+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2012 The Chromium OS Authors.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <mapmem.h>
+#include <time.h>
#include <trace.h>
+#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/sections.h>
DECLARE_GLOBAL_DATA_PTR;
-static char trace_enabled __attribute__((section(".data")));
-static char trace_inited __attribute__((section(".data")));
+static char trace_enabled __section(".data");
+static char trace_inited __section(".data");
/* The header block at the start of the trace memory area */
struct trace_hdr {
return offset / FUNC_SITE_SIZE;
}
+#if defined(CONFIG_EFI_LOADER) && (defined(CONFIG_ARM) || defined(CONFIG_RISCV))
+
+/**
+ * trace_gd - the value of the gd register
+ */
+static volatile gd_t *trace_gd;
+
+/**
+ * trace_save_gd() - save the value of the gd register
+ */
+static void __attribute__((no_instrument_function)) trace_save_gd(void)
+{
+ trace_gd = gd;
+}
+
+/**
+ * trace_swap_gd() - swap between U-Boot and application gd register value
+ *
+ * An UEFI application may change the value of the register that gd lives in.
+ * But some of our functions like get_ticks() access this register. So we
+ * have to set the gd register to the U-Boot value when entering a trace
+ * point and set it back to the application value when exiting the trace point.
+ */
+static void __attribute__((no_instrument_function)) trace_swap_gd(void)
+{
+ volatile gd_t *temp_gd = trace_gd;
+
+ trace_gd = gd;
+ set_gd(temp_gd);
+}
+
+#else
+
+static void __attribute__((no_instrument_function)) trace_save_gd(void)
+{
+}
+
+static void __attribute__((no_instrument_function)) trace_swap_gd(void)
+{
+}
+
+#endif
+
static void __attribute__((no_instrument_function)) add_ftrace(void *func_ptr,
void *caller, ulong flags)
{
}
/**
- * This is called on every function entry
+ * __cyg_profile_func_enter() - record function entry
*
* We add to our tally for this function and add to the list of called
* functions.
*
- * @param func_ptr Pointer to function being entered
- * @param caller Pointer to function which called this function
+ * @func_ptr: pointer to function being entered
+ * @caller: pointer to function which called this function
*/
void __attribute__((no_instrument_function)) __cyg_profile_func_enter(
void *func_ptr, void *caller)
if (trace_enabled) {
int func;
+ trace_swap_gd();
add_ftrace(func_ptr, caller, FUNCF_ENTRY);
func = func_ptr_to_num(func_ptr);
if (func < hdr->func_count) {
hdr->depth++;
if (hdr->depth > hdr->depth_limit)
hdr->max_depth = hdr->depth;
+ trace_swap_gd();
}
}
/**
- * This is called on every function exit
- *
- * We do nothing here.
+ * __cyg_profile_func_exit() - record function exit
*
- * @param func_ptr Pointer to function being entered
- * @param caller Pointer to function which called this function
+ * @func_ptr: pointer to function being entered
+ * @caller: pointer to function which called this function
*/
void __attribute__((no_instrument_function)) __cyg_profile_func_exit(
void *func_ptr, void *caller)
{
if (trace_enabled) {
+ trace_swap_gd();
add_ftrace(func_ptr, caller, FUNCF_EXIT);
hdr->depth--;
+ trace_swap_gd();
}
}
/**
- * Produce a list of called functions
+ * trace_list_functions() - produce a list of called functions
*
* The information is written into the supplied buffer - a header followed
* by a list of function records.
*
- * @param buff Buffer to place list into
- * @param buff_size Size of buffer
- * @param needed Returns size of buffer needed, which may be
- * greater than buff_size if we ran out of space.
- * @return 0 if ok, -1 if space was exhausted
+ * @buff: buffer to place list into
+ * @buff_size: size of buffer
+ * @needed: returns size of buffer needed, which may be
+ * greater than buff_size if we ran out of space.
+ * Return: 0 if ok, -ENOSPC if space was exhausted
*/
-int trace_list_functions(void *buff, int buff_size, unsigned int *needed)
+int trace_list_functions(void *buff, size_t buff_size, size_t *needed)
{
struct trace_output_hdr *output_hdr = NULL;
void *end, *ptr = buff;
- int func;
- int upto;
+ size_t func;
+ size_t upto;
end = buff ? buff + buff_size : NULL;
/* Add information about each function */
for (func = upto = 0; func < hdr->func_count; func++) {
- int calls = hdr->call_accum[func];
+ size_t calls = hdr->call_accum[func];
if (!calls)
continue;
/* Work out how must of the buffer we used */
*needed = ptr - buff;
if (ptr > end)
- return -1;
+ return -ENOSPC;
+
return 0;
}
-int trace_list_calls(void *buff, int buff_size, unsigned *needed)
+/**
+ * trace_list_functions() - produce a list of function calls
+ *
+ * The information is written into the supplied buffer - a header followed
+ * by a list of function records.
+ *
+ * @buff: buffer to place list into
+ * @buff_size: size of buffer
+ * @needed: returns size of buffer needed, which may be
+ * greater than buff_size if we ran out of space.
+ * Return: 0 if ok, -ENOSPC if space was exhausted
+ */
+int trace_list_calls(void *buff, size_t buff_size, size_t *needed)
{
struct trace_output_hdr *output_hdr = NULL;
void *end, *ptr = buff;
- int rec, upto;
- int count;
+ size_t rec, upto;
+ size_t count;
end = buff ? buff + buff_size : NULL;
/* Work out how must of the buffer we used */
*needed = ptr - buff;
if (ptr > end)
- return -1;
+ return -ENOSPC;
+
return 0;
}
-/* Print basic information about tracing */
+/**
+ * trace_print_stats() - print basic information about tracing
+ */
void trace_print_stats(void)
{
ulong count;
}
/**
- * Init the tracing system ready for used, and enable it
+ * trace_init() - initialize the tracing system and enable it
*
- * @param buff Pointer to trace buffer
- * @param buff_size Size of trace buffer
+ * @buff: Pointer to trace buffer
+ * @buff_size: Size of trace buffer
+ * Return: 0 if ok
*/
int __attribute__((no_instrument_function)) trace_init(void *buff,
size_t buff_size)
size_t needed;
int was_disabled = !trace_enabled;
+ trace_save_gd();
+
if (!was_disabled) {
#ifdef CONFIG_TRACE_EARLY
char *end;
trace_enabled = 0;
hdr = map_sysmem(CONFIG_TRACE_EARLY_ADDR,
CONFIG_TRACE_EARLY_SIZE);
- end = (char *)&hdr->ftrace[hdr->ftrace_count];
+ end = (char *)&hdr->ftrace[min(hdr->ftrace_count,
+ hdr->ftrace_size)];
used = end - (char *)hdr;
printf("trace: copying %08lx bytes of early data from %x to %08lx\n",
used, CONFIG_TRACE_EARLY_ADDR,
memcpy(buff, hdr, used);
#else
puts("trace: already enabled\n");
- return -1;
+ return -EALREADY;
#endif
}
hdr = (struct trace_hdr *)buff;
if (needed > buff_size) {
printf("trace: buffer size %zd bytes: at least %zd needed\n",
buff_size, needed);
- return -1;
+ return -ENOSPC;
}
if (was_disabled)
add_textbase();
puts("trace: enabled\n");
- hdr->depth_limit = 15;
+ hdr->depth_limit = CONFIG_TRACE_CALL_DEPTH_LIMIT;
trace_enabled = 1;
trace_inited = 1;
+
return 0;
}
#ifdef CONFIG_TRACE_EARLY
+/**
+ * trace_early_init() - initialize the tracing system for early tracing
+ *
+ * Return: 0 if ok, -ENOSPC if not enough memory is available
+ */
int __attribute__((no_instrument_function)) trace_early_init(void)
{
ulong func_count = gd->mon_len / FUNC_SITE_SIZE;
if (needed > buff_size) {
printf("trace: buffer size is %zd bytes, at least %zd needed\n",
buff_size, needed);
- return -1;
+ return -ENOSPC;
}
memset(hdr, '\0', needed);
hdr->ftrace = (struct trace_call *)((char *)hdr + needed);
hdr->ftrace_size = (buff_size - needed) / sizeof(*hdr->ftrace);
add_textbase();
- hdr->depth_limit = 200;
+ hdr->depth_limit = CONFIG_TRACE_EARLY_CALL_DEPTH_LIMIT;
printf("trace: early enable at %08x\n", CONFIG_TRACE_EARLY_ADDR);
trace_enabled = 1;
+
return 0;
}
#endif
projects / platform / kernel / u-boot.git / blobdiff