#ifndef __ASM_SH_SYSTEM_32_H #define __ASM_SH_SYSTEM_32_H #include <linux/types.h> struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next); /* * switch_to() should switch tasks to task nr n, first */ #define switch_to(prev, next, last) \ do { \ register u32 *__ts1 __asm__ ("r1") = (u32 *)&prev->thread.sp; \ register u32 *__ts2 __asm__ ("r2") = (u32 *)&prev->thread.pc; \ register u32 *__ts4 __asm__ ("r4") = (u32 *)prev; \ register u32 *__ts5 __asm__ ("r5") = (u32 *)next; \ register u32 *__ts6 __asm__ ("r6") = (u32 *)&next->thread.sp; \ register u32 __ts7 __asm__ ("r7") = next->thread.pc; \ struct task_struct *__last; \ \ __asm__ __volatile__ ( \ ".balign 4\n\t" \ "stc.l gbr, @-r15\n\t" \ "sts.l pr, @-r15\n\t" \ "mov.l r8, @-r15\n\t" \ "mov.l r9, @-r15\n\t" \ "mov.l r10, @-r15\n\t" \ "mov.l r11, @-r15\n\t" \ "mov.l r12, @-r15\n\t" \ "mov.l r13, @-r15\n\t" \ "mov.l r14, @-r15\n\t" \ "mov.l r15, @r1\t! save SP\n\t" \ "mov.l @r6, r15\t! change to new stack\n\t" \ "mova 1f, %0\n\t" \ "mov.l %0, @r2\t! save PC\n\t" \ "mov.l 2f, %0\n\t" \ "jmp @%0\t! call __switch_to\n\t" \ " lds r7, pr\t! with return to new PC\n\t" \ ".balign 4\n" \ "2:\n\t" \ ".long __switch_to\n" \ "1:\n\t" \ "mov.l @r15+, r14\n\t" \ "mov.l @r15+, r13\n\t" \ "mov.l @r15+, r12\n\t" \ "mov.l @r15+, r11\n\t" \ "mov.l @r15+, r10\n\t" \ "mov.l @r15+, r9\n\t" \ "mov.l @r15+, r8\n\t" \ "lds.l @r15+, pr\n\t" \ "ldc.l @r15+, gbr\n\t" \ : "=z" (__last) \ : "r" (__ts1), "r" (__ts2), "r" (__ts4), \ "r" (__ts5), "r" (__ts6), "r" (__ts7) \ : "r3", "t"); \ \ last = __last; \ } while (0) #define __uses_jump_to_uncached __attribute__ ((__section__ (".uncached.text"))) /* * Jump to uncached area. * When handling TLB or caches, we need to do it from an uncached area. */ #define jump_to_uncached() \ do { \ unsigned long __dummy; \ \ __asm__ __volatile__( \ "mova 1f, %0\n\t" \ "add %1, %0\n\t" \ "jmp @%0\n\t" \ " nop\n\t" \ ".balign 4\n" \ "1:" \ : "=&z" (__dummy) \ : "r" (cached_to_uncached)); \ } while (0) /* * Back to cached area. */ #define back_to_cached() \ do { \ unsigned long __dummy; \ ctrl_barrier(); \ __asm__ __volatile__( \ "mov.l 1f, %0\n\t" \ "jmp @%0\n\t" \ " nop\n\t" \ ".balign 4\n" \ "1: .long 2f\n" \ "2:" \ : "=&r" (__dummy)); \ } while (0) #endif /* __ASM_SH_SYSTEM_32_H */