leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

x86: Simplify architecture defined exception handling in irq_llsr()

Browse Source 
Instead of using switch..case for architecture defined exceptions,
simply unify the handling by printing a message of exception name,
followed by registers dump then halt the CPU.

With this unification, it also fixes the wrong exception numbers
for #MF/#AC/#MC/#XM which should be 16/17/18/19 not 15/16/17/18.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-07-10 10:51:23 +08:00 committed by Simon Glass
parent 013cf483c9
commit 3ccd49cab4
1 changed files with 46 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

151
arch/x86/cpu/interrupts.c
View File

@ -32,6 +32,41 @@ DECLARE_GLOBAL_DATA_PTR;
"pushl $"#x"\n" \
"jmp irq_common_entry\n"
static char *exceptions[] = {
"Divide Error",
"Debug",
"NMI Interrupt",
"Breakpoint",
"Overflow",
"BOUND Range Exceeded",
"Invalid Opcode (Undefined Opcode)",
"Device Not Avaiable (No Math Coprocessor)",
"Double Fault",
"Coprocessor Segment Overrun",
"Invalid TSS",
"Segment Not Present",
"Stack Segment Fault",
"Gerneral Protection",
"Page Fault",
"Reserved",
"x87 FPU Floating-Point Error",
"Alignment Check",
"Machine Check",
"SIMD Floating-Point Exception",
"Virtualization Exception",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved"
};
static void dump_regs(struct irq_regs *regs)
{
unsigned long cs, eip, eflags;
@ -112,6 +147,13 @@ static void dump_regs(struct irq_regs *regs)
}
}
static void do_exception(struct irq_regs *regs)
{
printf("%s\n", exceptions[regs->irq_id]);
dump_regs(regs);
hang();
}
struct idt_entry {
u16 base_low;
u16 selector;
@ -228,111 +270,10 @@ void irq_llsr(struct irq_regs *regs)
* Order Number: 253665-029US, November 2008
* Table 6-1. Exceptions and Interrupts
*/
switch (regs->irq_id) {
case 0x00:
printf("Divide Error (Division by zero)\n");
dump_regs(regs);
hang();
break;
case 0x01:
printf("Debug Interrupt (Single step)\n");
dump_regs(regs);
break;
case 0x02:
printf("NMI Interrupt\n");
dump_regs(regs);
break;
case 0x03:
printf("Breakpoint\n");
dump_regs(regs);
break;
case 0x04:
printf("Overflow\n");
dump_regs(regs);
hang();
break;
case 0x05:
printf("BOUND Range Exceeded\n");
dump_regs(regs);
hang();
break;
case 0x06:
printf("Invalid Opcode (UnDefined Opcode)\n");
dump_regs(regs);
hang();
break;
case 0x07:
printf("Device Not Available (No Math Coprocessor)\n");
dump_regs(regs);
hang();
break;
case 0x08:
printf("Double fault\n");
dump_regs(regs);
hang();
break;
case 0x09:
printf("Co-processor segment overrun\n");
dump_regs(regs);
hang();
break;
case 0x0a:
printf("Invalid TSS\n");
dump_regs(regs);
break;
case 0x0b:
printf("Segment Not Present\n");
dump_regs(regs);
hang();
break;
case 0x0c:
printf("Stack Segment Fault\n");
dump_regs(regs);
hang();
break;
case 0x0d:
printf("General Protection\n");
dump_regs(regs);
break;
case 0x0e:
printf("Page fault\n");
dump_regs(regs);
hang();
break;
case 0x0f:
printf("Floating-Point Error (Math Fault)\n");
dump_regs(regs);
break;
case 0x10:
printf("Alignment check\n");
dump_regs(regs);
break;
case 0x11:
printf("Machine Check\n");
dump_regs(regs);
break;
case 0x12:
printf("SIMD Floating-Point Exception\n");
dump_regs(regs);
break;
case 0x13:
case 0x14:
case 0x15:
case 0x16:
case 0x17:
case 0x18:
case 0x19:
case 0x1a:
case 0x1b:
case 0x1c:
case 0x1d:
case 0x1e:
case 0x1f:
printf("Reserved Exception\n");
dump_regs(regs);
break;
default:
if (regs->irq_id < 32) {
/* Architecture defined exception */
do_exception(regs);
} else {
/* Hardware or User IRQ */
do_irq(regs->irq_id);
}