dec_interrupt[CLOCK].iemask = 0;
+    cpu_mask_tbl[0] = IE_IRQ1;
+    cpu_irq_nr[0] = CLOCK;
+
+    dec_interrupt[SCSI_INT].cpu_mask = IE_IRQ3;
+    dec_interrupt[SCSI_INT].iemask = SCSI_INTS;
+    asic_mask_tbl[0] = SCSI_INTS;
+    asic_irq_nr[0] = SCSI_INT;
+
+    dec_interrupt[ETHER].cpu_mask = IE_IRQ3;
+    dec_interrupt[ETHER].iemask = LANCE_INTS;
+    asic_mask_tbl[1] = LANCE_INTS;
+    asic_irq_nr[1] = ETHER;
+
+    dec_interrupt[SERIAL].cpu_mask = IE_IRQ3;
+    dec_interrupt[SERIAL].iemask = XINE_SERIAL_INTS;
+    asic_mask_tbl[2] = XINE_SERIAL_INTS;
+    asic_irq_nr[2] = SERIAL;
+
+    dec_interrupt[TC0].cpu_mask = IE_IRQ3;
+    dec_interrupt[TC0].iemask = MAXINE_TC0;
+    asic_mask_tbl[3] = MAXINE_TC0;
+    asic_irq_nr[3] = TC0;
+
+    dec_interrupt[TC1].cpu_mask = IE_IRQ3;
+    dec_interrupt[TC1].iemask = MAXINE_TC1;
+    asic_mask_tbl[4] = MAXINE_TC1;
+    asic_irq_nr[4] = TC1;
+
+    dec_interrupt[MEMORY].cpu_mask = IE_IRQ2;
+    dec_interrupt[MEMORY].iemask = 0;
+    cpu_mask_tbl[2] = IE_IRQ2;
+    cpu_irq_nr[2] = MEMORY;
+
+    dec_interrupt[HALT].cpu_mask = IE_IRQ4;
+    dec_interrupt[HALT].iemask = 0;
+    cpu_mask_tbl[3] = IE_IRQ4;
+    cpu_irq_nr[3] = HALT;
+
+    dec_interrupt[FPU].cpu_mask = IE_IRQ5;
+    dec_interrupt[FPU].iemask = 0;
+    cpu_mask_tbl[4] = IE_IRQ5;
+    cpu_irq_nr[4] = FPU;
+
+}				/* dec_init_kn02ca */
+
+/*
+ * Machine-specific initialisation for kn03, aka 3max+, aka DS5000/240.
+ */
+__initfunc(void dec_init_kn03(void))
+{
+    /*
+     * Setup some memory addresses. FIXME: probably incomplete!
+     */
+    dec_rtc_base = (char *) KN03_RTC_BASE;
+    isr = (volatile unsigned int *) KN03_SIR_ADDR;
+    imr = (volatile unsigned int *) KN03_SIRM_ADDR;
+
+    /*
+     * Setup IOASIC interrupt
+     */
+    cpu_ivec_tbl[1] = kn03_io_int;
+    cpu_mask_tbl[1] = IE_IRQ0;
+    cpu_irq_nr[1] = -1;
+    *imr = 0;
+
+    /*
+     * Setup interrupt structure
+     */
+    dec_interrupt[CLOCK].cpu_mask = IE_IRQ1;
+    dec_interrupt[CLOCK].iemask = 0;
+    cpu_mask_tbl[0] = IE_IRQ1;
+    cpu_irq_nr[0] = CLOCK;
+
+    dec_interrupt[SCSI_INT].cpu_mask = IE_IRQ0;
+    dec_interrupt[SCSI_INT].iemask = SCSI_INTS;
+    asic_mask_tbl[0] = SCSI_INTS;
+    asic_irq_nr[0] = SCSI_INT;
+
+    dec_interrupt[ETHER].cpu_mask = IE_IRQ0;
+    dec_interrupt[ETHER].iemask = LANCE_INTS;
+    asic_mask_tbl[1] = LANCE_INTS;
+    asic_irq_nr[1] = ETHER;
+
+    dec_interrupt[SERIAL].cpu_mask = IE_IRQ0;
+    dec_interrupt[SERIAL].iemask = SERIAL_INTS;
+    asic_mask_tbl[2] = SERIAL_INTS;
+    asic_irq_nr[2] = SERIAL;
+
+    dec_interrupt[TC0].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC0].iemask = KN03_TC0;
+    asic_mask_tbl[3] = KN03_TC0;
+    asic_irq_nr[3] = TC0;
+
+    dec_interrupt[TC1].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC1].iemask = KN03_TC1;
+    asic_mask_tbl[4] = KN03_TC1;
+    asic_irq_nr[4] = TC1;
+
+    dec_interrupt[TC2].cpu_mask = IE_IRQ0;
+    dec_interrupt[TC2].iemask = KN03_TC2;
+    asic_mask_tbl[5] = KN03_TC2;
+    asic_irq_nr[5] = TC2;
+
+    dec_interrupt[MEMORY].cpu_mask = IE_IRQ3;
+    dec_interrupt[MEMORY].iemask = 0;
+    cpu_mask_tbl[2] = IE_IRQ3;
+    cpu_irq_nr[2] = MEMORY;
+
+    dec_interrupt[HALT].cpu_mask = IE_IRQ4;
+    dec_interrupt[HALT].iemask = 0;
+    cpu_mask_tbl[3] = IE_IRQ4;
+    cpu_irq_nr[3] = HALT;
+
+    dec_interrupt[FPU].cpu_mask = IE_IRQ5;
+    dec_interrupt[FPU].iemask = 0;
+    cpu_mask_tbl[4] = IE_IRQ5;
+    cpu_irq_nr[4] = FPU;
+
+}				/* dec_init_kn03 */