Blackfin: drop unused irq_panic()/DEBUG_ICACHE_CHECK
This code was useful during early port development when our icache code
wasn't solid, but that ship has sailed long ago, and no code calls this
function anymore (irq_panic). So punt it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
index d1825cb..acb8379 100644
--- a/arch/blackfin/Kconfig.debug
+++ b/arch/blackfin/Kconfig.debug
@@ -102,17 +102,6 @@
endchoice
-config DEBUG_ICACHE_CHECK
- bool "Check Instruction cache coherency"
- depends on DEBUG_KERNEL
- depends on DEBUG_HWERR
- help
- Say Y here if you are getting weird unexplained errors. This will
- ensure that icache is what SDRAM says it should be by doing a
- byte wise comparison between SDRAM and instruction cache. This
- also relocates the irq_panic() function to L1 memory, (which is
- un-cached).
-
config DEBUG_HUNT_FOR_ZERO
bool "Catch NULL pointer reads/writes"
default y
diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile
index 814cb48..ff299f2 100644
--- a/arch/blackfin/mach-common/Makefile
+++ b/arch/blackfin/mach-common/Makefile
@@ -11,4 +11,3 @@
obj-$(CONFIG_CPU_VOLTAGE) += dpmc.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_BFIN_KERNEL_CLOCK) += clocks-init.o
-obj-$(CONFIG_DEBUG_ICACHE_CHECK) += irqpanic.o
diff --git a/arch/blackfin/mach-common/irqpanic.c b/arch/blackfin/mach-common/irqpanic.c
deleted file mode 100644
index c6496249..0000000
--- a/arch/blackfin/mach-common/irqpanic.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * panic kernel with dump information
- *
- * Copyright 2005-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/module.h>
-#include <linux/kernel_stat.h>
-#include <linux/sched.h>
-#include <asm/blackfin.h>
-
-#define L1_ICACHE_START 0xffa10000
-#define L1_ICACHE_END 0xffa13fff
-
-/*
- * irq_panic - calls panic with string setup
- */
-__attribute__ ((l1_text))
-asmlinkage void irq_panic(int reason, struct pt_regs *regs)
-{
- unsigned int cmd, tag, ca, cache_hi, cache_lo, *pa;
- unsigned short i, j, die;
- unsigned int bad[10][6];
-
- /* check entire cache for coherency
- * Since printk is in cacheable memory,
- * don't call it until you have checked everything
- */
-
- die = 0;
- i = 0;
-
- /* check icache */
-
- for (ca = L1_ICACHE_START; ca <= L1_ICACHE_END && i < 10; ca += 32) {
-
- /* Grab various address bits for the itest_cmd fields */
- cmd = (((ca & 0x3000) << 4) | /* ca[13:12] for SBNK[1:0] */
- ((ca & 0x0c00) << 16) | /* ca[11:10] for WAYSEL[1:0] */
- ((ca & 0x3f8)) | /* ca[09:03] for SET[4:0] and DW[1:0] */
- 0); /* Access Tag, Read access */
-
- SSYNC();
- bfin_write_ITEST_COMMAND(cmd);
- SSYNC();
- tag = bfin_read_ITEST_DATA0();
- SSYNC();
-
- /* if tag is marked as valid, check it */
- if (tag & 1) {
- /* The icache is arranged in 4 groups of 64-bits */
- for (j = 0; j < 32; j += 8) {
- cmd = ((((ca + j) & 0x3000) << 4) | /* ca[13:12] for SBNK[1:0] */
- (((ca + j) & 0x0c00) << 16) | /* ca[11:10] for WAYSEL[1:0] */
- (((ca + j) & 0x3f8)) | /* ca[09:03] for SET[4:0] and DW[1:0] */
- 4); /* Access Data, Read access */
-
- SSYNC();
- bfin_write_ITEST_COMMAND(cmd);
- SSYNC();
-
- cache_hi = bfin_read_ITEST_DATA1();
- cache_lo = bfin_read_ITEST_DATA0();
-
- pa = ((unsigned int *)((tag & 0xffffcc00) |
- ((ca + j) & ~(0xffffcc00))));
-
- /*
- * Debugging this, enable
- *
- * printk("addr: %08x %08x%08x | %08x%08x\n",
- * ((unsigned int *)((tag & 0xffffcc00) | ((ca+j) & ~(0xffffcc00)))),
- * cache_hi, cache_lo, *(pa+1), *pa);
- */
-
- if (cache_hi != *(pa + 1) || cache_lo != *pa) {
- /* Since icache is not working, stay out of it, by not printing */
- die = 1;
- bad[i][0] = (ca + j);
- bad[i][1] = cache_hi;
- bad[i][2] = cache_lo;
- bad[i][3] = ((tag & 0xffffcc00) |
- ((ca + j) & ~(0xffffcc00)));
- bad[i][4] = *(pa + 1);
- bad[i][5] = *(pa);
- i++;
- }
- }
- }
- }
- if (die) {
- printk(KERN_EMERG "icache coherency error\n");
- for (j = 0; j <= i; j++) {
- printk(KERN_EMERG
- "cache address : %08x cache value : %08x%08x\n",
- bad[j][0], bad[j][1], bad[j][2]);
- printk(KERN_EMERG
- "physical address: %08x SDRAM value : %08x%08x\n",
- bad[j][3], bad[j][4], bad[j][5]);
- }
- panic("icache coherency error");
- } else
- printk(KERN_EMERG "icache checked, and OK\n");
-}