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-rw-r--r--arch/blackfin/kernel/module.c478
1 files changed, 169 insertions, 309 deletions
diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c
index 8b9fe29d03f..4489efc5288 100644
--- a/arch/blackfin/kernel/module.c
+++ b/arch/blackfin/kernel/module.c
@@ -1,32 +1,10 @@
/*
- * File: arch/blackfin/kernel/module.c
- * Based on:
- * Author:
+ * Copyright 2004-2009 Analog Devices Inc.
*
- * Created:
- * Description:
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Licensed under the GPL-2 or later
*/
+#define pr_fmt(fmt) "module %s: " fmt, mod->name
#include <linux/moduleloader.h>
#include <linux/elf.h>
@@ -36,215 +14,127 @@
#include <linux/kernel.h>
#include <asm/dma.h>
#include <asm/cacheflush.h>
-
-/*
- * handle arithmetic relocations.
- * See binutils/bfd/elf32-bfin.c for more details
- */
-#define RELOC_STACK_SIZE 100
-static uint32_t reloc_stack[RELOC_STACK_SIZE];
-static unsigned int reloc_stack_tos;
-
-#define is_reloc_stack_empty() ((reloc_stack_tos > 0)?0:1)
-
-static void reloc_stack_push(uint32_t value)
-{
- reloc_stack[reloc_stack_tos++] = value;
-}
-
-static uint32_t reloc_stack_pop(void)
-{
- return reloc_stack[--reloc_stack_tos];
-}
-
-static uint32_t reloc_stack_operate(unsigned int oper, struct module *mod)
-{
- uint32_t value;
-
- switch (oper) {
- case R_add:
- value = reloc_stack[reloc_stack_tos - 2] +
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_sub:
- value = reloc_stack[reloc_stack_tos - 2] -
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_mult:
- value = reloc_stack[reloc_stack_tos - 2] *
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_div:
- value = reloc_stack[reloc_stack_tos - 2] /
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_mod:
- value = reloc_stack[reloc_stack_tos - 2] %
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_lshift:
- value = reloc_stack[reloc_stack_tos - 2] <<
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_rshift:
- value = reloc_stack[reloc_stack_tos - 2] >>
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_and:
- value = reloc_stack[reloc_stack_tos - 2] &
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_or:
- value = reloc_stack[reloc_stack_tos - 2] |
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_xor:
- value = reloc_stack[reloc_stack_tos - 2] ^
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_land:
- value = reloc_stack[reloc_stack_tos - 2] &&
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_lor:
- value = reloc_stack[reloc_stack_tos - 2] ||
- reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 2;
- break;
- case R_neg:
- value = -reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos--;
- break;
- case R_comp:
- value = ~reloc_stack[reloc_stack_tos - 1];
- reloc_stack_tos -= 1;
- break;
- default:
- printk(KERN_WARNING "module %s: unhandled reloction\n",
- mod->name);
- return 0;
- }
-
- /* now push the new value back on stack */
- reloc_stack_push(value);
-
- return value;
-}
-
-void *module_alloc(unsigned long size)
-{
- if (size == 0)
- return NULL;
- return vmalloc(size);
-}
-
-/* Free memory returned from module_alloc */
-void module_free(struct module *mod, void *module_region)
-{
- vfree(module_region);
-}
+#include <asm/uaccess.h>
/* Transfer the section to the L1 memory */
int
-module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs,
+module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
char *secstrings, struct module *mod)
{
+ /*
+ * XXX: sechdrs are vmalloced in kernel/module.c
+ * and would be vfreed just after module is loaded,
+ * so we hack to keep the only information we needed
+ * in mod->arch to correctly free L1 I/D sram later.
+ * NOTE: this breaks the semantic of mod->arch structure.
+ */
Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
- void *dest = NULL;
+ void *dest;
for (s = sechdrs; s < sechdrs_end; ++s) {
- if ((strcmp(".l1.text", secstrings + s->sh_name) == 0) ||
- ((strcmp(".text", secstrings + s->sh_name) == 0) &&
- (hdr->e_flags & FLG_CODE_IN_L1) && (s->sh_size > 0))) {
- mod->arch.text_l1 = s;
+ const char *shname = secstrings + s->sh_name;
+
+ if (s->sh_size == 0)
+ continue;
+
+ if (!strcmp(".l1.text", shname) ||
+ (!strcmp(".text", shname) &&
+ (hdr->e_flags & EF_BFIN_CODE_IN_L1))) {
+
dest = l1_inst_sram_alloc(s->sh_size);
+ mod->arch.text_l1 = dest;
if (dest == NULL) {
- printk(KERN_ERR
- "module %s: L1 instruction memory allocation failed\n",
- mod->name);
+ pr_err("L1 inst memory allocation failed\n");
return -1;
}
dma_memcpy(dest, (void *)s->sh_addr, s->sh_size);
- s->sh_flags &= ~SHF_ALLOC;
- s->sh_addr = (unsigned long)dest;
- }
- if ((strcmp(".l1.data", secstrings + s->sh_name) == 0) ||
- ((strcmp(".data", secstrings + s->sh_name) == 0) &&
- (hdr->e_flags & FLG_DATA_IN_L1) && (s->sh_size > 0))) {
- mod->arch.data_a_l1 = s;
+
+ } else if (!strcmp(".l1.data", shname) ||
+ (!strcmp(".data", shname) &&
+ (hdr->e_flags & EF_BFIN_DATA_IN_L1))) {
+
dest = l1_data_sram_alloc(s->sh_size);
+ mod->arch.data_a_l1 = dest;
if (dest == NULL) {
- printk(KERN_ERR
- "module %s: L1 data memory allocation failed\n",
- mod->name);
+ pr_err("L1 data memory allocation failed\n");
return -1;
}
memcpy(dest, (void *)s->sh_addr, s->sh_size);
- s->sh_flags &= ~SHF_ALLOC;
- s->sh_addr = (unsigned long)dest;
- }
- if (strcmp(".l1.bss", secstrings + s->sh_name) == 0 ||
- ((strcmp(".bss", secstrings + s->sh_name) == 0) &&
- (hdr->e_flags & FLG_DATA_IN_L1) && (s->sh_size > 0))) {
- mod->arch.bss_a_l1 = s;
- dest = l1_data_sram_alloc(s->sh_size);
+
+ } else if (!strcmp(".l1.bss", shname) ||
+ (!strcmp(".bss", shname) &&
+ (hdr->e_flags & EF_BFIN_DATA_IN_L1))) {
+
+ dest = l1_data_sram_zalloc(s->sh_size);
+ mod->arch.bss_a_l1 = dest;
if (dest == NULL) {
- printk(KERN_ERR
- "module %s: L1 data memory allocation failed\n",
- mod->name);
+ pr_err("L1 data memory allocation failed\n");
return -1;
}
- memset(dest, 0, s->sh_size);
- s->sh_flags &= ~SHF_ALLOC;
- s->sh_addr = (unsigned long)dest;
- }
- if (strcmp(".l1.data.B", secstrings + s->sh_name) == 0) {
- mod->arch.data_b_l1 = s;
+
+ } else if (!strcmp(".l1.data.B", shname)) {
+
dest = l1_data_B_sram_alloc(s->sh_size);
+ mod->arch.data_b_l1 = dest;
if (dest == NULL) {
- printk(KERN_ERR
- "module %s: L1 data memory allocation failed\n",
- mod->name);
+ pr_err("L1 data memory allocation failed\n");
return -1;
}
memcpy(dest, (void *)s->sh_addr, s->sh_size);
- s->sh_flags &= ~SHF_ALLOC;
- s->sh_addr = (unsigned long)dest;
- }
- if (strcmp(".l1.bss.B", secstrings + s->sh_name) == 0) {
- mod->arch.bss_b_l1 = s;
+
+ } else if (!strcmp(".l1.bss.B", shname)) {
+
dest = l1_data_B_sram_alloc(s->sh_size);
+ mod->arch.bss_b_l1 = dest;
if (dest == NULL) {
- printk(KERN_ERR
- "module %s: L1 data memory allocation failed\n",
- mod->name);
+ pr_err("L1 data memory allocation failed\n");
return -1;
}
memset(dest, 0, s->sh_size);
- s->sh_flags &= ~SHF_ALLOC;
- s->sh_addr = (unsigned long)dest;
- }
+
+ } else if (!strcmp(".l2.text", shname) ||
+ (!strcmp(".text", shname) &&
+ (hdr->e_flags & EF_BFIN_CODE_IN_L2))) {
+
+ dest = l2_sram_alloc(s->sh_size);
+ mod->arch.text_l2 = dest;
+ if (dest == NULL) {
+ pr_err("L2 SRAM allocation failed\n");
+ return -1;
+ }
+ memcpy(dest, (void *)s->sh_addr, s->sh_size);
+
+ } else if (!strcmp(".l2.data", shname) ||
+ (!strcmp(".data", shname) &&
+ (hdr->e_flags & EF_BFIN_DATA_IN_L2))) {
+
+ dest = l2_sram_alloc(s->sh_size);
+ mod->arch.data_l2 = dest;
+ if (dest == NULL) {
+ pr_err("L2 SRAM allocation failed\n");
+ return -1;
+ }
+ memcpy(dest, (void *)s->sh_addr, s->sh_size);
+
+ } else if (!strcmp(".l2.bss", shname) ||
+ (!strcmp(".bss", shname) &&
+ (hdr->e_flags & EF_BFIN_DATA_IN_L2))) {
+
+ dest = l2_sram_zalloc(s->sh_size);
+ mod->arch.bss_l2 = dest;
+ if (dest == NULL) {
+ pr_err("L2 SRAM allocation failed\n");
+ return -1;
+ }
+
+ } else
+ continue;
+
+ s->sh_flags &= ~SHF_ALLOC;
+ s->sh_addr = (unsigned long)dest;
}
- return 0;
-}
-int
-apply_relocate(Elf_Shdr * sechdrs, const char *strtab,
- unsigned int symindex, unsigned int relsec, struct module *me)
-{
- printk(KERN_ERR "module %s: .rel unsupported\n", me->name);
- return -ENOEXEC;
+ return 0;
}
/*************************************************************************/
@@ -254,127 +144,89 @@ apply_relocate(Elf_Shdr * sechdrs, const char *strtab,
/* Arithmetic relocations are handled. */
/* We do not expect LSETUP to be split and hence is not */
/* handled. */
-/* R_byte and R_byte2 are also not handled as the gas */
-/* does not generate it. */
+/* R_BFIN_BYTE and R_BFIN_BYTE2 are also not handled as the */
+/* gas does not generate it. */
/*************************************************************************/
int
-apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab,
+apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
unsigned int symindex, unsigned int relsec,
struct module *mod)
{
unsigned int i;
- unsigned short tmp;
Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
Elf32_Sym *sym;
- uint32_t *location32;
- uint16_t *location16;
- uint32_t value;
+ unsigned long location, value, size;
+
+ pr_debug("applying relocate section %u to %u\n",
+ relsec, sechdrs[relsec].sh_info);
- pr_debug("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
/* This is where to make the change */
- location16 =
- (uint16_t *) (sechdrs[sechdrs[relsec].sh_info].sh_addr +
- rel[i].r_offset);
- location32 = (uint32_t *) location16;
+ location = sechdrs[sechdrs[relsec].sh_info].sh_addr +
+ rel[i].r_offset;
+
/* This is the symbol it is referring to. Note that all
undefined symbols have been resolved. */
sym = (Elf32_Sym *) sechdrs[symindex].sh_addr
+ ELF32_R_SYM(rel[i].r_info);
- if (is_reloc_stack_empty()) {
- value = sym->st_value;
- } else {
- value = reloc_stack_pop();
- }
+ value = sym->st_value;
value += rel[i].r_addend;
- pr_debug("location is %x, value is %x type is %d \n",
- (unsigned int) location32, value,
- ELF32_R_TYPE(rel[i].r_info));
+
+#ifdef CONFIG_SMP
+ if (location >= COREB_L1_DATA_A_START) {
+ pr_err("cannot relocate in L1: %u (SMP kernel)\n",
+ ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+#endif
+
+ pr_debug("location is %lx, value is %lx type is %d\n",
+ location, value, ELF32_R_TYPE(rel[i].r_info));
switch (ELF32_R_TYPE(rel[i].r_info)) {
- case R_pcrel24:
- case R_pcrel24_jump_l:
- /* Add the value, subtract its postition */
- location16 =
- (uint16_t *) (sechdrs[sechdrs[relsec].sh_info].
- sh_addr + rel[i].r_offset - 2);
- location32 = (uint32_t *) location16;
- value -= (uint32_t) location32;
- value >>= 1;
- pr_debug("value is %x, before %x-%x after %x-%x\n", value,
- *location16, *(location16 + 1),
- (*location16 & 0xff00) | (value >> 16 & 0x00ff),
- value & 0xffff);
- *location16 =
- (*location16 & 0xff00) | (value >> 16 & 0x00ff);
- *(location16 + 1) = value & 0xffff;
+ case R_BFIN_HUIMM16:
+ value >>= 16;
+ case R_BFIN_LUIMM16:
+ case R_BFIN_RIMM16:
+ size = 2;
break;
- case R_pcrel12_jump:
- case R_pcrel12_jump_s:
- value -= (uint32_t) location32;
- value >>= 1;
- *location16 = (value & 0xfff);
+ case R_BFIN_BYTE4_DATA:
+ size = 4;
break;
- case R_pcrel10:
- value -= (uint32_t) location32;
- value >>= 1;
- *location16 = (value & 0x3ff);
- break;
- case R_luimm16:
- pr_debug("before %x after %x\n", *location16,
- (value & 0xffff));
- tmp = (value & 0xffff);
- if ((unsigned long)location16 >= L1_CODE_START) {
- dma_memcpy(location16, &tmp, 2);
- } else
- *location16 = tmp;
- break;
- case R_huimm16:
- pr_debug("before %x after %x\n", *location16,
- ((value >> 16) & 0xffff));
- tmp = ((value >> 16) & 0xffff);
- if ((unsigned long)location16 >= L1_CODE_START) {
- dma_memcpy(location16, &tmp, 2);
- } else
- *location16 = tmp;
- break;
- case R_rimm16:
- *location16 = (value & 0xffff);
- break;
- case R_byte4_data:
- pr_debug("before %x after %x\n", *location32, value);
- *location32 = value;
- break;
- case R_push:
- reloc_stack_push(value);
+
+ case R_BFIN_PCREL24:
+ case R_BFIN_PCREL24_JUMP_L:
+ case R_BFIN_PCREL12_JUMP:
+ case R_BFIN_PCREL12_JUMP_S:
+ case R_BFIN_PCREL10:
+ pr_err("unsupported relocation: %u (no -mlong-calls?)\n",
+ ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+
+ default:
+ pr_err("unknown relocation: %u\n",
+ ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+
+ switch (bfin_mem_access_type(location, size)) {
+ case BFIN_MEM_ACCESS_CORE:
+ case BFIN_MEM_ACCESS_CORE_ONLY:
+ memcpy((void *)location, &value, size);
break;
- case R_const:
- reloc_stack_push(rel[i].r_addend);
+ case BFIN_MEM_ACCESS_DMA:
+ dma_memcpy((void *)location, &value, size);
break;
- case R_add:
- case R_sub:
- case R_mult:
- case R_div:
- case R_mod:
- case R_lshift:
- case R_rshift:
- case R_and:
- case R_or:
- case R_xor:
- case R_land:
- case R_lor:
- case R_neg:
- case R_comp:
- reloc_stack_operate(ELF32_R_TYPE(rel[i].r_info), mod);
+ case BFIN_MEM_ACCESS_ITEST:
+ isram_memcpy((void *)location, &value, size);
break;
default:
- printk(KERN_ERR "module %s: Unknown relocation: %u\n",
- mod->name, ELF32_R_TYPE(rel[i].r_info));
+ pr_err("invalid relocation for %#lx\n", location);
return -ENOEXEC;
}
}
+
return 0;
}
@@ -384,6 +236,7 @@ module_finalize(const Elf_Ehdr * hdr,
{
unsigned int i, strindex = 0, symindex = 0;
char *secstrings;
+ long err = 0;
secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
@@ -398,32 +251,39 @@ module_finalize(const Elf_Ehdr * hdr,
for (i = 1; i < hdr->e_shnum; i++) {
const char *strtab = (char *)sechdrs[strindex].sh_addr;
unsigned int info = sechdrs[i].sh_info;
+ const char *shname = secstrings + sechdrs[i].sh_name;
/* Not a valid relocation section? */
if (info >= hdr->e_shnum)
continue;
- if ((sechdrs[i].sh_type == SHT_RELA) &&
- ((strcmp(".rela.l1.text", secstrings + sechdrs[i].sh_name) == 0) ||
- ((strcmp(".rela.text", secstrings + sechdrs[i].sh_name) == 0) &&
- (hdr->e_flags & FLG_CODE_IN_L1)))) {
- apply_relocate_add((Elf_Shdr *) sechdrs, strtab,
+ /* Only support RELA relocation types */
+ if (sechdrs[i].sh_type != SHT_RELA)
+ continue;
+
+ if (!strcmp(".rela.l2.text", shname) ||
+ !strcmp(".rela.l1.text", shname) ||
+ (!strcmp(".rela.text", shname) &&
+ (hdr->e_flags & (EF_BFIN_CODE_IN_L1 | EF_BFIN_CODE_IN_L2)))) {
+
+ err = apply_relocate_add((Elf_Shdr *) sechdrs, strtab,
symindex, i, mod);
+ if (err < 0)
+ return -ENOEXEC;
}
}
+
return 0;
}
void module_arch_cleanup(struct module *mod)
{
- if ((mod->arch.text_l1) && (mod->arch.text_l1->sh_addr))
- l1_inst_sram_free((void *)mod->arch.text_l1->sh_addr);
- if ((mod->arch.data_a_l1) && (mod->arch.data_a_l1->sh_addr))
- l1_data_sram_free((void *)mod->arch.data_a_l1->sh_addr);
- if ((mod->arch.bss_a_l1) && (mod->arch.bss_a_l1->sh_addr))
- l1_data_sram_free((void *)mod->arch.bss_a_l1->sh_addr);
- if ((mod->arch.data_b_l1) && (mod->arch.data_b_l1->sh_addr))
- l1_data_B_sram_free((void *)mod->arch.data_b_l1->sh_addr);
- if ((mod->arch.bss_b_l1) && (mod->arch.bss_b_l1->sh_addr))
- l1_data_B_sram_free((void *)mod->arch.bss_b_l1->sh_addr);
+ l1_inst_sram_free(mod->arch.text_l1);
+ l1_data_A_sram_free(mod->arch.data_a_l1);
+ l1_data_A_sram_free(mod->arch.bss_a_l1);
+ l1_data_B_sram_free(mod->arch.data_b_l1);
+ l1_data_B_sram_free(mod->arch.bss_b_l1);
+ l2_sram_free(mod->arch.text_l2);
+ l2_sram_free(mod->arch.data_l2);
+ l2_sram_free(mod->arch.bss_l2);
}
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