*/
#include <common.h>
+#include <dm.h>
#include <asm/cache.h>
#include <asm/control_regs.h>
#include <asm/interrupt.h>
#include <asm/processor-flags.h>
#include <linux/compiler.h>
#include <asm/msr.h>
+#include <asm/processor.h>
#include <asm/u-boot-x86.h>
#include <asm/i8259.h>
"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",
+ "General 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;
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
unsigned long d0, d1, d2, d3, d6, d7;
unsigned long sp;
+ /*
+ * Some exceptions cause an error code to be saved on the current stack
+ * after the EIP value. We should extract CS/EIP/EFLAGS from different
+ * position on the stack based on the exception number.
+ */
+ switch (regs->irq_id) {
+ case EXC_DF:
+ case EXC_TS:
+ case EXC_NP:
+ case EXC_SS:
+ case EXC_GP:
+ case EXC_PF:
+ case EXC_AC:
+ cs = regs->context.ctx2.xcs;
+ eip = regs->context.ctx2.eip;
+ eflags = regs->context.ctx2.eflags;
+ /* We should fix up the ESP due to error code */
+ regs->esp += 4;
+ break;
+ default:
+ cs = regs->context.ctx1.xcs;
+ eip = regs->context.ctx1.eip;
+ eflags = regs->context.ctx1.eflags;
+ break;
+ }
+
printf("EIP: %04x:[<%08lx>] EFLAGS: %08lx\n",
- (u16)regs->xcs, regs->eip, regs->eflags);
+ (u16)cs, eip, eflags);
+ if (gd->flags & GD_FLG_RELOC)
+ printf("Original EIP :[<%08lx>]\n", eip - gd->reloc_off);
printf("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
regs->eax, regs->ebx, regs->ecx, regs->edx);
}
}
+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;
struct desc_ptr {
unsigned short size;
unsigned long address;
- unsigned short segment;
} __packed;
struct idt_entry idt[256] __aligned(16);
for (i = 0; i < 256; i++) {
idt[i].access = 0x8e;
idt[i].res = 0;
- idt[i].selector = 0x10;
+ idt[i].selector = X86_GDT_ENTRY_32BIT_CS * X86_GDT_ENTRY_SIZE;
set_vector(i, irq_entry);
irq_entry += irq_entry_size;
}
- idt_ptr.size = 256 * 8;
+ idt_ptr.size = 256 * 8 - 1;
idt_ptr.address = (unsigned long) idt;
- idt_ptr.segment = 0x18;
load_idt(&idt_ptr);
int interrupt_init(void)
{
+ struct udevice *dev;
+ int ret;
+
+ /* Try to set up the interrupt router, but don't require one */
+ ret = uclass_first_device(UCLASS_IRQ, &dev);
+ if (ret && ret != -ENODEV)
+ return ret;
+
+ /*
+ * When running as an EFI application we are not in control of
+ * interrupts and should leave them alone.
+ */
+#ifndef CONFIG_EFI_APP
/* Just in case... */
disable_interrupts();
-#ifdef CONFIG_SYS_PCAT_INTERRUPTS
+#ifdef CONFIG_I8259_PIC
/* Initialize the master/slave i8259 pic */
i8259_init();
#endif
/* Initialize core interrupt and exception functionality of CPU */
cpu_init_interrupts();
- /* It is now safe to enable interrupts */
- enable_interrupts();
+ /*
+ * It is now safe to enable interrupts.
+ *
+ * TODO(sjg@chromium.org): But we don't handle these correctly when
+ * booted from EFI.
+ */
+ if (ll_boot_init())
+ enable_interrupts();
+#endif
return 0;
}
* 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);
}
projects / u-boot / blobdiff