1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2024 Rivos, Inc
4 */
5
6 #include <asm/vendorid_list.h>
7 #include <asm/vendor_extensions.h>
8 #include <asm/vendor_extensions/andes.h>
9
10 #include <linux/array_size.h>
11 #include <linux/types.h>
12
13 struct riscv_isa_vendor_ext_data_list *riscv_isa_vendor_ext_list[] = {
14 #ifdef CONFIG_RISCV_ISA_VENDOR_EXT_ANDES
15 &riscv_isa_vendor_ext_list_andes,
16 #endif
17 };
18
19 const size_t riscv_isa_vendor_ext_list_size = ARRAY_SIZE(riscv_isa_vendor_ext_list);
20
21 /**
22 * __riscv_isa_vendor_extension_available() - Check whether given vendor
23 * extension is available or not.
24 *
25 * @cpu: check if extension is available on this cpu
26 * @vendor: vendor that the extension is a member of
27 * @bit: bit position of the desired extension
28 * Return: true or false
29 *
30 * NOTE: When cpu is -1, will check if extension is available on all cpus
31 */
32 bool __riscv_isa_vendor_extension_available(int cpu, unsigned long vendor, unsigned int bit)
33 {
34 struct riscv_isavendorinfo *bmap;
35 struct riscv_isavendorinfo *cpu_bmap;
36
37 switch (vendor) {
38 #ifdef CONFIG_RISCV_ISA_VENDOR_EXT_ANDES
39 case ANDES_VENDOR_ID:
40 bmap = &riscv_isa_vendor_ext_list_andes.all_harts_isa_bitmap;
41 cpu_bmap = riscv_isa_vendor_ext_list_andes.per_hart_isa_bitmap;
42 break;
43 #endif
44 default:
45 return false;
46 }
47
48 if (cpu != -1)
49 bmap = &cpu_bmap[cpu];
50
51 if (bit >= RISCV_ISA_VENDOR_EXT_MAX)
52 return false;
53
54 return test_bit(bit, bmap->isa) ? true : false;
55 }
56 EXPORT_SYMBOL_GPL(__riscv_isa_vendor_extension_available);
57
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