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Message-Id: <20231219-sam-sparc32-sunset-v3-v1-22-64bb44b598c5@ravnborg.org>
Date: Tue, 19 Dec 2023 23:03:27 +0100
From: Sam Ravnborg via B4 Relay <devnull+sam.ravnborg.org@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Arnd Bergmann <arnd@...nel.org>, Andreas Larsson <andreas@...sler.com>
Cc: Helge Deller <deller@....de>, Alexander Viro <viro@...iv.linux.org.uk>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>, Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>, sparclinux@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-sound@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 22/27] sparc32: Drop sun4m irq support
From: Sam Ravnborg <sam@...nborg.org>
Drop all code uses to support sun4m irqs.
Update entry.S to call the leon_nmi function.
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Arnd Bergmann <arnd@...nel.org>
Cc: Andreas Larsson <andreas@...sler.com>
---
arch/sparc/kernel/Makefile | 1 -
arch/sparc/kernel/entry.S | 29 ++---
arch/sparc/kernel/irq.h | 47 +-------
arch/sparc/kernel/irq_32.c | 6 +-
arch/sparc/kernel/kernel.h | 4 -
arch/sparc/kernel/leon_kernel.c | 10 +-
arch/sparc/kernel/sun4m_irq.c | 238 ----------------------------------------
7 files changed, 23 insertions(+), 312 deletions(-)
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 09577e39037c..1961d165b279 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -29,7 +29,6 @@ obj-y += traps_$(BITS).o
# IRQ
obj-y += irq_$(BITS).o
-obj-$(CONFIG_SPARC32) += sun4m_irq.o
obj-y += process_$(BITS).o
obj-y += process.o
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index eecbe0be7bf6..fb6095aab9c2 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -427,36 +427,21 @@ setcc_trap_handler:
jmp %l2 ! advance over trap instruction
rett %l2 + 0x4 ! like this...
-sun4m_nmi_error:
+nmi_error:
/* NMI async memory error handling. */
- sethi %hi(0x80000000), %l4
- sethi %hi(sun4m_irq_global), %o5
- ld [%o5 + %lo(sun4m_irq_global)], %l5
- st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000
- WRITE_PAUSE
- ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
- WRITE_PAUSE
+#ifndef CONFIG_SMP
+ .align 4
+ .globl linux_trap_ipi15_leon
+linux_trap_ipi15_leon:
+ SAVE_ALL
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
- call sun4m_nmi
+ call leon_nmi
nop
- st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000
- WRITE_PAUSE
- ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
- WRITE_PAUSE
RESTORE_ALL
-
-#ifndef CONFIG_SMP
- .align 4
- .globl linux_trap_ipi15_leon
-linux_trap_ipi15_leon:
- SAVE_ALL
-
- ba sun4m_nmi_error
- nop
#endif /* CONFIG_SMP */
.align 4
diff --git a/arch/sparc/kernel/irq.h b/arch/sparc/kernel/irq.h
index 8a0b314c8299..9d15dbb9fe6f 100644
--- a/arch/sparc/kernel/irq.h
+++ b/arch/sparc/kernel/irq.h
@@ -10,39 +10,14 @@ struct irq_bucket {
unsigned int pil;
};
-#define SUN4M_HARD_INT(x) (0x000000001 << (x))
-#define SUN4M_SOFT_INT(x) (0x000010000 << (x))
-
-#define SUN4D_MAX_BOARD 10
-#define SUN4D_MAX_IRQ ((SUN4D_MAX_BOARD + 2) << 5)
+#define MAX_BOARD 10
+#define MAX_IRQ ((MAX_BOARD + 2) << 5)
/* Map between the irq identifier used in hw to the
* irq_bucket. The map is sufficient large to hold
* the sun4d hw identifiers.
*/
-extern struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
-
-
-/* sun4m specific type definitions */
-
-/* This maps direct to CPU specific interrupt registers */
-struct sun4m_irq_percpu {
- u32 pending;
- u32 clear;
- u32 set;
-};
-
-/* This maps direct to global interrupt registers */
-struct sun4m_irq_global {
- u32 pending;
- u32 mask;
- u32 mask_clear;
- u32 mask_set;
- u32 interrupt_target;
-};
-
-extern struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
-extern struct sun4m_irq_global __iomem *sun4m_irq_global;
+extern struct irq_bucket *irq_map[MAX_IRQ];
unsigned int irq_alloc(unsigned int real_irq, unsigned int pil);
void irq_link(unsigned int irq);
@@ -51,22 +26,8 @@ void handler_irq(unsigned int pil, struct pt_regs *regs);
unsigned long leon_get_irqmask(unsigned int irq);
-/* sun4m_irq.c */
-void sun4m_nmi(struct pt_regs *regs);
-
-/* sun4d_irq.c */
-void sun4d_handler_irq(unsigned int pil, struct pt_regs *regs);
-
/* leon_kernel.c */
void leon_clear_clock_irq(void);
void leon_load_profile_irq(int cpu, unsigned int limit);
u32 leon_cycles_offset(void);
-
-#ifdef CONFIG_SMP
-
-/* All SUN4D IPIs are sent on this IRQ, may be shared with hard IRQs */
-#define SUN4D_IPI_IRQ 13
-
-void sun4d_ipi_interrupt(void);
-
-#endif
+void leon_nmi(struct pt_regs *regs);
diff --git a/arch/sparc/kernel/irq_32.c b/arch/sparc/kernel/irq_32.c
index f76f57073323..5bd64828e8a0 100644
--- a/arch/sparc/kernel/irq_32.c
+++ b/arch/sparc/kernel/irq_32.c
@@ -111,7 +111,7 @@ static struct irq_bucket irq_table[NR_IRQS];
static DEFINE_SPINLOCK(irq_table_lock);
/* Map between the irq identifier used in hw to the irq_bucket. */
-struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
+struct irq_bucket *irq_map[MAX_IRQ];
/* Protect access to irq_map */
static DEFINE_SPINLOCK(irq_map_lock);
@@ -162,7 +162,7 @@ void irq_link(unsigned int irq)
p = &irq_table[irq];
pil = p->pil;
- BUG_ON(pil >= SUN4D_MAX_IRQ);
+ BUG_ON(pil >= MAX_IRQ);
p->next = irq_map[pil];
irq_map[pil] = p;
@@ -179,7 +179,7 @@ void irq_unlink(unsigned int irq)
spin_lock_irqsave(&irq_map_lock, flags);
p = &irq_table[irq];
- BUG_ON(p->pil >= SUN4D_MAX_IRQ);
+ BUG_ON(p->pil >= MAX_IRQ);
pnext = &irq_map[p->pil];
while (*pnext != p)
pnext = &(*pnext)->next;
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index a14812903629..30adbec894f7 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -92,10 +92,6 @@ extern spinlock_t irq_action_lock;
void unexpected_irq(int irq, void *dev_id, struct pt_regs * regs);
-/* sun4m_irq.c */
-void sun4m_unmask_profile_irq(void);
-void sun4m_clear_profile_irq(int cpu);
-
/* leon_smp.c */
void leon_cpu_pre_starting(void *arg);
void leon_cpu_pre_online(void *arg);
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index fa9cdaffdc6b..1bdf08db3037 100644
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -9,6 +9,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/interrupt.h>
+#include <linux/sched/debug.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
@@ -269,8 +270,15 @@ u32 leon_cycles_offset(void)
return off;
}
-#ifdef CONFIG_SMP
+/* NMI interrupt (15) */
+void leon_nmi(struct pt_regs *regs)
+{
+ printk(KERN_ERR "Aieee: NMI received!\n");
+ show_regs(regs);
+ prom_halt();
+}
+#ifdef CONFIG_SMP
/* smp clockevent irq */
static irqreturn_t leon_percpu_timer_ce_interrupt(int irq, void *unused)
{
diff --git a/arch/sparc/kernel/sun4m_irq.c b/arch/sparc/kernel/sun4m_irq.c
deleted file mode 100644
index 1a220a2b9ac3..000000000000
--- a/arch/sparc/kernel/sun4m_irq.c
+++ /dev/null
@@ -1,238 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * sun4m irq support
- *
- * djhr: Hacked out of irq.c into a CPU dependent version.
- *
- * Copyright (C) 1995 David S. Miller (davem@...p.rutgers.edu)
- * Copyright (C) 1995 Miguel de Icaza (miguel@...lecu.unam.mx)
- * Copyright (C) 1995 Pete A. Zaitcev (zaitcev@...oo.com)
- * Copyright (C) 1996 Dave Redman (djhr@...pole.co.uk)
- */
-
-#include <linux/slab.h>
-#include <linux/sched/debug.h>
-#include <linux/pgtable.h>
-
-#include <asm/timer.h>
-#include <asm/traps.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/cacheflush.h>
-
-#include "irq.h"
-#include "kernel.h"
-
-/* Sample sun4m IRQ layout:
- *
- * 0x22 - Power
- * 0x24 - ESP SCSI
- * 0x26 - Lance ethernet
- * 0x2b - Floppy
- * 0x2c - Zilog uart
- * 0x32 - SBUS level 0
- * 0x33 - Parallel port, SBUS level 1
- * 0x35 - SBUS level 2
- * 0x37 - SBUS level 3
- * 0x39 - Audio, Graphics card, SBUS level 4
- * 0x3b - SBUS level 5
- * 0x3d - SBUS level 6
- *
- * Each interrupt source has a mask bit in the interrupt registers.
- * When the mask bit is set, this blocks interrupt deliver. So you
- * clear the bit to enable the interrupt.
- *
- * Interrupts numbered less than 0x10 are software triggered interrupts
- * and unused by Linux.
- *
- * Interrupt level assignment on sun4m:
- *
- * level source
- * ------------------------------------------------------------
- * 1 softint-1
- * 2 softint-2, VME/SBUS level 1
- * 3 softint-3, VME/SBUS level 2
- * 4 softint-4, onboard SCSI
- * 5 softint-5, VME/SBUS level 3
- * 6 softint-6, onboard ETHERNET
- * 7 softint-7, VME/SBUS level 4
- * 8 softint-8, onboard VIDEO
- * 9 softint-9, VME/SBUS level 5, Module Interrupt
- * 10 softint-10, system counter/timer
- * 11 softint-11, VME/SBUS level 6, Floppy
- * 12 softint-12, Keyboard/Mouse, Serial
- * 13 softint-13, VME/SBUS level 7, ISDN Audio
- * 14 softint-14, per-processor counter/timer
- * 15 softint-15, Asynchronous Errors (broadcast)
- *
- * Each interrupt source is masked distinctly in the sun4m interrupt
- * registers. The PIL level alone is therefore ambiguous, since multiple
- * interrupt sources map to a single PIL.
- *
- * This ambiguity is resolved in the 'intr' property for device nodes
- * in the OF device tree. Each 'intr' property entry is composed of
- * two 32-bit words. The first word is the IRQ priority value, which
- * is what we're intersted in. The second word is the IRQ vector, which
- * is unused.
- *
- * The low 4 bits of the IRQ priority indicate the PIL, and the upper
- * 4 bits indicate onboard vs. SBUS leveled vs. VME leveled. 0x20
- * means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
- *
- * For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
- * whereas a value of 0x33 is SBUS level 2. Here are some sample
- * 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
- * Tadpole S3 GX systems.
- *
- * esp: 0x24 onboard ESP SCSI
- * le: 0x26 onboard Lance ETHERNET
- * p9100: 0x32 SBUS level 1 P9100 video
- * bpp: 0x33 SBUS level 2 BPP parallel port device
- * DBRI: 0x39 SBUS level 5 DBRI ISDN audio
- * SUNW,leo: 0x39 SBUS level 5 LEO video
- * pcmcia: 0x3b SBUS level 6 PCMCIA controller
- * uctrl: 0x3b SBUS level 6 UCTRL device
- * modem: 0x3d SBUS level 7 MODEM
- * zs: 0x2c onboard keyboard/mouse/serial
- * floppy: 0x2b onboard Floppy
- * power: 0x22 onboard power device (XXX unknown mask bit XXX)
- */
-
-
-/* Code in entry.S needs to get at these register mappings. */
-struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
-struct sun4m_irq_global __iomem *sun4m_irq_global;
-
-struct sun4m_handler_data {
- bool percpu;
- long mask;
-};
-
-/* Dave Redman (djhr@...pole.co.uk)
- * The sun4m interrupt registers.
- */
-#define SUN4M_INT_ENABLE 0x80000000
-#define SUN4M_INT_E14 0x00000080
-#define SUN4M_INT_E10 0x00080000
-
-#define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
-#define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
-#define SUN4M_INT_M2S_WRITE_ERR 0x20000000 /* write buffer error */
-#define SUN4M_INT_ECC_ERR 0x10000000 /* ecc memory error */
-#define SUN4M_INT_VME_ERR 0x08000000 /* vme async error */
-#define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
-#define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
-#define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
-#define SUN4M_INT_REALTIME 0x00080000 /* system timer */
-#define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
-#define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
-#define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
-#define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
-#define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
-#define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
-#define SUN4M_INT_VMEBITS 0x0000007F /* vme int bits */
-
-#define SUN4M_INT_ERROR (SUN4M_INT_MODULE_ERR | \
- SUN4M_INT_M2S_WRITE_ERR | \
- SUN4M_INT_ECC_ERR | \
- SUN4M_INT_VME_ERR)
-
-#define SUN4M_INT_SBUS(x) (1 << (x+7))
-#define SUN4M_INT_VME(x) (1 << (x))
-
-/* Interrupt levels used by OBP */
-#define OBP_INT_LEVEL_SOFT 0x10
-#define OBP_INT_LEVEL_ONBOARD 0x20
-#define OBP_INT_LEVEL_SBUS 0x30
-#define OBP_INT_LEVEL_VME 0x40
-
-#define SUN4M_TIMER_IRQ (OBP_INT_LEVEL_ONBOARD | 10)
-#define SUN4M_PROFILE_IRQ (OBP_INT_LEVEL_ONBOARD | 14)
-
-static unsigned long sun4m_imask[0x50] = {
- /* 0x00 - SMP */
- 0, SUN4M_SOFT_INT(1),
- SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
- SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
- SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
- SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
- SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
- SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
- SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
- /* 0x10 - soft */
- 0, SUN4M_SOFT_INT(1),
- SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
- SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
- SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
- SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
- SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
- SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
- SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
- /* 0x20 - onboard */
- 0, 0, 0, 0,
- SUN4M_INT_SCSI, 0, SUN4M_INT_ETHERNET, 0,
- SUN4M_INT_VIDEO, SUN4M_INT_MODULE,
- SUN4M_INT_REALTIME, SUN4M_INT_FLOPPY,
- (SUN4M_INT_SERIAL | SUN4M_INT_KBDMS),
- SUN4M_INT_AUDIO, SUN4M_INT_E14, SUN4M_INT_MODULE_ERR,
- /* 0x30 - sbus */
- 0, 0, SUN4M_INT_SBUS(0), SUN4M_INT_SBUS(1),
- 0, SUN4M_INT_SBUS(2), 0, SUN4M_INT_SBUS(3),
- 0, SUN4M_INT_SBUS(4), 0, SUN4M_INT_SBUS(5),
- 0, SUN4M_INT_SBUS(6), 0, 0,
- /* 0x40 - vme */
- 0, 0, SUN4M_INT_VME(0), SUN4M_INT_VME(1),
- 0, SUN4M_INT_VME(2), 0, SUN4M_INT_VME(3),
- 0, SUN4M_INT_VME(4), 0, SUN4M_INT_VME(5),
- 0, SUN4M_INT_VME(6), 0, 0
-};
-
-struct sun4m_timer_percpu {
- u32 l14_limit;
- u32 l14_count;
- u32 l14_limit_noclear;
- u32 user_timer_start_stop;
-};
-
-static struct sun4m_timer_percpu __iomem *timers_percpu[SUN4M_NCPUS];
-
-void sun4m_nmi(struct pt_regs *regs)
-{
- unsigned long afsr, afar, si;
-
- printk(KERN_ERR "Aieee: sun4m NMI received!\n");
- /* XXX HyperSparc hack XXX */
- __asm__ __volatile__("mov 0x500, %%g1\n\t"
- "lda [%%g1] 0x4, %0\n\t"
- "mov 0x600, %%g1\n\t"
- "lda [%%g1] 0x4, %1\n\t" :
- "=r" (afsr), "=r" (afar));
- printk(KERN_ERR "afsr=%08lx afar=%08lx\n", afsr, afar);
- si = sbus_readl(&sun4m_irq_global->pending);
- printk(KERN_ERR "si=%08lx\n", si);
- if (si & SUN4M_INT_MODULE_ERR)
- printk(KERN_ERR "Module async error\n");
- if (si & SUN4M_INT_M2S_WRITE_ERR)
- printk(KERN_ERR "MBus/SBus async error\n");
- if (si & SUN4M_INT_ECC_ERR)
- printk(KERN_ERR "ECC memory error\n");
- if (si & SUN4M_INT_VME_ERR)
- printk(KERN_ERR "VME async error\n");
- printk(KERN_ERR "you lose buddy boy...\n");
- show_regs(regs);
- prom_halt();
-}
-
-void sun4m_unmask_profile_irq(void)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- sbus_writel(sun4m_imask[SUN4M_PROFILE_IRQ], &sun4m_irq_global->mask_clear);
- local_irq_restore(flags);
-}
-
-void sun4m_clear_profile_irq(int cpu)
-{
- sbus_readl(&timers_percpu[cpu]->l14_limit);
-}
--
2.34.1
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