41 lines
949 B
C
41 lines
949 B
C
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/*
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* Copyright (C) 2008 Imagination Technologies
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*/
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#ifndef __METAG_HWTHREAD_H
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#define __METAG_HWTHREAD_H
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#include <linux/bug.h>
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#include <linux/io.h>
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#include <asm/metag_mem.h>
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#define BAD_HWTHREAD_ID (0xFFU)
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#define BAD_CPU_ID (0xFFU)
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extern u8 cpu_2_hwthread_id[];
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extern u8 hwthread_id_2_cpu[];
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/*
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* Each hardware thread's Control Unit registers are memory-mapped
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* and can therefore be accessed by any other hardware thread.
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*
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* This helper function returns the memory address where "thread"'s
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* register "regnum" is mapped.
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*/
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static inline
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void __iomem *__CU_addr(unsigned int thread, unsigned int regnum)
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{
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unsigned int base, thread_offset, thread_regnum;
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WARN_ON(thread == BAD_HWTHREAD_ID);
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base = T0UCTREG0; /* Control unit base */
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thread_offset = TnUCTRX_STRIDE * thread;
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thread_regnum = TXUCTREGn_STRIDE * regnum;
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return (void __iomem *)(base + thread_offset + thread_regnum);
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}
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#endif /* __METAG_HWTHREAD_H */
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