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authorLinus Torvalds <torvalds@linux-foundation.org>2019-05-16 18:31:32 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-16 18:31:32 +0300
commit22c58fd70ca48a29505922b1563826593b08cc00 (patch)
treeee3154075bcd0a867fd0abf7e00ba3b4055999d4 /drivers/firmware
parenta455eda33faafcaac1effb31d682765b14ef868c (diff)
parent7a0c4c17089a8aff52f516f0f52002be52950aae (diff)
downloadlinux-22c58fd70ca48a29505922b1563826593b08cc00.tar.xz
Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC platform updates from Olof Johansson: "SoC updates, mostly refactorings and cleanups of old legacy platforms. Major themes this release: - Conversion of ixp4xx to a modern platform (drivers, DT, bindings) - Moving some of the ep93xx headers around to get it closer to multiplatform enabled. - Cleanups of Davinci This also contains a few patches that were queued up as fixes before 5.1 but I didn't get sent in before release" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (123 commits) ARM: debug-ll: add default address for digicolor ARM: u300: regulator: add MODULE_LICENSE() ARM: ep93xx: move private headers out of mach/* ARM: ep93xx: move pinctrl interfaces into include/linux/soc ARM: ep93xx: keypad: stop using mach/platform.h ARM: ep93xx: move network platform data to separate header ARM: stm32: add AMBA support for stm32 family MAINTAINERS: update arch/arm/mach-davinci ARM: rockchip: add missing of_node_put in rockchip_smp_prepare_pmu ARM: dts: Add queue manager and NPE to the IXP4xx DTSI soc: ixp4xx: qmgr: Add DT probe code soc: ixp4xx: qmgr: Add DT bindings for IXP4xx qmgr soc: ixp4xx: npe: Add DT probe code soc: ixp4xx: Add DT bindings for IXP4xx NPE soc: ixp4xx: qmgr: Pass resources soc: ixp4xx: Remove unused functions soc: ixp4xx: Uninline several functions soc: ixp4xx: npe: Pass addresses as resources ARM: ixp4xx: Turn the QMGR into a platform device ARM: ixp4xx: Turn the NPE into a platform device ...
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/Kconfig16
-rw-r--r--drivers/firmware/Makefile1
-rw-r--r--drivers/firmware/trusted_foundations.c176
3 files changed, 193 insertions, 0 deletions
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 7b655f6156fb..11fda9eb2466 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -253,6 +253,22 @@ config TI_SCI_PROTOCOL
This protocol library is used by client drivers to use the features
provided by the system controller.
+config TRUSTED_FOUNDATIONS
+ bool "Trusted Foundations secure monitor support"
+ depends on ARM
+ help
+ Some devices (including most early Tegra-based consumer devices on
+ the market) are booted with the Trusted Foundations secure monitor
+ active, requiring some core operations to be performed by the secure
+ monitor instead of the kernel.
+
+ This option allows the kernel to invoke the secure monitor whenever
+ required on devices using Trusted Foundations. See the functions and
+ comments in linux/firmware/trusted_foundations.h or the device tree
+ bindings for "tlm,trusted-foundations" for details on how to use it.
+
+ Choose N if you don't know what this is about.
+
config HAVE_ARM_SMCCC
bool
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 9a3909a22682..3fa0b34eb72f 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_QCOM_SCM_64) += qcom_scm-64.o
obj-$(CONFIG_QCOM_SCM_32) += qcom_scm-32.o
CFLAGS_qcom_scm-32.o :=$(call as-instr,.arch armv7-a\n.arch_extension sec,-DREQUIRES_SEC=1) -march=armv7-a
obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o
+obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o
obj-$(CONFIG_ARM_SCMI_PROTOCOL) += arm_scmi/
obj-y += psci/
diff --git a/drivers/firmware/trusted_foundations.c b/drivers/firmware/trusted_foundations.c
new file mode 100644
index 000000000000..fd4999388ff1
--- /dev/null
+++ b/drivers/firmware/trusted_foundations.c
@@ -0,0 +1,176 @@
+/*
+ * Trusted Foundations support for ARM CPUs
+ *
+ * Copyright (c) 2013, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of.h>
+
+#include <linux/firmware/trusted_foundations.h>
+
+#include <asm/firmware.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/outercache.h>
+
+#define TF_CACHE_MAINT 0xfffff100
+
+#define TF_CACHE_ENABLE 1
+#define TF_CACHE_DISABLE 2
+
+#define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200
+
+#define TF_CPU_PM 0xfffffffc
+#define TF_CPU_PM_S3 0xffffffe3
+#define TF_CPU_PM_S2 0xffffffe6
+#define TF_CPU_PM_S2_NO_MC_CLK 0xffffffe5
+#define TF_CPU_PM_S1 0xffffffe4
+#define TF_CPU_PM_S1_NOFLUSH_L2 0xffffffe7
+
+static unsigned long cpu_boot_addr;
+
+static void tf_generic_smc(u32 type, u32 arg1, u32 arg2)
+{
+ register u32 r0 asm("r0") = type;
+ register u32 r1 asm("r1") = arg1;
+ register u32 r2 asm("r2") = arg2;
+
+ asm volatile(
+ ".arch_extension sec\n\t"
+ "stmfd sp!, {r4 - r11}\n\t"
+ __asmeq("%0", "r0")
+ __asmeq("%1", "r1")
+ __asmeq("%2", "r2")
+ "mov r3, #0\n\t"
+ "mov r4, #0\n\t"
+ "smc #0\n\t"
+ "ldmfd sp!, {r4 - r11}\n\t"
+ :
+ : "r" (r0), "r" (r1), "r" (r2)
+ : "memory", "r3", "r12", "lr");
+}
+
+static int tf_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
+{
+ cpu_boot_addr = boot_addr;
+ tf_generic_smc(TF_SET_CPU_BOOT_ADDR_SMC, cpu_boot_addr, 0);
+
+ return 0;
+}
+
+static int tf_prepare_idle(unsigned long mode)
+{
+ switch (mode) {
+ case TF_PM_MODE_LP0:
+ tf_generic_smc(TF_CPU_PM, TF_CPU_PM_S3, cpu_boot_addr);
+ break;
+
+ case TF_PM_MODE_LP1:
+ tf_generic_smc(TF_CPU_PM, TF_CPU_PM_S2, cpu_boot_addr);
+ break;
+
+ case TF_PM_MODE_LP1_NO_MC_CLK:
+ tf_generic_smc(TF_CPU_PM, TF_CPU_PM_S2_NO_MC_CLK,
+ cpu_boot_addr);
+ break;
+
+ case TF_PM_MODE_LP2:
+ tf_generic_smc(TF_CPU_PM, TF_CPU_PM_S1, cpu_boot_addr);
+ break;
+
+ case TF_PM_MODE_LP2_NOFLUSH_L2:
+ tf_generic_smc(TF_CPU_PM, TF_CPU_PM_S1_NOFLUSH_L2,
+ cpu_boot_addr);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_CACHE_L2X0
+static void tf_cache_write_sec(unsigned long val, unsigned int reg)
+{
+ u32 l2x0_way_mask = 0xff;
+
+ switch (reg) {
+ case L2X0_CTRL:
+ if (l2x0_saved_regs.aux_ctrl & L310_AUX_CTRL_ASSOCIATIVITY_16)
+ l2x0_way_mask = 0xffff;
+
+ if (val == L2X0_CTRL_EN)
+ tf_generic_smc(TF_CACHE_MAINT, TF_CACHE_ENABLE,
+ l2x0_saved_regs.aux_ctrl);
+ else
+ tf_generic_smc(TF_CACHE_MAINT, TF_CACHE_DISABLE,
+ l2x0_way_mask);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static int tf_init_cache(void)
+{
+ outer_cache.write_sec = tf_cache_write_sec;
+
+ return 0;
+}
+#endif /* CONFIG_CACHE_L2X0 */
+
+static const struct firmware_ops trusted_foundations_ops = {
+ .set_cpu_boot_addr = tf_set_cpu_boot_addr,
+ .prepare_idle = tf_prepare_idle,
+#ifdef CONFIG_CACHE_L2X0
+ .l2x0_init = tf_init_cache,
+#endif
+};
+
+void register_trusted_foundations(struct trusted_foundations_platform_data *pd)
+{
+ /*
+ * we are not using version information for now since currently
+ * supported SMCs are compatible with all TF releases
+ */
+ register_firmware_ops(&trusted_foundations_ops);
+}
+
+void of_register_trusted_foundations(void)
+{
+ struct device_node *node;
+ struct trusted_foundations_platform_data pdata;
+ int err;
+
+ node = of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations");
+ if (!node)
+ return;
+
+ err = of_property_read_u32(node, "tlm,version-major",
+ &pdata.version_major);
+ if (err != 0)
+ panic("Trusted Foundation: missing version-major property\n");
+ err = of_property_read_u32(node, "tlm,version-minor",
+ &pdata.version_minor);
+ if (err != 0)
+ panic("Trusted Foundation: missing version-minor property\n");
+ register_trusted_foundations(&pdata);
+}
+
+bool trusted_foundations_registered(void)
+{
+ return firmware_ops == &trusted_foundations_ops;
+}