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-rw-r--r--arch/cris/arch-v32/kernel/debugport.c82
-rw-r--r--arch/cris/arch-v32/kernel/time.c29
2 files changed, 74 insertions, 37 deletions
diff --git a/arch/cris/arch-v32/kernel/debugport.c b/arch/cris/arch-v32/kernel/debugport.c
index 610909b003f6..02e33ebe51ec 100644
--- a/arch/cris/arch-v32/kernel/debugport.c
+++ b/arch/cris/arch-v32/kernel/debugport.c
@@ -3,7 +3,9 @@
*/
#include <linux/console.h>
+#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/string.h>
#include <hwregs/reg_rdwr.h>
#include <hwregs/reg_map.h>
#include <hwregs/ser_defs.h>
@@ -65,6 +67,7 @@ struct dbg_port ports[] =
},
#endif
};
+
static struct dbg_port *port =
#if defined(CONFIG_ETRAX_DEBUG_PORT0)
&ports[0];
@@ -97,14 +100,19 @@ static struct dbg_port *kgdb_port =
#endif
#endif
-static void
-start_port(struct dbg_port* p)
+static void start_port(struct dbg_port *p)
{
- if (!p)
- return;
+ /* Set up serial port registers */
+ reg_ser_rw_tr_ctrl tr_ctrl = {0};
+ reg_ser_rw_tr_dma_en tr_dma_en = {0};
- if (p->started)
+ reg_ser_rw_rec_ctrl rec_ctrl = {0};
+ reg_ser_rw_tr_baud_div tr_baud_div = {0};
+ reg_ser_rw_rec_baud_div rec_baud_div = {0};
+
+ if (!p || p->started)
return;
+
p->started = 1;
if (p->nbr == 1)
@@ -118,36 +126,24 @@ start_port(struct dbg_port* p)
crisv32_pinmux_alloc_fixed(pinmux_ser4);
#endif
- /* Set up serial port registers */
- reg_ser_rw_tr_ctrl tr_ctrl = {0};
- reg_ser_rw_tr_dma_en tr_dma_en = {0};
-
- reg_ser_rw_rec_ctrl rec_ctrl = {0};
- reg_ser_rw_tr_baud_div tr_baud_div = {0};
- reg_ser_rw_rec_baud_div rec_baud_div = {0};
-
tr_ctrl.base_freq = rec_ctrl.base_freq = regk_ser_f29_493;
tr_dma_en.en = rec_ctrl.dma_mode = regk_ser_no;
tr_baud_div.div = rec_baud_div.div = 29493000 / p->baudrate / 8;
tr_ctrl.en = rec_ctrl.en = 1;
- if (p->parity == 'O')
- {
+ if (p->parity == 'O') {
tr_ctrl.par_en = regk_ser_yes;
tr_ctrl.par = regk_ser_odd;
rec_ctrl.par_en = regk_ser_yes;
rec_ctrl.par = regk_ser_odd;
- }
- else if (p->parity == 'E')
- {
+ } else if (p->parity == 'E') {
tr_ctrl.par_en = regk_ser_yes;
tr_ctrl.par = regk_ser_even;
rec_ctrl.par_en = regk_ser_yes;
rec_ctrl.par = regk_ser_odd;
}
- if (p->bits == 7)
- {
+ if (p->bits == 7) {
tr_ctrl.data_bits = regk_ser_bits7;
rec_ctrl.data_bits = regk_ser_bits7;
}
@@ -161,8 +157,7 @@ start_port(struct dbg_port* p)
#ifdef CONFIG_ETRAX_KGDB
/* Use polling to get a single character from the kernel debug port */
-int
-getDebugChar(void)
+int getDebugChar(void)
{
reg_ser_rs_stat_din stat;
reg_ser_rw_ack_intr ack_intr = { 0 };
@@ -179,8 +174,7 @@ getDebugChar(void)
}
/* Use polling to put a single character to the kernel debug port */
-void
-putDebugChar(int val)
+void putDebugChar(int val)
{
reg_ser_r_stat_din stat;
do {
@@ -190,12 +184,48 @@ putDebugChar(int val)
}
#endif /* CONFIG_ETRAX_KGDB */
+static void __init early_putch(int c)
+{
+ reg_ser_r_stat_din stat;
+ /* Wait until transmitter is ready and send. */
+ do
+ stat = REG_RD(ser, port->instance, r_stat_din);
+ while (!stat.tr_rdy);
+ REG_WR_INT(ser, port->instance, rw_dout, c);
+}
+
+static void __init
+early_console_write(struct console *con, const char *s, unsigned n)
+{
+ extern void reset_watchdog(void);
+ int i;
+
+ /* Send data. */
+ for (i = 0; i < n; i++) {
+ /* TODO: the '\n' -> '\n\r' translation should be done at the
+ receiver. Remove it when the serial driver removes it. */
+ if (s[i] == '\n')
+ early_putch('\r');
+ early_putch(s[i]);
+ reset_watchdog();
+ }
+}
+
+static struct console early_console_dev __initdata = {
+ .name = "early",
+ .write = early_console_write,
+ .flags = CON_PRINTBUFFER | CON_BOOT,
+ .index = -1
+};
+
/* Register console for printk's, etc. */
-int __init
-init_etrax_debug(void)
+int __init init_etrax_debug(void)
{
start_port(port);
+ /* Register an early console if a debug port was chosen. */
+ register_console(&early_console_dev);
+
#ifdef CONFIG_ETRAX_KGDB
start_port(kgdb_port);
#endif /* CONFIG_ETRAX_KGDB */
diff --git a/arch/cris/arch-v32/kernel/time.c b/arch/cris/arch-v32/kernel/time.c
index ee66866538f8..eb74dabbeb96 100644
--- a/arch/cris/arch-v32/kernel/time.c
+++ b/arch/cris/arch-v32/kernel/time.c
@@ -14,6 +14,7 @@
#include <linux/init.h>
#include <linux/threads.h>
#include <linux/cpufreq.h>
+#include <linux/mm.h>
#include <asm/types.h>
#include <asm/signal.h>
#include <asm/io.h>
@@ -56,7 +57,6 @@ static int __init etrax_init_cont_rotime(void)
}
arch_initcall(etrax_init_cont_rotime);
-
unsigned long timer_regs[NR_CPUS] =
{
regi_timer0,
@@ -68,9 +68,8 @@ unsigned long timer_regs[NR_CPUS] =
extern int set_rtc_mmss(unsigned long nowtime);
#ifdef CONFIG_CPU_FREQ
-static int
-cris_time_freq_notifier(struct notifier_block *nb, unsigned long val,
- void *data);
+static int cris_time_freq_notifier(struct notifier_block *nb,
+ unsigned long val, void *data);
static struct notifier_block cris_time_freq_notifier_block = {
.notifier_call = cris_time_freq_notifier,
@@ -87,7 +86,6 @@ unsigned long get_ns_in_jiffie(void)
return ns;
}
-
/* From timer MDS describing the hardware watchdog:
* 4.3.1 Watchdog Operation
* The watchdog timer is an 8-bit timer with a configurable start value.
@@ -109,11 +107,18 @@ static short int watchdog_key = 42; /* arbitrary 7 bit number */
* is used though, so set this really low. */
#define WATCHDOG_MIN_FREE_PAGES 8
+/* for reliable NICE_DOGGY behaviour */
+static int bite_in_progress;
+
void reset_watchdog(void)
{
#if defined(CONFIG_ETRAX_WATCHDOG)
reg_timer_rw_wd_ctrl wd_ctrl = { 0 };
+#if defined(CONFIG_ETRAX_WATCHDOG_NICE_DOGGY)
+ if (unlikely(bite_in_progress))
+ return;
+#endif
/* Only keep watchdog happy as long as we have memory left! */
if(nr_free_pages() > WATCHDOG_MIN_FREE_PAGES) {
/* Reset the watchdog with the inverse of the old key */
@@ -148,7 +153,9 @@ void handle_watchdog_bite(struct pt_regs *regs)
#if defined(CONFIG_ETRAX_WATCHDOG)
extern int cause_of_death;
+ nmi_enter();
oops_in_progress = 1;
+ bite_in_progress = 1;
printk(KERN_WARNING "Watchdog bite\n");
/* Check if forced restart or unexpected watchdog */
@@ -170,6 +177,7 @@ void handle_watchdog_bite(struct pt_regs *regs)
printk(KERN_WARNING "Oops: bitten by watchdog\n");
show_registers(regs);
oops_in_progress = 0;
+ printk("\n"); /* Flush mtdoops. */
#ifndef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
reset_watchdog();
#endif
@@ -202,7 +210,7 @@ static inline irqreturn_t timer_interrupt(int irq, void *dev_id)
/* Reset watchdog otherwise it resets us! */
reset_watchdog();
- /* Update statistics. */
+ /* Update statistics. */
update_process_times(user_mode(regs));
cris_do_profile(regs); /* Save profiling information */
@@ -213,7 +221,7 @@ static inline irqreturn_t timer_interrupt(int irq, void *dev_id)
/* Call the real timer interrupt handler */
xtime_update(1);
- return IRQ_HANDLED;
+ return IRQ_HANDLED;
}
/* Timer is IRQF_SHARED so drivers can add stuff to the timer irq chain. */
@@ -293,14 +301,13 @@ void __init time_init(void)
#ifdef CONFIG_CPU_FREQ
cpufreq_register_notifier(&cris_time_freq_notifier_block,
- CPUFREQ_TRANSITION_NOTIFIER);
+ CPUFREQ_TRANSITION_NOTIFIER);
#endif
}
#ifdef CONFIG_CPU_FREQ
-static int
-cris_time_freq_notifier(struct notifier_block *nb, unsigned long val,
- void *data)
+static int cris_time_freq_notifier(struct notifier_block *nb,
+ unsigned long val, void *data)
{
struct cpufreq_freqs *freqs = data;
if (val == CPUFREQ_POSTCHANGE) {
generated by cgit v1.2.3 (git 2.0.4) at 2025-01-27 03:47:00 +0000