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