e4bc1a1e8c
The x86/init/common/ folder holds all cpu initialization code - idt and gdt setup, interrupts and cpu initialization. On this folder will also sit any SoC specific implementation of the functions called from cpu_init().
110 lines
4.9 KiB
C
110 lines
4.9 KiB
C
/*
|
|
* Copyright (C) 2015, Intel Corporation. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef INTERRUPT_H
|
|
#define INTERRUPT_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "idt.h"
|
|
|
|
struct interrupt_context {
|
|
uint32_t edi;
|
|
uint32_t esi;
|
|
uint32_t ebp;
|
|
uint32_t esp;
|
|
uint32_t ebx;
|
|
uint32_t edx;
|
|
uint32_t ecx;
|
|
uint32_t eax;
|
|
uint32_t error_code;
|
|
uint32_t eip;
|
|
};
|
|
|
|
/* Helper macro to register interrupt handler function.
|
|
*
|
|
* num: Interrupt number (0-255)
|
|
* has_error_code: 0 if interrupt doesn't push error code onto the
|
|
* stack. Otherwise, set this argument to 1.
|
|
* handler: Pointer to function that should be called once the
|
|
* interrupt is raised. In case has_error_code == 0
|
|
* the function prototype should be the following:
|
|
* void handler(void)
|
|
* Otherwise, it should be:
|
|
* void handler(struct interrupt_context context)
|
|
*
|
|
* Since there is no easy way to write an Interrupt Service Routines
|
|
* (ISR) in C (for further information on this, see [1]), we provide
|
|
* this helper macro. It basically provides an assembly trampoline
|
|
* to a C function (handler parameter) which, indeed, handles the
|
|
* interrupt.
|
|
*
|
|
* [1] http://wiki.osdev.org/Interrupt_Service_Routines
|
|
*
|
|
* XXX: If you are debugging at assembly level, make sure you don't be misled
|
|
* by the "trampolineXX" symbol name. The suffix number is NOT related to the
|
|
* interrupt number at all. The suffix number is a unique random number to
|
|
* guarantee there is no symbol name clashing.
|
|
*/
|
|
#define SET_INTERRUPT_HANDLER(num, has_error_code, handler) \
|
|
do { \
|
|
__asm__ __volatile__ ( \
|
|
"push $trampoline%=\n\t" \
|
|
"push %0\n\t" \
|
|
"call %P1\n\t" \
|
|
"add $8, %%esp\n\t" \
|
|
"jmp skip_trampoline%=\n\t" \
|
|
".align 4\n\t" \
|
|
"trampoline%=:\n\t" \
|
|
" pushal\n\t" \
|
|
" call %P2\n\t" \
|
|
" popal\n\t" \
|
|
" .if " #has_error_code "\n\t" \
|
|
" add $4, %%esp\n\t" \
|
|
" .endif\n\t" \
|
|
" iret\n\t" \
|
|
"skip_trampoline%=:\n\t" \
|
|
:: "g" (num), "i" (idt_set_intr_gate_desc), "i" (handler) \
|
|
); \
|
|
} while (0)
|
|
|
|
/* Disable maskable hardware interrupts */
|
|
#define DISABLE_IRQ() \
|
|
do { \
|
|
__asm__ ("cli"); \
|
|
} while (0)
|
|
|
|
/* Enable maskable hardware interrupts */
|
|
#define ENABLE_IRQ() \
|
|
do { \
|
|
__asm__ ("sti"); \
|
|
} while (0)
|
|
|
|
#endif /* INTERRUPT_H */
|