fix(amu): remove `amu_fconf.c`
This file is unused and was introduced accidentally by one of the
commits in the MPMM patch stack. This functionality was instead
introduced by `fconf_amu_getter.c`.
Change-Id: Ib15b1114bacf9a2e7414c1fb35bd4fbdf0179210
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/lib/extensions/amu/amu_fconf.c b/lib/extensions/amu/amu_fconf.c
deleted file mode 100644
index c7fb803..0000000
--- a/lib/extensions/amu/amu_fconf.c
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- * Copyright (c) 2021, Arm Limited. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "amu_private.h"
-#include <common/debug.h>
-#include <common/fdt_wrappers.h>
-#include <lib/extensions/amu.h>
-#include <lib/fconf/fconf.h>
-#include <libfdt.h>
-
-#include <plat/common/platform.h>
-
-static bool amu_topology_populated_ ; /* Whether the topology is valid */
-static struct amu_fconf_topology amu_topology_; /* Populated topology cache */
-
-const struct amu_fconf_topology *amu_topology(void)
-{
- if (!amu_topology_populated_) {
- return NULL;
- }
-
- return &amu_topology_;
-}
-
-/*
- * Populate the core-specific AMU structure with information retrieved from a
- * device tree.
- *
- * Returns `0` on success, or a negative integer representing an error code.
- */
-static int amu_fconf_populate_cpu_amu(const void *fdt, int parent,
- struct amu_fconf_core *amu)
-{
- int ret = 0;
- int node = 0;
-
- fdt_for_each_subnode(node, fdt, parent) {
- const char *name;
- const char *value;
- int len;
-
- uintptr_t idx = 0U;
-
- name = fdt_get_name(fdt, node, &len);
- if (strncmp(name, "counter@", 8) != 0) {
- continue;
- }
-
- ret = fdt_get_reg_props_by_index(fdt, node, 0, &idx, NULL);
- if (ret < 0) {
- break;
- }
-
- value = fdt_getprop(fdt, node, "enable-at-el3", &len);
- if ((value == NULL) && (len != -FDT_ERR_NOTFOUND)) {
- break;
- }
-
- if (len != -FDT_ERR_NOTFOUND) {
- amu->enable |= (1 << idx);
- }
- }
-
- if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
- return node;
- }
-
- return ret;
-}
-
-/*
- * Within a `cpu` node, attempt to dereference the `amu` property, and populate
- * the AMU information for the core.
- *
- * Returns `0` on success, or a negative integer representing an error code.
- */
-static int amu_fconf_populate_cpu(const void *fdt, int node, uintptr_t mpidr)
-{
- int ret;
- int idx;
-
- uint32_t amu_phandle;
- struct amu_fconf_core *amu;
-
- ret = fdt_read_uint32(fdt, node, "amu", &amu_phandle);
- if (ret < 0) {
- if (ret == -FDT_ERR_NOTFOUND) {
- ret = 0;
- }
-
- return ret;
- }
-
- node = fdt_node_offset_by_phandle(fdt, amu_phandle);
- if (node < 0) {
- return node;
- }
-
- idx = plat_core_pos_by_mpidr(mpidr);
- amu = &amu_topology_.cores[idx];
-
- return amu_fconf_populate_cpu_amu(fdt, node, amu);
-}
-
-/*
- * For every CPU node (`/cpus/cpu@n`) in an FDT, executes a callback passing a
- * pointer to the FDT and the offset of the CPU node. If the return value of the
- * callback is negative, it is treated as an error and the loop is aborted. In
- * this situation, the value of the callback is returned from the function.
- *
- * Returns `0` on success, or a negative integer representing an error code.
- */
-static int amu_fconf_foreach_cpu(const void *fdt,
- int (*callback)(const void *, int, uintptr_t))
-{
- int ret = 0;
- int parent, node = 0;
-
- parent = fdt_path_offset(fdt, "/cpus");
- if (parent < 0) {
- if (parent == -FDT_ERR_NOTFOUND) {
- parent = 0;
- }
-
- return parent;
- }
-
- fdt_for_each_subnode(node, fdt, parent) {
- const char *name;
- int len;
-
- uintptr_t mpidr = 0U;
-
- name = fdt_get_name(fdt, node, &len);
- if (strncmp(name, "cpu@", 4) != 0) {
- continue;
- }
-
- ret = fdt_get_reg_props_by_index(fdt, node, 0, &mpidr, NULL);
- if (ret < 0) {
- break;
- }
-
- ret = callback(fdt, node, mpidr);
- if (ret < 0) {
- break;
- }
- }
-
- if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
- return node;
- }
-
- return ret;
-}
-
-/*
- * Populates the global `amu_topology` structure based on what's described by
- * the hardware configuration device tree blob.
- *
- * The device tree is expected to provide an `amu` property for each `cpu` node,
- * like so:
- *
- * cpu@0 {
- * amu = <&cpu0_amu>;
- * };
- *
- * amus {
- * cpu0_amu: amu-0 {
- * counters {
- * #address-cells = <2>;
- * #size-cells = <0>;
- *
- * counter@x,y {
- * reg = <x y>; // Group x, counter y
- * };
- * };
- * };
- * };
- */
-static int amu_fconf_populate(uintptr_t config)
-{
- int ret = amu_fconf_foreach_cpu(
- (const void *)config, amu_fconf_populate_cpu);
- if (ret < 0) {
- ERROR("AMU-FCONF: Failed to configure AMU: %d\n", ret);
- } else {
- amu_topology_populated_ = true;
- }
-
- return ret;
-}
-
-FCONF_REGISTER_POPULATOR(HW_CONFIG, amu, amu_fconf_populate);
