kernel-ark/arch/tile/kernel/vmlinux.lds.S
Chris Metcalf ce61cdc270 tile: make __write_once a synonym for __read_mostly
This was really only useful for TILE64 when we mapped the
kernel data with small pages. Now we use a huge page and we
really don't want to map different parts of the kernel
data in different ways.

We retain the __write_once name in case we want to bring
it back to life at some point in the future.

Note that this change uncovered a latent bug where the
"smp_topology" variable happened to always be aligned mod 8
so we could store two "int" values at once, but when we
eliminated __write_once it ended up only aligned mod 4.
Fix with an explicit annotation.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:32 -04:00

93 lines
1.9 KiB
ArmAsm

#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/thread_info.h>
#include <hv/hypervisor.h>
/* Text loads starting from the supervisor interrupt vector address. */
#define TEXT_OFFSET MEM_SV_START
OUTPUT_ARCH(tile)
ENTRY(_start)
jiffies = jiffies_64;
PHDRS
{
intrpt PT_LOAD ;
text PT_LOAD ;
data PT_LOAD ;
}
SECTIONS
{
/* Text is loaded with a different VA than data; start with text. */
#undef LOAD_OFFSET
#define LOAD_OFFSET TEXT_OFFSET
/* Interrupt vectors */
.intrpt (LOAD_OFFSET) : AT ( 0 ) /* put at the start of physical memory */
{
_text = .;
*(.intrpt)
} :intrpt =0
/* Hypervisor call vectors */
. = ALIGN(0x10000);
.hvglue : AT (ADDR(.hvglue) - LOAD_OFFSET) {
*(.hvglue)
} :NONE
/* Now the real code */
. = ALIGN(0x20000);
_stext = .;
.text : AT (ADDR(.text) - LOAD_OFFSET) {
HEAD_TEXT
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
IRQENTRY_TEXT
__fix_text_end = .; /* tile-cpack won't rearrange before this */
ALIGN_FUNCTION();
*(.hottext*)
TEXT_TEXT
*(.text.*)
*(.coldtext*)
*(.fixup)
*(.gnu.warning)
} :text =0
_etext = .;
/* "Init" is divided into two areas with very different virtual addresses. */
INIT_TEXT_SECTION(PAGE_SIZE)
/* Now we skip back to PAGE_OFFSET for the data. */
. = (. - TEXT_OFFSET + PAGE_OFFSET);
#undef LOAD_OFFSET
#define LOAD_OFFSET PAGE_OFFSET
. = ALIGN(PAGE_SIZE);
__init_begin = .;
VMLINUX_SYMBOL(_sinitdata) = .;
INIT_DATA_SECTION(16) :data =0
PERCPU_SECTION(L2_CACHE_BYTES)
. = ALIGN(PAGE_SIZE);
VMLINUX_SYMBOL(_einitdata) = .;
__init_end = .;
_sdata = .; /* Start of data section */
RO_DATA_SECTION(PAGE_SIZE)
RW_DATA_SECTION(L2_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
_edata = .;
EXCEPTION_TABLE(L2_CACHE_BYTES)
NOTES
BSS_SECTION(8, PAGE_SIZE, 1)
_end = . ;
STABS_DEBUG
DWARF_DEBUG
DISCARDS
}