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-rw-r--r--scripts/dtc/checks.c361
1 files changed, 319 insertions, 42 deletions
diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index 3d18e45374c8..5adfc8f52b4f 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -72,17 +72,16 @@ struct check {
#define CHECK(_nm, _fn, _d, ...) \
CHECK_ENTRY(_nm, _fn, _d, false, false, __VA_ARGS__)
-#ifdef __GNUC__
-static inline void check_msg(struct check *c, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
-#endif
-static inline void check_msg(struct check *c, const char *fmt, ...)
+static inline void PRINTF(3, 4) check_msg(struct check *c, struct dt_info *dti,
+ const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if ((c->warn && (quiet < 1))
|| (c->error && (quiet < 2))) {
- fprintf(stderr, "%s (%s): ",
+ fprintf(stderr, "%s: %s (%s): ",
+ strcmp(dti->outname, "-") ? dti->outname : "<stdout>",
(c->error) ? "ERROR" : "Warning", c->name);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
@@ -90,11 +89,11 @@ static inline void check_msg(struct check *c, const char *fmt, ...)
va_end(ap);
}
-#define FAIL(c, ...) \
- do { \
- TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
- (c)->status = FAILED; \
- check_msg((c), __VA_ARGS__); \
+#define FAIL(c, dti, ...) \
+ do { \
+ TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
+ (c)->status = FAILED; \
+ check_msg((c), dti, __VA_ARGS__); \
} while (0)
static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
@@ -127,7 +126,7 @@ static bool run_check(struct check *c, struct dt_info *dti)
error = error || run_check(prq, dti);
if (prq->status != PASSED) {
c->status = PREREQ;
- check_msg(c, "Failed prerequisite '%s'",
+ check_msg(c, dti, "Failed prerequisite '%s'",
c->prereq[i]->name);
}
}
@@ -157,7 +156,7 @@ out:
static inline void check_always_fail(struct check *c, struct dt_info *dti,
struct node *node)
{
- FAIL(c, "always_fail check");
+ FAIL(c, dti, "always_fail check");
}
CHECK(always_fail, check_always_fail, NULL);
@@ -172,7 +171,7 @@ static void check_is_string(struct check *c, struct dt_info *dti,
return; /* Not present, assumed ok */
if (!data_is_one_string(prop->val))
- FAIL(c, "\"%s\" property in %s is not a string",
+ FAIL(c, dti, "\"%s\" property in %s is not a string",
propname, node->fullpath);
}
#define WARNING_IF_NOT_STRING(nm, propname) \
@@ -191,7 +190,7 @@ static void check_is_cell(struct check *c, struct dt_info *dti,
return; /* Not present, assumed ok */
if (prop->val.len != sizeof(cell_t))
- FAIL(c, "\"%s\" property in %s is not a single cell",
+ FAIL(c, dti, "\"%s\" property in %s is not a single cell",
propname, node->fullpath);
}
#define WARNING_IF_NOT_CELL(nm, propname) \
@@ -213,7 +212,7 @@ static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
child2;
child2 = child2->next_sibling)
if (streq(child->name, child2->name))
- FAIL(c, "Duplicate node name %s",
+ FAIL(c, dti, "Duplicate node name %s",
child->fullpath);
}
ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
@@ -228,7 +227,7 @@ static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
if (prop2->deleted)
continue;
if (streq(prop->name, prop2->name))
- FAIL(c, "Duplicate property name %s in %s",
+ FAIL(c, dti, "Duplicate property name %s in %s",
prop->name, node->fullpath);
}
}
@@ -239,6 +238,7 @@ ERROR(duplicate_property_names, check_duplicate_property_names, NULL);
#define UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define DIGITS "0123456789"
#define PROPNODECHARS LOWERCASE UPPERCASE DIGITS ",._+*#?-"
+#define PROPNODECHARSSTRICT LOWERCASE UPPERCASE DIGITS ",-"
static void check_node_name_chars(struct check *c, struct dt_info *dti,
struct node *node)
@@ -246,16 +246,27 @@ static void check_node_name_chars(struct check *c, struct dt_info *dti,
int n = strspn(node->name, c->data);
if (n < strlen(node->name))
- FAIL(c, "Bad character '%c' in node %s",
+ FAIL(c, dti, "Bad character '%c' in node %s",
node->name[n], node->fullpath);
}
ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");
+static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
+ struct node *node)
+{
+ int n = strspn(node->name, c->data);
+
+ if (n < node->basenamelen)
+ FAIL(c, dti, "Character '%c' not recommended in node %s",
+ node->name[n], node->fullpath);
+}
+CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);
+
static void check_node_name_format(struct check *c, struct dt_info *dti,
struct node *node)
{
if (strchr(get_unitname(node), '@'))
- FAIL(c, "Node %s has multiple '@' characters in name",
+ FAIL(c, dti, "Node %s has multiple '@' characters in name",
node->fullpath);
}
ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);
@@ -274,11 +285,11 @@ static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
if (prop) {
if (!unitname[0])
- FAIL(c, "Node %s has a reg or ranges property, but no unit name",
+ FAIL(c, dti, "Node %s has a reg or ranges property, but no unit name",
node->fullpath);
} else {
if (unitname[0])
- FAIL(c, "Node %s has a unit name, but no reg property",
+ FAIL(c, dti, "Node %s has a unit name, but no reg property",
node->fullpath);
}
}
@@ -293,12 +304,44 @@ static void check_property_name_chars(struct check *c, struct dt_info *dti,
int n = strspn(prop->name, c->data);
if (n < strlen(prop->name))
- FAIL(c, "Bad character '%c' in property name \"%s\", node %s",
+ FAIL(c, dti, "Bad character '%c' in property name \"%s\", node %s",
prop->name[n], prop->name, node->fullpath);
}
}
ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);
+static void check_property_name_chars_strict(struct check *c,
+ struct dt_info *dti,
+ struct node *node)
+{
+ struct property *prop;
+
+ for_each_property(node, prop) {
+ const char *name = prop->name;
+ int n = strspn(name, c->data);
+
+ if (n == strlen(prop->name))
+ continue;
+
+ /* Certain names are whitelisted */
+ if (streq(name, "device_type"))
+ continue;
+
+ /*
+ * # is only allowed at the beginning of property names not counting
+ * the vendor prefix.
+ */
+ if (name[n] == '#' && ((n == 0) || (name[n-1] == ','))) {
+ name += n + 1;
+ n = strspn(name, c->data);
+ }
+ if (n < strlen(name))
+ FAIL(c, dti, "Character '%c' not recommended in property name \"%s\", node %s",
+ name[n], prop->name, node->fullpath);
+ }
+}
+CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);
+
#define DESCLABEL_FMT "%s%s%s%s%s"
#define DESCLABEL_ARGS(node,prop,mark) \
((mark) ? "value of " : ""), \
@@ -327,7 +370,7 @@ static void check_duplicate_label(struct check *c, struct dt_info *dti,
return;
if ((othernode != node) || (otherprop != prop) || (othermark != mark))
- FAIL(c, "Duplicate label '%s' on " DESCLABEL_FMT
+ FAIL(c, dti, "Duplicate label '%s' on " DESCLABEL_FMT
" and " DESCLABEL_FMT,
label, DESCLABEL_ARGS(node, prop, mark),
DESCLABEL_ARGS(othernode, otherprop, othermark));
@@ -367,7 +410,7 @@ static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
return 0;
if (prop->val.len != sizeof(cell_t)) {
- FAIL(c, "%s has bad length (%d) %s property",
+ FAIL(c, dti, "%s has bad length (%d) %s property",
node->fullpath, prop->val.len, prop->name);
return 0;
}
@@ -379,7 +422,7 @@ static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
/* "Set this node's phandle equal to some
* other node's phandle". That's nonsensical
* by construction. */ {
- FAIL(c, "%s in %s is a reference to another node",
+ FAIL(c, dti, "%s in %s is a reference to another node",
prop->name, node->fullpath);
}
/* But setting this node's phandle equal to its own
@@ -393,7 +436,7 @@ static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
phandle = propval_cell(prop);
if ((phandle == 0) || (phandle == -1)) {
- FAIL(c, "%s has bad value (0x%x) in %s property",
+ FAIL(c, dti, "%s has bad value (0x%x) in %s property",
node->fullpath, phandle, prop->name);
return 0;
}
@@ -420,7 +463,7 @@ static void check_explicit_phandles(struct check *c, struct dt_info *dti,
return;
if (linux_phandle && phandle && (phandle != linux_phandle))
- FAIL(c, "%s has mismatching 'phandle' and 'linux,phandle'"
+ FAIL(c, dti, "%s has mismatching 'phandle' and 'linux,phandle'"
" properties", node->fullpath);
if (linux_phandle && !phandle)
@@ -428,7 +471,7 @@ static void check_explicit_phandles(struct check *c, struct dt_info *dti,
other = get_node_by_phandle(root, phandle);
if (other && (other != node)) {
- FAIL(c, "%s has duplicated phandle 0x%x (seen before at %s)",
+ FAIL(c, dti, "%s has duplicated phandle 0x%x (seen before at %s)",
node->fullpath, phandle, other->fullpath);
return;
}
@@ -453,7 +496,7 @@ static void check_name_properties(struct check *c, struct dt_info *dti,
if ((prop->val.len != node->basenamelen+1)
|| (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
- FAIL(c, "\"name\" property in %s is incorrect (\"%s\" instead"
+ FAIL(c, dti, "\"name\" property in %s is incorrect (\"%s\" instead"
" of base node name)", node->fullpath, prop->val.val);
} else {
/* The name property is correct, and therefore redundant.
@@ -488,16 +531,16 @@ static void fixup_phandle_references(struct check *c, struct dt_info *dti,
refnode = get_node_by_ref(dt, m->ref);
if (! refnode) {
if (!(dti->dtsflags & DTSF_PLUGIN))
- FAIL(c, "Reference to non-existent node or "
+ FAIL(c, dti, "Reference to non-existent node or "
"label \"%s\"\n", m->ref);
else /* mark the entry as unresolved */
- *((cell_t *)(prop->val.val + m->offset)) =
+ *((fdt32_t *)(prop->val.val + m->offset)) =
cpu_to_fdt32(0xffffffff);
continue;
}
phandle = get_node_phandle(dt, refnode);
- *((cell_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
+ *((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
}
}
}
@@ -520,7 +563,7 @@ static void fixup_path_references(struct check *c, struct dt_info *dti,
refnode = get_node_by_ref(dt, m->ref);
if (!refnode) {
- FAIL(c, "Reference to non-existent node or label \"%s\"\n",
+ FAIL(c, dti, "Reference to non-existent node or label \"%s\"\n",
m->ref);
continue;
}
@@ -579,19 +622,19 @@ static void check_reg_format(struct check *c, struct dt_info *dti,
return; /* No "reg", that's fine */
if (!node->parent) {
- FAIL(c, "Root node has a \"reg\" property");
+ FAIL(c, dti, "Root node has a \"reg\" property");
return;
}
if (prop->val.len == 0)
- FAIL(c, "\"reg\" property in %s is empty", node->fullpath);
+ FAIL(c, dti, "\"reg\" property in %s is empty", node->fullpath);
addr_cells = node_addr_cells(node->parent);
size_cells = node_size_cells(node->parent);
entrylen = (addr_cells + size_cells) * sizeof(cell_t);
if (!entrylen || (prop->val.len % entrylen) != 0)
- FAIL(c, "\"reg\" property in %s has invalid length (%d bytes) "
+ FAIL(c, dti, "\"reg\" property in %s has invalid length (%d bytes) "
"(#address-cells == %d, #size-cells == %d)",
node->fullpath, prop->val.len, addr_cells, size_cells);
}
@@ -608,7 +651,7 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
return;
if (!node->parent) {
- FAIL(c, "Root node has a \"ranges\" property");
+ FAIL(c, dti, "Root node has a \"ranges\" property");
return;
}
@@ -620,17 +663,17 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
if (prop->val.len == 0) {
if (p_addr_cells != c_addr_cells)
- FAIL(c, "%s has empty \"ranges\" property but its "
+ FAIL(c, dti, "%s has empty \"ranges\" property but its "
"#address-cells (%d) differs from %s (%d)",
node->fullpath, c_addr_cells, node->parent->fullpath,
p_addr_cells);
if (p_size_cells != c_size_cells)
- FAIL(c, "%s has empty \"ranges\" property but its "
+ FAIL(c, dti, "%s has empty \"ranges\" property but its "
"#size-cells (%d) differs from %s (%d)",
node->fullpath, c_size_cells, node->parent->fullpath,
p_size_cells);
} else if ((prop->val.len % entrylen) != 0) {
- FAIL(c, "\"ranges\" property in %s has invalid length (%d bytes) "
+ FAIL(c, dti, "\"ranges\" property in %s has invalid length (%d bytes) "
"(parent #address-cells == %d, child #address-cells == %d, "
"#size-cells == %d)", node->fullpath, prop->val.len,
p_addr_cells, c_addr_cells, c_size_cells);
@@ -638,6 +681,229 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
}
WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells);
+static const struct bus_type pci_bus = {
+ .name = "PCI",
+};
+
+static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *node)
+{
+ struct property *prop;
+ cell_t *cells;
+
+ prop = get_property(node, "device_type");
+ if (!prop || !streq(prop->val.val, "pci"))
+ return;
+
+ node->bus = &pci_bus;
+
+ if (!strneq(node->name, "pci", node->basenamelen) &&
+ !strneq(node->name, "pcie", node->basenamelen))
+ FAIL(c, dti, "Node %s node name is not \"pci\" or \"pcie\"",
+ node->fullpath);
+
+ prop = get_property(node, "ranges");
+ if (!prop)
+ FAIL(c, dti, "Node %s missing ranges for PCI bridge (or not a bridge)",
+ node->fullpath);
+
+ if (node_addr_cells(node) != 3)
+ FAIL(c, dti, "Node %s incorrect #address-cells for PCI bridge",
+ node->fullpath);
+ if (node_size_cells(node) != 2)
+ FAIL(c, dti, "Node %s incorrect #size-cells for PCI bridge",
+ node->fullpath);
+
+ prop = get_property(node, "bus-range");
+ if (!prop) {
+ FAIL(c, dti, "Node %s missing bus-range for PCI bridge",
+ node->fullpath);
+ return;
+ }
+ if (prop->val.len != (sizeof(cell_t) * 2)) {
+ FAIL(c, dti, "Node %s bus-range must be 2 cells",
+ node->fullpath);
+ return;
+ }
+ cells = (cell_t *)prop->val.val;
+ if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1]))
+ FAIL(c, dti, "Node %s bus-range 1st cell must be less than or equal to 2nd cell",
+ node->fullpath);
+ if (fdt32_to_cpu(cells[1]) > 0xff)
+ FAIL(c, dti, "Node %s bus-range maximum bus number must be less than 256",
+ node->fullpath);
+}
+WARNING(pci_bridge, check_pci_bridge, NULL,
+ &device_type_is_string, &addr_size_cells);
+
+static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struct node *node)
+{
+ struct property *prop;
+ unsigned int bus_num, min_bus, max_bus;
+ cell_t *cells;
+
+ if (!node->parent || (node->parent->bus != &pci_bus))
+ return;
+
+ prop = get_property(node, "reg");
+ if (!prop)
+ return;
+
+ cells = (cell_t *)prop->val.val;
+ bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16;
+
+ prop = get_property(node->parent, "bus-range");
+ if (!prop) {
+ min_bus = max_bus = 0;
+ } else {
+ cells = (cell_t *)prop->val.val;
+ min_bus = fdt32_to_cpu(cells[0]);
+ max_bus = fdt32_to_cpu(cells[0]);
+ }
+ if ((bus_num < min_bus) || (bus_num > max_bus))
+ FAIL(c, dti, "Node %s PCI bus number %d out of range, expected (%d - %d)",
+ node->fullpath, bus_num, min_bus, max_bus);
+}
+WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, &reg_format, &pci_bridge);
+
+static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct node *node)
+{
+ struct property *prop;
+ const char *unitname = get_unitname(node);
+ char unit_addr[5];
+ unsigned int dev, func, reg;
+ cell_t *cells;
+
+ if (!node->parent || (node->parent->bus != &pci_bus))
+ return;
+
+ prop = get_property(node, "reg");
+ if (!prop) {
+ FAIL(c, dti, "Node %s missing PCI reg property", node->fullpath);
+ return;
+ }
+
+ cells = (cell_t *)prop->val.val;
+ if (cells[1] || cells[2])
+ FAIL(c, dti, "Node %s PCI reg config space address cells 2 and 3 must be 0",
+ node->fullpath);
+
+ reg = fdt32_to_cpu(cells[0]);
+ dev = (reg & 0xf800) >> 11;
+ func = (reg & 0x700) >> 8;
+
+ if (reg & 0xff000000)
+ FAIL(c, dti, "Node %s PCI reg address is not configuration space",
+ node->fullpath);
+ if (reg & 0x000000ff)
+ FAIL(c, dti, "Node %s PCI reg config space address register number must be 0",
+ node->fullpath);
+
+ if (func == 0) {
+ snprintf(unit_addr, sizeof(unit_addr), "%x", dev);
+ if (streq(unitname, unit_addr))
+ return;
+ }
+
+ snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func);
+ if (streq(unitname, unit_addr))
+ return;
+
+ FAIL(c, dti, "Node %s PCI unit address format error, expected \"%s\"",
+ node->fullpath, unit_addr);
+}
+WARNING(pci_device_reg, check_pci_device_reg, NULL, &reg_format, &pci_bridge);
+
+static const struct bus_type simple_bus = {
+ .name = "simple-bus",
+};
+
+static bool node_is_compatible(struct node *node, const char *compat)
+{
+ struct property *prop;
+ const char *str, *end;
+
+ prop = get_property(node, "compatible");
+ if (!prop)
+ return false;
+
+ for (str = prop->val.val, end = str + prop->val.len; str < end;
+ str += strnlen(str, end - str) + 1) {
+ if (strneq(str, compat, end - str))
+ return true;
+ }
+ return false;
+}
+
+static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
+{
+ if (node_is_compatible(node, "simple-bus"))
+ node->bus = &simple_bus;
+}
+WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL, &addr_size_cells);
+
+static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
+{
+ struct property *prop;
+ const char *unitname = get_unitname(node);
+ char unit_addr[17];
+ unsigned int size;
+ uint64_t reg = 0;
+ cell_t *cells = NULL;
+
+ if (!node->parent || (node->parent->bus != &simple_bus))
+ return;
+
+ prop = get_property(node, "reg");
+ if (prop)
+ cells = (cell_t *)prop->val.val;
+ else {
+ prop = get_property(node, "ranges");
+ if (prop && prop->val.len)
+ /* skip of child address */
+ cells = ((cell_t *)prop->val.val) + node_addr_cells(node);
+ }
+
+ if (!cells) {
+ if (node->parent->parent && !(node->bus == &simple_bus))
+ FAIL(c, dti, "Node %s missing or empty reg/ranges property", node->fullpath);
+ return;
+ }
+
+ size = node_addr_cells(node->parent);
+ while (size--)
+ reg = (reg << 32) | fdt32_to_cpu(*(cells++));
+
+ snprintf(unit_addr, sizeof(unit_addr), "%lx", reg);
+ if (!streq(unitname, unit_addr))
+ FAIL(c, dti, "Node %s simple-bus unit address format error, expected \"%s\"",
+ node->fullpath, unit_addr);
+}
+WARNING(simple_bus_reg, check_simple_bus_reg, NULL, &reg_format, &simple_bus_bridge);
+
+static void check_unit_address_format(struct check *c, struct dt_info *dti,
+ struct node *node)
+{
+ const char *unitname = get_unitname(node);
+
+ if (node->parent && node->parent->bus)
+ return;
+
+ if (!unitname[0])
+ return;
+
+ if (!strncmp(unitname, "0x", 2)) {
+ FAIL(c, dti, "Node %s unit name should not have leading \"0x\"",
+ node->fullpath);
+ /* skip over 0x for next test */
+ unitname += 2;
+ }
+ if (unitname[0] == '0' && isxdigit(unitname[1]))
+ FAIL(c, dti, "Node %s unit name should not have leading 0s",
+ node->fullpath);
+}
+WARNING(unit_address_format, check_unit_address_format, NULL,
+ &node_name_format, &pci_bridge, &simple_bus_bridge);
+
/*
* Style checks
*/
@@ -656,11 +922,11 @@ static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
return;
if (node->parent->addr_cells == -1)
- FAIL(c, "Relying on default #address-cells value for %s",
+ FAIL(c, dti, "Relying on default #address-cells value for %s",
node->fullpath);
if (node->parent->size_cells == -1)
- FAIL(c, "Relying on default #size-cells value for %s",
+ FAIL(c, dti, "Relying on default #size-cells value for %s",
node->fullpath);
}
WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
@@ -684,7 +950,7 @@ static void check_obsolete_chosen_interrupt_controller(struct check *c,
prop = get_property(chosen, "interrupt-controller");
if (prop)
- FAIL(c, "/chosen has obsolete \"interrupt-controller\" "
+ FAIL(c, dti, "/chosen has obsolete \"interrupt-controller\" "
"property");
}
WARNING(obsolete_chosen_interrupt_controller,
@@ -703,9 +969,20 @@ static struct check *check_table[] = {
&address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
&device_type_is_string, &model_is_string, &status_is_string,
+ &property_name_chars_strict,
+ &node_name_chars_strict,
+
&addr_size_cells, &reg_format, &ranges_format,
&unit_address_vs_reg,
+ &unit_address_format,
+
+ &pci_bridge,
+ &pci_device_reg,
+ &pci_device_bus_num,
+
+ &simple_bus_bridge,
+ &simple_bus_reg,
&avoid_default_addr_size,
&obsolete_chosen_interrupt_controller,
generated by cgit (git 2.34.1) at 2024-05-28 03:22:07 +0000