mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-11 00:46:49 +00:00
88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
#include "pci_irq.h"
|
||
#include "exception/irq.h"
|
||
#include <common/errno.h>
|
||
#include <common/kprint.h>
|
||
// 现在pci设备的中断由自己进行控制，这些不执行内容的函数是为了适配旧的中断处理机制
|
||
void pci_irq_enable(ul irq_num)
|
||
{
|
||
|
||
}
|
||
void pci_irq_disable(ul irq_num)
|
||
{
|
||
|
||
}
|
||
void pci_irq_install(ul irq_num)
|
||
{
|
||
|
||
}
|
||
void pci_irq_uninstall(ul irq_num)
|
||
{
|
||
|
||
}
|
||
/// @brief 与本操作系统的中断机制进行交互，把中断处理函数等注册到中断结构体中（被rust调用）
|
||
/// @param irq_num 要进行注册的中断号
|
||
/// @param pci_irq_handler 对应的中断处理函数
|
||
/// @param parameter 中断处理函数传入参数
|
||
/// @param irq_name 中断名字
|
||
/// @param pci_irq_ack 对于中断的回复，为NULL时会使用默认回应
|
||
uint16_t c_irq_install(ul irq_num,void (*pci_irq_handler)(ul irq_num, ul parameter, struct pt_regs *regs),ul parameter,const char *irq_name,void (*pci_irq_ack)(ul irq_num))
|
||
{
|
||
// 由于为I/O APIC分配的中断向量号是从32开始的，因此要减去32才是对应的interrupt_desc的元素
|
||
irq_desc_t *p = NULL;
|
||
if (irq_num >= 32 && irq_num < 0x80)
|
||
p = &interrupt_desc[irq_num - 32];
|
||
else if (irq_num >= 150 && irq_num < 200)
|
||
p = &local_apic_interrupt_desc[irq_num - 150];
|
||
else
|
||
{
|
||
//kerror("irq install for pci irq: invalid irq num: %ld.", irq_num);
|
||
return EINVAL;
|
||
}
|
||
if(p->irq_name!=NULL)
|
||
{
|
||
return EAGAIN;
|
||
}
|
||
hardware_intr_controller* pci_interrupt_controller = kmalloc(sizeof(hardware_intr_controller),0);
|
||
pci_interrupt_controller->enable = pci_irq_enable;
|
||
pci_interrupt_controller->disable = pci_irq_disable;
|
||
pci_interrupt_controller->install= pci_irq_install;
|
||
pci_interrupt_controller->uninstall= pci_irq_uninstall;
|
||
if(pci_irq_ack)
|
||
pci_interrupt_controller->ack = pci_irq_ack;
|
||
int namelen = sizeof(strlen(irq_name) + 1);
|
||
p->irq_name = (char *)kmalloc(namelen, 0);
|
||
memset(p->irq_name, 0, namelen);
|
||
strncpy(p->irq_name, irq_name, namelen);
|
||
p->parameter = parameter;
|
||
p->flags = 0;
|
||
p->handler = pci_irq_handler;
|
||
return 0;
|
||
};
|
||
|
||
/// @brief 与本操作系统的中断机制进行交互，把中断处理函数等从中断结构体中移除，需要释放空间的进行空间的释放
|
||
/// @param irq_num 要进行注销的中断号
|
||
void c_irq_uninstall(ul irq_num)
|
||
{
|
||
// 由于为I/O APIC分配的中断向量号是从32开始的，因此要减去32才是对应的interrupt_desc的元素
|
||
irq_desc_t *p = NULL;
|
||
if (irq_num >= 32 && irq_num < 0x80)
|
||
p = &interrupt_desc[irq_num - 32];
|
||
else if (irq_num >= 150 && irq_num < 200)
|
||
p = &local_apic_interrupt_desc[irq_num - 150];
|
||
else
|
||
{
|
||
kerror("irq install for pci irq: invalid irq num: %ld.", irq_num);
|
||
}
|
||
if(p->irq_name!=NULL)
|
||
{
|
||
kfree(p->irq_name);
|
||
p->irq_name = NULL;
|
||
}
|
||
if(p->controller!=NULL)
|
||
{
|
||
kfree(p->controller);
|
||
p->controller = NULL;
|
||
}
|
||
p->parameter = 0;
|
||
p->handler = NULL;
|
||
} |