diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/metag/include/asm/cmpxchg_lnkget.h |
Initial import
Diffstat (limited to 'arch/metag/include/asm/cmpxchg_lnkget.h')
-rw-r--r-- | arch/metag/include/asm/cmpxchg_lnkget.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/metag/include/asm/cmpxchg_lnkget.h b/arch/metag/include/asm/cmpxchg_lnkget.h new file mode 100644 index 000000000..0154e2807 --- /dev/null +++ b/arch/metag/include/asm/cmpxchg_lnkget.h @@ -0,0 +1,86 @@ +#ifndef __ASM_METAG_CMPXCHG_LNKGET_H +#define __ASM_METAG_CMPXCHG_LNKGET_H + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + int temp, old; + + smp_mb(); + + asm volatile ( + "1: LNKGETD %1, [%2]\n" + " LNKSETD [%2], %3\n" + " DEFR %0, TXSTAT\n" + " ANDT %0, %0, #HI(0x3f000000)\n" + " CMPT %0, #HI(0x02000000)\n" + " BNZ 1b\n" +#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE + " DCACHE [%2], %0\n" +#endif + : "=&d" (temp), "=&d" (old) + : "da" (m), "da" (val) + : "cc" + ); + + smp_mb(); + + return old; +} + +static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) +{ + int temp, old; + + smp_mb(); + + asm volatile ( + "1: LNKGETD %1, [%2]\n" + " LNKSETD [%2], %3\n" + " DEFR %0, TXSTAT\n" + " ANDT %0, %0, #HI(0x3f000000)\n" + " CMPT %0, #HI(0x02000000)\n" + " BNZ 1b\n" +#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE + " DCACHE [%2], %0\n" +#endif + : "=&d" (temp), "=&d" (old) + : "da" (m), "da" (val & 0xff) + : "cc" + ); + + smp_mb(); + + return old; +} + +static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, + unsigned long new) +{ + __u32 retval, temp; + + smp_mb(); + + asm volatile ( + "1: LNKGETD %1, [%2]\n" + " CMP %1, %3\n" + " LNKSETDEQ [%2], %4\n" + " BNE 2f\n" + " DEFR %0, TXSTAT\n" + " ANDT %0, %0, #HI(0x3f000000)\n" + " CMPT %0, #HI(0x02000000)\n" + " BNZ 1b\n" +#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE + " DCACHE [%2], %0\n" +#endif + "2:\n" + : "=&d" (temp), "=&da" (retval) + : "da" (m), "bd" (old), "da" (new) + : "cc" + ); + + smp_mb(); + + return retval; +} + +#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */ |