de6cc6515a
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 77 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.837555891@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
148 lines
3.0 KiB
C
148 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* utils.h: Utilities for SPU-side of the context switch operation.
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*
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* (C) Copyright IBM 2005
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*/
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#ifndef _SPU_CONTEXT_UTILS_H_
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#define _SPU_CONTEXT_UTILS_H_
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/*
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* 64-bit safe EA.
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*/
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typedef union {
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unsigned long long ull;
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unsigned int ui[2];
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} addr64;
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/*
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* 128-bit register template.
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*/
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typedef union {
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unsigned int slot[4];
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vector unsigned int v;
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} spu_reg128v;
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/*
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* DMA list structure.
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*/
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struct dma_list_elem {
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unsigned int size;
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unsigned int ea_low;
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};
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/*
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* Declare storage for 8-byte aligned DMA list.
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*/
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struct dma_list_elem dma_list[15] __attribute__ ((aligned(8)));
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/*
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* External definition for storage
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* declared in crt0.
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*/
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extern spu_reg128v regs_spill[NR_SPU_SPILL_REGS];
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/*
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* Compute LSCSA byte offset for a given field.
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*/
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static struct spu_lscsa *dummy = (struct spu_lscsa *)0;
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#define LSCSA_BYTE_OFFSET(_field) \
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((char *)(&(dummy->_field)) - (char *)(&(dummy->gprs[0].slot[0])))
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#define LSCSA_QW_OFFSET(_field) (LSCSA_BYTE_OFFSET(_field) >> 4)
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static inline void set_event_mask(void)
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{
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unsigned int event_mask = 0;
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/* Save, Step 4:
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* Restore, Step 1:
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* Set the SPU_RdEventMsk channel to zero to mask
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* all events.
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*/
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spu_writech(SPU_WrEventMask, event_mask);
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}
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static inline void set_tag_mask(void)
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{
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unsigned int tag_mask = 1;
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/* Save, Step 5:
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* Restore, Step 2:
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* Set the SPU_WrTagMsk channel to '01' to unmask
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* only tag group 0.
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*/
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spu_writech(MFC_WrTagMask, tag_mask);
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}
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static inline void build_dma_list(addr64 lscsa_ea)
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{
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unsigned int ea_low;
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int i;
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/* Save, Step 6:
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* Restore, Step 3:
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* Update the effective address for the CSA in the
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* pre-canned DMA-list in local storage.
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*/
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ea_low = lscsa_ea.ui[1];
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ea_low += LSCSA_BYTE_OFFSET(ls[16384]);
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for (i = 0; i < 15; i++, ea_low += 16384) {
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dma_list[i].size = 16384;
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dma_list[i].ea_low = ea_low;
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}
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}
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static inline void enqueue_putllc(addr64 lscsa_ea)
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{
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unsigned int ls = 0;
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unsigned int size = 128;
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unsigned int tag_id = 0;
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unsigned int cmd = 0xB4; /* PUTLLC */
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/* Save, Step 12:
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* Restore, Step 7:
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* Send a PUTLLC (tag 0) command to the MFC using
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* an effective address in the CSA in order to
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* remove any possible lock-line reservation.
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*/
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spu_writech(MFC_LSA, ls);
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spu_writech(MFC_EAH, lscsa_ea.ui[0]);
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spu_writech(MFC_EAL, lscsa_ea.ui[1]);
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spu_writech(MFC_Size, size);
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spu_writech(MFC_TagID, tag_id);
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spu_writech(MFC_Cmd, cmd);
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}
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static inline void set_tag_update(void)
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{
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unsigned int update_any = 1;
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/* Save, Step 15:
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* Restore, Step 8:
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* Write the MFC_TagUpdate channel with '01'.
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*/
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spu_writech(MFC_WrTagUpdate, update_any);
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}
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static inline void read_tag_status(void)
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{
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/* Save, Step 16:
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* Restore, Step 9:
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* Read the MFC_TagStat channel data.
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*/
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spu_readch(MFC_RdTagStat);
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}
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static inline void read_llar_status(void)
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{
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/* Save, Step 17:
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* Restore, Step 10:
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* Read the MFC_AtomicStat channel data.
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*/
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spu_readch(MFC_RdAtomicStat);
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}
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#endif /* _SPU_CONTEXT_UTILS_H_ */
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