refactor: Optimize the context switch overhead

[lunaix-os.git] / lunaix-os / includes / hal / cpu.h

diff --git a/lunaix-os/includes/hal/cpu.h b/lunaix-os/includes/hal/cpu.h
index 1a3173bb2771079c9c564aa9392b1aa75eb3d6aa..3b77c7eb12aeca27205d8406f738ae5c8a17f0c2 100644 (file)
--- a/lunaix-os/includes/hal/cpu.h
+++ b/lunaix-os/includes/hal/cpu.h
@@ -1,7 +1,9 @@
 #ifndef __LUNAIX_CPU_H
 #define __LUNAIX_CPU_H
 
 #ifndef __LUNAIX_CPU_H
 #define __LUNAIX_CPU_H
 

-#include <stdint.h>
+#include <lunaix/types.h>
+
+#define SEL_RPL(selector) ((selector)&0x3)

 
 typedef unsigned int reg32;
 typedef unsigned short reg16;
 
 typedef unsigned int reg32;
 typedef unsigned short reg16;


@@ -20,35 +22,60 @@ typedef struct
 
 typedef struct
 {
 
 typedef struct
 {

-    reg16 ss;
-    reg16 es;

     reg16 ds;
     reg16 ds;

+    reg16 es;

     reg16 fs;
     reg16 gs;
     reg16 fs;
     reg16 gs;

-    reg16 cs;

 } __attribute__((packed)) sg_reg;
 
 void
 cpu_get_brand(char* brand_out);
 
 } __attribute__((packed)) sg_reg;
 
 void
 cpu_get_brand(char* brand_out);
 

+int
+cpu_has_apic();
+

 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wreturn-type"
 static inline reg32
 cpu_rcr0()
 {
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wreturn-type"
 static inline reg32
 cpu_rcr0()
 {

-    asm("mov %cr0, %eax");
+    ptr_t val;
+    asm volatile("movl %%cr0,%0" : "=r"(val));
+    return val;

 }
 
 static inline reg32
 cpu_rcr2()
 {
 }
 
 static inline reg32
 cpu_rcr2()
 {

-    asm("mov %cr2, %eax");
+    ptr_t val;
+    asm volatile("movl %%cr2,%0" : "=r"(val));
+    return val;

 }
 
 static inline reg32
 cpu_rcr3()
 {
 }
 
 static inline reg32
 cpu_rcr3()
 {

-    asm("mov %cr3, %eax");
+    ptr_t val;
+    asm volatile("movl %%cr3,%0" : "=r"(val));
+    return val;
+}
+
+static inline reg32
+cpu_rcr4()
+{
+    ptr_t val;
+    asm volatile("movl %%cr4,%0" : "=r"(val));
+    return val;
+}
+
+static inline reg32
+cpu_reflags()
+{
+    ptr_t val;
+    asm volatile("pushf\n"
+                 "popl %0\n"
+                 : "=r"(val)::);
+    return val;

 }
 #pragma GCC diagnostic pop
 
 }
 #pragma GCC diagnostic pop
 


@@ -71,21 +98,21 @@ cpu_lcr3(reg32 v)
 }
 
 static inline void
 }
 
 static inline void

-cpu_invplg(void* va)
+cpu_invplg(ptr_t va)

 {
 {

-    asm("invlpg (%0)" ::"r"((uintptr_t)va) : "memory");
+    asm volatile("invlpg (%0)" ::"r"(va) : "memory");

 }
 
 static inline void
 cpu_enable_interrupt()
 {
 }
 
 static inline void
 cpu_enable_interrupt()
 {

-    asm("sti");
+    asm volatile("sti");

 }
 
 static inline void
 cpu_disable_interrupt()
 {
 }
 
 static inline void
 cpu_disable_interrupt()
 {

-    asm("cli");
+    asm volatile("cli");

 }
 
 static inline void
 }
 
 static inline void


@@ -98,4 +125,22 @@ cpu_invtlb()
         : "r"(interm));
 }
 
         : "r"(interm));
 }
 

+static inline void
+cpu_int(int vect)
+{
+    asm("int %0" ::"i"(vect));
+}
+
+void
+cpu_rdmsr(u32_t msr_idx, u32_t* reg_high, u32_t* reg_low);
+
+void
+cpu_wrmsr(u32_t msr_idx, u32_t reg_high, u32_t reg_low);
+
+static inline void
+cpu_ldvmspace(ptr_t vms)
+{
+    cpu_lcr3(vms);
+}
+

 #endif
\ No newline at end of file
 #endif
\ No newline at end of file