diff options
Diffstat (limited to 'include/asm-i386/desc.h')
| -rw-r--r-- | include/asm-i386/desc.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h deleted file mode 100644 index 494e73bca09..00000000000 --- a/include/asm-i386/desc.h +++ /dev/null @@ -1,165 +0,0 @@ -#ifndef __ARCH_DESC_H -#define __ARCH_DESC_H - -#include <asm/ldt.h> -#include <asm/segment.h> - -#define CPU_16BIT_STACK_SIZE 1024 - -#ifndef __ASSEMBLY__ - -#include <linux/preempt.h> -#include <linux/smp.h> -#include <linux/percpu.h> - -#include <asm/mmu.h> - -extern struct desc_struct cpu_gdt_table[GDT_ENTRIES]; - -DECLARE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]); - -struct Xgt_desc_struct { - unsigned short size; - unsigned long address __attribute__((packed)); - unsigned short pad; -} __attribute__ ((packed)); - -extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS]; - -static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) -{ - return ((struct desc_struct *)cpu_gdt_descr[cpu].address); -} - -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) - -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr)) -#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr)) -#define load_tr(tr) __asm__ __volatile("ltr %0"::"mr" (tr)) -#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"mr" (ldt)) - -#define store_gdt(dtr) __asm__ ("sgdt %0":"=m" (*dtr)) -#define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr)) -#define store_tr(tr) __asm__ ("str %0":"=mr" (tr)) -#define store_ldt(ldt) __asm__ ("sldt %0":"=mr" (ldt)) - -/* - * This is the ldt that every process will get unless we need - * something other than this. - */ -extern struct desc_struct default_ldt[]; -extern void set_intr_gate(unsigned int irq, void * addr); - -#define _set_tssldt_desc(n,addr,limit,type) \ -__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \ - "movw %w1,2(%2)\n\t" \ - "rorl $16,%1\n\t" \ - "movb %b1,4(%2)\n\t" \ - "movb %4,5(%2)\n\t" \ - "movb $0,6(%2)\n\t" \ - "movb %h1,7(%2)\n\t" \ - "rorl $16,%1" \ - : "=m"(*(n)) : "q" (addr), "r"(n), "ir"(limit), "i"(type)) - -static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, void *addr) -{ - _set_tssldt_desc(&get_cpu_gdt_table(cpu)[entry], (int)addr, - offsetof(struct tss_struct, __cacheline_filler) - 1, 0x89); -} - -#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr) - -static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int size) -{ - _set_tssldt_desc(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT], (int)addr, ((size << 3)-1), 0x82); -} - -#define LDT_entry_a(info) \ - ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) - -#define LDT_entry_b(info) \ - (((info)->base_addr & 0xff000000) | \ - (((info)->base_addr & 0x00ff0000) >> 16) | \ - ((info)->limit & 0xf0000) | \ - (((info)->read_exec_only ^ 1) << 9) | \ - ((info)->contents << 10) | \ - (((info)->seg_not_present ^ 1) << 15) | \ - ((info)->seg_32bit << 22) | \ - ((info)->limit_in_pages << 23) | \ - ((info)->useable << 20) | \ - 0x7000) - -#define LDT_empty(info) (\ - (info)->base_addr == 0 && \ - (info)->limit == 0 && \ - (info)->contents == 0 && \ - (info)->read_exec_only == 1 && \ - (info)->seg_32bit == 0 && \ - (info)->limit_in_pages == 0 && \ - (info)->seg_not_present == 1 && \ - (info)->useable == 0 ) - -static inline void write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b) -{ - __u32 *lp = (__u32 *)((char *)ldt + entry*8); - *lp = entry_a; - *(lp+1) = entry_b; -} - -#if TLS_SIZE != 24 -# error update this code. -#endif - -static inline void load_TLS(struct thread_struct *t, unsigned int cpu) -{ -#define C(i) get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i] - C(0); C(1); C(2); -#undef C -} - -static inline void clear_LDT(void) -{ - int cpu = get_cpu(); - - set_ldt_desc(cpu, &default_ldt[0], 5); - load_LDT_desc(); - put_cpu(); -} - -/* - * load one particular LDT into the current CPU - */ -static inline void load_LDT_nolock(mm_context_t *pc, int cpu) -{ - void *segments = pc->ldt; - int count = pc->size; - - if (likely(!count)) { - segments = &default_ldt[0]; - count = 5; - } - - set_ldt_desc(cpu, segments, count); - load_LDT_desc(); -} - -static inline void load_LDT(mm_context_t *pc) -{ - int cpu = get_cpu(); - load_LDT_nolock(pc, cpu); - put_cpu(); -} - -static inline unsigned long get_desc_base(unsigned long *desc) -{ - unsigned long base; - base = ((desc[0] >> 16) & 0x0000ffff) | - ((desc[1] << 16) & 0x00ff0000) | - (desc[1] & 0xff000000); - return base; -} - -#endif /* !__ASSEMBLY__ */ - -#endif |