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88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
#include "pci_irq.h"
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#include "exception/irq.h"
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#include <common/errno.h>
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#include <common/kprint.h>
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// 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
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void pci_irq_enable(ul irq_num)
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{
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}
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void pci_irq_disable(ul irq_num)
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{
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}
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void pci_irq_install(ul irq_num)
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{
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}
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void pci_irq_uninstall(ul irq_num)
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{
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}
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/// @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）
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/// @param irq_num 要进行注册的中断号
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/// @param pci_irq_handler 对应的中断处理函数
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/// @param parameter 中断处理函数传入参数
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/// @param irq_name 中断名字
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/// @param pci_irq_ack 对于中断的回复，为NULL时会使用默认回应
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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))
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{
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// 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
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irq_desc_t *p = NULL;
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if (irq_num >= 32 && irq_num < 0x80)
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p = &interrupt_desc[irq_num - 32];
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else if (irq_num >= 150 && irq_num < 200)
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p = &local_apic_interrupt_desc[irq_num - 150];
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else
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{
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//kerror("irq install for pci irq: invalid irq num: %ld.", irq_num);
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return EINVAL;
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}
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if(p->irq_name!=NULL)
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{
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return EAGAIN;
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}
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hardware_intr_controller* pci_interrupt_controller = kmalloc(sizeof(hardware_intr_controller),0);
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pci_interrupt_controller->enable = pci_irq_enable;
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pci_interrupt_controller->disable = pci_irq_disable;
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pci_interrupt_controller->install= pci_irq_install;
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pci_interrupt_controller->uninstall= pci_irq_uninstall;
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if(pci_irq_ack)
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pci_interrupt_controller->ack = pci_irq_ack;
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int namelen = sizeof(strlen(irq_name) + 1);
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p->irq_name = (char *)kmalloc(namelen, 0);
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memset(p->irq_name, 0, namelen);
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strncpy(p->irq_name, irq_name, namelen);
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p->parameter = parameter;
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p->flags = 0;
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p->handler = pci_irq_handler;
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return 0;
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};
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/// @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
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/// @param irq_num 要进行注销的中断号
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void c_irq_uninstall(ul irq_num)
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{
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// 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
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irq_desc_t *p = NULL;
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if (irq_num >= 32 && irq_num < 0x80)
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p = &interrupt_desc[irq_num - 32];
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else if (irq_num >= 150 && irq_num < 200)
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p = &local_apic_interrupt_desc[irq_num - 150];
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else
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{
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kerror("irq install for pci irq: invalid irq num: %ld.", irq_num);
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}
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if(p->irq_name!=NULL)
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{
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kfree(p->irq_name);
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p->irq_name = NULL;
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}
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if(p->controller!=NULL)
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{
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kfree(p->controller);
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p->controller = NULL;
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}
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p->parameter = 0;
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p->handler = NULL;
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} |