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[PATCH] s390: default storage key

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Provide an easy way to define a non-zero storage key at compile time.  This is
useful for debugging purposes.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Peter Oberparleiter
2005-05-01 08:58:58 -07:00
committed by Linus Torvalds
parent c9e3735359
commit 0b642ede47
8 changed files with 41 additions and 16 deletions
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20
arch/s390/kernel/setup.c
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@@ -44,6 +44,8 @@
#include <asm/cpcmd.h>
#include <asm/lowcore.h>
#include <asm/irq.h>
#include <asm/page.h>
#include <asm/ptrace.h>
/*
* Machine setup..
@@ -53,7 +55,6 @@ unsigned int console_devno = -1;
unsigned int console_irq = -1;
unsigned long memory_size = 0;
unsigned long machine_flags = 0;
unsigned int default_storage_key = 0;
struct {
unsigned long addr, size, type;
} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
@@ -402,7 +403,7 @@ setup_lowcore(void)
lc = (struct _lowcore *)
__alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
memset(lc, 0, lc_pages * PAGE_SIZE);
lc->restart_psw.mask = PSW_BASE_BITS;
lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
lc->restart_psw.addr =
PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
lc->external_new_psw.mask = PSW_KERNEL_BITS;
@@ -470,7 +471,7 @@ static void __init
setup_memory(void)
{
unsigned long bootmap_size;
unsigned long start_pfn, end_pfn;
unsigned long start_pfn, end_pfn, init_pfn;
unsigned long last_rw_end;
int i;
@@ -481,6 +482,10 @@ setup_memory(void)
start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
/* Initialize storage key for kernel pages */
for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
/*
* Initialize the boot-time allocator (with low memory only):
*/
@@ -491,7 +496,7 @@ setup_memory(void)
*/
last_rw_end = start_pfn;
for (i = 0; i < 16 && memory_chunk[i].size > 0; i++) {
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
unsigned long start_chunk, end_chunk;
if (memory_chunk[i].type != CHUNK_READ_WRITE)
@@ -505,6 +510,11 @@ setup_memory(void)
if (end_chunk > end_pfn)
end_chunk = end_pfn;
if (start_chunk < end_chunk) {
/* Initialize storage key for RAM pages */
for (init_pfn = start_chunk ; init_pfn < end_chunk;
init_pfn++)
page_set_storage_key(init_pfn << PAGE_SHIFT,
PAGE_DEFAULT_KEY);
free_bootmem(start_chunk << PAGE_SHIFT,
(end_chunk - start_chunk) << PAGE_SHIFT);
if (last_rw_end < start_chunk)
@@ -513,6 +523,8 @@ setup_memory(void)
}
}
psw_set_key(PAGE_DEFAULT_KEY);
if (last_rw_end < end_pfn - 1)
add_memory_hole(last_rw_end, end_pfn - 1);