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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2005-05-01 08:58:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-01 08:58:58 -0700 |
| commit | 0b642ede47969d4180b0922d982777fe64379228 (patch) | |
| tree | b54173402cfcd590976f639ef6c2f0490cc23c74 /arch/s390/kernel/setup.c | |
| parent | c9e3735359ac2d74ee61c6f1e5724f4a6db570bf (diff) | |
| download | linux-0b642ede47969d4180b0922d982777fe64379228.tar.gz linux-0b642ede47969d4180b0922d982777fe64379228.tar.bz2 linux-0b642ede47969d4180b0922d982777fe64379228.zip | |
[PATCH] s390: default storage key
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>
Diffstat (limited to 'arch/s390/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index f0679be4f96f..df83215beac3 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -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); |