diff options
author | 2016-05-18 13:18:31 +0300 | |
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committer | 2016-05-18 13:42:15 +0300 | |
commit | 437fd90c0250dee670290f9b714253671a990160 (patch) | |
tree | b871786c360704244a07411c69fb58da9ead4a06 /qemu/include/hw/misc/mips_itu.h | |
parent | 5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff) |
These changes are the raw update to qemu-2.6.
Collission happened in the following patches:
migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)
The code provided by the patches was already in the upstreamed
version.
Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/include/hw/misc/mips_itu.h')
-rw-r--r-- | qemu/include/hw/misc/mips_itu.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/qemu/include/hw/misc/mips_itu.h b/qemu/include/hw/misc/mips_itu.h new file mode 100644 index 000000000..b3a453203 --- /dev/null +++ b/qemu/include/hw/misc/mips_itu.h @@ -0,0 +1,72 @@ +/* + * Inter-Thread Communication Unit emulation. + * + * Copyright (c) 2016 Imagination Technologies + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef MIPS_ITU_H +#define MIPS_ITU_H + +#define TYPE_MIPS_ITU "mips-itu" +#define MIPS_ITU(obj) OBJECT_CHECK(MIPSITUState, (obj), TYPE_MIPS_ITU) + +#define ITC_CELL_DEPTH_SHIFT 2 +#define ITC_CELL_DEPTH (1u << ITC_CELL_DEPTH_SHIFT) + +typedef struct ITCStorageCell { + struct { + uint8_t FIFODepth; /* Log2 of the cell depth */ + uint8_t FIFOPtr; /* Number of elements in a FIFO cell */ + uint8_t FIFO; /* 1 - FIFO cell, 0 - Semaphore cell */ + uint8_t T; /* Trap Bit */ + uint8_t F; /* Full Bit */ + uint8_t E; /* Empty Bit */ + } tag; + + /* Index of the oldest element in the queue */ + uint8_t fifo_out; + + /* Circular buffer for FIFO. Semaphore cells use index 0 only */ + uint64_t data[ITC_CELL_DEPTH]; + + /* Bitmap tracking blocked threads on the cell. + TODO: support >64 threads ? */ + uint64_t blocked_threads; +} ITCStorageCell; + +#define ITC_ADDRESSMAP_NUM 2 + +typedef struct MIPSITUState { + /*< private >*/ + SysBusDevice parent_obj; + /*< public >*/ + + int32_t num_fifo; + int32_t num_semaphores; + + /* ITC Storage */ + ITCStorageCell *cell; + MemoryRegion storage_io; + + /* ITC Configuration Tags */ + uint64_t ITCAddressMap[ITC_ADDRESSMAP_NUM]; + MemoryRegion tag_io; +} MIPSITUState; + +/* Get ITC Configuration Tag memory region. */ +MemoryRegion *mips_itu_get_tag_region(MIPSITUState *itu); + +#endif /* MIPS_ITU_H */ |