#include <asm/rtas.h>
#include <asm/semaphore.h>
#include <asm/machdep.h>
-#include <asm/paca.h>
#include <asm/page.h>
#include <asm/param.h>
#include <asm/system.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
-struct flash_block_list_header rtas_firmware_flash_list = {0, 0};
-
-/*
- * prom_init() is called very early on, before the kernel text
- * and data have been mapped to KERNELBASE. At this point the code
- * is running at whatever address it has been loaded at, so
- * references to extern and static variables must be relocated
- * explicitly. The procedure reloc_offset() returns the address
- * we're currently running at minus the address we were linked at.
- * (Note that strings count as static variables.)
- *
- * Because OF may have mapped I/O devices into the area starting at
- * KERNELBASE, particularly on CHRP machines, we can't safely call
- * OF once the kernel has been mapped to KERNELBASE. Therefore all
- * OF calls should be done within prom_init(), and prom_init()
- * and all routines called within it must be careful to relocate
- * references as necessary.
- *
- * Note that the bss is cleared *after* prom_init runs, so we have
- * to make sure that any static or extern variables it accesses
- * are put in the data segment.
- */
+struct flash_block_list_header rtas_firmware_flash_list = {0, NULL};
struct rtas_t rtas = {
.lock = SPIN_LOCK_UNLOCKED
};
-char rtas_err_buf[RTAS_ERROR_LOG_MAX];
+EXPORT_SYMBOL(rtas);
-extern unsigned long reloc_offset(void);
+char rtas_err_buf[RTAS_ERROR_LOG_MAX];
spinlock_t rtas_data_buf_lock = SPIN_LOCK_UNLOCKED;
char rtas_data_buf[RTAS_DATA_BUF_SIZE]__page_aligned;
+unsigned long rtas_rmo_buf;
void
-call_rtas_display_status(char c)
+call_rtas_display_status(unsigned char c)
{
- struct rtas_args *args = &(get_paca()->xRtas);
+ struct rtas_args *args = &rtas.args;
unsigned long s;
+ if (!rtas.base)
+ return;
spin_lock_irqsave(&rtas.lock, s);
args->token = 10;
args->rets = (rtas_arg_t *)&(args->args[1]);
args->args[0] = (int)c;
- enter_rtas((void *)__pa((unsigned long)args));
+ enter_rtas(__pa(args));
spin_unlock_irqrestore(&rtas.lock, s);
}
+void
+call_rtas_display_status_delay(unsigned char c)
+{
+ static int pending_newline = 0; /* did last write end with unprinted newline? */
+ static int width = 16;
+
+ if (c == '\n') {
+ while (width-- > 0)
+ call_rtas_display_status(' ');
+ width = 16;
+ udelay(500000);
+ pending_newline = 1;
+ } else {
+ if (pending_newline) {
+ call_rtas_display_status('\r');
+ call_rtas_display_status('\n');
+ }
+ pending_newline = 0;
+ if (width--) {
+ call_rtas_display_status(c);
+ udelay(10000);
+ }
+ }
+}
+
int
rtas_token(const char *service)
{
return tokp ? *tokp : RTAS_UNKNOWN_SERVICE;
}
-
+/** Return a copy of the detailed error text associated with the
+ * most recent failed call to rtas. Because the error text
+ * might go stale if there are any other intervening rtas calls,
+ * this routine must be called atomically with whatever produced
+ * the error (i.e. with rtas.lock still held from the previous call).
+ */
static int
-__log_rtas_error(struct rtas_args *rtas_args)
+__fetch_rtas_last_error(void)
{
- struct rtas_args err_args, temp_args;
+ struct rtas_args err_args, save_args;
+ u32 bufsz;
+
+ bufsz = rtas_token ("rtas-error-log-max");
+ if ((bufsz == RTAS_UNKNOWN_SERVICE) ||
+ (bufsz > RTAS_ERROR_LOG_MAX)) {
+ printk (KERN_WARNING "RTAS: bad log buffer size %d\n", bufsz);
+ bufsz = RTAS_ERROR_LOG_MAX;
+ }
err_args.token = rtas_token("rtas-last-error");
err_args.nargs = 2;
err_args.nret = 1;
- err_args.rets = (rtas_arg_t *)&(err_args.args[2]);
err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf);
- err_args.args[1] = RTAS_ERROR_LOG_MAX;
+ err_args.args[1] = bufsz;
err_args.args[2] = 0;
- temp_args = *rtas_args;
- get_paca()->xRtas = err_args;
+ save_args = rtas.args;
+ rtas.args = err_args;
- PPCDBG(PPCDBG_RTAS, "\tentering rtas with 0x%lx\n",
- (void *)__pa((unsigned long)&err_args));
- enter_rtas((void *)__pa((unsigned long)&get_paca()->xRtas));
- PPCDBG(PPCDBG_RTAS, "\treturned from rtas ...\n");
+ enter_rtas(__pa(&rtas.args));
- err_args = get_paca()->xRtas;
- get_paca()->xRtas = temp_args;
+ err_args = rtas.args;
+ rtas.args = save_args;
- return err_args.rets[0];
+ return err_args.args[2];
}
-void
-log_rtas_error(struct rtas_args *rtas_args)
-{
- unsigned long s;
- int rc;
-
- spin_lock_irqsave(&rtas.lock, s);
- rc = __log_rtas_error(rtas_args);
- spin_unlock_irqrestore(&rtas.lock, s);
- if (rc == 0)
- log_error(rtas_err_buf, ERR_TYPE_RTAS_LOG, 0);
-}
-
-long
-rtas_call(int token, int nargs, int nret,
- unsigned long *outputs, ...)
+int rtas_call(int token, int nargs, int nret, int *outputs, ...)
{
va_list list;
int i, logit = 0;
unsigned long s;
- struct rtas_args *rtas_args = &(get_paca()->xRtas);
- long ret;
+ struct rtas_args *rtas_args;
+ char * buff_copy = NULL;
+ int ret;
PPCDBG(PPCDBG_RTAS, "Entering rtas_call\n");
PPCDBG(PPCDBG_RTAS, "\ttoken = 0x%x\n", token);
/* Gotta do something different here, use global lock for now... */
spin_lock_irqsave(&rtas.lock, s);
+ rtas_args = &rtas.args;
rtas_args->token = token;
rtas_args->nargs = nargs;
rtas_args->rets = (rtas_arg_t *)&(rtas_args->args[nargs]);
va_start(list, outputs);
for (i = 0; i < nargs; ++i) {
- rtas_args->args[i] = (rtas_arg_t)LONG_LSW(va_arg(list, ulong));
- PPCDBG(PPCDBG_RTAS, "\tnarg[%d] = 0x%lx\n", i, rtas_args->args[i]);
+ rtas_args->args[i] = va_arg(list, rtas_arg_t);
+ PPCDBG(PPCDBG_RTAS, "\tnarg[%d] = 0x%x\n", i, rtas_args->args[i]);
}
va_end(list);
rtas_args->rets[i] = 0;
PPCDBG(PPCDBG_RTAS, "\tentering rtas with 0x%lx\n",
- (void *)__pa((unsigned long)rtas_args));
- enter_rtas((void *)__pa((unsigned long)rtas_args));
+ __pa(rtas_args));
+ enter_rtas(__pa(rtas_args));
PPCDBG(PPCDBG_RTAS, "\treturned from rtas ...\n");
+ /* A -1 return code indicates that the last command couldn't
+ be completed due to a hardware error. */
if (rtas_args->rets[0] == -1)
- logit = (__log_rtas_error(rtas_args) == 0);
+ logit = (__fetch_rtas_last_error() == 0);
ifppcdebug(PPCDBG_RTAS) {
for(i=0; i < nret ;i++)
if (nret > 1 && outputs != NULL)
for (i = 0; i < nret-1; ++i)
outputs[i] = rtas_args->rets[i+1];
- ret = (ulong)((nret > 0) ? rtas_args->rets[0] : 0);
+ ret = (nret > 0)? rtas_args->rets[0]: 0;
+
+ /* Log the error in the unlikely case that there was one. */
+ if (unlikely(logit)) {
+ buff_copy = rtas_err_buf;
+ if (mem_init_done) {
+ buff_copy = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC);
+ if (buff_copy)
+ memcpy(buff_copy, rtas_err_buf,
+ RTAS_ERROR_LOG_MAX);
+ }
+ }
/* Gotta do something different here, use global lock for now... */
spin_unlock_irqrestore(&rtas.lock, s);
- if (logit)
- log_error(rtas_err_buf, ERR_TYPE_RTAS_LOG, 0);
-
+ if (buff_copy) {
+ log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0);
+ if (mem_init_done)
+ kfree(buff_copy);
+ }
return ret;
}
/* Use microseconds for reasonable accuracy */
for (ms=1; order > 0; order--)
- ms *= 10;
+ ms *= 10;
return ms;
}
rtas_get_power_level(int powerdomain, int *level)
{
int token = rtas_token("get-power-level");
- long powerlevel;
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
return RTAS_UNKNOWN_OP;
- while(1) {
- rc = (int) rtas_call(token, 1, 2, &powerlevel, powerdomain);
- if (rc == RTAS_BUSY)
- udelay(1);
- else
- break;
- }
- *level = (int) powerlevel;
+ while ((rc = rtas_call(token, 1, 2, level, powerdomain)) == RTAS_BUSY)
+ udelay(1);
return rc;
}
{
int token = rtas_token("set-power-level");
unsigned int wait_time;
- long returned_level;
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
return RTAS_UNKNOWN_OP;
while (1) {
- rc = (int) rtas_call(token, 2, 2, &returned_level, powerdomain,
- level);
+ rc = rtas_call(token, 2, 2, setlevel, powerdomain, level);
if (rc == RTAS_BUSY)
udelay(1);
else if (rtas_is_extended_busy(rc)) {
wait_time = rtas_extended_busy_delay_time(rc);
udelay(wait_time * 1000);
- }
- else
+ } else
break;
}
- *setlevel = (int) returned_level;
return rc;
}
{
int token = rtas_token("get-sensor-state");
unsigned int wait_time;
- long returned_state;
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
return RTAS_UNKNOWN_OP;
while (1) {
- rc = (int) rtas_call(token, 2, 2, &returned_state, sensor,
- index);
+ rc = rtas_call(token, 2, 2, state, sensor, index);
if (rc == RTAS_BUSY)
udelay(1);
else if (rtas_is_extended_busy(rc)) {
wait_time = rtas_extended_busy_delay_time(rc);
udelay(wait_time * 1000);
- }
- else
+ } else
break;
}
- *state = (int) returned_state;
return rc;
}
return RTAS_UNKNOWN_OP;
while (1) {
- rc = (int) rtas_call(token, 3, 1, NULL, indicator, index,
- new_value);
+ rc = rtas_call(token, 3, 1, NULL, indicator, index, new_value);
if (rc == RTAS_BUSY)
udelay(1);
else if (rtas_is_extended_busy(rc)) {
rtas_firmware_flash_list.num_blocks = 0;
flist = (struct flash_block_list *)&rtas_firmware_flash_list;
rtas_block_list = virt_to_abs(flist);
- if (rtas_block_list >= (4UL << 20)) {
+ if (rtas_block_list >= 4UL*1024*1024*1024) {
printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n");
return;
}
if (f->next)
f->next = (struct flash_block_list *)virt_to_abs(f->next);
else
- f->next = 0LL;
+ f->next = NULL;
/* make num_blocks into the version/length field */
f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16);
}
if (rtas_firmware_flash_list.next)
rtas_flash_firmware();
- printk("RTAS system-reboot returned %ld\n",
+ printk("RTAS system-reboot returned %d\n",
rtas_call(rtas_token("system-reboot"), 0, 1, NULL));
- for (;;);
+ for (;;);
}
void
{
if (rtas_firmware_flash_list.next)
rtas_flash_bypass_warning();
- /* allow power on only with power button press */
- printk("RTAS power-off returned %ld\n",
- rtas_call(rtas_token("power-off"), 2, 1, NULL,0xffffffff,0xffffffff));
- for (;;);
+ /* allow power on only with power button press */
+ printk("RTAS power-off returned %d\n",
+ rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
+ for (;;);
}
void
{
if (rtas_firmware_flash_list.next)
rtas_flash_bypass_warning();
- rtas_power_off();
+ rtas_power_off();
}
/* Must be in the RMO region, so we place it here */
void rtas_os_term(char *str)
{
- long status;
+ int status;
snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
if (status == RTAS_BUSY)
udelay(1);
else if (status != 0)
- printk(KERN_EMERG "ibm,os-term call failed %ld\n",
+ printk(KERN_EMERG "ibm,os-term call failed %d\n",
status);
} while (status == RTAS_BUSY);
}
-unsigned long rtas_rmo_buf = 0;
asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
{
struct rtas_args args;
unsigned long flags;
+ char * buff_copy;
int nargs;
+ int err_rc = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
nargs * sizeof(rtas_arg_t)) != 0)
return -EFAULT;
+ buff_copy = kmalloc(RTAS_ERROR_LOG_MAX, GFP_KERNEL);
+
spin_lock_irqsave(&rtas.lock, flags);
- get_paca()->xRtas = args;
- enter_rtas((void *)__pa((unsigned long)&get_paca()->xRtas));
- args = get_paca()->xRtas;
+ rtas.args = args;
+ enter_rtas(__pa(&rtas.args));
+ args = rtas.args;
+
+ args.rets = &args.args[nargs];
+
+ /* A -1 return code indicates that the last command couldn't
+ be completed due to a hardware error. */
+ if (args.rets[0] == -1) {
+ err_rc = __fetch_rtas_last_error();
+ if ((err_rc == 0) && buff_copy) {
+ memcpy(buff_copy, rtas_err_buf, RTAS_ERROR_LOG_MAX);
+ }
+ }
spin_unlock_irqrestore(&rtas.lock, flags);
- args.rets = (rtas_arg_t *)&(args.args[nargs]);
- if (args.rets[0] == -1)
- log_rtas_error(&args);
+ if (buff_copy) {
+ if ((args.rets[0] == -1) && (err_rc == 0)) {
+ log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0);
+ }
+ kfree(buff_copy);
+ }
/* Copy out args. */
if (copy_to_user(uargs->args + nargs,
}
#ifdef CONFIG_HOTPLUG_CPU
-/* This version can't take the spinlock. */
+/* This version can't take the spinlock, because it never returns */
+
+struct rtas_args rtas_stop_self_args = {
+ /* The token is initialized for real in setup_system() */
+ .token = RTAS_UNKNOWN_SERVICE,
+ .nargs = 0,
+ .nret = 1,
+ .rets = &rtas_stop_self_args.args[0],
+};
void rtas_stop_self(void)
{
- struct rtas_args *rtas_args = &(get_paca()->xRtas);
+ struct rtas_args *rtas_args = &rtas_stop_self_args;
local_irq_disable();
- rtas_args->token = rtas_token("stop-self");
BUG_ON(rtas_args->token == RTAS_UNKNOWN_SERVICE);
- rtas_args->nargs = 0;
- rtas_args->nret = 1;
- rtas_args->rets = &(rtas_args->args[0]);
- printk("%u %u Ready to die...\n",
+ printk("cpu %u (hwid %u) Ready to die...\n",
smp_processor_id(), hard_smp_processor_id());
- enter_rtas((void *)__pa(rtas_args));
+ enter_rtas(__pa(rtas_args));
panic("Alas, I survived.\n");
}
#endif /* CONFIG_HOTPLUG_CPU */
+/*
+ * Return the firmware-specified size of the error log buffer
+ * for all rtas calls that require an error buffer argument.
+ * This includes 'check-exception' and 'rtas-last-error'.
+ */
+int rtas_get_error_log_max(void)
+{
+ static int rtas_error_log_max;
+ if (rtas_error_log_max)
+ return rtas_error_log_max;
+
+ rtas_error_log_max = rtas_token ("rtas-error-log-max");
+ if ((rtas_error_log_max == RTAS_UNKNOWN_SERVICE) ||
+ (rtas_error_log_max > RTAS_ERROR_LOG_MAX)) {
+ printk (KERN_WARNING "RTAS: bad log buffer size %d\n", rtas_error_log_max);
+ rtas_error_log_max = RTAS_ERROR_LOG_MAX;
+ }
+ return rtas_error_log_max;
+}
+
+/*
+ * Call early during boot, before mem init or bootmem, to retreive the RTAS
+ * informations from the device-tree and allocate the RMO buffer for userland
+ * accesses.
+ */
+void __init rtas_initialize(void)
+{
+ /* Get RTAS dev node and fill up our "rtas" structure with infos
+ * about it.
+ */
+ rtas.dev = of_find_node_by_name(NULL, "rtas");
+ if (rtas.dev) {
+ u64 *basep, *entryp;
+ u32 *sizep;
+
+ basep = (u64 *)get_property(of_chosen, "linux,rtas-base", NULL);
+ sizep = (u32 *)get_property(of_chosen, "linux,rtas-size", NULL);
+ if (basep != NULL && sizep != NULL) {
+ rtas.base = *basep;
+ rtas.size = *sizep;
+ entryp = (u64 *)get_property(of_chosen, "linux,rtas-entry", NULL);
+ if (entryp == NULL) /* Ugh */
+ rtas.entry = rtas.base;
+ else
+ rtas.entry = *entryp;
+ } else
+ rtas.dev = NULL;
+ }
+ /* If RTAS was found, allocate the RMO buffer for it and look for
+ * the stop-self token if any
+ */
+ if (rtas.dev) {
+ unsigned long rtas_region = RTAS_INSTANTIATE_MAX;
+ if (systemcfg->platform == PLATFORM_PSERIES_LPAR)
+ rtas_region = min(lmb.rmo_size, RTAS_INSTANTIATE_MAX);
+
+ rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE,
+ rtas_region);
+
+#ifdef CONFIG_HOTPLUG_CPU
+ rtas_stop_self_args.token = rtas_token("stop-self");
+#endif /* CONFIG_HOTPLUG_CPU */
+ }
+
+}
+
+
EXPORT_SYMBOL(rtas_firmware_flash_list);
EXPORT_SYMBOL(rtas_token);
EXPORT_SYMBOL(rtas_call);
EXPORT_SYMBOL(rtas_get_power_level);
EXPORT_SYMBOL(rtas_set_power_level);
EXPORT_SYMBOL(rtas_set_indicator);
+EXPORT_SYMBOL(rtas_get_error_log_max);
git://git.onelab.eu / linux-2.6.git / blobdiff