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1 /*
2 * K230 Decompress Engine
3 *
4 * Copyright (c) 2026 Tao Ding <dingtao0430@163.com>
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8
9 #ifndef HW_MISC_K230_DECOMP_GZIP_H
10 #define HW_MISC_K230_DECOMP_GZIP_H
11
12 #include <zlib.h>
13 #include "hw/core/sysbus.h"
14
15 #define TYPE_K230_DECOMP_GZIP "riscv.k230.decomp-gzip"
16 OBJECT_DECLARE_SIMPLE_TYPE(K230DecompGzipState, K230_DECOMP_GZIP)
17
18 /* K230 DECOMP GZIP ACK input */
19 enum {
20 K230_DECOMP_GZIP_GPIO_DMA_WRITE_ACK,
21 K230_DECOMP_GZIP_GPIO_DMA_READ_ACK,
22 K230_DECOMP_GZIP_NUM_GPIOS_IN,
23 };
24
25 /* K230 DECOMP GZIP REQ output */
26 enum {
27 K230_DECOMP_GZIP_GPIO_DECOMP_CTRL_EN,
28 K230_DECOMP_GZIP_GPIO_DMA_WRITE_REQ,
29 K230_DECOMP_GZIP_GPIO_DMA_READ_REQ,
30 K230_DECOMP_GZIP_NUM_GPIOS_OUT,
31 };
32
33 #define K230_DECOMP_GZIP_MMIO_SIZE 0x4000
34
35 /* K230 DECOMP GZIP Registers map */
36 /* Start decompression controller */
37 #define K230_DECOMP_GZIP_DECOMP_START 0x00
38 /* Source data length register */
39 #define K230_DECOMP_GZIP_GZIP_SRC_SIZE 0x04
40 /* Output data length register */
41 #define K230_DECOMP_GZIP_GZIP_OUT_SIZE 0x08
42 /* Decompress status register */
43 #define K230_DECOMP_GZIP_DECOMP_STAT 0x0c
44
45 /* Start decompression controller */
46 #define K230_DECOMP_GZIP_START (1U << 0)
47
48 #define K230_DECOMP_GZIP_CTRL_EN (1U << 31)
49 #define K230_DECOMP_GZIP_DMA_IN_MASK 0x7fffffffU
50
51 #define K230_DECOMP_GZIP_STAT_CRC_OK (1U << 10)
52 #define K230_DECOMP_GZIP_STAT_STATE_MASK 0xfU
53
54 #define K230_DECOMP_GZIP_BLOCK_SIZE 0x00020000
55 #define K230_DECOMP_GZIP_SRAM_IN_BASE 0x80000
56 #define K230_DECOMP_GZIP_SRAM_OUT_BASE 0
57
58 typedef struct K230DecompGzipSlotState {
59 uint32_t slot; /* Slot index */
60 /*
61 * Data offset in current slot.
62 * First valid data in input buffer. Last valid data in output buffer.
63 */
64 uint32_t current_offset;
65 } K230DecompGzipSlotState;
66
67 struct K230DecompGzipState {
68 SysBusDevice parent_obj;
69
70 MemoryRegion iomem;
71 hwaddr sram_base;
72 qemu_irq signal_out[K230_DECOMP_GZIP_NUM_GPIOS_OUT];
73 uint32_t decomp_start;
74 uint32_t gzip_src_size;
75 uint32_t gzip_out_size;
76 uint32_t decomp_stat;
77 K230DecompGzipSlotState input; /* decomp gzip ring input */
78 K230DecompGzipSlotState output; /* decomp gzip ring output */
79 uint32_t total_requested;
80 uint32_t total_produced;
81 bool active;
82 bool in_kick;
83 bool zstream_inited;
84 bool stream_end;
85 /* Read from ring input. */
86 uint8_t input_buf[K230_DECOMP_GZIP_BLOCK_SIZE];
87 /* Write to ring output. */
88 uint8_t output_buf[K230_DECOMP_GZIP_BLOCK_SIZE];
89 z_stream zs;
90 };
91
92 #endif