microblaze: Remove selfmodified feature

This was experimental feature which has never been
widely used because it expects GCC behaviour.
Also remove INTC_BASE and TIMER_BASE macros.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/include/asm/selfmod.h

-/*
- * Copyright (C) 2007-2008 Michal Simek <monstr@monstr.eu>
- *
- * 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.
- */
-
-#ifndef _ASM_MICROBLAZE_SELFMOD_H
-#define _ASM_MICROBLAZE_SELFMOD_H
-
-/*
- * BARRIER_BASE_ADDR is constant address for selfmod function.
- * do not change this value - selfmod function is in
- * arch/microblaze/kernel/selfmod.c: selfmod_function()
- *
- * last 16 bits is used for storing register offset
- */
-
-#define BARRIER_BASE_ADDR	0x1234ff00
-
-void selfmod_function(const int *arr_fce, const unsigned int base);
-
-#endif /* _ASM_MICROBLAZE_SELFMOD_H */

arch/microblaze/kernel/Makefile

@@ -7,7 +7,6 @@ ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_timer.o = -pg
 CFLAGS_REMOVE_intc.o = -pg
 CFLAGS_REMOVE_early_printk.o = -pg
-CFLAGS_REMOVE_selfmod.o = -pg
 CFLAGS_REMOVE_heartbeat.o = -pg
 CFLAGS_REMOVE_ftrace.o = -pg
 CFLAGS_REMOVE_process.o = -pg
@@ -23,7 +22,6 @@ obj-y += dma.o exceptions.o \
 obj-y += cpu/
 
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
-obj-$(CONFIG_SELFMOD)		+= selfmod.o
 obj-$(CONFIG_HEART_BEAT)	+= heartbeat.o
 obj-$(CONFIG_MODULES)		+= microblaze_ksyms.o module.o
 obj-$(CONFIG_MMU)		+= misc.o

arch/microblaze/kernel/intc.c

@@ -18,13 +18,7 @@
 #include <asm/prom.h>
 #include <asm/irq.h>
 
-#ifdef CONFIG_SELFMOD_INTC
-#include <asm/selfmod.h>
-#define INTC_BASE	BARRIER_BASE_ADDR
-#else
 static unsigned int intc_baseaddr;
-#define INTC_BASE	intc_baseaddr
-#endif
 
 /* No one else should require these constants, so define them locally here. */
 #define ISR 0x00			/* Interrupt Status Register */
@@ -50,21 +44,21 @@ static void intc_enable_or_unmask(struct irq_data *d)
 	 * acks the irq before calling the interrupt handler
 	 */
 	if (irqd_is_level_type(d))
-		out_be32(INTC_BASE + IAR, mask);
+		out_be32(intc_baseaddr + IAR, mask);
 
-	out_be32(INTC_BASE + SIE, mask);
+	out_be32(intc_baseaddr + SIE, mask);
 }
 
 static void intc_disable_or_mask(struct irq_data *d)
 {
 	pr_debug("disable: %ld\n", d->hwirq);
-	out_be32(INTC_BASE + CIE, 1 << d->hwirq);
+	out_be32(intc_baseaddr + CIE, 1 << d->hwirq);
 }
 
 static void intc_ack(struct irq_data *d)
 {
 	pr_debug("ack: %ld\n", d->hwirq);
-	out_be32(INTC_BASE + IAR, 1 << d->hwirq);
+	out_be32(intc_baseaddr + IAR, 1 << d->hwirq);
 }
 
 static void intc_mask_ack(struct irq_data *d)
@@ -72,8 +66,8 @@ static void intc_mask_ack(struct irq_data *d)
 	unsigned long mask = 1 << d->hwirq;
 
 	pr_debug("disable_and_ack: %ld\n", d->hwirq);
-	out_be32(INTC_BASE + CIE, mask);
-	out_be32(INTC_BASE + IAR, mask);
+	out_be32(intc_baseaddr + CIE, mask);
+	out_be32(intc_baseaddr + IAR, mask);
 }
 
 static struct irq_chip intc_dev = {
@@ -90,7 +84,7 @@ unsigned int get_irq(void)
 {
 	unsigned int hwirq, irq = -1;
 
-	hwirq = in_be32(INTC_BASE + IVR);
+	hwirq = in_be32(intc_baseaddr + IVR);
 	if (hwirq != -1U)
 		irq = irq_find_mapping(root_domain, hwirq);
 
@@ -124,18 +118,7 @@ void __init init_IRQ(void)
 {
 	u32 nr_irq, intr_mask;
 	struct device_node *intc = NULL;
-#ifdef CONFIG_SELFMOD_INTC
-	unsigned int intc_baseaddr = 0;
-	static int arr_func[] = {
-				(int)&get_irq,
-				(int)&intc_enable_or_unmask,
-				(int)&intc_disable_or_mask,
-				(int)&intc_mask_ack,
-				(int)&intc_ack,
-				(int)&intc_end,
-				0
-			};
-#endif
+
 	intc = of_find_compatible_node(NULL, NULL, "xlnx,xps-intc-1.00.a");
 	BUG_ON(!intc);
 
@@ -149,9 +132,6 @@ void __init init_IRQ(void)
 	if (intr_mask > (u32)((1ULL << nr_irq) - 1))
 		pr_info(" ERROR: Mismatch in kind-of-intr param\n");
 
-#ifdef CONFIG_SELFMOD_INTC
-	selfmod_function((int *) arr_func, intc_baseaddr);
-#endif
 	pr_info("%s #0 at 0x%08x, num_irq=%d, edge=0x%x\n",
 		intc->name, intc_baseaddr, nr_irq, intr_mask);
 

arch/microblaze/kernel/selfmod.c

-/*
- * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
- * Copyright (C) 2009 PetaLogix
- *
- * 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/interrupt.h>
-#include <asm/selfmod.h>
-
-#undef DEBUG
-
-#if __GNUC__ > 3
-#error GCC 4 unsupported SELFMOD. Please disable SELFMOD from menuconfig.
-#endif
-
-#define OPCODE_IMM		0xB0000000
-#define OPCODE_LWI		0xE8000000
-#define OPCODE_LWI_MASK		0xEC000000
-#define OPCODE_RTSD		0xB60F0008 /* return from func: rtsd r15, 8 */
-#define OPCODE_ADDIK		0x30000000
-#define OPCODE_ADDIK_MASK	0xFC000000
-
-#define IMM_BASE	(OPCODE_IMM | (BARRIER_BASE_ADDR >> 16))
-#define LWI_BASE	(OPCODE_LWI | (BARRIER_BASE_ADDR & 0x0000ff00))
-#define LWI_BASE_MASK	(OPCODE_LWI_MASK | (BARRIER_BASE_ADDR & 0x0000ff00))
-#define ADDIK_BASE	(OPCODE_ADDIK | (BARRIER_BASE_ADDR & 0x0000ff00))
-#define ADDIK_BASE_MASK	(OPCODE_ADDIK_MASK | (BARRIER_BASE_ADDR & 0x0000ff00))
-
-#define MODIFY_INSTR {						\
-	pr_debug("%s: curr instr, (%d):0x%x, next(%d):0x%x\n",		\
-		__func__, i, addr[i], i + 1, addr[i + 1]);		\
-	addr[i] = OPCODE_IMM + (base >> 16);				\
-	/* keep instruction opcode and add only last 16bits */		\
-	addr[i + 1] = (addr[i + 1] & 0xffff00ff) + (base & 0xffff);	\
-	__invalidate_icache(addr[i]);					\
-	__invalidate_icache(addr[i + 1]);				\
-	pr_debug("%s: hack instr, (%d):0x%x, next(%d):0x%x\n",		\
-		__func__, i, addr[i], i + 1, addr[i + 1]); }
-
-/* NOTE
- * self-modified part of code for improvement of interrupt controller
- * save instruction in interrupt rutine
- */
-void selfmod_function(const int *arr_fce, const unsigned int base)
-{
-	unsigned int flags, i, j, *addr = NULL;
-
-	local_irq_save(flags);
-	__disable_icache();
-
-	/* zero terminated array */
-	for (j = 0; arr_fce[j] != 0; j++) {
-		/* get start address of function */
-		addr = (unsigned int *) arr_fce[j];
-		pr_debug("%s: func(%d) at 0x%x\n",
-					__func__, j, (unsigned int) addr);
-		for (i = 0; ; i++) {
-			pr_debug("%s: instruction code at %d: 0x%x\n",
-						__func__, i, addr[i]);
-			if (addr[i] == IMM_BASE) {
-				/* detecting of lwi (0xE8) or swi (0xF8) instr
-				 * I can detect both opcode with one mask */
-				if ((addr[i + 1] & LWI_BASE_MASK) == LWI_BASE) {
-					MODIFY_INSTR;
-				} else /* detection addik for ack */
-				if ((addr[i + 1] & ADDIK_BASE_MASK) ==
-								ADDIK_BASE) {
-					MODIFY_INSTR;
-				}
-			} else if (addr[i] == OPCODE_RTSD) {
-				/* return from function means end of function */
-				pr_debug("%s: end of array %d\n", __func__, i);
-				break;
-			}
-		}
-	}
-	local_irq_restore(flags);
-} /* end of self-modified code */

arch/microblaze/kernel/setup.c

@@ -68,10 +68,6 @@ void __init setup_arch(char **cmdline_p)
 
 	xilinx_pci_init();
 
-#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
-	pr_notice("Self modified code enable\n");
-#endif
-
 #ifdef CONFIG_VT
 #if defined(CONFIG_XILINX_CONSOLE)
 	conswitchp = &xil_con;

arch/microblaze/kernel/timer.c

@@ -29,13 +29,7 @@
 #include <asm/irq.h>
 #include <linux/cnt32_to_63.h>
 
-#ifdef CONFIG_SELFMOD_TIMER
-#include <asm/selfmod.h>
-#define TIMER_BASE	BARRIER_BASE_ADDR
-#else
 static unsigned int timer_baseaddr;
-#define TIMER_BASE	timer_baseaddr
-#endif
 
 static unsigned int freq_div_hz;
 static unsigned int timer_clock_freq;
@@ -61,17 +55,19 @@ static unsigned int timer_clock_freq;
 
 static inline void microblaze_timer0_stop(void)
 {
-	out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0) & ~TCSR_ENT);
+	out_be32(timer_baseaddr + TCSR0,
+		 in_be32(timer_baseaddr + TCSR0) & ~TCSR_ENT);
 }
 
 static inline void microblaze_timer0_start_periodic(unsigned long load_val)
 {
 	if (!load_val)
 		load_val = 1;
-	out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */
+	/* loading value to timer reg */
+	out_be32(timer_baseaddr + TLR0, load_val);
 
 	/* load the initial value */
-	out_be32(TIMER_BASE + TCSR0, TCSR_LOAD);
+	out_be32(timer_baseaddr + TCSR0, TCSR_LOAD);
 
 	/* see timer data sheet for detail
 	 * !ENALL - don't enable 'em all
@@ -86,7 +82,7 @@ static inline void microblaze_timer0_start_periodic(unsigned long load_val)
 	 * UDT - set the timer as down counter
 	 * !MDT0 - generate mode
 	 */
-	out_be32(TIMER_BASE + TCSR0,
+	out_be32(timer_baseaddr + TCSR0,
 			TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT);
 }
 
@@ -94,12 +90,13 @@ static inline void microblaze_timer0_start_oneshot(unsigned long load_val)
 {
 	if (!load_val)
 		load_val = 1;
-	out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */
+	/* loading value to timer reg */
+	out_be32(timer_baseaddr + TLR0, load_val);
 
 	/* load the initial value */
-	out_be32(TIMER_BASE + TCSR0, TCSR_LOAD);
+	out_be32(timer_baseaddr + TCSR0, TCSR_LOAD);
 
-	out_be32(TIMER_BASE + TCSR0,
+	out_be32(timer_baseaddr + TCSR0,
 			TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT);
 }
 
@@ -146,7 +143,7 @@ static struct clock_event_device clockevent_microblaze_timer = {
 
 static inline void timer_ack(void)
 {
-	out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0));
+	out_be32(timer_baseaddr + TCSR0, in_be32(timer_baseaddr + TCSR0));
 }
 
 static irqreturn_t timer_interrupt(int irq, void *dev_id)
@@ -183,7 +180,7 @@ static __init void microblaze_clockevent_init(void)
 static cycle_t microblaze_read(struct clocksource *cs)
 {
 	/* reading actual value of timer 1 */
-	return (cycle_t) (in_be32(TIMER_BASE + TCR1));
+	return (cycle_t) (in_be32(timer_baseaddr + TCR1));
 }
 
 static struct timecounter microblaze_tc = {
@@ -225,9 +222,10 @@ static int __init microblaze_clocksource_init(void)
 		panic("failed to register clocksource");
 
 	/* stop timer1 */
-	out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT);
+	out_be32(timer_baseaddr + TCSR1,
+		 in_be32(timer_baseaddr + TCSR1) & ~TCSR_ENT);
 	/* start timer1 - up counting without interrupt */
-	out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT);
+	out_be32(timer_baseaddr + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT);
 
 	/* register timecounter - for ftrace support */
 	init_microblaze_timecounter();
@@ -246,17 +244,7 @@ void __init time_init(void)
 	u32 timer_num = 1;
 	struct device_node *timer = NULL;
 	const void *prop;
-#ifdef CONFIG_SELFMOD_TIMER
-	unsigned int timer_baseaddr = 0;
-	int arr_func[] = {
-				(int)&microblaze_read,
-				(int)&timer_interrupt,
-				(int)&microblaze_clocksource_init,
-				(int)&microblaze_timer_set_mode,
-				(int)&microblaze_timer_set_next_event,
-				0
-			};
-#endif
+
 	prop = of_get_property(of_chosen, "system-timer", NULL);
 	if (prop)
 		timer = of_find_node_by_phandle(be32_to_cpup(prop));
@@ -278,9 +266,6 @@ void __init time_init(void)
 		BUG();
 	}
 
-#ifdef CONFIG_SELFMOD_TIMER
-	selfmod_function((int *) arr_func, timer_baseaddr);
-#endif
 	pr_info("%s #0 at 0x%08x, irq=%d\n",
 		timer->name, timer_baseaddr, irq);
 

arch/microblaze/platform/Kconfig.platform

@@ -18,28 +18,6 @@ config PLATFORM_GENERIC
 
 endchoice
 
-config SELFMOD
-	bool "Use self modified code for intc/timer"
-	depends on NO_MMU
-	default n
-	help
-	  This choice enables self-modified code for interrupt controller
-	  and timer.
-
-config SELFMOD_INTC
-	bool "Use self modified code for intc"
-	depends on SELFMOD
-	default y
-	help
-	  This choice enables self-modified code for interrupt controller.
-
-config SELFMOD_TIMER
-	bool "Use self modified code for timer"
-	depends on SELFMOD
-	default y
-	help
-	  This choice enables self-modified code for timer.
-
 config OPT_LIB_FUNCTION
 	bool "Optimalized lib function"
 	default y