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[Blackfin] arch: move the init sections to the end of memory

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Move the init sections to the end of memory so that after they
are free, run time memory is all continugous - this should help decrease
memory fragementation.

When doing this, we also pack some of the other sections a little closer
together, to make sure we don't waste memory. To make this happen,
we need to rename the .data.init_task section to .init_task.data, so
it doesn't get picked up by the linker script glob.

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Mike Frysinger
2008-02-02 15:53:17 +08:00
committed by Bryan Wu
parent 80f31c8a03
commit b7627acc43
3 changed files with 36 additions and 27 deletions
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14
arch/blackfin/kernel/setup.c
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@@ -427,7 +427,7 @@ static __init void parse_cmdline_early(char *cmdline_p)
static __init void memory_setup(void)
{
_rambase = (unsigned long)_stext;
_ramstart = (unsigned long)__bss_stop;
_ramstart = (unsigned long)_end;
if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
console_init();
@@ -489,7 +489,7 @@ static __init void memory_setup(void)
}
/* Relocate MTD image to the top of memory after the uncached memory area */
dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
dma_memcpy((char *)memory_end, _end, mtd_size);
memory_mtd_start = memory_end;
_ebss = memory_mtd_start; /* define _ebss for compatible */
@@ -528,13 +528,13 @@ static __init void memory_setup(void)
printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
printk( KERN_INFO "Memory map:\n"
printk(KERN_INFO "Memory map:\n"
KERN_INFO " text = 0x%p-0x%p\n"
KERN_INFO " rodata = 0x%p-0x%p\n"
KERN_INFO " bss = 0x%p-0x%p\n"
KERN_INFO " data = 0x%p-0x%p\n"
KERN_INFO " stack = 0x%p-0x%p\n"
KERN_INFO " init = 0x%p-0x%p\n"
KERN_INFO " bss = 0x%p-0x%p\n"
KERN_INFO " available = 0x%p-0x%p\n"
#ifdef CONFIG_MTD_UCLINUX
KERN_INFO " rootfs = 0x%p-0x%p\n"
@@ -544,12 +544,12 @@ static __init void memory_setup(void)
#endif
, _stext, _etext,
__start_rodata, __end_rodata,
__bss_start, __bss_stop,
_sdata, _edata,
(void *)&init_thread_union,
(void *)((int)(&init_thread_union) + 0x2000),
__init_begin, __init_end,
__bss_start, __bss_stop,
(void *)_ramstart, (void *)memory_end
__init_begin, __init_end,
(void *)_ramstart, (void *)memory_end
#ifdef CONFIG_MTD_UCLINUX
, (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
#endif