openwrt/upstream - upstream openwrt

	Commit message (Expand)	Author	Age	Files	Lines
*	generic-2.6/2.6.23: refresh patches	Gabor Juhos	2009-02-08	1	-2/+2
*	refresh generic 2.6.23 patches in upstream style	Imre Kaloz	2008-06-05	1	-6/+4
*	refresh generic 2.6.23 patches	Gabor Juhos	2008-05-18	1	-5/+5
*	add generic 2.6.23 patches and config	Eugene Konev	2007-10-04	1	-0/+39

#ifndef __ARCH_DESC_H #define __ARCH_DESC_H /* * Xen reserves a memory page of GDT entries. * No guest GDT entries exist beyond the Xen reserved area. */ #define NR_RESERVED_GDT_PAGES 1 #define NR_RESERVED_GDT_BYTES (NR_RESERVED_GDT_PAGES * PAGE_SIZE) #define NR_RESERVED_GDT_ENTRIES (NR_RESERVED_GDT_BYTES / 8) #define LAST_RESERVED_GDT_PAGE \ (FIRST_RESERVED_GDT_PAGE + NR_RESERVED_GDT_PAGES - 1) #define LAST_RESERVED_GDT_BYTE \ (FIRST_RESERVED_GDT_BYTE + NR_RESERVED_GDT_BYTES - 1) #define LAST_RESERVED_GDT_ENTRY \ (FIRST_RESERVED_GDT_ENTRY + NR_RESERVED_GDT_ENTRIES - 1) #define LDT_ENTRY_SIZE 8 #define load_TR(n) __asm__ __volatile__ ("ltr %%ax" : : "a" (__TSS(n)<<3) ) #if defined(__x86_64__) #define GUEST_KERNEL_RPL 3 #elif defined(__i386__) #define GUEST_KERNEL_RPL 1 #endif /* * Guest OS must provide its own code selectors, or use the one we provide. Any * LDT selector value is okay. Note that checking only the RPL is insufficient: * if the selector is poked into an interrupt, trap or call gate then the RPL * is ignored when the gate is accessed. */ #define VALID_SEL(_s) \ (((((_s)>>3) < FIRST_RESERVED_GDT_ENTRY) || ((_s)&4)) && \ (((_s)&3) == GUEST_KERNEL_RPL)) #define VALID_CODESEL(_s) ((_s) == FLAT_KERNEL_CS || VALID_SEL(_s)) /* These are bitmasks for the high 32 bits of a descriptor table entry. */ #define _SEGMENT_TYPE (15<< 8) #define _SEGMENT_EC ( 1<<10) /* Expand-down or Conforming segment */ #define _SEGMENT_CODE ( 1<<11) /* Code (vs data) segment for non-system segments */ #define _SEGMENT_S ( 1<<12) /* System descriptor (yes iff S==0) */ #define _SEGMENT_DPL ( 3<<13) /* Descriptor Privilege Level */ #define _SEGMENT_P ( 1<<15) /* Segment Present */ #define _SEGMENT_DB ( 1<<22) /* 16- or 32-bit segment */ #define _SEGMENT_G ( 1<<23) /* Granularity */ #ifndef __ASSEMBLY__ struct desc_struct { u32 a, b; }; #if defined(__x86_64__) #define __FIRST_TSS_ENTRY (FIRST_RESERVED_GDT_ENTRY + 8) #define __FIRST_LDT_ENTRY (__FIRST_TSS_ENTRY + 2) #define __TSS(n) (((n)<<2) + __FIRST_TSS_ENTRY) #define __LDT(n) (((n)<<2) + __FIRST_LDT_ENTRY) typedef struct { u64 a, b; } idt_entry_t; #define _set_gate(gate_addr,type,dpl,addr) \ do { \ (gate_addr)->a = \ (((unsigned long)(addr) & 0xFFFF0000UL) << 32) | \ ((unsigned long)(dpl) << 45) | \ ((unsigned long)(type) << 40) | \ ((unsigned long)(addr) & 0xFFFFUL) | \ ((unsigned long)__HYPERVISOR_CS64 << 16) | \ (1UL << 47); \ (gate_addr)->b = \ ((unsigned long)(addr) >> 32); \ } while (0) #define _set_tssldt_desc(desc,addr,limit,type) \ do { \ (desc)[0].a = \ ((u32)(addr) << 16) | ((u32)(limit) & 0xFFFF); \ (desc)[0].b = \ ((u32)(addr) & 0xFF000000U) | \ ((u32)(type) << 8) | 0x8000U | \ (((u32)(addr) & 0x00FF0000U) >> 16); \ (desc)[1].a = (u32)(((unsigned long)(addr)) >> 32); \ (desc)[1].b = 0; \ } while (0) #elif defined(__i386__) #define __DOUBLEFAULT_TSS_ENTRY FIRST_RESERVED_GDT_ENTRY #define __FIRST_TSS_ENTRY (FIRST_RESERVED_GDT_ENTRY + 8) #define __FIRST_LDT_ENTRY (__FIRST_TSS_ENTRY + 1) #define __TSS(n) (((n)<<1) + __FIRST_TSS_ENTRY) #define __LDT(n) (((n)<<1) + __FIRST_LDT_ENTRY) typedef struct desc_struct idt_entry_t; #define _set_gate(gate_addr,type,dpl,addr) \ do { \ int __d0, __d1; \ __asm__ __volatile__ ("movw %%dx,%%ax\n\t" \ "movw %4,%%dx\n\t" \ "movl %%eax,%0\n\t" \ "movl %%edx,%1" \ :"=m" (*((long *) (gate_addr))), \ "=m" (*(1+(long *) (gate_addr))), "=&a" (__d0), "=&d" (__d1) \ :"i" ((short) (0x8000+(dpl<<13)+(type<<8))), \ "3" ((char *) (addr)),"2" (__HYPERVISOR_CS << 16)); \ } while (0) #define _set_tssldt_desc(n,addr,limit,type) \ __asm__ __volatile__ ("movw %w3,0(%2)\n\t" \ "movw %%ax,2(%2)\n\t" \ "rorl $16,%%eax\n\t" \ "movb %%al,4(%2)\n\t" \ "movb %4,5(%2)\n\t" \ "movb $0,6(%2)\n\t" \ "movb %%ah,7(%2)\n\t" \ "rorl $16,%%eax" \ : "=m"(*(n)) : "a" (addr), "r"(n), "ir"(limit), "i"(type|0x80)) #endif extern struct desc_struct gdt_table[]; extern struct desc_struct *gdt; extern idt_entry_t *idt; struct Xgt_desc_struct { unsigned short size; unsigned long address __attribute__((packed)); }; #define idt_descr (*(struct Xgt_desc_struct *)((char *)&idt - 2)) #define gdt_descr (*(struct Xgt_desc_struct *)((char *)&gdt - 2)) extern void set_intr_gate(unsigned int irq, void * addr); extern void set_system_gate(unsigned int n, void *addr); extern void set_task_gate(unsigned int n, unsigned int sel); extern void set_tss_desc(unsigned int n, void *addr); #endif /* !__ASSEMBLY__ */ #endif /* __ARCH_DESC_H */