1003 lines
25 KiB
C
1003 lines
25 KiB
C
/*
|
|
* arch/s390/kernel/setup.c
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Author(s): Hartmut Penner (hp@de.ibm.com),
|
|
* Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*
|
|
* Derived from "arch/i386/kernel/setup.c"
|
|
* Copyright (C) 1995, Linus Torvalds
|
|
*/
|
|
|
|
/*
|
|
* This file handles the architecture-dependent parts of initialization
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/user.h>
|
|
#include <linux/a.out.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/console.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/device.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/reboot.h>
|
|
|
|
#include <asm/ipl.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/system.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/cpcmd.h>
|
|
#include <asm/lowcore.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/page.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/ebcdic.h>
|
|
#include <asm/compat.h>
|
|
|
|
long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY |
|
|
PSW_MASK_MCHECK | PSW_DEFAULT_KEY);
|
|
long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
|
|
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
|
|
PSW_MASK_PSTATE | PSW_DEFAULT_KEY);
|
|
|
|
/*
|
|
* User copy operations.
|
|
*/
|
|
struct uaccess_ops uaccess;
|
|
EXPORT_SYMBOL(uaccess);
|
|
|
|
/*
|
|
* Machine setup..
|
|
*/
|
|
unsigned int console_mode = 0;
|
|
unsigned int console_devno = -1;
|
|
unsigned int console_irq = -1;
|
|
unsigned long machine_flags = 0;
|
|
unsigned long elf_hwcap = 0;
|
|
char elf_platform[ELF_PLATFORM_SIZE];
|
|
|
|
struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS];
|
|
volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
|
|
static unsigned long __initdata memory_end;
|
|
|
|
/*
|
|
* This is set up by the setup-routine at boot-time
|
|
* for S390 need to find out, what we have to setup
|
|
* using address 0x10400 ...
|
|
*/
|
|
|
|
#include <asm/setup.h>
|
|
|
|
static struct resource code_resource = {
|
|
.name = "Kernel code",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct resource data_resource = {
|
|
.name = "Kernel data",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
/*
|
|
* cpu_init() initializes state that is per-CPU.
|
|
*/
|
|
void __devinit cpu_init (void)
|
|
{
|
|
int addr = hard_smp_processor_id();
|
|
|
|
/*
|
|
* Store processor id in lowcore (used e.g. in timer_interrupt)
|
|
*/
|
|
get_cpu_id(&S390_lowcore.cpu_data.cpu_id);
|
|
S390_lowcore.cpu_data.cpu_addr = addr;
|
|
|
|
/*
|
|
* Force FPU initialization:
|
|
*/
|
|
clear_thread_flag(TIF_USEDFPU);
|
|
clear_used_math();
|
|
|
|
atomic_inc(&init_mm.mm_count);
|
|
current->active_mm = &init_mm;
|
|
if (current->mm)
|
|
BUG();
|
|
enter_lazy_tlb(&init_mm, current);
|
|
}
|
|
|
|
/*
|
|
* VM halt and poweroff setup routines
|
|
*/
|
|
char vmhalt_cmd[128] = "";
|
|
char vmpoff_cmd[128] = "";
|
|
static char vmpanic_cmd[128] = "";
|
|
|
|
static void strncpy_skip_quote(char *dst, char *src, int n)
|
|
{
|
|
int sx, dx;
|
|
|
|
dx = 0;
|
|
for (sx = 0; src[sx] != 0; sx++) {
|
|
if (src[sx] == '"') continue;
|
|
dst[dx++] = src[sx];
|
|
if (dx >= n) break;
|
|
}
|
|
}
|
|
|
|
static int __init vmhalt_setup(char *str)
|
|
{
|
|
strncpy_skip_quote(vmhalt_cmd, str, 127);
|
|
vmhalt_cmd[127] = 0;
|
|
return 1;
|
|
}
|
|
|
|
__setup("vmhalt=", vmhalt_setup);
|
|
|
|
static int __init vmpoff_setup(char *str)
|
|
{
|
|
strncpy_skip_quote(vmpoff_cmd, str, 127);
|
|
vmpoff_cmd[127] = 0;
|
|
return 1;
|
|
}
|
|
|
|
__setup("vmpoff=", vmpoff_setup);
|
|
|
|
static int vmpanic_notify(struct notifier_block *self, unsigned long event,
|
|
void *data)
|
|
{
|
|
if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0)
|
|
cpcmd(vmpanic_cmd, NULL, 0, NULL);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
#define PANIC_PRI_VMPANIC 0
|
|
|
|
static struct notifier_block vmpanic_nb = {
|
|
.notifier_call = vmpanic_notify,
|
|
.priority = PANIC_PRI_VMPANIC
|
|
};
|
|
|
|
static int __init vmpanic_setup(char *str)
|
|
{
|
|
static int register_done __initdata = 0;
|
|
|
|
strncpy_skip_quote(vmpanic_cmd, str, 127);
|
|
vmpanic_cmd[127] = 0;
|
|
if (!register_done) {
|
|
register_done = 1;
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&vmpanic_nb);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("vmpanic=", vmpanic_setup);
|
|
|
|
/*
|
|
* condev= and conmode= setup parameter.
|
|
*/
|
|
|
|
static int __init condev_setup(char *str)
|
|
{
|
|
int vdev;
|
|
|
|
vdev = simple_strtoul(str, &str, 0);
|
|
if (vdev >= 0 && vdev < 65536) {
|
|
console_devno = vdev;
|
|
console_irq = -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("condev=", condev_setup);
|
|
|
|
static int __init conmode_setup(char *str)
|
|
{
|
|
#if defined(CONFIG_SCLP_CONSOLE)
|
|
if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
|
|
SET_CONSOLE_SCLP;
|
|
#endif
|
|
#if defined(CONFIG_TN3215_CONSOLE)
|
|
if (strncmp(str, "3215", 5) == 0)
|
|
SET_CONSOLE_3215;
|
|
#endif
|
|
#if defined(CONFIG_TN3270_CONSOLE)
|
|
if (strncmp(str, "3270", 5) == 0)
|
|
SET_CONSOLE_3270;
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
__setup("conmode=", conmode_setup);
|
|
|
|
static void __init conmode_default(void)
|
|
{
|
|
char query_buffer[1024];
|
|
char *ptr;
|
|
|
|
if (MACHINE_IS_VM) {
|
|
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);
|
|
ptr = strstr(query_buffer, "CONMODE");
|
|
/*
|
|
* Set the conmode to 3215 so that the device recognition
|
|
* will set the cu_type of the console to 3215. If the
|
|
* conmode is 3270 and we don't set it back then both
|
|
* 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);
|
|
if (ptr == NULL) {
|
|
#if defined(CONFIG_SCLP_CONSOLE)
|
|
SET_CONSOLE_SCLP;
|
|
#endif
|
|
return;
|
|
}
|
|
if (strncmp(ptr + 8, "3270", 4) == 0) {
|
|
#if defined(CONFIG_TN3270_CONSOLE)
|
|
SET_CONSOLE_3270;
|
|
#elif defined(CONFIG_TN3215_CONSOLE)
|
|
SET_CONSOLE_3215;
|
|
#elif defined(CONFIG_SCLP_CONSOLE)
|
|
SET_CONSOLE_SCLP;
|
|
#endif
|
|
} else if (strncmp(ptr + 8, "3215", 4) == 0) {
|
|
#if defined(CONFIG_TN3215_CONSOLE)
|
|
SET_CONSOLE_3215;
|
|
#elif defined(CONFIG_TN3270_CONSOLE)
|
|
SET_CONSOLE_3270;
|
|
#elif defined(CONFIG_SCLP_CONSOLE)
|
|
SET_CONSOLE_SCLP;
|
|
#endif
|
|
}
|
|
} else if (MACHINE_IS_P390) {
|
|
#if defined(CONFIG_TN3215_CONSOLE)
|
|
SET_CONSOLE_3215;
|
|
#elif defined(CONFIG_TN3270_CONSOLE)
|
|
SET_CONSOLE_3270;
|
|
#endif
|
|
} else {
|
|
#if defined(CONFIG_SCLP_CONSOLE)
|
|
SET_CONSOLE_SCLP;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
|
|
static void __init setup_zfcpdump(unsigned int console_devno)
|
|
{
|
|
static char str[64];
|
|
|
|
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
|
|
return;
|
|
if (console_devno != -1)
|
|
sprintf(str, "cio_ignore=all,!0.0.%04x,!0.0.%04x",
|
|
ipl_info.data.fcp.dev_id.devno, console_devno);
|
|
else
|
|
sprintf(str, "cio_ignore=all,!0.0.%04x",
|
|
ipl_info.data.fcp.dev_id.devno);
|
|
strcat(COMMAND_LINE, str);
|
|
console_loglevel = 2;
|
|
}
|
|
#else
|
|
static inline void setup_zfcpdump(unsigned int console_devno) {}
|
|
#endif /* CONFIG_ZFCPDUMP */
|
|
|
|
#ifdef CONFIG_SMP
|
|
void (*_machine_restart)(char *command) = machine_restart_smp;
|
|
void (*_machine_halt)(void) = machine_halt_smp;
|
|
void (*_machine_power_off)(void) = machine_power_off_smp;
|
|
#else
|
|
/*
|
|
* Reboot, halt and power_off routines for non SMP.
|
|
*/
|
|
static void do_machine_restart_nonsmp(char * __unused)
|
|
{
|
|
do_reipl();
|
|
}
|
|
|
|
static void do_machine_halt_nonsmp(void)
|
|
{
|
|
if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
|
|
__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);
|
|
signal_processor(smp_processor_id(), sigp_stop_and_store_status);
|
|
}
|
|
|
|
void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
|
|
void (*_machine_halt)(void) = do_machine_halt_nonsmp;
|
|
void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
|
|
#endif
|
|
|
|
/*
|
|
* Reboot, halt and power_off stubs. They just call _machine_restart,
|
|
* _machine_halt or _machine_power_off.
|
|
*/
|
|
|
|
void machine_restart(char *command)
|
|
{
|
|
if (!in_interrupt() || oops_in_progress)
|
|
/*
|
|
* Only unblank the console if we are called in enabled
|
|
* context or a bust_spinlocks cleared the way for us.
|
|
*/
|
|
console_unblank();
|
|
_machine_restart(command);
|
|
}
|
|
|
|
void machine_halt(void)
|
|
{
|
|
if (!in_interrupt() || oops_in_progress)
|
|
/*
|
|
* Only unblank the console if we are called in enabled
|
|
* context or a bust_spinlocks cleared the way for us.
|
|
*/
|
|
console_unblank();
|
|
_machine_halt();
|
|
}
|
|
|
|
void machine_power_off(void)
|
|
{
|
|
if (!in_interrupt() || oops_in_progress)
|
|
/*
|
|
* Only unblank the console if we are called in enabled
|
|
* context or a bust_spinlocks cleared the way for us.
|
|
*/
|
|
console_unblank();
|
|
_machine_power_off();
|
|
}
|
|
|
|
/*
|
|
* Dummy power off function.
|
|
*/
|
|
void (*pm_power_off)(void) = machine_power_off;
|
|
|
|
static int __init early_parse_mem(char *p)
|
|
{
|
|
memory_end = memparse(p, &p);
|
|
return 0;
|
|
}
|
|
early_param("mem", early_parse_mem);
|
|
|
|
/*
|
|
* "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
|
|
*/
|
|
static int __init early_parse_ipldelay(char *p)
|
|
{
|
|
unsigned long delay = 0;
|
|
|
|
delay = simple_strtoul(p, &p, 0);
|
|
|
|
switch (*p) {
|
|
case 's':
|
|
case 'S':
|
|
delay *= 1000000;
|
|
break;
|
|
case 'm':
|
|
case 'M':
|
|
delay *= 60 * 1000000;
|
|
}
|
|
|
|
/* now wait for the requested amount of time */
|
|
udelay(delay);
|
|
|
|
return 0;
|
|
}
|
|
early_param("ipldelay", early_parse_ipldelay);
|
|
|
|
#ifdef CONFIG_S390_SWITCH_AMODE
|
|
unsigned int switch_amode = 0;
|
|
EXPORT_SYMBOL_GPL(switch_amode);
|
|
|
|
static void set_amode_and_uaccess(unsigned long user_amode,
|
|
unsigned long user32_amode)
|
|
{
|
|
psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode |
|
|
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
|
|
PSW_MASK_PSTATE | PSW_DEFAULT_KEY;
|
|
#ifdef CONFIG_COMPAT
|
|
psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode |
|
|
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
|
|
PSW_MASK_PSTATE | PSW_DEFAULT_KEY;
|
|
psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode |
|
|
PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK |
|
|
PSW32_MASK_PSTATE;
|
|
#endif
|
|
psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
|
|
PSW_MASK_MCHECK | PSW_DEFAULT_KEY;
|
|
|
|
if (MACHINE_HAS_MVCOS) {
|
|
printk("mvcos available.\n");
|
|
memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess));
|
|
} else {
|
|
printk("mvcos not available.\n");
|
|
memcpy(&uaccess, &uaccess_pt, sizeof(uaccess));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Switch kernel/user addressing modes?
|
|
*/
|
|
static int __init early_parse_switch_amode(char *p)
|
|
{
|
|
switch_amode = 1;
|
|
return 0;
|
|
}
|
|
early_param("switch_amode", early_parse_switch_amode);
|
|
|
|
#else /* CONFIG_S390_SWITCH_AMODE */
|
|
static inline void set_amode_and_uaccess(unsigned long user_amode,
|
|
unsigned long user32_amode)
|
|
{
|
|
}
|
|
#endif /* CONFIG_S390_SWITCH_AMODE */
|
|
|
|
#ifdef CONFIG_S390_EXEC_PROTECT
|
|
unsigned int s390_noexec = 0;
|
|
EXPORT_SYMBOL_GPL(s390_noexec);
|
|
|
|
/*
|
|
* Enable execute protection?
|
|
*/
|
|
static int __init early_parse_noexec(char *p)
|
|
{
|
|
if (!strncmp(p, "off", 3))
|
|
return 0;
|
|
switch_amode = 1;
|
|
s390_noexec = 1;
|
|
return 0;
|
|
}
|
|
early_param("noexec", early_parse_noexec);
|
|
#endif /* CONFIG_S390_EXEC_PROTECT */
|
|
|
|
static void setup_addressing_mode(void)
|
|
{
|
|
if (s390_noexec) {
|
|
printk("S390 execute protection active, ");
|
|
set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY);
|
|
return;
|
|
}
|
|
if (switch_amode) {
|
|
printk("S390 address spaces switched, ");
|
|
set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY);
|
|
}
|
|
}
|
|
|
|
static void __init
|
|
setup_lowcore(void)
|
|
{
|
|
struct _lowcore *lc;
|
|
int lc_pages;
|
|
|
|
/*
|
|
* Setup lowcore for boot cpu
|
|
*/
|
|
lc_pages = sizeof(void *) == 8 ? 2 : 1;
|
|
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 | PSW_DEFAULT_KEY;
|
|
lc->restart_psw.addr =
|
|
PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
|
|
if (switch_amode)
|
|
lc->restart_psw.mask |= PSW_ASC_HOME;
|
|
lc->external_new_psw.mask = psw_kernel_bits;
|
|
lc->external_new_psw.addr =
|
|
PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
|
|
lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT;
|
|
lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
|
|
lc->program_new_psw.mask = psw_kernel_bits;
|
|
lc->program_new_psw.addr =
|
|
PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
|
|
lc->mcck_new_psw.mask =
|
|
psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
|
|
lc->mcck_new_psw.addr =
|
|
PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
|
|
lc->io_new_psw.mask = psw_kernel_bits;
|
|
lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
|
|
lc->ipl_device = S390_lowcore.ipl_device;
|
|
lc->jiffy_timer = -1LL;
|
|
lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
|
|
lc->async_stack = (unsigned long)
|
|
__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
|
|
lc->panic_stack = (unsigned long)
|
|
__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
|
|
lc->current_task = (unsigned long) init_thread_union.thread_info.task;
|
|
lc->thread_info = (unsigned long) &init_thread_union;
|
|
#ifndef CONFIG_64BIT
|
|
if (MACHINE_HAS_IEEE) {
|
|
lc->extended_save_area_addr = (__u32)
|
|
__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
|
|
/* enable extended save area */
|
|
__ctl_set_bit(14, 29);
|
|
}
|
|
#endif
|
|
set_prefix((u32)(unsigned long) lc);
|
|
}
|
|
|
|
static void __init
|
|
setup_resources(void)
|
|
{
|
|
struct resource *res, *sub_res;
|
|
int i;
|
|
|
|
code_resource.start = (unsigned long) &_text;
|
|
code_resource.end = (unsigned long) &_etext - 1;
|
|
data_resource.start = (unsigned long) &_etext;
|
|
data_resource.end = (unsigned long) &_edata - 1;
|
|
|
|
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
|
|
res = alloc_bootmem_low(sizeof(struct resource));
|
|
res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
|
|
switch (memory_chunk[i].type) {
|
|
case CHUNK_READ_WRITE:
|
|
res->name = "System RAM";
|
|
break;
|
|
case CHUNK_READ_ONLY:
|
|
res->name = "System ROM";
|
|
res->flags |= IORESOURCE_READONLY;
|
|
break;
|
|
default:
|
|
res->name = "reserved";
|
|
}
|
|
res->start = memory_chunk[i].addr;
|
|
res->end = memory_chunk[i].addr + memory_chunk[i].size - 1;
|
|
request_resource(&iomem_resource, res);
|
|
|
|
if (code_resource.start >= res->start &&
|
|
code_resource.start <= res->end &&
|
|
code_resource.end > res->end) {
|
|
sub_res = alloc_bootmem_low(sizeof(struct resource));
|
|
memcpy(sub_res, &code_resource,
|
|
sizeof(struct resource));
|
|
sub_res->end = res->end;
|
|
code_resource.start = res->end + 1;
|
|
request_resource(res, sub_res);
|
|
}
|
|
|
|
if (code_resource.start >= res->start &&
|
|
code_resource.start <= res->end &&
|
|
code_resource.end <= res->end)
|
|
request_resource(res, &code_resource);
|
|
|
|
if (data_resource.start >= res->start &&
|
|
data_resource.start <= res->end &&
|
|
data_resource.end > res->end) {
|
|
sub_res = alloc_bootmem_low(sizeof(struct resource));
|
|
memcpy(sub_res, &data_resource,
|
|
sizeof(struct resource));
|
|
sub_res->end = res->end;
|
|
data_resource.start = res->end + 1;
|
|
request_resource(res, sub_res);
|
|
}
|
|
|
|
if (data_resource.start >= res->start &&
|
|
data_resource.start <= res->end &&
|
|
data_resource.end <= res->end)
|
|
request_resource(res, &data_resource);
|
|
}
|
|
}
|
|
|
|
unsigned long real_memory_size;
|
|
EXPORT_SYMBOL_GPL(real_memory_size);
|
|
|
|
static void __init setup_memory_end(void)
|
|
{
|
|
unsigned long memory_size;
|
|
unsigned long max_mem, max_phys;
|
|
int i;
|
|
|
|
#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
|
|
if (ipl_info.type == IPL_TYPE_FCP_DUMP)
|
|
memory_end = ZFCPDUMP_HSA_SIZE;
|
|
#endif
|
|
memory_size = 0;
|
|
max_phys = VMALLOC_END_INIT - 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_memory_size = max(real_memory_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;
|
|
}
|
|
|
|
static void __init
|
|
setup_memory(void)
|
|
{
|
|
unsigned long bootmap_size;
|
|
unsigned long start_pfn, end_pfn;
|
|
int i;
|
|
|
|
/*
|
|
* partially used pages are not usable - thus
|
|
* we are rounding upwards:
|
|
*/
|
|
start_pfn = PFN_UP(__pa(&_end));
|
|
end_pfn = max_pfn = PFN_DOWN(memory_end);
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
/*
|
|
* Move the initrd in case the bitmap of the bootmem allocater
|
|
* would overwrite it.
|
|
*/
|
|
|
|
if (INITRD_START && INITRD_SIZE) {
|
|
unsigned long bmap_size;
|
|
unsigned long start;
|
|
|
|
bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1);
|
|
bmap_size = PFN_PHYS(bmap_size);
|
|
|
|
if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) {
|
|
start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE;
|
|
|
|
if (start + INITRD_SIZE > memory_end) {
|
|
printk("initrd extends beyond end of memory "
|
|
"(0x%08lx > 0x%08lx)\n"
|
|
"disabling initrd\n",
|
|
start + INITRD_SIZE, memory_end);
|
|
INITRD_START = INITRD_SIZE = 0;
|
|
} else {
|
|
printk("Moving initrd (0x%08lx -> 0x%08lx, "
|
|
"size: %ld)\n",
|
|
INITRD_START, start, INITRD_SIZE);
|
|
memmove((void *) start, (void *) INITRD_START,
|
|
INITRD_SIZE);
|
|
INITRD_START = start;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialize the boot-time allocator
|
|
*/
|
|
bootmap_size = init_bootmem(start_pfn, end_pfn);
|
|
|
|
/*
|
|
* Register RAM areas with the bootmem allocator.
|
|
*/
|
|
|
|
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
|
|
unsigned long start_chunk, end_chunk, pfn;
|
|
|
|
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);
|
|
}
|
|
|
|
psw_set_key(PAGE_DEFAULT_KEY);
|
|
|
|
free_bootmem_with_active_regions(0, max_pfn);
|
|
|
|
/*
|
|
* Reserve memory used for lowcore/command line/kernel image.
|
|
*/
|
|
reserve_bootmem(0, (unsigned long)_ehead);
|
|
reserve_bootmem((unsigned long)_stext,
|
|
PFN_PHYS(start_pfn) - (unsigned long)_stext);
|
|
/*
|
|
* Reserve the bootmem bitmap itself as well. We do this in two
|
|
* steps (first step was init_bootmem()) because this catches
|
|
* the (very unlikely) case of us accidentally initializing the
|
|
* bootmem allocator with an invalid RAM area.
|
|
*/
|
|
reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (INITRD_START && INITRD_SIZE) {
|
|
if (INITRD_START + INITRD_SIZE <= memory_end) {
|
|
reserve_bootmem(INITRD_START, INITRD_SIZE);
|
|
initrd_start = INITRD_START;
|
|
initrd_end = initrd_start + INITRD_SIZE;
|
|
} else {
|
|
printk("initrd extends beyond end of memory "
|
|
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
|
|
initrd_start + INITRD_SIZE, memory_end);
|
|
initrd_start = initrd_end = 0;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __init unsigned int stfl(void)
|
|
{
|
|
asm volatile(
|
|
" .insn s,0xb2b10000,0(0)\n" /* stfl */
|
|
"0:\n"
|
|
EX_TABLE(0b,0b));
|
|
return S390_lowcore.stfl_fac_list;
|
|
}
|
|
|
|
static __init int stfle(unsigned long long *list, int doublewords)
|
|
{
|
|
typedef struct { unsigned long long _[doublewords]; } addrtype;
|
|
register unsigned long __nr asm("0") = doublewords - 1;
|
|
|
|
asm volatile(".insn s,0xb2b00000,%0" /* stfle */
|
|
: "=m" (*(addrtype *) list), "+d" (__nr) : : "cc");
|
|
return __nr + 1;
|
|
}
|
|
|
|
/*
|
|
* Setup hardware capabilities.
|
|
*/
|
|
static void __init setup_hwcaps(void)
|
|
{
|
|
static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
|
|
struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data;
|
|
unsigned long long facility_list_extended;
|
|
unsigned int facility_list;
|
|
int i;
|
|
|
|
facility_list = stfl();
|
|
/*
|
|
* The store facility list bits numbers as found in the principles
|
|
* of operation are numbered with bit 1UL<<31 as number 0 to
|
|
* bit 1UL<<0 as number 31.
|
|
* Bit 0: instructions named N3, "backported" to esa-mode
|
|
* Bit 2: z/Architecture mode is active
|
|
* Bit 7: the store-facility-list-extended facility is installed
|
|
* Bit 17: the message-security assist is installed
|
|
* Bit 19: the long-displacement facility is installed
|
|
* Bit 21: the extended-immediate facility is installed
|
|
* These get translated to:
|
|
* HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1,
|
|
* HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3,
|
|
* HWCAP_S390_LDISP bit 4, and HWCAP_S390_EIMM bit 5.
|
|
*/
|
|
for (i = 0; i < 6; i++)
|
|
if (facility_list & (1UL << (31 - stfl_bits[i])))
|
|
elf_hwcap |= 1UL << i;
|
|
|
|
/*
|
|
* Check for additional facilities with store-facility-list-extended.
|
|
* stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0
|
|
* and 1ULL<<0 as bit 63. Bits 0-31 contain the same information
|
|
* as stored by stfl, bits 32-xxx contain additional facilities.
|
|
* How many facility words are stored depends on the number of
|
|
* doublewords passed to the instruction. The additional facilites
|
|
* are:
|
|
* Bit 43: decimal floating point facility is installed
|
|
* translated to:
|
|
* HWCAP_S390_DFP bit 6.
|
|
*/
|
|
if ((elf_hwcap & (1UL << 2)) &&
|
|
stfle(&facility_list_extended, 1) > 0) {
|
|
if (facility_list_extended & (1ULL << (64 - 43)))
|
|
elf_hwcap |= 1UL << 6;
|
|
}
|
|
|
|
switch (cpuinfo->cpu_id.machine) {
|
|
case 0x9672:
|
|
#if !defined(CONFIG_64BIT)
|
|
default: /* Use "g5" as default for 31 bit kernels. */
|
|
#endif
|
|
strcpy(elf_platform, "g5");
|
|
break;
|
|
case 0x2064:
|
|
case 0x2066:
|
|
#if defined(CONFIG_64BIT)
|
|
default: /* Use "z900" as default for 64 bit kernels. */
|
|
#endif
|
|
strcpy(elf_platform, "z900");
|
|
break;
|
|
case 0x2084:
|
|
case 0x2086:
|
|
strcpy(elf_platform, "z990");
|
|
break;
|
|
case 0x2094:
|
|
strcpy(elf_platform, "z9-109");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Setup function called from init/main.c just after the banner
|
|
* was printed.
|
|
*/
|
|
|
|
void __init
|
|
setup_arch(char **cmdline_p)
|
|
{
|
|
/*
|
|
* print what head.S has found out about the machine
|
|
*/
|
|
#ifndef CONFIG_64BIT
|
|
printk((MACHINE_IS_VM) ?
|
|
"We are running under VM (31 bit mode)\n" :
|
|
"We are running native (31 bit mode)\n");
|
|
printk((MACHINE_HAS_IEEE) ?
|
|
"This machine has an IEEE fpu\n" :
|
|
"This machine has no IEEE fpu\n");
|
|
#else /* CONFIG_64BIT */
|
|
printk((MACHINE_IS_VM) ?
|
|
"We are running under VM (64 bit mode)\n" :
|
|
"We are running native (64 bit mode)\n");
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
/* Save unparsed command line copy for /proc/cmdline */
|
|
strlcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
|
|
|
|
*cmdline_p = COMMAND_LINE;
|
|
*(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
|
|
|
|
ROOT_DEV = Root_RAM0;
|
|
|
|
init_mm.start_code = PAGE_OFFSET;
|
|
init_mm.end_code = (unsigned long) &_etext;
|
|
init_mm.end_data = (unsigned long) &_edata;
|
|
init_mm.brk = (unsigned long) &_end;
|
|
|
|
if (MACHINE_HAS_MVCOS)
|
|
memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess));
|
|
else
|
|
memcpy(&uaccess, &uaccess_std, sizeof(uaccess));
|
|
|
|
parse_early_param();
|
|
|
|
setup_ipl_info();
|
|
setup_memory_end();
|
|
setup_addressing_mode();
|
|
setup_memory();
|
|
setup_resources();
|
|
setup_lowcore();
|
|
|
|
cpu_init();
|
|
__cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
|
|
smp_setup_cpu_possible_map();
|
|
|
|
/*
|
|
* Setup capabilities (ELF_HWCAP & ELF_PLATFORM).
|
|
*/
|
|
setup_hwcaps();
|
|
|
|
/*
|
|
* Create kernel page tables and switch to virtual addressing.
|
|
*/
|
|
paging_init();
|
|
|
|
/* Setup default console */
|
|
conmode_default();
|
|
|
|
/* Setup zfcpdump support */
|
|
setup_zfcpdump(console_devno);
|
|
}
|
|
|
|
void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
|
|
{
|
|
printk("cpu %d "
|
|
#ifdef CONFIG_SMP
|
|
"phys_idx=%d "
|
|
#endif
|
|
"vers=%02X ident=%06X machine=%04X unused=%04X\n",
|
|
cpuinfo->cpu_nr,
|
|
#ifdef CONFIG_SMP
|
|
cpuinfo->cpu_addr,
|
|
#endif
|
|
cpuinfo->cpu_id.version,
|
|
cpuinfo->cpu_id.ident,
|
|
cpuinfo->cpu_id.machine,
|
|
cpuinfo->cpu_id.unused);
|
|
}
|
|
|
|
/*
|
|
* show_cpuinfo - Get information on one CPU for use by procfs.
|
|
*/
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
static const char *hwcap_str[7] = {
|
|
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp"
|
|
};
|
|
struct cpuinfo_S390 *cpuinfo;
|
|
unsigned long n = (unsigned long) v - 1;
|
|
int i;
|
|
|
|
s390_adjust_jiffies();
|
|
preempt_disable();
|
|
if (!n) {
|
|
seq_printf(m, "vendor_id : IBM/S390\n"
|
|
"# processors : %i\n"
|
|
"bogomips per cpu: %lu.%02lu\n",
|
|
num_online_cpus(), loops_per_jiffy/(500000/HZ),
|
|
(loops_per_jiffy/(5000/HZ))%100);
|
|
seq_puts(m, "features\t: ");
|
|
for (i = 0; i < 7; i++)
|
|
if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
|
|
seq_printf(m, "%s ", hwcap_str[i]);
|
|
seq_puts(m, "\n");
|
|
}
|
|
|
|
if (cpu_online(n)) {
|
|
#ifdef CONFIG_SMP
|
|
if (smp_processor_id() == n)
|
|
cpuinfo = &S390_lowcore.cpu_data;
|
|
else
|
|
cpuinfo = &lowcore_ptr[n]->cpu_data;
|
|
#else
|
|
cpuinfo = &S390_lowcore.cpu_data;
|
|
#endif
|
|
seq_printf(m, "processor %li: "
|
|
"version = %02X, "
|
|
"identification = %06X, "
|
|
"machine = %04X\n",
|
|
n, cpuinfo->cpu_id.version,
|
|
cpuinfo->cpu_id.ident,
|
|
cpuinfo->cpu_id.machine);
|
|
}
|
|
preempt_enable();
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
|
|
}
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_start(m, pos);
|
|
}
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|