#include <linux/tty_flip.h>
#include <linux/wakelock.h>
+#ifdef CONFIG_FIQ_GLUE
#include <asm/fiq_glue.h>
-#include <asm/stacktrace.h>
+#endif
+
+#ifdef CONFIG_FIQ_DEBUGGER_UART_OVERLAY
+#include <linux/of.h>
+#endif
#include <linux/uaccess.h>
#include "fiq_debugger.h"
+#include "fiq_debugger_priv.h"
#include "fiq_debugger_ringbuf.h"
#define DEBUG_MAX 64
#define MAX_FIQ_DEBUGGER_PORTS 4
-#define THREAD_INFO(sp) ((struct thread_info *) \
- ((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
-
struct fiq_debugger_state {
+#ifdef CONFIG_FIQ_GLUE
struct fiq_glue_handler handler;
+#endif
+ struct fiq_debugger_output output;
int fiq;
int uart_irq;
#endif
static bool fiq_kgdb_enable;
+static bool fiq_debugger_disable;
module_param_named(no_sleep, initial_no_sleep, bool, 0644);
module_param_named(debug_enable, initial_debug_enable, bool, 0644);
module_param_named(console_enable, initial_console_enable, bool, 0644);
module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
+module_param_named(disable, fiq_debugger_disable, bool, 0644);
#ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
-static inline void enable_wakeup_irq(struct fiq_debugger_state *state) {}
-static inline void disable_wakeup_irq(struct fiq_debugger_state *state) {}
+static inline
+void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state) {}
+static inline
+void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state) {}
#else
-static inline void enable_wakeup_irq(struct fiq_debugger_state *state)
+static inline
+void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state)
{
if (state->wakeup_irq < 0)
return;
if (!state->wakeup_irq_no_set_wake)
enable_irq_wake(state->wakeup_irq);
}
-static inline void disable_wakeup_irq(struct fiq_debugger_state *state)
+static inline
+void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state)
{
if (state->wakeup_irq < 0)
return;
}
#endif
-static bool inline debug_have_fiq(struct fiq_debugger_state *state)
+static inline bool fiq_debugger_have_fiq(struct fiq_debugger_state *state)
{
return (state->fiq >= 0);
}
-static void debug_force_irq(struct fiq_debugger_state *state)
+#ifdef CONFIG_FIQ_GLUE
+static void fiq_debugger_force_irq(struct fiq_debugger_state *state)
{
unsigned int irq = state->signal_irq;
- if (WARN_ON(!debug_have_fiq(state)))
+ if (WARN_ON(!fiq_debugger_have_fiq(state)))
return;
if (state->pdata->force_irq) {
state->pdata->force_irq(state->pdev, irq);
chip->irq_retrigger(irq_get_irq_data(irq));
}
}
+#endif
-static void debug_uart_enable(struct fiq_debugger_state *state)
+static void fiq_debugger_uart_enable(struct fiq_debugger_state *state)
{
if (state->clk)
clk_enable(state->clk);
state->pdata->uart_enable(state->pdev);
}
-static void debug_uart_disable(struct fiq_debugger_state *state)
+static void fiq_debugger_uart_disable(struct fiq_debugger_state *state)
{
if (state->pdata->uart_disable)
state->pdata->uart_disable(state->pdev);
clk_disable(state->clk);
}
-static void debug_uart_flush(struct fiq_debugger_state *state)
+static void fiq_debugger_uart_flush(struct fiq_debugger_state *state)
{
if (state->pdata->uart_flush)
state->pdata->uart_flush(state->pdev);
}
-static void debug_putc(struct fiq_debugger_state *state, char c)
+static void fiq_debugger_putc(struct fiq_debugger_state *state, char c)
{
state->pdata->uart_putc(state->pdev, c);
}
-static void debug_puts(struct fiq_debugger_state *state, char *s)
+static void fiq_debugger_puts(struct fiq_debugger_state *state, char *s)
{
unsigned c;
while ((c = *s++)) {
if (c == '\n')
- debug_putc(state, '\r');
- debug_putc(state, c);
+ fiq_debugger_putc(state, '\r');
+ fiq_debugger_putc(state, c);
}
}
-static void debug_prompt(struct fiq_debugger_state *state)
+static void fiq_debugger_prompt(struct fiq_debugger_state *state)
{
- debug_puts(state, "debug> ");
+ fiq_debugger_puts(state, "debug> ");
}
-static void dump_kernel_log(struct fiq_debugger_state *state)
+static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
{
char buf[512];
size_t len;
while (kmsg_dump_get_line_nolock(&dumper, true, buf,
sizeof(buf) - 1, &len)) {
buf[len] = 0;
- debug_puts(state, buf);
+ fiq_debugger_puts(state, buf);
}
}
-static char *mode_name(unsigned cpsr)
+static void fiq_debugger_printf(struct fiq_debugger_output *output,
+ const char *fmt, ...)
{
- switch (cpsr & MODE_MASK) {
- case USR_MODE: return "USR";
- case FIQ_MODE: return "FIQ";
- case IRQ_MODE: return "IRQ";
- case SVC_MODE: return "SVC";
- case ABT_MODE: return "ABT";
- case UND_MODE: return "UND";
- case SYSTEM_MODE: return "SYS";
- default: return "???";
- }
-}
-
-static int debug_printf(void *cookie, const char *fmt, ...)
-{
- struct fiq_debugger_state *state = cookie;
+ struct fiq_debugger_state *state;
char buf[256];
va_list ap;
+ state = container_of(output, struct fiq_debugger_state, output);
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
- debug_puts(state, buf);
- return state->debug_abort;
+ fiq_debugger_puts(state, buf);
}
/* Safe outside fiq context */
-static int debug_printf_nfiq(void *cookie, const char *fmt, ...)
+static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
{
struct fiq_debugger_state *state = cookie;
char buf[256];
va_end(ap);
local_irq_save(irq_flags);
- debug_puts(state, buf);
- debug_uart_flush(state);
+ fiq_debugger_puts(state, buf);
+ fiq_debugger_uart_flush(state);
local_irq_restore(irq_flags);
return state->debug_abort;
}
-static void dump_regs(struct fiq_debugger_state *state, unsigned *regs)
-{
- debug_printf(state, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
- regs[0], regs[1], regs[2], regs[3]);
- debug_printf(state, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
- regs[4], regs[5], regs[6], regs[7]);
- debug_printf(state, " r8 %08x r9 %08x r10 %08x r11 %08x mode %s\n",
- regs[8], regs[9], regs[10], regs[11],
- mode_name(regs[16]));
- if ((regs[16] & MODE_MASK) == USR_MODE)
- debug_printf(state, " ip %08x sp %08x lr %08x pc %08x "
- "cpsr %08x\n", regs[12], regs[13], regs[14],
- regs[15], regs[16]);
- else
- debug_printf(state, " ip %08x sp %08x lr %08x pc %08x "
- "cpsr %08x spsr %08x\n", regs[12], regs[13],
- regs[14], regs[15], regs[16], regs[17]);
-}
-
-struct mode_regs {
- unsigned long sp_svc;
- unsigned long lr_svc;
- unsigned long spsr_svc;
-
- unsigned long sp_abt;
- unsigned long lr_abt;
- unsigned long spsr_abt;
-
- unsigned long sp_und;
- unsigned long lr_und;
- unsigned long spsr_und;
-
- unsigned long sp_irq;
- unsigned long lr_irq;
- unsigned long spsr_irq;
-
- unsigned long r8_fiq;
- unsigned long r9_fiq;
- unsigned long r10_fiq;
- unsigned long r11_fiq;
- unsigned long r12_fiq;
- unsigned long sp_fiq;
- unsigned long lr_fiq;
- unsigned long spsr_fiq;
-};
-
-void __naked get_mode_regs(struct mode_regs *regs)
-{
- asm volatile (
- "mrs r1, cpsr\n"
- "msr cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r8 - r14}\n"
- "mrs r2, spsr\n"
- "stmia r0!, {r2}\n"
- "msr cpsr_c, r1\n"
- "bx lr\n");
-}
-
-
-static void dump_allregs(struct fiq_debugger_state *state, unsigned *regs)
-{
- struct mode_regs mode_regs;
- dump_regs(state, regs);
- get_mode_regs(&mode_regs);
- debug_printf(state, " svc: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
- debug_printf(state, " abt: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
- debug_printf(state, " und: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
- debug_printf(state, " irq: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
- debug_printf(state, " fiq: r8 %08x r9 %08x r10 %08x r11 %08x "
- "r12 %08x\n",
- mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
- mode_regs.r11_fiq, mode_regs.r12_fiq);
- debug_printf(state, " fiq: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
-}
-
-static void dump_irqs(struct fiq_debugger_state *state)
+static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
{
int n;
struct irq_desc *desc;
- debug_printf(state, "irqnr total since-last status name\n");
+ fiq_debugger_printf(&state->output,
+ "irqnr total since-last status name\n");
for_each_irq_desc(n, desc) {
struct irqaction *act = desc->action;
if (!act && !kstat_irqs(n))
continue;
- debug_printf(state, "%5d: %10u %11u %8x %s\n", n,
+ fiq_debugger_printf(&state->output, "%5d: %10u %11u %8x %s\n", n,
kstat_irqs(n),
kstat_irqs(n) - state->last_irqs[n],
desc->status_use_accessors,
}
}
-struct stacktrace_state {
- struct fiq_debugger_state *state;
- unsigned int depth;
-};
-
-static int report_trace(struct stackframe *frame, void *d)
-{
- struct stacktrace_state *sts = d;
-
- if (sts->depth) {
- debug_printf(sts->state,
- " pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
- frame->pc, frame->pc, frame->lr, frame->lr,
- frame->sp, frame->fp);
- sts->depth--;
- return 0;
- }
- debug_printf(sts->state, " ...\n");
-
- return sts->depth == 0;
-}
-
-struct frame_tail {
- struct frame_tail *fp;
- unsigned long sp;
- unsigned long lr;
-} __attribute__((packed));
-
-static struct frame_tail *user_backtrace(struct fiq_debugger_state *state,
- struct frame_tail *tail)
-{
- struct frame_tail buftail[2];
-
- /* Also check accessibility of one struct frame_tail beyond */
- if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
- debug_printf(state, " invalid frame pointer %p\n", tail);
- return NULL;
- }
- if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
- debug_printf(state,
- " failed to copy frame pointer %p\n", tail);
- return NULL;
- }
-
- debug_printf(state, " %p\n", buftail[0].lr);
-
- /* frame pointers should strictly progress back up the stack
- * (towards higher addresses) */
- if (tail >= buftail[0].fp)
- return NULL;
-
- return buftail[0].fp-1;
-}
-
-void dump_stacktrace(struct fiq_debugger_state *state,
- struct pt_regs * const regs, unsigned int depth, void *ssp)
-{
- struct frame_tail *tail;
- struct thread_info *real_thread_info = THREAD_INFO(ssp);
- struct stacktrace_state sts;
-
- sts.depth = depth;
- sts.state = state;
- *current_thread_info() = *real_thread_info;
-
- if (!current)
- debug_printf(state, "current NULL\n");
- else
- debug_printf(state, "pid: %d comm: %s\n",
- current->pid, current->comm);
- dump_regs(state, (unsigned *)regs);
-
- if (!user_mode(regs)) {
- struct stackframe frame;
- frame.fp = regs->ARM_fp;
- frame.sp = regs->ARM_sp;
- frame.lr = regs->ARM_lr;
- frame.pc = regs->ARM_pc;
- debug_printf(state,
- " pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
- regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
- regs->ARM_sp, regs->ARM_fp);
- walk_stackframe(&frame, report_trace, &sts);
- return;
- }
-
- tail = ((struct frame_tail *) regs->ARM_fp) - 1;
- while (depth-- && tail && !((unsigned long) tail & 3))
- tail = user_backtrace(state, tail);
-}
-
-static void do_ps(struct fiq_debugger_state *state)
+static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
{
struct task_struct *g;
struct task_struct *p;
unsigned task_state;
static const char stat_nam[] = "RSDTtZX";
- debug_printf(state, "pid ppid prio task pc\n");
+ fiq_debugger_printf(&state->output, "pid ppid prio task pc\n");
read_lock(&tasklist_lock);
do_each_thread(g, p) {
task_state = p->state ? __ffs(p->state) + 1 : 0;
- debug_printf(state,
+ fiq_debugger_printf(&state->output,
"%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
- debug_printf(state, "%-13.13s %c", p->comm,
+ fiq_debugger_printf(&state->output, "%-13.13s %c", p->comm,
task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
if (task_state == TASK_RUNNING)
- debug_printf(state, " running\n");
+ fiq_debugger_printf(&state->output, " running\n");
else
- debug_printf(state, " %08lx\n", thread_saved_pc(p));
+ fiq_debugger_printf(&state->output, " %08lx\n",
+ thread_saved_pc(p));
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
}
#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-static void begin_syslog_dump(struct fiq_debugger_state *state)
+static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
{
state->syslog_dumping = true;
}
-static void end_syslog_dump(struct fiq_debugger_state *state)
+static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
{
state->syslog_dumping = false;
}
#else
extern int do_syslog(int type, char __user *bug, int count);
-static void begin_syslog_dump(struct fiq_debugger_state *state)
+static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
{
do_syslog(5 /* clear */, NULL, 0);
}
-static void end_syslog_dump(struct fiq_debugger_state *state)
+static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
{
- dump_kernel_log(state);
+ fiq_debugger_dump_kernel_log(state);
}
#endif
-static void do_sysrq(struct fiq_debugger_state *state, char rq)
+static void fiq_debugger_do_sysrq(struct fiq_debugger_state *state, char rq)
{
if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
- debug_printf(state, "sysrq-g blocked\n");
+ fiq_debugger_printf(&state->output, "sysrq-g blocked\n");
return;
}
- begin_syslog_dump(state);
+ fiq_debugger_begin_syslog_dump(state);
handle_sysrq(rq);
- end_syslog_dump(state);
+ fiq_debugger_end_syslog_dump(state);
}
#ifdef CONFIG_KGDB
-static void do_kgdb(struct fiq_debugger_state *state)
+static void fiq_debugger_do_kgdb(struct fiq_debugger_state *state)
{
if (!fiq_kgdb_enable) {
- debug_printf(state, "kgdb through fiq debugger not enabled\n");
+ fiq_debugger_printf(&state->output, "kgdb through fiq debugger not enabled\n");
return;
}
- debug_printf(state, "enabling console and triggering kgdb\n");
+ fiq_debugger_printf(&state->output, "enabling console and triggering kgdb\n");
state->console_enable = true;
handle_sysrq('g');
}
#endif
-static void debug_schedule_work(struct fiq_debugger_state *state, char *cmd)
+static void fiq_debugger_schedule_work(struct fiq_debugger_state *state,
+ char *cmd)
{
unsigned long flags;
spin_lock_irqsave(&state->work_lock, flags);
if (state->work_cmd[0] != '\0') {
- debug_printf(state, "work command processor busy\n");
+ fiq_debugger_printf(&state->output, "work command processor busy\n");
spin_unlock_irqrestore(&state->work_lock, flags);
return;
}
schedule_work(&state->work);
}
-static void debug_work(struct work_struct *work)
+static void fiq_debugger_work(struct work_struct *work)
{
struct fiq_debugger_state *state;
char work_cmd[DEBUG_MAX];
else
kernel_restart(NULL);
} else {
- debug_printf(state, "unknown work command '%s'\n", work_cmd);
+ fiq_debugger_printf(&state->output, "unknown work command '%s'\n",
+ work_cmd);
}
}
/* This function CANNOT be called in FIQ context */
-static void debug_irq_exec(struct fiq_debugger_state *state, char *cmd)
+static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
{
if (!strcmp(cmd, "ps"))
- do_ps(state);
+ fiq_debugger_do_ps(state);
if (!strcmp(cmd, "sysrq"))
- do_sysrq(state, 'h');
+ fiq_debugger_do_sysrq(state, 'h');
if (!strncmp(cmd, "sysrq ", 6))
- do_sysrq(state, cmd[6]);
+ fiq_debugger_do_sysrq(state, cmd[6]);
#ifdef CONFIG_KGDB
if (!strcmp(cmd, "kgdb"))
- do_kgdb(state);
+ fiq_debugger_do_kgdb(state);
#endif
if (!strncmp(cmd, "reboot", 6))
- debug_schedule_work(state, cmd);
+ fiq_debugger_schedule_work(state, cmd);
}
-static void debug_help(struct fiq_debugger_state *state)
+static void fiq_debugger_help(struct fiq_debugger_state *state)
{
- debug_printf(state, "FIQ Debugger commands:\n"
+ fiq_debugger_printf(&state->output,
+ "FIQ Debugger commands:\n"
" pc PC status\n"
" regs Register dump\n"
" allregs Extended Register dump\n"
" irqs Interupt status\n"
" kmsg Kernel log\n"
" version Kernel version\n");
- debug_printf(state, " sleep Allow sleep while in FIQ\n"
+ fiq_debugger_printf(&state->output,
+ " sleep Allow sleep while in FIQ\n"
" nosleep Disable sleep while in FIQ\n"
" console Switch terminal to console\n"
" cpu Current CPU\n"
" cpu <number> Switch to CPU<number>\n");
- debug_printf(state, " ps Process list\n"
+ fiq_debugger_printf(&state->output,
+ " ps Process list\n"
" sysrq sysrq options\n"
" sysrq <param> Execute sysrq with <param>\n");
#ifdef CONFIG_KGDB
- debug_printf(state, " kgdb Enter kernel debugger\n");
+ fiq_debugger_printf(&state->output,
+ " kgdb Enter kernel debugger\n");
#endif
}
-static void take_affinity(void *info)
+static void fiq_debugger_take_affinity(void *info)
{
struct fiq_debugger_state *state = info;
struct cpumask cpumask;
irq_set_affinity(state->uart_irq, &cpumask);
}
-static void switch_cpu(struct fiq_debugger_state *state, int cpu)
+static void fiq_debugger_switch_cpu(struct fiq_debugger_state *state, int cpu)
{
- if (!debug_have_fiq(state))
- smp_call_function_single(cpu, take_affinity, state, false);
+ if (!fiq_debugger_have_fiq(state))
+ smp_call_function_single(cpu, fiq_debugger_take_affinity, state,
+ false);
state->current_cpu = cpu;
}
-static bool debug_fiq_exec(struct fiq_debugger_state *state,
- const char *cmd, unsigned *regs, void *svc_sp)
+static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
+ const char *cmd, const struct pt_regs *regs,
+ void *svc_sp)
{
bool signal_helper = false;
if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
- debug_help(state);
+ fiq_debugger_help(state);
} else if (!strcmp(cmd, "pc")) {
- debug_printf(state, " pc %08x cpsr %08x mode %s\n",
- regs[15], regs[16], mode_name(regs[16]));
+ fiq_debugger_dump_pc(&state->output, regs);
} else if (!strcmp(cmd, "regs")) {
- dump_regs(state, regs);
+ fiq_debugger_dump_regs(&state->output, regs);
} else if (!strcmp(cmd, "allregs")) {
- dump_allregs(state, regs);
+ fiq_debugger_dump_allregs(&state->output, regs);
} else if (!strcmp(cmd, "bt")) {
- dump_stacktrace(state, (struct pt_regs *)regs, 100, svc_sp);
+ fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp);
} else if (!strncmp(cmd, "reset", 5)) {
cmd += 5;
while (*cmd == ' ')
machine_restart(NULL);
}
} else if (!strcmp(cmd, "irqs")) {
- dump_irqs(state);
+ fiq_debugger_dump_irqs(state);
} else if (!strcmp(cmd, "kmsg")) {
- dump_kernel_log(state);
+ fiq_debugger_dump_kernel_log(state);
} else if (!strcmp(cmd, "version")) {
- debug_printf(state, "%s\n", linux_banner);
+ fiq_debugger_printf(&state->output, "%s\n", linux_banner);
} else if (!strcmp(cmd, "sleep")) {
state->no_sleep = false;
- debug_printf(state, "enabling sleep\n");
+ fiq_debugger_printf(&state->output, "enabling sleep\n");
} else if (!strcmp(cmd, "nosleep")) {
state->no_sleep = true;
- debug_printf(state, "disabling sleep\n");
+ fiq_debugger_printf(&state->output, "disabling sleep\n");
} else if (!strcmp(cmd, "console")) {
- debug_printf(state, "console mode\n");
- debug_uart_flush(state);
+ fiq_debugger_printf(&state->output, "console mode\n");
+ fiq_debugger_uart_flush(state);
state->console_enable = true;
} else if (!strcmp(cmd, "cpu")) {
- debug_printf(state, "cpu %d\n", state->current_cpu);
+ fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
} else if (!strncmp(cmd, "cpu ", 4)) {
unsigned long cpu = 0;
- if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
- switch_cpu(state, cpu);
+ if (kstrtoul(cmd + 4, 10, &cpu) == 0)
+ fiq_debugger_switch_cpu(state, cpu);
else
- debug_printf(state, "invalid cpu\n");
- debug_printf(state, "cpu %d\n", state->current_cpu);
+ fiq_debugger_printf(&state->output, "invalid cpu\n");
+ fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
} else {
if (state->debug_busy) {
- debug_printf(state,
+ fiq_debugger_printf(&state->output,
"command processor busy. trying to abort.\n");
state->debug_abort = -1;
} else {
return true;
}
if (!state->console_enable)
- debug_prompt(state);
+ fiq_debugger_prompt(state);
return signal_helper;
}
-static void sleep_timer_expired(unsigned long data)
+static void fiq_debugger_sleep_timer_expired(unsigned long data)
{
struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
unsigned long flags;
if (state->uart_enabled && !state->no_sleep) {
if (state->debug_enable && !state->console_enable) {
state->debug_enable = false;
- debug_printf_nfiq(state, "suspending fiq debugger\n");
+ fiq_debugger_printf_nfiq(state,
+ "suspending fiq debugger\n");
}
state->ignore_next_wakeup_irq = true;
- debug_uart_disable(state);
+ fiq_debugger_uart_disable(state);
state->uart_enabled = false;
- enable_wakeup_irq(state);
+ fiq_debugger_enable_wakeup_irq(state);
}
wake_unlock(&state->debugger_wake_lock);
spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
}
-static void handle_wakeup(struct fiq_debugger_state *state)
+static void fiq_debugger_handle_wakeup(struct fiq_debugger_state *state)
{
unsigned long flags;
state->ignore_next_wakeup_irq = false;
} else if (!state->uart_enabled) {
wake_lock(&state->debugger_wake_lock);
- debug_uart_enable(state);
+ fiq_debugger_uart_enable(state);
state->uart_enabled = true;
- disable_wakeup_irq(state);
+ fiq_debugger_disable_wakeup_irq(state);
mod_timer(&state->sleep_timer, jiffies + HZ / 2);
}
spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
}
-static irqreturn_t wakeup_irq_handler(int irq, void *dev)
+static irqreturn_t fiq_debugger_wakeup_irq_handler(int irq, void *dev)
{
struct fiq_debugger_state *state = dev;
if (!state->no_sleep)
- debug_puts(state, "WAKEUP\n");
- handle_wakeup(state);
+ fiq_debugger_puts(state, "WAKEUP\n");
+ fiq_debugger_handle_wakeup(state);
return IRQ_HANDLED;
}
-static void debug_handle_console_irq_context(struct fiq_debugger_state *state)
+static
+void fiq_debugger_handle_console_irq_context(struct fiq_debugger_state *state)
{
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
if (state->tty_port.ops) {
#endif
}
-static void debug_handle_irq_context(struct fiq_debugger_state *state)
+static void fiq_debugger_handle_irq_context(struct fiq_debugger_state *state)
{
if (!state->no_sleep) {
unsigned long flags;
mod_timer(&state->sleep_timer, jiffies + HZ * 5);
spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
}
- debug_handle_console_irq_context(state);
+ fiq_debugger_handle_console_irq_context(state);
if (state->debug_busy) {
- debug_irq_exec(state, state->debug_cmd);
+ fiq_debugger_irq_exec(state, state->debug_cmd);
if (!state->console_enable)
- debug_prompt(state);
+ fiq_debugger_prompt(state);
state->debug_busy = 0;
}
}
-static int debug_getc(struct fiq_debugger_state *state)
+static int fiq_debugger_getc(struct fiq_debugger_state *state)
{
return state->pdata->uart_getc(state->pdev);
}
-static bool debug_handle_uart_interrupt(struct fiq_debugger_state *state,
- int this_cpu, void *regs, void *svc_sp)
+static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
+ int this_cpu, const struct pt_regs *regs, void *svc_sp)
{
int c;
static int last_c;
MAX_UNHANDLED_FIQ_COUNT)
return false;
- debug_printf(state, "fiq_debugger: cpu %d not responding, "
+ fiq_debugger_printf(&state->output,
+ "fiq_debugger: cpu %d not responding, "
"reverting to cpu %d\n", state->current_cpu,
this_cpu);
atomic_set(&state->unhandled_fiq_count, 0);
- switch_cpu(state, this_cpu);
+ fiq_debugger_switch_cpu(state, this_cpu);
return false;
}
state->in_fiq = true;
- while ((c = debug_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
+ while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
count++;
if (!state->debug_enable) {
if ((c == 13) || (c == 10)) {
state->debug_enable = true;
state->debug_count = 0;
- debug_prompt(state);
+ fiq_debugger_prompt(state);
}
} else if (c == FIQ_DEBUGGER_BREAK) {
state->console_enable = false;
- debug_puts(state, "fiq debugger mode\n");
+ fiq_debugger_puts(state, "fiq debugger mode\n");
state->debug_count = 0;
- debug_prompt(state);
+ fiq_debugger_prompt(state);
#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
} else if (state->console_enable && state->tty_rbuf) {
fiq_debugger_ringbuf_push(state->tty_rbuf, c);
} else if ((c >= ' ') && (c < 127)) {
if (state->debug_count < (DEBUG_MAX - 1)) {
state->debug_buf[state->debug_count++] = c;
- debug_putc(state, c);
+ fiq_debugger_putc(state, c);
}
} else if ((c == 8) || (c == 127)) {
if (state->debug_count > 0) {
state->debug_count--;
- debug_putc(state, 8);
- debug_putc(state, ' ');
- debug_putc(state, 8);
+ fiq_debugger_putc(state, 8);
+ fiq_debugger_putc(state, ' ');
+ fiq_debugger_putc(state, 8);
}
} else if ((c == 13) || (c == 10)) {
if (c == '\r' || (c == '\n' && last_c != '\r')) {
- debug_putc(state, '\r');
- debug_putc(state, '\n');
+ fiq_debugger_putc(state, '\r');
+ fiq_debugger_putc(state, '\n');
}
if (state->debug_count) {
state->debug_buf[state->debug_count] = 0;
state->debug_count = 0;
signal_helper |=
- debug_fiq_exec(state, state->debug_buf,
- regs, svc_sp);
+ fiq_debugger_fiq_exec(state,
+ state->debug_buf,
+ regs, svc_sp);
} else {
- debug_prompt(state);
+ fiq_debugger_prompt(state);
}
}
last_c = c;
}
if (!state->console_enable)
- debug_uart_flush(state);
+ fiq_debugger_uart_flush(state);
if (state->pdata->fiq_ack)
state->pdata->fiq_ack(state->pdev, state->fiq);
return signal_helper;
}
-static void debug_fiq(struct fiq_glue_handler *h, void *regs, void *svc_sp)
+#ifdef CONFIG_FIQ_GLUE
+static void fiq_debugger_fiq(struct fiq_glue_handler *h,
+ const struct pt_regs *regs, void *svc_sp)
{
struct fiq_debugger_state *state =
container_of(h, struct fiq_debugger_state, handler);
unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
bool need_irq;
- need_irq = debug_handle_uart_interrupt(state, this_cpu, regs, svc_sp);
+ need_irq = fiq_debugger_handle_uart_interrupt(state, this_cpu, regs,
+ svc_sp);
if (need_irq)
- debug_force_irq(state);
+ fiq_debugger_force_irq(state);
}
+#endif
/*
* When not using FIQs, we only use this single interrupt as an entry point.
* This just effectively takes over the UART interrupt and does all the work
* in this context.
*/
-static irqreturn_t debug_uart_irq(int irq, void *dev)
+static irqreturn_t fiq_debugger_uart_irq(int irq, void *dev)
{
struct fiq_debugger_state *state = dev;
bool not_done;
- handle_wakeup(state);
+ fiq_debugger_handle_wakeup(state);
/* handle the debugger irq in regular context */
- not_done = debug_handle_uart_interrupt(state, smp_processor_id(),
+ not_done = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
get_irq_regs(),
current_thread_info());
if (not_done)
- debug_handle_irq_context(state);
+ fiq_debugger_handle_irq_context(state);
return IRQ_HANDLED;
}
* FIQ handler does what it can and then signals this interrupt to finish the
* job in irq context.
*/
-static irqreturn_t debug_signal_irq(int irq, void *dev)
+static irqreturn_t fiq_debugger_signal_irq(int irq, void *dev)
{
struct fiq_debugger_state *state = dev;
if (state->pdata->force_irq_ack)
state->pdata->force_irq_ack(state->pdev, state->signal_irq);
- debug_handle_irq_context(state);
+ fiq_debugger_handle_irq_context(state);
return IRQ_HANDLED;
}
-static void debug_resume(struct fiq_glue_handler *h)
+#ifdef CONFIG_FIQ_GLUE
+static void fiq_debugger_resume(struct fiq_glue_handler *h)
{
struct fiq_debugger_state *state =
container_of(h, struct fiq_debugger_state, handler);
if (state->pdata->uart_resume)
state->pdata->uart_resume(state->pdev);
}
+#endif
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-struct tty_driver *debug_console_device(struct console *co, int *index)
+struct tty_driver *fiq_debugger_console_device(struct console *co, int *index)
{
*index = co->index;
return fiq_tty_driver;
}
-static void debug_console_write(struct console *co,
+static void fiq_debugger_console_write(struct console *co,
const char *s, unsigned int count)
{
struct fiq_debugger_state *state;
if (!state->console_enable && !state->syslog_dumping)
return;
- debug_uart_enable(state);
+ fiq_debugger_uart_enable(state);
spin_lock_irqsave(&state->console_lock, flags);
while (count--) {
if (*s == '\n')
- debug_putc(state, '\r');
- debug_putc(state, *s++);
+ fiq_debugger_putc(state, '\r');
+ fiq_debugger_putc(state, *s++);
}
- debug_uart_flush(state);
+ fiq_debugger_uart_flush(state);
spin_unlock_irqrestore(&state->console_lock, flags);
- debug_uart_disable(state);
+ fiq_debugger_uart_disable(state);
}
static struct console fiq_debugger_console = {
.name = "ttyFIQ",
- .device = debug_console_device,
- .write = debug_console_write,
+ .device = fiq_debugger_console_device,
+ .write = fiq_debugger_console_write,
.flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
};
if (!state->console_enable)
return count;
- debug_uart_enable(state);
+ fiq_debugger_uart_enable(state);
spin_lock_irq(&state->console_lock);
for (i = 0; i < count; i++)
- debug_putc(state, *buf++);
+ fiq_debugger_putc(state, *buf++);
spin_unlock_irq(&state->console_lock);
- debug_uart_disable(state);
+ fiq_debugger_uart_disable(state);
return count;
}
struct fiq_debugger_state *state = states[line];
int c = NO_POLL_CHAR;
- debug_uart_enable(state);
- if (debug_have_fiq(state)) {
+ fiq_debugger_uart_enable(state);
+ if (fiq_debugger_have_fiq(state)) {
int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
if (count > 0) {
c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
}
} else {
- c = debug_getc(state);
+ c = fiq_debugger_getc(state);
if (c == FIQ_DEBUGGER_NO_CHAR)
c = NO_POLL_CHAR;
}
- debug_uart_disable(state);
+ fiq_debugger_uart_disable(state);
return c;
}
{
struct fiq_debugger_state **states = driver->driver_state;
struct fiq_debugger_state *state = states[line];
- debug_uart_enable(state);
- debug_putc(state, ch);
- debug_uart_disable(state);
+ fiq_debugger_uart_enable(state);
+ fiq_debugger_putc(state, ch);
+ fiq_debugger_uart_disable(state);
}
#endif
return -EINVAL;
state = kzalloc(sizeof(*state), GFP_KERNEL);
- setup_timer(&state->sleep_timer, sleep_timer_expired,
+ state->output.printf = fiq_debugger_printf;
+ setup_timer(&state->sleep_timer, fiq_debugger_sleep_timer_expired,
(unsigned long)state);
state->pdata = pdata;
state->pdev = pdev;
state->signal_irq = platform_get_irq_byname(pdev, "signal");
state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
- INIT_WORK(&state->work, debug_work);
+ INIT_WORK(&state->work, fiq_debugger_work);
spin_lock_init(&state->work_lock);
platform_set_drvdata(pdev, state);
spin_lock_init(&state->sleep_timer_lock);
- if (state->wakeup_irq < 0 && debug_have_fiq(state))
+ if (state->wakeup_irq < 0 && fiq_debugger_have_fiq(state))
state->no_sleep = true;
state->ignore_next_wakeup_irq = !state->no_sleep;
goto err_uart_init;
}
- debug_printf_nfiq(state, "<hit enter %sto activate fiq debugger>\n",
+ fiq_debugger_printf_nfiq(state,
+ "<hit enter %sto activate fiq debugger>\n",
state->no_sleep ? "" : "twice ");
- if (debug_have_fiq(state)) {
- state->handler.fiq = debug_fiq;
- state->handler.resume = debug_resume;
+#ifdef CONFIG_FIQ_GLUE
+ if (fiq_debugger_have_fiq(state)) {
+ state->handler.fiq = fiq_debugger_fiq;
+ state->handler.resume = fiq_debugger_resume;
ret = fiq_glue_register_handler(&state->handler);
if (ret) {
pr_err("%s: could not install fiq handler\n", __func__);
- goto err_register_fiq;
+ goto err_register_irq;
}
pdata->fiq_enable(pdev, state->fiq, 1);
- } else {
- ret = request_irq(state->uart_irq, debug_uart_irq,
+ } else
+#endif
+ {
+ ret = request_irq(state->uart_irq, fiq_debugger_uart_irq,
IRQF_NO_SUSPEND, "debug", state);
if (ret) {
pr_err("%s: could not install irq handler\n", __func__);
clk_disable(state->clk);
if (state->signal_irq >= 0) {
- ret = request_irq(state->signal_irq, debug_signal_irq,
+ ret = request_irq(state->signal_irq, fiq_debugger_signal_irq,
IRQF_TRIGGER_RISING, "debug-signal", state);
if (ret)
pr_err("serial_debugger: could not install signal_irq");
}
if (state->wakeup_irq >= 0) {
- ret = request_irq(state->wakeup_irq, wakeup_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_DISABLED,
+ ret = request_irq(state->wakeup_irq,
+ fiq_debugger_wakeup_irq_handler,
+ IRQF_TRIGGER_FALLING,
"debug-wakeup", state);
if (ret) {
pr_err("serial_debugger: "
}
}
if (state->no_sleep)
- handle_wakeup(state);
+ fiq_debugger_handle_wakeup(state);
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
spin_lock_init(&state->console_lock);
return 0;
err_register_irq:
-err_register_fiq:
if (pdata->uart_free)
pdata->uart_free(pdev);
err_uart_init:
},
};
+#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)
+int fiq_debugger_uart_overlay(void)
+{
+ struct device_node *onp = of_find_node_by_path("/uart_overlay@0");
+ int ret;
+
+ if (!onp) {
+ pr_err("serial_debugger: uart overlay not found\n");
+ return -ENODEV;
+ }
+
+ ret = of_overlay_create(onp);
+ if (ret < 0) {
+ pr_err("serial_debugger: fail to create overlay: %d\n", ret);
+ of_node_put(onp);
+ return ret;
+ }
+
+ pr_info("serial_debugger: uart overlay applied\n");
+ return 0;
+}
+#endif
+
static int __init fiq_debugger_init(void)
{
+ if (fiq_debugger_disable) {
+ pr_err("serial_debugger: disabled\n");
+ return -ENODEV;
+ }
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
fiq_debugger_tty_init();
+#endif
+#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)
+ fiq_debugger_uart_overlay();
#endif
return platform_driver_register(&fiq_debugger_driver);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff