1/* 2 * linux/arch/m68k/lib/semaphore.S 3 * 4 * Copyright (C) 1996 Linus Torvalds 5 * 6 * m68k version by Andreas Schwab 7 * 8 * MAR/1999 -- modified to support ColdFire (gerg@snapgear.com) 9 */ 10 11#include <linux/linkage.h> 12#include <asm/semaphore.h> 13 14/* 15 * "down_failed" is called with the eventual return address 16 * in %a0, and the address of the semaphore in %a1. We need 17 * to increment the number of waiters on the semaphore, 18 * call "__down()", and then eventually return to try again. 19 */ 20ENTRY(__down_failed) 21#ifdef CONFIG_COLDFIRE 22 subl #12,%sp 23 moveml %a0/%d0/%d1,(%sp) 24#else 25 moveml %a0/%d0/%d1,-(%sp) 26#endif 27 movel %a1,-(%sp) 28 jbsr __down 29 movel (%sp)+,%a1 30 movel (%sp)+,%d0 31 movel (%sp)+,%d1 32 rts 33 34ENTRY(__down_failed_interruptible) 35 movel %a0,-(%sp) 36 movel %d1,-(%sp) 37 movel %a1,-(%sp) 38 jbsr __down_interruptible 39 movel (%sp)+,%a1 40 movel (%sp)+,%d1 41 rts 42 43ENTRY(__up_wakeup) 44#ifdef CONFIG_COLDFIRE 45 subl #12,%sp 46 moveml %a0/%d0/%d1,(%sp) 47#else 48 moveml %a0/%d0/%d1,-(%sp) 49#endif 50 movel %a1,-(%sp) 51 jbsr __up 52 movel (%sp)+,%a1 53 movel (%sp)+,%d0 54 movel (%sp)+,%d1 55 rts 56 57ENTRY(__down_failed_trylock) 58 movel %a0,-(%sp) 59 movel %d1,-(%sp) 60 movel %a1,-(%sp) 61 jbsr __down_trylock 62 movel (%sp)+,%a1 63 movel (%sp)+,%d1 64 movel (%sp)+,%a0 65 rts 66