More work

cpu/i386/gdt.c

@@ -105,6 +105,20 @@ static void write_tss(int32_t num, uint16_t ss0, uint32_t esp0) {
   tss.ss = tss.ds = tss.es = tss.fs = tss.gs = 0x13;
 }
 
+void allow_all_ports() {
+  for (int i=0;i<8192;i++) {
+    tss.iopb[i]=0;
+  }
+}
+
+
+void block_all_ports() {
+  for (int i=0;i<8192;i++) {
+    tss.iopb[i]=0xFF;
+  }
+}
+
+
 void gdt_init() {
   set_entry(0,0,0,0);
   set_entry(1,0,0xFFFFF,0x9A);

cpu/i386/gdt.h

@@ -3,5 +3,6 @@
 
 void gdt_init();
 void tss_stack_reset();
-
+void allow_all_ports();
+void block_all_ports();
 #endif

cpu/i386/paging.c

@@ -80,11 +80,8 @@ void* alloc_pages(int num_pages) {
     }
   }
   if (remaining_blks!=0) {
-    return NULL;
+    klog("PANIC","Out of memory");
   }
-  // for (int i=0;i<num_pages;i++) {
-  //   vmem_set_bmap_bit(bmap_index+i);
-  // }
   void* addr=(void*)(bmap_index<<12);
   map_pages(addr,phys_addr,num_pages,1,1);
   return addr;

cpu/i386/tasking.c

@@ -138,5 +138,10 @@ void tasking_yield() {
       1: \
         ");
     }
+    if (task->priv) {
+      allow_all_ports();
+    } else {
+      block_all_ports();
+    }
     switchTask(&oldCurr->regs, &currentTask->regs);
 }

drivers/i386/pci.c

@@ -31,50 +31,56 @@ static void write_config(uint8_t bus,uint8_t device,uint8_t func,uint8_t offset,
 }
 
 pci_dev_common_info* pci_get_dev_info(uint8_t bus,uint8_t device,uint8_t func) {
-  uint32_t* info=malloc(sizeof(uint32_t)*4);
+  uint32_t* info=malloc(sizeof(uint32_t)*5);
   info[0]=read_config(bus,device,func,0);
   info[1]=read_config(bus,device,func,4);
   info[2]=read_config(bus,device,func,8);
   info[3]=read_config(bus,device,func,0xC);
-  return (pci_dev_common_info*)info;
+  pci_dev_common_info* pci_info=(pci_dev_common_info*)info;
+  pci_info->bus=bus;
+  pci_info->device=device;
+  pci_info->func=func;
+  return pci_info;
 }
 
-void pci_set_dev_info(uint8_t bus,uint8_t device,uint8_t func,pci_dev_common_info* inf) {
+void pci_set_dev_info(pci_dev_common_info* inf) {
   uint32_t* info=(uint32_t*)inf;
-  write_config(bus,device,func,0,info[0]);
-  write_config(bus,device,func,4,info[1]);
-  write_config(bus,device,func,8,info[2]);
-  write_config(bus,device,func,0xC,info[3]);
+  write_config(inf->bus,inf->device,inf->func,0,info[0]);
+  write_config(inf->bus,inf->device,inf->func,4,info[1]);
+  write_config(inf->bus,inf->device,inf->func,8,info[2]);
+  write_config(inf->bus,inf->device,inf->func,0xC,info[3]);
 }
 
-static void checkFunction(uint8_t bus,uint8_t device,uint8_t func,pci_dev_common_info* info);
+static void checkFunction(pci_dev_common_info* info);
 
 static void checkDevice(uint8_t bus, uint8_t device) {
   pci_dev_common_info* info=pci_get_dev_info(bus,device,0);
   if(info->vend_id==0xFFFF||info->class_code==0xFF) {
     return;
   }
-  checkFunction(bus,device,0,info);
+  checkFunction(info);
   if((info->header_type&0x80)!=0) {
     for(uint8_t function=1;function<8;function++) {
       pci_dev_common_info* info=pci_get_dev_info(bus,device,function);
       if(info->vend_id!=0xFFFF&&info->class_code!=0xFF) {
-        checkFunction(bus,device,function,info);
+        checkFunction(info);
       }
     }
   }
 }
 
-static void checkFunction(uint8_t bus,uint8_t device,uint8_t func,pci_dev_common_info* info) {
+static void checkFunction(pci_dev_common_info* info) {
   if (pci_num_devs==max_devs) {
     max_devs+=32;
     pci_devs=malloc(sizeof(pci_dev_common_info)*max_devs);
   }
+  // pci_devs[pci_num_devs]=info;
+  // pci_num_devs++;
   klog("INFO","Found PCI device. Class code:%x, Subclass:%x Prog IF:%x",info->class_code,info->subclass,info->prog_if);
   klog("INFO","Vendor ID:%x, Device ID:%x",info->vend_id,info->dev_id);
   if ((info->header_type&0x7f)==0) {
     for (uint8_t offset=0x10;offset<0x10+4*6;offset+=4) {
-      uint32_t bar=read_config(bus,device,func,offset);
+      uint32_t bar=read_config(info->bus,info->device,info->func,offset);
       if (bar!=0) {
         if (bar&0x1) {
           klog("INFO","IO BAR%d:%x",(offset-0x10)/4,bar&0xFFFFFFFC);

drivers/i386/pci.h

@@ -8,6 +8,6 @@
 #define PCI_CONFIG_DATA 0xCFC
 
 pci_dev_common_info* pci_get_dev_info(uint8_t bus,uint8_t device,uint8_t func);
-void pci_set_dev_info(uint8_t bus,uint8_t device,uint8_t func,pci_dev_common_info* inf);
+void pci_set_dev_info(pci_dev_common_info* inf);
 
 #endif

drivers/pci.h

@@ -16,6 +16,9 @@ typedef struct {
   uint8_t lat_timer;
   uint8_t header_type;
   uint8_t bist;
+  uint16_t bus;
+  uint8_t device;
+  uint8_t func;
 } __attribute__((packed)) pci_dev_common_info;
 
 typedef enum {