waterDataStatisticsCrossAssociation memoryDefinitionWaterRelatedData.c 李欣儒 commit at 2020-09-11

waterDataStatisticsCrossAssociation/dataSharedMemory/memoryDefinitionWaterRelatedData.c

@@ -0,0 +1,136 @@
+/*
+ * Main exception handling logic.
+ *
+ * Copyright 2004-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/bug.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <asm/traps.h>
+#include <asm/cplb.h>
+#include <asm/blackfin.h>
+#include <asm/irq_handler.h>
+#include <linux/irq.h>
+#include <asm/trace.h>
+#include <asm/fixed_code.h>
+#include <asm/pseudo_instructions.h>
+#include <asm/pda.h>
+
+#ifdef CONFIG_KGDB
+# include <linux/kgdb.h>
+
+# define CHK_DEBUGGER_TRAP() \
+	do { \
+		kgdb_handle_exception(trapnr, sig, info.si_code, fp); \
+	} while (0)
+# define CHK_DEBUGGER_TRAP_MAYBE() \
+	do { \
+		if (kgdb_connected) \
+			CHK_DEBUGGER_TRAP(); \
+	} while (0)
+#else
+# define CHK_DEBUGGER_TRAP() do { } while (0)
+# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
+#endif
+
+
+#ifdef CONFIG_DEBUG_VERBOSE
+#define verbose_printk(fmt, arg...) \
+	printk(fmt, ##arg)
+#else
+#define verbose_printk(fmt, arg...) \
+	({ if (0) printk(fmt, ##arg); 0; })
+#endif
+
+#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE)
+u32 last_seqstat;
+#ifdef CONFIG_DEBUG_MMRS_MODULE
+EXPORT_SYMBOL(last_seqstat);
+#endif
+#endif
+
+/* Initiate the event table handler */
+void __init trap_init(void)
+{
+	CSYNC();
+	bfin_write_EVT3(trap);
+	CSYNC();
+}
+
+static int kernel_mode_regs(struct pt_regs *regs)
+{
+	return regs->ipend & 0xffc0;
+}
+
+asmlinkage notrace void trap_c(struct pt_regs *fp)
+{
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+	int j;
+#endif
+#ifdef CONFIG_BFIN_PSEUDODBG_INSNS
+	int opcode;
+#endif
+	unsigned int cpu = raw_smp_processor_id();
+	const char *strerror = NULL;
+	int sig = 0;
+	siginfo_t info;
+	unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
+
+	trace_buffer_save(j);
+#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE)
+	last_seqstat = (u32)fp->seqstat;
+#endif
+
+	/* Important - be very careful dereferncing pointers - will lead to
+	 * double faults if the stack has become corrupt
+	 */
+
+	/* trap_c() will be called for exceptions. During exceptions
+	 * processing, the pc value should be set with retx value.
+	 * With this change we can cleanup some code in signal.c- TODO
+	 */
+	fp->orig_pc = fp->retx;
+	/* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
+		trapnr, fp->ipend, fp->pc, fp->retx); */
+
+	/* send the appropriate signal to the user program */
+	switch (trapnr) {
+
+	/* This table works in conjunction with the one in ./mach-common/entry.S
+	 * Some exceptions are handled there (in assembly, in exception space)
+	 * Some are handled here, (in C, in interrupt space)
+	 * Some, like CPLB, are handled in both, where the normal path is
+	 * handled in assembly/exception space, and the error path is handled
+	 * here
+	 */
+
+	/* 0x00 - Linux Syscall, getting here is an error */
+	/* 0x01 - userspace gdb breakpoint, handled here */
+	case VEC_EXCPT01:
+		info.si_code = TRAP_ILLTRAP;
+		sig = SIGTRAP;
+		CHK_DEBUGGER_TRAP_MAYBE();
+		/* Check if this is a breakpoint in kernel space */
+		if (kernel_mode_regs(fp))
+			goto traps_done;
+		else
+			break;
+	/* 0x03 - User Defined, userspace stack overflow */
+	case VEC_EXCPT03:
+		info.si_code = SEGV_STACKFLOW;
+		sig = SIGSEGV;
+		strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE);
+		CHK_DEBUGGER_TRAP_MAYBE();
+		break;
+	/* 0x02 - KGDB initial connection and break signal trap */
+	case VEC_EXCPT02:
+#ifdef CONFIG_KGDB
+		info.si_code = TRAP_ILLTRAP;
+		sig = SIGTRAP;
+		CHK_DEBUGGER_TRAP();
+		goto traps_done;
+#endif
+	/* 0x04 - User Defined */