Merge changes from topic "raspberry-pi-4-support" into integration
* changes: Add fdt_add_reserved_memory() helper function qemu: Move and generalise FDT PSCI fixup
This commit is contained in:
commit
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/*
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* Copyright (c) 2016-2019, ARM Limited and Contributors. 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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/*
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* Contains generic routines to fix up the device tree blob passed on to
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* payloads like BL32 and BL33 (and further down the boot chain).
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* This allows to easily add PSCI nodes, when the original DT does not have
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* it or advertises another method.
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* Also it supports to add reserved memory nodes to describe memory that
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* is used by the secure world, so that non-secure software avoids using
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* that.
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*/
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#include <string.h>
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#include <libfdt.h>
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#include <common/debug.h>
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#include <drivers/console.h>
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#include <lib/psci/psci.h>
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#include <common/fdt_fixup.h>
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static int append_psci_compatible(void *fdt, int offs, const char *str)
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{
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return fdt_appendprop(fdt, offs, "compatible", str, strlen(str) + 1);
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}
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int dt_add_psci_node(void *fdt)
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{
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int offs;
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if (fdt_path_offset(fdt, "/psci") >= 0) {
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WARN("PSCI Device Tree node already exists!\n");
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return 0;
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}
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offs = fdt_path_offset(fdt, "/");
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if (offs < 0)
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return -1;
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offs = fdt_add_subnode(fdt, offs, "psci");
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if (offs < 0)
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return -1;
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if (append_psci_compatible(fdt, offs, "arm,psci-1.0"))
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return -1;
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if (append_psci_compatible(fdt, offs, "arm,psci-0.2"))
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return -1;
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if (append_psci_compatible(fdt, offs, "arm,psci"))
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return -1;
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if (fdt_setprop_string(fdt, offs, "method", "smc"))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "cpu_suspend", PSCI_CPU_SUSPEND_AARCH64))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "cpu_off", PSCI_CPU_OFF))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "cpu_on", PSCI_CPU_ON_AARCH64))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "sys_poweroff", PSCI_SYSTEM_OFF))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "sys_reset", PSCI_SYSTEM_RESET))
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return -1;
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return 0;
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}
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/*
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* Find the first subnode that has a "device_type" property with the value
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* "cpu" and which's enable-method is not "psci" (yet).
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* Returns 0 if no such subnode is found, so all have already been patched
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* or none have to be patched in the first place.
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* Returns 1 if *one* such subnode has been found and successfully changed
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* to "psci".
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* Returns -1 on error.
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*
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* Call in a loop until it returns 0. Recalculate the node offset after
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* it has returned 1.
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*/
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static int dt_update_one_cpu_node(void *fdt, int offset)
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{
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int offs;
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/* Iterate over all subnodes to find those with device_type = "cpu". */
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for (offs = fdt_first_subnode(fdt, offset); offs >= 0;
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offs = fdt_next_subnode(fdt, offs)) {
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const char *prop;
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int len;
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prop = fdt_getprop(fdt, offs, "device_type", &len);
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if (!prop)
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continue;
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if (memcmp(prop, "cpu", 4) != 0 || len != 4)
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continue;
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/* Ignore any nodes which already use "psci". */
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prop = fdt_getprop(fdt, offs, "enable-method", &len);
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if (prop && memcmp(prop, "psci", 5) == 0 && len == 5)
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continue;
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if (fdt_setprop_string(fdt, offs, "enable-method", "psci"))
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return -1;
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/*
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* Subnode found and patched.
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* Restart to accommodate potentially changed offsets.
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*/
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return 1;
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}
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if (offs == -FDT_ERR_NOTFOUND)
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return 0;
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return offs;
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}
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int dt_add_psci_cpu_enable_methods(void *fdt)
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{
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int offs, ret;
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do {
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offs = fdt_path_offset(fdt, "/cpus");
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if (offs < 0)
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return offs;
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ret = dt_update_one_cpu_node(fdt, offs);
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} while (ret > 0);
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return ret;
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}
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#define HIGH_BITS(x) ((sizeof(x) > 4) ? ((x) >> 32) : (typeof(x))0)
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int fdt_add_reserved_memory(void *dtb, const char *node_name,
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uintptr_t base, size_t size)
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{
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int offs = fdt_path_offset(dtb, "/reserved-memory");
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uint32_t addresses[3];
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if (offs < 0) { /* create if not existing yet */
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offs = fdt_add_subnode(dtb, 0, "reserved-memory");
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if (offs < 0)
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return offs;
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fdt_setprop_u32(dtb, offs, "#address-cells", 2);
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fdt_setprop_u32(dtb, offs, "#size-cells", 1);
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fdt_setprop(dtb, offs, "ranges", NULL, 0);
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}
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addresses[0] = cpu_to_fdt32(HIGH_BITS(base));
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addresses[1] = cpu_to_fdt32(base & 0xffffffff);
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addresses[2] = cpu_to_fdt32(size & 0xffffffff);
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offs = fdt_add_subnode(dtb, offs, node_name);
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fdt_setprop(dtb, offs, "no-map", NULL, 0);
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fdt_setprop(dtb, offs, "reg", addresses, 12);
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return 0;
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}
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@ -0,0 +1,15 @@
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/*
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* Copyright (c) 2019, ARM Limited and Contributors. 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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#ifndef FDT_FIXUP_H
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#define FDT_FIXUP_H
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int dt_add_psci_node(void *fdt);
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int dt_add_psci_cpu_enable_methods(void *fdt);
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int fdt_add_reserved_memory(void *dtb, const char *node_name,
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uintptr_t base, size_t size);
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#endif /* FDT_FIXUP_H */
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@ -1,99 +0,0 @@
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/*
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* Copyright (c) 2016, ARM Limited and Contributors. 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 <string.h>
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#include <libfdt.h>
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#include <common/debug.h>
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#include <drivers/console.h>
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#include <lib/psci/psci.h>
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#include "qemu_private.h"
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static int append_psci_compatible(void *fdt, int offs, const char *str)
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{
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return fdt_appendprop(fdt, offs, "compatible", str, strlen(str) + 1);
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}
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int dt_add_psci_node(void *fdt)
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{
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int offs;
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if (fdt_path_offset(fdt, "/psci") >= 0) {
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WARN("PSCI Device Tree node already exists!\n");
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return 0;
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}
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offs = fdt_path_offset(fdt, "/");
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if (offs < 0)
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return -1;
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offs = fdt_add_subnode(fdt, offs, "psci");
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if (offs < 0)
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return -1;
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if (append_psci_compatible(fdt, offs, "arm,psci-1.0"))
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return -1;
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if (append_psci_compatible(fdt, offs, "arm,psci-0.2"))
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return -1;
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if (append_psci_compatible(fdt, offs, "arm,psci"))
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return -1;
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if (fdt_setprop_string(fdt, offs, "method", "smc"))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "cpu_suspend", PSCI_CPU_SUSPEND_AARCH64))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "cpu_off", PSCI_CPU_OFF))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "cpu_on", PSCI_CPU_ON_AARCH64))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "sys_poweroff", PSCI_SYSTEM_OFF))
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return -1;
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if (fdt_setprop_u32(fdt, offs, "sys_reset", PSCI_SYSTEM_RESET))
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return -1;
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return 0;
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}
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static int check_node_compat_prefix(void *fdt, int offs, const char *prefix)
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{
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const size_t prefix_len = strlen(prefix);
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size_t l;
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int plen;
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const char *prop;
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prop = fdt_getprop(fdt, offs, "compatible", &plen);
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if (!prop)
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return -1;
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while (plen > 0) {
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if (memcmp(prop, prefix, prefix_len) == 0)
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return 0; /* match */
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l = strlen(prop) + 1;
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prop += l;
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plen -= l;
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}
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return -1;
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}
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int dt_add_psci_cpu_enable_methods(void *fdt)
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{
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int offs = 0;
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while (1) {
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offs = fdt_next_node(fdt, offs, NULL);
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if (offs < 0)
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break;
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if (fdt_getprop(fdt, offs, "enable-method", NULL))
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continue; /* already set */
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if (check_node_compat_prefix(fdt, offs, "arm,cortex-a"))
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continue; /* no compatible */
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if (fdt_setprop_string(fdt, offs, "enable-method", "psci"))
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return -1;
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/* Need to restart scanning as offsets may have changed */
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offs = 0;
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}
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return 0;
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}
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@ -114,7 +114,7 @@ BL2_SOURCES += drivers/io/io_semihosting.c \
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plat/qemu/qemu_io_storage.c \
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plat/qemu/qemu_io_storage.c \
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plat/qemu/${ARCH}/plat_helpers.S \
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plat/qemu/${ARCH}/plat_helpers.S \
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plat/qemu/qemu_bl2_setup.c \
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plat/qemu/qemu_bl2_setup.c \
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plat/qemu/dt.c \
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common/fdt_fixup.c \
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plat/qemu/qemu_bl2_mem_params_desc.c \
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plat/qemu/qemu_bl2_mem_params_desc.c \
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plat/qemu/qemu_image_load.c \
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plat/qemu/qemu_image_load.c \
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common/desc_image_load.c
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common/desc_image_load.c
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@ -1,5 +1,5 @@
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/*
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/*
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* Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
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* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
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*
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*
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* SPDX-License-Identifier: BSD-3-Clause
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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*/
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@ -15,6 +15,7 @@
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#include <common/bl_common.h>
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#include <common/bl_common.h>
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#include <common/debug.h>
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#include <common/debug.h>
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#include <common/desc_image_load.h>
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#include <common/desc_image_load.h>
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#include <common/fdt_fixup.h>
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#include <lib/optee_utils.h>
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#include <lib/optee_utils.h>
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#include <lib/utils.h>
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#include <lib/utils.h>
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#include <plat/common/platform.h>
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#include <plat/common/platform.h>
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@ -28,9 +28,6 @@ void qemu_configure_mmu_el3(unsigned long total_base, unsigned long total_size,
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void plat_qemu_io_setup(void);
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void plat_qemu_io_setup(void);
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unsigned int plat_qemu_calc_core_pos(u_register_t mpidr);
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unsigned int plat_qemu_calc_core_pos(u_register_t mpidr);
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int dt_add_psci_node(void *fdt);
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int dt_add_psci_cpu_enable_methods(void *fdt);
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void qemu_console_init(void);
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void qemu_console_init(void);
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void plat_qemu_gic_init(void);
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void plat_qemu_gic_init(void);
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