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Merge "fix(amu): remove amu_fconf.c" into integration
This commit is contained in:
Madhukar Pappireddy
TrustedFirmware Code Review
commit
ed0722fe17
@ -1,200 +0,0 @@
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/*
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* Copyright (c) 2021, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "amu_private.h"
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#include <common/debug.h>
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#include <common/fdt_wrappers.h>
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#include <lib/extensions/amu.h>
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#include <lib/fconf/fconf.h>
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#include <libfdt.h>
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#include <plat/common/platform.h>
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static bool amu_topology_populated_ ; /* Whether the topology is valid */
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static struct amu_fconf_topology amu_topology_; /* Populated topology cache */
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const struct amu_fconf_topology *amu_topology(void)
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{
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if (!amu_topology_populated_) {
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return NULL;
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}
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return &amu_topology_;
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}
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/*
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* Populate the core-specific AMU structure with information retrieved from a
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* device tree.
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*
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* Returns `0` on success, or a negative integer representing an error code.
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*/
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static int amu_fconf_populate_cpu_amu(const void *fdt, int parent,
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struct amu_fconf_core *amu)
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{
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int ret = 0;
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int node = 0;
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fdt_for_each_subnode(node, fdt, parent) {
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const char *name;
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const char *value;
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int len;
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uintptr_t idx = 0U;
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name = fdt_get_name(fdt, node, &len);
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if (strncmp(name, "counter@", 8) != 0) {
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continue;
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}
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ret = fdt_get_reg_props_by_index(fdt, node, 0, &idx, NULL);
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if (ret < 0) {
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break;
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}
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value = fdt_getprop(fdt, node, "enable-at-el3", &len);
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if ((value == NULL) && (len != -FDT_ERR_NOTFOUND)) {
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break;
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}
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if (len != -FDT_ERR_NOTFOUND) {
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amu->enable |= (1 << idx);
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}
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}
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if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
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return node;
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}
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return ret;
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}
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/*
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* Within a `cpu` node, attempt to dereference the `amu` property, and populate
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* the AMU information for the core.
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*
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* Returns `0` on success, or a negative integer representing an error code.
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*/
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static int amu_fconf_populate_cpu(const void *fdt, int node, uintptr_t mpidr)
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{
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int ret;
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int idx;
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uint32_t amu_phandle;
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struct amu_fconf_core *amu;
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ret = fdt_read_uint32(fdt, node, "amu", &amu_phandle);
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if (ret < 0) {
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if (ret == -FDT_ERR_NOTFOUND) {
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ret = 0;
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}
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return ret;
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}
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node = fdt_node_offset_by_phandle(fdt, amu_phandle);
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if (node < 0) {
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return node;
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}
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idx = plat_core_pos_by_mpidr(mpidr);
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amu = &amu_topology_.cores[idx];
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return amu_fconf_populate_cpu_amu(fdt, node, amu);
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}
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/*
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* For every CPU node (`/cpus/cpu@n`) in an FDT, executes a callback passing a
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* pointer to the FDT and the offset of the CPU node. If the return value of the
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* callback is negative, it is treated as an error and the loop is aborted. In
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* this situation, the value of the callback is returned from the function.
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*
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* Returns `0` on success, or a negative integer representing an error code.
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*/
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static int amu_fconf_foreach_cpu(const void *fdt,
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int (*callback)(const void *, int, uintptr_t))
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{
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int ret = 0;
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int parent, node = 0;
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parent = fdt_path_offset(fdt, "/cpus");
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if (parent < 0) {
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if (parent == -FDT_ERR_NOTFOUND) {
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parent = 0;
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}
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return parent;
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}
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fdt_for_each_subnode(node, fdt, parent) {
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const char *name;
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int len;
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uintptr_t mpidr = 0U;
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name = fdt_get_name(fdt, node, &len);
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if (strncmp(name, "cpu@", 4) != 0) {
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continue;
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}
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ret = fdt_get_reg_props_by_index(fdt, node, 0, &mpidr, NULL);
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if (ret < 0) {
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break;
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}
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ret = callback(fdt, node, mpidr);
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if (ret < 0) {
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break;
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}
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}
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if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
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return node;
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}
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return ret;
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}
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/*
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* Populates the global `amu_topology` structure based on what's described by
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* the hardware configuration device tree blob.
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*
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* The device tree is expected to provide an `amu` property for each `cpu` node,
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* like so:
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*
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* cpu@0 {
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* amu = <&cpu0_amu>;
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* };
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*
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* amus {
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* cpu0_amu: amu-0 {
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* counters {
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* #address-cells = <2>;
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* #size-cells = <0>;
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*
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* counter@x,y {
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* reg = <x y>; // Group x, counter y
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* };
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* };
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* };
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* };
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*/
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static int amu_fconf_populate(uintptr_t config)
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{
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int ret = amu_fconf_foreach_cpu(
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(const void *)config, amu_fconf_populate_cpu);
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if (ret < 0) {
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ERROR("AMU-FCONF: Failed to configure AMU: %d\n", ret);
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} else {
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amu_topology_populated_ = true;
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}
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return ret;
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}
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FCONF_REGISTER_POPULATOR(HW_CONFIG, amu, amu_fconf_populate);
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