-
-/* The inverse of do_copy_regs(). No error or sanity checking. */
-
-void do_restore_regs (xtensa_gregset_t *elfregs, struct pt_regs *regs,
- struct task_struct *tsk)
-{
- int i, n, wb_offset;
-
- /* Note: PS.EXCM is not set while user task is running; it
- * needs to be set in regs->ps is for exception handling convenience.
- */
-
- regs->pc = elfregs->pc;
- regs->ps = (elfregs->ps | (1 << PS_EXCM_BIT));
- regs->exccause = elfregs->exccause;
- regs->excvaddr = elfregs->excvaddr;
- regs->windowbase = elfregs->windowbase;
- regs->windowstart = elfregs->windowstart;
- regs->lbeg = elfregs->lbeg;
- regs->lend = elfregs->lend;
- regs->lcount = elfregs->lcount;
- regs->sar = elfregs->sar;
- regs->syscall = elfregs->syscall;
-
- /* Clear everything. */
-
- memset (regs->areg, 0, sizeof(regs->areg));
-
- /* Copy regs from live window frame. */
-
- wb_offset = regs->windowbase * 4;
- n = (regs->wmask&1)? 4 : (regs->wmask&2)? 8 : (regs->wmask&4)? 12 : 16;
-
- for (i = 0; i < n; i++)
- regs->areg[(wb_offset+i) % XCHAL_NUM_AREGS] = elfregs->ar[i];
-
- n = (regs->wmask >> 4) * 4;
-
- for (i = XCHAL_NUM_AREGS - n; n > 0; i++, n--)
- regs->areg[(wb_offset+i) % XCHAL_NUM_AREGS] = elfregs->ar[i];
-}
-
-/*
- * do_save_fpregs() gathers information from 'struct pt_regs' and
- * 'current->thread' to fill in the elf_fpregset_t structure.
- *
- * Core files and ptrace use elf_fpregset_t.
- */
-
-void do_save_fpregs (elf_fpregset_t *fpregs, struct pt_regs *regs,
- struct task_struct *tsk)
-{
-#if XCHAL_HAVE_CP
-
- extern unsigned char _xtensa_reginfo_tables[];
- extern unsigned _xtensa_reginfo_table_size;
- int i;
- unsigned long flags;
-
- /* Before dumping coprocessor state from memory,
- * ensure any live coprocessor contents for this
- * task are first saved to memory:
- */
- local_irq_save(flags);
-
- for (i = 0; i < XCHAL_CP_MAX; i++) {
- if (tsk == coprocessor_info[i].owner) {
- enable_coprocessor(i);
- save_coprocessor_registers(
- tsk->thread.cp_save+coprocessor_info[i].offset,i);
- disable_coprocessor(i);
- }
- }
-
- local_irq_restore(flags);
-
- /* Now dump coprocessor & extra state: */
- memcpy((unsigned char*)fpregs,
- _xtensa_reginfo_tables, _xtensa_reginfo_table_size);
- memcpy((unsigned char*)fpregs + _xtensa_reginfo_table_size,
- tsk->thread.cp_save, XTENSA_CP_EXTRA_SIZE);
-#endif