diff options
Diffstat (limited to 'linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pda.h')
-rw-r--r-- | linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pda.h | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pda.h b/linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pda.h deleted file mode 100644 index 76dac1c98b..0000000000 --- a/linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pda.h +++ /dev/null @@ -1,85 +0,0 @@ -#ifndef X86_64_PDA_H -#define X86_64_PDA_H - -#ifndef __ASSEMBLY__ -#include <linux/stddef.h> -#include <linux/types.h> -#include <linux/cache.h> - -/* Per processor datastructure. %gs points to it while the kernel runs */ -struct x8664_pda { - struct task_struct *pcurrent; /* Current process */ - unsigned long data_offset; /* Per cpu data offset from linker address */ - struct x8664_pda *me; /* Pointer to itself */ - unsigned long kernelstack; /* top of kernel stack for current */ - unsigned long oldrsp; /* user rsp for system call */ - unsigned long irqrsp; /* Old rsp for interrupts. */ - int irqcount; /* Irq nesting counter. Starts with -1 */ - int cpunumber; /* Logical CPU number */ - char *irqstackptr; /* top of irqstack */ - unsigned int __softirq_pending; - unsigned int __nmi_count; /* number of NMI on this CPUs */ - unsigned long idle_timestamp; - struct mm_struct *active_mm; - int mmu_state; - unsigned apic_timer_irqs; - int kernel_mode; /* kernel or user mode */ -} ____cacheline_aligned; - - -#define IRQSTACK_ORDER 2 -#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER) - -extern struct x8664_pda cpu_pda[]; - -/* - * There is no fast way to get the base address of the PDA, all the accesses - * have to mention %fs/%gs. So it needs to be done this Torvaldian way. - */ -#define sizeof_field(type,field) (sizeof(((type *)0)->field)) -#define typeof_field(type,field) typeof(((type *)0)->field) - -extern void __bad_pda_field(void); - -#define pda_offset(field) offsetof(struct x8664_pda, field) - -#define pda_to_op(op,field,val) do { \ - switch (sizeof_field(struct x8664_pda, field)) { \ -case 2: \ -asm volatile(op "w %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); break; \ -case 4: \ -asm volatile(op "l %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); break; \ -case 8: \ -asm volatile(op "q %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); break; \ - default: __bad_pda_field(); \ - } \ - } while (0) - -/* - * AK: PDA read accesses should be neither volatile nor have an memory clobber. - * Unfortunately removing them causes all hell to break lose currently. - */ -#define pda_from_op(op,field) ({ \ - typedef typeof_field(struct x8664_pda, field) T__; T__ ret__; \ - switch (sizeof_field(struct x8664_pda, field)) { \ -case 2: \ -asm volatile(op "w %%gs:%P1,%0":"=r" (ret__):"i"(pda_offset(field)):"memory"); break;\ -case 4: \ -asm volatile(op "l %%gs:%P1,%0":"=r" (ret__):"i"(pda_offset(field)):"memory"); break;\ -case 8: \ -asm volatile(op "q %%gs:%P1,%0":"=r" (ret__):"i"(pda_offset(field)):"memory"); break;\ - default: __bad_pda_field(); \ - } \ - ret__; }) - - -#define read_pda(field) pda_from_op("mov",field) -#define write_pda(field,val) pda_to_op("mov",field,val) -#define add_pda(field,val) pda_to_op("add",field,val) -#define sub_pda(field,val) pda_to_op("sub",field,val) - -#endif - -#define PDA_STACKOFFSET (5*8) - -#endif |