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Avoid unnecessary copying on MIPS.

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* grub-core/boot/decompressor/none.c (grub_decompress_core): Exit
	early if src == dest.
	* util/grub-mkimage.c (generate_image): Arange for src == dest if
	compression is none.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-05-17 21:40:35 +02:00
parent b772baedcd
commit 35341bbc96
3 changed files with 27 additions and 6 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2011-05-17 Vladimir Serbinenko <phcoder@gmail.com>
Avoid unnecessary copying on MIPS.
* grub-core/boot/decompressor/none.c (grub_decompress_core): Exit
early if src == dest.
* util/grub-mkimage.c (generate_image): Arange for src == dest if
compression is none.
2011-05-17 Vladimir Serbinenko <phcoder@gmail.com> 2011-05-17 Vladimir Serbinenko <phcoder@gmail.com>
Reduce memory footprint on SGI by putting modules before the kernel Reduce memory footprint on SGI by putting modules before the kernel

3
grub-core/boot/decompressor/none.c
View file

@ -25,6 +25,9 @@ grub_decompress_core (void *src, void *dest, unsigned long n,
char *d = (char *) dest; char *d = (char *) dest;
const char *s = (const char *) src; const char *s = (const char *) src;
if (d == s)
return;
if (d < s) if (d < s)
while (n--) while (n--)
*d++ = *s++; *d++ = *s++;

21
util/grub-mkimage.c
View file

@ -736,6 +736,7 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
grub_uint64_t start_address; grub_uint64_t start_address;
void *rel_section; void *rel_section;
grub_size_t reloc_size, align; grub_size_t reloc_size, align;
size_t decompress_size;
if (comp == COMPRESSION_AUTO) if (comp == COMPRESSION_AUTO)
comp = image_target->default_compression; comp = image_target->default_compression;
@ -913,7 +914,6 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
char *full_img; char *full_img;
size_t full_size; size_t full_size;
char *decompress_path, *decompress_img; char *decompress_path, *decompress_img;
size_t decompress_size;
const char *name; const char *name;
switch (comp) switch (comp)
@ -1410,9 +1410,13 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
size_t program_size; size_t program_size;
program_size = ALIGN_ADDR (core_size); program_size = ALIGN_ADDR (core_size);
target_addr = (image_target->link_addr if (comp == COMPRESSION_NONE)
- ALIGN_UP(total_module_size + core_size, 1048576) target_addr = (image_target->link_addr
- (1 << 20)); - total_module_size - decompress_size);
else
target_addr = (image_target->link_addr
- ALIGN_UP(total_module_size + core_size, 1048576)
- (1 << 20));
ecoff_img = xmalloc (program_size + sizeof (*head) + sizeof (*section)); ecoff_img = xmalloc (program_size + sizeof (*head) + sizeof (*section));
grub_memset (ecoff_img, 0, program_size + sizeof (*head) + sizeof (*section)); grub_memset (ecoff_img, 0, program_size + sizeof (*head) + sizeof (*section));
@ -1500,8 +1504,13 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
phdr->p_flags = grub_host_to_target32 (PF_R | PF_W | PF_X); phdr->p_flags = grub_host_to_target32 (PF_R | PF_W | PF_X);
if (image_target->id == IMAGE_LOONGSON_ELF) if (image_target->id == IMAGE_LOONGSON_ELF)
target_addr = ALIGN_UP (image_target->link_addr {
+ kernel_size + total_module_size, 32); if (comp == COMPRESSION_NONE)
target_addr = (image_target->link_addr - decompress_size);
else
target_addr = ALIGN_UP (image_target->link_addr
+ kernel_size + total_module_size, 32);
}
else else
target_addr = image_target->link_addr; target_addr = image_target->link_addr;
ehdr->e_entry = grub_host_to_target32 (target_addr); ehdr->e_entry = grub_host_to_target32 (target_addr);