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-rw-r--r--arch/mips/dec/Makefile8
-rw-r--r--arch/mips/dec/Platform8
-rw-r--r--arch/mips/dec/boot/Makefile12
-rw-r--r--arch/mips/dec/boot/decstation.c83
-rw-r--r--arch/mips/dec/boot/ld.ecoff43
-rw-r--r--arch/mips/dec/ecc-berr.c68
-rw-r--r--arch/mips/dec/int-handler.S128
-rw-r--r--arch/mips/dec/ioasic-irq.c157
-rw-r--r--arch/mips/dec/kn01-berr.c200
-rw-r--r--arch/mips/dec/kn02-irq.c92
-rw-r--r--arch/mips/dec/kn02xa-berr.c139
-rw-r--r--arch/mips/dec/platform.c44
-rw-r--r--arch/mips/dec/prom/Makefile5
-rw-r--r--arch/mips/dec/prom/call_o32.S91
-rw-r--r--arch/mips/dec/prom/console.c42
-rw-r--r--arch/mips/dec/prom/dectypes.h2
-rw-r--r--arch/mips/dec/prom/identify.c37
-rw-r--r--arch/mips/dec/prom/init.c24
-rw-r--r--arch/mips/dec/prom/locore.S1
-rw-r--r--arch/mips/dec/prom/memory.c38
-rw-r--r--arch/mips/dec/promcon.c55
-rw-r--r--arch/mips/dec/reset.c15
-rw-r--r--arch/mips/dec/setup.c104
-rw-r--r--arch/mips/dec/tc.c95
-rw-r--r--arch/mips/dec/time.c181
-rw-r--r--arch/mips/dec/wbflush.c8
26 files changed, 882 insertions, 798 deletions
diff --git a/arch/mips/dec/Makefile b/arch/mips/dec/Makefile
index 688757a97cb..bd74e05c90b 100644
--- a/arch/mips/dec/Makefile
+++ b/arch/mips/dec/Makefile
@@ -2,10 +2,8 @@
# Makefile for the DECstation family specific parts of the kernel
#
-obj-y := ecc-berr.o int-handler.o ioasic-irq.o kn02-irq.o reset.o \
- setup.o time.o
+obj-y := ecc-berr.o int-handler.o ioasic-irq.o kn01-berr.o \
+ kn02-irq.o kn02xa-berr.o platform.o reset.o setup.o time.o
-obj-$(CONFIG_PROM_CONSOLE) += promcon.o
+obj-$(CONFIG_TC) += tc.o
obj-$(CONFIG_CPU_HAS_WB) += wbflush.o
-
-EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/dec/Platform b/arch/mips/dec/Platform
new file mode 100644
index 00000000000..cf55a6f4e72
--- /dev/null
+++ b/arch/mips/dec/Platform
@@ -0,0 +1,8 @@
+#
+# DECstation family
+#
+platform-$(CONFIG_MACH_DECSTATION) += dec/
+cflags-$(CONFIG_MACH_DECSTATION) += \
+ -I$(srctree)/arch/mips/include/asm/mach-dec
+libs-$(CONFIG_MACH_DECSTATION) += arch/mips/dec/prom/
+load-$(CONFIG_MACH_DECSTATION) += 0xffffffff80040000
diff --git a/arch/mips/dec/boot/Makefile b/arch/mips/dec/boot/Makefile
deleted file mode 100644
index bcea41698ef..00000000000
--- a/arch/mips/dec/boot/Makefile
+++ /dev/null
@@ -1,12 +0,0 @@
-#
-# Makefile for the DECstation family specific parts of the kernel
-#
-
-netboot: all
- $(LD) -N -G 0 -T ld.ecoff ../../boot/zImage \
- dec_boot.o ramdisk.img -o nbImage
-
-obj-y := decstation.o
-
-clean:
- rm -f nbImage
diff --git a/arch/mips/dec/boot/decstation.c b/arch/mips/dec/boot/decstation.c
deleted file mode 100644
index 56fd4277555..00000000000
--- a/arch/mips/dec/boot/decstation.c
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * arch/mips/dec/decstation.c
- */
-
-#define RELOC
-#define INITRD
-#define DEBUG_BOOT
-
-/*
- * Magic number indicating REX PROM available on DECSTATION.
- */
-#define REX_PROM_MAGIC 0x30464354
-
-#define REX_PROM_CLEARCACHE 0x7c/4
-#define REX_PROM_PRINTF 0x30/4
-
-#define VEC_RESET 0xBFC00000 /* Prom base address */
-#define PMAX_PROM_ENTRY(x) (VEC_RESET+((x)*8)) /* Prom jump table */
-#define PMAX_PROM_PRINTF PMAX_PROM_ENTRY(17)
-
-#define PARAM (k_start + 0x2000)
-
-#define LOADER_TYPE (*(unsigned char *) (PARAM+0x210))
-#define INITRD_START (*(unsigned long *) (PARAM+0x218))
-#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
-
-extern int _ftext, _end; /* begin and end of kernel image */
-extern void kernel_entry(int, char **, unsigned long, int *);
-
-void * memcpy(void * dest, const void *src, unsigned int count)
-{
- unsigned long *tmp = (unsigned long *) dest, *s = (unsigned long *) src;
-
- count >>= 2;
- while (count--)
- *tmp++ = *s++;
-
- return dest;
-}
-
-void dec_entry(int argc, char **argv,
- unsigned long magic, int *prom_vec)
-{
- void (*rex_clear_cache)(void);
- int (*prom_printf)(char *, ...);
- unsigned long k_start, len;
-
- /*
- * The DS5100 leaves cpu with BEV enabled, clear it.
- */
- asm( "lui\t$8,0x3000\n\t"
- "mtc0\t$8,$12\n\t"
- ".section\t.sdata\n\t"
- ".section\t.sbss\n\t"
- ".section\t.text"
- : : : "$8");
-
-#ifdef DEBUG_BOOT
- if (magic == REX_PROM_MAGIC) {
- prom_printf = (int (*)(char *, ...)) *(prom_vec + REX_PROM_PRINTF);
- } else {
- prom_printf = (int (*)(char *, ...)) PMAX_PROM_PRINTF;
- }
- prom_printf("Launching kernel...\n");
-#endif
-
- k_start = (unsigned long) (&kernel_entry) & 0xffff0000;
-
-#ifdef RELOC
- /*
- * Now copy kernel image to its destination.
- */
- len = ((unsigned long) (&_end) - k_start);
- memcpy((void *)k_start, &_ftext, len);
-#endif
-
- if (magic == REX_PROM_MAGIC) {
- rex_clear_cache = (void (*)(void)) * (prom_vec + REX_PROM_CLEARCACHE);
- rex_clear_cache();
- }
-
- kernel_entry(argc, argv, magic, prom_vec);
-}
diff --git a/arch/mips/dec/boot/ld.ecoff b/arch/mips/dec/boot/ld.ecoff
deleted file mode 100644
index aaa633dfb5f..00000000000
--- a/arch/mips/dec/boot/ld.ecoff
+++ /dev/null
@@ -1,43 +0,0 @@
-OUTPUT_FORMAT("ecoff-littlemips")
-OUTPUT_ARCH(mips)
-ENTRY(dec_entry)
-SECTIONS
-{
- . = 0x80200000;
-
- .text :
- {
- _ftext = .;
- *(.text)
- *(.fixup)
- }
- .rdata :
- {
- *(.rodata .rodata.* .rdata)
- }
- .data :
- {
- . = ALIGN(0x1000);
- ramdisk.img (.data)
- *(.data)
- }
- .sdata :
- {
- *(.sdata)
- }
- _gp = .;
- .sbss :
- {
- *(.sbss)
- *(.scommon)
- }
- .bss :
- {
- *(.dynbss)
- *(.bss)
- *(COMMON)
- }
- /DISCARD/ : {
- *(.reginfo .mdebug .note)
- }
-}
diff --git a/arch/mips/dec/ecc-berr.c b/arch/mips/dec/ecc-berr.c
index 133fb7c48e6..2a66e908f6a 100644
--- a/arch/mips/dec/ecc-berr.c
+++ b/arch/mips/dec/ecc-berr.c
@@ -1,12 +1,10 @@
/*
- * linux/arch/mips/dec/ecc-berr.c
- *
* Bus error event handling code for systems equipped with ECC
* handling logic, i.e. DECstation/DECsystem 5000/200 (KN02),
* 5000/240 (KN03), 5000/260 (KN05) and DECsystem 5900 (KN03),
* 5900/260 (KN05) systems.
*
- * Copyright (c) 2003 Maciej W. Rozycki
+ * Copyright (c) 2003, 2005 Maciej W. Rozycki
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -15,16 +13,18 @@
*/
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/sched.h>
-#include <linux/spinlock.h>
#include <linux/types.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
+#include <asm/cpu-type.h>
+#include <asm/irq_regs.h>
#include <asm/processor.h>
-#include <asm/system.h>
+#include <asm/ptrace.h>
#include <asm/traps.h>
#include <asm/dec/ecc.h>
@@ -57,7 +57,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
const char *kind, *agent, *cycle, *event;
const char *status = "", *xbit = "", *fmt = "";
- dma_addr_t address;
+ unsigned long address;
u16 syn = 0, sngl;
int i = 0;
@@ -66,7 +66,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
u32 chksyn = *kn0x_chksyn;
int action = MIPS_BE_FATAL;
- /* For non-ECC ack ASAP, so any subsequent errors get caught. */
+ /* For non-ECC ack ASAP, so that any subsequent errors get caught. */
if ((erraddr & (KN0X_EAR_VALID | KN0X_EAR_ECCERR)) == KN0X_EAR_VALID)
dec_ecc_be_ack();
@@ -74,7 +74,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
if (!(erraddr & KN0X_EAR_VALID)) {
/* No idea what happened. */
- printk(KERN_ALERT "Unidentified bus error %s.\n", kind);
+ printk(KERN_ALERT "Unidentified bus error %s\n", kind);
return action;
}
@@ -126,7 +126,7 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
/* Ack now, no rewrite will happen. */
dec_ecc_be_ack();
- fmt = KERN_ALERT "%s" "invalid.\n";
+ fmt = KERN_ALERT "%s" "invalid\n";
} else {
sngl = syn & KN0X_ESR_SNGLO;
syn &= KN0X_ESR_SYNLO;
@@ -144,7 +144,8 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
} else if (!sngl) {
status = dbestr;
} else {
- volatile u32 *ptr = (void *)KSEG1ADDR(address);
+ volatile u32 *ptr =
+ (void *)CKSEG1ADDR(address);
*ptr = *ptr; /* Rewrite. */
iob();
@@ -160,12 +161,12 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
if (syn == 0x01) {
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error "
- "at check bit C%s.\n";
+ "at check bit C%s\n";
xbit = "X";
} else {
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error "
- "at check bit C%s%u.\n";
+ "at check bit C%s%u\n";
}
i = syn >> 2;
} else {
@@ -175,16 +176,16 @@ static int dec_ecc_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
if (i < 32)
fmt = KERN_ALERT "%s"
"%#04x -- %s bit error "
- "at data bit D%s%u.\n";
+ "at data bit D%s%u\n";
else
fmt = KERN_ALERT "%s"
- "%#04x -- %s bit error.\n";
+ "%#04x -- %s bit error\n";
}
}
}
if (action != MIPS_BE_FIXUP)
- printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx.\n",
+ printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n",
kind, agent, cycle, event, address);
if (action != MIPS_BE_FIXUP && erraddr & KN0X_EAR_ECCERR)
@@ -198,16 +199,18 @@ int dec_ecc_be_handler(struct pt_regs *regs, int is_fixup)
return dec_ecc_be_backend(regs, is_fixup, 0);
}
-irqreturn_t dec_ecc_be_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t dec_ecc_be_interrupt(int irq, void *dev_id)
{
+ struct pt_regs *regs = get_irq_regs();
+
int action = dec_ecc_be_backend(regs, 0, 1);
if (action == MIPS_BE_DISCARD)
- return IRQ_NONE;
+ return IRQ_HANDLED;
/*
- * FIXME: Find affected processes and kill them, otherwise we
- * must die.
+ * FIXME: Find the affected processes and kill them, otherwise
+ * we must die.
*
* The interrupt is asynchronously delivered thus EPC and RA
* may be irrelevant, but are printed for a reference.
@@ -225,16 +228,13 @@ irqreturn_t dec_ecc_be_interrupt(int irq, void *dev_id, struct pt_regs *regs)
*/
static inline void dec_kn02_be_init(void)
{
- volatile u32 *csr = (void *)KN02_CSR_BASE;
- unsigned long flags;
-
- kn0x_erraddr = (void *)(KN02_SLOT_BASE + KN02_ERRADDR);
- kn0x_chksyn = (void *)(KN02_SLOT_BASE + KN02_CHKSYN);
+ volatile u32 *csr = (void *)CKSEG1ADDR(KN02_SLOT_BASE + KN02_CSR);
- spin_lock_irqsave(&kn02_lock, flags);
+ kn0x_erraddr = (void *)CKSEG1ADDR(KN02_SLOT_BASE + KN02_ERRADDR);
+ kn0x_chksyn = (void *)CKSEG1ADDR(KN02_SLOT_BASE + KN02_CHKSYN);
/* Preset write-only bits of the Control Register cache. */
- cached_kn02_csr = *csr | KN03_CSR_LEDS;
+ cached_kn02_csr = *csr | KN02_CSR_LEDS;
/* Set normal ECC detection and generation. */
cached_kn02_csr &= ~(KN02_CSR_DIAGCHK | KN02_CSR_DIAGGEN);
@@ -242,18 +242,16 @@ static inline void dec_kn02_be_init(void)
cached_kn02_csr |= KN02_CSR_CORRECT;
*csr = cached_kn02_csr;
iob();
-
- spin_unlock_irqrestore(&kn02_lock, flags);
}
static inline void dec_kn03_be_init(void)
{
- volatile u32 *mcr = (void *)(KN03_SLOT_BASE + IOASIC_MCR);
- volatile u32 *mbcs = (void *)(KN03_SLOT_BASE + KN05_MB_CSR);
+ volatile u32 *mcr = (void *)CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_MCR);
+ volatile u32 *mbcs = (void *)CKSEG1ADDR(KN4K_SLOT_BASE + KN4K_MB_CSR);
+
+ kn0x_erraddr = (void *)CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_ERRADDR);
+ kn0x_chksyn = (void *)CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_CHKSYN);
- kn0x_erraddr = (void *)(KN03_SLOT_BASE + IOASIC_ERRADDR);
- kn0x_chksyn = (void *)(KN03_SLOT_BASE + IOASIC_CHKSYN);
-
/*
* Set normal ECC detection and generation, enable ECC correction.
* For KN05 we also need to make sure EE (?) is enabled in the MB.
@@ -263,8 +261,8 @@ static inline void dec_kn03_be_init(void)
*/
*mcr = (*mcr & ~(KN03_MCR_DIAGCHK | KN03_MCR_DIAGGEN)) |
KN03_MCR_CORRECT;
- if (current_cpu_data.cputype == CPU_R4400SC)
- *mbcs |= KN05_MB_CSR_EE;
+ if (current_cpu_type() == CPU_R4400SC)
+ *mbcs |= KN4K_MB_CSR_EE;
fast_iob();
}
diff --git a/arch/mips/dec/int-handler.S b/arch/mips/dec/int-handler.S
index 3b379099321..41a2fa1fa12 100644
--- a/arch/mips/dec/int-handler.S
+++ b/arch/mips/dec/int-handler.S
@@ -1,10 +1,8 @@
/*
- * arch/mips/dec/int-handler.S
- *
* Copyright (C) 1995, 1996, 1997 Paul M. Antoine and Harald Koerfgen
- * Copyright (C) 2000, 2001, 2002, 2003 Maciej W. Rozycki
+ * Copyright (C) 2000, 2001, 2002, 2003, 2005 Maciej W. Rozycki
*
- * Written by Ralf Baechle and Andreas Busse, modified for DECStation
+ * Written by Ralf Baechle and Andreas Busse, modified for DECstation
* support by Paul Antoine and Harald Koerfgen.
*
* completly rewritten:
@@ -13,12 +11,12 @@
* Rewritten extensively for controller-driven IRQ support
* by Maciej W. Rozycki.
*/
-#include <linux/config.h>
+
+#include <asm/addrspace.h>
#include <asm/asm.h>
-#include <asm/regdef.h>
#include <asm/mipsregs.h>
+#include <asm/regdef.h>
#include <asm/stackframe.h>
-#include <asm/addrspace.h>
#include <asm/dec/interrupts.h>
#include <asm/dec/ioasic_addrs.h>
@@ -28,11 +26,14 @@
#include <asm/dec/kn02xa.h>
#include <asm/dec/kn03.h>
+#define KN02_CSR_BASE CKSEG1ADDR(KN02_SLOT_BASE + KN02_CSR)
+#define KN02XA_IOASIC_BASE CKSEG1ADDR(KN02XA_SLOT_BASE + IOASIC_IOCTL)
+#define KN03_IOASIC_BASE CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_IOCTL)
.text
.set noreorder
/*
- * decstation_handle_int: Interrupt handler for DECStations
+ * plat_irq_dispatch: Interrupt handler for DECstations
*
* We follow the model in the Indy interrupt code by David Miller, where he
* says: a lot of complication here is taken away because:
@@ -48,84 +49,80 @@
* 3) Linux only thinks in terms of all IRQs on or all IRQs
* off, nothing in between like BSD spl() brain-damage.
*
- * Furthermore, the IRQs on the DECStations look basically (barring
+ * Furthermore, the IRQs on the DECstations look basically (barring
* software IRQs which we don't use at all) like...
*
* DS2100/3100's, aka kn01, aka Pmax:
*
* MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 SCSI
- * 3 Lance Ethernet
- * 4 DZ11 serial
- * 5 RTC
- * 6 Memory Controller
- * 7 FPU
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 SCSI
+ * 3 Lance Ethernet
+ * 4 DZ11 serial
+ * 5 RTC
+ * 6 Memory Controller & Video
+ * 7 FPU
*
* DS5000/200, aka kn02, aka 3max:
*
* MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 TurboChannel
- * 3 RTC
- * 4 Reserved
- * 5 Memory Controller
- * 6 Reserved
- * 7 FPU
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 TurboChannel
+ * 3 RTC
+ * 4 Reserved
+ * 5 Memory Controller
+ * 6 Reserved
+ * 7 FPU
*
* DS5000/1xx's, aka kn02ba, aka 3min:
*
* MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 TurboChannel Slot 0
- * 3 TurboChannel Slot 1
- * 4 TurboChannel Slot 2
- * 5 TurboChannel Slot 3 (ASIC)
- * 6 Halt button
- * 7 FPU/R4k timer
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 TurboChannel Slot 0
+ * 3 TurboChannel Slot 1
+ * 4 TurboChannel Slot 2
+ * 5 TurboChannel Slot 3 (ASIC)
+ * 6 Halt button
+ * 7 FPU/R4k timer
*
* DS5000/2x's, aka kn02ca, aka maxine:
*
* MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 Periodic Interrupt (100usec)
- * 3 RTC
- * 4 I/O write timeout
- * 5 TurboChannel (ASIC)
- * 6 Halt Keycode from Access.Bus keyboard (CTRL-ALT-ENTER)
- * 7 FPU/R4k timer
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 Periodic Interrupt (100usec)
+ * 3 RTC
+ * 4 I/O write timeout
+ * 5 TurboChannel (ASIC)
+ * 6 Halt Keycode from Access.Bus keyboard (CTRL-ALT-ENTER)
+ * 7 FPU/R4k timer
*
* DS5000/2xx's, aka kn03, aka 3maxplus:
*
* MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 System Board (ASIC)
- * 3 RTC
- * 4 Reserved
- * 5 Memory
- * 6 Halt Button
- * 7 FPU/R4k timer
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 System Board (ASIC)
+ * 3 RTC
+ * 4 Reserved
+ * 5 Memory
+ * 6 Halt Button
+ * 7 FPU/R4k timer
*
* We handle the IRQ according to _our_ priority (see setup.c),
* then we just return. If multiple IRQs are pending then we will
* just take another exception, big deal.
*/
.align 5
- NESTED(decstation_handle_int, PT_SIZE, ra)
- .set noat
- SAVE_ALL
- CLI # TEST: interrupts should be off
- .set at
+ NESTED(plat_irq_dispatch, PT_SIZE, ra)
.set noreorder
/*
@@ -133,7 +130,7 @@
*/
mfc0 t0,CP0_CAUSE # get pending interrupts
mfc0 t1,CP0_STATUS
-#ifdef CONFIG_MIPS32
+#ifdef CONFIG_32BIT
lw t2,cpu_fpu_mask
#endif
andi t0,ST0_IM # CAUSE.CE may be non-zero!
@@ -141,7 +138,7 @@
beqz t0,spurious
-#ifdef CONFIG_MIPS32
+#ifdef CONFIG_32BIT
and t2,t0
bnez t2,fpu # handle FPU immediately
#endif
@@ -265,13 +262,10 @@
srlv t3,t1,t2
handle_it:
- jal do_IRQ
- move a1,sp
-
- j ret_from_irq
+ j dec_irq_dispatch
nop
-#ifdef CONFIG_MIPS32
+#ifdef CONFIG_32BIT
fpu:
j handle_fpe_int
nop
@@ -280,7 +274,7 @@ fpu:
spurious:
j spurious_interrupt
nop
- END(decstation_handle_int)
+ END(plat_irq_dispatch)
/*
* Generic unimplemented interrupt routines -- cpu_mask_nr_tbl
diff --git a/arch/mips/dec/ioasic-irq.c b/arch/mips/dec/ioasic-irq.c
index d5bca5d233b..e04d973ce5a 100644
--- a/arch/mips/dec/ioasic-irq.c
+++ b/arch/mips/dec/ioasic-irq.c
@@ -1,9 +1,7 @@
/*
- * linux/arch/mips/dec/ioasic-irq.c
- *
* DEC I/O ASIC interrupts.
*
- * Copyright (c) 2002, 2003 Maciej W. Rozycki
+ * Copyright (c) 2002, 2003, 2013 Maciej W. Rozycki
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -13,124 +11,90 @@
#include <linux/init.h>
#include <linux/irq.h>
-#include <linux/spinlock.h>
#include <linux/types.h>
#include <asm/dec/ioasic.h>
#include <asm/dec/ioasic_addrs.h>
#include <asm/dec/ioasic_ints.h>
-
-static DEFINE_SPINLOCK(ioasic_lock);
-
static int ioasic_irq_base;
-
-static inline void unmask_ioasic_irq(unsigned int irq)
+static void unmask_ioasic_irq(struct irq_data *d)
{
u32 simr;
simr = ioasic_read(IO_REG_SIMR);
- simr |= (1 << (irq - ioasic_irq_base));
+ simr |= (1 << (d->irq - ioasic_irq_base));
ioasic_write(IO_REG_SIMR, simr);
}
-static inline void mask_ioasic_irq(unsigned int irq)
+static void mask_ioasic_irq(struct irq_data *d)
{
u32 simr;
simr = ioasic_read(IO_REG_SIMR);
- simr &= ~(1 << (irq - ioasic_irq_base));
+ simr &= ~(1 << (d->irq - ioasic_irq_base));
ioasic_write(IO_REG_SIMR, simr);
}
-static inline void clear_ioasic_irq(unsigned int irq)
-{
- u32 sir;
-
- sir = ~(1 << (irq - ioasic_irq_base));
- ioasic_write(IO_REG_SIR, sir);
-}
-
-static inline void enable_ioasic_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ioasic_lock, flags);
- unmask_ioasic_irq(irq);
- spin_unlock_irqrestore(&ioasic_lock, flags);
-}
-
-static inline void disable_ioasic_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ioasic_lock, flags);
- mask_ioasic_irq(irq);
- spin_unlock_irqrestore(&ioasic_lock, flags);
-}
-
-
-static inline unsigned int startup_ioasic_irq(unsigned int irq)
-{
- enable_ioasic_irq(irq);
- return 0;
-}
-
-#define shutdown_ioasic_irq disable_ioasic_irq
-
-static inline void ack_ioasic_irq(unsigned int irq)
+static void ack_ioasic_irq(struct irq_data *d)
{
- spin_lock(&ioasic_lock);
- mask_ioasic_irq(irq);
- spin_unlock(&ioasic_lock);
+ mask_ioasic_irq(d);
fast_iob();
}
-static inline void end_ioasic_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- enable_ioasic_irq(irq);
-}
-
-static struct hw_interrupt_type ioasic_irq_type = {
- .typename = "IO-ASIC",
- .startup = startup_ioasic_irq,
- .shutdown = shutdown_ioasic_irq,
- .enable = enable_ioasic_irq,
- .disable = disable_ioasic_irq,
- .ack = ack_ioasic_irq,
- .end = end_ioasic_irq,
+static struct irq_chip ioasic_irq_type = {
+ .name = "IO-ASIC",
+ .irq_ack = ack_ioasic_irq,
+ .irq_mask = mask_ioasic_irq,
+ .irq_mask_ack = ack_ioasic_irq,
+ .irq_unmask = unmask_ioasic_irq,
};
-
-#define startup_ioasic_dma_irq startup_ioasic_irq
-
-#define shutdown_ioasic_dma_irq shutdown_ioasic_irq
-
-#define enable_ioasic_dma_irq enable_ioasic_irq
-
-#define disable_ioasic_dma_irq disable_ioasic_irq
-
-#define ack_ioasic_dma_irq ack_ioasic_irq
-
-static inline void end_ioasic_dma_irq(unsigned int irq)
+static void clear_ioasic_dma_irq(struct irq_data *d)
{
- clear_ioasic_irq(irq);
+ u32 sir;
+
+ sir = ~(1 << (d->irq - ioasic_irq_base));
+ ioasic_write(IO_REG_SIR, sir);
fast_iob();
- end_ioasic_irq(irq);
}
-static struct hw_interrupt_type ioasic_dma_irq_type = {
- .typename = "IO-ASIC-DMA",
- .startup = startup_ioasic_dma_irq,
- .shutdown = shutdown_ioasic_dma_irq,
- .enable = enable_ioasic_dma_irq,
- .disable = disable_ioasic_dma_irq,
- .ack = ack_ioasic_dma_irq,
- .end = end_ioasic_dma_irq,
+static struct irq_chip ioasic_dma_irq_type = {
+ .name = "IO-ASIC-DMA",
+ .irq_ack = clear_ioasic_dma_irq,
+ .irq_mask = mask_ioasic_irq,
+ .irq_unmask = unmask_ioasic_irq,
+ .irq_eoi = clear_ioasic_dma_irq,
};
+/*
+ * I/O ASIC implements two kinds of DMA interrupts, informational and
+ * error interrupts.
+ *
+ * The formers do not stop DMA and should be cleared as soon as possible
+ * so that if they retrigger before the handler has completed, usually as
+ * a side effect of actions taken by the handler, then they are reissued.
+ * These use the `handle_edge_irq' handler that clears the request right
+ * away.
+ *
+ * The latters stop DMA and do not resume it until the interrupt has been
+ * cleared. This cannot be done until after a corrective action has been
+ * taken and this also means they will not retrigger. Therefore they use
+ * the `handle_fasteoi_irq' handler that only clears the request on the
+ * way out. Because MIPS processor interrupt inputs, one of which the I/O
+ * ASIC is cascaded to, are level-triggered it is recommended that error
+ * DMA interrupt action handlers are registered with the IRQF_ONESHOT flag
+ * set so that they are run with the interrupt line masked.
+ *
+ * This mask has `1' bits in the positions of informational interrupts.
+ */
+#define IO_IRQ_DMA_INFO \
+ (IO_IRQ_MASK(IO_INR_SCC0A_RXDMA) | \
+ IO_IRQ_MASK(IO_INR_SCC1A_RXDMA) | \
+ IO_IRQ_MASK(IO_INR_ISDN_TXDMA) | \
+ IO_IRQ_MASK(IO_INR_ISDN_RXDMA) | \
+ IO_IRQ_MASK(IO_INR_ASC_DMA))
void __init init_ioasic_irqs(int base)
{
@@ -140,18 +104,13 @@ void __init init_ioasic_irqs(int base)
ioasic_write(IO_REG_SIMR, 0);
fast_iob();
- for (i = base; i < base + IO_INR_DMA; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- irq_desc[i].handler = &ioasic_irq_type;
- }
- for (; i < base + IO_IRQ_LINES; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- irq_desc[i].handler = &ioasic_dma_irq_type;
- }
+ for (i = base; i < base + IO_INR_DMA; i++)
+ irq_set_chip_and_handler(i, &ioasic_irq_type,
+ handle_level_irq);
+ for (; i < base + IO_IRQ_LINES; i++)
+ irq_set_chip_and_handler(i, &ioasic_dma_irq_type,
+ 1 << (i - base) & IO_IRQ_DMA_INFO ?
+ handle_edge_irq : handle_fasteoi_irq);
ioasic_irq_base = base;
}
diff --git a/arch/mips/dec/kn01-berr.c b/arch/mips/dec/kn01-berr.c
new file mode 100644
index 00000000000..44d8a87a8a6
--- /dev/null
+++ b/arch/mips/dec/kn01-berr.c
@@ -0,0 +1,200 @@
+/*
+ * Bus error event handling code for DECstation/DECsystem 3100
+ * and 2100 (KN01) systems equipped with parity error detection
+ * logic.
+ *
+ * Copyright (c) 2005 Maciej W. Rozycki
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <asm/inst.h>
+#include <asm/irq_regs.h>
+#include <asm/mipsregs.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+#include <asm/uaccess.h>
+
+#include <asm/dec/kn01.h>
+
+
+/* CP0 hazard avoidance. */
+#define BARRIER \
+ __asm__ __volatile__( \
+ ".set push\n\t" \
+ ".set noreorder\n\t" \
+ "nop\n\t" \
+ ".set pop\n\t")
+
+/*
+ * Bits 7:0 of the Control Register are write-only -- the
+ * corresponding bits of the Status Register have a different
+ * meaning. Hence we use a cache. It speeds up things a bit
+ * as well.
+ *
+ * There is no default value -- it has to be initialized.
+ */
+u16 cached_kn01_csr;
+static DEFINE_RAW_SPINLOCK(kn01_lock);
+
+
+static inline void dec_kn01_be_ack(void)
+{
+ volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&kn01_lock, flags);
+
+ *csr = cached_kn01_csr | KN01_CSR_MEMERR; /* Clear bus IRQ. */
+ iob();
+
+ raw_spin_unlock_irqrestore(&kn01_lock, flags);
+}
+
+static int dec_kn01_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
+{
+ volatile u32 *kn01_erraddr = (void *)CKSEG1ADDR(KN01_SLOT_BASE +
+ KN01_ERRADDR);
+
+ static const char excstr[] = "exception";
+ static const char intstr[] = "interrupt";
+ static const char cpustr[] = "CPU";
+ static const char mreadstr[] = "memory read";
+ static const char readstr[] = "read";
+ static const char writestr[] = "write";
+ static const char timestr[] = "timeout";
+ static const char paritystr[] = "parity error";
+
+ int data = regs->cp0_cause & 4;
+ unsigned int __user *pc = (unsigned int __user *)regs->cp0_epc +
+ ((regs->cp0_cause & CAUSEF_BD) != 0);
+ union mips_instruction insn;
+ unsigned long entrylo, offset;
+ long asid, entryhi, vaddr;
+
+ const char *kind, *agent, *cycle, *event;
+ unsigned long address;
+
+ u32 erraddr = *kn01_erraddr;
+ int action = MIPS_BE_FATAL;
+
+ /* Ack ASAP, so that any subsequent errors get caught. */
+ dec_kn01_be_ack();
+
+ kind = invoker ? intstr : excstr;
+
+ agent = cpustr;
+
+ if (invoker)
+ address = erraddr;
+ else {
+ /* Bloody hardware doesn't record the address for reads... */
+ if (data) {
+ /* This never faults. */
+ __get_user(insn.word, pc);
+ vaddr = regs->regs[insn.i_format.rs] +
+ insn.i_format.simmediate;
+ } else
+ vaddr = (long)pc;
+ if (KSEGX(vaddr) == CKSEG0 || KSEGX(vaddr) == CKSEG1)
+ address = CPHYSADDR(vaddr);
+ else {
+ /* Peek at what physical address the CPU used. */
+ asid = read_c0_entryhi();
+ entryhi = asid & (PAGE_SIZE - 1);
+ entryhi |= vaddr & ~(PAGE_SIZE - 1);
+ write_c0_entryhi(entryhi);
+ BARRIER;
+ tlb_probe();
+ /* No need to check for presence. */
+ tlb_read();
+ entrylo = read_c0_entrylo0();
+ write_c0_entryhi(asid);
+ offset = vaddr & (PAGE_SIZE - 1);
+ address = (entrylo & ~(PAGE_SIZE - 1)) | offset;
+ }
+ }
+
+ /* Treat low 256MB as memory, high -- as I/O. */
+ if (address < 0x10000000) {
+ cycle = mreadstr;
+ event = paritystr;
+ } else {
+ cycle = invoker ? writestr : readstr;
+ event = timestr;
+ }
+
+ if (is_fixup)
+ action = MIPS_BE_FIXUP;
+
+ if (action != MIPS_BE_FIXUP)
+ printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n",
+ kind, agent, cycle, event, address);
+
+ return action;
+}
+
+int dec_kn01_be_handler(struct pt_regs *regs, int is_fixup)
+{
+ return dec_kn01_be_backend(regs, is_fixup, 0);
+}
+
+irqreturn_t dec_kn01_be_interrupt(int irq, void *dev_id)
+{
+ volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR);
+ struct pt_regs *regs = get_irq_regs();
+ int action;
+
+ if (!(*csr & KN01_CSR_MEMERR))
+ return IRQ_NONE; /* Must have been video. */
+
+ action = dec_kn01_be_backend(regs, 0, 1);
+
+ if (action == MIPS_BE_DISCARD)
+ return IRQ_HANDLED;
+
+ /*
+ * FIXME: Find the affected processes and kill them, otherwise
+ * we must die.
+ *
+ * The interrupt is asynchronously delivered thus EPC and RA
+ * may be irrelevant, but are printed for a reference.
+ */
+ printk(KERN_ALERT "Fatal bus interrupt, epc == %08lx, ra == %08lx\n",
+ regs->cp0_epc, regs->regs[31]);
+ die("Unrecoverable bus error", regs);
+}
+
+
+void __init dec_kn01_be_init(void)
+{
+ volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&kn01_lock, flags);
+
+ /* Preset write-only bits of the Control Register cache. */
+ cached_kn01_csr = *csr;
+ cached_kn01_csr &= KN01_CSR_STATUS | KN01_CSR_PARDIS | KN01_CSR_TXDIS;
+ cached_kn01_csr |= KN01_CSR_LEDS;
+
+ /* Enable parity error detection. */
+ cached_kn01_csr &= ~KN01_CSR_PARDIS;
+ *csr = cached_kn01_csr;
+ iob();
+
+ raw_spin_unlock_irqrestore(&kn01_lock, flags);
+
+ /* Clear any leftover errors from the firmware. */
+ dec_kn01_be_ack();
+}
diff --git a/arch/mips/dec/kn02-irq.c b/arch/mips/dec/kn02-irq.c
index e0bfcd1521e..37199f742c4 100644
--- a/arch/mips/dec/kn02-irq.c
+++ b/arch/mips/dec/kn02-irq.c
@@ -1,10 +1,8 @@
/*
- * linux/arch/mips/dec/kn02-irq.c
- *
* DECstation 5000/200 (KN02) Control and Status Register
* interrupts.
*
- * Copyright (c) 2002, 2003 Maciej W. Rozycki
+ * Copyright (c) 2002, 2003, 2005 Maciej W. Rozycki
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -14,7 +12,6 @@
#include <linux/init.h>
#include <linux/irq.h>
-#include <linux/spinlock.h>
#include <linux/types.h>
#include <asm/dec/kn02.h>
@@ -29,99 +26,54 @@
* There is no default value -- it has to be initialized.
*/
u32 cached_kn02_csr;
-DEFINE_SPINLOCK(kn02_lock);
-
static int kn02_irq_base;
-
-static inline void unmask_kn02_irq(unsigned int irq)
+static void unmask_kn02_irq(struct irq_data *d)
{
- volatile u32 *csr = (volatile u32 *)KN02_CSR_BASE;
+ volatile u32 *csr = (volatile u32 *)CKSEG1ADDR(KN02_SLOT_BASE +
+ KN02_CSR);
- cached_kn02_csr |= (1 << (irq - kn02_irq_base + 16));
+ cached_kn02_csr |= (1 << (d->irq - kn02_irq_base + 16));
*csr = cached_kn02_csr;
}
-static inline void mask_kn02_irq(unsigned int irq)
+static void mask_kn02_irq(struct irq_data *d)
{
- volatile u32 *csr = (volatile u32 *)KN02_CSR_BASE;
+ volatile u32 *csr = (volatile u32 *)CKSEG1ADDR(KN02_SLOT_BASE +
+ KN02_CSR);
- cached_kn02_csr &= ~(1 << (irq - kn02_irq_base + 16));
+ cached_kn02_csr &= ~(1 << (d->irq - kn02_irq_base + 16));
*csr = cached_kn02_csr;
}
-static inline void enable_kn02_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&kn02_lock, flags);
- unmask_kn02_irq(irq);
- spin_unlock_irqrestore(&kn02_lock, flags);
-}
-
-static inline void disable_kn02_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&kn02_lock, flags);
- mask_kn02_irq(irq);
- spin_unlock_irqrestore(&kn02_lock, flags);
-}
-
-
-static unsigned int startup_kn02_irq(unsigned int irq)
-{
- enable_kn02_irq(irq);
- return 0;
-}
-
-#define shutdown_kn02_irq disable_kn02_irq
-
-static void ack_kn02_irq(unsigned int irq)
+static void ack_kn02_irq(struct irq_data *d)
{
- spin_lock(&kn02_lock);
- mask_kn02_irq(irq);
- spin_unlock(&kn02_lock);
+ mask_kn02_irq(d);
iob();
}
-static void end_kn02_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- enable_kn02_irq(irq);
-}
-
-static struct hw_interrupt_type kn02_irq_type = {
- .typename = "KN02-CSR",
- .startup = startup_kn02_irq,
- .shutdown = shutdown_kn02_irq,
- .enable = enable_kn02_irq,
- .disable = disable_kn02_irq,
- .ack = ack_kn02_irq,
- .end = end_kn02_irq,
+static struct irq_chip kn02_irq_type = {
+ .name = "KN02-CSR",
+ .irq_ack = ack_kn02_irq,
+ .irq_mask = mask_kn02_irq,
+ .irq_mask_ack = ack_kn02_irq,
+ .irq_unmask = unmask_kn02_irq,
};
-
void __init init_kn02_irqs(int base)
{
- volatile u32 *csr = (volatile u32 *)KN02_CSR_BASE;
- unsigned long flags;
+ volatile u32 *csr = (volatile u32 *)CKSEG1ADDR(KN02_SLOT_BASE +
+ KN02_CSR);
int i;
/* Mask interrupts. */
- spin_lock_irqsave(&kn02_lock, flags);
- cached_kn02_csr &= ~KN03_CSR_IOINTEN;
+ cached_kn02_csr &= ~KN02_CSR_IOINTEN;
*csr = cached_kn02_csr;
iob();
- spin_unlock_irqrestore(&kn02_lock, flags);
- for (i = base; i < base + KN02_IRQ_LINES; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- irq_desc[i].handler = &kn02_irq_type;
- }
+ for (i = base; i < base + KN02_IRQ_LINES; i++)
+ irq_set_chip_and_handler(i, &kn02_irq_type, handle_level_irq);
kn02_irq_base = base;
}
diff --git a/arch/mips/dec/kn02xa-berr.c b/arch/mips/dec/kn02xa-berr.c
new file mode 100644
index 00000000000..ec606363b80
--- /dev/null
+++ b/arch/mips/dec/kn02xa-berr.c
@@ -0,0 +1,139 @@
+/*
+ * Bus error event handling code for 5000-series systems equipped
+ * with parity error detection logic, i.e. DECstation/DECsystem
+ * 5000/120, /125, /133 (KN02-BA), 5000/150 (KN04-BA) and Personal
+ * DECstation/DECsystem 5000/20, /25, /33 (KN02-CA), 5000/50
+ * (KN04-CA) systems.
+ *
+ * Copyright (c) 2005 Maciej W. Rozycki
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/addrspace.h>
+#include <asm/cpu-type.h>
+#include <asm/irq_regs.h>
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+
+#include <asm/dec/kn02ca.h>
+#include <asm/dec/kn02xa.h>
+#include <asm/dec/kn05.h>
+
+static inline void dec_kn02xa_be_ack(void)
+{
+ volatile u32 *mer = (void *)CKSEG1ADDR(KN02XA_MER);
+ volatile u32 *mem_intr = (void *)CKSEG1ADDR(KN02XA_MEM_INTR);
+
+ *mer = KN02CA_MER_INTR; /* Clear errors; keep the ARC IRQ. */
+ *mem_intr = 0; /* Any write clears the bus IRQ. */
+ iob();
+}
+
+static int dec_kn02xa_be_backend(struct pt_regs *regs, int is_fixup,
+ int invoker)
+{
+ volatile u32 *kn02xa_mer = (void *)CKSEG1ADDR(KN02XA_MER);
+ volatile u32 *kn02xa_ear = (void *)CKSEG1ADDR(KN02XA_EAR);
+
+ static const char excstr[] = "exception";
+ static const char intstr[] = "interrupt";
+ static const char cpustr[] = "CPU";
+ static const char mreadstr[] = "memory read";
+ static const char readstr[] = "read";
+ static const char writestr[] = "write";
+ static const char timestr[] = "timeout";
+ static const char paritystr[] = "parity error";
+ static const char lanestat[][4] = { " OK", "BAD" };
+
+ const char *kind, *agent, *cycle, *event;
+ unsigned long address;
+
+ u32 mer = *kn02xa_mer;
+ u32 ear = *kn02xa_ear;
+ int action = MIPS_BE_FATAL;
+
+ /* Ack ASAP, so that any subsequent errors get caught. */
+ dec_kn02xa_be_ack();
+
+ kind = invoker ? intstr : excstr;
+
+ /* No DMA errors? */
+ agent = cpustr;
+
+ address = ear & KN02XA_EAR_ADDRESS;
+
+ /* Low 256MB is decoded as memory, high -- as TC. */
+ if (address < 0x10000000) {
+ cycle = mreadstr;
+ event = paritystr;
+ } else {
+ cycle = invoker ? writestr : readstr;
+ event = timestr;
+ }
+
+ if (is_fixup)
+ action = MIPS_BE_FIXUP;
+
+ if (action != MIPS_BE_FIXUP)
+ printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n",
+ kind, agent, cycle, event, address);
+
+ if (action != MIPS_BE_FIXUP && address < 0x10000000)
+ printk(KERN_ALERT " Byte lane status %#3x -- "
+ "#3: %s, #2: %s, #1: %s, #0: %s\n",
+ (mer & KN02XA_MER_BYTERR) >> 8,
+ lanestat[(mer & KN02XA_MER_BYTERR_3) != 0],
+ lanestat[(mer & KN02XA_MER_BYTERR_2) != 0],
+ lanestat[(mer & KN02XA_MER_BYTERR_1) != 0],
+ lanestat[(mer & KN02XA_MER_BYTERR_0) != 0]);
+
+ return action;
+}
+
+int dec_kn02xa_be_handler(struct pt_regs *regs, int is_fixup)
+{
+ return dec_kn02xa_be_backend(regs, is_fixup, 0);
+}
+
+irqreturn_t dec_kn02xa_be_interrupt(int irq, void *dev_id)
+{
+ struct pt_regs *regs = get_irq_regs();
+ int action = dec_kn02xa_be_backend(regs, 0, 1);
+
+ if (action == MIPS_BE_DISCARD)
+ return IRQ_HANDLED;
+
+ /*
+ * FIXME: Find the affected processes and kill them, otherwise
+ * we must die.
+ *
+ * The interrupt is asynchronously delivered thus EPC and RA
+ * may be irrelevant, but are printed for a reference.
+ */
+ printk(KERN_ALERT "Fatal bus interrupt, epc == %08lx, ra == %08lx\n",
+ regs->cp0_epc, regs->regs[31]);
+ die("Unrecoverable bus error", regs);
+}
+
+
+void __init dec_kn02xa_be_init(void)
+{
+ volatile u32 *mbcs = (void *)CKSEG1ADDR(KN4K_SLOT_BASE + KN4K_MB_CSR);
+
+ /* For KN04 we need to make sure EE (?) is enabled in the MB. */
+ if (current_cpu_type() == CPU_R4000SC)
+ *mbcs |= KN4K_MB_CSR_EE;
+ fast_iob();
+
+ /* Clear any leftover errors from the firmware. */
+ dec_kn02xa_be_ack();
+}
diff --git a/arch/mips/dec/platform.c b/arch/mips/dec/platform.c
new file mode 100644
index 00000000000..c7ac86af847
--- /dev/null
+++ b/arch/mips/dec/platform.c
@@ -0,0 +1,44 @@
+/*
+ * DEC platform devices.
+ *
+ * Copyright (c) 2014 Maciej W. Rozycki
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/mc146818rtc.h>
+#include <linux/platform_device.h>
+
+static struct resource dec_rtc_resources[] = {
+ {
+ .name = "rtc",
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct cmos_rtc_board_info dec_rtc_info = {
+ .flags = CMOS_RTC_FLAGS_NOFREQ,
+ .address_space = 64,
+};
+
+static struct platform_device dec_rtc_device = {
+ .name = "rtc_cmos",
+ .id = PLATFORM_DEVID_NONE,
+ .dev.platform_data = &dec_rtc_info,
+ .resource = dec_rtc_resources,
+ .num_resources = ARRAY_SIZE(dec_rtc_resources),
+};
+
+static int __init dec_add_devices(void)
+{
+ dec_rtc_resources[0].start = RTC_PORT(0);
+ dec_rtc_resources[0].end = RTC_PORT(0) + dec_kn_slot_size - 1;
+ return platform_device_register(&dec_rtc_device);
+}
+
+device_initcall(dec_add_devices);
diff --git a/arch/mips/dec/prom/Makefile b/arch/mips/dec/prom/Makefile
index 373822ec2d8..ae73e42ac20 100644
--- a/arch/mips/dec/prom/Makefile
+++ b/arch/mips/dec/prom/Makefile
@@ -5,7 +5,4 @@
lib-y += init.o memory.o cmdline.o identify.o console.o
-lib-$(CONFIG_MIPS32) += locore.o
-lib-$(CONFIG_MIPS64) += call_o32.o
-
-EXTRA_AFLAGS := $(CFLAGS)
+lib-$(CONFIG_32BIT) += locore.o
diff --git a/arch/mips/dec/prom/call_o32.S b/arch/mips/dec/prom/call_o32.S
deleted file mode 100644
index 0dd56db9b3d..00000000000
--- a/arch/mips/dec/prom/call_o32.S
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * arch/mips/dec/call_o32.S
- *
- * O32 interface for the 64 (or N32) ABI.
- *
- * Copyright (C) 2002 Maciej W. Rozycki
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <asm/asm.h>
-#include <asm/regdef.h>
-
-/* Maximum number of arguments supported. Must be even! */
-#define O32_ARGC 32
-/* Number of static registers we save. */
-#define O32_STATC 11
-/* Frame size for both of the above. */
-#define O32_FRAMESZ (4 * O32_ARGC + SZREG * O32_STATC)
-
- .text
-
-/*
- * O32 function call dispatcher, for interfacing 32-bit ROM routines.
- *
- * The standard 64 (N32) calling sequence is supported, with a0
- * holding a function pointer, a1-a7 -- its first seven arguments
- * and the stack -- remaining ones (up to O32_ARGC, including a1-a7).
- * Static registers, gp and fp are preserved, v0 holds a result.
- * This code relies on the called o32 function for sp and ra
- * restoration and thus both this dispatcher and the current stack
- * have to be placed in a KSEGx (or KUSEG) address space. Any
- * pointers passed have to point to addresses within one of these
- * spaces as well.
- */
-NESTED(call_o32, O32_FRAMESZ, ra)
- REG_SUBU sp,O32_FRAMESZ
-
- REG_S ra,O32_FRAMESZ-1*SZREG(sp)
- REG_S fp,O32_FRAMESZ-2*SZREG(sp)
- REG_S gp,O32_FRAMESZ-3*SZREG(sp)
- REG_S s7,O32_FRAMESZ-4*SZREG(sp)
- REG_S s6,O32_FRAMESZ-5*SZREG(sp)
- REG_S s5,O32_FRAMESZ-6*SZREG(sp)
- REG_S s4,O32_FRAMESZ-7*SZREG(sp)
- REG_S s3,O32_FRAMESZ-8*SZREG(sp)
- REG_S s2,O32_FRAMESZ-9*SZREG(sp)
- REG_S s1,O32_FRAMESZ-10*SZREG(sp)
- REG_S s0,O32_FRAMESZ-11*SZREG(sp)
-
- move jp,a0
-
- sll a0,a1,zero
- sll a1,a2,zero
- sll a2,a3,zero
- sll a3,a4,zero
- sw a5,0x10(sp)
- sw a6,0x14(sp)
- sw a7,0x18(sp)
-
- PTR_LA t0,O32_FRAMESZ(sp)
- PTR_LA t1,0x1c(sp)
- li t2,O32_ARGC-7
-1:
- lw t3,(t0)
- REG_ADDU t0,SZREG
- sw t3,(t1)
- REG_SUBU t2,1
- REG_ADDU t1,4
- bnez t2,1b
-
- jalr jp
-
- REG_L s0,O32_FRAMESZ-11*SZREG(sp)
- REG_L s1,O32_FRAMESZ-10*SZREG(sp)
- REG_L s2,O32_FRAMESZ-9*SZREG(sp)
- REG_L s3,O32_FRAMESZ-8*SZREG(sp)
- REG_L s4,O32_FRAMESZ-7*SZREG(sp)
- REG_L s5,O32_FRAMESZ-6*SZREG(sp)
- REG_L s6,O32_FRAMESZ-5*SZREG(sp)
- REG_L s7,O32_FRAMESZ-4*SZREG(sp)
- REG_L gp,O32_FRAMESZ-3*SZREG(sp)
- REG_L fp,O32_FRAMESZ-2*SZREG(sp)
- REG_L ra,O32_FRAMESZ-1*SZREG(sp)
-
- REG_ADDU sp,O32_FRAMESZ
- jr ra
-END(call_o32)
diff --git a/arch/mips/dec/prom/console.c b/arch/mips/dec/prom/console.c
index cade16ec7e5..caa6e047caf 100644
--- a/arch/mips/dec/prom/console.c
+++ b/arch/mips/dec/prom/console.c
@@ -1,9 +1,7 @@
/*
- * arch/mips/dec/prom/console.c
- *
* DECstation PROM-based early console support.
*
- * Copyright (C) 2004 Maciej W. Rozycki
+ * Copyright (C) 2004, 2007 Maciej W. Rozycki
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -13,43 +11,35 @@
#include <linux/console.h>
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/string.h>
#include <asm/dec/prom.h>
static void __init prom_console_write(struct console *con, const char *s,
unsigned int c)
{
- static char sfmt[] __initdata = "%%%us";
- char fmt[13];
-
- snprintf(fmt, sizeof(fmt), sfmt, c);
- prom_printf(fmt, s);
+ char buf[81];
+ unsigned int chunk = sizeof(buf) - 1;
+
+ while (c > 0) {
+ if (chunk > c)
+ chunk = c;
+ memcpy(buf, s, chunk);
+ buf[chunk] = '\0';
+ prom_printf("%s", buf);
+ s += chunk;
+ c -= chunk;
+ }
}
static struct console promcons __initdata = {
.name = "prom",
.write = prom_console_write,
- .flags = CON_PRINTBUFFER,
+ .flags = CON_BOOT | CON_PRINTBUFFER,
.index = -1,
};
-static int promcons_output __initdata = 0;
-
void __init register_prom_console(void)
{
- if (!promcons_output) {
- promcons_output = 1;
- register_console(&promcons);
- }
-}
-
-void __init unregister_prom_console(void)
-{
- if (promcons_output) {
- unregister_console(&promcons);
- promcons_output = 0;
- }
+ register_console(&promcons);
}
-
-void disable_early_printk(void)
- __attribute__((alias("unregister_prom_console")));
diff --git a/arch/mips/dec/prom/dectypes.h b/arch/mips/dec/prom/dectypes.h
index 707b6f1f5a9..69ea5b9c819 100644
--- a/arch/mips/dec/prom/dectypes.h
+++ b/arch/mips/dec/prom/dectypes.h
@@ -1,5 +1,5 @@
#ifndef DECTYPES
-#define DECTYPES
+#define DECTYPES
#define DS2100_3100 1 /* DS2100/3100 Pmax */
#define DS5000_200 2 /* DS5000/200 3max */
diff --git a/arch/mips/dec/prom/identify.c b/arch/mips/dec/prom/identify.c
index 9380588cb15..95e26f4bb38 100644
--- a/arch/mips/dec/prom/identify.c
+++ b/arch/mips/dec/prom/identify.c
@@ -2,7 +2,7 @@
* identify.c: machine identification code.
*
* Copyright (C) 1998 Harald Koerfgen and Paul M. Antoine
- * Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
+ * Copyright (C) 2002, 2003, 2004, 2005 Maciej W. Rozycki
*/
#include <linux/init.h>
#include <linux/kernel.h>
@@ -12,6 +12,7 @@
#include <linux/types.h>
#include <asm/bootinfo.h>
+
#include <asm/dec/ioasic.h>
#include <asm/dec/ioasic_addrs.h>
#include <asm/dec/kn01.h>
@@ -21,12 +22,10 @@
#include <asm/dec/kn03.h>
#include <asm/dec/kn230.h>
#include <asm/dec/prom.h>
+#include <asm/dec/system.h>
#include "dectypes.h"
-extern unsigned long mips_machgroup;
-extern unsigned long mips_machtype;
-
static const char *dec_system_strings[] = {
[MACH_DSUNKNOWN] "unknown DECstation",
[MACH_DS23100] "DECstation 2100/3100",
@@ -68,34 +67,47 @@ EXPORT_SYMBOL(dec_rtc_base);
static inline void prom_init_kn01(void)
{
- dec_rtc_base = (void *)KN01_RTC_BASE;
+ dec_kn_slot_base = KN01_SLOT_BASE;
dec_kn_slot_size = KN01_SLOT_SIZE;
+
+ dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC);
}
static inline void prom_init_kn230(void)
{
- dec_rtc_base = (void *)KN01_RTC_BASE;
+ dec_kn_slot_base = KN01_SLOT_BASE;
dec_kn_slot_size = KN01_SLOT_SIZE;
+
+ dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC);
}
static inline void prom_init_kn02(void)
{
- dec_rtc_base = (void *)KN02_RTC_BASE;
+ dec_kn_slot_base = KN02_SLOT_BASE;
dec_kn_slot_size = KN02_SLOT_SIZE;
+ dec_tc_bus = 1;
+
+ dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN02_RTC);
}
static inline void prom_init_kn02xa(void)
{
- ioasic_base = (void *)KN02XA_IOASIC_BASE;
- dec_rtc_base = (void *)KN02XA_RTC_BASE;
+ dec_kn_slot_base = KN02XA_SLOT_BASE;
dec_kn_slot_size = IOASIC_SLOT_SIZE;
+ dec_tc_bus = 1;
+
+ ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL);
+ dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY);
}
static inline void prom_init_kn03(void)
{
- ioasic_base = (void *)KN03_IOASIC_BASE;
- dec_rtc_base = (void *)KN03_RTC_BASE;
+ dec_kn_slot_base = KN03_SLOT_BASE;
dec_kn_slot_size = IOASIC_SLOT_SIZE;
+ dec_tc_bus = 1;
+
+ ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL);
+ dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY);
}
@@ -121,9 +133,6 @@ void __init prom_identify_arch(u32 magic)
dec_firmrev = (dec_sysid & 0xff00) >> 8;
dec_etc = dec_sysid & 0xff;
- /* We're obviously one of the DEC machines */
- mips_machgroup = MACH_GROUP_DEC;
-
/*
* FIXME: This may not be an exhaustive list of DECStations/Servers!
* Put all model-specific initialisation calls here.
diff --git a/arch/mips/dec/prom/init.c b/arch/mips/dec/prom/init.c
index 60f74256e68..4e1761e0a09 100644
--- a/arch/mips/dec/prom/init.c
+++ b/arch/mips/dec/prom/init.c
@@ -4,14 +4,16 @@
* Copyright (C) 1998 Harald Koerfgen
* Copyright (C) 2002, 2004 Maciej W. Rozycki
*/
-#include <linux/config.h>
#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/linkage.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/types.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
+#include <asm/cpu-type.h>
#include <asm/processor.h>
#include <asm/dec/prom.h>
@@ -88,14 +90,10 @@ void __init prom_init(void)
extern void dec_machine_halt(void);
static char cpu_msg[] __initdata =
"Sorry, this kernel is compiled for a wrong CPU type!\n";
- static char r3k_msg[] __initdata =
- "Please recompile with \"CONFIG_CPU_R3000 = y\".\n";
- static char r4k_msg[] __initdata =
- "Please recompile with \"CONFIG_CPU_R4x00 = y\".\n";
s32 argc = fw_arg0;
- s32 argv = fw_arg1;
+ s32 *argv = (void *)fw_arg1;
u32 magic = fw_arg2;
- s32 prom_vec = fw_arg3;
+ s32 *prom_vec = (void *)fw_arg3;
/*
* Determine which PROM we have
@@ -111,8 +109,10 @@ void __init prom_init(void)
/* Were we compiled with the right CPU option? */
#if defined(CONFIG_CPU_R3000)
- if ((current_cpu_data.cputype == CPU_R4000SC) ||
- (current_cpu_data.cputype == CPU_R4400SC)) {
+ if ((current_cpu_type() == CPU_R4000SC) ||
+ (current_cpu_type() == CPU_R4400SC)) {
+ static char r4k_msg[] __initdata =
+ "Please recompile with \"CONFIG_CPU_R4x00 = y\".\n";
printk(cpu_msg);
printk(r4k_msg);
dec_machine_halt();
@@ -120,8 +120,10 @@ void __init prom_init(void)
#endif
#if defined(CONFIG_CPU_R4X00)
- if ((current_cpu_data.cputype == CPU_R3000) ||
- (current_cpu_data.cputype == CPU_R3000A)) {
+ if ((current_cpu_type() == CPU_R3000) ||
+ (current_cpu_type() == CPU_R3000A)) {
+ static char r3k_msg[] __initdata =
+ "Please recompile with \"CONFIG_CPU_R3000 = y\".\n";
printk(cpu_msg);
printk(r3k_msg);
dec_machine_halt();
diff --git a/arch/mips/dec/prom/locore.S b/arch/mips/dec/prom/locore.S
index d9acdcefee8..f72b5741025 100644
--- a/arch/mips/dec/prom/locore.S
+++ b/arch/mips/dec/prom/locore.S
@@ -27,4 +27,3 @@ NESTED(genexcept_early, 0, sp)
jr k0
rfe
END(genexcept_early)
-
diff --git a/arch/mips/dec/prom/memory.c b/arch/mips/dec/prom/memory.c
index e4f6f26425e..8c62316f22f 100644
--- a/arch/mips/dec/prom/memory.c
+++ b/arch/mips/dec/prom/memory.c
@@ -4,7 +4,6 @@
* Copyright (C) 1998 Harald Koerfgen, Frieder Streffer and Paul M. Antoine
* Copyright (C) 2000, 2002 Maciej W. Rozycki
*/
-#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
@@ -19,7 +18,7 @@
#include <asm/sections.h>
-volatile unsigned long mem_err = 0; /* So we know an error occurred */
+volatile unsigned long mem_err; /* So we know an error occurred */
/*
* Probe memory in 4MB chunks, waiting for an error to tell us we've fallen
@@ -35,22 +34,22 @@ static inline void pmax_setup_memory_region(void)
extern char genexcept_early;
/* Install exception handler */
- memcpy(&old_handler, (void *)(KSEG0 + 0x80), 0x80);
- memcpy((void *)(KSEG0 + 0x80), &genexcept_early, 0x80);
+ memcpy(&old_handler, (void *)(CKSEG0 + 0x80), 0x80);
+ memcpy((void *)(CKSEG0 + 0x80), &genexcept_early, 0x80);
/* read unmapped and uncached (KSEG1)
* DECstations have at least 4MB RAM
* Assume less than 480MB of RAM, as this is max for 5000/2xx
* FIXME this should be replaced by the first free page!
*/
- for (memory_page = (unsigned char *) KSEG1 + CHUNK_SIZE;
- (mem_err== 0) && (memory_page < ((unsigned char *) KSEG1+0x1E000000));
- memory_page += CHUNK_SIZE) {
+ for (memory_page = (unsigned char *)CKSEG1 + CHUNK_SIZE;
+ mem_err == 0 && memory_page < (unsigned char *)CKSEG1 + 0x1e00000;
+ memory_page += CHUNK_SIZE) {
dummy = *memory_page;
}
- memcpy((void *)(KSEG0 + 0x80), &old_handler, 0x80);
+ memcpy((void *)(CKSEG0 + 0x80), &old_handler, 0x80);
- add_memory_region(0, (unsigned long)memory_page - KSEG1 - CHUNK_SIZE,
+ add_memory_region(0, (unsigned long)memory_page - CKSEG1 - CHUNK_SIZE,
BOOT_MEM_RAM);
}
@@ -65,7 +64,7 @@ static inline void rex_setup_memory_region(void)
memmap *bm;
/* some free 64k */
- bm = (memmap *)KSEG0ADDR(0x28000);
+ bm = (memmap *)CKSEG0ADDR(0x28000);
bitmap_size = rex_getbitmap(bm);
@@ -93,16 +92,16 @@ void __init prom_meminit(u32 magic)
rex_setup_memory_region();
}
-unsigned long __init prom_free_prom_memory(void)
+void __init prom_free_prom_memory(void)
{
- unsigned long addr, end;
+ unsigned long end;
/*
* Free everything below the kernel itself but leave
* the first page reserved for the exception handlers.
*/
-#if defined(CONFIG_DECLANCE) || defined(CONFIG_DECLANCE_MODULE)
+#if IS_ENABLED(CONFIG_DECLANCE)
/*
* Leave 128 KB reserved for Lance memory for
* IOASIC DECstations.
@@ -115,16 +114,5 @@ unsigned long __init prom_free_prom_memory(void)
#endif
end = __pa(&_text);
- addr = PAGE_SIZE;
- while (addr < end) {
- ClearPageReserved(virt_to_page(__va(addr)));
- set_page_count(virt_to_page(__va(addr)), 1);
- free_page((unsigned long)__va(addr));
- addr += PAGE_SIZE;
- }
-
- printk("Freeing unused PROM memory: %ldk freed\n",
- (end - PAGE_SIZE) >> 10);
-
- return end - PAGE_SIZE;
+ free_init_pages("unused PROM memory", PAGE_SIZE, end);
}
diff --git a/arch/mips/dec/promcon.c b/arch/mips/dec/promcon.c
deleted file mode 100644
index 9f0972f5a70..00000000000
--- a/arch/mips/dec/promcon.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Wrap-around code for a console using the
- * DECstation PROM io-routines.
- *
- * Copyright (c) 1998 Harald Koerfgen
- */
-
-#include <linux/tty.h>
-#include <linux/ptrace.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/fs.h>
-
-#include <asm/dec/prom.h>
-
-static void prom_console_write(struct console *co, const char *s,
- unsigned count)
-{
- unsigned i;
-
- /*
- * Now, do each character
- */
- for (i = 0; i < count; i++) {
- if (*s == 10)
- prom_printf("%c", 13);
- prom_printf("%c", *s++);
- }
-}
-
-static int __init prom_console_setup(struct console *co, char *options)
-{
- return 0;
-}
-
-static struct console sercons =
-{
- .name = "ttyS",
- .write = prom_console_write,
- .setup = prom_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-/*
- * Register console.
- */
-
-static int __init prom_console_init(void)
-{
- register_console(&sercons);
-
- return 0;
-}
-console_initcall(prom_console_init);
diff --git a/arch/mips/dec/reset.c b/arch/mips/dec/reset.c
index 7e4d34d0573..c15a879046e 100644
--- a/arch/mips/dec/reset.c
+++ b/arch/mips/dec/reset.c
@@ -8,34 +8,33 @@
#include <linux/linkage.h>
#include <asm/addrspace.h>
-#include <asm/ptrace.h>
-typedef void ATTRIB_NORET (* noret_func_t)(void);
+typedef void __noreturn (* noret_func_t)(void);
-static inline void ATTRIB_NORET back_to_prom(void)
+static inline void __noreturn back_to_prom(void)
{
- noret_func_t func = (void *) KSEG1ADDR(0x1fc00000);
+ noret_func_t func = (void *)CKSEG1ADDR(0x1fc00000);
func();
}
-void ATTRIB_NORET dec_machine_restart(char *command)
+void __noreturn dec_machine_restart(char *command)
{
back_to_prom();
}
-void ATTRIB_NORET dec_machine_halt(void)
+void __noreturn dec_machine_halt(void)
{
back_to_prom();
}
-void ATTRIB_NORET dec_machine_power_off(void)
+void __noreturn dec_machine_power_off(void)
{
/* DECstations don't have a software power switch */
back_to_prom();
}
-irqreturn_t dec_intr_halt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t dec_intr_halt(int irq, void *dev_id)
{
dec_machine_halt();
}
diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
index 6a69309baf4..41bbffd9cc0 100644
--- a/arch/mips/dec/setup.c
+++ b/arch/mips/dec/setup.c
@@ -1,25 +1,29 @@
/*
- * Setup the interrupt stuff.
+ * System-specific setup, especially interrupts.
*
* 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
- * Copyright (C) 2000, 2001, 2002, 2003 Maciej W. Rozycki
+ * Copyright (C) 2000, 2001, 2002, 2003, 2005 Maciej W. Rozycki
*/
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/param.h>
#include <linux/console.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/types.h>
+#include <linux/pm.h>
+#include <linux/irq.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/cpu-features.h>
+#include <asm/cpu-type.h>
#include <asm/irq.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
@@ -38,24 +42,31 @@
#include <asm/dec/kn02ca.h>
#include <asm/dec/kn03.h>
#include <asm/dec/kn230.h>
+#include <asm/dec/system.h>
extern void dec_machine_restart(char *command);
extern void dec_machine_halt(void);
extern void dec_machine_power_off(void);
-extern irqreturn_t dec_intr_halt(int irq, void *dev_id, struct pt_regs *regs);
+extern irqreturn_t dec_intr_halt(int irq, void *dev_id);
-extern asmlinkage void decstation_handle_int(void);
+unsigned long dec_kn_slot_base, dec_kn_slot_size;
-spinlock_t ioasic_ssr_lock;
+EXPORT_SYMBOL(dec_kn_slot_base);
+EXPORT_SYMBOL(dec_kn_slot_size);
+
+int dec_tc_bus;
+
+DEFINE_SPINLOCK(ioasic_ssr_lock);
volatile u32 *ioasic_base;
-unsigned long dec_kn_slot_size;
+
+EXPORT_SYMBOL(ioasic_base);
/*
* IRQ routing and priority tables. Priorites are set as follows:
*
- * KN01 KN230 KN02 KN02-BA KN02-CA KN03
+ * KN01 KN230 KN02 KN02-BA KN02-CA KN03
*
* MEMORY CPU CPU CPU ASIC CPU CPU
* RTC CPU CPU CPU ASIC CPU CPU
@@ -77,6 +88,9 @@ unsigned long dec_kn_slot_size;
int dec_interrupt[DEC_NR_INTS] = {
[0 ... DEC_NR_INTS - 1] = -1
};
+
+EXPORT_SYMBOL(dec_interrupt);
+
int_ptr cpu_mask_nr_tbl[DEC_MAX_CPU_INTS][2] = {
{ { .i = ~0 }, { .p = dec_intr_unimplemented } },
};
@@ -88,31 +102,43 @@ int cpu_fpu_mask = DEC_CPU_IRQ_MASK(DEC_CPU_INR_FPU);
static struct irqaction ioirq = {
.handler = no_action,
.name = "cascade",
+ .flags = IRQF_NO_THREAD,
};
static struct irqaction fpuirq = {
.handler = no_action,
.name = "fpu",
+ .flags = IRQF_NO_THREAD,
};
static struct irqaction busirq = {
- .flags = SA_INTERRUPT,
.name = "bus error",
+ .flags = IRQF_NO_THREAD,
};
static struct irqaction haltirq = {
.handler = dec_intr_halt,
.name = "halt",
+ .flags = IRQF_NO_THREAD,
};
/*
* Bus error (DBE/IBE exceptions and bus interrupts) handling setup.
*/
-void __init dec_be_init(void)
+static void __init dec_be_init(void)
{
switch (mips_machtype) {
case MACH_DS23100: /* DS2100/DS3100 Pmin/Pmax */
- busirq.flags |= SA_SHIRQ;
+ board_be_handler = dec_kn01_be_handler;
+ busirq.handler = dec_kn01_be_interrupt;
+ busirq.flags |= IRQF_SHARED;
+ dec_kn01_be_init();
+ break;
+ case MACH_DS5000_1XX: /* DS5000/1xx 3min */
+ case MACH_DS5000_XX: /* DS5000/xx Maxine */
+ board_be_handler = dec_kn02xa_be_handler;
+ busirq.handler = dec_kn02xa_be_interrupt;
+ dec_kn02xa_be_init();
break;
case MACH_DS5000_200: /* DS5000/200 3max */
case MACH_DS5000_2X0: /* DS5000/240 3max+ */
@@ -124,24 +150,19 @@ void __init dec_be_init(void)
}
}
-
-extern void dec_time_init(void);
-extern void dec_timer_setup(struct irqaction *);
-
-static void __init decstation_setup(void)
+void __init plat_mem_setup(void)
{
board_be_init = dec_be_init;
- board_time_init = dec_time_init;
- board_timer_setup = dec_timer_setup;
wbflush_setup();
_machine_restart = dec_machine_restart;
_machine_halt = dec_machine_halt;
- _machine_power_off = dec_machine_power_off;
-}
+ pm_power_off = dec_machine_power_off;
-early_initcall(decstation_setup);
+ ioport_resource.start = ~0UL;
+ ioport_resource.end = 0UL;
+}
/*
* Machine-specific initialisation for KN01, aka DS2100 (aka Pmin)
@@ -206,7 +227,7 @@ static int_ptr kn01_cpu_mask_nr_tbl[][2] __initdata = {
{ .p = cpu_all_int } },
};
-void __init dec_init_kn01(void)
+static void __init dec_init_kn01(void)
{
/* IRQ routing. */
memcpy(&dec_interrupt, &kn01_interrupt,
@@ -216,7 +237,7 @@ void __init dec_init_kn01(void)
memcpy(&cpu_mask_nr_tbl, &kn01_cpu_mask_nr_tbl,
sizeof(kn01_cpu_mask_nr_tbl));
- mips_cpu_irq_init(DEC_CPU_IRQ_BASE);
+ mips_cpu_irq_init();
} /* dec_init_kn01 */
@@ -281,7 +302,7 @@ static int_ptr kn230_cpu_mask_nr_tbl[][2] __initdata = {
{ .p = cpu_all_int } },
};
-void __init dec_init_kn230(void)
+static void __init dec_init_kn230(void)
{
/* IRQ routing. */
memcpy(&dec_interrupt, &kn230_interrupt,
@@ -291,7 +312,7 @@ void __init dec_init_kn230(void)
memcpy(&cpu_mask_nr_tbl, &kn230_cpu_mask_nr_tbl,
sizeof(kn230_cpu_mask_nr_tbl));
- mips_cpu_irq_init(DEC_CPU_IRQ_BASE);
+ mips_cpu_irq_init();
} /* dec_init_kn230 */
@@ -371,7 +392,7 @@ static int_ptr kn02_asic_mask_nr_tbl[][2] __initdata = {
{ .p = kn02_all_int } },
};
-void __init dec_init_kn02(void)
+static void __init dec_init_kn02(void)
{
/* IRQ routing. */
memcpy(&dec_interrupt, &kn02_interrupt,
@@ -385,7 +406,7 @@ void __init dec_init_kn02(void)
memcpy(&asic_mask_nr_tbl, &kn02_asic_mask_nr_tbl,
sizeof(kn02_asic_mask_nr_tbl));
- mips_cpu_irq_init(DEC_CPU_IRQ_BASE);
+ mips_cpu_irq_init();
init_kn02_irqs(KN02_IRQ_BASE);
} /* dec_init_kn02 */
@@ -472,7 +493,7 @@ static int_ptr kn02ba_asic_mask_nr_tbl[][2] __initdata = {
{ .p = asic_all_int } },
};
-void __init dec_init_kn02ba(void)
+static void __init dec_init_kn02ba(void)
{
/* IRQ routing. */
memcpy(&dec_interrupt, &kn02ba_interrupt,
@@ -486,7 +507,7 @@ void __init dec_init_kn02ba(void)
memcpy(&asic_mask_nr_tbl, &kn02ba_asic_mask_nr_tbl,
sizeof(kn02ba_asic_mask_nr_tbl));
- mips_cpu_irq_init(DEC_CPU_IRQ_BASE);
+ mips_cpu_irq_init();
init_ioasic_irqs(IO_IRQ_BASE);
} /* dec_init_kn02ba */
@@ -569,7 +590,7 @@ static int_ptr kn02ca_asic_mask_nr_tbl[][2] __initdata = {
{ .p = asic_all_int } },
};
-void __init dec_init_kn02ca(void)
+static void __init dec_init_kn02ca(void)
{
/* IRQ routing. */
memcpy(&dec_interrupt, &kn02ca_interrupt,
@@ -583,7 +604,7 @@ void __init dec_init_kn02ca(void)
memcpy(&asic_mask_nr_tbl, &kn02ca_asic_mask_nr_tbl,
sizeof(kn02ca_asic_mask_nr_tbl));
- mips_cpu_irq_init(DEC_CPU_IRQ_BASE);
+ mips_cpu_irq_init();
init_ioasic_irqs(IO_IRQ_BASE);
} /* dec_init_kn02ca */
@@ -670,7 +691,7 @@ static int_ptr kn03_asic_mask_nr_tbl[][2] __initdata = {
{ .p = asic_all_int } },
};
-void __init dec_init_kn03(void)
+static void __init dec_init_kn03(void)
{
/* IRQ routing. */
memcpy(&dec_interrupt, &kn03_interrupt,
@@ -684,7 +705,7 @@ void __init dec_init_kn03(void)
memcpy(&asic_mask_nr_tbl, &kn03_asic_mask_nr_tbl,
sizeof(kn03_asic_mask_nr_tbl));
- mips_cpu_irq_init(DEC_CPU_IRQ_BASE);
+ mips_cpu_irq_init();
init_ioasic_irqs(IO_IRQ_BASE);
} /* dec_init_kn03 */
@@ -722,13 +743,16 @@ void __init arch_init_irq(void)
panic("Don't know how to set this up!");
break;
}
- set_except_vector(0, decstation_handle_int);
/* Free the FPU interrupt if the exception is present. */
if (!cpu_has_nofpuex) {
cpu_fpu_mask = 0;
dec_interrupt[DEC_IRQ_FPU] = -1;
}
+ /* Free the halt interrupt unused on R4k systems. */
+ if (current_cpu_type() == CPU_R4000SC ||
+ current_cpu_type() == CPU_R4400SC)
+ dec_interrupt[DEC_IRQ_HALT] = -1;
/* Register board interrupts: FPU and cascade. */
if (dec_interrupt[DEC_IRQ_FPU] >= 0)
@@ -745,6 +769,8 @@ void __init arch_init_irq(void)
setup_irq(dec_interrupt[DEC_IRQ_HALT], &haltirq);
}
-EXPORT_SYMBOL(ioasic_base);
-EXPORT_SYMBOL(dec_kn_slot_size);
-EXPORT_SYMBOL(dec_interrupt);
+asmlinkage unsigned int dec_irq_dispatch(unsigned int irq)
+{
+ do_IRQ(irq);
+ return 0;
+}
diff --git a/arch/mips/dec/tc.c b/arch/mips/dec/tc.c
new file mode 100644
index 00000000000..732027c7983
--- /dev/null
+++ b/arch/mips/dec/tc.c
@@ -0,0 +1,95 @@
+/*
+ * TURBOchannel architecture calls.
+ *
+ * Copyright (c) Harald Koerfgen, 1998
+ * Copyright (c) 2001, 2003, 2005, 2006 Maciej W. Rozycki
+ * Copyright (c) 2005 James Simmons
+ *
+ * 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/compiler.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/tc.h>
+#include <linux/types.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/paccess.h>
+
+#include <asm/dec/interrupts.h>
+#include <asm/dec/prom.h>
+#include <asm/dec/system.h>
+
+/*
+ * Protected read byte from TURBOchannel slot space.
+ */
+int tc_preadb(u8 *valp, void __iomem *addr)
+{
+ return get_dbe(*valp, (u8 *)addr);
+}
+
+/*
+ * Get TURBOchannel bus information as specified by the spec, plus
+ * the slot space base address and the number of slots.
+ */
+int __init tc_bus_get_info(struct tc_bus *tbus)
+{
+ if (!dec_tc_bus)
+ return -ENXIO;
+
+ memcpy(&tbus->info, rex_gettcinfo(), sizeof(tbus->info));
+ tbus->slot_base = CPHYSADDR((long)rex_slot_address(0));
+
+ switch (mips_machtype) {
+ case MACH_DS5000_200:
+ tbus->num_tcslots = 7;
+ break;
+ case MACH_DS5000_2X0:
+ case MACH_DS5900:
+ tbus->ext_slot_base = 0x20000000;
+ tbus->ext_slot_size = 0x20000000;
+ /* fall through */
+ case MACH_DS5000_1XX:
+ tbus->num_tcslots = 3;
+ break;
+ case MACH_DS5000_XX:
+ tbus->num_tcslots = 2;
+ default:
+ break;
+ }
+ return 0;
+}
+
+/*
+ * Get the IRQ for the specified slot.
+ */
+void __init tc_device_get_irq(struct tc_dev *tdev)
+{
+ switch (tdev->slot) {
+ case 0:
+ tdev->interrupt = dec_interrupt[DEC_IRQ_TC0];
+ break;
+ case 1:
+ tdev->interrupt = dec_interrupt[DEC_IRQ_TC1];
+ break;
+ case 2:
+ tdev->interrupt = dec_interrupt[DEC_IRQ_TC2];
+ break;
+ /*
+ * Yuck! DS5000/200 onboard devices
+ */
+ case 5:
+ tdev->interrupt = dec_interrupt[DEC_IRQ_TC5];
+ break;
+ case 6:
+ tdev->interrupt = dec_interrupt[DEC_IRQ_TC6];
+ break;
+ default:
+ tdev->interrupt = -1;
+ break;
+ }
+}
diff --git a/arch/mips/dec/time.c b/arch/mips/dec/time.c
index dc7091caa7a..1914e56f0d9 100644
--- a/arch/mips/dec/time.c
+++ b/arch/mips/dec/time.c
@@ -1,6 +1,4 @@
/*
- * linux/arch/mips/dec/time.c
- *
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
* Copyright (C) 2000, 2003 Maciej W. Rozycki
*
@@ -9,52 +7,24 @@
*
*/
#include <linux/bcd.h>
-#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
#include <linux/mc146818rtc.h>
-#include <linux/mm.h>
-#include <linux/module.h>
#include <linux/param.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/time.h>
-#include <linux/types.h>
-
-#include <asm/bootinfo.h>
-#include <asm/cpu.h>
-#include <asm/div64.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mipsregs.h>
-#include <asm/sections.h>
-#include <asm/time.h>
+#include <asm/cpu-features.h>
+#include <asm/ds1287.h>
+#include <asm/time.h>
#include <asm/dec/interrupts.h>
#include <asm/dec/ioasic.h>
-#include <asm/dec/ioasic_addrs.h>
#include <asm/dec/machtype.h>
-
-static unsigned long dec_rtc_get_time(void)
+void read_persistent_clock(struct timespec *ts)
{
unsigned int year, mon, day, hour, min, sec, real_year;
- int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rtc_lock, flags);
- /* The Linux interpretation of the DS1287 clock register contents:
- * When the Update-In-Progress (UIP) flag goes from 1 to 0, the
- * RTC registers show the second which has precisely just started.
- * Let's hope other operating systems interpret the RTC the same way.
- */
- /* read RTC exactly on falling edge of update flag */
- for (i = 0; i < 1000000; i++) /* may take up to 1 second... */
- if (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP)
- break;
- for (i = 0; i < 1000000; i++) /* must try at least 2.228 ms */
- if (!(CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP))
- break;
- /* Isn't this overkill? UIP above should guarantee consistency */
do {
sec = CMOS_READ(RTC_SECONDS);
min = CMOS_READ(RTC_MINUTES);
@@ -62,39 +32,46 @@ static unsigned long dec_rtc_get_time(void)
day = CMOS_READ(RTC_DAY_OF_MONTH);
mon = CMOS_READ(RTC_MONTH);
year = CMOS_READ(RTC_YEAR);
+ /*
+ * The PROM will reset the year to either '72 or '73.
+ * Therefore we store the real year separately, in one
+ * of unused BBU RAM locations.
+ */
+ real_year = CMOS_READ(RTC_DEC_YEAR);
} while (sec != CMOS_READ(RTC_SECONDS));
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
- sec = BCD2BIN(sec);
- min = BCD2BIN(min);
- hour = BCD2BIN(hour);
- day = BCD2BIN(day);
- mon = BCD2BIN(mon);
- year = BCD2BIN(year);
+ sec = bcd2bin(sec);
+ min = bcd2bin(min);
+ hour = bcd2bin(hour);
+ day = bcd2bin(day);
+ mon = bcd2bin(mon);
+ year = bcd2bin(year);
}
- /*
- * The PROM will reset the year to either '72 or '73.
- * Therefore we store the real year separately, in one
- * of unused BBU RAM locations.
- */
- real_year = CMOS_READ(RTC_DEC_YEAR);
+
year += real_year - 72 + 2000;
- return mktime(year, mon, day, hour, min, sec);
+ ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+ ts->tv_nsec = 0;
}
/*
- * In order to set the CMOS clock precisely, dec_rtc_set_mmss has to
+ * In order to set the CMOS clock precisely, rtc_mips_set_mmss has to
* be called 500 ms after the second nowtime has started, because when
* nowtime is written into the registers of the CMOS clock, it will
* jump to the next second precisely 500 ms later. Check the Dallas
* DS1287 data sheet for details.
*/
-static int dec_rtc_set_mmss(unsigned long nowtime)
+int rtc_mips_set_mmss(unsigned long nowtime)
{
int retval = 0;
int real_seconds, real_minutes, cmos_minutes;
unsigned char save_control, save_freq_select;
+ /* irq are locally disabled here */
+ spin_lock(&rtc_lock);
/* tell the clock it's being set */
save_control = CMOS_READ(RTC_CONTROL);
CMOS_WRITE((save_control | RTC_SET), RTC_CONTROL);
@@ -105,7 +82,7 @@ static int dec_rtc_set_mmss(unsigned long nowtime)
cmos_minutes = CMOS_READ(RTC_MINUTES);
if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
- cmos_minutes = BCD2BIN(cmos_minutes);
+ cmos_minutes = bcd2bin(cmos_minutes);
/*
* since we're only adjusting minutes and seconds,
@@ -121,13 +98,13 @@ static int dec_rtc_set_mmss(unsigned long nowtime)
if (abs(real_minutes - cmos_minutes) < 30) {
if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
- real_seconds = BIN2BCD(real_seconds);
- real_minutes = BIN2BCD(real_minutes);
+ real_seconds = bin2bcd(real_seconds);
+ real_minutes = bin2bcd(real_minutes);
}
CMOS_WRITE(real_seconds, RTC_SECONDS);
CMOS_WRITE(real_minutes, RTC_MINUTES);
} else {
- printk(KERN_WARNING
+ printk_once(KERN_NOTICE
"set_rtc_mmss: can't update from %d to %d\n",
cmos_minutes, real_minutes);
retval = -1;
@@ -141,60 +118,54 @@ static int dec_rtc_set_mmss(unsigned long nowtime)
*/
CMOS_WRITE(save_control, RTC_CONTROL);
CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
+ spin_unlock(&rtc_lock);
return retval;
}
-
-static int dec_timer_state(void)
-{
- return (CMOS_READ(RTC_REG_C) & RTC_PF) != 0;
-}
-
-static void dec_timer_ack(void)
-{
- CMOS_READ(RTC_REG_C); /* Ack the RTC interrupt. */
-}
-
-static unsigned int dec_ioasic_hpt_read(void)
+void __init plat_time_init(void)
{
- /*
- * The free-running counter is 32-bit which is good for about
- * 2 minutes, 50 seconds at possible count rates of up to 25MHz.
- */
- return ioasic_read(IO_REG_FCTR);
-}
-
-static void dec_ioasic_hpt_init(unsigned int count)
-{
- ioasic_write(IO_REG_FCTR, ioasic_read(IO_REG_FCTR) - count);
-}
-
-
-void __init dec_time_init(void)
-{
- rtc_get_time = dec_rtc_get_time;
- rtc_set_mmss = dec_rtc_set_mmss;
-
- mips_timer_state = dec_timer_state;
- mips_timer_ack = dec_timer_ack;
-
- if (!cpu_has_counter && IOASIC) {
- /* For pre-R4k systems we use the I/O ASIC's counter. */
- mips_hpt_read = dec_ioasic_hpt_read;
- mips_hpt_init = dec_ioasic_hpt_init;
+ int ioasic_clock = 0;
+ u32 start, end;
+ int i = HZ / 8;
+
+ /* Set up the rate of periodic DS1287 interrupts. */
+ ds1287_set_base_clock(HZ);
+
+ /* On some I/O ASIC systems we have the I/O ASIC's counter. */
+ if (IOASIC)
+ ioasic_clock = dec_ioasic_clocksource_init() == 0;
+ if (cpu_has_counter) {
+ ds1287_timer_state();
+ while (!ds1287_timer_state())
+ ;
+
+ start = read_c0_count();
+
+ while (i--)
+ while (!ds1287_timer_state())
+ ;
+
+ end = read_c0_count();
+
+ mips_hpt_frequency = (end - start) * 8;
+ printk(KERN_INFO "MIPS counter frequency %dHz\n",
+ mips_hpt_frequency);
+
+ /*
+ * All R4k DECstations suffer from the CP0 Count erratum,
+ * so we can't use the timer as a clock source, and a clock
+ * event both at a time. An accurate wall clock is more
+ * important than a high-precision interval timer so only
+ * use the timer as a clock source, and not a clock event
+ * if there's no I/O ASIC counter available to serve as a
+ * clock source.
+ */
+ if (!ioasic_clock) {
+ init_r4k_clocksource();
+ mips_hpt_frequency = 0;
+ }
}
- /* Set up the rate of periodic DS1287 interrupts. */
- CMOS_WRITE(RTC_REF_CLCK_32KHZ | (16 - LOG_2_HZ), RTC_REG_A);
-}
-
-EXPORT_SYMBOL(do_settimeofday);
-
-void __init dec_timer_setup(struct irqaction *irq)
-{
- setup_irq(dec_interrupt[DEC_IRQ_RTC], irq);
-
- /* Enable periodic DS1287 interrupts. */
- CMOS_WRITE(CMOS_READ(RTC_REG_B) | RTC_PIE, RTC_REG_B);
+ ds1287_clockevent_init(dec_interrupt[DEC_IRQ_RTC]);
}
diff --git a/arch/mips/dec/wbflush.c b/arch/mips/dec/wbflush.c
index 925c0525344..56bda4a396b 100644
--- a/arch/mips/dec/wbflush.c
+++ b/arch/mips/dec/wbflush.c
@@ -2,9 +2,9 @@
* Setup the right wbflush routine for the different DECstations.
*
* Created with information from:
- * DECstation 3100 Desktop Workstation Functional Specification
- * DECstation 5000/200 KN02 System Module Functional Specification
- * mipsel-linux-objdump --disassemble vmunix | grep "wbflush" :-)
+ * DECstation 3100 Desktop Workstation Functional Specification
+ * DECstation 5000/200 KN02 System Module Functional Specification
+ * mipsel-linux-objdump --disassemble vmunix | grep "wbflush" :-)
*
* 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
@@ -17,8 +17,8 @@
#include <linux/init.h>
#include <asm/bootinfo.h>
-#include <asm/system.h>
#include <asm/wbflush.h>
+#include <asm/barrier.h>
static void wbflush_kn01(void);
static void wbflush_kn210(void);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 13:32:28 +0000