fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-x86_64 / desc.h

diff --git a/include/asm-x86_64/desc.h b/include/asm-x86_64/desc.h
index 6aefb9c..913d6ac 100644 (file)
--- a/include/asm-x86_64/desc.h
+++ b/include/asm-x86_64/desc.h
@@ -8,62 +8,13 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
+#include <linux/smp.h>
+#include <asm/desc_defs.h>
+
 #include <asm/segment.h>
 #include <asm/mmu.h>
 
-// 8 byte segment descriptor
-struct desc_struct { 
-       u16 limit0;
-       u16 base0;
-       unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-       unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed)); 
-
-struct n_desc_struct { 
-       unsigned int a,b;
-};     
-
-extern struct desc_struct cpu_gdt_table[NR_CPUS][GDT_ENTRIES];
-
-enum { 
-       GATE_INTERRUPT = 0xE, 
-       GATE_TRAP = 0xF,        
-       GATE_CALL = 0xC,
-};     
-
-// 16byte gate
-struct gate_struct {          
-       u16 offset_low;
-       u16 segment; 
-       unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
-       u16 offset_middle;
-       u32 offset_high;
-       u32 zero1; 
-} __attribute__((packed));
-
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF) 
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
-
-enum { 
-       DESC_TSS = 0x9,
-       DESC_LDT = 0x2,
-}; 
-
-// LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc { 
-       u16 limit0;
-       u16 base0;
-       unsigned base1 : 8, type : 5, dpl : 2, p : 1;
-       unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
-       u32 base3;
-       u32 zero1; 
-} __attribute__((packed)); 
-
-struct desc_ptr {
-       unsigned short size;
-       unsigned long address;
-} __attribute__((packed)) ;
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
@@ -75,6 +26,10 @@ struct desc_ptr {
  */
 extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[]; 
+extern struct desc_ptr cpu_gdt_descr[];
+
+/* the cpu gdt accessor */
+#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
 
 static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist)  
 {
@@ -95,19 +50,27 @@ static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsig
 
 static inline void set_intr_gate(int nr, void *func) 
 { 
+       BUG_ON((unsigned)nr > 0xFF);
        _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0); 
 } 
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist) 
 { 
+       BUG_ON((unsigned)nr > 0xFF);
        _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist); 
 } 
 
 static inline void set_system_gate(int nr, void *func) 
 { 
+       BUG_ON((unsigned)nr > 0xFF);
        _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0); 
 } 
 
+static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
+{
+       _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
+}
+
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, unsigned type, 
                                         unsigned size) 
 { 
@@ -126,20 +89,27 @@ static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, unsigned
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 { 
-       set_tssldt_descriptor(&cpu_gdt_table[cpu][GDT_ENTRY_TSS], (unsigned long)addr, 
-                             DESC_TSS,
-                             sizeof(struct tss_struct) - 1);
+       /*
+        * sizeof(unsigned long) coming from an extra "long" at the end
+        * of the iobitmap. See tss_struct definition in processor.h
+        *
+        * -1? seg base+limit should be pointing to the address of the
+        * last valid byte
+        */
+       set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+               (unsigned long)addr, DESC_TSS,
+               IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 } 
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 { 
-       set_tssldt_descriptor(&cpu_gdt_table[cpu][GDT_ENTRY_LDT], (unsigned long)addr, 
+       set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
                              DESC_LDT, size * 8 - 1);
 }
 
 static inline void set_seg_base(unsigned cpu, int entry, void *base)
 { 
-       struct desc_struct *d = &cpu_gdt_table[cpu][entry];
+       struct desc_struct *d = &cpu_gdt(cpu)[entry];
        u32 addr = (u32)(u64)base;
        BUG_ON((u64)base >> 32); 
        d->base0 = addr & 0xffff;
@@ -181,7 +151,7 @@ static inline void set_seg_base(unsigned cpu, int entry, void *base)
 
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
-       u64 *gdt = (u64 *)(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN);
+       u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
        gdt[0] = t->tls_array[0];
        gdt[1] = t->tls_array[1];
        gdt[2] = t->tls_array[2];
@@ -190,7 +160,7 @@ static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 /*
  * load one particular LDT into the current CPU
  */
-extern inline void load_LDT_nolock (mm_context_t *pc, int cpu)
+static inline void load_LDT_nolock (mm_context_t *pc, int cpu)
 {
        int count = pc->size;