2 * QEMU Cadence GEM emulation
4 * Copyright (c) 2011 Xilinx, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 #define TYPE_CADENCE_GEM "cadence_gem"
28 #define CADENCE_GEM(obj) OBJECT_CHECK(CadenceGEMState, (obj), TYPE_CADENCE_GEM)
31 #include "hw/sysbus.h"
33 #define CADENCE_GEM_MAXREG (0x00000800 / 4) /* Last valid GEM address */
35 #define MAX_PRIORITY_QUEUES 8
36 #define MAX_TYPE1_SCREENERS 16
37 #define MAX_TYPE2_SCREENERS 16
39 typedef struct CadenceGEMState
{
41 SysBusDevice parent_obj
;
47 qemu_irq irq
[MAX_PRIORITY_QUEUES
];
49 /* Static properties */
50 uint8_t num_priority_queues
;
51 uint8_t num_type1_screeners
;
52 uint8_t num_type2_screeners
;
55 /* GEM registers backing store */
56 uint32_t regs
[CADENCE_GEM_MAXREG
];
57 /* Mask of register bits which are write only */
58 uint32_t regs_wo
[CADENCE_GEM_MAXREG
];
59 /* Mask of register bits which are read only */
60 uint32_t regs_ro
[CADENCE_GEM_MAXREG
];
61 /* Mask of register bits which are clear on read */
62 uint32_t regs_rtc
[CADENCE_GEM_MAXREG
];
63 /* Mask of register bits which are write 1 to clear */
64 uint32_t regs_w1c
[CADENCE_GEM_MAXREG
];
66 /* PHY registers backing store */
67 uint16_t phy_regs
[32];
69 uint8_t phy_loop
; /* Are we in phy loopback? */
71 /* The current DMA descriptor pointers */
72 uint32_t rx_desc_addr
[MAX_PRIORITY_QUEUES
];
73 uint32_t tx_desc_addr
[MAX_PRIORITY_QUEUES
];
75 uint8_t can_rx_state
; /* Debug only */
77 unsigned rx_desc
[MAX_PRIORITY_QUEUES
][2];