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- /*
- * include/asm-alpha/processor.h
- *
- * Copyright (C) 1994 Linus Torvalds
- */
-
- #ifndef __ASM_ALPHA_PROCESSOR_H
- #define __ASM_ALPHA_PROCESSOR_H
-
- /*
- * We have a 41-bit user address space: 2TB user VM...
- */
- #define TASK_SIZE (0x20000000000UL)
-
- /*
- * Bus types
- */
- #define EISA_bus 1
- #define EISA_bus__is_a_macro /* for versions in ksyms.c */
- #define MCA_bus 0
- #define MCA_bus__is_a_macro /* for versions in ksyms.c */
-
- /*
- * The alpha has no problems with write protection
- */
- #define wp_works_ok 1
- #define wp_works_ok__is_a_macro /* for versions in ksyms.c */
-
- struct thread_struct {
- unsigned long ksp;
- unsigned long usp;
- unsigned long ptbr;
- unsigned int pcc;
- unsigned int asn;
- unsigned long unique;
- unsigned long flags;
- unsigned long res1, res2;
- };
-
- #define INIT_MMAP { &init_task, 0xfffffc0000300000, 0xfffffc0010000000, \
- PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC }
-
- #define INIT_TSS { \
- 0, 0, 0, \
- 0, 0, 0, \
- 0, 0, 0, \
- }
-
- /*
- * These are the "cli()" and "sti()" for software interrupts
- * They work by increasing/decreasing the "intr_count" value,
- * and as such can be nested arbitrarily.
- */
- extern inline void start_bh_atomic(void)
- {
- unsigned long dummy;
- __asm__ __volatile__(
- "\n1:\t"
- "ldq_l %0,%1\n\t"
- "addq %0,1,%0\n\t"
- "stq_c %0,%1\n\t"
- "beq %0,1b\n"
- : "=r" (dummy), "=m" (intr_count)
- : "0" (0));
- }
-
- extern inline void end_bh_atomic(void)
- {
- unsigned long dummy;
- __asm__ __volatile__(
- "\n1:\t"
- "ldq_l %0,%1\n\t"
- "subq %0,1,%0\n\t"
- "stq_c %0,%1\n\t"
- "beq %0,1b\n"
- : "=r" (dummy), "=m" (intr_count)
- : "0" (0));
- }
-
- /*
- * Do necessary setup to start up a newly executed thread.
- */
- static inline void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
- {
- regs->pc = pc;
- wrusp(sp);
- }
-
- #endif /* __ASM_ALPHA_PROCESSOR_H */
-