summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/setup.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/setup.c')
-rw-r--r--arch/s390/kernel/setup.c121
1 files changed, 81 insertions, 40 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 49f2b68e32b1..b928fecdc743 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -62,14 +62,11 @@ EXPORT_SYMBOL_GPL(uaccess);
unsigned int console_mode = 0;
unsigned int console_devno = -1;
unsigned int console_irq = -1;
-unsigned long memory_size = 0;
unsigned long machine_flags = 0;
-struct {
- unsigned long addr, size, type;
-} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
-#define CHUNK_READ_WRITE 0
-#define CHUNK_READ_ONLY 1
+
+struct mem_chunk memory_chunk[MEMORY_CHUNKS];
volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
+unsigned long __initdata zholes_size[MAX_NR_ZONES];
static unsigned long __initdata memory_end;
/*
@@ -228,11 +225,11 @@ static void __init conmode_default(void)
char *ptr;
if (MACHINE_IS_VM) {
- __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
+ cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
ptr = strstr(query_buffer, "SUBCHANNEL =");
console_irq = simple_strtoul(ptr + 13, NULL, 16);
- __cpcmd("QUERY TERM", query_buffer, 1024, NULL);
+ cpcmd("QUERY TERM", query_buffer, 1024, NULL);
ptr = strstr(query_buffer, "CONMODE");
/*
* Set the conmode to 3215 so that the device recognition
@@ -241,7 +238,7 @@ static void __init conmode_default(void)
* 3215 and the 3270 driver will try to access the console
* device (3215 as console and 3270 as normal tty).
*/
- __cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
+ cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
if (ptr == NULL) {
#if defined(CONFIG_SCLP_CONSOLE)
SET_CONSOLE_SCLP;
@@ -298,14 +295,14 @@ static void do_machine_restart_nonsmp(char * __unused)
static void do_machine_halt_nonsmp(void)
{
if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
- cpcmd(vmhalt_cmd, NULL, 0, NULL);
+ __cpcmd(vmhalt_cmd, NULL, 0, NULL);
signal_processor(smp_processor_id(), sigp_stop_and_store_status);
}
static void do_machine_power_off_nonsmp(void)
{
if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
- cpcmd(vmpoff_cmd, NULL, 0, NULL);
+ __cpcmd(vmpoff_cmd, NULL, 0, NULL);
signal_processor(smp_processor_id(), sigp_stop_and_store_status);
}
@@ -357,6 +354,21 @@ void machine_power_off(void)
*/
void (*pm_power_off)(void) = machine_power_off;
+static void __init
+add_memory_hole(unsigned long start, unsigned long end)
+{
+ unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
+
+ if (end <= dma_pfn)
+ zholes_size[ZONE_DMA] += end - start + 1;
+ else if (start > dma_pfn)
+ zholes_size[ZONE_NORMAL] += end - start + 1;
+ else {
+ zholes_size[ZONE_DMA] += dma_pfn - start + 1;
+ zholes_size[ZONE_NORMAL] += end - dma_pfn;
+ }
+}
+
static int __init early_parse_mem(char *p)
{
memory_end = memparse(p, &p);
@@ -434,7 +446,7 @@ setup_lowcore(void)
lc->extended_save_area_addr = (__u32)
__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
/* enable extended save area */
- ctl_set_bit(14, 29);
+ __ctl_set_bit(14, 29);
}
#endif
set_prefix((u32)(unsigned long) lc);
@@ -473,11 +485,43 @@ setup_resources(void)
}
}
+static void __init setup_memory_end(void)
+{
+ unsigned long real_size, memory_size;
+ unsigned long max_mem, max_phys;
+ int i;
+
+ memory_size = real_size = 0;
+ max_phys = VMALLOC_END - VMALLOC_MIN_SIZE;
+ memory_end &= PAGE_MASK;
+
+ max_mem = memory_end ? min(max_phys, memory_end) : max_phys;
+
+ for (i = 0; i < MEMORY_CHUNKS; i++) {
+ struct mem_chunk *chunk = &memory_chunk[i];
+
+ real_size = max(real_size, chunk->addr + chunk->size);
+ if (chunk->addr >= max_mem) {
+ memset(chunk, 0, sizeof(*chunk));
+ continue;
+ }
+ if (chunk->addr + chunk->size > max_mem)
+ chunk->size = max_mem - chunk->addr;
+ memory_size = max(memory_size, chunk->addr + chunk->size);
+ }
+ if (!memory_end)
+ memory_end = memory_size;
+ if (real_size > memory_end)
+ printk("More memory detected than supported. Unused: %luk\n",
+ (real_size - memory_end) >> 10);
+}
+
static void __init
setup_memory(void)
{
unsigned long bootmap_size;
unsigned long start_pfn, end_pfn, init_pfn;
+ unsigned long last_rw_end;
int i;
/*
@@ -533,27 +577,39 @@ setup_memory(void)
/*
* Register RAM areas with the bootmem allocator.
*/
+ last_rw_end = start_pfn;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
- unsigned long start_chunk, end_chunk, pfn;
+ unsigned long start_chunk, end_chunk;
if (memory_chunk[i].type != CHUNK_READ_WRITE)
continue;
- start_chunk = PFN_DOWN(memory_chunk[i].addr);
- end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1;
- end_chunk = min(end_chunk, end_pfn);
- if (start_chunk >= end_chunk)
- continue;
- add_active_range(0, start_chunk, end_chunk);
- pfn = max(start_chunk, start_pfn);
- for (; pfn <= end_chunk; pfn++)
- page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY);
+ start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
+ start_chunk >>= PAGE_SHIFT;
+ end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
+ end_chunk >>= PAGE_SHIFT;
+ if (start_chunk < start_pfn)
+ start_chunk = start_pfn;
+ 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)
+ add_memory_hole(last_rw_end, start_chunk - 1);
+ last_rw_end = end_chunk;
+ }
}
psw_set_key(PAGE_DEFAULT_KEY);
- free_bootmem_with_active_regions(0, max_pfn);
- reserve_bootmem(0, PFN_PHYS(start_pfn));
+ if (last_rw_end < end_pfn - 1)
+ add_memory_hole(last_rw_end, end_pfn - 1);
/*
* Reserve the bootmem bitmap itself as well. We do this in two
@@ -616,8 +672,6 @@ setup_arch(char **cmdline_p)
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
- memory_end = memory_size;
-
if (MACHINE_HAS_MVCOS)
memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess));
else
@@ -625,20 +679,7 @@ setup_arch(char **cmdline_p)
parse_early_param();
-#ifndef CONFIG_64BIT
- memory_end &= ~0x400000UL;
-
- /*
- * We need some free virtual space to be able to do vmalloc.
- * On a machine with 2GB memory we make sure that we have at
- * least 128 MB free space for vmalloc.
- */
- if (memory_end > 1920*1024*1024)
- memory_end = 1920*1024*1024;
-#else /* CONFIG_64BIT */
- memory_end &= ~0x200000UL;
-#endif /* CONFIG_64BIT */
-
+ setup_memory_end();
setup_memory();
setup_resources();
setup_lowcore();
View Lorry Controller Status