linux/arch/tile/kernel/vmlinux.lds.S
Chris Metcalf acbde1db29 tile: parameterize VA and PA space more cleanly
The existing code relied on the hardware definition (<arch/chip.h>)
to specify how much VA and PA space was available.  It's convenient
to allow customizing this for some configurations, so provide symbols
MAX_PA_WIDTH and MAX_VA_WIDTH in <asm/page.h> that can be modified
if desired.

Additionally, move away from the MEM_XX_INTRPT nomenclature to
define the start of various regions within the VA space.  In fact
the cleaner symbol is, for example, MEM_SV_START, to indicate the
start of the area used for supervisor code; the actual address of the
interrupt vectors is not as important, and can be changed if desired.
As part of this change, convert from "intrpt1" nomenclature (which
built in the old privilege-level 1 model) to a simple "intrpt".

Also strip out some tilepro-specific code supporting modifying the
PL the kernel could run at, since we don't actually support using
different PLs in tilepro, only tilegx.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:47:34 -04:00

105 lines
2.1 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)
/* initially writeable, then read-only */
. = ALIGN(PAGE_SIZE);
__w1data_begin = .;
.w1data : AT(ADDR(.w1data) - LOAD_OFFSET) {
VMLINUX_SYMBOL(__w1data_begin) = .;
*(.w1data)
VMLINUX_SYMBOL(__w1data_end) = .;
}
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
}