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/*
* (C) Copyright 2008-2011
* Graeme Russ, <graeme.russ@gmail.com>
*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
* Portions of this file are derived from the Linux kernel source
* Copyright (C) 1991, 1992 Linus Torvalds
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/cache.h>
#include <asm/control_regs.h>
#include <asm/interrupt.h>
#include <asm/io.h>
#include <asm/processor-flags.h>
#include <linux/compiler.h>
#include <asm/msr.h>
#include <asm/u-boot-x86.h>
#define DECLARE_INTERRUPT(x) \
".globl irq_"#x"\n" \
".hidden irq_"#x"\n" \
".type irq_"#x", @function\n" \
"irq_"#x":\n" \
"pushl $"#x"\n" \
"jmp irq_common_entry\n"
void dump_regs(struct irq_regs *regs)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
unsigned long d0, d1, d2, d3, d6, d7;
unsigned long sp;
printf("EIP: %04x:[<%08lx>] EFLAGS: %08lx\n",
(u16)regs->xcs, regs->eip, regs->eflags);
printf("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
regs->eax, regs->ebx, regs->ecx, regs->edx);
printf("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
regs->esi, regs->edi, regs->ebp, regs->esp);
printf(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
(u16)regs->xds, (u16)regs->xes, (u16)regs->xfs,
(u16)regs->xgs, (u16)regs->xss);
cr0 = read_cr0();
cr2 = read_cr2();
cr3 = read_cr3();
cr4 = read_cr4();
printf("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n",
cr0, cr2, cr3, cr4);
d0 = get_debugreg(0);
d1 = get_debugreg(1);
d2 = get_debugreg(2);
d3 = get_debugreg(3);
printf("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",
d0, d1, d2, d3);
d6 = get_debugreg(6);
d7 = get_debugreg(7);
printf("DR6: %08lx DR7: %08lx\n",
d6, d7);
printf("Stack:\n");
sp = regs->esp;
sp += 64;
while (sp > (regs->esp - 16)) {
if (sp == regs->esp)
printf("--->");
else
printf(" ");
printf("0x%8.8lx : 0x%8.8lx\n", sp, (ulong)readl(sp));
sp -= 4;
}
}
struct idt_entry {
u16 base_low;
u16 selector;
u8 res;
u8 access;
u16 base_high;
} __packed;
struct desc_ptr {
unsigned short size;
unsigned long address;
unsigned short segment;
} __packed;
struct idt_entry idt[256] __aligned(16);
struct desc_ptr idt_ptr;
static inline void load_idt(const struct desc_ptr *dtr)
{
asm volatile("cs lidt %0" : : "m" (*dtr));
}
void set_vector(u8 intnum, void *routine)
{
idt[intnum].base_high = (u16)((u32)(routine) >> 16);
idt[intnum].base_low = (u16)((u32)(routine) & 0xffff);
}
/*
* Ideally these would be defined static to avoid a checkpatch warning, but
* the compiler cannot see them in the inline asm and complains that they
* aren't defined
*/
void irq_0(void);
void irq_1(void);
int cpu_init_interrupts(void)
{
int i;
int irq_entry_size = irq_1 - irq_0;
void *irq_entry = (void *)irq_0;
/* Just in case... */
disable_interrupts();
/* Setup the IDT */
for (i = 0; i < 256; i++) {
idt[i].access = 0x8e;
idt[i].res = 0;
idt[i].selector = 0x10;
set_vector(i, irq_entry);
irq_entry += irq_entry_size;
}
idt_ptr.size = 256 * 8;
idt_ptr.address = (unsigned long) idt;
idt_ptr.segment = 0x18;
load_idt(&idt_ptr);
/* It is now safe to enable interrupts */
enable_interrupts();
return 0;
}
void __do_irq(int irq)
{
printf("Unhandled IRQ : %d\n", irq);
}
void do_irq(int irq) __attribute__((weak, alias("__do_irq")));
void enable_interrupts(void)
{
asm("sti\n");
}
int disable_interrupts(void)
{
long flags;
asm volatile ("pushfl ; popl %0 ; cli\n" : "=g" (flags) : );
return flags & X86_EFLAGS_IF;
}
/* IRQ Low-Level Service Routine */
void irq_llsr(struct irq_regs *regs)
{
/*
* For detailed description of each exception, refer to:
* Intel® 64 and IA-32 Architectures Software Developer's Manual
* Volume 1: Basic Architecture
* 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:
/* Hardware or User IRQ */
do_irq(regs->irq_id);
}
}
/*
* OK - This looks really horrible, but it serves a purpose - It helps create
* fully relocatable code.
* - The call to irq_llsr will be a relative jump
* - The IRQ entries will be guaranteed to be in order
* Interrupt entries are now very small (a push and a jump) but they are
* now slower (all registers pushed on stack which provides complete
* crash dumps in the low level handlers
*
* Interrupt Entry Point:
* - Interrupt has caused eflags, CS and EIP to be pushed
* - Interrupt Vector Handler has pushed orig_eax
* - pt_regs.esp needs to be adjusted by 40 bytes:
* 12 bytes pushed by CPU (EFLAGSF, CS, EIP)
* 4 bytes pushed by vector handler (irq_id)
* 24 bytes pushed before SP (SS, GS, FS, ES, DS, EAX)
* NOTE: Only longs are pushed on/popped off the stack!
*/
asm(".globl irq_common_entry\n" \
".hidden irq_common_entry\n" \
".type irq_common_entry, @function\n" \
"irq_common_entry:\n" \
"cld\n" \
"pushl %ss\n" \
"pushl %gs\n" \
"pushl %fs\n" \
"pushl %es\n" \
"pushl %ds\n" \
"pushl %eax\n" \
"movl %esp, %eax\n" \
"addl $40, %eax\n" \
"pushl %eax\n" \
"pushl %ebp\n" \
"pushl %edi\n" \
"pushl %esi\n" \
"pushl %edx\n" \
"pushl %ecx\n" \
"pushl %ebx\n" \
"mov %esp, %eax\n" \
"call irq_llsr\n" \
"popl %ebx\n" \
"popl %ecx\n" \
"popl %edx\n" \
"popl %esi\n" \
"popl %edi\n" \
"popl %ebp\n" \
"popl %eax\n" \
"popl %eax\n" \
"popl %ds\n" \
"popl %es\n" \
"popl %fs\n" \
"popl %gs\n" \
"popl %ss\n" \
"add $4, %esp\n" \
"iret\n" \
DECLARE_INTERRUPT(0) \
DECLARE_INTERRUPT(1) \
DECLARE_INTERRUPT(2) \
DECLARE_INTERRUPT(3) \
DECLARE_INTERRUPT(4) \
DECLARE_INTERRUPT(5) \
DECLARE_INTERRUPT(6) \
DECLARE_INTERRUPT(7) \
DECLARE_INTERRUPT(8) \
DECLARE_INTERRUPT(9) \
DECLARE_INTERRUPT(10) \
DECLARE_INTERRUPT(11) \
DECLARE_INTERRUPT(12) \
DECLARE_INTERRUPT(13) \
DECLARE_INTERRUPT(14) \
DECLARE_INTERRUPT(15) \
DECLARE_INTERRUPT(16) \
DECLARE_INTERRUPT(17) \
DECLARE_INTERRUPT(18) \
DECLARE_INTERRUPT(19) \
DECLARE_INTERRUPT(20) \
DECLARE_INTERRUPT(21) \
DECLARE_INTERRUPT(22) \
DECLARE_INTERRUPT(23) \
DECLARE_INTERRUPT(24) \
DECLARE_INTERRUPT(25) \
DECLARE_INTERRUPT(26) \
DECLARE_INTERRUPT(27) \
DECLARE_INTERRUPT(28) \
DECLARE_INTERRUPT(29) \
DECLARE_INTERRUPT(30) \
DECLARE_INTERRUPT(31) \
DECLARE_INTERRUPT(32) \
DECLARE_INTERRUPT(33) \
DECLARE_INTERRUPT(34) \
DECLARE_INTERRUPT(35) \
DECLARE_INTERRUPT(36) \
DECLARE_INTERRUPT(37) \
DECLARE_INTERRUPT(38) \
DECLARE_INTERRUPT(39) \
DECLARE_INTERRUPT(40) \
DECLARE_INTERRUPT(41) \
DECLARE_INTERRUPT(42) \
DECLARE_INTERRUPT(43) \
DECLARE_INTERRUPT(44) \
DECLARE_INTERRUPT(45) \
DECLARE_INTERRUPT(46) \
DECLARE_INTERRUPT(47) \
DECLARE_INTERRUPT(48) \
DECLARE_INTERRUPT(49) \
DECLARE_INTERRUPT(50) \
DECLARE_INTERRUPT(51) \
DECLARE_INTERRUPT(52) \
DECLARE_INTERRUPT(53) \
DECLARE_INTERRUPT(54) \
DECLARE_INTERRUPT(55) \
DECLARE_INTERRUPT(56) \
DECLARE_INTERRUPT(57) \
DECLARE_INTERRUPT(58) \
DECLARE_INTERRUPT(59) \
DECLARE_INTERRUPT(60) \
DECLARE_INTERRUPT(61) \
DECLARE_INTERRUPT(62) \
DECLARE_INTERRUPT(63) \
DECLARE_INTERRUPT(64) \
DECLARE_INTERRUPT(65) \
DECLARE_INTERRUPT(66) \
DECLARE_INTERRUPT(67) \
DECLARE_INTERRUPT(68) \
DECLARE_INTERRUPT(69) \
DECLARE_INTERRUPT(70) \
DECLARE_INTERRUPT(71) \
DECLARE_INTERRUPT(72) \
DECLARE_INTERRUPT(73) \
DECLARE_INTERRUPT(74) \
DECLARE_INTERRUPT(75) \
DECLARE_INTERRUPT(76) \
DECLARE_INTERRUPT(77) \
DECLARE_INTERRUPT(78) \
DECLARE_INTERRUPT(79) \
DECLARE_INTERRUPT(80) \
DECLARE_INTERRUPT(81) \
DECLARE_INTERRUPT(82) \
DECLARE_INTERRUPT(83) \
DECLARE_INTERRUPT(84) \
DECLARE_INTERRUPT(85) \
DECLARE_INTERRUPT(86) \
DECLARE_INTERRUPT(87) \
DECLARE_INTERRUPT(88) \
DECLARE_INTERRUPT(89) \
DECLARE_INTERRUPT(90) \
DECLARE_INTERRUPT(91) \
DECLARE_INTERRUPT(92) \
DECLARE_INTERRUPT(93) \
DECLARE_INTERRUPT(94) \
DECLARE_INTERRUPT(95) \
DECLARE_INTERRUPT(97) \
DECLARE_INTERRUPT(96) \
DECLARE_INTERRUPT(98) \
DECLARE_INTERRUPT(99) \
DECLARE_INTERRUPT(100) \
DECLARE_INTERRUPT(101) \
DECLARE_INTERRUPT(102) \
DECLARE_INTERRUPT(103) \
DECLARE_INTERRUPT(104) \
DECLARE_INTERRUPT(105) \
DECLARE_INTERRUPT(106) \
DECLARE_INTERRUPT(107) \
DECLARE_INTERRUPT(108) \
DECLARE_INTERRUPT(109) \
DECLARE_INTERRUPT(110) \
DECLARE_INTERRUPT(111) \
DECLARE_INTERRUPT(112) \
DECLARE_INTERRUPT(113) \
DECLARE_INTERRUPT(114) \
DECLARE_INTERRUPT(115) \
DECLARE_INTERRUPT(116) \
DECLARE_INTERRUPT(117) \
DECLARE_INTERRUPT(118) \
DECLARE_INTERRUPT(119) \
DECLARE_INTERRUPT(120) \
DECLARE_INTERRUPT(121) \
DECLARE_INTERRUPT(122) \
DECLARE_INTERRUPT(123) \
DECLARE_INTERRUPT(124) \
DECLARE_INTERRUPT(125) \
DECLARE_INTERRUPT(126) \
DECLARE_INTERRUPT(127) \
DECLARE_INTERRUPT(128) \
DECLARE_INTERRUPT(129) \
DECLARE_INTERRUPT(130) \
DECLARE_INTERRUPT(131) \
DECLARE_INTERRUPT(132) \
DECLARE_INTERRUPT(133) \
DECLARE_INTERRUPT(134) \
DECLARE_INTERRUPT(135) \
DECLARE_INTERRUPT(136) \
DECLARE_INTERRUPT(137) \
DECLARE_INTERRUPT(138) \
DECLARE_INTERRUPT(139) \
DECLARE_INTERRUPT(140) \
DECLARE_INTERRUPT(141) \
DECLARE_INTERRUPT(142) \
DECLARE_INTERRUPT(143) \
DECLARE_INTERRUPT(144) \
DECLARE_INTERRUPT(145) \
DECLARE_INTERRUPT(146) \
DECLARE_INTERRUPT(147) \
DECLARE_INTERRUPT(148) \
DECLARE_INTERRUPT(149) \
DECLARE_INTERRUPT(150) \
DECLARE_INTERRUPT(151) \
DECLARE_INTERRUPT(152) \
DECLARE_INTERRUPT(153) \
DECLARE_INTERRUPT(154) \
DECLARE_INTERRUPT(155) \
DECLARE_INTERRUPT(156) \
DECLARE_INTERRUPT(157) \
DECLARE_INTERRUPT(158) \
DECLARE_INTERRUPT(159) \
DECLARE_INTERRUPT(160) \
DECLARE_INTERRUPT(161) \
DECLARE_INTERRUPT(162) \
DECLARE_INTERRUPT(163) \
DECLARE_INTERRUPT(164) \
DECLARE_INTERRUPT(165) \
DECLARE_INTERRUPT(166) \
DECLARE_INTERRUPT(167) \
DECLARE_INTERRUPT(168) \
DECLARE_INTERRUPT(169) \
DECLARE_INTERRUPT(170) \
DECLARE_INTERRUPT(171) \
DECLARE_INTERRUPT(172) \
DECLARE_INTERRUPT(173) \
DECLARE_INTERRUPT(174) \
DECLARE_INTERRUPT(175) \
DECLARE_INTERRUPT(176) \
DECLARE_INTERRUPT(177) \
DECLARE_INTERRUPT(178) \
DECLARE_INTERRUPT(179) \
DECLARE_INTERRUPT(180) \
DECLARE_INTERRUPT(181) \
DECLARE_INTERRUPT(182) \
DECLARE_INTERRUPT(183) \
DECLARE_INTERRUPT(184) \
DECLARE_INTERRUPT(185) \
DECLARE_INTERRUPT(186) \
DECLARE_INTERRUPT(187) \
DECLARE_INTERRUPT(188) \
DECLARE_INTERRUPT(189) \
DECLARE_INTERRUPT(190) \
DECLARE_INTERRUPT(191) \
DECLARE_INTERRUPT(192) \
DECLARE_INTERRUPT(193) \
DECLARE_INTERRUPT(194) \
DECLARE_INTERRUPT(195) \
DECLARE_INTERRUPT(196) \
DECLARE_INTERRUPT(197) \
DECLARE_INTERRUPT(198) \
DECLARE_INTERRUPT(199) \
DECLARE_INTERRUPT(200) \
DECLARE_INTERRUPT(201) \
DECLARE_INTERRUPT(202) \
DECLARE_INTERRUPT(203) \
DECLARE_INTERRUPT(204) \
DECLARE_INTERRUPT(205) \
DECLARE_INTERRUPT(206) \
DECLARE_INTERRUPT(207) \
DECLARE_INTERRUPT(208) \
DECLARE_INTERRUPT(209) \
DECLARE_INTERRUPT(210) \
DECLARE_INTERRUPT(211) \
DECLARE_INTERRUPT(212) \
DECLARE_INTERRUPT(213) \
DECLARE_INTERRUPT(214) \
DECLARE_INTERRUPT(215) \
DECLARE_INTERRUPT(216) \
DECLARE_INTERRUPT(217) \
DECLARE_INTERRUPT(218) \
DECLARE_INTERRUPT(219) \
DECLARE_INTERRUPT(220) \
DECLARE_INTERRUPT(221) \
DECLARE_INTERRUPT(222) \
DECLARE_INTERRUPT(223) \
DECLARE_INTERRUPT(224) \
DECLARE_INTERRUPT(225) \
DECLARE_INTERRUPT(226) \
DECLARE_INTERRUPT(227) \
DECLARE_INTERRUPT(228) \
DECLARE_INTERRUPT(229) \
DECLARE_INTERRUPT(230) \
DECLARE_INTERRUPT(231) \
DECLARE_INTERRUPT(232) \
DECLARE_INTERRUPT(233) \
DECLARE_INTERRUPT(234) \
DECLARE_INTERRUPT(235) \
DECLARE_INTERRUPT(236) \
DECLARE_INTERRUPT(237) \
DECLARE_INTERRUPT(238) \
DECLARE_INTERRUPT(239) \
DECLARE_INTERRUPT(240) \
DECLARE_INTERRUPT(241) \
DECLARE_INTERRUPT(242) \
DECLARE_INTERRUPT(243) \
DECLARE_INTERRUPT(244) \
DECLARE_INTERRUPT(245) \
DECLARE_INTERRUPT(246) \
DECLARE_INTERRUPT(247) \
DECLARE_INTERRUPT(248) \
DECLARE_INTERRUPT(249) \
DECLARE_INTERRUPT(250) \
DECLARE_INTERRUPT(251) \
DECLARE_INTERRUPT(252) \
DECLARE_INTERRUPT(253) \
DECLARE_INTERRUPT(254) \
DECLARE_INTERRUPT(255));
#if defined(CONFIG_INTEL_CORE_ARCH)
/*
* Get the number of CPU time counter ticks since it was read first time after
* restart. This yields a free running counter guaranteed to take almost 6
* years to wrap around even at 100GHz clock rate.
*/
u64 get_ticks(void)
{
static u64 tick_base;
u64 now_tick = rdtsc();
if (!tick_base)
tick_base = now_tick;
return now_tick - tick_base;
}
#define PLATFORM_INFO_MSR 0xce
unsigned long get_tbclk(void)
{
u32 ratio;
u64 platform_info = native_read_msr(PLATFORM_INFO_MSR);
ratio = (platform_info >> 8) & 0xff;
return 100 * 1000 * 1000 * ratio; /* 100MHz times Max Non Turbo ratio */
}
#endif
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