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intel_reg_dumper: Add a single register decode mode

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From time to time, one would like to decode a register value that have
been captured at a certain point in time (and say printed out with a
printk). intel_reg_dumper has all the knowledge to do that and this
patch adds a way to ask it to decode a value.

Example usage:

$ ./tools/intel_reg_dumper PCH_PP_CONTROL 0xabcd0002
       PCH_PP_CONTROL: 0xabcd0002 (blacklight disabled, power...

v2: friendlier invocation (Chris Wilson)
v3: remove unecessary casts and use strcasecmp (Jani Nikula)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2012-09-03 16:16:26 +01:00 committed by Daniel Vetter
parent bc62567b77
commit 2fd80079c0
1 changed files with 84 additions and 13 deletions
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97
tools/intel_reg_dumper.c
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@ -1911,26 +1911,31 @@ static struct reg_debug i945gm_mi_regs[] = {
DEFINEREG(ECOSKPD),
};
static void
_intel_dump_reg(struct reg_debug *reg, uint32_t val)
{
char debug[1024];
if (reg->debug_output != NULL) {
reg->debug_output(debug, sizeof(debug), reg->reg, val);
printf("%30.30s: 0x%08x (%s)\n",
reg->name, val, debug);
} else {
printf("%30.30s: 0x%08x\n", reg->name, val);
}
}
#define intel_dump_regs(regs) _intel_dump_regs(regs, ARRAY_SIZE(regs))
static void
_intel_dump_regs(struct reg_debug *regs, int count)
{
char debug[1024];
int i;
for (i = 0; i < count; i++) {
uint32_t val = INREG(regs[i].reg);
if (regs[i].debug_output != NULL) {
regs[i].debug_output(debug, sizeof(debug), regs[i].reg, val);
printf("%30.30s: 0x%08x (%s)\n",
regs[i].name,
(unsigned int)val, debug);
} else {
printf("%30.30s: 0x%08x\n", regs[i].name,
(unsigned int)val);
}
_intel_dump_reg(&regs[i], val);
}
}
@ -1964,6 +1969,54 @@ static struct reg_debug gen6_rp_debug_regs[] = {
DEFINEREG(GEN6_PMINTRMSK),
};
#define DECLARE_REGS(r) { .regs = r, .count = ARRAY_SIZE(r) }
static struct {
struct reg_debug *regs;
int count;
} known_registers[] = {
DECLARE_REGS(ironlake_debug_regs),
DECLARE_REGS(i945gm_mi_regs),
DECLARE_REGS(intel_debug_regs),
DECLARE_REGS(gen6_rp_debug_regs),
DECLARE_REGS(haswell_debug_regs)
};
#undef DECLARE_REGS
static struct reg_debug *
find_register_by_name(struct reg_debug *regs, int count,
const char *name)
{
int i;
for (i = 0; i < count; i++)
if (strcasecmp(name, regs[i].name) == 0)
return &regs[i];
return NULL;
}
static void
decode_register(const char *name, uint32_t val)
{
int i;
struct reg_debug *reg = NULL;
for (i = 0; i < ARRAY_SIZE(known_registers); i++) {
reg = find_register_by_name(known_registers[i].regs,
known_registers[i].count,
name);
if (reg)
break;
}
if (!reg) {
fprintf(stderr, "Unknown register: %s\n", name);
return;
}
_intel_dump_reg(reg, val);
}
static void
intel_dump_other_regs(void)
{
@ -2172,6 +2225,7 @@ intel_dump_other_regs(void)
static void print_usage(void)
{
printf("Usage: intel_reg_dumper [options] [file]\n"
" intel_reg_dumper [options] register value\n"
"Options:\n"
" -d id when a dump file is used, use 'id' as device id (in "
"hex)\n"
@ -2181,8 +2235,9 @@ static void print_usage(void)
int main(int argc, char** argv)
{
struct pci_device *pci_dev;
int opt;
char *file = NULL;
int opt, n_args;
char *file = NULL, *reg_name = NULL;
uint32_t reg_val;
while ((opt = getopt(argc, argv, "d:h")) != -1) {
switch (opt) {
@ -2197,8 +2252,24 @@ int main(int argc, char** argv)
return 1;
}
}
if (optind < argc)
n_args = argc - optind;
if (n_args == 1) {
file = argv[optind];
} else if (n_args == 2) {
reg_name = argv[optind];
reg_val = strtoul(argv[optind + 1], NULL, 0);
} else if (n_args) {
print_usage();
return 1;
}
/* the tool operates in "single" mode, decode a single register given
* on the command line: intel_reg_dumper PCH_PP_CONTROL 0xabcd0002 */
if (reg_name) {
decode_register(reg_name, reg_val);
return 0;
}
if (file) {
intel_map_file(file);