GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/drivers/arm/fvp/fvp_pwrc.c

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <drivers/arm/fvp/fvp_pwrc.h>
+#include <lib/bakery_lock.h>
+#include <lib/mmio.h>
+#include <plat/arm/common/plat_arm.h>
+#include <platform_def.h>
+
+/*
+ * TODO: Someday there will be a generic power controller api. At the moment
+ * each platform has its own pwrc so just exporting functions is fine.
+ */
+ARM_INSTANTIATE_LOCK;
+
+unsigned int fvp_pwrc_get_cpu_wkr(u_register_t mpidr)
+{
+	return PSYSR_WK(fvp_pwrc_read_psysr(mpidr));
+}
+
+unsigned int fvp_pwrc_read_psysr(u_register_t mpidr)
+{
+	unsigned int rc;
+	arm_lock_get();
+	mmio_write_32(PWRC_BASE + PSYSR_OFF, (unsigned int) mpidr);
+	rc = mmio_read_32(PWRC_BASE + PSYSR_OFF);
+	arm_lock_release();
+	return rc;
+}
+
+void fvp_pwrc_write_pponr(u_register_t mpidr)
+{
+	arm_lock_get();
+	mmio_write_32(PWRC_BASE + PPONR_OFF, (unsigned int) mpidr);
+	arm_lock_release();
+}
+
+void fvp_pwrc_write_ppoffr(u_register_t mpidr)
+{
+	arm_lock_get();
+	mmio_write_32(PWRC_BASE + PPOFFR_OFF, (unsigned int) mpidr);
+	arm_lock_release();
+}
+
+void fvp_pwrc_set_wen(u_register_t mpidr)
+{
+	arm_lock_get();
+	mmio_write_32(PWRC_BASE + PWKUPR_OFF,
+		      (unsigned int) (PWKUPR_WEN | mpidr));
+	arm_lock_release();
+}
+
+void fvp_pwrc_clr_wen(u_register_t mpidr)
+{
+	arm_lock_get();
+	mmio_write_32(PWRC_BASE + PWKUPR_OFF,
+		      (unsigned int) mpidr);
+	arm_lock_release();
+}
+
+void fvp_pwrc_write_pcoffr(u_register_t mpidr)
+{
+	arm_lock_get();
+	mmio_write_32(PWRC_BASE + PCOFFR_OFF, (unsigned int) mpidr);
+	arm_lock_release();
+}
+
+/* Nothing else to do here apart from initializing the lock */
+void __init plat_arm_pwrc_setup(void)
+{
+	arm_lock_init();
+}
+
+
+