1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
2e6b04fe0SSam Ravnborg /* Kernel module help for sparc64.
3e6b04fe0SSam Ravnborg *
4e6b04fe0SSam Ravnborg * Copyright (C) 2001 Rusty Russell.
5e6b04fe0SSam Ravnborg * Copyright (C) 2002 David S. Miller.
6e6b04fe0SSam Ravnborg */
7e6b04fe0SSam Ravnborg
8e6b04fe0SSam Ravnborg #include <linux/moduleloader.h>
9e6b04fe0SSam Ravnborg #include <linux/kernel.h>
10e6b04fe0SSam Ravnborg #include <linux/elf.h>
11e6b04fe0SSam Ravnborg #include <linux/vmalloc.h>
12e6b04fe0SSam Ravnborg #include <linux/fs.h>
135a0e3ad6STejun Heo #include <linux/gfp.h>
14e6b04fe0SSam Ravnborg #include <linux/string.h>
15e6b04fe0SSam Ravnborg #include <linux/ctype.h>
16e6b04fe0SSam Ravnborg #include <linux/mm.h>
17e6b04fe0SSam Ravnborg
18e6b04fe0SSam Ravnborg #include <asm/processor.h>
19e6b04fe0SSam Ravnborg #include <asm/spitfire.h>
20d550bbd4SDavid Howells #include <asm/cacheflush.h>
21e6b04fe0SSam Ravnborg
220b64120cSDavid S. Miller #include "entry.h"
230b64120cSDavid S. Miller
24e6b04fe0SSam Ravnborg #ifdef CONFIG_SPARC64
25dff9d3c2SDavid S. Miller
26dff9d3c2SDavid S. Miller #include <linux/jump_label.h>
27dff9d3c2SDavid S. Miller
module_map(unsigned long size)28e6b04fe0SSam Ravnborg static void *module_map(unsigned long size)
29e6b04fe0SSam Ravnborg {
30d0a21265SDavid Rientjes if (PAGE_ALIGN(size) > MODULES_LEN)
31e6b04fe0SSam Ravnborg return NULL;
32d0a21265SDavid Rientjes return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
33cb9e3c29SAndrey Ryabinin GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
34d0a21265SDavid Rientjes __builtin_return_address(0));
35e6b04fe0SSam Ravnborg }
36e6b04fe0SSam Ravnborg #else
module_map(unsigned long size)37e6b04fe0SSam Ravnborg static void *module_map(unsigned long size)
38e6b04fe0SSam Ravnborg {
39e6b04fe0SSam Ravnborg return vmalloc(size);
40e6b04fe0SSam Ravnborg }
41e6b04fe0SSam Ravnborg #endif /* CONFIG_SPARC64 */
42e6b04fe0SSam Ravnborg
module_alloc(unsigned long size)43e6b04fe0SSam Ravnborg void *module_alloc(unsigned long size)
44e6b04fe0SSam Ravnborg {
45e6b04fe0SSam Ravnborg void *ret;
46e6b04fe0SSam Ravnborg
47e6b04fe0SSam Ravnborg ret = module_map(size);
48a9e8d1a6SWei Yongjun if (ret)
49e6b04fe0SSam Ravnborg memset(ret, 0, size);
50e6b04fe0SSam Ravnborg
51e6b04fe0SSam Ravnborg return ret;
52e6b04fe0SSam Ravnborg }
53e6b04fe0SSam Ravnborg
54e6b04fe0SSam Ravnborg /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
module_frob_arch_sections(Elf_Ehdr * hdr,Elf_Shdr * sechdrs,char * secstrings,struct module * mod)55e6b04fe0SSam Ravnborg int module_frob_arch_sections(Elf_Ehdr *hdr,
56e6b04fe0SSam Ravnborg Elf_Shdr *sechdrs,
57e6b04fe0SSam Ravnborg char *secstrings,
58e6b04fe0SSam Ravnborg struct module *mod)
59e6b04fe0SSam Ravnborg {
60e6b04fe0SSam Ravnborg unsigned int symidx;
61e6b04fe0SSam Ravnborg Elf_Sym *sym;
62e6b04fe0SSam Ravnborg char *strtab;
63e6b04fe0SSam Ravnborg int i;
64e6b04fe0SSam Ravnborg
65e6b04fe0SSam Ravnborg for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
66e6b04fe0SSam Ravnborg if (symidx == hdr->e_shnum-1) {
67e6b04fe0SSam Ravnborg printk("%s: no symtab found.\n", mod->name);
68e6b04fe0SSam Ravnborg return -ENOEXEC;
69e6b04fe0SSam Ravnborg }
70e6b04fe0SSam Ravnborg }
71e6b04fe0SSam Ravnborg sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
72e6b04fe0SSam Ravnborg strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
73e6b04fe0SSam Ravnborg
74e6b04fe0SSam Ravnborg for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
75e6b04fe0SSam Ravnborg if (sym[i].st_shndx == SHN_UNDEF) {
761b35a57bSDavid S. Miller if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER)
77e6b04fe0SSam Ravnborg sym[i].st_shndx = SHN_ABS;
78e6b04fe0SSam Ravnborg }
79e6b04fe0SSam Ravnborg }
80e6b04fe0SSam Ravnborg return 0;
81e6b04fe0SSam Ravnborg }
82e6b04fe0SSam Ravnborg
apply_relocate_add(Elf_Shdr * sechdrs,const char * strtab,unsigned int symindex,unsigned int relsec,struct module * me)83e6b04fe0SSam Ravnborg int apply_relocate_add(Elf_Shdr *sechdrs,
84e6b04fe0SSam Ravnborg const char *strtab,
85e6b04fe0SSam Ravnborg unsigned int symindex,
86e6b04fe0SSam Ravnborg unsigned int relsec,
87e6b04fe0SSam Ravnborg struct module *me)
88e6b04fe0SSam Ravnborg {
89e6b04fe0SSam Ravnborg unsigned int i;
90e6b04fe0SSam Ravnborg Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
91e6b04fe0SSam Ravnborg Elf_Sym *sym;
92e6b04fe0SSam Ravnborg u8 *location;
93e6b04fe0SSam Ravnborg u32 *loc32;
94e6b04fe0SSam Ravnborg
95e6b04fe0SSam Ravnborg for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
96e6b04fe0SSam Ravnborg Elf_Addr v;
97e6b04fe0SSam Ravnborg
98e6b04fe0SSam Ravnborg /* This is where to make the change */
99e6b04fe0SSam Ravnborg location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
100e6b04fe0SSam Ravnborg + rel[i].r_offset;
101e6b04fe0SSam Ravnborg loc32 = (u32 *) location;
102e6b04fe0SSam Ravnborg
103e6b04fe0SSam Ravnborg #ifdef CONFIG_SPARC64
104e6b04fe0SSam Ravnborg BUG_ON(((u64)location >> (u64)32) != (u64)0);
105e6b04fe0SSam Ravnborg #endif /* CONFIG_SPARC64 */
106e6b04fe0SSam Ravnborg
107e6b04fe0SSam Ravnborg /* This is the symbol it is referring to. Note that all
108e6b04fe0SSam Ravnborg undefined symbols have been resolved. */
109e6b04fe0SSam Ravnborg sym = (Elf_Sym *)sechdrs[symindex].sh_addr
110e6b04fe0SSam Ravnborg + ELF_R_SYM(rel[i].r_info);
111e6b04fe0SSam Ravnborg v = sym->st_value + rel[i].r_addend;
112e6b04fe0SSam Ravnborg
113e6b04fe0SSam Ravnborg switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
114dfa520afSAndreas Larsson case R_SPARC_DISP32:
115dfa520afSAndreas Larsson v -= (Elf_Addr) location;
116dfa520afSAndreas Larsson *loc32 = v;
117dfa520afSAndreas Larsson break;
118e6b04fe0SSam Ravnborg #ifdef CONFIG_SPARC64
119e6b04fe0SSam Ravnborg case R_SPARC_64:
120e6b04fe0SSam Ravnborg location[0] = v >> 56;
121e6b04fe0SSam Ravnborg location[1] = v >> 48;
122e6b04fe0SSam Ravnborg location[2] = v >> 40;
123e6b04fe0SSam Ravnborg location[3] = v >> 32;
124e6b04fe0SSam Ravnborg location[4] = v >> 24;
125e6b04fe0SSam Ravnborg location[5] = v >> 16;
126e6b04fe0SSam Ravnborg location[6] = v >> 8;
127e6b04fe0SSam Ravnborg location[7] = v >> 0;
128e6b04fe0SSam Ravnborg break;
129e6b04fe0SSam Ravnborg
130e6b04fe0SSam Ravnborg case R_SPARC_WDISP19:
131e6b04fe0SSam Ravnborg v -= (Elf_Addr) location;
132e6b04fe0SSam Ravnborg *loc32 = (*loc32 & ~0x7ffff) |
133e6b04fe0SSam Ravnborg ((v >> 2) & 0x7ffff);
134e6b04fe0SSam Ravnborg break;
135e6b04fe0SSam Ravnborg
136e6b04fe0SSam Ravnborg case R_SPARC_OLO10:
137e6b04fe0SSam Ravnborg *loc32 = (*loc32 & ~0x1fff) |
138e6b04fe0SSam Ravnborg (((v & 0x3ff) +
139e6b04fe0SSam Ravnborg (ELF_R_TYPE(rel[i].r_info) >> 8))
140e6b04fe0SSam Ravnborg & 0x1fff);
141e6b04fe0SSam Ravnborg break;
142e6b04fe0SSam Ravnborg #endif /* CONFIG_SPARC64 */
143e6b04fe0SSam Ravnborg
144e6b04fe0SSam Ravnborg case R_SPARC_32:
145e6b04fe0SSam Ravnborg case R_SPARC_UA32:
146e6b04fe0SSam Ravnborg location[0] = v >> 24;
147e6b04fe0SSam Ravnborg location[1] = v >> 16;
148e6b04fe0SSam Ravnborg location[2] = v >> 8;
149e6b04fe0SSam Ravnborg location[3] = v >> 0;
150e6b04fe0SSam Ravnborg break;
151e6b04fe0SSam Ravnborg
152e6b04fe0SSam Ravnborg case R_SPARC_WDISP30:
153e6b04fe0SSam Ravnborg v -= (Elf_Addr) location;
154e6b04fe0SSam Ravnborg *loc32 = (*loc32 & ~0x3fffffff) |
155e6b04fe0SSam Ravnborg ((v >> 2) & 0x3fffffff);
156e6b04fe0SSam Ravnborg break;
157e6b04fe0SSam Ravnborg
158e6b04fe0SSam Ravnborg case R_SPARC_WDISP22:
159e6b04fe0SSam Ravnborg v -= (Elf_Addr) location;
160e6b04fe0SSam Ravnborg *loc32 = (*loc32 & ~0x3fffff) |
161e6b04fe0SSam Ravnborg ((v >> 2) & 0x3fffff);
162e6b04fe0SSam Ravnborg break;
163e6b04fe0SSam Ravnborg
164e6b04fe0SSam Ravnborg case R_SPARC_LO10:
165e6b04fe0SSam Ravnborg *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
166e6b04fe0SSam Ravnborg break;
167e6b04fe0SSam Ravnborg
168e6b04fe0SSam Ravnborg case R_SPARC_HI22:
169e6b04fe0SSam Ravnborg *loc32 = (*loc32 & ~0x3fffff) |
170e6b04fe0SSam Ravnborg ((v >> 10) & 0x3fffff);
171e6b04fe0SSam Ravnborg break;
172e6b04fe0SSam Ravnborg
173e6b04fe0SSam Ravnborg default:
174e6b04fe0SSam Ravnborg printk(KERN_ERR "module %s: Unknown relocation: %x\n",
175e6b04fe0SSam Ravnborg me->name,
176e6b04fe0SSam Ravnborg (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
177e6b04fe0SSam Ravnborg return -ENOEXEC;
1786cb79b3fSJoe Perches }
179e6b04fe0SSam Ravnborg }
180e6b04fe0SSam Ravnborg return 0;
181e6b04fe0SSam Ravnborg }
182e6b04fe0SSam Ravnborg
183e6b04fe0SSam Ravnborg #ifdef CONFIG_SPARC64
do_patch_sections(const Elf_Ehdr * hdr,const Elf_Shdr * sechdrs)1840b64120cSDavid S. Miller static void do_patch_sections(const Elf_Ehdr *hdr,
1850b64120cSDavid S. Miller const Elf_Shdr *sechdrs)
1860b64120cSDavid S. Miller {
1870b64120cSDavid S. Miller const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
1880b64120cSDavid S. Miller char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
1890b64120cSDavid S. Miller
1900b64120cSDavid S. Miller for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
1910b64120cSDavid S. Miller if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
1920b64120cSDavid S. Miller sun4v_1insn = s;
1930b64120cSDavid S. Miller if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
1940b64120cSDavid S. Miller sun4v_2insn = s;
1950b64120cSDavid S. Miller }
1960b64120cSDavid S. Miller
1970b64120cSDavid S. Miller if (sun4v_1insn && tlb_type == hypervisor) {
1980b64120cSDavid S. Miller void *p = (void *) sun4v_1insn->sh_addr;
1990b64120cSDavid S. Miller sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
2000b64120cSDavid S. Miller }
2010b64120cSDavid S. Miller if (sun4v_2insn && tlb_type == hypervisor) {
2020b64120cSDavid S. Miller void *p = (void *) sun4v_2insn->sh_addr;
2030b64120cSDavid S. Miller sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
2040b64120cSDavid S. Miller }
2050b64120cSDavid S. Miller }
2060b64120cSDavid S. Miller
module_finalize(const Elf_Ehdr * hdr,const Elf_Shdr * sechdrs,struct module * me)207e6b04fe0SSam Ravnborg int module_finalize(const Elf_Ehdr *hdr,
208e6b04fe0SSam Ravnborg const Elf_Shdr *sechdrs,
209e6b04fe0SSam Ravnborg struct module *me)
210e6b04fe0SSam Ravnborg {
2110b64120cSDavid S. Miller do_patch_sections(hdr, sechdrs);
2120b64120cSDavid S. Miller
213e6b04fe0SSam Ravnborg /* Cheetah's I-cache is fully coherent. */
214e6b04fe0SSam Ravnborg if (tlb_type == spitfire) {
215e6b04fe0SSam Ravnborg unsigned long va;
216e6b04fe0SSam Ravnborg
217e6b04fe0SSam Ravnborg flushw_all();
218e6b04fe0SSam Ravnborg for (va = 0; va < (PAGE_SIZE << 1); va += 32)
219e6b04fe0SSam Ravnborg spitfire_put_icache_tag(va, 0x0);
220e6b04fe0SSam Ravnborg __asm__ __volatile__("flush %g6");
221e6b04fe0SSam Ravnborg }
222e6b04fe0SSam Ravnborg
223e6b04fe0SSam Ravnborg return 0;
224e6b04fe0SSam Ravnborg }
225e6b04fe0SSam Ravnborg #endif /* CONFIG_SPARC64 */
226