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/* TLS for MIPS is described in http://www.linux-mips.org/wiki/NPTL */
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/* TLS for MIPS is described in http://www.linux-mips.org/wiki/NPTL */
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#ifndef __LIBC__mips32THREAD_H__
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#ifndef __LIBC__mips32THREAD_H__
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#define __LIBC__mips32THREAD_H__
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#define __LIBC__mips32THREAD_H__
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/* I did not find any specification (neither MIPS nor PowerPC), but
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 * as I found it
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 * - it uses Variant II
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 * - TCB is at Address(First TLS Block)+0x7000.
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 * - DTV is at Address(First TLS Block)+0x8000
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 * - What would happen if the TLS data was larger then 0x7000?
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 * - The linker never accesses DTV directly, has the second definition any
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 *   sense?
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 * We will make it this way:
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 * - TCB is at TP-0x7000-sizeof(tcb)
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 * - No assumption about DTV etc., but it will not have a fixed address
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 */
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#define MIPS_TP_OFFSET 0x7000
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typedef struct {
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    void *pst_data;
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} tcb_t;
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static inline void __tls_set(void *tls)
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static inline void __tcb_set(tcb_t *tcb)
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{
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{
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    void *tp = tcb;
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    tp += MIPS_TP_OFFSET + sizeof(tcb_t);
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    __asm__ volatile ("add $27, %0, $0" : : "r"(tls)); /* Move tls to K1 */
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    __asm__ volatile ("add $27, %0, $0" : : "r"(tp)); /* Move tls to K1 */
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}
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}
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static inline void * __tls_get(void)
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static inline tcb_t * __tcb_get(void)
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{
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{
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    void * retval;
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    void * retval;
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    __asm__ volatile("add %0, $27, $0" : "=r"(retval));
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    __asm__ volatile("add %0, $27, $0" : "=r"(retval));
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    return retval;
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    return (tcb_t *)(retval - MIPS_TP_OFFSET - sizeof(tcb_t));
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}
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}
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#endif
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#endif